Machining technology of cam reinforcement lever mechanism

A force-increasing lever and lever mechanism technology, which is applied in the field of mechanical processing, can solve the problems that the surface finish of the arc surface cannot be guaranteed, the surface finish cannot reach the grinding process, and the processing accuracy of the heat treatment hardness layer is not accurate, etc., to solve large Insufficient batch production, improved arc surface finish, and the effect of guaranteeing the consistency of leverage ratio

Inactive Publication Date: 2013-08-28
WUHAN QUNFENG MACHINERY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The existing processing technology scheme, the wire cutting process is not suitable for mass production, and the surface finish of the product processing cannot reach the precision of the grinding process, which is not conducive to the functional requirements of the product's heavy-duty rotation
Due to the inaccurate processing accuracy of the heat treatment hardness layer on the surface of the product, uneven thickness occurs
The existing technology uses wire cutting to process the arc surface of the workpiece, which cannot guarantee a complete arc surface, and the surface finish of the arc surface cannot be guaranteed

Method used

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  • Machining technology of cam reinforcement lever mechanism
  • Machining technology of cam reinforcement lever mechanism
  • Machining technology of cam reinforcement lever mechanism

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Embodiment Construction

[0033] A processing technology of a cam booster lever mechanism, comprising the following steps:

[0034] Step 1 Rough machining

[0035] Locate the large arc and the lever arm, first rough machine the ball socket,

[0036] Positioning on the outer arc surface (see figure 2 ), first lock the rough-machined ball socket, then lock the lever arm, position the lever mechanism, fix the lever mechanism on the machine tool through the clamp body, rough the inner hole cylinder of the lever,

[0037] Ball and socket and circular cylindrical positioning (see image 3 ), accurately locate the lever mechanism, and then fix the lever mechanism through the pressing pin, position the inner arc surface and the lever arm, fix the lever mechanism on the machine tool through the clamp body, and rough the outer arc surface;

[0038] Step two heat treatment

[0039] The blank of the lever mechanism is forged from low-carbon steel. According to the function, it is necessary to increase the sur...

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Abstract

The invention relates to a machining technology of a cam reinforcement lever mechanism. The machining technology includes the steps of rough machining, heat treatment and finish machining. Due to the fact that an arc surface of a workpiece is machined through a grinding method, the finish degree of the arc surface of the workpiece is improved, rotation resistance in heavy load of the workpiece is reduced, and product performance and product consistency are improved. Due to the fact that machining devices for linear cutting and the like are replaced by a grinding machine, work efficiency is improved, and volume production is improved beneficially.

Description

technical field [0001] The invention relates to the field of mechanical processing, in particular to a processing technology of a cam booster lever mechanism. Background technique [0002] Pneumatic disc brakes were introduced into China from Europe at the beginning of this century, and have developed rapidly in China in the past ten years. Pneumatic disc brakes have two main functional modules, one is the wear gap automatic adjustment mechanism, and the other is the braking force booster lever mechanism ( figure 1 ). The design principle of the booster lever is a cam mechanism. As a cam mechanism, it is composed of two non-concentric arc surfaces. The arc surface needs to have high hardness, and the entire lever needs to have high strength. Therefore, the lever processing technology is very complicated, which needs to meet the needs of mass production and ensure the processing quality of the product. The existing product processing plan adopts forging blanks, and after r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
Inventor 杨贵才张雪梅
Owner WUHAN QUNFENG MACHINERY
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