There are many kinds of fixing devices. There are no machine tools or fixtures of any kind on the equipment. Simply put, the basic fixture of lathe is three-jaw chuck and four-jaw chuck, and the basic fixture of milling machine is vice. These are general equipment. Of course, in production, technicians can also design some special fixtures to improve the processing efficiency according to the characteristics of the processed products. Of course, I can't describe the strange shapes of special fixtures, but they all have two similarities: positioning device and clamping device. There are too many contents, which are omitted here.