论文部分内容阅读
在轴承盖上划线钻均布孔时,首先要找到轴承盖的圆心。当轴承盖的配合面已经加工,而非配合面为毛坯面时,用常规方法找圆心将很困难。下述方法可以帮你迅速、简便、准确地找出圆心:首先将轴承盖连同轴承座平置,然后在轴承盖外任意找一固定点O′,以O′为圆心、R为半径(尽量使R=OO′),在轴承盖圆心O附近画一系列短圆弧,一边画一边转动轴承盖。轴承盖转过一周后,就出现一个由各圆弧组成的包络线小圆周,该圆周的圆心就是轴承盖的圆心。当ROO′时,为内包络线圆周,如图(b)。如包络圆过大,不易精确地确定圆心,可以调整半径R,使R≈OO′,便可得到
In the bearing cover scribing drilling are all holes, we must first find the center of the bearing cap. When the mating surface of the bearing cap is machined and the non-mating surface is the blank surface, it is difficult to find the center of the circle by conventional methods. The following method can help you quickly, easily and accurately find the center of the circle: First, with the bearing cover bearing flat, and then find a fixed point outside the bearing cover O ’to O’ as the center, R is the radius Make R = OO ’) Draw a series of short arcs near the center O of the bearing cap, and rotate the bearing cap while painting. After a week of bearing cap rotation, a small circle of envelopes formed by the arcs appears, and the center of the circle is the center of the bearing cap. When R OO ’, it is the inner envelope circumference, as shown in Fig. (B). If the envelope circle is too large, it is difficult to determine the center of the circle precisely, and the radius R can be adjusted so that R≈OO ’