CAJ | 학술논문

目的：研究大直径带毂直齿轮冷精密成形新工艺。方法根据大模数大直径带毂直齿轮结构特点，提出了冷精密成形的难点和解决基本方法。基于分流减压和多工步成形原理，提出了3种可行工艺方案。采用 Deform 软件对工艺方案进行数值优化模拟，分析了方案二锻件成形过程的速度矢量、温度、应力和模具应力，阐述了成形原理。结果采用优化的新工艺可以减小载荷降低模具应力，齿形金属充填饱满。结论巧妙的分流面设计使大直径带毂直齿轮冷精密成形成为可能，新工艺能够为生产实践提供指导意义。
목적：연구대직경대곡직치륜랭정밀성형신공예。방법근거대모수대직경대곡직치륜결구특점，제출료랭정밀성형적난점화해결기본방법。기우분류감압화다공보성형원리，제출료3충가행공예방안。채용 Deform 연건대공예방안진행수치우화모의，분석료방안이단건성형과정적속도시량、온도、응력화모구응력，천술료성형원리。결과채용우화적신공예가이감소재하강저모구응력，치형금속충전포만。결론교묘적분류면설계사대직경대곡직치륜랭정밀성형성위가능，신공예능구위생산실천제공지도의의。
Objective To study the new cold precision forging process of large-diameter spur gear with hub. Methods Based on the geometric feature of large module and large-diameter spur gear with hub, difficulties in cold precision forming and the corresponding solving methods were proposed. Based on the principle of distributary and decompression and the multi-step forming, three feasible technology schemes were put forward. The processes were numerically simulated using Deform-3D, different process schemes of different stages were analyzed. Further, the velocity vector, temperature, equiv-alent stress and die stress of scheme 2 were analyzed, and the forming principle was explained. Results The new optimal process could reduce the load and the die stress, and the tooth-shaped metal was fully filled. Conclusion The ingenious design of flow diversion face makes the cold precision forming of large-diameter spur gears with hub possible, and the new process can provide guidance for production practice.