The screw is mainly supported by two points or several fulcrums on the machine tool for rotational movement, and then pushes parts such as nuts for translation. When working, the threaded teeth of the lead screw and the nut slide relative to each other. After a long time, there will be a lot of friction between the two, and serious wear will affect the accuracy of the machining accuracy of the machine tool. It can be seen that the machine tool screw is often subjected to bending, torsion, fatigue, impact and other effects during work. At the same time, it must bear greater friction and contact stress. According to the service conditions and failure modes of the lead screw, the material for making the lead screw should be carbon structural steel or alloy steel. In terms of technical requirements, the high-frequency induction heating machine is selected for quenching heat treatment, so that the screw can obtain higher performance and life.
Since the screw as a whole must have a certain rigidity and strength, and cannot produce large bending and plastic deformation during work, the screw of the machine tool after quenching and tempering, carburizing, and quenching by a high-frequency induction heating machine has a better performance. Comprehensive mechanical properties and high dimensional stability. The parts connected with it also have high hardness, strength, contact fatigue strength and sufficient wear resistance. In addition, the lead screw is also required to have good geometric accuracy stability, and after heat treatment, the dimensional accuracy of the lead screw is not easy to change, and the corrosion resistance and heat resistance of the lead screw are improved.
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