Protection device for nickel/chromium composite plating

Abstract

The invention discloses a protection device for nickel / chromium composite plating, belonging to the field of hydraulic cylinder plating. The protection device comprises an outer protection sleeve and an inner protection sleeve, wherein the inner protection sleeve is arranged at one end of the outer protection sleeve and is provided with a shoulder; the outer diameter of the inner protection sleeve is matched with the inner diameter of the outer protection sleeve; the inner diameter of the inner protection sleeve is matched with a cylinder piston rod; the outer protection sleeve is provided with an outer sleeve liquid discharge hole; the inner protection sleeve is provided with an inner sleeve liquid discharge hole and a liquid discharge groove; the outer protection sleeve and the inner protection sleeve are combined through bolts; the inner wall of the inner protection sleeve is provided with a thread; and the whole protection device is fixed on a non-plating position of the cylinder piston rod through the thread of the inner protection sleeve and a thread of a workpiece. According to the invention, the protection device is high in corrosion resistance, favorable in reusability, quick to replace, convenient to operate and good in protection effect, saves the cost, avoids the cross contamination of plating bath solutions and improves the production efficiency.

Description

technical field [0001] The invention relates to a nickel-chromium composite electroplating protective device, which belongs to the field of hydraulic cylinder electroplating. It is especially suitable for nickel-chromium composite electroplating protection for excavator hydraulic cylinder piston rods. Background technique [0002] In the process of excavator cylinder piston rod processing, when there are often parts that need to be electroplated and parts that cannot be electroplated on the same workpiece, the parts that cannot be electroplated must be protected and isolated, such as nickel-chromium composite electroplating for excavator hydraulic cylinder piston rods. [0003] At present, on the one hand, traditional electroplating protective devices are often made of metal materials such as steel or wrapped with tape for protection at parts that do not require electroplating, or made of PP and other materials. The disadvantages of these protective devices are: poor reusabi...

AI Technical Summary

Problems solved by technology

[0006] The nickel-chromium composite electroplating protective device of the present invention adopts PVC material to make the protective device instead of metal materials such as iron and steel to make or use protective devices such as adhesive tape winding, and firstly solves the problems of poor reusability, difficult cleaning, and easy pollution to the electroplating bath liquid; secondly, it relies on The inner sleeve thread fixes the protective device on the workpiece instead of relying on bolts to fix it on the workpiece. It is easy and fast to install and disassemble, which reduces the labor intensity of the operator and improves production efficiency. Third, for different types of workpieces, no need Redesign and replace the protective jacket, only need to replace the protective inner jacket, and the protective jacket can be shared with different types of workpieces, which reduces the cost; finally, when the workpiece needs to be plated and must be protected, there are often no grooves or small grooves , the bolt fixing structure is not easy to be stuck firmly, and it is easy to be skewed or fall off during use, and this protective device can solve this problem

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