Project Report on flexible drill machine

FLEXIBLE DRILL MACHINE
Zeal Polytechnic Department of Mechanical Engineering PageI
PROJECT REPORT
On
“FLEXIBLE DRILLING MACHINE”
Submitted By
1) MR.OMKAR A. MOHOL
2) MR. DHAIRYASHIL S. PAWAR
3) MR. MOHIT S. SINGH
4) MR. DATTA V. PASALKAR
Guide
Prof. A.S.PATIL
Department of Mechanical Engineering
ZES’s
Zeal Polytechnic
[2017-18]

Zeal Polytechnic Department of Mechanical Engineering PageII
APPROVAL SHEET
A Project entitled “Flexible Drilling Machine” submitted by Mr. Omkar Mohol
Mr. Mohit Singh, Mr.Datta Pasalkar, Mr.Dhairyashil Pawar is approved for
diploma of Mechanical Engineering.
Examiners
---------------------------
---------------------------
Supervisor
---------------------------
---------------------------
Date:
Place: Zeal Polytechnic, Pune

Zeal Polytechnic Department of Mechanical Engineering PageIII
Zeal Polytechnic
CERTIFICATE
This is to certify that Mr. OMKAR MOHOL, Mr. MOHIT SINGH, Mr.
DATTA PASALKAR, Mr. DHAIRYASHIL PAWAR has successfully
completed the Project entitled “Flexible Drill Machine” under my
supervision and Guidance in the Mechanical engineering department in
academic year 2017-18 in the partial fulfillment of Diploma in
Mechanical Engineering offered by MSBTE.
Date:
Place:
Project Guide : HOD of Mech. Dept.
Zes’s Zeal Polytechnic, Pune-41
Examiner: Principal
Zes’s Zeal Polytechnic, pune

Zeal Polytechnic Department of Mechanical Engineering PageIV
ACKNOWLEDGEMENT
I express my deep sense of admiration and gratitude to the supervisor Prof.A.S.Patil,
Lecturer, Department of Mechanical Engineering, Zeal Polytechnic, Narhe, Pune, for
his invaluable encouragement, helpful suggestions and supervision throughout the
course of this work. His willingness, patience and optimistic attitude could lead to
completion of this research work.
I also express my thankfulness to the encouragement from Dr. S. V. Patil (Principal,
Zeal Polytechnic, Narhe, Pune and faculty members of Zeal Polytechnic, Narhe, Pune,
for their valuable suggestions from time to time.
I am thankful to the Liberians of Zeal Polytechnic, Narhe, Pune for their cooperation
in the initial phase of our project.
Among the supporters and all teaching and nonteaching staff deserve special thanks.
The experimental work would not have been possible without their kind cooperation.
Lastly but not the least, I do acknowledge the loving support, cooperation that came
from my family members, relatives to see the completion of this work.
Date :
Mr. Omkar Mohol.
Mr. Mohit Singh.
Mr. Datta Pasalkar.
Mr. Dhairyashil Pawar.
Place:

Zeal Polytechnic Department of Mechanical Engineering PageV
INDEX
Sr. No Contents Page No
1 Abstract 9
2 Introduction 11
3 Literature Review 14
4 Experimental Setup 17
5 Sample Calculations 28
6 Results & Discussion 32
7 Applications 34
8 Conclusion 40
9 Scope For Future Work 42
10 Reference 44
11 Synopsis 46

Zeal Polytechnic Department of Mechanical Engineering PageVI
List of Figures
Sr. No Name of Figures Page No
1 Flexible Drill Machine 17
2 Scissor Jack 18
3 Lead Screw 19
4 DC Motors 20
5 MS Bars 21
6 Drill Bit 22
7 Alluminium Links 23
8 Nut & Bolt 24
9 Foam 25
10 Acrylite 26

Zeal Polytechnic Department of Mechanical Engineering Page1
Chapter-1
ABSTRACT

ABSTRACT
Drill machines have been the heart of every industry. Drilling holes in parts, sheets
and structures is a regular industrial work. Perfect and well aligned drilling needs
fixed and strong drills. Some parts cannot be drilled using fixed drills due to low
space between drill bit and drill bed. We need to use hand drills in such cases but
hand drills have alignment problems while drilling. So here we propose a flexible drill
that can be mounted on a table or wall and can be used to drill holes horizontally,
vertically or even upside down. So this makes it possible for easy drilling in even
complicated parts and surfaces a supporting structure to design and fabricate a drill
for easy drilling operations.
A Scissor Jack is a mechanical device used to easily lift any object off the ground, to
gain access to sections underneath object. The most important fact of a jack is that it
gives the user a mechanical advantage by changing the rotational force on power
screw into linear motion, allowing user to lift a drill machine to the required height. It
is called a scissor jack as the structure consists of diagonal metal components that
expand and contract in the same way as a pair of scissors.

