Abrasive Disk Cutting

Abrasive Disk Cutting

Abrasive Disk Cutting-Cutting by means of rotating abrasive disk is really not a sawing operation, but it frequently is classified as such and done on the same equipment,

An abrasive disc cutting may be selected in preference to power hack sawing or friction sawing when a better surface finish and closer limits of accuracy are required. The finish and accuracy are 1.5-12.5 µm and 1.6 mm respectively.

Abrasive disks are used for cutting hard materials those may be especially difficult to machine by other methods.

An abrasive disk machine consists of a powerful drive motor which drives the wheel head by means of one or more belts, a method of engaging the wheel against the work by means of a swing frame, and a work holding vise or frame. The cut off wheel may be 0'13 mm thick.

Abrasive Disk Cutting

A-Operating
B-Abrasive cutting wheel
C-Vise

Abrasive disks may be of the following types

(i) Resinoid bonded wheels,
(ii) Rubber bonded wheels.
Abrasive disks are made in sizes up to 915 mm in diameter.

Resinoid bonded wheels are used in dry cutting of the materials. At operating speeds of about 5000 m/min, rapid heating of workpiece metal takes place, with the result that the metal is softened and easily removed.

Rubber bonded wheels are used with wet cutting process with a surface speed of about 2500 m/min. The surface speed is limited to this figure in order to retain sufficient coolant on the disk to prevent overheating. Cutting action in this case depends entirely upon the abrasive grains in the wheel and is not influenced by any' softening of the metal.