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结合斜齿伞齿轮精锻成型的材料流动特点,确定了精锻工艺的坯料为圆管坯,并选择了外径定位的成形方式;建立了斜齿伞齿轮精锻成型工程的数值模拟仿真模型,研究了坯料高度值、坯料上端外径处圆角半径值及坯料偏置对成型过程的影响。研究发现,环坯的高度对成型过程中的最大载荷和应变均匀性有较大影响,坯料顶端外径圆角可消除充型时大端齿槽处因材料下翻产生的折叠,少量的坯料不对中对成形过程无影响,最终优化坯料高度为71mm,顶端外径处圆角为R10mm。
According to the material flow characteristics of the bevel bevel gear, the blank of the precision forging process is determined as a round tube blank, and the shaping method of the outer diameter positioning is selected. The numerical simulation model of the bevel gear is established , Studied the billet height, billet radius at the upper end of the radius and blank bias on the molding process. It is found that the height of the billet has a great influence on the maximum load and strain uniformity in the forming process. The fillet at the tip of the billet can eliminate the folding caused by the overturning of the gullets at the large end during filling, Misalignment has no effect on the forming process, the final optimization of billet height of 71mm, the top diameter of the fillet R10mm.