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图1所示外齿圈V形槽直径较大(φ1170.9±0.10mm),公差要求较严,原采用先测量内孔φ1122mm直径,再用角度样板控制V形槽尺寸的方法,以及在游标卡尺的二个测量爪上安装钢球的直接测量这两种方法,效果都不十分理想。为此,我们设计了齿圈V形槽测量仪(图2)。测量仪采用两直径为φ31.75mm的钢球1、13与工件的V形槽直接接触,钢球的同轴度控制在0.2mm左右。测量杆2采用冷拔无缝钢管,内装定位块3来作为压簧4的定位结构。右端螺纹与(?)螺母12联接,另外在测量杆2上铣出一条150mm左右的长槽,使对表基准杆5能沿着长槽左右移动。对表基准杆5与移动测杆11采用过盈配合。移动测杆11的外圆又与测量杆2的钢管内孔配研,其间隙控制在0.0008mm。可移式
Figure 1 shows the outer ring V-shaped groove larger diameter (φ1170.9 ± 0.10mm), tolerance requirements more stringent, the original use of the first measurement of the hole φ1122mm diameter, and then use the angle model control V-groove size method, Vernier caliper installed on the two measurement of the ball on the direct measurement of these two methods, the effect is not very satisfactory. For this purpose, we designed a ring gear V-groove measuring instrument (Figure 2). Measuring instrument uses two diameter φ31.75mm steel ball 1,13 in direct contact with the workpiece V-groove, steel ball concentricity control in about 0.2mm. Measuring rod 2 using cold drawn seamless steel pipe, built-in positioning block 3 as a pressure spring 4 positioning structure. The right end thread is connected with the (?) Nut 12, and a long groove about 150mm is milled on the measuring rod 2 so that the reference rod 5 can move left and right along the long groove. Table reference rod 5 and the moving rod 11 with interference fit. The outer diameter of the movable measuring rod 11 is matched with the inner diameter of the steel pipe of the measuring rod 2, and the gap is controlled at 0.0008mm. Portable