This document provides instructions for experiments on a lathe machine. It includes:
1) An overview of the lathe machine and terminology used like cutting speed, depth of cut, feed rate, and metal removal rate.
2) Details of experiments that will study the effects of varying cutting parameters and material types on tool life, surface finish, and chip formation.
3) Instructions for a turning job on a lathe machine, which will involve operations like plain turning, tapering, threading, grooving, chamfering, and knurling.
4) Specifications of the lathe machine that will be used for the job.
Classification of metal removal process and machines: Concept of generatrix and directrix Geometry of single point cutting tool and tool angles, tool nomenclature in ASA, ORS, NRS. Concept of orthogonal and oblique cutting, Mechanism of Chip Formation: Type of chips. Mechanics of metal cutting, interrelationships between cutting force, shear angle, strain and strain rate. Various theories of metal cutting, Thermal aspects of machining and measurement of chip tool interface temperature, Friction in metal cutting
Conceptual Design of Automated Attachment for Positioning Bed of Drilling Mac...IJSRD
Industrial automation has proven itself an essential part of the industries today. Its application has provided new solutions, making more concepts in manufacturing processes implementable. In this paper author proposing an automated attachment for drilling machine to position worktable with reference to CAD, model. Throughout some literature review, analysing, modelling, and experiments, the implementation of concept will deliver acceptable results. The drilling and positioning as per coordinate extraction program can achieve accurately with the precision of 1mm point to point. The drilling operation can be perform once points are selected and ‘RUN’ radio button click in time less than 3 seconds. This system is design for small scale industry for drilling plastics and aluminium parts like heat sink of LED as an alternate solution to CNC machine in low cost.
Classification of metal removal process and machines: Concept of generatrix and directrix Geometry of single point cutting tool and tool angles, tool nomenclature in ASA, ORS, NRS. Concept of orthogonal and oblique cutting, Mechanism of Chip Formation: Type of chips. Mechanics of metal cutting, interrelationships between cutting force, shear angle, strain and strain rate. Various theories of metal cutting, Thermal aspects of machining and measurement of chip tool interface temperature, Friction in metal cutting
Conceptual Design of Automated Attachment for Positioning Bed of Drilling Mac...IJSRD
Industrial automation has proven itself an essential part of the industries today. Its application has provided new solutions, making more concepts in manufacturing processes implementable. In this paper author proposing an automated attachment for drilling machine to position worktable with reference to CAD, model. Throughout some literature review, analysing, modelling, and experiments, the implementation of concept will deliver acceptable results. The drilling and positioning as per coordinate extraction program can achieve accurately with the precision of 1mm point to point. The drilling operation can be perform once points are selected and ‘RUN’ radio button click in time less than 3 seconds. This system is design for small scale industry for drilling plastics and aluminium parts like heat sink of LED as an alternate solution to CNC machine in low cost.
"Intelligent PCB Drilling Machine"
Nowadays, many industries use the Computerized Numerical Control (CNC) for Printed Circuit Board (PCB) drilling machines in industrial operations. It takes a long time to find optimal tour for large number of nodes (up to thousands). To achieve more effective results, optimization systems approach is required to be equipped in drilling machine. Euclidean Traveling Salesman Problem (TSP) is one of optimization method that gives fast near optimal solution for the drilling machine movement using novel friendly techniques. This project deals with the development of that CNC PCB drilling machine with novel approach to Euclidean TSP. This design can be widely applied to various CNC PCB drilling machines in small and medium scale manufacturing industries.
• My Role In Project:- Project Leader - Design of project , Analysis
• Achievements Of Projects : -
a. Reduce human efforts and errors in PCB drilling.
b. Automation of a traditional PCB drilling m/c.
c. Cost effective automated PCB drill m/c which is affordable by the small scale PCB makers.
d. Most use of electronic waste was from printers or other part of old m/c’s which are scrap.
Effectiveness of multilayer coated tool in turning of aisi 430 f steeleSAT Journals
Abstract This paper presents minimization of surface roughness in dry turning of AISI 430F steel using TiN-TiCN-Al2O3-ZrCN multilayer coated cemented carbide & cryo-treated inserts. Effect of cutting velocity, feed rate, depth of cut & machining duration is studied on the surface roughness. Taguchi’s design of experiment is used to find the optimum factor levels. It is found that the feed rate has much effect in producing lower surface roughness followed by speed. The depth of cut has lesser role on surface roughness. The result of Taguchi method shows that cutting velocity of 250m/min, feed rate of 0.25 mm/rev and depth of cut of 0.3mm should be maintained as optimal parameter settings for both coated and cryo-treated tools. Cryo-treated tools perform better. Keywords: Cryo-treatment, Dry Turning, Surface roughness, Taguchi Method
Machinability Study on Al-7si Alloy Subjected To Grain RefinementIJERA Editor
The present investigation deals with refining the grain structure of Al-7Si (LM25) alloy by adding a suitable amount of grain refiner namely Al-5T-1B and the same was subjected to mechanical vibration. The process involves melting of Al-7Si alloy in an electrical furnace and the molten alloy was degassed using hexachloro ethane degassing tablets. Then the grain refiner was added and later transferred to a pre coated and pre heated metallic die. The alloy was then subjected to mechanical vibration for the process of grain refinement. The Machinability of aluminium alloy during continuous turning of composite rods using carbide tool inserts. The main focus of investigation is to determine Power consumption & Force. Experiments were conducted in the lathe dynamometer by using carbide insert at various parameters such as cutting speed, feed and depth of cut. The effect of machining parameters, e.g. cutting speed and depth of cut on the Power consumption & Force investigated during experimentation
Experimental Investigation of Effect of Tool Length on Surface Roughness duri...IOSR Journals
: In the turning operation, vibration is a frequent problem, which affects the result of the machining
and in particular the surface finish. Tool life is also influenced by vibrations. Severe acoustic noise in the
working environment frequently results as a dynamic motion between the cutting tool and the work piece. In all
cutting operations like turning, boring and milling vibrations are induced due to deformation of the work piece.
