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能减少挤压工步数和制造零件用的金属消耗量的工艺过程方案之一是热挤压。在大多数情况下,为了进行挤压必须有增大下顶杆行程的压力机。但是在工厂缺乏专用热挤压设备时,可以采用标准型曲柄式热冲压机进行热挤压。哈尔柯夫运输机器制造厂研究了一种在曲柄式热压机上挤压杯、套筒形锻件的工艺过程和专用压模装备。按照旧工艺过程,花键套(图1a)在落锤锤头能力为4吨的锻锤上用开模模锻,然后在600吨剪切机上切除飞边和冲孔。由于原始毛坯的重量波动大到8％和锻件高度很高,所以在研究新工艺过程时采用反
One of the process options that can reduce the number of steps in the press and the amount of metal used to make the part is hot extrusion. In most cases, there must be a press that increases the travel of the jack under pressure for the extrusion. However, when the factory lacks a dedicated hot extrusion equipment, a standard crank type hot stamping machine can be used for hot extrusion. Kharkov Transportation Machine Works studied a process for pressing cup and sleeve-shaped forgings on a crank-type hot press and a special stamper. In the old process, the spline sleeve (Figure 1a) was die-forged on a forging hammer with a drop-hammer capacity of 4 tons, and the flash and punch was cut off on a 600-ton shear. As the original rough weight fluctuations up to 8% and high forgings, so in the study of new processes using anti