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在分析汽车蓄能器储压管成形工艺的基础上,采用刚粘塑性热力耦合有限元技术,以成形载荷为评定标准,用Deform-3D软件对影响成形的坯料温度、模具预热温度、凸模速度3个工艺参数进行正交试验模拟分析。通过试验最终得到最佳成形工艺为:温挤压坯料温度850℃,模具预热温度300℃,凸模下压速度16 mm·s-1;冷挤压凸模速度8 mm·s-1。模拟结果表明,在该制件成形过程中,温挤压坯料温度和凸模速度对成形载荷影响最大,模具预热温度影响相对较小,但为了减少温差对成形的影响,模具预热温度应选取相对较高的温度;在后续冷挤压中应选取较小的凸模速度。按照该工艺参数进行实际零件的挤压生产,最终得到了符合要求的成形零件。
Based on the analysis of the forming process of accumulator pressure accumulator in automotive accumulator, the rigid-viscoplastic coupling finite element method was used to evaluate the forming load. Deform-3D software was used to analyze the influence of forming temperature, mold preheating temperature, Mode speed 3 parameters of the orthogonal experiment simulation analysis. The optimum forming process is as follows: the temperature of blank extrusion is 850 ℃, the preheating temperature of mold is 300 ℃, the pressing speed of punch is 16 mm · s-1; the speed of cold extrusion punch is 8 mm · s-1. The simulation results show that during the forming process of the part, the temperature and the punch speed of the hot extrusion have the greatest influence on the forming load and the impact of the mold preheating temperature is relatively small. However, in order to reduce the influence of the temperature difference on the forming, the mold preheating temperature Select a relatively high temperature; in the subsequent cold extrusion should choose a smaller punch speed. In accordance with the process parameters of the actual parts of the extrusion production, and ultimately get the requirements of the forming parts.