In the turning process, the importance of machining parameter choice is increased, as it controls the surface
quality required. Tool overhang is a cutting tool parameter that has not been investigated in as much detail as
some of the better known ones. It is appropriate to keep the tool overhang as short as possible; however, a
longer tool overhang may be required depending on the geometry of the work piece and when using the holeturning
process in particular. In this study, we investigate the effects of changes in the tool overhang in the
external turning process on both the surface quality of the work piece and tool wear. For this purpose, we used
work pieces of AISI 1050 material with diameters of 20, 30, and 40 mm; and the surface roughness of the work
piece were determined through experiments using constant cutting speed and feed rates with different depth of
cuts (DOCs) and tool overhangs. We observed that the effect of the DOC on the surface roughness is negligible,
but tool overhang is more important. The deflection of the cutting tool increases with tool overhang. Two
different analytical methods were compared to determine the dependence of tool deflection on the tool
overhang. Also, the real tool deflection values were determined using a comparator. We observed that the tool
deflection values were quite compatible with the tool deflection results obtained using the second analytical
method.
We have compiled the most important slides from each speaker's presentation. This year’s compilation, available for free, captures the key insights and contributions shared during the DfMAy 2024 conference.
Forklift Classes Overview by Intella PartsIntella Parts
Discover the different forklift classes and their specific applications. Learn how to choose the right forklift for your needs to ensure safety, efficiency, and compliance in your operations.
For more technical information, visit our website https://intellaparts.com
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
NO1 Uk best vashikaran specialist in delhi vashikaran baba near me online vas...Amil Baba Dawood bangali
Contact with Dawood Bhai Just call on +92322-6382012 and we'll help you. We'll solve all your problems within 12 to 24 hours and with 101% guarantee and with astrology systematic. If you want to take any personal or professional advice then also you can call us on +92322-6382012 , ONLINE LOVE PROBLEM & Other all types of Daily Life Problem's.Then CALL or WHATSAPP us on +92322-6382012 and Get all these problems solutions here by Amil Baba DAWOOD BANGALI
#vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore#blackmagicformarriage #aamilbaba #kalajadu #kalailam #taweez #wazifaexpert #jadumantar #vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore #blackmagicforlove #blackmagicformarriage #aamilbaba #kalajadu #kalailam #taweez #wazifaexpert #jadumantar #vashikaranspecialist #astrologer #palmistry #amliyaat #taweez #manpasandshadi #horoscope #spiritual #lovelife #lovespell #marriagespell#aamilbabainpakistan #amilbabainkarachi #powerfullblackmagicspell #kalajadumantarspecialist #realamilbaba #AmilbabainPakistan #astrologerincanada #astrologerindubai #lovespellsmaster #kalajaduspecialist #lovespellsthatwork #aamilbabainlahore #Amilbabainuk #amilbabainspain #amilbabaindubai #Amilbabainnorway #amilbabainkrachi #amilbabainlahore #amilbabaingujranwalan #amilbabainislamabad
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Understanding Inductive Bias in Machine LearningSUTEJAS
This presentation explores the concept of inductive bias in machine learning. It explains how algorithms come with built-in assumptions and preferences that guide the learning process. You'll learn about the different types of inductive bias and how they can impact the performance and generalizability of machine learning models.
The presentation also covers the positive and negative aspects of inductive bias, along with strategies for mitigating potential drawbacks. We'll explore examples of how bias manifests in algorithms like neural networks and decision trees.
By understanding inductive bias, you can gain valuable insights into how machine learning models work and make informed decisions when building and deploying them.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
2. LAB PRACTICAL LIST ME-II (3341901)
Prepared By NAP & VHH
LAB PRACTICAL LIST
Practical No. Aim of Practical
1 Preparatory Activity
2 Effect of Varying Cutting Parameters
3 Effect of Varying Work Piece Materials
4 Turning Job
5 Milling Job
6 Shaping and Drilling Job
7 Grinding Job
8 Tool Layout
9 Industrial Visit
S.B.PO
LYTEC
H
N
IC
3. EXPERIMENT NO. 1 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 1 of 2
EXPERIMENT NO. 1
AIM: - Preparatory Activity for Job on Lathe.
In This Experiment We Study about Lathe Machine Tools and its Geometry.
Lathe is the universal metal removal machine for round job. To understand total
manufacturing process on different types of machine, following terminology is must understand for
different machine.
Metal Removal Rate (MRR)
(A) Speed
When metal is cut, the work piece surface is driven with the respect to the
tool or the tool with respect to the surface, at a relatively high rate of speed. This is
called Cutting Speed or Speed. It is defined as the rate at which the uncut surface of
the work piece passes through the cutting edge of the tool. It is expressed in meter
per minute or surface meter per minute.
(B) Depth of Cut
Halt the amount of the diameter which is changed by cutting action in one
pass is called the depth of cut. It is measured in mm.
(C) Feed
Rate of which the tool is feed against work piece for cutting action is called
Feed. Feed is expressed in mm per revolution in turning operation. Feed determines
the time required for metal cutting operation.
The above terminology is show in different type of machine as following
(1) Turning & Boring Operation on Lathe. Show in Fig. 1.1
(2) Operation on Shaper Machine. Show in Fig. 1.2
(3) Operation on Planing Machine. Show in Fig. 1.3
(4) Operation on Milling Machine. Show in Fig. 1.4
(5) Operation on Grinding Machine. Show in Fig. 1.5
(6) Operation on Drilling Machine. Show in Fig. 1.6
(7) Operation on Broaching Machine. Show in Fig. 1.7
Metal Removal Rate (MRR)
The quantity of material removed from the job per second of minute is called MRR. It is
measured in mm3
/sec or m3
/minute
S.B.PO
LYTEC
H
N
IC
4. EXPERIMENT NO. 1 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 1A
(Fig, 1.1)
Turning & Boring Operation on Lathe
(Fig, 1.2) (Fig, 1.3)
Operation on Shaper Operation on Planing Machine
(Fig, 1.4) (Fig, 1.5)
Operation on Milling Operation on Grinding
(Fig, 1.6) (Fig, 1.7)
Operation on Drilling Machine Operation on Broaching Machine
S.B.PO
LYTEC
H
N
IC
5. EXPERIMENT NO. 1 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 2 of 2
MRR = 1000 mm3
/sec Where, v = Cutting Speed in mm/min
f = feed mm/ rev
d = depth of cut in mm
Tool Material & Tool Geometry for Lathe
Tool geometry and application for lathe machine is show in Fig. 1.8
Tool Property
Main property of cutting tool materials:
(1) Toughness (2) Wear Resistant (3) Red Hardness
Tool Material
Following are commonly used tool material.
