The steel positioning and
punching device for steel
machining comprises a bottom plate, a side plate is fixedly connected to the upper end of the bottom plate, the outer wall of the side plate is in a U shape, a shell is installed on the lower end face of the side plate, a
drill bit is installed in the shell, and connecting rods are fixedly connected to the outer walls of the two sides of an adjusting block correspondingly; a mounting groove is formed in the edge of the lower end of the connecting rod, an elastic
rope made of a fluororubber material is clamped in the mounting groove, and the horizontal height of the lowest point of the elastic
rope is smaller than the horizontal height of the connecting rod and the horizontal height of the end of the
drill bit. The elastic
rope is arranged to form a stable flexible fixing band on the outer wall of the
pipe, cooling liquid is effectively gathered and retained in a
punching area by the elastic rope after being sprayed to the hole opening, the cooling liquid is prevented from being lost along the outer wall of the arc-shaped
pipe, the hole opening can be fully covered with the cooling liquid, heat generated in the
punching process is taken away in time, and the punching efficiency is improved. And the overheating problem is prevented, so that the
machining precision and quality of the threaded hole are kept.