Double-metal hot jacket integrated automobile brake drum and machining method thereof

Abstract

The invention provides a double-metal hot jacket integrated automobile brake drum, which consists of a drum-shaped shell and a tube-shaped casting liner, wherein the tube-shaped casting liner is arranged on the inner wall of the drum-shaped shell; the wall of the drum-shaped shell is made of constant-strength spinning steel. According to the double-metal hot jacket integrated automobile brake drum, a shell of the brake drum is made by a spinning technique of a spinning machine, the material of the brake drum shell is compact and has high strength, and the tube-shaped casting is taken as the liner so as to have the uniform thickness and simpleness and convenience in machining; a step of heating the shell of the brake drum specifically comprises the steps of bushing the tube-shaped casting liner into the shell under the condition of expansion of the diameter of the shell, condensing, fixedly fastening, and reinforcing the fixation between the shell of the brake drum and the casting liner by utilizing a pin; therefore the brake drum is ensured to have the advantages that the integrated strength is high, the material is utilized reasonably, the weight is light, the heat radiation performance is good, and the manufacturing technique process is suitable for automatic line operation.

Description

technical field [0001] The invention belongs to the technical field of brake drums, and in particular relates to a bimetal shrink-fit integrated automobile brake drum and a processing method thereof. Background technique [0002] The brake drum is a part used for braking in the automobile "drum brake device". It consists of three parts, namely brake drum, brake pad and power device (such as camshaft or oil cylinder, cylinder); when the power device in the brake device pushes the brake pad outward, the brake pad and the inner wall of the rotating brake drum squeeze Pressure and friction, the resulting friction torque achieves the braking effect of the car. [0003] The brake drum of large trucks is particularly important. The surface of the inner cavity of the brake drum often works in a friction state during the driving process of the car, so the brake drum must have high wear resistance and high heat resistance; the kinetic energy of the car travels through When the wheel...

AI Technical Summary

Problems solved by technology

[0004] The brake drum structure of traditional large trucks mainly includes two structures: integral casting type and split assembly type. Since the integral casting type brake drum is made of brittle material cast iron, due to the consideration of strength to prevent breaking or cracking, the general product is designed to be a thicker wall structure. , so the body is large and heavy, and the safety is poor; while the split assembly brake drum is to fix multiple arc tile-shaped cast iron "lining plates" in the steel shell with bolts, but due to the processing of the shell and the lining In order to maintain the concentricity, it increases the difficulty of processing and assembly, and it is proved in practice that the liner will be loose and cracked.

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