(1) High Speed Steel (3) Cemented Carbides (5) Cemented Oxide
(2) Stelites (4) Ceramics (6) Diamond
ISO Classification of Carbide Tigs:
(a) P01, P10, 920, 930, 940, 950, - Ferrous Materials.
(b) M10, M20, M30, M40 – Intermediates.
(c) K01, K10, K20, K30, K40 – Cast Iron.
S.B.PO
LYTEC
H
N
IC
6. EXPERIMENT NO. 1 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 2A
(Fig, 1.8) Tool Geometry of Lathe machine
S.B.PO
LYTEC
H
N
IC
7. EXPERIMENT NO. 2 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 1 of 2
EXPERIMENT NO. 2
AIM: -To Study Effect of Varying Cutting Parameters.
We are study effect of Speed, Feed, and Depth of Cut on Tool Life and Surface Finish.
Influences of Cutting Variables
When any material is machined on lathe, milling, drilling, or shaping, it produced chips &
give particular finished surface.
Show Fig. 2.1
When we change cutting speed, depth of cut, feed it has effect on
(a) Power Consumption
(b) Accuracy
(c) Production Rate.
(d) Economy
(e) Surface Finish
(f) Tool Life
(a) Power Consumption
The product of cutting speed, feed and depth of cut is the metal removal rate. In
order to achieve higher metal removal rate V.d.f/power should be minimum. In other
words the power available for metal removal must be utilized at its best and without any
waste.
(b) Accuracy
Regarding the selection of cutting tool in order to maintain the standard of
quality the tool angle may be varied from positive to negative or the tool profile may be
suitably modified. The cost can be reduced, Selection optimum cutting speed according
to work piece tool combination.
(c) Production Rate
To increase the production rate, all variable factors such as speed, feed, and
depth of cut should be suitably optimized to increase the metal removal rate. Under
special circumstances if the production cost increases cutting tool with carbide tool bit,
ceramics or even diamond may be used to increase metal removal rate.
(d) Economy
When speed, feed rate and depth cut are increased, the production time is
decreased and production becomes economical.
S.B.PO
LYTEC
H
N
IC
8. EXPERIMENT NO. 2 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 1A
(Fig. 2.1)
(Fig. 2.2)
S.B.PO
LYTEC
H
N
IC
9. EXPERIMENT NO. 2 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 2 of 2
No. Parameter Effect on Tool Life Effect on Surface Finish
1.
2.
3.
Increase in Speed
Increase in Feed
Decrease in Depth of
Cut
Decrease in tool life
Decrease in tool life
Increase in tool life
Increase in surface finish
Decrease in surface finish
Increase in surface finish
Conclusion
(1) Increase in speed will give more production, good finish but decrease tool life.
(2) Increase in feed will give more production but decrease in surface finish & tool life.
(3) Increase in depth of cut will give more production but increase in power consumption,
decrease tool life & surface finish.
S.B.PO
LYTEC
H
N
IC
10. EXPERIMENT NO. 3 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 1 of 2
EXPERIMENT NO. 3
AIM:- To study about Interpret Surface Finish, Tool Life and Type of Chip Formation
on varying Cutting Parameters of Different Material.
We are study about effect of surface finish, tool life and type of chip formation on varying
cutting parameters of different material
Process of Chip Formation
When a tool cuts metal it is driven by a force necessary to overcome friction and the
forces that hold the metal together. The metal that the tool first meets is compressed and
caused to flow up the face of the tool. The pressure against the face of the tool and the
friction force opposing the metal flow build up to large amount. At that time the material
may be shared by the advancing tool or torn by the bending of the chip to start a crack.
Types of Chips
The Following variables are influence the type of chip.
(1) Properties of the material cut.
(2) Rake angle
(3) Cutting Speed
(4) Depth of Cut
(5) Feed Rate
(6) Type and quality of cutting fluid
Classification of Chips:
i. The Discontinuous or Segmental Chip.
ii. The Continuous or Ribbon Chip.
iii. The Continuous with Built Up Edge.
(i) The Discontinuous or Segmental Chip.
Factors for discontinuous chip:
(a) Brittle material or low ductility
(b) Low cutting speed
(c) Small rack angle
(ii) The Continuous or Ribbon Chip.
Factors for continuous chip
(a) Ductile materials.
(b) Large rack angle.
(c) Small depth of cut
(d) Sharp cutting edge
S.B.PO
LYTEC
H
N
IC
11. EXPERIMENT NO. 3 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 1A
(Fig. 3.1) Different Types of Chips
(Fig. 3.2)
S.B.PO
LYTEC
H
N
IC
12. EXPERIMENT NO. 3 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 2 of 2
(iii) The Continuous With Built Up Edge.
Factors for continuous chip with build-up edge
(a) Ductile Material.
(b) High feed.
(c) High depth of cut
(d) Improper cutting fluid
Varying Cutting Parameters of Different Material
A. MATERIAL – M.S
Take the M.S rod as a work piece and the hold the w/p on a lathe machine.
No. Spindle Speed in RPM Feed inch/rev Type of Chip Surface Finish
1. 240 0.285 Discontinuous Rough
2. 400 0.285 Discontinuous Fine
3. 575 0.285 Continuous Fine
B. MATERIAL – C.I
Take the C.I rod as a work piece and the hold the w/p on a lathe machine. Take the
sample turning operation on lathe m/c.
