TRAINING Manufacturing of Camshaft & Valve TappetPRESENTATION.ppt

7/27/2019 TRAINING Manufacturing of Camshaft & Valve TappetPRESENTATION.ppt

http://slidepdf.com/reader/full/training-manufacturing-of-camshaft-valve-tappetpresentationppt 1/18

Summer Training Report On

Manufactur ing of Camshaft & Valve Tappet

Presented By:-

PRITHVI RAJ SONI

SOURABH PUROHIT



Company Profile

• MAHLE is leading global development partner for the automotive

and engine industry.

• MAHLE offers unique systems competence in the combustion engine

and engine peripherals.

• MAHLE has a local presence in all major world markets. In 2014,

some 65,000 employees at 140 production locations are expected to

generate sales of around ten billion euros.

•At ten major research and development centers in Germany, GreatBritain, the USA, Brazil, Japan, China, and India, more than 4,000

development engineers and technicians are working on forward-

looking concepts, products, and systems.

• MAHLE Engine components Pvt. Lmt. Is located in Pithampur

district, near indore



INTRODUCTION

CAMSHAFT

• Camshaft is engine component which converts rotatory motion

into reciprocatory motion.

• A camshaft is a shaft to which a cam is fastened or of which a

cam forms an integral part



VALVE TAPPET Mushroom Head Cylindrical

• A tappet is a projection which imparts a linear motion to

some other component within a mechanism.

• The tappet is that part, also termed a cam follower that

runs on the camshaft and is made to move vertically by

the action of the rotating cam.



VARIOUS DEPARTMENTS FOR MANUFACTURINGPROCESSES OF CAMSHAFT & VALVE TAPPET

• Green Sand Foundry

• Shell sand Foundry

• Machining

• Inspection & Quality Control



GREEN SAND FOUNDRY

• Green sand casting is a metal casting process characterized

by using sand as the mold material.

• Sand is moistened, typically with water, but sometimes with

other substances, to develop strength and plasticity.

• "green sand" is not a type of sand on its own, but is rather a

mixture of silica sand (SiO2), or chromite sand (FeCr2O), or

zircon sand (ZrSiO4), 75 to 85%, or olivine, or staurolite, or

graphite.



There are six steps in this process:

1. Place a pattern in sand to create a mold.

2. Incorporate the pattern and sand in a gating system.

3. Remove the pattern.

4. Fill the mold cavity with molten metal.

5. Allow the metal to cool.

6. Break away the sand mold and remove the casting.





SHELL SAND FOUNDRY

• Shell mold casting, is an expendable mold casting process that

uses a resin covered sand to form the mold.

• As compared to sand casting, this process has better dimensional

accuracy, a higher productivity rate, and lower labor

requirements.

• Shell mold casting allows the use of both ferrous and non-

ferrous metals, most commonly using cast iron, carbon steel,

alloy steel, stainless steel, aluminum alloys, and copper alloys.



The shell mold casting process consists of the following steps:

1. Pattern creation - A two-piece metal pattern is created in the shape of the

desired part.

2. Mold creation - First, each pattern half is heated to 175-370°C (350-700°F)

and coated with a lubricant to facilitate removal. The heated pattern partially

cures the mixture, which now forms a shell around the pattern.

3. Mold assembly - The two shell halves are joined together and securely

clamped to form the complete shell mold

4. Pouring - The mold is securely clamped together while the molten metal is

poured from a ladle into the gating system and fills the mold cavity.





MACHINING PROCESSES

Following machine tools are used in maching of valve tappet

1. Pre-grinder (plunge an through feed)

2. Hardness tester

3. Multi Spindle m/c & CNC m/c

4. Heat treatment

5. Lapping m/c

6. Crack testing m/c



CENTRELESS GRINDING MACHINE

• The centreless grinder is a type of grinding machine used to shape the

outside of an object.

•

Centerless grinding is a form of grinding where a regulating wheel positioned on the opposite side of the object to the grinding wheel.

• A work rest keeps the object at the appropriate height but has no

bearing on its rotary speed.



MULTI SPINDLE MACHINE

• It can provide the various types of machining such as boring,

turning, chamfering, threading, grooving, and drilling by moving

the work pieces between 6 or 8 stations simultaneously.

• Generally Multi Spindle Automatic Lathe can provide approx. 4

－5 times of machining speed comparing to the Single Spindle

Lathe



LAPPING MACHINE

• Lapping is a superfinishing machining process.

• Two surfaces are rubbed together with an abrasive between them, by

hand movement or by way of a machine.



HEAT TREATMENT

Heat treatment is to increase service life of a product by increasing its

strength or hardness, or prepare the material for improved

manufacturability.

Heat Treatment Processes

Hardening

Annealing

Normalizing

Tempering



FINAL INSPECTION

NITRIDIN TAPPET

VISUAL INSPECTION- I

DIMENSIONAL INSPECTION

VISUAL INSPECTION- II

OIL PACKING



Documents

TRAINING Manufacturing of Camshaft & Valve TappetPRESENTATION.ppt