The usage of ceramic superhard grinding wheel
The use of a grinding wheel is dangerous. For everyone's safety, the following are the precautions:
The grinder is one of the most commonly used machines and equipment in a machinery factory. Whether it is reasonable to install, whether it meets the safety requirements. Is it used correctly and in accordance with safe operating procedures? These problems concern the personal safety of every worker directly because this must cause us to take seriously enough in actual use.
1. A ceramic grinding wheel is a valuable abrasive tool, which is only used to process high hardness materials and is not suitable for grinding general steel or other soft materials.
2. After the ceramic wheel is mounted on the flange, it must statically balance before use. It should be noted that does not remove the flange from the wheel until it has run out.
3. For machine tools using ceramic grinding wheels, the rigidity is better. The spindles selection accuracy is higher (radial runout is not more than 0.01 mm), and it can be used for micro crossfeed.
4. The appropriate amount of grinding must be selected. The following data is available for reference:
(1) Grinding wheel line speed:
Metal bond: 110~15*/sec (dry grinding), 220~35*/sec (wet grinding).
Resin bonding agent: 115~30*/sec (dry grinding), 225~40*/sec (wet grinding).
(2) Work line speed: generally 10~15*/min.
(3) Grinding depth: the grinding depth is small, otherwise the grinding wheel wears quickly and the grinding efficiency is not necessarily high. Generally, it is preferably 0.005~0.01 mm/oxygen stroke. The finer the abrasive grain size, the smaller the grinding depth should be, especially if the coolant is not used.
Trimming of ceramic superhard grinding wheel
The dressing of the ceramic superhard grinding wheel is usually divided into two processes of shaping and sharpening. Shaping is a micro-cutting of the grinding wheel to achieve the required geometry and precision. And the abrasive tip is finely broken to form a micro-blade. Sharpening is to remove the bonding agent between the abrasives so that there is a certain space between the abrasives, and the cutting edge is formed by causing the abrasive to protrude beyond the bonding agent.
For multi-porous ceramic bond ceramic grinding wheels (including diamond and CBN grinding wheels), because the bonding agent is loose, usually shaping and sharpening can be done at one time. And for bonding agents with dense grinding wheels (such as resin and ceramic bonding agent), shaping and sharpening must carry out separately.
