The production process of self-tapping screw: first buy the round steel cold drawn steel wire, the head machine is blanked into billet - the thread rolling machine is rolled out - the heat treatment line is carburized, quenched, tempered - the line is phosphating or blackening. The head machine is a horizontal punching machine, the wire rolling machine uses two wire rolling plates for thread processing, the heat treatment equipment is a steel soft mesh line, the quenching furnace uses acetone as fuel, and the equipment is installed in the pit. This is Taiwan equipment production, a high degree of automation, the specific model of the equipment is unknown.
For example, how much is the pitch of M3 to follow up, Frank system: program head T0 M06; G43 H0 Z50; M03 S400; G84 X.. Y.. Z.. F0.45; M3 pitch 0.5 (coarse teeth), tap feed calculation: speed * pitch.
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CNC milling machine is developed on the basis of the general milling machine, the processing technology of the two is basically the same, the structure is also somewhat similar, but the CNC machine tool is an automatic processing machine controlled by the program, so its structure is also very different from the ordinary milling machine.