Chapter-2
INTRODUCTION

INTRODUCTION
Flexible Drilling Machine
The drilling machine or drill press is one of the most common and useful machine
employed in industry for producing forming and finishing holes in a work piece. The
unit essentially consists of:
1. A spindle which turns the tool (called drill) which can be advanced in the work
piece either automatically or by hand.
2. A work table which holds the work piece rigidly in position.
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.
Scissor mechanism
A scissor jack is operated simply by turning a small crank that is inserted into one end
of the scissor jack. When this crank is turned, the screw turns, and this raises the jack.
The screw acts like a gear mechanism. It has teeth (the screw thread), which turn and
move the two arms, producing work.
A scissor lift is a cherry picker – or aerial work platform (AWP) or mobile elevating
work platform (MEWP), as it is also called that is raised vertically by means of cross-
crossing (scissor) metal supports that elongate as the platform is raised to gain access
to worksites at height. They feature large flat rectangular platforms enclosed by
guardrails and for this reason they are also sometimes called table lifts. Scissor lifts
are designed to lift workers, tools and materials to height, quickly, safely and cost-
effectively.

Chapter-3
LITERATURE
REVIEW

LITERATURE REVIEW
[Kurt, 2008;Bagci, 2008].Drilling processes are widely used in aerospace, aircraft, and
automotive industries. Although modern metal cutting methods have improved in the
manufacturing industry, like electron beam machining, ultrasonic machining,
electrolytic machining, and abrasive jet machining, conventional drilling is still the
most common machining processes
[Kelly, 2002; Cotteral,2002].On the other hand, in drilling processes, cutting fluids are
used to lubricate the process and reduce the effects of high temperature. In the last
few years, environment problems had forced the development of cutting fluids of low
environmental impact in order to minimize the usage of cutting fluid. The reason why
this lubricant needs to be minimized the usage because it will be cause hazard and
also will difficult to dispose the lubricant or coolant. Therefore, some researchers
have been investigating the alternative methods like dry machining or minimum
quantity lubricant
[Ashish Kumar]There was a clear potential for using this technology for other
applications and only 10 years later, in 1940, the first worm gear screw jack, that is
instantly recognizable today, was offered by Duff-Norton, for adjusting the heights of
truck loading platforms and mill tables. With the ability to be used individually or
linked mechanically and driven by either air or electric motors or even manually, the
first model had a lifting capacity of 10 tons with raises of 2′′ or 4′′
[SolankiNehal]Over the next 30 years the Duff Manufacturing Company became the
largest manufacturer of lifting jacks in the world, developing many new types of jack
for various applications including its own version of the ball bearing screw jack. It
was only natural that in 1928, The Duff Manufacturing Company Inc. merged with
A.O. Norton to create the Duff-Norton Manufacturing Company.

[Henry Maudsley] Screw type mechanical jacks were very common for jeeps and
trucks of World War II vintage. For example, the World War II jeeps (Willys MB and
Ford GPW) issued the "Jack, Automobile, Screw type, Capacity 1 1/2 ton", Ordinance
part number 41-J-66. These jacks, and similar jacks for trucks, were activated by
using the lug wrench as a handle for the ratchet action to the jack. The 41-J-66 jack
was carried in the jeep's tool compartment. Screw type jacks continued in use for
small capacity requirements due to low cost of production to raise or lower the load.
A control tab is marked up/down and its position determines the direction of
movement and with no maintenance. The virtues of using a screw as a machine
element, which is essentially an inclined plane wound round a cylinder, was first
demonstrated by Archimedes in 200BC with his device used for pumping water.
[Edward M.Lonnon.] The scissor jack apparatus uses electrical power to elevate an
automobile with a cigar lighter plug of an auto to power the high torque electric motor
of the apparatus. The motor is in communication with the scissor jack via the Lead
Screw so that maximum torque is applied to the scissor jack. Aluminium is around
one third the density of steel at 2.72 mg/m cubed compared to steel's 7.85 mg/m
cubed. The light weight and low melting point of aluminium makes it easier and more
efficient to machine than steel. Aluminium’s fatigue performance is half that of steel,
which is an advantage steel has over aluminium in car jack life durability. Therefore
Aluminium is the most viable material selected for the manufacture of the car scissor
jack.

