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剪切是下料的主要方法之一。这种方法生产效率高,切口无材料损耗,因此在轴承行业应用广泛。当前国内普遍采用普通曲柄压力机下料,模具大部分是刀板套筒模。用这种模具下料精度差,切断面斜角一般为11°～13°,压塌一般在2mm以上,重量误差为3～5％,而且还有轴向毛刺,直接影响锻件质量。目前,国内棒料精密剪切的直径范围绝大多数都在50mm以下,剪切温度多为室温。而
Shearing is one of the main methods of unloading. This method of high production efficiency, incision no material loss, so widely used in the bearing industry. At present, the common domestic common crank press blanking, die most of the blade sleeve mold. With this die feeding accuracy is poor, the cutting surface bevel angle is generally 11 ° ~ 13 °, the collapse is generally more than 2mm, the weight error of 3 to 5%, but also the axial burr, a direct impact on the quality of forgings. At present, the vast majority of the diameter of the domestic precision cutting bar are 50mm below the shear temperature of mostly room temperature. and