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1972年以来,对楔横轧进行了从二辊到三辊、从小型到大型、从设备到工艺的全面研究,为楔横轧的推广应用提供了一定的理论根据和技术资料。在二辊楔横轧研究过程中,试轧出小型拖拉机尾轴,并对其它产品进行了实验研究。轧制出的产品轴向阶梯尺寸及形状精确,表面无螺旋痕迹,可以实现少、无切削加工,并且生产效率高,设备简单。但是轧件轴心出现疏松及孔腔,严重影响着产品质量。理论分析表明,在二辊楔横轧中,轧件在两个轧辊作用下自由表面大,出现明显的横向扩展及椭圆化趋势,使轧件横断面承受交变应力的作用,导致轴心疏松和孔腔,因此,对轧件材质的纯净程度和轧制的力学条件有着严格地要求。此外,
Since 1972, the cross-wedge rolling from the two rolls to three rolls, from small to large, from the equipment to the process of a comprehensive study for the promotion of cross-wedge rolling application provides a theoretical basis and technical information. During the research of two-roller cross wedge rolling, the small tractor tail shaft was tested and the other products were experimentally studied. Rolled product axial ladder size and shape accurate, surface no spiral marks, you can achieve less, no cutting, and high production efficiency and equipment is simple. However, the rolling axis appears porosity and porosity, seriously affecting the product quality. The theoretical analysis shows that in the two-roll cross wedge rolling, the free surface of the rolling material under the action of two rolls is large, and there is a clear tendency of lateral expansion and ovalization, so that the cross-section of the rolling part is subjected to the alternating stress, resulting in loosening of the axial center And the cavity, therefore, the purity of rolling material and the rolling mechanics conditions have strict requirements. In addition,