目的 针对轮毂轴承法兰盘生产过程存在的成形工序多、生产效率低等问题,根据某型号第三代轮毂轴承法兰盘的结构特点,提出一种多向分流成形工艺,以提高生产效率及材料利用率。方法 首先将高温压缩实验得到的轮毂轴承法兰盘所用材料GCr15钢的真应力-真应变曲线导入Deform-3D中,对轮毂轴承法兰盘的多向分流成形过程进行了模拟分析,分析各冲头载荷-时间曲线、合模力、工件的等效应力场分布、等效应变场分布、关键模具应力分布等。然后根据模拟结果设计相应的模具结构并进行工艺试验研究,最后根据工艺流程设计基于总线控制的自动化生产单元,对生产单元布局及生产单元节拍进行研究。结果 试验得到的轮毂轴承法兰盘锻件充填饱满,没有发现折叠和裂纹等锻造缺陷,经过尺寸检测,均符合锻件图要求,与模拟结果一致性较好,且试验得到的各冲头的最大成形力和模拟得到的各冲头最大成形力误差均不超过3.24%,生产单元节拍为24 s。结论 本文提出的轮毂轴承法兰盘多向分流成形工艺是可行的,能有效提升轮毂轴承法兰盘锻件的材料利用率与生产效率,对该类零件的无飞边成形工艺及自动生产单元建设具有一定的指导意义。
Abstract
To solve the problems of many forming processes and low production efficiency in the production of hub bearing flanges, the work aims to propose a multi-directional split forming process according to the structural characteristics of the third generation hub bearing flange, to improve the production efficiency and material utilization. Firstly, the true stress-strain curve of GCr15 steel, which was obtained from high temperature compression experiment, was imported into DEFORM-3D, and the multi-directional split forming process of hub bearing flanges was simulated and analyzed. The punch load time curve, clamping force, equivalent stress field distribution of workpiece, equivalent strain field distribution, and stress distribution of key dies were analyzed. Then, according to the simulation results, the corresponding die structure was designed and the process test was carried out. Finally, according to the process flow, the automatic production unit based on bus control was designed, and the layout and beat of the production unit were studied. The hub bearing flange forgings obtained from the test were fully filled, and no forging defects such as folding and cracks were found. The dimensional test confirmed that they all met the requirements of the forging drawing, and were in good agreement with the simulation results. The maximum forming force error of each punch obtained from the test and the maximum forming force error of each punch obtained from the simulation were not more than 3.24%, and the production unit beat was 24 s. The multi-directional split forming process of hub bearing flange proposed in this work is formable, which effectively improves the material utilization and production efficiency of hub bearing flange forgings, and has certain guiding significance for the non-flash forming process of such parts and the construction of automatic production units.
关键词
轮毂轴承法兰盘 /
多向分流成形 /
数值模拟 /
工艺试验 /
自动化生产单元
Key words
hub bearing flange /
multi-directional split flow forming /
numerical simulation /
process test /
automatic production unit
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基金
河南省科技攻关项目(242102220017)