mft ii manual 2

8/13/2019 Mft II Manual 2

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OXFORD ENGINEERING COLLEGE

(AN ISO 9001: 2000 Certified & NBA Accredited Institution)

Karumandapam, Pirattiyur, Trichy620 009

Department of Mechanical Engineering

L B M NU L

Staff In charge: HoD Mechanical

Hod Civil

SUBJECT Manufacturing technology IISUBJECT CODE ME2258

University Anna university ChennaiRegulation 2009

SEMESTER FourthLAB IN CHARGE S.Senthil kumaran

TECHNICAL ASSISTANTS Duraisamy.mSebastin. s


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CONTENTS

Ex.No. Name of the Experiment Page. No.

1. Safety Precaution2. Study of Lathe3. Assembly of FitsLathe4. Lathe tool dynamometer5. Study of Milling machine6. Machining Hexagon from circular workpiece7. Study of Gear hobbing Machine8. Study Of SHAPPER

9. Assembly of Fits Shapper10. Study of DRILLING Machine11. Drilling operation using Drilling machine12. Key way cutting using Slotting machine13. Surface Grinding-14. Cylindrical Grinding15. Study of Tool and Cutter grinder16. Study Of Capstan And Turret Lathe


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Ex no : 1

Date

WORK SHOPSAFETY PRECAUTIONS

WORK SHOP - DEFINITION

It is a place where the raw material is converted into

finished product.

In other words it is a place where human efforts,

machines, materials & the tools togather manufacture

product.

SAFETY PRECAUTIONS

Keep your Workshop floor Clean and free from dirts.

Always wear Shoes in the Workshop.

Do not wear rings, wrist watch and bangles in the Workshop.

Wear the proper Workshop dress.

Check the machine conditions before machining.

Do not work without guidance of Workshop Supervisor.

Dont operate a machine whose controls is not surely known

to you.

Do not run or talk in the Workshop.

Avoid unnecessary discussions during work time.

Take first aid treatment immediately in case of any injury.

Use proper Safeguards.

Keep the Cutting and measuring tools separately.Check the fire extinguishers periodically.

Follow the instructions of Staff members.

Maintain discipline.

RESULT

Thus the safety Precautions are observed and followed.


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Ex no : 2 STUDY OF LATHE

Date

LATHE

Lathe is a machine, which removes the metal from a piece of

cylindrical work to the required shape &size

TYPES OF LATHE

Engine Lathe

The most common form of lathe, motor driven and comes in large

variety of sizes and shapes.

Bench Lathe

A bench top model usually of low power used to make precision

machine small work pieces.

Tracer Lathe

a lathe that has the ability to follow a template to copy a shape or

contour.

Automatic Lathe

A lathe in which the work piece is automatically feed and removed

without use of an operator. Cutting operations are automatically controlled

by a

sequencer of some form

Turret Lathe

lathe which have multiple tools mounted on turret either attached

to the tailstock or the cross-slide, which allows for quick changes in tooling

and cutting operations.

Computer Controlled Lathe

A highly automated lathe, where both cutting, loading, tool changing,and part unloading are automatically controlled by computer coding.


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CENTRE LATHE


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BED

It is the base of the machine. On its left side, the head stock is

mounted. A movable casting tail stock is mounted on the right side.

The legs of the bed have to down and grout the lathe.

HEAD STOCK

It consists of a spindle, gears and speed change levers. It is used to

transmit the motion to the job. There are two types of head stock.

1. Belt driven headstock2. Geared headstock

CARRIAGE

Carriage is used to carry a tool bring in contact with rotating

workpiece or to withdraw from such a contact. It operation on bed

ways between the head stock and tail stock.

SADDLE

It is a H shaped part fitted on thelathe bed. There is a hand wheel

to move it on the bed way. Cross slide, compound rest, tool post are

fitted on this saddle.

(a)Cross slideIt is on the upper side of saddle in the from of dove tail. A hand

wheel is provided to drive the cross slide. It the crosswise movement

of the tool (i.e.)Movement of tool towards or away from the operator.

(b)Compound restIt is fitted over the cross slide on a turn table. It permits both parallel

and

Angular movement to cutting tool.

(c) Tool postIt is fitted on the top most part of compound rest. Tool is mounted

on this tool post. Cutting tool is fixed in it with the help of screw.

APRON


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It is the hanging part in front of the carriage. It is used for

transmitting power for automatic feed or feed for thread cutting

operation.

