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在自动定心三爪卡盘上车削偏心,一般采用垫片法,偏心距允许在10毫米以下。而偏心距太大时,垫片厚夹持不牢,或者无法夹持。但是,只要掌握本文提供的三爪卡盘上的数学,就可以把三爪卡盘当成算盘一样,灵活地算出一系列公差为2.66毫米的偏夹值来;从而使偏心距从10毫米增加到50毫米或更大。下面作简单介绍。为了说明问题,以规格为φ200毫米的卡盘为例。第一种方法:如图1,将三个顺爪的第三号爪推迟一扣套上平面螺纹,于是得到一个螺距的偏夹值,“偏夹值”是一个不同于偏心距的概念。如图1中,H是指退装的3
In the automatic centering three-jaw chuck turning eccentric, the general method of shims, eccentricity allowed below 10 mm. The eccentricity is too large, the gasket thickness is not strong, or can not hold. However, having mastered the math at the three-prong chuck provided in this article, the three-prong chuck can be used as an abacus to flexibly calculate a series of partial offsets with a tolerance of 2.66 mm; thereby increasing the eccentricity from 10 mm to 50 mm or more. Here for a brief introduction. To illustrate the problem, take a chuck of φ200 mm as an example. The first method: As shown in Fig. 1, the three paws with the third pawl are delayed by a flat thread on a buckle, so that a pitch offset value is obtained. The “offset value” is a concept different from the eccentricity. As shown in Figure 1, H refers to the refitted 3