High-corrosion resistance hub bearing unit and machining process

Abstract

The invention discloses a high-corrosion resistance hub bearing unit. The high-corrosion resistance hub bearing unit comprises a flange plate; the flange plate includes an annular flange, and a cylindrical part arranged on the front side of the annular flange and provided with an outer ring and an inner ring; a riveting section for fixedly and rotationally riveting the inner ring is arranged at the head end of the cylindrical part; zinc nickel plating layers are arranged on the outer surfaces of the flange plate and the outer ring; and the flange plate is provided with a zinc nickel plating layer blank area corresponding to the riveting section. The invention further provides a machining process of the high-corrosion resistance hub bearing unit, wherein the design parameters of a rotary riveting cavity of the riveting pressure head are as follows: alpha=gamma=40 degrees, beta=5 degrees, R1=1.5 mm, R2=5 mm, and R3=3 mm. All outer surface, besides the rotary riveting part of the flange plate, of the hub bearing unit is plated with the black environment-friendly zinc nickel plating layers, so that the oxidation resistance and the corrosion resistance of metal surfaces are improved, and the service life of the bearing is prolonged.

Description

technical field [0001] The invention relates to auto parts, in particular to an auto hub bearing. Background technique [0002] The hub bearing unit has now been developed to the third generation. The third-generation hub bearing unit has excellent performance and is easy to install and maintain. However, as a metal surface, the anti-corrosion and anti-oxidation properties are insufficient. In rainy and snowy weather, especially in some alpine regions of North America and Russia, the road surface is covered with snow for a long time. In order to eliminate snow accumulation, a large amount of snow remover is used on the road surface. The metal surface has a serious corrosion effect. The hub bearing unit works in such a harsh working environment, and the surface is easily corroded, which affects its performance and life. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a high-corrosion-resistant wheel hub bearing ...

AI Technical Summary

Problems solved by technology

However, as a metal surface, the anti-corrosion and anti-oxidation properties are insufficient. In rainy and snowy weather, especially in some alpine regions of North America and Russia, the road surface is covered with snow for a long time. In order to eliminate snow accumulation, a large amount of snow remover is used on the road surface. The metal surface is severely corroded. The hub bearing unit works in such a harsh working environment, and the surface is easily corroded, which affects its performance and life.

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