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矿山刮板属长轴类零件,纵向截面变化较大,直接采用模锻难以合理分配金属体积。该文采用辊锻制坯分配坯料体积再模锻成形的工艺,确定了影响载荷和成形缺陷的4个因素,即辊轮角速度、摩擦因子、坯料温度和变径处圆角值。设计四因素三水平正交实验,以载荷为目标函数,通过数值模拟确定辊锻过程中辊轮角速度、摩擦因子、坯料温度、变径处圆角值的最优值,使辊锻后的坯料在长度方向上能有效进行体积分配且避免成形缺陷。通过实验验证,优化后的参数成形效果较好,对实际生产具有指导意义。
Mine scraper is a long axis of parts, the vertical section of the larger changes, the direct use of forging difficult to rationalize the distribution of metal volume. In this paper, we use roll forging billet to distribute the volume of blank and then forging forming process, and determine the four factors that affect the load and forming defects, namely the angular velocity of the roller, the friction factor, the billet temperature and the radius of the fillet. The four-factor and three-level orthogonal experiment is designed. The load is taken as the objective function to determine the optimal values of roll angular velocity, friction factor, billet temperature and radius at the roll forging process by numerical simulation. Volume distribution can be efficiently performed in the length direction and forming defects are avoided. The experimental results show that the optimized parameters are well formed and have guiding significance to actual production.