Fastener knowledge: common advantages of thread milling

With the development of economy and technology, the technology of thread milling is becoming more and more advanced. Thread milling is through the three-axis linkage of CNC machine tools, using thread milling cutters for spiral interpolation milling to form threads, and the tool makes a circular motion on the horizontal plane. , In the vertical plane, it moves a pitch in a straight line. There are many advantages of thread milling, our common advantages are the following three.

1. High processing efficiency

We know that in mass thread processing, it is very difficult to improve the processing efficiency due to the relatively low cutting speed limit of the tap and the reverse retraction after the thread is processed. However, if we use a thread milling cutter (such as MiTM from VARGUS), not only does it have a high milling speed, but its multi-slot design increases the number of cutting edges so that the feed speed can be easily increased, which can greatly increase Processing efficiency. In the processing of long threads, we can also choose blades with longer blades to reduce the axial feed distance (equivalent to shortening the thread) to further improve the processing efficiency.

2. Excellent surface quality and dimensional accuracy (Guide: Five troubleshooting methods for fastener phosphating defects)

When machining with a tap, it is quite difficult to obtain a good surface finish and thread accuracy due to the influence of the lower cutting speed and difficult chip breaking. However, everything is not a problem for thread milling! The high cutting speed and small cutting force make the cutting surface very smooth; the fine chips can be easily flushed out of the workpiece by the coolant without scratching the machined surface. For workpieces with higher thread accuracy requirements, because thread milling cutters rely on spiral interpolation to ensure accuracy, you only need to adjust the program to easily obtain the required high-precision threads. This feature has an absolute advantage in precision thread processing.

3. Good stability, safety and reliability

When processing difficult-to-machine materials such as titanium alloys, high-temperature alloys and high-hardness materials, the taps are often twisted or even broken in the parts due to too much cutting force. In the processing of long chip materials, once the chip removal is not smooth, the chips will wrap around the tap or block the orifice, often causing the tap to collapse or break in the part. Taking out the broken tap is time-consuming and laborious and may damage the parts. To solve this problem, we can use thread milling cutters. Because the thread milling cutter cuts into the material gradually, the cutting force it generates is small and the tool breaks rarely. Even in the event of a broken tool, since the diameter of the milling cutter is much smaller than the threaded hole, the broken part can be easily removed from the part without damaging the part.

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