Electroplating process for annular neodymium iron boron sheet products

Abstract

The invention discloses an electroplating process for annular neodymium iron boron sheet products. Each annular neodymium iron boron sheet product is bundled by a circle of binding band; the binding band is made from a non-electrical-conductivity material capable of resisting acid, base, high temperature and pressure; the width of the binding band is 1-3mm; a 2-20mm gap is formed between the binding band and each annular neodymium iron boron sheet product; the binding band winds by one circle along the inner surface, the upper end surface, the outer side surface and the lower end surface of each annular neodymium iron boron sheet product; end surfaces of the two adjacent annular neodymium iron boron sheet products can not be clung to each other due to blocking action of the binding bands of the annular neodymium iron boron sheet products in a drum; electroplating liquid enters from gaps formed by the binding bands between the end surfaces of the two adjacent annular neodymium iron boron sheet products and can be used for separating the two annular neodymium iron boron sheet products; a uniform electroplating layer is formed on the surface of each annular neodymium iron boron sheet products. The process has the advantages that the aim being 200 sheet/drum in the drum electroplating can be realized, so that the working efficiency is greatly improved; as the sheet sticking phenomenon is overcome, the percent of pass of products is obviously increased and can be up to more than 98%.

Description

technical field [0001] The invention relates to an electroplating process, in particular to an electroplating process for a neodymium-iron-boron flake annular product. Background technique [0002] NdFeB products are widely used in the fields of electronics and motors due to their superior magnetic properties. NdFeB ring products are currently commonly used NdFeB products. With the development of science and technology, the size of NdFeB ring products is gradually becoming smaller and thinner. At present, NdFeB ring products with an outer diameter (diameter) of 30-140mm, an inner diameter (diameter) of 5-100mm, and a thickness of 0.3-2mm are called NdFeB flake ring products. [0003] In order to improve the anti-corrosion performance of NdFeB flake annular products, electroplating treatment is usually required. There are two main electroplating processes for the existing NdFeB flake ring products: the first is the drum electroplating process, which is to put the NdFeB flak...

AI Technical Summary

Problems solved by technology

[0004] The drum-type electroplating process can reach 200 pieces of electroplating products at one time, and the production efficiency is high. However, due to the thin thickness and high finish of the NdFeB flake ring products, the NdFeB flake ring products in the drum are easy to interact with each other due to the tension of the plating solution. Adsorption, resulting in a patch phenomenon, so the adsorption surface of the two NdFeB flake ring products adsorbed together cannot form a coating and cause scrapping, and the qualified rate of electroplating is only about 40%.

Although the hanging electroplating process does not produce patching, the loading capacity of the hanger is small, and the number of one-time electroplating products is only 30 to 50 pieces, and the production efficiency is low. Under the buoyancy of the liquid and the shaking of the hanger, some NdFeB flake annular products will be detached from the hook during the electroplating process and the power will be cut off, resulting in poor bonding between the electroplating layer and the NdFeB flake annular product matrix. Pass rate is not high