Grinding is the processing of a workpiece with a grinding wheel or other abrasive tools. This type of processing is relatively common. Its main movement is the rotation of the grinding wheel. The grinding process of the grinding wheel is actually the cutting, engraving, and sliding of the surface of the workpiece by the abrasive particles.
The comprehensive performance of this kind of effect, during the grinding process, the abrasive grain itself is gradually blunt from sharp, which makes the cutting effect worse and the cutting force becomes larger.
When the cutting force exceeds the strength of the binder, the blunt abrasive grains fall off, exposing a new layer of abrasive grains, forming the “self-sharpening” of the grinding wheel. However, cutting and crushing abrasive particles will still block the grinding wheel. Therefore, after grinding for a period of time, the grinding wheel needs to be corrected with a diamond turning tool.
When grinding, because there are many blades, the processing is relatively stable and the processing accuracy is relatively high. A grinding machine is a finishing machine. The grinding accuracy can achieve IT6-IT4, and the surface roughness Ra can achieve 1.25-0.01um. It can reach 0.1-0.008um.
Another feature of grinding is the ability to process hardened metal materials. Therefore, grinding is often used as the final processing procedure. During grinding, the heat generated is relatively large, and sufficient cutting fluid is required for cooling. According to different functions, grinding is generally divided into three processes: inner hole grinding, cylindrical grinding, and flat grinding.