带阻力坎结构销轨锻模的设计及数值模拟分析

Design and simulation analysis on pin rail forging die with resistance ridge

热模锻压力机上采用两工位模锻工艺成形的销轨锻件,金属变形均匀、充填性好。对126型销轨热模锻压力机上模锻工艺进行理论设计,在预锻模的设计中采用了阻力坎形式的飞边结构,并对该飞边结构下的销轨成形质量、锻造载荷以及模具磨损情况进行了数值分析。通过数值模拟分析发现,在预锻模上采用阻力坎结构的飞边槽,能够大幅提高坯料金属充填型腔的能力,获得优质锻件,但容易导致成形载荷明显增大,需要进一步对阻力坎各部位进行尺寸优化,降低预锻模载荷。

The die forging technology of two stations in hot die forging press is adopted in the pin rail forging. Metal deformation is uniform and the filling is good. For a type 126 pin rail, its forging process in the hot forging press was designed theoretically, and the resistance ridge structure was used in the pre-forming die. The pin rail forming quality, forging load and die wear were simulated numerically. It is found that the resistance ridge structure used in the pre-forming die can significantly improve the ability of blank metal to fill the cavity and good quality forgings can be obtained. But it is prone to increase forming load significantly, and the optimization on the size of the resistance ridge needs to be further carried out to reduce load of the pre-forming die.