There are three methods for machining threads with CNC: thread milling, tap machining, and picking machining. Today, I will introduce you to tap machining. The tap processing method is suitable for threaded holes with small diameters or low hole position accuracy requirements. Generally, the diameter of the threaded bottom hole drill is close to the upper limit of the threaded bottom hole diameter tolerance, which can reduce the machining allowance of the tap and reduce the load of the tap , But also improve the service life of the tap.
Everyone should choose the appropriate tap according to the material to be processed. The tap is very sensitive to the material being processed compared to the milling cutter and boring tool. The tap is divided into through-hole taps and blind-hole taps. For the front chip removal, the processing depth of the thread cannot be guaranteed when processing the blind hole, and the front end of the blind hole is shorter, which is the rear chip removal, so pay attention to the difference between the two; when using flexible tapping chucks, pay attention to the diameter of the tap shank The width of the square and the square should be the same as that of the tapping chuck; the diameter of the shank of the tap for rigid tapping should be the same as the diameter of the spring collet.
The programming of tap processing method is relatively simple, all are in fixed mode, just add parameter value, it should be noted that the format of the subroutine is different for different CNC systems, and the representative meaning of the parameter value is different.
Post time: Oct-22-2021