The programming of thread milling tool is different from that of other tools. If the processing program is wrong, it is easy to cause tool damage or thread processing errors. The following points should be noted during preparation:
(1) first, the threaded bottom hole shall be processed well, and the small diameter hole shall be processed with a drill, and the larger hole shall be bored to ensure the accuracy of the threaded bottom hole.
⑵ when cutting in and cutting out, the cutter should adopt the arc track, usually 1/2 turn for cutting in or cutting out, and at the same time, the z-axis direction should travel 1/2 pitch to ensure the thread shape. The tool radius compensation value should be brought in at this time.
⑶ when the x-axis and y-axis arc are interpolated for one cycle, the main shaft should travel a pitch along the z-axis direction, otherwise, it will cause the threads to buckle disorderly.
(4) specific example procedure: the diameter of thread milling cutter is Φ 16, threaded hole M48 × 1.5, and the depth of threaded hole is 14.
