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随着内燃机向高转速、大功率方向发展,对曲轴机械性能和加工性能的要求越来越高。一般小型的内燃机曲轴,早就用模锻方法进行大量生产了。但高转速和大功率的柴油机曲轴,因受模锻设备能力的限制,除部分采用组合式曲轴外,整体曲轴多数仍用自由锻造方法生产,耗料多、生产率低、质量差、成本高,适应不了柴油机向高转速和大功率方向发展的需要。因此,曲轴的镦锻就有着极其重要的意义。国内在五十年代开始试验这一工艺,于一九六五年前后投入批量生产。我厂与四方机车车辆厂、戚
As the internal combustion engine to high-speed, high-power direction, the crankshaft mechanical properties and processing performance requirements are higher and higher. Generally small internal combustion engine crankshaft, has long been used forging method for mass production. However, the high-speed and high-power diesel engine crankshafts, due to the limited capacity of forging equipment, in addition to some of the combined crankshaft, the crankshaft is still the majority of the entire free-forging method of production, consumption and more, low productivity, poor quality, high cost, Can not adapt to the diesel engine to high-speed and high-power direction of development needs. Therefore, crankshaft upsetting has a very important significance. In the 1950s, China started to test the process and put into mass production around 1965. I plant and the Quartet rolling stock plant, Qi