Chromium-plated tooling

Abstract

The invention belongs to the field of surface treatment and particularly relates to a chromium-plated tooling. In the prior art, because a very poor depth capability in a chromium-plating process, uniformity degree of the thickness of a plating layer is difficult to ensure, so that only is a thick chromium can be plated, wherein the thickness is large than a required thickness by more than 50 [mu]m, and then the thick chromium is grinded until a use size in a mechanizing workshop. Another reason why a uniform thickness cannot be ensured is that an auxiliary anode during chromium-plating is required. Because a solution in a chromium trough is very low in transparency, the added auxiliary anode is very difficult to be ensured to be at a central position. Meanwhile, there is a potential risk that the anode contacts with the surface of a part, which causes electricity discharge and even causes part scrapping. The conventional production method is long in period, is high in cost and has quality potential risk. The chromium-plated tooling in the invention is convenient to use and is stable and reliable, and is suitable for producing aviation products as a tooling for plating chromium on inner bores. The tooling allows several parts to be electro-plated at the same time, is free of a grinding process after chromium-plating and can ensure inner diameter size and roundness of the part after chromium-plating to satisfy requirements.

Description

technical field [0001] The invention belongs to the field of surface treatment, and in particular relates to a chrome-plated frock. Background technique [0002] For the inner surface of the flange parts, the chrome plating is carried out. The chrome plating size of the inner surface of the parts is 35-40 microns, and the other surfaces are plated accordingly. At the beginning of production, due to the very poor depth capability of the chrome plating process, it is difficult to ensure the uniformity of the coating size. Only thick chromium can be plated, which is more than 50 microns thicker than the required thickness, and then it is ground to the size used by the machining workshop. Another reason why the uniform thickness cannot be guaranteed is that an auxiliary anode needs to be added during chrome plating. When the auxiliary anode is used, it is difficult to ensure that the auxiliary anode is in the center position. At the same time, there is a hidden danger. The anode...

AI Technical Summary

Problems solved by technology

[0002] For the inner surface of the flange parts, the chrome plating is carried out. The chrome plating size of the inner surface of the parts is 35-40 microns, and the other surfaces are plated accordingly. At the beginning of production, due to the very poor depth capability of the chrome plating process, it is difficult to ensure the uniformity of the coating size. Only thick chromium can be plated, which is more than 50 microns thicker than the required thickness, and then it is ground to the size used by the machining workshop. Another reason why the uniform thickness cannot be guaranteed is that an auxiliary anode needs to be added during chrome plating. When the auxiliary anode is used, it is difficult to ensure that the auxiliary anode is in the center position. At the same time, there is a hidden danger. The anode contacts the surface of the part, causing electric shock, and the part is scrapped in severe cases.

This traditional production method has a long cycle, high cost and hidden quality problems.

Images