A Presentation on

GRINDING(abrasive cutting)

DEFINITION

SPECIFICATIONS

SURFACE GRINDING

CYLLINDRICAL GRINDING

CENTERLESS GRINDING

CONTENTS

Grinding is a process to produce a high quality surface finish with very less tolerance, it is also used for machining of hard materials. It has a grinding wheel which rotates at a very high pace along the circumference of the work piece.

WHAT IS GRINDING

• GRINDING WHEEL• ABRASIVES• BONDING ELEMENTS• GRIT• GRADE

SPECIFICATIONS

Grinding Wheel is an expandable wheel which carries an abrasive compound on its periphery. These wheels are made up of coarse particles, compressed together to form a circular wheel.

GRINDING WHEEL

Abrasives are very small pieces of any hard material, which can be used for cutting operationsEx) Diamond, Tungsten Carbide, Ceramic etc.

ABRASIVES

Bonding Material is the glue which is used to stick the ABRASIVES on the GRINDING WHEEL.Ex) Resin, Plastics, Rubber, Oxy-Chloride

BONDING MATERIALS

GRIT SIZE

COARSE

MEDIUM

FINE

12,14,18,20

36,42,54,60,70

90,100,120

ALL VALUES IN NANOMETERS

A

Z

F,G,H

I,J,K

L.M.O

WEAKEST BOND

STRONGEST BOND

WEAK BOND

MEDIUM BOND

STRONG BOND

GRADE

It is used to produce a smooth finish on a flat surface. Surface grinding is the most common of the grinding operations. It is a finishing process that uses a rotating abrasive wheel to smooth the flat surface of metallic or non-metallic materials to give them a more refined look or to attain a desired surface for a functional purpose.

SURFACE GRINDING

The surface grinder is composed of an abrasive wheel, a work holding device known as a chuck, and a reciprocating table. The chuck holds the material in place while it is being worked on.

is used in removing the cylindrical surfaces and shoulders of the work piece. The work piece is mounted and rotated by a holder, also known as a grinding dog or center driver. Both the tool and the work piece are rotated by separate motors and at different speeds. The axes of rotation tool can be adjusted to produce a variety of shapes.

CYLLINRICAL GRINDING

It is a method of material removal through grinding, similar to centered grinding except for the absence of the spindle. It has high throughput, i.e. a large number of parts can be manufactured in a short time.

CENTERLESS GRINDING

The work piece is set up between the regulating wheel and the grinding wheel, and is supported by the work). The work rest is located between the wheels. The work is placed upon the work rest, and the latter together with the regulating wheel is fed forward forcing the work against the grinding wheel.

AkSeC PrOdUcIoN

It’s An