Machining technology for low-carbon alloy steel drum brakes

Abstract

The invention discloses a machining technology for low-carbon alloy steel drum brakes and relates to the technical field of automobile spare parts. The machining technology sequentially comprises the steps of blanking, pre-bending, plate rolling, welding, bending, flat upsetting, reshaping, turning and drilling. According to the machining technology, in the aspect of the cost of machining equipment, by adopting an oil press, the cost is far lower than that of existing centrifugal casting or suspended pressing machines; the utilization rate of material is increased by more than 30% and is far higher than that of traditional manufacturing methods; machined products are protected against cracks on actual working conditions, and the safety is guaranteed; the manufacturing cost is greatly lowered, is lower than the preparation cost of cast iron drum brakes by more than 30% and is lower than the manufacturing cost of thermometal drum brakes by more than 50%.

Description

technical field [0001] The invention relates to the technical field of auto parts, in particular to a processing technology of a low-carbon alloy steel brake drum. Background technique [0002] Brake drums, also known as drum brakes, are a common type of car brakes and are used to slow down or stop a moving car. [0003] Existing materials for making brake drums generally include these two categories of cast iron or bimetal. [0004] Among them, cast iron is mainly used for large and medium-sized vehicles. It has good casting performance, good wear resistance, heat resistance and thermal conductivity, but its thermal fatigue resistance is poor. Especially when going down a long or steep slope, due to the large braking force and continuous braking, the temperature of the inner wall of the brake drum rises sharply. The greater the wall thickness of the moving drum, the greater the temperature difference between the inside and outside. The temperature difference stress and th...

AI Technical Summary

Problems solved by technology

[0006] In addition, the existing processing technology of brake drums adopts bimetallic brake drums, which generally include two major processes of forming and centrifugal casting. The production cost is relatively high, and the cost of production equipment is also high. machine; and although the outer shell is made of steel and will not crack, the inner wall is still poured with cast iron, and the inner wall will still crack when it encounters water in actual working conditions

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