piercing die造句

• Abstract : this paper explains the design of piercing die for steel tube , especially the manufacturing process using bench worker ' s experience to reduce the manufacturing cost . meanwhile , it also introduces the design of bending die for steel tube using the principle of take - out - slug , which can improve the work efficiency
  文摘:介绍钢管冲孔模具的设计，如何利用钳工的操作技能来制造上、下冲孔模具，降低制造成本；以及不用抽芯块的原理来设计钢管弯曲模具，从而提高工作效率。