我厂的自由锻锤设备中0.5吨蒸—空锤占有很大的比重。其配汽机构是手工操作的,滑阀与锤头运动没有一定的联系,亦没有保险缸,由保险钩(曲形杠杆)起保险作用。这种保险装置极不可靠,对工人的操作技术熟练程度要求极高。我厂锻造生产的特点是轴承套圈的单一性生产,生产率高,每班锤击次数多到数万次,并且轻重相间富有节奏性。在这种情况下,即使较熟练的司锤工也难免出现撞汽缸盖的事故。同时,在锤头以较快速度撞击保险钩时,会出现全程打击现象,操作把易打伤司锤手臂。为了改进保 0.5 tons of free hammer equipment in our plant steam - empty hammer occupy a large proportion. The steam unit with a manual operation, there is no connection between the slide valve and the hammer movement, there is no insurance cylinder, the insurance hook (curved lever) from the insurance role. This type of safety device is extremely unreliable and requires extremely high technical proficiency of the workers. Forging production of our factory is characterized by the production of single bearing rings, high productivity, the number of each hammer more than tens of thousands of times, and the rhythms of light and white. In this case, even a more skilled hammer operator is inevitably hit the cylinder head accident. At the same time, the hammer hit the hook at a faster speed, there will be full of combat phenomenon, the operation easy to hurt Secretary Hammer arm. In order to improve the security