The document discusses different types of turning fixtures and mandrels used to securely hold workpieces for machining operations on lathes. Turning fixtures are cheaper than milling and allow for asymmetric jobs to be machined. Fixtures must be carefully designed for operator safety, accuracy, and proper clamping to the faceplate. Mandrels are used internally to locate cylindrical workpieces and come in tapered, clamping, expanding, and threaded varieties to suit a range of bore sizes and provide accurate concentricity.
This chapter aims to provide basic backgrounds of different types of machining processes and highlights on an understanding of important parameters which affects machining of metals with their chip removals.
Metal cutting or Machining is the process of producing workpiece by removing unwanted material from a block of metal. in the form of chips. This process is most important since almost all the products get their final shape and size by metal removal. either directly or indirectly.
The major drawback of the process is loss of material in the form of chips. In this chapter. we shall have a fundamental understanding of the basic metal process.
This chapter aims to provide basic backgrounds of different types of machining processes and highlights on an understanding of important parameters which affects machining of metals with their chip removals.
Metal cutting or Machining is the process of producing workpiece by removing unwanted material from a block of metal. in the form of chips. This process is most important since almost all the products get their final shape and size by metal removal. either directly or indirectly.
The major drawback of the process is loss of material in the form of chips. In this chapter. we shall have a fundamental understanding of the basic metal process.
What does clamping mean in context of jigs and fixtures?
Principles of Clamping
Different types of Clamping Devices, their advantaged and disadvantages
Unit 2 Machinability, Cutting Fluids, Tool Life & Wear, Tool MaterialsMechbytes
Concept of machinability, machinability index, factors affecting machinability
Different mechanism of tool wear types of tool wear (crater, flank etc.), Measurement and control of tool wear
Concept of tool life, Taylor's tool life equation (including modified version)
Different tool materials and their applications including effect of tool coating
Introduction to economics of machining
Cutting fluids: types, properties, selection and application methods
What does clamping mean in context of jigs and fixtures?
Principles of Clamping
Different types of Clamping Devices, their advantaged and disadvantages
Unit 2 Machinability, Cutting Fluids, Tool Life & Wear, Tool MaterialsMechbytes
Concept of machinability, machinability index, factors affecting machinability
Different mechanism of tool wear types of tool wear (crater, flank etc.), Measurement and control of tool wear
Concept of tool life, Taylor's tool life equation (including modified version)
Different tool materials and their applications including effect of tool coating
Introduction to economics of machining
Cutting fluids: types, properties, selection and application methods
The use of jigs and fixtures within manufacturing is widely employed. Their design and the parameters to be taken in to account are discussed with the aid of a case study.
Machining Automation and Integration to the MaxMakino
This presentation on “Machining Automation and Integration to the Max” has been adapted from Makino’s webinar series. To view the full webinar, visit http://www.makino.com/resources/webinars/archive/automation-and-integration-machining-to-the-max/319/
Machining automation is a proven method for reducing manufacturing costs, eliminating non-value added labor, improving quality, increasing equipment flexibility and growing throughput. This presentation discusses the fundamentals of machining automation, key activities performed during implementation, and the technologies involved to complete a successful automated system. An emphasis on project management and engineering is discussed, providing insights for successful installation of machining centers, software and the manufacturing processes that drive North American manufacturing success. The discussion concludes with a series of real-world case studies from shops that have successfully integrated machining automation to lower their overall cost of manufacturing.
Nagabonar (Deddy Mizwar) sudah memiliki perkebunan luas kelapa sawit. Sementara istri, Ibu, dan sahabat karibnya sudah meninggal dan dikubur di perkebunan itu juga. Suatu hari ia diminta anaknya, Bonaga (Tora Sudiro) yang lulusan S2 luar negeri dan sudah jadi pengusaha properti, untuk datang ke Jakarta. Begitu sampai di Jakarta, mulailah komedi berlangsung.
