【摘 要】
：
一吨锻锤是我厂的关键设备,其工作繁重,使用频率极高.1991年11月锻锤发生了垫块断裂的严重事故,使生产任务严重受挫.垫块断裂面积达550×250mm~2.这样庞大坚固的铸钢件,为何
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一吨锻锤是我厂的关键设备,其工作繁重,使用频率极高.1991年11月锻锤发生了垫块断裂的严重事故,使生产任务严重受挫.垫块断裂面积达550×250mm~2.这样庞大坚固的铸钢件,为何会发生这样大面积的断裂,通过现场实地调查,认为有以下原因:1.垫块结构设计不合理.其燕尾槽结构如图1所示.垫块在上、下燕尾槽尖角处设置了4道10×5mm的退刀槽.这一方面使垫块危险断面面积减小,强度降低;另一方面使垫块在退刀槽尖角处容易造成应力集中,使垫块产生裂纹.
One ton forging hammer is the key equipment of our factory, its work is heavy and the frequency of use is very high. The severe accident of block breaking occurred in the forging hammer in November 1991, which seriously hampered the production task. The breaking area of the block reached 550 × 250mm ~ 2. Such a large solid steel, why such a large area of ?? fracture, through on-site field investigation, that the following reasons: 1. Pad structure design is not reasonable. The dovetail structure shown in Figure 1. Pad In the upper and lower dovetail corner set up 4 10 × 5mm backstroke groove on the one hand so that the block cut the risk of reducing the cross-sectional area, reducing the intensity; the other hand, the pad at the relief corner of the recess is easy Caused by stress concentration, the pad cracks.
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