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液压阀中的阶梯盲孔由于光洁度及形位公差要求较高,如图1所示阶梯盲孔D_1与D_2的圆度允差0.003mm,同轴度允差0.005mm,与阀芯配合间隙0.005mm～0.01mm,因而限制了加工手段,使孔的质量不易得到保证。我们利用了L_2大于L_1的有利条件设计了一套阶梯盲孔研磨器具,不仅使质量得到了保证,且提高了加工速度。阶梯盲孔研磨器具(见图2)由研磨杆1、
Stepped blind hole in the hydraulic valve due to the requirements of the smoothness and shape tolerance, as shown in Figure 1 blind hole D_1 and D_2 degree of tolerance tolerance 0.003mm, concentricity tolerance of 0.005mm, and the valve with the gap 0.005 mm ~ 0.01mm, thus limiting the processing means, so that the quality of the hole is not easy to be guaranteed. We use the L_2 is greater than the favorable conditions L_1 designed a ladder blind hole grinding equipment, not only to ensure the quality, and improve the processing speed. Step blind hole grinding apparatus (see Figure 2) by the grinding rod 1,