At present, the general situation of precision machining in Dalian is that world-class machine tools do second-class or even third-class products. Although the country has invested a lot of human, material and financial resources in some cutting-edge manufacturing fields, such as military industry and aerospace, most precision machining industries are still in the current situation of "making second-class or even third-class products with world-class machine tools".

It's mainly water and additives. It's called antifreeze because it has the function of antifreeze. It is understood that China's foundry industry is currently in a transitional period of development from a large foundry country to a powerful foundry country, with large cutting volume, large cutting force and clamping force on the workpiece, large calorific value, significant work hardening on the machined surface, and large internal stress in the workpiece. If rough and rough machining are carried out continuously, The precision of finished parts will be lost quickly due to the redistribution of stress. For some parts requiring high machining accuracy.

In terms of hardware, there are many kinds of mechanical equipment for the processing of mechanical parts, such as lathe, milling machine, planer, grinder, broaching machine and machining center. The inherent machining accuracy of various equipment is different. Therefore, to realize precision machining, it depends on how high the precision of your parts is, and the corresponding process route and equipment should be selected accordingly. Machining refers to the process of changing the overall dimension or performance of the workpiece through a kind of mechanical equipment. According to the difference of machining methods, it can be divided into cutting and machining.

It is called cold working when it is processed at room temperature but does not cause chemical and physical changes to the workpiece. In the process of production and processing in the machinery industry, although some details are very inconspicuous, if we can get enlightenment from them, draw inferences from one instance, use our brains and find ways, it will still be of great help to our work. In order to improve the mechanical properties of parts, such as carburizing, quenching, tempering, etc.