我厂试制的新产品 WSY-1400砂轮平衡仪用于磨床砂轮平衡。动平衡仪’有一只挡油圈组合件,是该产品零件加工难度较大的工件之一,其结构和尺寸如图1。图中内圈的材质为45钢,外圈为L2软铝;组合后内外圈的单向间隙要求为0.3毫米,组合件的(?)50孔与(?)62外径的不 I trial trial of the new product WSY-1400 wheel balancer for grinding wheel balance. Dynamic balancer ’has a oil ring assembly, the product is more difficult parts machining one of its structure and size shown in Figure 1. In the figure, the inner ring is made of 45 steel and the outer ring is L2 soft aluminum; the unidirectional clearance between the inner and outer rings after combination is 0.3 mm;