薄壁深筒零件,国内外主要的生产工艺是:板材多次拉深或棒材预成形后多次延伸。这类工艺的缺点是:压机效率低,工艺周期长,废品率高,制件几何精度低。在大批量生产条件下,远远不能满足多快好省的要求。近年发展起来的冷挤压技术,可以生产薄壁深筒,并比上述工艺具有一定的优越性。但对一些变形抗力很高的材料以及挤压比很大的零件,则需要大吨位压机和高强度模具。这一 Thin-walled deep-tube parts, the main production process at home and abroad are: multiple drawing plate or bar after pre-forming extended several times. Disadvantages of this type of process are: low press efficiency, long process cycles, high rejection rates, and low geometry accuracy. Under the conditions of mass production, it is far from satisfying the requirements of a more efficient and economical province. In recent years, the development of cold extrusion technology, can produce thin-walled deep tube, and the above process has some advantages. However, some materials with high deformation resistance and high extrusion ratio require large tonnage presses and high-strength dies. This one