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我厂生产的拖拉机摇摆轴衬套,内径φ45_(+0.050)~(+0.095)mm,外径φ52_(0.045)~(+0.065)mm,宽度50mm,要求内外圆同心度为0.03mm。按照工艺要求,将工件的内孔磨好后再磨外圆,从φ52.5mm磨至φ52_(0.045)~(+0.065)mm。以前磨削时,用1:3000锥度芯棒作定位基准,工件套上和取下时,都要用木榔头敲打,工人劳动强度大,生产率较低,且质量不稳定。后来我厂试制了一个快速磨削夹具(见附图),用于上述小型衬套的批量加工,效果较好。结构分析和操作支架2固定在磨床头架的拨盘上,起支撑作用,它通过半圆键4带动主体9转动,主体9与支架2孔的配合间隙约0.3～0.5mm,使主体9有一定的自由度,
The tractor swing bushing produced by our factory has inner diameter of φ45 _ (+0.050) ~ (+0.095) mm and outer diameter of φ52_ (0.045) ~ (+0.065) mm and width of 50mm. According to the technical requirement, the inner hole of the workpiece is grinded and then the outer cylinder is grinded from φ52.5mm to φ52_ (0.045) ~ (+0.065) mm. Previous grinding, with 1: 3000 taper mandrel for the positioning of the benchmark, the workpiece sets and remove, we must use wooden hammer beat, labor intensity, lower productivity, and the quality is not stable. Later, I trial production of a rapid grinding fixture (see photo), for the small batch processing of small bushing, the effect is better. Structure analysis and operation bracket 2 is fixed on the grinder head frame dial, play a supporting role, which drives the main body 9 through the semicircular key 4 rotation, the body 9 and the bracket 2 holes with a gap of about 0.3 ~ 0.5mm, so that the main body 9 has a The freedom,