Chapter-4
EXPERIMENTAL
SETUP

EXPERIMENTAL SETUP
Working Model of FLEXIBLE DRILL MACHINE
Basically, it works on principle of Scissor Jack Mechanism for adjustment of
downward and upward motion. The motion Scissor Jack is obtain by DC Motor which
is connected with Lead Screw. We have connected the base and upward part of
Scissor with the help of Aluminium Plates.
We have placed the Slider Mechanism on Scissor Jack and we place the Drill Bit on
slider with the help of Motor & we give the sliding motion of slider with the help of
Lead Screw & Motor.
When the DC supply is given to motor then Lead Screw rotates by which vertical
movement of Scissor Jack can be done as per requirement. The slider which having a
Lead Screw which helps to rotate the slider in Horizontal direction. To applying the
force to getting accurate hole by Drilling .we placed the lead screw motor behind the
Drill Bit. This is result of project.

SCISSOR JACK MECHANISM
effectively.

LEAD SCREW
A leadscrew also known as a ice screw or translation screw is a screw used as
a linkage in a machine, to translate turning motion into linear motion. Because of the
large area of sliding contact between their male and female members, screw
threads have larger frictional energy losses compared to other linkages. They are not
typically used to use high power, but more for intermittent use in low power actuator
and positioner mechanisms. Common applications are linear actuators, machine slides
(such as in machine tools), vises, presses, and jacks.
Leadscrews are manufactured in the same way as other thread forms (they may
be rolled, cut, or ground).
A lead screw is sometimes used with a split nut also called half nut which allows the
nut to be disengaged from the threads and moved axially, independently of the screw's
rotation, when needed (such as in single-point threading on a manual lathe).

DC MOTOR
DC motor is any of a class of rotary electrical machines that converts direct current
electrical energy into mechanical energy. The most common types rely on the forces
produced by magnetic fields. Nearly all types of DC motors have some internal
mechanism, either electromechanical or electronic, to periodically change the
direction of current flow in part of the motor.
DC motors were the first type widely used, since they could be powered from existing
direct-current lighting power distribution systems. A DC motor's speed can be
controlled over a wide range, using either a variable supply voltage or by changing
the strength of current in its field windings. Small DC motors are used in tools, toys,
and appliances. The universal motor can operate on direct current but is a lightweight
motor used for portable power tools and appliances. Larger DC motors are used in
propulsion of electric vehicles, elevator and hoists, or in drives for steel rolling mills.
The advent of power electronics has made replacement of DC motors with AC
motors possible in many applications.

MS BARS
MS Bar’s also known as blank, slug or billet is a common form of raw purified metal,
used by industry to manufacture metal parts and products. Bar stock is available in a
variety of extrusion shapes and lengths. The most common shapes are round (circular
cross-section), rectangular, square and hexagonal or hex. A bar is characterised by an
"enclosed invariant convex cross-section", meaning that pipes, angle stock and objects
with varying diameter are not considered bar stock.
Bar stock is commonly processed by a sequence of sawing, turning, milling, drilling
and grinding to produce a final product, often vastly different from the original stock.
In some cases, the process is partially automated by specialized equipment which
feeds the stock into the appropriate processing machine.

DRILL BIT
Drill bits are cutting tools used to remove material to create holes, almost always of
circular cross-section. Drill bits come in many sizes and shapes and can create
different kinds of holes in many different materials. In order to create holes drill bits
are usually attached to a drill, which powers them to cut through the workpiece,
typically by rotation. The drill will grasp the upper end of a bit called the shank in
the chuck.
Drill bits come in standard sizes, described in the drill bit sizes article. A
comprehensive drill bit and tap size chart lists metric and imperial sized drill bits
alongside the required screw tap sizes. There are also certain specialized drill bits that
can create holes with a non-circular cross-section.
While the term drill may refer to either a drilling machine or a drill bit for use in a
drilling machine, in this article, for clarity, drill bit or bit is used throughout to refer to
a bit for use in a drilling machine, and drill refers always to a drilling machine.

