基于有限元法的精密锻造齿环齿顶折叠的研究
Analysis on Folding of Gear Top in Synchronizer Ring Precision Forging Based on FEM
邵长伟， 周 杰， 王梦寒， 汪丰林
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作者单位：（重庆大学 材料科学与工程学院, 重庆 400044）
中文关键字：钢质同步齿环；精密锻造；有限元法；镦挤；折叠控制
英文关键字：steel synchronizer ring; precision forging; FEM; upsetting and extruding, folding-controlling
中文摘要：针对钢质同步齿环在精密锻造成形过程中出现的小齿齿顶折叠现象，应用刚塑性有限元理论，利用专业塑性成形模拟软件对同步环的成形过程进行了模拟，获得了齿顶折叠的形成过程与机理。针对齿顶折叠形成的特点，借助塑性成形模拟软件进行了工艺优化，使齿顶的成形方式由原工艺的挤扩成形转变为镦挤成形，消除了齿顶折叠现象，获得了无折叠的齿环锻件。生产试制验证了研究结果的可靠性。
英文摘要： The folding of gear top in synchronizer ring precision forging was simulated using 3D rigid-plastic finite element method. The forming process and mechanism of the folding were mainly studied. Then the process was optimized by using FEM. The new process, the method of upsetting and extruding, replaced the radial extrusion, which eliminated the folding by using 3D FEM, and the results were verified by producing.