Slender pipe part single-piece independent power supply and flowing chromium plating device

Abstract

The invention discloses a slender pipe part single-piece independent power supply and flowing chromium plating device. The slender pipe part single-piece independent power supply and flowing chromiumplating device comprises an upper support, a lower support, a slender pipe and an anode steel wire and further comprises an upper support lifting mechanism, an anode steel wire tensioning mechanism, an independent power supply system, a pipeline circulation system, an electroplating bath, and a control system, wherein the upper support lifting mechanism is fixedly installed on one side of the upper support and used for driving the upper support to move and clamping or loosening the slender pipe; the anode steel wire tensioning mechanism is arranged below the lower support and is used for clamping an anode steel wire; the independent power supply system is arranged beside the lower support, the positive electrode of a power supply is connected with the anode steel wire tensioning mechanism,and the negative electrode of the power supply is connected with the lower support to provide independent power supply to the single-piece slender pipe; the pipeline circulation system and the electroplating bath are arranged beside the upper support and the lower support, and the pipeline circulation system is used for connecting the upper support, the lower support and the electroplating bath to form an electroplating liquid flowing circulating loop; and the control system controls the upper support lifting mechanism to move up and down and controls the independent power system, the pipeline circulation system and the anode steel wire tensioning mechanism to be started or stopped. The device has a self-centering function, and automatic production is convenient to implement.

Description

technical field [0001] The invention belongs to the technical field of mechanical devices for electroplating, and in particular relates to a flowing chrome-plating device equipped with an independent power supply for a single slender tube part. Background technique [0002] The deep hole of a slender tube works in a high-temperature, high-pressure and high-speed environment. It needs to have extremely high wear resistance and anti-ablation performance. Ordinary metal materials are difficult to meet the requirements of this working condition. So far, metal chromium is the material with the best wear resistance and ablation resistance that has been found. In order to meet the requirements of the working condition of the slender pipe, it is usually necessary to electroplate a layer of metal chromium on the surface of the metal material. [0003] Current status: On the one hand, when the surface of the deep hole of a slender tube is chrome-plated, generally one hanger is equipp...

AI Technical Summary

Problems solved by technology

This method makes the circulation speed of the electroplating solution in the deep small hole slow, and it is difficult to replenish the consumed and diluted electrolyte in time, and a large amount of gas gradually generated in the deep small hole from bottom to top in the electroplating solution seriously causes the solution resistance during the electroplating process. Gradiently increases from bottom to top, and also affects the distribution of polarization resistance

This phenomenon directly leads to the bottom-up reduction of the current density on the inner wall of the deep small hole, resulting in a bottom-up reduction in the metal chromium deposition rate, which leads to the uneven distribution of the thickness of the chromium plating layer on the elongated tube from bottom to top. The thickness of the chromium layer at the lower end is thicker, and the upper end is thinner, and some problems such as poor gas discharge effect in the deep hole due to the deflection of the hanger cause the phenomenon that the chromium layer is thin in the middle part and thick at both ends.

[0005] This series of reasons caused the thickness uniformity of the chrome plating layer on the inner wall of the deep small hole of the slender tube to be greatly affected, which greatly reduced the qualified rate of chrome plating and seriously affected the performance of the product.

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