Presentation on Production Process1

8/9/2019 Presentation on Production Process1

1/13

PRESENTATIONPRESENTATION

ONON

PRODUCTION PROCESSPRODUCTION PROCESS

SHISHUPAL SINGH

MUKESH GOUTAM


2/13

CONTENTS-

PATTERN MAKING

LATHE AND ITS OPERATIONS

GRINDING


3/13

PATTERN MAKING

PATTERN - Pattern is a model of anything so constructed that it may be used for

forming an impression called mould in damp sand or other suitable material.

PATTERN MATERIALS SELECTION FACTORS :

Service requirements

Type of production of casting.

Type of moulding process Possibility of design changes

No. of casting to be produced

PROPERTIES OF MATERIALS :

Easily worked, shaped and joined Light weight

String hard durable

Dimensionally stable.

Easily available at low cost.

Repairable and reused.


4/13

PATTERN MATERIALS:

1. WOOD

2. METAL

Cast iron

Brass Aluminium

White metal

3. Plastics

4. Rubbers

5. Plasters

6. Waxes


5/13

TYPES OF PATTERNS :

1. Single piece pattern

2. Split pattern3. Match plate pattern

4. Cope and drag pattern

5. Gated pattern

6. Loose piece pattern

7. Sweep pattern


6/13

PATTERN MAKING ALLOWANCES :

1.Shrinkage allowance:

2.Draft allowance

3.Machining allowance

4.Distortion/Camber allowance

5. Rapping allowance


7/13

LATHE MACHINE

Principle :

Lathe removes material from the work piece in the form of chips with the help of a toolswhich is traversed across the work and that can be fed deep in the work.

CLASSIFICATION OF LATHE:

1.Speed lathe

2.Engine/centre lathe

3. Turret lathe4.Capstan lathe

5.Tool room lathe

6.Bench lathe

7.Gap bed lathe

8.Hollow spindle lathe

9.Vertical turret lathe


8/13

Parts of lathe:1.Bed

2.Headstock

3.Tailstock

4.Main spindle

5.Carriage

6.Feed mechanism

7.Screw cutting mechanism

8.Chuck


9/13

Operations:

Cylindrical and Conical jobs(turning)Flat surfacing-facing

Grooving

Drilling, boring, reaming

Countersink and Counterbore

Knurling

PartingThreads(internal and external)

Chamfering

Spinning

Milling


10/13


11/13

Grinding : Process of removing metal but comparatively smaller in volume. Material

is removed by means of a rotating abrasive wheel.

Purpose of grinding:

1. To remove very small amount of metal.

2. To obtain better finished surface.

3. Machining hard surfaces which are else difficult to machine by

H.S.S. tool & carbide cutters.

4. Grinding threads.

5. Extremely smooth finish &

very accurate dimensions.

6. Produce complex profiles.


12/13

TYPES OF GRINDING :

1.Rough/Non-precision grinding

2.Finish/precision grinding

External cylindrical grinding

Internal cylindrical grinding

Surface grindingForm grinding

GRINDING MACHINES1.Rough grinders

2.Precision grinders


13/13

Documents

Presentation on Production Process1