Yang jadi bahan kali ini adalah membenturkan nilai-nilai lama, khususnya nasionalisme zaman 45, dengan kondisi sosial-politik-ekonomi Indonesia 2007 yang penuh kepincangan dan korupsi. Bonaga dan kawan-kawan ingin mengubah perkebunan kelapa sawit Nagabonar menjadi resort mewah, bekerjasama dengan Jepang.
Nagabonar marah dan frustrasi. Ia keliling Jakarta untuk melampiaskan kekesalannya. Semakin banyak kepincangan yang dilihatnya, tapi juga ia menyadari sudah terjadi perubahan besar. Ia tidak bisa menerima keadaan, tapi juga sangat cinta pada anak tunggalnya itu dan mencoba memahaminya. Bahkan dengan naifnya ia mengajari anaknya bagaimana merayu pacarnya Monita (Wulan Guritno). Bonaga sendiri lambat laun bisa memahami posisi moral bapaknya. Komedi terbaik dalam 10 tahun terakhir.
With an ever increasing number of applications demanding more from less, the Unasis split thin section range of bearings aims to bridge the gap providing a highly capable bearing in applications with restricted mass, cost and size. Applicable to all most all industries imaginable, the table below offers just a snapshot of the some industries where Unasis bearings can be successfully implemented. For More Information please Visit: http://www.carterbearings.co.uk/pdfs/Unasis_Thin_Section_Bearings.pdf
Robotic welding requires specialized fixtures to ac curately hold the work piece during the welding operation. Despite the large variety of welding fix tures available today the focus has shifted in maki ng the welding arms more versatile,not the fixture. T he new fixture design reduces cycle time and operat or labor while increasing functionality;and allows co mplex welding operations to be completed on simple two axis welding arms
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.
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COLLEGE BUS MANAGEMENT SYSTEM PROJECT REPORT.pdfKamal Acharya
The College Bus Management system is completely developed by Visual Basic .NET Version. The application is connect with most secured database language MS SQL Server. The application is develop by using best combination of front-end and back-end languages. The application is totally design like flat user interface. This flat user interface is more attractive user interface in 2017. The application is gives more important to the system functionality. The application is to manage the student’s details, driver’s details, bus details, bus route details, bus fees details and more. The application has only one unit for admin. The admin can manage the entire application. The admin can login into the application by using username and password of the admin. The application is develop for big and small colleges. It is more user friendly for non-computer person. Even they can easily learn how to manage the application within hours. The application is more secure by the admin. The system will give an effective output for the VB.Net and SQL Server given as input to the system. The compiled java program given as input to the system, after scanning the program will generate different reports. The application generates the report for users. The admin can view and download the report of the data. The application deliver the excel format reports. Because, excel formatted reports is very easy to understand the income and expense of the college bus. This application is mainly develop for windows operating system users. In 2017, 73% of people enterprises are using windows operating system. So the application will easily install for all the windows operating system users. The application-developed size is very low. The application consumes very low space in disk. Therefore, the user can allocate very minimum local disk space for this application.
Event Management System Vb Net Project Report.pdfKamal Acharya
In present era, the scopes of information technology growing with a very fast .We do not see any are untouched from this industry. The scope of information technology has become wider includes: Business and industry. Household Business, Communication, Education, Entertainment, Science, Medicine, Engineering, Distance Learning, Weather Forecasting. Carrier Searching and so on.
My project named “Event Management System” is software that store and maintained all events coordinated in college. It also helpful to print related reports. My project will help to record the events coordinated by faculties with their Name, Event subject, date & details in an efficient & effective ways.
In my system we have to make a system by which a user can record all events coordinated by a particular faculty. In our proposed system some more featured are added which differs it from the existing system such as security.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Vaccine management system project report documentation..pdfKamal Acharya
The Division of Vaccine and Immunization is facing increasing difficulty monitoring vaccines and other commodities distribution once they have been distributed from the national stores. With the introduction of new vaccines, more challenges have been anticipated with this additions posing serious threat to the already over strained vaccine supply chain system in Kenya.