TAIL STOCK

It is located at the right end of the lathe bed and it can be positioned

any where in the bed. It is used for supporting lengthy jobs and also

carries tool to carry out operations such as tapping, drilling, reaming.

LATHE OPERATIONS

Turning:

Troduce straight, conical, curved, or grooved workpieces

Facing:

To produce a flat surface at the end of the part or for making face

grooves.

Boring:

To enlarge a hole or cylindrical cavity made by a previous process or

to produce circular internal grooves.

Drilling:

To produce a hole by fixing a drill in the tailstock

Threading:

To produce external or internal threads

Knurling:

To produce a regularly shaped roughness on cylindrical surfaces


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ASSEMBLY OF FITS - LATHE


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Ex no : 3 ASSEMBLY OF FITS - LATHE

DATE :

AIMTo make the shaft and the hole on given work piece using lathe.

MATERIALS REQUIRED

Dia 45x402 nos of MS rod

TOOLS REQUIRED

1.Chuck key

2. Tool post key

3.Steel rule4.vernier caliper

5.center drill

6.HSS tool drill

7.marker/scriber.

8.Punch & hammer

PROCEDURE

Hold the given piece ( first) in 3 jaw chuck.

Turn the OD and finish it as per the dimentions given in the diagram

Remove the work piece from the lathe.

Hold the second work piece in the 3 jaw chuck.

Hold the drill bit in the center of tail stock

Make a hole in the center face of the work piece by using the drill bit.

Fit the fist ( male ) and second ( female ) work piece as per the diagram given.

RESULT

Thus the shaft and hole is finished and Fit is made as per the dimensions given in

the Drawing using lathe machine.


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LATHE TOOL DYNAMOMETER

Depth of cut - 0.1 mm

Job MaterialMild Steel

Sr

no

SPEED THRUST ( Fv)

Ch1

Feed (Fv)

Ch2

Radial (Fv)

Ch3

1

2

3

Depth Of cut0.1 mmSpeed450 rpm

Sr

no

Job Material THRUST ( Fv)

Ch1

Feed (Fv)

Ch2

Radial (Fv)

Ch3

1 Mild Steel

2 Brass

3 Aluminium


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Ex no : 4 LATHE TOOL DYNAMOMETER

Date :

AIM

To determine the effet of thrust force on depth of cut, speed, feed on thejob material.

To determine the effect of feed force on depth of cut, speed, feed on job

material.

To determine the effect of radial force on depth of cut, speed, feed on the

job material.

INTRODUCTION

In the maufacturing of various macine components a number of machiningoperations are carried. Hence it is essential to study the metal cutting process for

economical aspects. In short, the tool force measured by tool dynamometer is essentail

tool to analyse the process of metal cutting force.The test result are used to solve floor

problems such as tool performance.

SPECIFICATION

1.Sensing Unit

It consists of cylinder with strain gauges mounted on it.

2.Bridge balancing unit

3.Stain gauges

Resistance350 ohms

Gauge Factor2 +- 1

4.Balance Pot

5.Calibration

PROCEDURE

1. Fix the plan sensing unit of the dynamometer on lather tool.2. Connect force indicator with 230V single phase supply and switch on the supply3. Wait for 5 to 10 miniutes to balance the channels and get zero reading on display

with mount the solid piece in the chuck.

4. Adjust the speed & feed of the lathe machine and start the machine feed andtool feed manually to start cutting and then feed it automatically.

5. The vertical & horizantal radial force on the dynamometer should not exceed thelimits.

6. Note down the reading and change the depth of cut and repeat the sameprocedure.

PRECAUTIONS


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1. Zero adjustment must be done2. Do not apply excessive load on the sensing unit.3. To ensure long lift the balance pots must also be operated very carefully.4. Maximum force300 kg.

RESULT

Thus the lathe tool dynamometer is studied and verified.


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Ex no : 5

DATE :

STUDY OF COLUMN & KNEE TYPE HORIZANTAL & VERTICAL MILLING MACHINE

AIM

To study the details of universal and vertical milling machine

INTRODUCTION

Milling may be defined as a machining process for removing the excess material

from a work piece with a rotating cutting tool called as milling cutter.

MILLING OPERATION

In general all the milling operation can be grouped into the following types.

