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针对法兰盘盲孔轴零件一次镦挤成形困难的问题,结合数值模拟分析对该零件镦挤成形工艺进行多次改进,确定了两次镦挤工艺方案。基于正交试验对改进工艺进行优化,综合折叠角大小、模具载荷及应力分布等因素,确定了最佳的工艺方案。结果表明:采用挤孔-法兰盘一次镦挤-法兰盘二次镦挤成形工艺可有效减小法兰盘拐角处的折叠角度,降低法兰盘开裂的风险;当压力机工作速度为2 mm·s-1,模具圆角R1=5 mm,模具圆角R2=2.5 mm,摩擦因子为0.05时,工件成形质量较优;最后进行实际生产并获得了表面质量良好的法兰盘盲孔轴零件。
Aiming at the difficulty of a single upsetting forming of the blind hole shaft parts of the flange, several improvements were made to the upsetting and extruding forming process of the part by numerical simulation analysis, and the two upsetting process schemes were determined. Based on the orthogonal experiment, the optimization process was optimized, and the factors such as the size of the folding angle, the load of the mold and the stress distribution were determined to determine the best process scheme. The results show that: the use of extrusion - a flange flange upsetting - flange second upsetting forming process can effectively reduce the corner of the flange angle of the fold, reduce the risk of flange cracking; when the press working speed of 2 mm · s-1, the roundness of the die is R1 = 5 mm, the roundness of the die is R2 = 2.5 mm and the friction factor is 0.05, the quality of the work piece is better. Finally, the actual production is achieved and the flange with good surface quality is obtained. Hole axis parts.