Grinding Operation

By: Parth Gajjar116170319007 Submitted by: Prof. G.R. Khunt Prof. G.S. Patel Institute Govt. Polytechnic A’bad

INTRODUCTION TO GRINDING PROCESS

• It is the only economical method of cutting hard material like hardened steel.

• It produces very smooth surface , suitable for bearing surface.

• Surface pressure is minimum in grinding. It is suitable for light work,which will spring away from the cutting tool in the other machining processes.

Grinding operation

Types of grinding operation

1. Ruff or precision Grinding a) Snagging

b) Off-hand

2. Precision Grinding a) Surface grinding

b) Cylindrical grinding c) Center less grinding d) Form and profile grinding e) Plunge cut grinding

Grinding Process

Grinding is an abrasive machining process that uses a grinding wheel as the cutting tool.

Surface GrindingSurface grinding uses a rotating abrasive wheel to remove material, creating a flat surface.

Cylindrical GrindingCylindrical grinding (also called center-type grinding) is used to grind the cylindrical surfaces and shoulders of the workpiece.

1. External cylindrical grinding2. Internal cylindrical grinding

External cylindrical grinding

Internal cylindrical grindingInternal grinding is used to grind the internal diameter of the workpiece. Tapered holes can be ground with the use of internal grinders that can swivel on the horizontal.

Centerless grinding

Form and profile grinding

Form grinding is a specialized type of cylindrical grinding where the grinding wheel has the exact shape of the final product. The grinding wheel does not traverse the workpiece.

Plunge cut grinding

Infeed (Plunge) Grinding is used to grind workpieces which have projections or shoulders, multiple diameters or other irregular shapes which preclude the use of through feed grinding.For example :- Grinding of crank shaft.

Electrochemical grinding

Electrochemical grinding The wheels and workpiece are electrically conductive. Wheels used last for many grindings - typically 90% of

the metal is removed by electrolysis and 10% from the abrasive grinding wheel.

Capable of producing smooth edges without the burrs caused by mechanical grinding.

Does not produce appreciable heat that would distort workpiece.

Decomposes the workpiece and deposits them into the electrolyte solution. The most common electrolytes are sodium chloride and sodium nitrate  at concentrations of 2 lbs. per gallon