Diamond Blade Select » Grinding Tool

3 Making Modes of Metal-Bonded Diamond Grinding Wheels

Hanjiang Wang — Mon, 11 Jan 2010 04:28:36 +0000

Metal bonds are widely used in diamond grinding wheels‘ manufacture. Among these metal bonds, Cu-Sn alloy is the mainly adopted bond. There are 3 modes in the metal-bonded diamond grinding wheels’ making.

1) Cold-Press Mode: This mode is to first press the working layer (containing diamonds) and the transition layer (not containing diamonds) of the diamond segments to their forms directly on the grinding wheel’s body, and let the segments connect with the wheel’s body via teeth, slots or other manners. Then, put the grinding wheels into sintering furnaces to sinter without press.

2) Semi-Hot-Press Mode: This mode is an improved version of the cold-press mode. When the diamond grinding wheels are being sintered in the furnace, appropriate molds will be applied and some pressure will be added, but the pressure is much lower than the one in the hot-press mode.

3) Hot-Press Mode: This mode is to directly sinter the diamond segments in molds under a certain pressure in the dedicated sintering press machine, and then fix or connect the diamond segments onto the grinding wheel’s body via high-frequency welding, laser welding or mechanical mosaic method.

Advantages of Diamond Grinding

Hanjiang Wang — Tue, 29 Dec 2009 10:24:34 +0000

As diamonds have many excellent mechanical properties, for example, high hardness, big strength, good wear resistance and low friction coefficient, they have obvious advantages when being used in grinding contrasting with the common abrasives.

1) Diamond grinding is efficient, and the grinding force of it is small. The grinding temperature generated during it is lower. This can avoid burns and cracks on the surface of the workpiece.

2) Diamond grinding’s quality is good, and its precision is high.

3) The diamond grinding tools’ consumption is low, and the tools have a longer service life. This can reduce the processing costs.

4) The processing conditions of equipment, tools and workpieces can be improved, and the energy consumption can be reduced. Also, the working conditions of the operators can be improved.

5) Diamond tools not only can process materials which common tools can not process, but also create conditions for developing new materials and new equipment.

How to Keep Grinding Tools

Hanjiang Wang — Sun, 31 May 2009 08:48:25 +0000

Grinding Tools are normally brittle, and in most cases are used in the status of high-speed rotation, so they should be kept carefully from being damaged. Below are some tips:

In long-distance transportations, grinding tools should be packed properly, and be separated with soft materials to avoid collisions between them.
Ceramic grinding tools can not be placed in wet or frozen places, rubber grinding tools can not be contacted with oil, and resin grinding tools can not be contacted with alkalis, otherwise their toughness and grinding capacity will be lowered.
Grinding tools should be kept in dry places, and the environment temperature should not be lower than 5°C.
Different specifications of grinding tools should be placed separately where labels are set to avoid confusions. The placement method should be determined according to the grinding tools’ shapes and sizes. The big-diameter or thick ones should be placed vertically or a little bit obliquely; the small-diameter or thin ones should be placed horizontally and in stacks. The stacks should not be too high, and two flat iron plates should be placed respectively on and beneath one stack to prevent the grinding tools from being deformed or broken.
The storage period of grinding tools made of organic materials normally should not be over one year. The expired grinding tools should be tested to check their toughness. The grinding tools having been maintained should also be re-tested before being used.