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一、在日常生产中应用的例子 我厂有一批新加工的50t起重机的滑轮,内孔超差,超差范围在0.05～0.10mm之间。考虑到超差范围不大,决定采用电刷镀技术修复这批滑轮。因为滑轮内孔承受的是径向力,滑轮材料是铸铁,故选用以镍为主的刷镀材料,具体刷镀工艺如下。 1.用锉刀、砂纸、油石打毛刺。 2.用四氯化碳和丙酮擦洗除油。 3.电净处理(工件接阴极)电压12～15V,1min油即除净,水冲。 4.2~#活化液处理(工件接阳极)电压12～15V,出现黑色碳膜为止,水冲。 5.3~#活化液处理,起啃骨头作用(工件接阳极),电压18～25V,除去2~#活化液形成的黑色碳膜,水冲。 6.因超差不大,可采用快速镍(工件接阴极),电压10～15V。刷镀到所需的厚度水冲。 7.用锉刀进行试验。 8.刷镀达到要求,擦干防锈。
First, the application of daily production examples I plant a new batch of 50t crane pulley, bore over tolerance, tolerance range between 0.05 ~ 0.10mm. Taking into account the small range of tolerance, decided to use brush plating technology to repair these wheels. Because the inner bore of the pulley is subjected to radial force, the pulley material is cast iron, so the choice of nickel-based brush plating material, the specific brush plating process is as follows. 1 with the file, sandpaper, oil stone burr. 2. With carbon tetrachloride and acetone scrub degreasing. 3 electric net treatment (the workpiece then the cathode) voltage 12 ~ 15V, 1min oil that is, except the net, red water. 4.2 ~ # Activation fluid treatment (workpiece connected to the anode) voltage 12 ~ 15V, there black carbon film so far, water rushed. 5.3 ~ # activation solution, play the role of gnawing bones (the workpiece connected to the anode), voltage 18 ~ 25V, remove the 2 ~ # activated carbon black film formed, water red. 6 due to little difference, you can use fast nickel (workpiece connected to the cathode), voltage 10 ~ 15V. Brush to the required thickness of water washed. 7. File test. 8. Brush to meet the requirements, dry rust.