1 high speed and efficient grinding process
(1) Ultra high speed grinding (cross roller bearing)
At ultra-high speed grinding, the line speed of the grinding wheel is greater than 150m/s. During the ultra-high speed grinding process, other parameters are kept unchanged. As the grinding wheel speed is greatly increased, the number of abrasive grains in the grinding area increases per unit time, and the thickness of the grinding debris cut by each abrasive grain becomes smaller. The thickness of each abrasive grain is thinned during high speed grinding. Experiments have shown that the cross-sectional area is only a few tenths of that under ordinary grinding conditions, which results in a greatly reduced grinding force per abrasive grain and a large reduction in total grinding force. In the ultra-high speed grinding, the moving speed of the abrasive grains on the grinding zone and the feed rate of the workpiece are greatly accelerated, and the influence of the temperature hysteresis of the strain rate response causes the surface grinding temperature of the workpiece to be lowered, so that it can be crossed. It is prone to the area where the burn is burned, which greatly expands the application range of the grinding process parameters. Ultra-high speed grinding can greatly improve grinding efficiency, extend wheel life and improve surface roughness. Ultra-high-speed grinding can grind hard and brittle materials, and also has good grinding performance for hard materials such as high plasticity. At the same time, ultra-high speed grinding shortens the processing time, thereby reducing energy consumption and reducing noise pollution.
(2) High-efficiency deep grinding (turntable bearing)
In the high-efficiency deep grinding technology, the grinding wheel has a speed of 100 to 250 m/s, a feed rate of 0.5 to 10 m/min, and a depth of cut of 0.1 to 30 mm. Efficient deep grinding is a combination of slow feed grinding and ultra high speed grinding. High-efficiency deep grinding can achieve a rough removal process consisting of multiple processes such as turning, milling and grinding through a grinding stroke, and obtain a metal removal rate much higher than that of ordinary grinding. The surface quality can also reach the ordinary grinding level.
（3）Slow feed grinding (cross tapered roller bearings)
In the high-efficiency deep grinding technology, the grinding wheel has a speed of 100 to 250 m/s, a feed rate of 0.5 to 10 m/min, and a depth of cut of 0.1 to 30 mm. Efficient deep grinding is a combination of slow feed grinding and ultra high speed grinding. High-efficiency deep grinding can achieve a rough removal process consisting of multiple processes such as turning, milling and grinding through a grinding stroke, and obtain a metal removal rate much higher than that of ordinary grinding. The surface quality can also reach the ordinary grinding level.
（4）Abrasive belt grinding
The belt grinding process is to place the endless belt on the outer circumference of the contact wheel and the tensioning wheel. In the tension state, a method of grinding the surface of the workpiece by contacting the surface of the high-speed rotating abrasive belt with the machined surface of the workpiece and generating a relative frictional motion under a certain pressure. Abrasive belt grinding efficiency is 10 times that of milling and 5 to 20 times that of ordinary grinding wheel.