ALUMINIUM LINKS
Aluminium or aluminum is a chemical element with symbol Al and atomic
number 13. It is a silvery-white, soft, nonmagnetic, ductile metal in the boron group.
By mass, aluminium makes up about 8% of the Earth's crust; it is the third most
abundant element after oxygen and silicon and the most abundant metal in the crust,
though it is less common in the mantle below. The chief ore of aluminium is bauxite.
Aluminium metal is so chemically reactive that native specimens are rare and limited
to extreme reducing environments. Instead, it is found combined in over 270
different minerals. we used this aluminium bars in scissor jack mechanism for smooth
movement.

NUT & BOLTS
A nut is a type of fastener with a threaded hole. Nuts are almost always used in
conjunction with a mating bolt to fasten multiple parts together. The two partners are
kept together by a combination of their threads' friction (with slight elastic
deformation), a slight stretching of the bolt, and compression of the parts to be held
together.
In applications where vibration or rotation may work a nut loose, various locking
mechanisms may be employed: lock washers, jam nuts, specialist adhesive thread-
locking fluid such as Loctite, safety pins (split pins) or lockwire in conjunction
with castellated nuts, nylon inserts (nyloc nut), or slightly oval-shaped threads.
Square nuts, as well as bolt heads, were the first shape made and used to be the most
common largely because they were much easier to manufacture, especially by hand.
While rare today due to the reasons stated below for the preference of hexagonal nuts,
they are occasionally used in some situations when a maximum amount of torque and
grip is needed for a given size: the greater length of each side allows a spanner to be
applied with a larger surface area and more leverage at the nut.
joint against sideways shear forces. For this reason, many bolts have a plain
unthreaded shank (called the grip length) as this makes for a better, stronger dowel.
The presence of the unthreaded shank has often been given as characteristic of bolts
vs. screws, but this is incidental to its use, rather than defining. The grip length should

be chosen carefully, to be around the same length as the thickness of the materials,
and any washers, bolted together. Too short places the dowel shear load onto the
threads, which may cause fretting wear on the hole. Too long prevents the nut from
being tightened down correctly. No more than two turns of the thread should be
within the hole.

FOAM CORE
The surface of the regular board, like many other types of paper, is slightly acidic.
However, for modern archival picture framing and art mounting purposes it can be
produced in a neutral, acid-free version with a buffered surface paper, in a wide range
of sizes and thicknesses.
Foam-cored materials are also now available with a cladding of solid (non-
foamed) polystyrene and other rigid plastic sheeting, some with a textured finish.
Foam core does not adhere well to some glues, such as superglue, and certain types
of paint. The foam tends to melt away and dissolve. Some glue works well in casual
settings, however, the water in the glue can warp the fibers in the outer layers. Best
results are typically obtained from higher-end spray adhesives. A hot glue gun can be
used as a substitute, although the high viscosity of hot glues can affect finished
projects in the form of board warping, bubbles, or other unsightly blemishes.
Self-adhesive foam boards, intended for art and document mounting are also
available, though these can be very tricky to use properly; this is because the glue sets
very fast. It is considered cheaper to buy plain foam board and then re-positionable
spray mount adhesive.

ACRYLITE
Poly(methyl methacrylate) (PMMA), also known as acrylic or acrylic glass as well as
by the trade names Crylux, Plexiglas, Acrylite, Lucite, and Perspex among several
others (see below), is a transparent thermoplastic often used in sheet form as a
lightweight or shatter-resistant alternative to glass. The same material can be used as a
casting resin, in inks and coatings, and has many other uses.
Although not a type of familiar silica-based glass, the substance, like many
thermoplastics, is often technically classified as a type of glass (in that it is a non-
crystalline vitreous substance) hence its occasional historical designation as acrylic
glass. Chemically, it is the synthetic polymer of methyl methacrylate. The material
was developed in 1928 in several different laboratories by many chemists, such as
William Chalmers, Otto Röhm, and Walter Bauer, and was first brought to market in
1933 by the Rohm and Haas Company under the trademark Plexiglas.
PMMA is an economical alternative to polycarbonate (PC) when tensile
strength, flexural strength, transparency, polishability, and UV tolerance are more
important than impact strength, chemical resistance and heat
resistance.[5]Additionally, PMMA does not contain the potentially harmful bisphenol-
A subunits found in polycarbonate. It is often preferred because of its moderate
properties, easy handling and processing, and low cost.

