我厂3 T 自由锻锤是锻制钢阀体和外协大锻件主要生产设备,前段曾发生回程速度(抬锤)慢,打击无力等问题。经分析认为问题出自配汽机构,拆卸后发现滑阀阀体与汽缸体接触面处的石棉密封垫已老化烂掉,使进排汽窗口间有(2×50)mm~2的间隙。所以,虽然由外观上看不出汽体损失,而汽体在内部已经产 Our factory 3 T free forging hammer is forged steel valve body and the main production equipment for large forging, the back section has occurred before the return speed (lifting hammer) slow, weakness and other issues. After analysis, it is found that the problem comes from the steam distribution agencies. After disassembly, the asbestos gasket at the interface between the valve body and the cylinder block has been aged and rotted, resulting in a gap of (2 × 50) mm ~ 2 between the intake and exhaust windows. So, although the appearance of the vapor loss can not be seen, and the vapor has been produced internally