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本文以电液换向阀为例,电刷镀修复工艺简述如下。首先要拆检与除油。液压阀属于精密零件,拆检时不得损坏或丢失,要仔细分析其工作原理,确定其拆装顺序,并做好各零件装配标记,零件要装入专用盒子,妥善保管。除油可先用清洗剂清洗,再用化学方法反复除油。修复的方法包括研磨阀孔与修理阀芯两项内容。测量阀孔和阀芯的配合间隙,阀孔直径为50_(+0.10)~(+0.05)mm,阀芯直径为50_(-0.05)~(-0.02)mm。阀芯与阀孔的配合间隙严重超差,达到了0.07～0.15 mm,且阀芯圆柱度公差在10～20μm。
In this paper, electro-hydraulic valve, for example, brush plating repair process is summarized as follows. The first to demolition and degreasing. Hydraulic valves are precision parts, dismantling may not be damaged or lost, it is necessary to carefully analyze the working principle, to determine the disassembly order, and make all the parts assembly mark, parts to be loaded into a special box, safekeeping. Degreasing can be cleaned with a cleaning agent, and then chemically repeated degreasing. Repair methods include grinding the valve hole and repair valve two elements. Measure the fitting clearance between the valve hole and the valve core. The diameter of the valve hole is 50 (+ 0.10) ~ (+0.05) mm and the diameter of the valve core is 50 (-0.05) -0.02) mm. The clearance between the valve plug and the valve hole is seriously out of tolerance, reaching 0.07-0.15 mm, and the tolerance of the valve plug cylinder is 10-20 μm.