挤压是金属在压缩应力状态下使材料变形的一种加工方法,它可以进行断面减缩率大的加工,是适应于生产各种挤压制品的工艺。但是,通用的挤压方法,每个坯料挤压后需除掉压余,然后再把新的坯料放入挤压筒内,因而操作中间有增加非生产时间的缺点。对此,近年来试图用连续供给坯料来提高生产率,提出了各种连续挤压方法。连续挤压是对坯料直 Extrusion is a kind of metal deformation process in the state of compressive stress, it can be processed with a large reduction of area, and is suitable for the production of various extrusion products. However, in the conventional extrusion method, each blank is squeezed to remove the excess pressure, and then the new blank is placed in the extrusion barrel so that there is a disadvantage of increasing the non-productive time in the middle of the operation. In response to this, in recent years, attempts have been made to improve the productivity by continuously supplying billet, and various continuous extrusion methods have been proposed. Continuous extrusion is the blank straight