Compared with drilling-expanding-reaming process, the bore size is not limited by the tool size, and the bore has strong error correction ability, which can correct the original hole axis skew error by several tool walks, and can make the bored hole and the positioning surface maintain high positional accuracy.
Compared with turning, the quality and productivity of boring are not as high as turning due to the poor rigidity and deformation of the tool bar system, poor heat dissipation and chip removal, and large thermal deformation of the workpiece and tool.
As we can see from the above analysis, boring can be done in a wide range of different sizes and accuracy levels, and it is almost the only method for holes and hole systems with large diameter, high size and position accuracy requirements. The machining accuracy of boring is IT9 to IT7 grade, and the surface roughness Ra is . Boring can be carried out on boring machines, lathes, milling machines and other machine tools, with the advantages of flexibility, production is widely used. In mass production, boring dies are often used to improve the efficiency of boring.
