Compared with the drilling-expanding-reaming process, the aperture size is not limited by the tool size, and the boring has a strong error correction ability. The deviation of the original hole axis can be corrected through multiple passes, and it can make The boring and positioning surface maintain high position accuracy.

Compared with the outer circle of the car, due to the poor rigidity and large deformation of the tool holder system, the heat dissipation and chip removal conditions are not good, the thermal deformation of the workpiece and the tool is relatively large, and the processing quality and production efficiency of the boring are not as high as the outer circle of the car. .

From the above analysis, it can be seen that boring has a wide processing range, and can process holes of various sizes and different accuracy levels. For holes and hole systems with large diameters, high size and position accuracy requirements, boring is almost the only processing method. method. The machining accuracy of the boring is IT9～IT7, and the surface roughness Ra is. Boring can be carried out on machine tools such as boring machines, lathes, milling machines, etc. It has the advantages of mobility and flexibility, and is widely used in production. In mass production, in order to improve boring efficiency, boring dies are often used.