No. Spindle Speed in RPM Feed inch/rev Type of Chip Surface Finish
1. 240 0.285 Discontinuous Rough
2. 400 0.285 Discontinuous Fine
3. 575 0.285 Continuous Fine
C. MATERIAL – ALUMINIUM
Take the aluminium rod as a work piece and the hold the w/p and bolt cost on a lathe
machine
No. Spindle Speed in RPM Feed inch/rev Type of Chip Surface Finish
1. 240 0.285 Discontinuous Rough
2. 400 0.285 Discontinuous Fine
3. 575 0.285 Continuous Fine
S.B.PO
LYTEC
H
N
IC
13. EXPERIMENT NO. 4 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 1 of 8
EXPERIMENT NO. 4
AIM: - Preparation of Job on Lathe Machine.
To perform various lathe operations such as Plain turning, Taper turning, Threading,
Grooving, Chamfering and Knurling on a given material made of Mild steel.
Working Principle of Lathe Machine
The work piece is held in either chuck or between two centres and rotated. Suitable cutting
tool is held in tool post and by selecting suitable cutting parameters and with relative working
motions between work piece and cutting tool. Block Diagram of Lathe Machine Show in Fig. 4.1.
Machine Required
Lathe Machine
Specification of Lathe Machine Used for Making Job
(1) Height of the Centre: _______________
(2) Swing Diameter over Bed: _______________
(3) Length between Centres: _______________
(4) Swing Diameter over carriage: _______________
(5) Maximum bar Diameter: _______________
(6) Length of Bed: _______________
(7) Diameter of Spindle Nose: _______________
(8) Pitch of Lead Screw: _______________
(9) Capacity of Motor: _______________
Material Required
A mild steel bar of ____ mm diameter and ____ mm length
Tools & Equipment Used
(1) H.S.S. single point cutting tool,
(2) Parting tool,
(3) Grooving tool,
(4) Knurling tool,
(5) Threading tool,
(6) Chuckey,
(7) Tool post key,
(8) Outside calliper,
(9) Thread Gauge,
(10) Steel rule,
(11) Cutting Fluid.
S.B.PO
LYTEC
H
N
IC
14. EXPERIMENT NO. 4 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 1A
(Fig. 4.1) Block Diagram of Lathe
Tool Geometry
S.B.PO
LYTEC
H
N
IC
15. EXPERIMENT NO. 4 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 2 of 8
Drawing of the Job
Fig. No. 4.14
Operation Chart
Sr. No. Sequence of Operations Cutting Tool Used
1 Facing H.S.S Single Point Tool
2 Rough Turning H.S.S Single Point Tool
3 Finish Turning H.S.S Single Point Tool
4 Step Turning Parting Tool
5 Threading Threading Tool
6 Taper Turning H.S.S Single Point Tool
7 Grooving Grooving Tool
8 Knurling Knurling Tool
9 Chamfering H.S.S Single Point Tool
S.B.PO
LYTEC
H
N
IC
16. EXPERIMENT NO. 4 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 2A
Lathe Operation
(Fig. 4.2) Straight turning (Fig. 4.3) Taper Turning (Fig. 4.4) Profiling
(Fig. 4.5) Turning (Fig. 4.6) Facing (Fig. 4.7) Face Grooving
(Fig. 4.8) Form Tool (Fig. 4.9) Boring (Fig. 4.10) Drilling
(Fig. 4.11) Grooving (Fig. 4.12) Threading (Fig. 4.13) Knurling
S.B.PO
LYTEC
H
N
IC
17. EXPERIMENT NO. 4 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 3 of 8
Types of Operations
(1) Facing Operation
Facing is the operation of machining the ends of a piece of work to produce a flat
surface square with the axis. The operation involves feeding the tool perpendicular to the
axis of rotation of the work piece.
A regular turning tool may be used for facing a large work piece. The cutting edge
should be set at the same height as the centre of the work piece. The tool is brought into
work piece from around the centre for the desired depth of cut and then is fed outward,
generally by hand perpendicular to the axis of rotation of the work piece. Show Fig. No.
(2) Rough Turning Operation
Rough turning is the operation of removal of excess material from the work piece in
a minimum time by applying high rate of feed and heavy depth of cut. The depth of cut for
roughing operations in machining the work ranges from 2 to 5 mm and the rate of feed is
from 0.3 to 1.5 mm per revolution of the work.
(3) Finish Turning Operation
It requires high cutting speed, small feed, and a very small depth of cut to generate a
smooth surface. The depth of cut ranges from 0.5 to 1 mm and feed from 0.1 to 0.3 mm per
revolution of the work piece.
(4) Step Turning Operation
Is the operation of making different diameters of desired length? The diameters and
lengths are measured by means of outside calliper and steel rule respectively.
(5) Threading Operation
Principle of Thread Cutting
The principle of thread cutting is to produce a helical groove on a cylindrical
or conical surface by feeding the tool longitudinally when the job is revolved
between centres or by a chuck. The longitudinal feed should be equal to the pitch of
the thread to be cut per revolution of the work piece. The lead screw of the lathe,
through which the saddle receives its traversing motion, has a definite pitch. A
definite ratio between the longitudinal feed and rotation of the head stock spindle
should therefore be found out so that the relative speeds of rotation of the work and
the lead screw will result in the cutting of a screw of the desired pitch.
This is affected by change gears arranged between the spindle and the lead
screw or by the change gear mechanism or feed box used in a modern lathe.
S.B.PO
LYTEC
H
N
IC
18. EXPERIMENT NO. 4 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 4 of 8
Calculation of change-wheels, metric thread on English lead screw
To calculate the wheels required for cutting a screw of certain pitch, it is
necessary to know how the ratio is obtained and exactly where the driving and
driven wheels are to be placed. Suppose the pitch of a lead screw is 12 mm and it is
required to cut a screw of 3 mm pitch, then the lathe spindle must rotate 4 times the
speed of the lead screw that is
Spindle turn
Lead screw turn
= Means that we must have
Driver teeth
Driver teeth
= Since a small gear rotates faster than a larger
One with which it is connected.
