The characteristics of the ball screw are high processing accuracy and strict deformation requirements. Due to the many processing procedures, the heat treatment quality and deformation are very important. It was found in production that the workpiece was severely deformed after carburizing and quenching, and it was difficult to correct it. Large deformation also appeared in the processing after heat treatment, which caused a large number of product repairs and many workpieces to be scrapped. In order to ensure the performance of its mechanism and to facilitate the user to perform secondary processing, generally only the threaded part is quenched and heat treated, and the remaining parts can still be processed by machining.
It is often subjected to bending, torsion, fatigue, impact, and friction at the sliding and rotating parts. The main damage of the ball screw is wear and fatigue. In order to adapt to different applications in different occasions, manufacturers generally provide a wide range of specifications for users to choose from. The specifications of the mechanism are represented by a set of numbers, and the numbers can be directly selected when ordering. Different manufacturers have different numbering rules, but they are roughly similar. Just read the manufacturer's sample information carefully.
Due to the high friction resistance of the screw rod, the transmission efficiency is low. For example, in CNC machine tools, rolling screw transmission is often used instead of trapezoidal screw transmission. Because the rolled surface is relatively strong, and the surface finish is good. In addition, the rolling process can be used to process long bars, which can then be cut to any length. If high precision is required, a grinding process should be considered. However, the cost of the grinding process is much higher, probably 10 times.
How to prevent the ball screw from deforming after heat treatment
2021 12/31