基于金属流线分析的三柱槽壳温挤件工艺优化

发布时间：2018-11-13 18:20

【摘要】：挤压件体积成形过程中,金属流线对其使用性能影响很大。针对三柱槽壳温挤件金属流线不佳现象,分析了流线的形成过程,研究了正挤工艺、反挤凸模形状和尺寸、摩擦力和挤压速度对金属流线的影响规律。据此提出改善流线结构的方案,并进行实验验证。结果表明:相对于平底和梯形反挤冲头,三角冲头结构对金属流线的引导作用更佳,且在保证沟道尺寸的前提下,三角冲头底面倾斜角、引流圆锥凸台顶角圆弧半径和底面直径越大越好;正挤凹模锥角取60°~90°最为合理;摩擦力对金属流线影响较大,摩擦力越大,金属流线越差;挤压速度对金属流线的影响不大。
[Abstract]:Metal streamline has a great influence on the performance of extruded parts in the process of bulk forming. The forming process of streamline is analyzed, and the influence of positive extrusion process, shape and size of reverse extrusion die, friction force and extrusion speed on metal streamline is studied. According to this, the scheme of improving streamline structure is put forward, and the experiment is carried out. The results show that the triangulation punch structure can guide the metal streamline better than the flat bottom and trapezoidal backextruder, and the angle of the bottom of the triangulation punch is better than that of the trapezoidal backextruder, and the angle of inclination of the bottom surface of the triangulation punch can be obtained on the premise of ensuring the channel size. The larger the arc radius and the diameter of the bottom surface, the better; The conical angle of positive extrusion die is 60 掳~ 90 掳, the friction force has great influence on the metal streamline, the bigger the friction force is, the worse the metal streamline is, and the extrusion speed has little effect on the metal streamline.
【作者单位】：江苏大学机械工程学院;江苏威鹰机械有限公司;
【基金】：江苏省科技成果转化专项资金(SBA2014030056) “青蓝工程”学术带头人(苏教师(2014)23号) 江苏省重点研发计划(BE2015134) 镇江市重点研发计划(GY2015008)
【分类号】：TG376.1

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