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与锻造相比,奥贝尔变速轴的冷挤压成形不但能大大节约材料,减少机加工时间和工具消耗,而且有助于改善金属的金相分布,提高部件的强度。普通热加工的工作条件恶劣,然而采用这种冷挤压设备,噪音小,工作条件良好。最近,通用汽车公司在法兰克福附近新建的三个冷加工车间便采用了这种冷挤压技术,生产变速箱的输入轴和主轴。输入轴是由两台连在一起的Li-trasmatic卧式水压机加工的。这套设备每8秒钟完成5个工位的加工过程。机床的加载是自动的。工件由往复式传送机构的自动手从一个模具送到另一个模具上。料坯由热轧钢棒截成。有一种轴的料坯长为124.7毫米,直径为45毫米。工件在Blasberg自动线上进行磷化处理后,由棘爪送进储料仓。储料仓的带式升降机把料坯升起来,送到第一台机床的水平传送带上。
Compared with forging, the cold forming of the Oberr variable speed shaft can not only save material, reduce machining time and tool consumption, but also help to improve the metallurgical distribution of metal and improve the strength of components. Ordinary hot working conditions harsh, however, the use of cold extrusion equipment, low noise, good working conditions. This cold extrusion technology was recently used by General Motors in three newly-built cold workrooms near Frankfurt to produce gearbox input shafts and spindles. The input shaft is machined by two Li-trasmatic horizontal hydraulic presses connected together. The equipment completes the machining of 5 stations every 8 seconds. Machine loading is automatic. The workpiece is transferred from one mold to another by the automatic hand of reciprocating conveyor. Material billet cut from hot-rolled steel bar. A shaft blank has a length of 124.7 millimeters and a diameter of 45 millimeters. The workpiece is phosphated automatically on a Blasberg line and fed by a pawl into the magazine. Belt lifts in storage silos lifted the billet and delivered it to the first horizontal conveyor on the machine.