Drilling machine refers to a machine tool that mainly uses a drill to make holes in a workpiece. Usually the rotation of the drill bit is the main movement, and the axial movement of the drill bit is the feed movement. The drilling machine has a simple structure and relatively low processing accuracy. It can drill through holes and blind holes, replace special tools, and can expand, counter-hole, ream or tapping. During processing, the workpiece does not move, the tool is moved, the center of the tool is aligned with the center of the hole, and the tool is rotated (main movement). The characteristic of the drilling machine is that the workpiece is fixed and the tool rotates.