Hence we may say,
Driver teeth
Driver teeth
=
Lead screw turn pitch of the screw to be cut
spindle turn pitch of the lead screw
In BRITISH SYSTEM
Driver teeth
Driver teeth
=
𝑇ℎ𝑟𝑒𝑎𝑑𝑠 𝑝𝑒𝑟 𝑖𝑛𝑐ℎ 𝑜𝑛 𝑙𝑒𝑎𝑑 𝑠𝑐𝑟𝑒𝑤
𝑇ℎ𝑟𝑒𝑎𝑑𝑠 𝑝𝑒𝑟 𝑖𝑛𝑐ℎ 𝑜𝑛 𝑤𝑜𝑟𝑘𝑤
Often engine lathes are equipped with a set of gears ranging from 20 to 120 teeth in
steps of 5 teeth and one translating gear of 127 teeth. The cutting of metric threads
on a lathe with an English pitch lead screw may be carried out by a translating gear
of 127 teeth.
Driver teeth
Driver teeth
=
5 𝑝 𝑛
127
Where,
P= pitch of the thread to be cut and
N=thread per inch on lead screw
𝐷𝑟𝑖𝑣𝑒𝑟 𝑡𝑒𝑒𝑡ℎ
𝐷𝑟𝑖𝑣𝑒𝑟 𝑡𝑒𝑒𝑡ℎ
=
pitch of the work
pitch of the lead screw
=
𝑝
(
1
𝑝
) 𝑋 (
127
5
)
=
5 𝑝 𝑛
127
Since, pitch =
1
No.of thread per inch
S.B.PO
LYTEC
H
N
IC
19. EXPERIMENT NO. 4 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 5 of 8
Thread Cutting Operation
In a thread cutting operation, the first step is to remove the excess material
from the work piece to make its diameter equal to the major diameter of the screw
thread. Change gears of correct size are then fitted to the end of the bed between
the spindle and the lead screw.
The shape or form of the thread depends on the shape of the cutting tool to
be used. In a metric thread, the included angle of the cutting edge should be ground
exactly 600. The top of the tool nose should be set at the same height as the centre
of the work piece. A thread tool gauge is usually used against the turned surface to
check the cutting tool, so that each face of the tool may be equally inclined to the
centre line of the work piece as shown.
The speed of the spindle is reduced by one half to one fourth of the speed
require for turning according to the type of the material being machined and the half
nut is then engaged. The depth of cut usually varies from 0.05 to 0.2 mm is given by
advancing the tool perpendicular to the axis of the work.
After the tool has produced a helical groove up to the desired length of the
work, the tool is quickly withdrawn by the use of the cross slide, the half-nut
disengaged and the tool is brought back to the starting position to give a fresh cut.
Before re-engaging the half-nut it is necessary to ensure that the tool will follow the
same path it has traversed in the previous cut, otherwise the job will be spoiled.
Several cuts are necessary before the full depth of thread is reached arising from this
comes the necessity to “pick-up” the thread which is accomplished by using a
chasing dial or thread indicator.
(6) Taper Turning Operation
A taper may be defined as a uniform increase or decrease in diameter of a piece of
work measured along its length. In a lathe, taper turning means to produce a conical surface
by gradual reduction in diameter from a cylindrical work piece. The amount of taper in a
work piece is usually specified by the ratio of the difference in diameters of the taper to its
length. This is termed as the iconicity designated by the letter ‘K’.
K =
(𝐷−𝑑)
𝐿
Where,
D= Large diameter of taper in mm
d= Small diameter of taper in mm
L= length of tapered part in mm
A taper may be turned by any one of the following methods:
(a) Form tool method,
(b) Tail stock set over method,
(c) Swivelling the compound rest and
(d) Taper turning attachment
S.B.PO
LYTEC
H
N
IC
20. EXPERIMENT NO. 4 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 6 of 8
Taper turning by swivelling the compound rest:
This method employs the principle of turning taper by rotating the work piece on the
lathe axis and feeding the tool at an angle to the axis of rotation of the work piece. The tool
mounted on the compound rest is attached to a circular base, graduated in degrees, which
may be swivelled and clamped at any desired angle. Once the compound rest is set at the
desired half taper angle, rotation of the compound slide screw will cause the tool to be fed
at that angle and generate a corresponding taper. The setting of the compound rest is done
by swivelling the rest at the half taper angle. This is calculated by the equation.
Tan α =
(𝐷−𝑑)
𝐿
Where,
α = Half taper angle
(7) Grooving Operation
Grooving is reducing work piece diameter across a very small length. In majority of
cases grooving is done after thread cutting is over or by the side of shoulders to provide
margin. In grooving, the work piece is rotated at half the turning speed and the grooving
tool is fed at right angle to work piece axis.
(8) Knurling Operation
Knurling is the process of embossing a diamond shaped pattern of the surface of a
work piece. The purpose of knurling is to provide an effective gripping surface on a work
piece to proven it from slipping when operated by hand. Knurling is performed by a special
knurling tool which consists of a set of hardened steel rollers in a holder with the teeth cut
on their surface in a definite pattern. The tool is held rigidly on the tool post and the rollers
are pressed against the revolving surface of work piece to squeeze the metal against the
multiple cutting edges, producing depressions in a regular pattern on the surface of the
work piece.
Knurling is done at the slowest speed and oil is flowed on the tool and work piece.
Knurling is done at the slowest speed and oil is flowed on the tool and work piece to
dissipate heat generated during knurling. The feed varies from 1 to 2 mm per revolution.
(9) Chamfering Operation
Chamfering is the operation of bevelling the extreme end of a work piece. This is
done to remove the burrs, to protect the end of the work piece from being damaged and to
have a better look. The operation may be performed after the completion of all operations.
