Shanghai Jinxi is a professional supplier for cnc quality parts,today we will share what guidelines we always use for those custom machining parts.
Firstly, in order to ensure machining accuracy, roughing and precision machining should be carried out separately. Because there is big cutting volume during rough machining, the workpiece will undergo heavy cutting and clamping force, also more heat emission, and the machining surface will get significant hardening,and there is a large internal stress within the workpiece. if the roughing and finishing continuous processing, the finishing accuracy of the parts will be losing because of the internal stress. For some high precision machining parts, we should also organize low-temperature annealing or aging treatment process to eliminate internal stress between roughing and finishing.
Secondly, a good choice of machine equipment. Rough machining of mechanical parts is mainly to cut off most of the processing margin, and does not require high precision, so roughing should be done in a larger power, not high precision machine tool,while precision machining requires more accurate machine tools processing. Roughing and finishing should be processed in different machine tools, not only can give full play to the ability of equipment, but also to extend the life of fine machine tools.
Thirdly, during the machining processing, it often requires heat treatment. Heat treatment location is as follows: to improve the metal cutting and processing performance, such as annealing, normalizing, quenching and tempering, etc., the general organization in the machining process before. In order to eliminate internal stress, such as aging treatment, quenching and tempering treatment, etc., the general organization in the roughing, finishing before machining. In order to improve the mechanical properties of the parts, such as carburizing, quenching, tempering, etc., the general organization in the mechanical processing after. If there is a big deformation after heat treatment,we need to reorganize the final machining process. if there is a big deformation after heat treatment,we need to reorganize the final machining process.
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