当生产规模不大需要经常更换加工件时,采用可伸缩式冲头可以缩短非生产工时提高工效;而且由于一模多用,使工具费大大降低。 本文提出一些可伸缩式冲头采用的结构。 图1和图2是一种结构简单而成本又低的结构。往下拧动孔内的两个调节螺钉(如图1所示)时,冲头是工作的;退回螺钉 When the production scale is not large need to frequently replace the processing parts, the use of retractable punch can shorten the non-productive hours to improve work efficiency; and because of a multi-purpose, so that tool costs greatly reduced. This paper presents some retractable punch used in the structure. Figure 1 and Figure 2 is a simple structure and low cost structure. The punch is working when the two adjustment screws in the hole are screwed down (as shown in Figure 1); the screws