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传统的冷挤压工艺往往根据经验经过反复的试模修模后加以确定,生产周期长、成本高。基于Deform-3D软件,针对传动齿轮挤压出现的端部塌角磨损问题进行了数值模拟分析,优化成形工艺为一次复合挤压成形。分别对两种方案(优化的一次复合挤压成形和原有的正挤、镦挤两步成形)中的最大应力、最大应变、最大整体流动速度进行了分析。模拟结果表明,一次复合挤压成形同样可以得到形状精确的传动齿轮,而且具有更好的金属流动性能,说明传动齿轮一次冷挤压成形是可行的。
The traditional cold extrusion process is often based on experience after repeated trial mold repair mode to determine the long production cycle, high cost. Based on the Deform-3D software, the numerical simulation analysis of the end-to-end collapsing wear problem of transmission gear is carried out. The forming process is optimized by a single compound extrusion. The maximum stress, the maximum strain and the maximum overall flow velocity in the two schemes (optimized one-time compound extrusion and the original two-step forming of upsetting and upsetting) were respectively analyzed. The simulation results show that a compound extrusion can also get the shape of the precise transmission gear, and has better metal flow performance, indicating a cold extrusion gear forming is feasible.