Characteristics and applications of thread milling cutter

The traditional thread processing method uses tap tapping, which has low efficiency and is difficult to ensure the precision of thread processing, and it is easy to lead to the scrap of the workpiece after the tap breaks. In modern thread machining, milling method has been gradually used to replace the traditional machining method. Its advantage is that the machining efficiency is high, and the machining precision can be well controlled by tool selection and adjusting machining parameters. Tool versatility is good, for the same pitch, different diameter of the thread hole, the tap processing needs more tools to complete, but if the thread milling cutter processing, the use of a tool can be; High processing safety, the use of spiral interpolation milling do not have to worry about the negative effects of tool damage, thread milling as shown in the figure.

As a new type of thread processing technology, thread milling has its unique advantages and a wider range of flexible uses and applications compared with tapping.

(1) High processing efficiency. Thread milling cutter milling speed is not only high, and its multi-slot design increases the number of cutting edges so that the feed speed can be easily increased, so that the processing efficiency can be greatly improved. In the processing of long threads, a blade with a longer cutting edge can be selected to reduce the axial feed distance (equivalent to making the thread shorter) to further improve the processing efficiency.

(2) High surface quality and dimensional accuracy. Thread milling cutter milling high cutting speed, small cutting force makes the cutting surface very smooth; The fine chips can be easily rushed out of the workpiece by the cutting fluid without scratching the machined surface, which is suitable for the workpiece with higher requirements of thread accuracy.

(3) Good stability, safe and reliable. Because the thread milling cutter is gradually cut into the material, it produces a small cutting force and rarely breaks the knife. Even in the event of a broken cutter, because 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.

(4) Wide range of applications. The thread milling cutter is flexible and can be used in a variety of working conditions. For example, the same thread milling cutter can be used to process left-handed threads and right-handed threads; Both external and internal threads can be processed. Thread milling cutter diameter is smaller than the hole, and must be reversed to obtain a complete and accurate thread depth.