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本检查活塞环曲率的新方法,可以在如БИМ——1型工具显微镜的基础上实现。首先将活塞环放置在带分度盘的公称直径量规内,在环端面上(母线轮廓的周边上)按照给定的角距5°、10°或15°划出标记点,然后把环从量规中取出,放到显微镜工作台上,此时环处于自由状态。为了确定某一标记点,例如C 点的曲计算C 点的曲率。率,需测出C 点两侧相邻标记点的坐标△Xi与纵坐标△yi,在这种情况下△X 值应处在(0.2～0.05)D_H 区间内(D_H——活塞环公称直径)。这个比值取决于显微镜的分辨能力、活塞环工作面和端面的加工的表面粗糙度以及计算所取的角距。根据测得的△Xi 和△yi 值,按照公式
This new method of checking the piston ring curvature can be achieved on the basis of a microscope tool such as the БИМ-1. First place the piston ring in a nominal diameter gauge with indexing disc and mark points at 5 °, 10 ° or 15 ° of the given angular distance on the end face of the ring (on the periphery of the busbar contour) Take out the gauge and put it on the microscope stage, then the ring is in a free state. In order to determine a certain point, for example, the curvature of the C point. Rate, the coordinate △ Xi and ordinate △ yi of adjacent points on both sides of point C should be measured. In this case △ X value should be in the range of (0.2-0.05) D_H (D_H - nominal diameter of piston ring ). This ratio depends on the resolving power of the microscope, the machined surface roughness of the face and face of the piston ring, and the calculated angular separation. According to the measured △ Xi and △ yi values, according to the formula