Stamping and Welding Bottom Plate of Freight Car Drum Brake and Its Forming Process

Abstract

The invention belongs to the technical field of automotive brake fittings, and specifically discloses a freight car drum brake impulse welding bottom plate and a forming process thereof. The freight car drum brake impulse welding bottom plate comprises a bottom plate body, a shaft sleeve and a stiffening plate sleeved on the two ends of the bottom plate body, wherein the middle of the bottom plate body is provided with a round hole, and the surface of the middle of the bottom plate body is provided with a dust cap fixed ring which is arranged coaxially with the round hole; the bottom plate body is integrally formed through a stamping flanging and a ribbing, and the shaft sleeve is a circular pipe which penetrates through the bottom plate body and is welded with the upper and lower surfaces of the bottom plate body; and the dust cap fixed ring and the stiffening plate are both welded on the bottom plate body, and the freight car drum brake impulse welding bottom plate is finished through the processes such as baiting, profiling, welding and machining. The intensity and the rigidity can reach the same standard as that of the casting bottom plates, or even higher than the standard of the casting bottom plates. By adopting the impulse welding and welding technique to produce the bottom plate of the brake, the process is easy, mechanized volume production is easy to realize, the manufacturing cost is low, meanwhile, the subsequent mass detection is convenient, the rejection rate obtains effective control, and the yield of products is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of automobile brake accessories, and in particular relates to a stamping and welding bottom plate of a drum brake of a truck and a forming process thereof. Background technique [0002] Brakes are an important safety component of a car. At present, domestic truck brakes generally adopt a drum brake structure, and the brake base plate is the installation base of each part in the drum brake assembly except the brake drum, and the brake base plate bears the braking reaction torque when the brake is working. Therefore, the brake base plate is required to have sufficient rigidity and strength, and failure is not allowed, and higher requirements are placed on product structure and materials. [0003] In order to ensure sufficient rigidity of the brake base plate, the domestic brake base plate is generally produced by a mature casting process at this stage. However, the casting process is complicated, the casting ...

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Problems solved by technology

[0003] In order to ensure sufficient rigidity of the brake base plate, the domestic brake base plate is generally produced by a mature casting process at this stage. However, the casting process is complicated, the casting products have many defects, the unit cost is high, and the scrap rate is difficult to effectively reduce due to the characteristics of casting itself. control, and environmental pollution

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