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
2. TURNING FIXTURES
COMPONENTS PRODUCED ON LATHE ARE
CHEAPER DUE TO LESS MACHINE HOUR
RATE COMPARED TO COSTLY MILLING
MACHINE AND COSTLY MILLING CUTTER
INSERTS.
AVAILABILITY OF LATHE IS MORE COMMON
COMPARED TO MILLING MACHINES.
ASYMETRICAL JOBS CAN BE LOCATED
USING A FIXTURE WHICH CAN BE DRILLED,
TURNED, BORED, REAMED, ON LATHE BY
USING SPECIALLY DESIGNED FIXTURE.
3. SOME OF THE DESIGN CONSIDERATIONS INTURNING
FIXTURES
WHILE DESIGNING THE TURNING FIXTURES
UTMOST CARE SHOULD BE TAKEN TO
AVOID PROJECTIONS FOR THE
OPERATOR’S SAFETY
THE ACCURACY OF THE MACHINE TOOL
MUST BE PROTECTED BY PLACING
NECESSARY BALANCE WEIGHTS IN THE
FIXTURE
4. SOME OF THE DESIGN CONSIDERATIONS
INTURNING FIXTURES
THE OVERHANG OF THE FIXTURE SHOULD
BE MINIMUM
THE FIXTURE MUST BE PROPERLY
LOCATED ON THE FACE PLATE
THE FIXTURE MUST BE DESIGNED
CONSIDERING THE STANDARD SLOTS
AVAILABLE IN FACE PLATE FOR CLAMPING
THE FIXTURE.
5.
6. WHY & WHEN FACE PLATE IS USED
FACE PLATE IS ACCURATELY TURNED AND
LOCATED TO FIT THE NOSE OF THE MAIN SPINDLE.
THE TAPER ON SPINDLE AND TAPER ON THE BORE
OF THE FACE PLATE MATCHES EXACTLY.
ASSYMETRICAL WORK PIECES CAN BE MACHINED
USING A FACE PLATE.
TIME REQUIRED TO SET THE WORK IS
ENORMOUS,LABORIOUS AND LESS SAFE. THIS
MAY LEAD THE REJECTION OF WORK PIECE.
IT IS THEREFORE HIGHLY ADVISABLE TO GO FOR A
FIXTURE, IF WE CAN JUSTIFY THE COST.
7. LATHE FIXTURES
THE DESIGNED FIXTURE CAN BE LOCATED
ON A FACE PLATE.
THE FIXTURE MUST BE CLAMPED TO THE
FACE PLATE SUITABLY.
THE FIXTURE WEIGHT MUST BE AS
MINIMUM AS POSSIBLE AND DESIGN
SHOULD TAKE CUTTING FORCES EXERTED
BY THE TOOL.
8. GENERAL POINTS FOR A LATHE FIXTURE
GRIP THE ROTATING WORKPIECE SECURELY TO
THE FIXTURE TO RESIST TORSIONAL FORCES.
THE FIXTURE SHOULD BE RIGID AND OVERHANG
SHOULD BE MINIMUM POSSIBLE
CLAMPING SCREW SIZE SHOULD BE CAREFULLY
SELECTED TO RESIST THE CUTTING TORQUE.
LOCATE THE WORKPIECE ON CRITICAL SURFACES
FROM WHERE ALL OR MAJOR AND ANGULAR
TOLERANCES ARE TAKEN.
9. GENERAL POINTS FOR A LATHE FIXTURE
PROVIDE ADEQUATE SUPPORT FOR FRAIL
SECTION OR SECTIONS UNDER PRESSURE FROM
LATHE TOOLS.
FIXTURE SHOULD BE ACCURATELY BALANCED TO
AVOID VIBRATIONS AT HIGH SPINDLE SPEEDS.
PILOT BUSHING FOR SUPPORTING TOOLS SHOULD
BE PROVIDED WHERE EXTREME ACCURACY IS
REQUIRED IN BORING OPERATIONS
REDUCE TIME REQUIRED FOR LOADING AND
UNLOADING TO JUSTIFY REDUCED TOTAL COST
PER COMPONENT, FOR THE QUANTITY TO BE
PRODUCED
10. HORIZONTAL BORING MACHINES
HORIZONTAL BORING MACHINES CAN
ALSO BE USED AS MILLING, DRILLING
AND TAPPING MACHINES.
