From the material point of view, the work of grinding can be processed very wide range of materials, both cast iron, carbon steel, alloy steel and other construction materials in general, it is possible to process the high hardness of hardened steel, carbide, ceramic and glass and other hard cut materials.
However, compared to other machining methods, grinding can achieve smaller tolerances and good surface roughness. After rough grinding, surface roughness and dimensional tolerances may be larger, but smaller than that after turning and milling. Coarse precision higher, the more easily achieve a higher speed smaller dimensional tolerances during subsequent grinding process. Further, since the ratio of long-life wheel cutting tool, in most mass production assembly line, it is easy to achieve high-precision grinding and surface quality requirements. Under the same circumstances, turning difficult to deal with the problem of tool wear, tool management is a serious problem. In order to improve the precision and efficiency, accelerate the speed of the wheel surface is an effective means.
When the grains at high cutting speeds obsolete cut from the workpiece surface, while a lot of the cutting edge for cutting, cut each sharpening only a very small amount of metal on the workpiece, the height of a small residual area is conducive to the formation of smooth surface . Also use a faster surface speed of the wheel to reduce the work load of the individual grains, making it possible to improve certain metal removal rate. To be able to cut more metal layers, without sacrificing accuracy, CBN grinding wheel, the wheel must withstand high grinding force, so that the need to improve the rigidity of the machine. Problems caused by high wheel speed is to generate a lot of heat, which causes distortion, additional stress and other thermal effects. In addition, vibration and balance control also will be more difficult and take more costs. In order to reduce the sources of error, improve the grinding accuracy, by reducing the number of parts to simplify the structure of the machine. Fewer parts mean fewer connection points, stiffness.
Thus, designers are able to simplify the drive chain and drive components focused on new technology. For transmission parts, the most important development is the direct-drive spindle. Early design power transfer pulley and the pulley, which requires transmission, drive shaft, bracket, pulley tensioning device and other equipment shop help. The direct-drive spindle saved a lot of parts that increase costs, may result in errors and vibrations, thus limiting the dimensional accuracy and improve surface finish roughness. In order to simplify the transmission chain, the test can be used to control the linear motor concave cam angle and wheel feed system. With this compact drive instead of mechanical power head eliminates the tooth gap, friction, slippage and wear the gear lever. The results also give a fast speed, high precision, even very precise contour. Fewer parts means less chance of failure, greater reliability and less maintenance.
