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三、国外加工针阀体喷孔的方法国外油泵油嘴厂加工嘴孔大都采用钻、铰加工方法,喷孔表面粗糙度可达到Ra1.25μm,孔径公差为0.006mm,保证了多孔式针阀偶件的性能。以瑞士DUAP公司介绍的专用设备加工长型针阀体喷孔为例,它的加工如图7所示。其特点是在钻、铰喷孔的同时,又能去除工件压力室与喷孔交叉边缘的毛刺。将工件套在分度头的心轴上,并对准定位销,由转轴转动摇臂,再用挡板在轴向方向上压紧工
Third, the method of processing needle orifice abroad Foreign pump nozzle factory processing nozzle holes are mostly used drilling, hinge processing method, the nozzle surface roughness Ra1.25μm, aperture tolerance of 0.006mm, to ensure the porous needle valve The performance of the piece. To DUAP company introduced the Swiss special equipment for processing long-needle body orifice, for example, its processing shown in Figure 7. It is characterized by drilling, reaming hole at the same time, but also to remove the workpiece pressure chamber and the nozzle hole at the edge of the burr. The workpiece sets the spindle in the indexing head, and alignment of the pin, turn the rocker by the shaft, and then use the bezel in the axial direction of the compaction