THEY ARE LIMITED TO LOW TO
MEDIUM SIZE RUNS.
11. CHARACTERISTICS OF A HBMS
WORK PIECE /JOB IS KEPT ON MACHINE TABLE BY USING A
FIXTURE(WORK HOLDING FIXTURE OR BY DIALLING THE
WORK PIECE). NEVER FORGET TO DIAL THE JOB AFTER
CLAMPING TO ENSURE THAT THERE IS NO SHIFT IN
CLAMPING.
HORIZONTAL SPINDLES THAT ROTATE THE CUTTING TOOLS.
POWER FEED OF THE SPINDLE TO ADVANCE CUTTING
TOOLS INTO THE WORKPIECES.
POWER FEED RELATIVE MOTION BETWEEN SPINDLE AND
WORKPIECE
POWER SADDLE FEED PARALLEL TO THE SPINDLE AXIS.
21. EXTERNAL LOCATORS
COLLETS ARE EXTENSIVELY USED TO
LOCATE THE CUTTING TOOLS VERY
ACCURATELY IN MILLING / LATHE /
COLLETS ARE MADE OF SPRING
STEEL
THE VARIATION OF THE CUTTING
TOOL SHOULD NOT BE TOO HIGH
( USUALLY THE TOLERANCE CUTTING
TOOL IS h6 / h8)
22. TYPES OF COLLETS
Push-out collets
Pull-in collets
Dead length collets
31. These are tapered bars with centre at the
ends for aligning with the machine axis and
a flat for fixing the drive carrier.
Taper generally ranges from 0.4 to 0.5 mm
per meter.
This limits the variation in the bore of the
work pieces and so, for wide difference in
the bores, different mandrels must be used.
The taper facilitates friction drive for the
work piece, which is generally pressed on the
mandrel with an arbor press.
32. For repeated use, the mandrels should be
hardened and the centers protected by
counter bores to prevent damage due to
accidental fall.
Tapered mandrels are rarely used in mass
production as they require longer work
piece loading and unloading time.
34. These are extensively used for grinding
outside diameter of bushes.
The locating diameter must be close push fit
with the minimum size of the work piece bore.
Consequently, the maximum bore size work
piece would be loose on the mandrel by the
amount equal to the work piece tolerance.
Thus, the possible concentricity b/w the
inside and outside diameter of the work piece
would be equal to the tolerance on the bore of
the work piece.
35. The work piece is clamped axially with a C
washer and a hexagonal nut which permit
quick loading and unloading.
The drive pin serves as an integral drive
carrier. The mandrel is provided with
protected centres and is hardened to minimise
wear on the locating diameter.
37. For a high degree of concentricity expanding
mandrels should be used.
These permit adjustment of the locating
diameter to suit the variation in the bore size of
the work piece.
In fact, expanding mandrels clamp the work
piece on the bore as collet grips the stock on
the outside diameter.
Consequently there is no clearance between the
mandrel and the work piece which explains the
high degree of concentricity .
38. The mandrel is split in to three or four pieces and
are held against the expanding cone by a retainer
spring, the clockwise rotation of the cone pushes the
mandrel pieces outwards against the work piece to
locate and clamp it.
The rotation of the cone in the opposite direction
reduces the distance b/w the mandrel pieces which are
pressed inwards by the retainer spring.
this contracts the mandrel to provide clearance b/w
the mandrel and work piece for easy loading and
unloading.
40. For work pieces with internal threads, the locating
mandrel should have a clamping collar which has
internal threads in the direction opposite to the
thread in the work piece. these facilitate tightening
of the work piece and the clamping collar against each
other ,and prevents the collar from unscrewing during
turning operation. for unclamping the work piece, lug
on the clamping collar is knocked in an anti-clockwise
direction by a hammer.