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1985年6月我厂热处理车间在齿轮淬火时,当行车和电葫芦吊运的工件刚要入油淬火时,突然停电。电动葫芦在停电后,处于抱合状态,工件不再下降。在不知所措的瞬间,820℃的工件把近20t容量油槽的油面烤着而失火,造成了热处理车间5万多元的损失。为防止类似情况的发生,我们设计了如图所示热处理淬火安全防护装置。该装置只有淬火时才用。使用时上夹头A处孔用钢丝绳穿在电动葫芦的吊钩上,下夹头B孔处用钢丝绳与工件淬火架连接,齿轮装在淬火架上。在吊环处穿引钢丝绳,把另一端
June 1985 I plant heat treatment plant in the gear quenching, when driving and electric hoist lifting the workpiece just to be quenching oil, a sudden power outage. Electric hoist in the power outage, in the state of co-operation, the workpiece will not fall. At a loss at the moment, the workpiece at 820 ℃ to nearly 20t capacity oil tank surface grilled and misfired, resulting in heat treatment plant 50,000 yuan loss. To prevent this from happening, we designed a heat-treated quench safety device as shown in the figure. The device is only used when quenching. When using the hole on the clamp A hole rope hoist worn on the hoist, the hole under the chuck B with wire rope and workpiece quenching frame connection, the gear mounted on the hardened frame. In the rings wear wire rope, the other end