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Cold extrusion machining process of brake shoe roller shafts

A processing technology and roller shaft technology, applied in the field of machine parts processing, can solve problems such as a large number of cracks on the product surface, failure to obtain qualified products, unreasonable process design, etc., and achieve small batch-to-batch differences, small sample-to-sample deviations, and smooth surfaces Effect

Inactive Publication Date: 2020-03-10
谷城天兴机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the structure of the roller shaft is complex, generally using 45# oil steel through hot forging and machining, the forging process is complex, and the production efficiency is low, especially after forging, it is necessary to process all sides of the part. Large quantities lead to high production costs for this product
Some manufacturers experimented with extrusion technology for processing, but due to factors such as unreasonable process design and excessive deformation, there were a large number of cracks on the product surface, and qualified products could not be obtained.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Using oil steel as raw material, after sawing according to the specifications and sizes, annealing, flat head, shot blasting, phosphorus saponification treatment, cold extrusion shaping, machining, quenching, tempering, shot blasting, cleaning, and grinding machine processing are performed in sequence to obtain finished products. Moving hoof roller shaft.

[0028] The annealing is carried out in an industrial quenching resistance furnace, the annealing temperature is 750-800° C., and the annealing time is 6-7 hours. The annealing temperature is slightly lower than that of the prior art, mainly for cost reduction, and the treatment process has been tested to meet the usage requirements.

[0029] The flat head is carried out according to the conventional process, but it should be noted that the execution standard of the flat head is to strictly ensure the quality consistency among individuals.

[0030] The shot blasting refers to surface shot blasting treatment with cast...

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PUM

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Abstract

The invention discloses a cold extrusion machining process of brake shoe roller shafts, and belongs to the technical field of machine part machining. The cold extrusion machining process includes thefollowing steps that 45# steel is used as the raw material; and after blanking is conducted according to specified sizes, annealing, end flattening, shot blasting, phosphorus saponification processing, cold extrusion shaping, machining, quenching, tempering, shot blasting, washing, grinding machine machining and waste material recycling are sequentially conducted to obtain the finished product brake shoe roller shafts. The brake shoe roller shafts obtained through the process are high in precision, small in differences among individuals, good in strength performance and long in service life.

Description

technical field [0001] The invention relates to the technical field of machine parts processing, in particular to a cold extrusion process of a brake shoe roller shaft. Background technique [0002] The vehicle brake is an important part of the vehicle and the key to ensuring driving safety. Vehicle brakes commonly used today include drum brakes and disc brakes. At present, the drum brake widely used in domestic trailers, semi-trailers and trucks is composed of a brake base plate, a brake shoe, a friction lining, a brake shoe support pin, a camshaft, a return spring, an adjustment arm, a tension spring, a roller shaft, components such as rollers. The roller shaft is also called the brake shoe roller pin, which is used together with the roller. The roller is sleeved on the roller shaft. When the brake is stepped on, the cam surface of the camshaft pushes the roller to open the brake shoe. The friction lining is in contact with the inner cylindrical surface of the rotating ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/42B21D3/10C21D9/28C21D1/18B24C1/00B23P15/00
CPCB21D3/10B23P15/00B24C1/00C21D1/18C21D9/28C23C22/42
Inventor 梁宏军
Owner 谷城天兴机械有限公司
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