SAMPLE CALCULATIONS
For Lead Screw
Chapter-5
SAMPLE
CALCULATIONS

For Lead Screw

For Scissor Jack Mechanism

Chapter-6
RESULTS

RESULT
downward and upward motion. The motion Scissor Jack is obtain by DC Motor which
Lead Screw & Motor.
Drill Bit. This is result of project.

Chapter-7
APPLICATIONS

APPLICATIONS
 Create hole of different size in solid materials.
 Used in Marine Engineering.
 Used to create holes without moving a job.
 To Create a hole on roof.
 This can be also use to lift the Heavy objects.

PROBLEM STATEMENT
The most common problem encountered while using scissor jack is the instability of
jack while giving jerks to loosen the wheel nut. Also the common jack having small
base is unable to provide proper support on uneven surface esp. off-road and no
inclination in that jack is tolerable.
OBJECTIVE
The project relates to the designing of simple scissor jack and its analysis along with
structural improvements to make such a modified jack that is very stable and can take
enough load on uneven surfaces and somewhat inclination is also allowed.
The project also aims at designing and finding stresses, efficiency, expected life of
screw. We endeavor to develop a screw jack such that it is cost effective, having a
long life and can be handled roughly.
Although it is primarily designed to make cylindrical holes, but it can also be used to
perform many other operations like boring, counter boring, tapping, spot facing,
reaming, bottoming, lapping, grinding, trepanning, etc. It is very cheap, can be
installed at any place. Accurate holes and many other operations can be carried out
with a minimum expenditure.

METHODOLOGY
of the scissor jack. This crank is usually “Z” shaped. The end fits into a ring hole
mounted on the end of the screw, which is the object of force on the scissor jack.
When this crank is turned, the screw turns, and this raises the jack. The screw acts like
a gear mechanism. It has teeth(the screw thread), which turn and move the two arms,
producing work. Just by turning this screw thread, the scissor jack can lift a vehicle
that is several thousand pounds.
Drilling may affect the mechanical properties of the work piece by creating low
residual stresses around the hole opening and a very thin layer of highly stressed and
disturbed material on the newly formed surface. This causes the work piece to become
more susceptible to corrosion and crack propagation at the stressed surface. A finish
operation may be done to avoid these detrimental condition

COST ESTIMATION
Cost estimation may be defined as the process of forecasting the expenses that must
be incurred to manufacture a product. These expenses take into a consideration all
expenditure involved in a design and manufacturing with all related services facilities
such as pattern making, tool, making as well as a portion of the general administrative
and selling costs.
PURPOSE OFCOST ESTIMATING:
1.To determine the selling price of a product for a quotation or contract so as to
ensure a reasonable profit to the company.
2.Check the quotation supplied by vendors.
3.Determine the most economical process or material to manufacture the product.
4.To determine standards of production performance that may be used to control the
cost.
SR.NO COMPONENT QUANTITY PRICE
1 Lead Screw 3 900
2 Scissor Jack Links 4 300
3 DC Motors 4 1200
4 Bars on Slider 2 300
5 Base of Scissor Jack - 900
6 Base of Drill - 700

Chapter-8
CONCLUSION

CONCLUSION
The model works correctly as per the design with the help of Scissor Jack
Mechanism, we can efficiently reduce the Human power and Further advancement in
this technology can be made.
The mechanism of Scissor Jack can be also used to lift heavy loads due to its capacity.
The existing jack was modified by making small alteration and making use of an
electric motor to drive power screw.
The project relates to the designing of Flexible Drill Machine with simple scissor jack
and its analysis along with structural improvements to make such a modified jack that
is very stable and can take enough load on uneven surfaces and some what inclination
is also allowed. The project also aims at designing and finding stresses, efficiency,
expected life of screw. We endeavor to develop a screw jack such that it is cost
effective, having a long life and can be handled roughly.

