模具是机械、轻工、国防等工业部门的重要工艺装备,汽车、拖拉机、轴承、电机、电器、仪器仪表、自行事、电视机、手表、日用五金、塑料等产品的零件60～90％需用模具加工成形。在推广冷镦、冷挤、精冲、精锻、辊锻、压铸、工程塑料、粉末冶金等少无切削新工艺中,模具已成为关键环节。模具技术水平的高低直接影响生产效率、产品质量和成本,也影响产品的改型和更新。模具技术不但对发 Mold is an important process equipment in the industrial sectors such as machinery, light industry and national defense. 60 ~ 90% of the parts of automobiles, tractors, bearings, motors, electrical appliances, instruments, self- Need to use mold forming. In the promotion of cold heading, cold extrusion, fine blanking, precision forging, roll forging, die-casting, engineering plastics, powder metallurgy and other less cutting new technology, the mold has become a key link. The level of mold technology directly affects the production efficiency, product quality and cost, but also affect the product modification and updating. Die technology not only made