In the production of precision slender shafts, the surface needs to be chrome-plated, and the thickness of the chrome-plated layer has also become a concern of many people in the industry. Generally speaking, how thick is the thickness to meet the requirements? How to repair it after the production is completed? Let’s discuss these issues below.
The precision slender shaft needs to be coated repeatedly during chrome plating. Generally speaking, the thickness of each coating is about 0.03-0.06. Generally, the coating on the surface of the substrate will have a better effect. Compared with the second The effect of single coating is better.
Because the chrome-plated layer of the precision slender shaft is more prone to delamination and peeling, but there are some places where it is especially necessary to avoid such situations when using it.
However, the current domestic process for the thickness of the chrome layer of the precision slender shaft to reach more than 0.10 is not very mature. Although it can reach more than 0.10, it will only be done under special requirements. The use environment of some precision motor shafts requires It is exposed to the outside, so it is easy to collide. At this time, the coating is too thick, but it is not good.
The thickness of the coating of the precision slender shaft can be determined according to the actual application and conditions of the product. If only general protection requirements are required, and the mechanical load is relatively light, then the thickness of the coating can be 10-20μm.
If the pressure is constantly too high and the sliding load is not too large, the thickness of the coating is required to be 20-25μm; if the mechanical stress is relatively large and strong corrosion resistance is required, then the thickness of the coating needs to reach 150-300μm. Row.
When the processing is completed, it needs to be overhauled. The main purpose of the overhaul is to do a water pressure test. The water pressure is required to be 5 times the working pressure. Under normal circumstances, the slender shaft will not leak and deform. If the cylindrical surface of the precision slender shaft is slightly If there is some wear, you don’t need to repair it. If the piston rod and piston are seriously worn, repairs are needed. If cracks are found, they can only be scrapped.