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针对广汽自主品牌“传祺”轿车的底盘铝合金后副车架压铸零件,从压铸合金的力学性能、压铸工艺设计及优化、模具设计及制造、铸件质量控制等方面进行了开发和研究。结果表明,采用耐热密封结构的高真空压铸模具具有良好的密封性能,可靠性高。多区域的温度测量及冷却水流量的实时调节提高了模具温度控制的精度。通过对工艺参数的优化,有效消除了铸件缺陷如裂纹、冷隔、缩孔、缩松等。开发的铝合金后副车架的铸件本体抗拉强度≥240MPa,屈服强度≥145MPa,伸长率≥6%,满足了“传祺”轿车的的使用要求。
According to the auto parts brand of Guangzhou Automobile, “Chuanqi” sedan chassis after the aluminum alloy die-casting parts, from the mechanical properties of die-casting alloys, die-casting process design and optimization, mold design and manufacturing, casting quality control and other aspects of the development and research . The results show that the use of heat-resistant sealing structure of high vacuum die-casting mold has good sealing performance, high reliability. Multi-zone temperature measurement and cooling water flow real-time adjustment to improve the accuracy of the mold temperature control. Through the optimization of process parameters, effectively eliminate the casting defects such as cracks, cold, shrinkage, shrinkage and so on. After the development of the aluminum alloy frame after the cast body tensile strength ≥ 240MPa, yield strength ≥ 145MPa, elongation ≥ 6%, to meet the “Chuan Qi” car’s use requirements.