It is an essential operation after thread cutting so that the nut may pass freely on the
threaded work piece.
S.B.PO
LYTEC
H
N
IC
21. EXPERIMENT NO. 4 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 7 of 8
Metal Cutting Parameters
The cutting speed of a tool is the speed at which the metal is removed by the tool from the
work piece. In a lathe, it is the peripheral speed of the work past the cutting tool expressed in
meters/minute
I. Cutting speed (V) =
𝝅 𝑫 𝑵
𝟏𝟎𝟎𝟎
m/min Where,
D= Diameter of the work in mm
N= RPM of the work
II. Feed
The feed of a cutting tool in a Lathe work is the distance the tool advances for
each revolution of the work. Feed is expressed in mm/rev.
III. Depth of Cut
The depth is the perpendicular distance measured from the machined
surface to the uncut surface of the work piece.
Depth of Cut =
(𝐷1−𝐷2)
2
Where,
D1= Diameter of the work surface before machining
D2= Diameter of the work surface after machining
While using HSS tool for turning mild steel work piece. The following parameters are to be chosen.
IV. Rough Turning Operation
Cutting speed (V) = 25m/min,
Feed (f) = 0.2 mm/rev,
Depth of cut (t) = 1 mm
V. Finish Turning Operation
Cutting speed (V) = 40m/min,
Feed (f) = 0.1 mm/rev,
Depth of cut (t) = 0.2 mm
VI. Tool Geometry
Back rake angle = 7°,
End relief angle = 6°,
Side relief angle = 6°,
End cutting edge angle = 15°,
S.B.PO
LYTEC
H
N
IC
22. EXPERIMENT NO. 4 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 8 of 8
Side cutting edge angle = 15°,
Nose radius = 2 mm
Procedure
1) The work piece and HSS single point cutting tool are securely held in the chuck and tool post
respectively.
2) Operations such as facing, rough turning and finish turning are performed on a given mild
steel bar one after the other in sequence up to the dimensions shown. Then the step
turning is performed using parting tool.
3) HSS single point cutting tool is replaced by a threading tool. Right hand and left hand metric
threads are cut on the work piece up to the required length at 1/4th of the normal speed of
the spindle.
4) Then the compound rest is swivelled by calculated half taper angle and taper is generated
on the work piece. Rotation of the compound slide screw will cause the tool to be fed at the
half-taper angle.
5) HSS single point cutting tool is replaced by the Grooving tool and Grooving operation is
performed at half of the normal spindle speed.
6) HSS single point cutting tool is replaced by the Knurling tool and knurling operation is
performed at the slowest speed of the spindle.
7) After, the chamfering is done at the end of the work piece.
8) Finally, the work piece is removed from the chuck. Work piece is ready.
Precautions
1) Operate the machine at optimal speeds.
2) Do not take depth of cut more than 2 mm.
3) Knurling should be done at slow speeds and apply lubricating oil while knurling
4) Care should be taken to obtain the required accuracy
Result
Required specimen obtained according to specified operations (plane turning, tapper turning,
threading. Knurling and chamfering) with given dimensions.
S.B.PO
LYTEC
H
N
IC
23. EXPERIMENT NO. 5 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 1 of 3
EXPERIMENT NO. 5
AIM: - Preparation of Job on Milling Machine.
To perform plane milling operation on the given specimen (mild steel) & get to its correct
dimensions.
Working Principle of Milling Machine
The working principle, employed in the metal removing operation on a milling machine, is
that the work is rigidly clamped on the table of the machine, or held between centres, and
multiteeth cutter mounted either on a spindle or on arbor. Revolves at a fairly high speed and the
work fed slowly past the cutter. Block Diagram of Milling Machine Show in Fig. 5.1.
Machine Required
Milling Machine
Specification of Milling Machine Used for Making Job
The milling machine is specified by its table working surface, its longitudinal, cross and
vertical transverse, knee movement in degrees, range and number of spindle speeds, available
power of the machine and machine type.
Material Required
Mild Steel Specimen.
Tools & Equipment Used
(1) Plane (Face) Milling Cutter,
(2) Vernier Calipers,
(3) Steel rule,
(4) Scriber,
(5) Work Holding Fixtures: Work Piece Supporting Fixtures,
(6) Miscellaneous Tools: Hammer, Brush, Allen keys,
(7) Cutting Fluid (If needed).
Theory
Milling machine is a machine tool in which metal is removed by means of a revolving cutter
with many teeth (multipoint), each tooth having a cutting edge which removes the metal from the
work piece. The work may be fed to the cutter, longitudinally, transversely or vertically, the cutter
is set to a certain depth of cut by raising the table. This machine is very much suitable in tool room
work due to its variety of operations, better surface finish and accuracy.
S.B.PO
LYTEC
H
N
IC
24. EXPERIMENT NO. 5 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 1A
(Fig. 5.1) Block Diagram of Milling Machine
S.B.PO
LYTEC
H
N
IC
25. EXPERIMENT NO. 5 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 2 of 3
Drawing of the Job
Fig. 5.10
Sequence of Operation
I. Measuring of specimen
II. Fixing of specimen in the milling m/c.
III. Giving the correct depth and automatic feed cut the specimen
IV. Check the specimen with Vernier caliper at the end.
S.B.PO
LYTEC
H
N
IC
26. EXPERIMENT NO. 5 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 2A
(Fig. 5.2) Plain Milling Operation (Fig. 5.3) Face Milling Operation
(Fig. 5.4) Gang Milling Operation (Fig. 5.5) Form Milling Operation
(Fig. 5.6) Angular Milling Operation
(Fig. 5.7) Woodruff Keyway Milling Operation
S.B.PO
LYTEC
H
N
IC
27. EXPERIMENT NO. 5 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 3 of 3
Procedure
1) The dimensions of the given job are checked with the steel rule.
2) The given job is fixed in the vice provided on the machine table such a, one end of it is
projected outside the jaws of the vice.
3) A face milling cutter is mounted on the horizontal milling machine spindle and one end of
the job is face milled, by raising the table so that the end of the job faces the cutter.
