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The computer simulation and finite element analysis of cold forming are the hot spots of theoretical research. Many papers and research results have been published at home and abroad. How to simulate actual production problems can solve specific problems, which should be the basis of research and the basis of test results. According to the actual problems, we have done the double fold radius zero, the wide plate bag wave defect analysis, the simulation research of pre-punched shape distortion, and the related experiment verification.

One of the signs of the rapid development of modern automotive molds is the participation of CNC machining technology. The use of high-energy cutting tools is also pushing CNC machining technology to the next level. The close combination and mutual promotion of cutting and high-energy cutting tools greatly improve the production efficiency and shorten the manufacturing cycle of the mold.

The refrigeration industry knows that the key to refrigeration is refrigerant. Refrigerants are considered to be environmentally friendly, sub-environmentally friendly and non-environmentally friendly, energy-saving and non-energy-saving refrigerants. With the development of society and the advancement of technology, refrigerants have been updated and replaced.