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图1所示为连杆结合面磨削夹具,在装配中对定位块1、2的制造和安装精度,提出了以下要求:所有B面应在同一平面内,对D面的等高度允差为0.02毫米;c面对D面的垂直度允差为0.012/100毫米;c面对A面的垂直度允差0.012/100毫米。因为定位块是由锻造毛坯机械加工而成,工序多而且精度要求高。在使用中的精度保证都比较困难。所以,我们将定位块定位改为定位销定位。改进后的定位销结构简
Figure 1 shows the link with the grinding surface grinding fixture in the assembly of the positioning block 1,2 manufacturing and installation accuracy, made the following requirements: All B surface should be in the same plane, the D surface contour height tolerance Is 0.02 mm; c, the perpendicularity tolerance to surface D is 0.012 / 100 mm; and the perpendicularity tolerance of c to surface A is 0.012 / 100 mm. Because the positioning block is machined by forging rough, process and more precision requirements. Accuracy in use are more difficult to guarantee. So, we will change the positioning block positioning pin positioning. Improved positioning pin structure is simple