类似QJ40型钢筋切断机的冲切刀座及刀片,其结构都相似,这说明它的共性和适用性。在使用过程中发现,冲切刀座(以下称刀座)及刀片存在如下问题: 1.刀床面(以下称床面)容易形成拱弧面(见图1)。其主要原因:(1)床面短,刀刃端伸出长达22.5mm。由于刀刃伸出过长,就难以克服冲切产生的轴向压力。刀刃伸出越长,床 Similar to the punching cutter seat and blade of the QJ40 rebar cutting machine, its structure is similar, which shows its commonality and applicability. During use, it is found that the following problems exist in the punching knife seat (hereinafter referred to as the knife seat) and the insert: 1. The knife-bed surface (hereinafter referred to as the bed surface) is likely to form an arcing surface (see Fig. 1). The main reasons are as follows: (1) The bed surface is short, and the blade end extends up to 22.5mm. Because the blade extends too long, it is difficult to overcome the axial pressure generated by the punching. The longer the blade extends, the bed