(i) Peripheral milling(ii) Face MillingTYPES OF MILLING MACHINE

(a)According to the axis(I) Horizantal milling machine(II) Vertical milling machine

(b)According to the purpose(i) General Purpose Milling Maching(ii) Plain milling machine(iii) Universal Milling machine

(c) Accoring to the production type(i) Planner type milling machine(ii) Beam type milling machine(iii) Arm type milling machine(iv) Hand operated machine(v) Continious Machine(vi) Controlled production milling machine

UNIVERSAL HORIZANTAL MILLING MACHINE

The universal Horizantal milling machine differs from the saddle in two parts, so

that the table can be horizantally controlled.


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VERTICAL MILLING MACHINE

The vertical milling machine is very similar to the plain horizantal milling machine

in neutral position. It is of two types (I) Fixed Bed type ( ii) Column Type.

.

Cutting Speed :

The speed of the milling cutter is its perripheral linear speed resulting from rotating and

it is expressed in M/Min

V = Pi xNxD/ 1000 M/Min

Feed

It is defined as the rate with which operation work pieces advances under cutter.

SAFETY MEASUREMENTS

1) Learn to operate control before operating the machine.2) Work piece must be held on the work piece.3) Dont change spindle speed when the machine is running.

RESULT

Thus the details of Column & Knee type ; Horzantal & vertical milling machine are

studied.


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MACHINING A HEXAGON FORM A CIRCULAR JOB


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EX no : 7 STUDY OF GEAR HOBBING MACHINE

DATE

GEAR HOBBING PROCESS

In gear generating process the gear are formed by machining by means of form

cutter the cutting teeth of the gear have the shape and size of the teeth of gear to be cut.

In generating process the gear teeth are machined as a result of some relative

motion between gear blank and cutter. A cutter of pitch of capable of generating gear

hobbing different number of teeth.

The common generaating process used for cutting teeth are as follows.

GEAR HOBBING

Hobbing is a gear generating process by means of a rotating cutter hob. The hob

resemble a worm with straight and helical thread parallel to the axis.

This will form reach shaped cutting teeth with proper rake and clearance angle of

the holes are either single threaded or multithreaded.

A single threaded hob will complete one revolution for the generation of each

teeth when as threaded the gear cutting with a hob involves the basic motions.

1) Rotation of hob and gear blank2) Radial movement of gear blank3) Down ward feed of job.

RESULT

Thus the study of gear hobbing process is studied.


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SURFACE GRINDING USING HORIZANTAL SPINDLE SURFACE GRINDER


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EX NO : 8 SURFACE GRINDING USING HORIZANTAL SPINDLE SURFACE GRINDER

DATE :

AIM

To grind accurately the surfaces of rectangular work piece to the given

dimension.

TOOLS REQUIRED

1.Vernier Caliper

2.Dial Gauge3.Slip Gauge

PROCEDURE

1.The job is firmly held on the magnetic chuck of the table in a surface grinding machine

2.Suitable speed and traverse limit of the table is fixed .

3.The machine is switched on.

4.By giving suitable depth of cut, step down the grinding wheel towards the job.

5.the job is ground accurately to 0.01 mm step by step, so as to completely grind all the

four surfaces to the given accuracy and to the given dimensions.

6. The job is removed and checked.

7.The machine is stopped.

RESULT

Thus the given job surfaces is ground on all the four sides to the given accuracy level.


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GRINDING A CIRCULAR JOB IN A UNIVERSAL CYLINDRICAL GRINDINGMACHINE


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EX NO : 9 GRINDING A CIRCULAR JOB IN A UNIVERSAL CYLINDRICAL GRINDING

DATE MACHINE

AIM

TO grind a cylindrical and tappered cylindrical surface on a given circular rod.

TOOLS REQUIRED

1. Vernier Caliper2. Dial Gauge3. Slip Gauge

PROCEDURE

1.The given job is mounted in between the centers of the work piece holder of

cylindrical grinding machine.

2. The speed of the grinding wheel head and that of work piece is selected andmachine is switched on .

3. To and fro traverse of the work table is fixed.4. The wheel head is brought near to the rotating job.5. Suitable depth of cut is given and traverse motion of the table is performed to

grind the work piece to entire length.

6. Depth of cut is suitabley given for each traverse motion in step by step, so as tocomplete the grinding of the job

7. The required angle to grind the taper as per the calulation(D-d)/2 x J/L x 360/n = angle in degree

8.The table is switched to the required angle and the work piece is ground for the

length of 35 mm from one end to produce the taper on the work piece.

