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Chrome plating method for spherical crown surface of major diameter spherical crown workpiece

A workpiece ball and large-diameter technology, applied in the direction of the electrode, etc., can solve the problems of complex process, the surface finish of the spherical crown cannot meet the requirements, and the uniformity of the coating layer is difficult to control, so as to achieve high surface finish, reduce follow-up workload, and deposit deposition fast effect

Active Publication Date: 2009-02-25
LUOYANG SUNRUI SPECIAL EQUIP
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Problems solved by technology

[0003] The purpose of the present invention is to solve the defects and deficiencies of the existing electroplating processing method that the process is complicated, the coating thickness and the uniformity of the coating size are difficult to control, and the smoothness of the spherical crown surface after chrome plating can not meet the requirements. Chromium Plating Method for Spherical Crown Surface of High Large Diameter Spherical Crown Workpiece

Method used

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  • Chrome plating method for spherical crown surface of major diameter spherical crown workpiece
  • Chrome plating method for spherical crown surface of major diameter spherical crown workpiece
  • Chrome plating method for spherical crown surface of major diameter spherical crown workpiece

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Embodiment Construction

[0026] The present invention will be described in further detail below in conjunction with accompanying drawing description and specific embodiment:

[0027] see figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , the chromium-plating method of a spherical crown surface of a large-diameter spherical crown workpiece of the present invention, comprising the process steps of degreasing and pickling, positioning in the groove, preheating, chrome plating, water washing, unloading and dehydrogenation,

[0028] A. In the described positioning step of entering the groove, a conductive plate 2 is set on the aspherical end face of the workpiece 1, the spherical crown surface of the workpiece 1 is vertically placed in the plating solution, and the anode strip 3 or the anode plate 4 are also vertically placed in the plating solution Among them, its anode strip 3 or anode plate 4 are arranged as follows:

[0029] A1. The anode strips 3 are arranged in two layers. The inner anode...

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Abstract

The invention provides a method for plating chromium on a spherical cap surface of a large-diameter spherical cap workpiece. In a step of immersing and positioning, the arrangement mode or structure of an anode strap or an anode plate is changed; in a step of plating chromium, opacified chromium is plated under the conditions that the temperature of the plating solution is 70 to 75 DEG C and the current density is 20 to 25A / decimeter<2>; and then, hard chromium is plated under the conditions that the temperature of the plating solution is 50 to 55 DEG C and the current density is 25 to 30A / decimeter<2>. The polishing processing is carried out on the spherical cap surface of the workpiece, which has the advantages of good evenness of chromium plated coating, defect prevention, high electroplating efficiency, fast speed of cladding deposit, high surface finish of the spherical cap surface after chromium is plated, and subsequent mechanical processing workload reduction.

Description

technical field [0001] The invention relates to an electroplating processing method, in particular to a chrome-plating method for a spherical crown surface of a large-diameter spherical crown workpiece. Background technique [0002] The connection between the bridge and the pier is usually made of spherical bearings. The spherical crown lining is an important component of the spherical bearing, and the spherical surface of the spherical crown lining is usually required to be chrome-plated. With the development of bridge construction, the size and specifications of spherical bearings are constantly increasing, and the diameter of spherical crown liners is also constantly increasing. In China, the maximum diameter of the spherical crown liner can reach 2.2 meters at present, and the technical requirements for its processing are also constantly improving. For the large-diameter spherical crown liner, due to the strict requirements on the thickness of the coating, the uniformit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D7/00C25D5/00C25D17/12
Inventor 张春晖吴军
Owner LUOYANG SUNRUI SPECIAL EQUIP
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