What are the processing principles for mechanical processing in Changzhou?
There are three specific processing principles for mechanical processing, which are:
(1) To ensure machining accuracy, rough and fine machining should be carried out separately. Due to the large cutting amount during rough machining, the workpiece experiences high cutting and clamping forces, generates more heat, and exhibits significant work hardening on the machining surface. There is a significant internal stress in the workpiece. If rough and rough machining are carried out continuously, the precision of the precision machined part will be quickly lost due to the redistribution of stress. For certain parts that require high machining accuracy. After rough machining and before precision machining, low-temperature annealing or aging treatment should also be arranged to eliminate internal stress.
(2) Reasonably select equipment. Rough machining mainly involves cutting off most of the machining allowance and does not require high machining accuracy. Therefore, rough machining should be carried out on machine tools with high power and low precision, while precision machining requires the use of larger machine tools. Rough and fine machining are processed on different machine tools, which can fully utilize the equipment's capabilities and extend the service life of precision machine tools.
(3) In mechanical processing technology routes, heat treatment processes are often arranged. The arrangement of heat treatment process positions is as follows: in order to improve the cutting performance of metals, such as annealing, normalizing, quenching and tempering, they are generally arranged before mechanical processing. To eliminate internal stress, such as aging treatment, quenching and tempering treatment, etc., it is generally arranged after rough machining and before precision machining. In order to improve the mechanical properties of parts, such as carburizing, quenching, tempering, etc., it is generally arranged after mechanical processing. If there is significant deformation after heat treatment, final processing procedures must also be arranged.