4) The job is removed from the vice and fitted in the reverse position.
5) The other end of job is face milled such that, the length of the job is exactly 100 mm.
6) The table is lowered and the job is removed from the vice and refitted in it such that, the
top face of the job is projected from the vice jaws.
7) The face milling cutter is removed from the spindle and the arbor is mounted in the spindle;
followed by fixing the plain milling cutter.
8) The top surface of the job is slab milled; first giving rough cuts followed by a finish cut.
9) The job is removed from the vice and refitted in it such that, the face opposite to the above,
comes to the top and projects above the vice jaws.
10) The top surface of the job is milled in stages; giving finish cuts towards the end such that,
the height of the job is exactly 40 mm.
11) The burrs if any along the edges are removed with the help of the flat file.
Precautions
1) The milling machine must be stopped before setting up or removing a work piece, cutter or
other accessory
2) Never stop the feeding of job when the cutting operation is going on, otherwise the tool will
cut deeper at the point where feed is stopped.
3) All the chips should be removed from the cutter. A wiping cloth should be placed on the
cutter to protect the hands. The cutter should be rotated in the clockwise direction only for
right handed tools.
4) The work piece and cutter should be kept as cool as possible (i.e. coolant should be used
where necessary to minimize heat absorption).
5) The table surface should be protected with a wiping cloth.
6) Tool must be mounted as close to the machine spindle as possible.
Result
The rectangular block of 50 x 40 x 100 mm, is thus obtained, by the stages described above.
S.B.PO
LYTEC
H
N
IC
28. EXPERIMENT NO. 5 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 3A
(Fig. 5.8) Work Piece Holding Devices (Vise)
(Fig. 5.9) Various Mounting Work piece
S.B.PO
LYTEC
H
N
IC
29. EXPERIMENT NO. 6 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 1 of 4
EXPERIMENT NO. 6
AIM: - Preparation of Job on Shaping Machine & Drilling Machine.
Shaping Machine
To perform V and Dovetail machining & U-cut on the given work piece.
Working Principle of Shaping Machine
A shaper has a reciprocating ram that carries a cutting tool. The tool cuts only on the
forward stroke of the ram. The work is held in a Vise or on the worktable, which moves at a right
angle to the line of motion of the ram, permitting the cuts to progress across the surface being
machined. Block Diagram of Milling Machine Show in Fig. 6.1.
Machine Required
Shaper Machine.
Specification of Shaping Machine Used for Making Job
A shaper is identified by the maximum size of a cube it can machine; thus, a 24-inch shaper
will machine a 24-inch cube.
(1) Maximum ram stroke ________ mm
(2) Work table surface (Width: ________mm) (Length: ________mm)
(3) No. of stroke per min ________ st/min
(4) Motor power ________ KW
Material Required
Mild steel / Cast iron / Cast Aluminium.
Tools & Equipment Used
(1) H.S.S tool bit,
(2) V tool,
(3) Plain tool,
(4) Grooving tool.
(5) Vernier calipers,
(6) Vernier height gauge,
(7) Dial indicator,
(8) Required steel ball.
Theory
The shaper also called shaping machine, is a reciprocating type of machine tool in which the
ram moves the cutting tool backward and forward in a straight line to generate the flat surface. The
flat surface may be horizontal, inclined or vertical.
S.B.PO
LYTEC
H
N
IC
30. EXPERIMENT NO. 6 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 1A
(Fig. 6.1) Block Diagram of Shaper Machine
(Fig. 6.2) Block Diagram of Drilling Machine
S.B.PO
LYTEC
H
N
IC
31. EXPERIMENT NO. 6 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 2 of 4
Drawing of the Job
Fig. 6.3
Sequence of Operation
I. Measuring of specimen.
II. Fixing of specimen in the machine vice of the shaping machine.
III. Giving the correct depth and automatic feed for the slot is to be made.
IV. Check the slot with the Vernier calipers & precision measurement by slip gauges at the end.
S.B.PO
LYTEC
H
N
IC
32. EXPERIMENT NO. 6 ME-II (3341906)
Prepared By NAP & VHH Page 2A
(Fig. 6.4) Tool head assembly position in various operation
(Fig. 6.5) Quick Return Mechanism
S.B.PO
LYTEC
H
N
IC
33. EXPERIMENT NO. 6 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 3 of 4
Principle of Quick return motion
These types of machine tool are of rectilinear cutting motion therefore, the rotary motion of the
drive is converted into reciprocating motion.
The metal is removed in the forward cutting stroke, while the return stroke goes idle and no metal
is removed during this period.
The cutting mechanism is so designed that it moves at a comparatively slower speed during
forward cutting stroke, whereas during the return stroke it allow the ram to move at a faster speed
to reduce the idle return time.
This mechanism is known as quick return mechanism. Show in Fig. 6.4
Hence we may say,
Cutting Ratio = =
= =
The length of the stroke is reduced the crank return action (inverse proportional)
Procedure
1) The dimensions of the given job are checked with the steel rule.
2) The given job is fixed in the vice provided on the machine table such a, one end of it is
projected outside the jaws of the vice.
3) A tool is mounted on the tool holder of shaper machine.
4) Machine power start and interval of after some times check surface finishing.
5) After many stroke and times the job is ready.
Precautions
1) The shaping machine must be stopped before setting up or removing the work piece
2) All the chips should be removed from the cutter.
Result
Required specimen obtained according to specified operations (shaping and grooving operations)
with given dimensions.
S.B.PO
LYTEC
H
N
IC
34. EXPERIMENT NO. 6 ME-II (3341906)
Prepared By NAP & VHH Page 3A
(Fig. 6.6) Drilling (Fig. 6.7) Reaming (Fig. 6.8) Boring
(Fig. 6.9) Counter boring (Fig. 6.9) Counter shinking (Fig. 6.9) Spot facing
(Fig. 6.10) Tapping (Fig. 6.11) Trepanning
S.B.PO
LYTEC
H
N
IC
35. EXPERIMENT NO. 6 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 4 of 4
Drilling Machine
To perform drill operation and create throughout hole on given work piece. .
