Forming method of press-fit double-metal compound brake drum

Abstract

The invention discloses a forming method of a press-fit double-metal compound brake drum, and relates to the technical field of brake drum forming methods. Firstly, a cold drawing stretching method is adopted to manufacture a low-carbon steel pipe as a brake drum cover; a centrifugal casting method is used for manufacturing a cast iron pipe; the cast iron pipe is machined as a certain size; the outer diameter of the cast iron pipe is larger than the inner diameter of a low-carbon steel shell; multiple grooves are machined in the outer wall of the cast iron pipe; epoxy resin adhesive is coated on the outer wall of the cast iron pipe and in the grooves; the cast iron pipe is pressed in the brake drum cover manufactured by the low-carbon steel by a hydropress to form the double-metal compound brake drum compounded by two materials of low-carbon steel and cast iron; and the brake drum can be placed by 24 hours for installation for use. The forming method of the double-metal compound brake drum is simple, is high in efficiency, is firm in combination of two materials of the brake drum, and is safe and durable in product.

Description

technical field [0001] The invention relates to the technical field of forming methods of brake drums, in particular to a forming method of bimetallic composite brake drums. Background technique [0002] The vigorous development of the transportation industry has injected vitality into the automobile industry, and the development of the automobile industry has provided a huge development space for the development of auto parts, especially foundry enterprises. Brake drum, as the main wear and tear part in the automobile braking system, has a huge market demand due to its advantages of compact structure, reliable performance and high braking power. [0003] There are two main types of brake drum materials used in the market today, one is cast iron (used for large and medium-sized vehicles), and the other is aluminum-based composite materials (mainly used for small vehicles). The reason why cast iron is used as the material of most vehicle brake drums is mainly because of its ...

AI Technical Summary

Problems solved by technology

However, it also has certain disadvantages, mainly due to its poor thermal fatigue resistance, which is easy to be fatigued and then broken and scrapped; the weight is too large, which is out of date in terms of reducing the weight of vehicles and saving fuel as much as possible, and must be improved.

[0004] At present, several new technologies of bimetallic brake drums have appeared in China: 1. A steel belt is placed at the braking position during casting to improve its toughness. This method is difficult to control the quality consistency, and the improvement of its toughness is also limited. can fundamentally change its security

2. The outer layer is made of a low-carbon steel plate, and then cast directly into the finished shell by centrifugal casting. This method solves the problems of toughness and wear resistance, and has been used on a large scale abroad. Its disadvantages are difficult quality control, low production efficiency and high cost

3. The outer layer is made of low-carbon steel plate to make a shell, the inner layer is made of cast iron blocks and connected with riveting or bolts to make the inside and outside together. This technology also solves the problems of safety and wear resistance very well, but The production process is complicated, the production efficiency is lower, the investment is large, the cost is higher and the weight of the parts increases

Due to the shortcomings of the above technologies, these technologies have not been promoted and used in the domestic market

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