Grinding Wheel Dressing
Dressing may be broadly defined as any operation performed on a wheel face to change the nature of its cutting action.
Why Grinding Wheel Dressing Needed?
Dressing is necessary when the individual grain crystal in the wheel face become dulled and the rate of stock removal is constantly decreasing as the grinding operation is prolonged without dressing.
Dressing is also necessary when the abrasive crystals or bond pores become loaded with metal or foreign matter, since this loading seriously affects the grinding action of the wheel.
Grinding Wheel Dressing Tools ( Wheel Dressers)
1) Diamond Dressers
Diamonds for dressing and truing grinding wheels are of several types, each having different characteristics.
“Multi-point”-An arrangement of twelve small set in a single plane in such a way that all stones contact the grinding wheel face simultaneously.
“Multi-Edge”-Three diamonds set in a line one behind the other, parallels to the wheel face. This tool is applied to the grinding wheel at a “down angle” and when the stones are flattened on one side from use, the tool is turned over.
2) Star Dressers
The Huntington or star type dresser has pointed discs loosely mounted on a pin, with solid discs as separators.
This type is exclusively used for dressing coarse grit wheels for snagging and offhand grinding and also for dressing segmental surface grinding wheels. It is low cost but requires some little skill in operation.
The Huntington dresser is the most efficient tool from the point of view of removing metal filling in general and the abrasive wheel type dressers are next in efficiency.
3) Precision Steel Type
This is popular and frequently used in place of diamond dressers for commercial grinding on precision grinding machines.
4) Abrasive Stick Dressers
These are of two shapes – square for hand manipulation and round for magazine mounting. Magazine mounting sticks find use in forming wheels for profile grinding and for dressing and truing relatively thin wheels.
Also Read : Grinding Wheels Types, Material & Specifications
5) Abrasive Wheel Dressers
These consist of properly bonded silicon carbide wheels rotably mounted in a suitable holder with high grade bearings. They will, in many cases, entirely replace the diamond on both center and centre less types of cylindrical grinding.
Their use imparts a smooth, clean cutting face which leaves no dressing marks on the work. With a few exceptions, since coolants are not generally used with the abrasive wheel dresser.
Diamond Dressers Specification
|Diamond Dressers||Carat||Use (Diameter)|
|HS020||2.0||600 mm & above|