8. The operation is performed step by step, so as to acheive dimensional accuracy of0.01mm.

9. The machine is stopped and the work piece is checked for dimensions andaccuracy.

10.The work piece is then removed from the work head.RESULT

Hence the job is ground for the required shape with the dimensions accuracy of

0.02mm.


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KEY WAY BY USING SLOTTING MACHINE


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EX NO :10 KEY WAY BY USING SLOTTING MACHINE

DATE :

AIM :

To make a key way in the given hollow cylindrical work piece.

MATERIAL REQURED

Cylindrical work piece.

TOOLS REQUIRED

1.Scriber

2.Punch

3.Hammer

4. Slotting tool

5.Steel Rule

6.Bolt and nut for holding

7.Spanner set.

PROCEDURE

1.Hold the work piece on the table by using bolt and nut.

2.Set the tool in the tool post.

3.Arrange for slotting movement.

4.Give 0.1 mm depth of cut.

5.Finish to dimensions

6.Switch of the machine

7.Check the work piece for dimensions.

RESULT

Thus the Key way is machined in the given hollow cylindrical work piece by using

slotting machine.


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CRANK AND SLOTTED LINK MECHANISM


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Ex no : 11 STUDY OF SHAPING MACHINE

Date

Aim

To Study the Quick return mechanism in shaping machine

Crank and slotted link mechanism

The crank and slotted link mechanism is shown in fig. The motion or power is transmitted

to the bull gear through a pinion which receives its motion from An individual motor or

over head line shaft through speed control mechanism. Speed of bull gear may be

changed by different combination of gearing or by simply shifting the the belt on the

step cone pulley.

Bull gear is the large gear mounted with in the column. Bolted to the centre of the bull

gear is a radial slide which carries a sliding block into which the crank pin is fitted.

Rotation of the bull gear will cause the crank pin to revolve a t a uniform speed.

Sliding block which is mounted upon the crank pin is fitted with in the slotted link. The

slotted link which is also known as the rocker arm is pivoted at its bottom end attached

the frame of the column. The upper end of the rocker arm is forked and connected to

the ram block 8 by a pin.

As the bull gear rotates causing the crank pin to rotate, the sliding block fastened to the

crank pin will rotate on the crank pin circle and at the same time will move up and down

the slot in the slotted link giving it a rocking movement which is communicated to the

ram. Thus the rotary motion of the bull gear is converted to receiprocating movement

of the ram.

Result

Thus the crank and slotted link mechanism in shaper is

studied.


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ASSEMBLY OF FITS- SHAPING


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EX NO13 STUDY OF TOOL AND CUTTER GRINDER

DATE

AIM

To study the tool and cutter grinder.

A universal tool and cutter grinder is used to sharpen the Reamers, Taps, Single point

cutting tool, milling cutters, dies and punches.

MAIN PARTS OF MACHINE

BASE

It supports all the other parts of the machine . The body and frame are in one unit . the

driving and feed mechanism are fitted to the body.

SADDLE

It is on the top of the body. It carries the table . And ot provides the transverse and ctross

wise movement to the table.

COLUMN

It is on the base of the machine and it carries the wheel head, which moves up and down

for the depth of cut.

Wheel Head

It has two grinding wheels on both ends of the spindle and can be swivelled to the

requirement angle ( 360 degree)

WORK HEAD

It is a seperate part and is fitted on the table for cylindrical works. It is drivebn by a

seperate motor fitted with the work head. It moves along the table and can be swievelled

to any angle ( 180 Degree)


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SPECIFICATION

1. Maximum Diameter of the wheel that can be held in the spindle.2.

Maximum height of the job that can be ground.

3. Maximum length of the job that can be ground.4. Maximum breath of the job that can be ground.5. Types of drive ( hydraulic & electrical)6. Number of attachment.

RESULT

Thus the tool and cutter grinder is studied.


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MACHINE THE COMPONENT AS PER DRAWING BY USING

SENSITIVE DRILLING MACHINE.


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Ex No : 14

Date :

MACHINING THE COMPONENT USING SENSITIVE DRILLING MACHINE

Aim :

To machine the given component as per given drawing using sensitive

drilling machine.

Tools Required:

Sensitive drilling machine

Drill Bit061 no

Drill10 - 1 no

Steel rule1 no

Scriber1 no

Machine vice1 no

Packing plates and blocks.

PROCEDURE

1.

mft ii manual 2

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