Chapter-9
SCOPE FOR
FUTURE WORK

FUTURE SCOPE
 Supports can be used.
 Good future in Marine, Automation and Robotics.
 Codings and Programmes can be used in this machine.
 This Flexible Drilling Machine can be operated with the help of Computers
and Smart phones.

Chapter-10
REFFERENCE

REFFERANCE
[1] V.B. Bhandari (2012) “Design of Machine Elements” McGraw Hill, ISBN.
[2] Jose VitorSouze, International Journal of Design of Machine Tools &
Manufacture, 2002.
[3] Nayyar, P.E., Mohinder L. (2000). "A1". In Mohinder L. Nayyar, P.E.Design Data
Handbook (7th Ed.). New York: McGraw-Hill. ISBN

Chapter-11
SYNOPSIS
REPORT

SYNOPSIS REPORT
On
“FLEXIBLE DRILLING MACHINE”
By
1) MR.OMKAR A. MOHOL
2) MR. DHAIRYASHIL S. PAWAR
3) MR. MOHIT S. SINGH
4) MR. DATTA V. PASALKAR
Guide
Prof. A.S.PATIL
Department of Mechanical Engineering
ZES’s
Zeal Polytechnic
[2017-18]

INDEX
Sr. No Contents Page No
1 Abstract 44
2 Introduction 50
3 Literature Review 51
4 Working Principle 53
5 Problem Statement 54
6 Methodology 55
7 Cost Estimation 56
8 Conclusion 57
9 Scope For Future Work 58
10 Reference 59

ABSTRACT
Drill machines have been the heart of every industry. Drilling holes in parts, sheets
and structures is a regular industrial work. Perfect and well aligned drilling needs
fixed and strong drills. Some parts cannot be drilled using fixed drills due to low
space between drill bit and drill bed. We need to use hand drills in such cases but
hand drills have alignment problems while drilling. So here we propose a flexible drill
that can be mounted on a table or wall and can be used to drill holes horizontally,
vertically or even upside down. So this makes it possible for easy drilling in even
complicated parts and surfaces a supporting structure to design and fabricate a drill
for easy drilling operations.
A Scissor Jack is a mechanical device used to easily lift any object off the ground, to
gain access to sections underneath object. The most important fact of a jack is that it
gives the user a mechanical advantage by changing the rotational force on power
screw into linear motion, allowing user to lift a drill machine to the required height. It
is called a scissor jack as the structure consists of diagonal metal components that
expand and contract in the same way as a pair of scissors.

INTRODUCTION
Flexible Drilling Machine
The drilling machine or drill press is one of the most common and useful machine
employed in industry for producing forming and finishing holes in a work piece. The
unit essentially consists of:
1. A spindle which turns the tool (called drill) which can be advanced in the work
piece either automatically or by hand.
2. A work table which holds the work piece rigidly in position.
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.
Scissor mechanism
effectively.

LITERATURE REVIEW
[Kurt, 2008;Bagci, 2008].Drilling processes are widely used in aerospace, aircraft, and
automotive industries. Although modern metal cutting methods have improved in the
manufacturing industry, like electron beam machining, ultrasonic machining,
electrolytic machining, and abrasive jet machining, conventional drilling is still the
most common machining processes
[Kelly, 2002; Cotteral,2002].On the other hand, in drilling processes, cutting fluids are
used to lubricate the process and reduce the effects of high temperature. In the last
few years, environment problems had forced the development of cutting fluids of low
environmental impact in order to minimize the usage of cutting fluid. The reason why
this lubricant needs to be minimized the usage because it will be cause hazard and
also will difficult to dispose the lubricant or coolant. Therefore, some researchers
have been investigating the alternative methods like dry machining or minimum
quantity lubricant
[Ashish Kumar]There was a clear potential for using this technology for other
applications and only 10 years later, in 1940, the first worm gear screw jack, that is
instantly recognizable today, was offered by Duff-Norton, for adjusting the heights of
truck loading platforms and mill tables. With the ability to be used individually or
linked mechanically and driven by either air or electric motors or even manually, the
first model had a lifting capacity of 10 tons with raises of 2′′ or 4′′
[SolankiNehal]Over the next 30 years the Duff Manufacturing Company became the
largest manufacturer of lifting jacks in the world, developing many new types of jack
for various applications including its own version of the ball bearing screw jack. It

