Tapping machine is a machine shell, end face, nut, flange and so on with different specifications of the hole or blind hole of the parts for inner side of the hole of internal threads, screws or tooth buckle of mechanical processing equipment. Tapping is a difficult process, the screw tap of the tapping machine is working under very harsh conditions. Because tapping machine screw tap is almost buried in the work piece in cutting, each tooth processing load is bigger than other tool, and screw tap along the screw thread and the work piece surface is very large, when cutting screw thread it must accommodate and ruled out chip. In order to successfully complete tapping, must grasp the following points.
1, work piece screw thread bottom hole orifice to chamfer, through-hole screw thread both ends to chamfer.
2, work piece clamp position correctly, try to put the center line of the threaded hole in horizontal or vertical position, tapping when convenient to judge screw tap axis whether perpendicular to work piece surface.
3, tapping, screw tap and through-hole must keep coaxality.
4, at the beginning of tapping, want to put the screw tap positive as far as possible, and then to tap to add pressure and roll drift holder, when cut into 1-2 circles, carefully check and correct the position of the screw tap.
5, just in case come across screw hole can’t attack, often withdraw from the screw tap, rule out the chip of hole.
6, tapping screw holes in different materials, need some assistance. Such as tapping plastic material screw hole, to add lubrication cooling fluid. Tapping steel material screw hole, use concentration larger emulsion; when the demand of work piece is higher, can use vegetable oil or molybdenum disulfide, etc. Tapping stainless steel screw hole, can use No. 30 engine oil or sulfide oil.