How to prevent the deformation of the screw after heat treatment

The screw is characterized by high machining accuracy and strict deformation requirements. Because of many processing procedures, heat treatment quality and deformation are very important. It was found in the production that the bending deformation of the workpiece after carburizing and quenching was serious and it was difficult to correct. Moreover, large deformation also appeared in the processing after heat treatment, resulting in the repair of a large number of products and scrap of many workpiece. In order to ensure the performance of the mechanism, and convenient for users to carry out secondary processing, generally only the thread part of the quenching heat treatment, the rest of the parts can still be machined. Its work is often subjected to bending, torsion, fatigue, impact, and sliding and rotating parts of the friction action. The main forms of screw damage are wear and fatigue.

In order to adapt to the different use of different occasions, manufacturers are generally able to provide a variety of specifications for users to choose, the specifications of the mechanism is represented by a set of numbers, ordering can directly choose the number. Numbering rules vary from manufacturer to manufacturer, but are generally similar. Just read the manufacturer's sample information carefully. Because of the friction resistance of the screw, the transmission efficiency is low, such as in numerical control machine tools, often use rolling screw drive instead of trapezoidal spiral drive. Because the rolling surface is more solid, and the surface finish is good. In addition, the rolling process can be used to treat long bars, which can then be cut to any length. If high accuracy is required, a grinding process should be considered. However, the cost of the grinding process is 10 times higher.