was only natural that in 1928, The Duff Manufacturing Company Inc. merged with
A.O. Norton to create the Duff-Norton Manufacturing Company.
[Henry Maudsley] Screw type mechanical jacks were very common for jeeps and
trucks of World War II vintage. For example, the World War II jeeps (Willys MB and
Ford GPW) issued the "Jack, Automobile, Screw type, Capacity 1 1/2 ton", Ordinance
part number 41-J-66. These jacks, and similar jacks for trucks, were activated by
using the lug wrench as a handle for the ratchet action to the jack. The 41-J-66 jack
was carried in the jeep's tool compartment. Screw type jacks continued in use for
small capacity requirements due to low cost of production to raise or lower the load.
A control tab is marked up/down and its position determines the direction of
movement and with no maintenance. The virtues of using a screw as a machine
element, which is essentially an inclined plane wound round a cylinder, was first
demonstrated by Archimedes in 200BC with his device used for pumping water.

Working Principle
downward and upward motion.The motion Scissor Jack is obtain by DC Motor which
Lead Screw & Motor.
Drill Bit. This is working of project.

PROBLEM STATEMENT
The most common problem encountered while using scissor jack is the instability of
jack while giving jerks to loosen the wheel nut. Also the common jack having small
base is unable to provide proper support on uneven surface esp. off-road and no
inclination in that jack is tolerable.
OBJECTIVE
The project relates to the designing of simple scissor jack and its analysis along with
structural improvements to make such a modified jack that is very stable and can take
enough load on uneven surfaces and somewhat inclination is also allowed.
The project also aims at designing and finding stresses, efficiency, expected life of
screw. We endeavor to develop a screw jack such that it is cost effective, having a
long life and can be handled roughly.
Although it is primarily designed to make cylindrical holes, but it can also be used to
perform many other operations like boring, counter boring, tapping, spot facing,
reaming, bottoming, lapping, grinding, trepanning, etc. It is very cheap, can be
installed at any place. Accurate holes and many other operations can be carried out
with a minimum expenditure.

METHODOLOGY
of the scissor jack. This crank is usually “Z” shaped. The end fits into a ring hole
mounted on the end of the screw, which is the object of force on the scissor jack.
When this crank is turned ,the screw turns, and this raises the jack. The screw acts like
a gear mechanism. It has teeth(the screw thread), which turn and move the two arms,
producing work. Just by turning this screw thread, the scissor jack can lift a vehicle
that is several thousand pounds.
Drilling may affect the mechanical properties of the work piece by creating low
residual stresses around the hole opening and a very thin layer of highly stressed and
disturbed material on the newly formed surface. This causes the work piece to become
more susceptible to corrosion and crack propagation at the stressed surface. A finish
operation may be done to avoid these detrimental condition

COST ESTIMATION
Cost estimation may be defined as the process of forecasting the expenses that must
be incurred to manufacture a product. These expenses take into a consideration all
expenditure involved in a design and manufacturing with all related services facilities
such as pattern making, tool, making as well as a portion of the general administrative
and selling costs.
PURPOSE OFCOST ESTIMATING:
1.To determine the selling price of a product for a quotation or contract so as to
ensure a reasonable profit to the company.
2.Check the quotation supplied by vendors.
3.Determine the most economical process or material to manufacture the product.
4.To determine standards of production performance that may be used to control the
cost.
SR.NO COMPONENT QUANTITY PRICE
1 Lead Screw 3 900
2 Scissor Jack Links 4 300
3 DC Motors 4 1200
4 Bars on Slider 2 300
5 Base of Scissor Jack - 900
6 Base of Drill - 700

CONCLUSION
The model will be works correctly as per the design With the help of Scissor Jack
Mechanism, we can efficiently reduce the Human power and Further advancement in
this technology can be made.

FUTURE SCOPE
 Supports can be used.
 Good future in Marine, Automation and Robotics.
 Codings and Programmes can be used in this machine.
 This Flexible Drilling Machine can be operated with the help of Computers
and Smart phones.

REFFERANCE
• Design Data Hand Book by Mahadevan .
• Machine Design by Bhandari .
• GOOGLE.COM

Project Report on flexible drill machine

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