Working Principle of Drilling Machine
The rotating edge of the drill exerts a large force on the work piece and the hole is
generated. The removal of metal in a drilling operation is by shearing and extrusion Block Diagram
of Milling Machine Show in Fig. 6.2.
Machine Required
Radial Drilling Machine.
Specification of Drilling Machine Used for Making Job
(1) Capacity of Machine __________ mm diameter hole
(2) Spindle speed range __________ R.P.M.
(3) Feed Range __________ mm per revolution
(4) Number of Spindle Speed __________
Material Required
Mild steel specimen, coolant (oil and water mixture), lubricant oil
Tools & Equipment Used
(1) Button pattern stock,
(2) Drill bids,
(3) Vernier calipers,
(4) MARKING TOOLS : Dot punch,
(5) Work holding fixtures: Bench vice, V-Block,
(6) Miscellaneous tools: Brush, Allen Keys.
Procedure
1) Set required diameter tool on drilling spindle.
2) After complete shaping operation set work piece on drilling machine.
3) Mark the centre of hole and centre punching.
4) Start power and give feed and complete drilling operation.
Precautions
1) Coolant has to be sued while drilling.
2) Lubricating oil has to be used to get smooth finish while tapping.
Result
Required specimen obtained according to specified operations (drilling operations) with given
dimensions.
S.B.PO
LYTEC
H
N
IC
36. EXPERIMENT NO. 7 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 1 of 2
EXPERIMENT NO. 7
AIM: - Preparation of Job on Grinding Machine.
Grind a single point cutting tool as per given tool signature / nomenclature..
Machine Required
Surface Grinding Machine.
Material Required
H.S.S. square bar: 15 mm Width, 150 mm Length, 15 mm Thick
Tools & Equipment Used
(1) Gauge
(2) Vernier calipers
(3) Micrometre
(4) CUTTING TOOLS: Diamond point dressing block
(5) WORK HOLDING FIXTURES: Magnetic chuck
(6) Wire brush (for cleaning the formed chips)
(7) Lubricant(coolant)
(8) Required steel ball.
Procedure
1) Before grinding operation, check the condition and availability of following.
A. The protection screen
B. Tool rest
C. The grinding wheels
D. The bath (containing coolant liquid)
E. The exhaust fan
F. Start-stop push buttons.
2) Always observe safety
3) Use the vernier bevel protector for measuring tool angle.
4) Grind the carbide-tipped right hand shank tool on the main flank.
5) Stop the grinding wheel and measure the clearance angle.
6) Grind the tool’s auxiliary flank.
7) Measure the tool angle.
8) Grind the face of the tool.
9) Check the accuracy of the rake angle by the lip angle.
10) Grind the main and auxiliary flanks.
11) Grind the land of the main flank.
12) Grind the land with respect to the face.
13) Round off the tool nose.
14) Make a slope angle of the cutting edge with respect to the tool nose.
S.B.PO
LYTEC
H
N
IC
37. EXPERIMENT NO. 7 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 1A
(Fig. 7.1) Cutting Tool Geometry
S.B.PO
LYTEC
H
N
IC
38. EXPERIMENT NO. 7 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 2 of 2
15) Tool grinding machine with diamond and abrasive wheels.
16) Dress the land and the nose point of the tool.
17) Lap the rough ground carbide tipped tools.
Precautions
1) Coolant usage is compulsory as the speeds employed are very high and continuous
application of coolant is necessary for ductile materials like steel etc.
2) The grinding tools are first dressed properly.
3) Care has to be taken so as to maintain the right feed of the material.
4) Work-wheel interface zone is to be flooded with coolant
5) Dressing of grinding wheel to be done before commencement of cutting action, intermittent
dressing also to be done if wheel is loaded
Result
Required specimen obtained according to specified operations(surface grinding operation) with
given dimensions
S.B.PO
LYTEC
H
N
IC
39. EXPERIMENT NO. 8 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 1 of 1
EXPERIMENT NO. 8
AIM: - Prepare a tool layout of a given component for capstan and turret lathe.
To prepare a tooling layout on capstan and turret lathe
Machine Required :- Capstan and Turret Lathe
Material Required :- Mild steel round bar 40 mm diameter and 60 mm length
Tools & Equipment Used
(1) Collet chuck
(2) Various tools and tool holder
(3) Micrometre
(4) Varnir calipers
(5) Wire brush (for cleaning the formed chips)
(6) Lubricant(coolant)
Procedure for prepare Tool Layout
1) List the operation to be performed to complete the component from the given work
material.
2) Sequence the operations and combine where ever possible.
3) Select suitable tool holder and tool for each operation. Prepare operation sheet.
4) Prepare line sketch of each operation.
5) Prepare complete tooling layout on hexagonal turret and square turret.
6) Select the proper spindle speed, feed and depth of cut for each operation.
7) Set the work and tools on machine according to planned chart.
Example for prepare Tool Layout
Draw the tool layout for the components shown in Fig. 8.1
Fig. 8.2 shows the tool layout. And the operation sequence is given below.
1) Feed the bar stock to combined stock stop and start drill. Close the collet. The end of bar is
then centred by advancing the start towards it-turret.
2) Drill the internal diameter-turret.
3) The thread diameter is bored to correct size, boring bar in a slide tool-turret.
4) Ream the drilled hole, reamer-turret.
5) Make the recess, slide tool-turret.
6) Cut the internal threads, tap-turret.
7) Cut-off, parting tool rear cross slid.
Result
Required Tool Layout is Ready.
S.B.PO
LYTEC
H
N
IC
40. EXPERIMENT NO. 8 S.B. POLYTECHNIC, SAVLI ME-II (3341901)
Prepared By NAP & VHH Page 1A
(Fig. 8.1) Component Drawing
(Fig. 8.2) Tool Layout
S.B.PO
LYTEC
H
N
IC