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我厂于1983年购进1台四川内江锻压机床厂生产的J23—100冲床,其操纵系统由脚踏开关和单、双动按钮开关、牵引电磁铁、摇杆、定位螺栓、联接杆等构成。在生产中发现该冲床比其他同类型冲床撞击声音大,尤其是磁铁哐哐的撞声扰民。特别是在1984年1年中,定位螺栓、摇杆(见图)都因断裂而更换6次。生产厂也承认那批产品的失效形式都是定位螺栓、摇杆断裂。后来我们把定位螺栓的材质由碳钢改为低合金钢,摇杆也由铸铁改为碳钢、低合金钢等,几何尺寸也适当加大,但始终未能解决问题,仅是延长了断裂周期,而且每次的断裂面都在固定部位(见图)。为此,我们又从该机床的设计方面寻找原因。查阅该机床说明书得知牵引电磁铁的吸合力为250N,而挡
I plant in 1983 purchased a Sichuan Neijiang Forging Machine Factory production J23-100 punch press, the control system consists of foot switch and single, double action button switch, traction solenoid, rocker, positioning bolts, coupling rod, etc. . Found in the production of the punch punch than other punches of the same type of sound, especially the croaking of the magnet shackles nuisance. In particular, in the year of 1984, the bolts and rocker (see photo) were replaced 6 times due to fracture. Manufacturers also admit that the failure of those products are the form of bolt positioning, rocker fracture. Later, we dowel bolt material from carbon steel to low alloy steel, rocker also changed from cast iron to carbon steel, low alloy steel, the geometry is also appropriately increased, but failed to solve the problem, but to extend the fracture Cycle, and each fracture surface are in a fixed position (see figure). For this reason, we look for the reason from the design of this machine tool again. Check the machine manual that the traction solenoid pull force of 250N, while the block