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针对带有异形齿法兰的盘毂零件提出了热冷复合成形工艺。结合正交试验设计方法和有限元模拟技术对新工艺中热锻成形过程进行分析和工艺参数优化设计,以降低盘毂热锻成形峰值载荷、降低终锻件最大损伤值、减少模具磨损为评价指标,研究了坯料始锻温度、热锻件连皮厚度、下盲孔高度、挤压速度和润滑系数对热锻成形效果的影响,并获得了优化的工艺参数组合,即坯料始锻温度为1100℃、连皮厚度16.0 mm、下盲孔高度10.0 mm、挤压速度250 mm·s-1、摩擦系数0.2。经生产试验验证,优化后的盘毂热锻成形工艺能够为后续的冷精整工艺提供质量合格的锻件。
Aiming at the hub part with profile tooth flange, a hot and cold compound forming process was proposed. The orthogonal design method and the finite element simulation technology were used to analyze the hot forging process and optimize the process parameters in the new process so as to reduce the peak load of hot forging of the hub and reduce the maximum damage value of the final forging and reduce the mold wear as the evaluation index The effects of initial forging temperature, continuous skin thickness of hot forging, lower blind hole height, extrusion speed and lubrication coefficient on the effect of hot forging were studied. The optimized process parameters were obtained, that is, the initial forging temperature was 1100 ℃ , The thickness of the skin is 16.0 mm, the height of the lower blind hole is 10.0 mm, the extrusion speed is 250 mm · s-1 and the friction coefficient is 0.2. The production test shows that the optimized hot forming process of the hub can provide the qualified forgings for the subsequent cold finishing process.