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一、问题的提出薄壁零件在单件、小批量生产的情况下,加工内圆表面往往在普通车床上用三爪卡盘夹紧进行加工。这种夹紧方式属三点向心120°分布。零件壁厚很薄,夹紧时易于变形。加工后放松卡爪,零件回弹成了棱圆形而报废。这种情况是较为常见的。因此,必须正确掌握卡爪夹紧力与零件变形的关系。搞清了这个问题,就可以通过计算适当地增加一点外径,以提高零件抗变形的能力,使变形减小到允许的程度。作到了这一点,就可以在卡盘上车一个顶
First, the issue put forward Thin-walled parts in a single, small batch production, the processing of the inner surface of the circle is often used in ordinary lathe chuck with three jaws for processing. This clamping is a three-point 120 ° centripetal distribution. Parts thin wall thickness, easy to deform when clamping. After processing to relax the claws, the parts rebounded into a rounded shape and scrapped. This situation is more common. Therefore, we must correctly grasp the claw clamping force and the relationship between the deformation. To figure out this problem, we can calculate the appropriate increase of a little outside diameter, in order to improve the ability of parts to resist deformation, reduce the deformation to the extent permitted. To do this, you can get a top on the chuck