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Buffer spring production process

A buffer spring and production process technology, applied in the field of parts processing, can solve the problems of difficulty in achieving fatigue resistance, wave spring deformation, complex stress, etc., and achieve the effects of good heating, reducing heat energy waste, and good thermal conductivity.

Inactive Publication Date: 2019-10-25
重庆成俊工贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although when the hard steel wire is tempered, the tempering shrinkage of the diameter of the circular steel wire spring can be calculated according to the empirical formula, but because the wave spring is a steel wire with a rectangular cross section, and the stress generated by the waveform change is more complicated, and because different batches Due to the influence of many factors such as the chemical element content, strength and structural stress difference of the secondary raw materials, the wave spring will be more or less deformed after tempering, and it is difficult to achieve the required fatigue strength.

Method used

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  • Buffer spring production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A buffer spring production process, comprising the following steps:

[0032] A. Shot peening

[0033] Shot blasting is performed on the raw material (annular hard steel plate), specifically, cast steel shot is used for shot blasting.

[0034] B. The first suppression

[0035] The raw material is pressed for the first time by using a pressure forming machine with a pressure of 6-7MPa to obtain a preliminary formed buffer spring.

[0036] C, the first tempering

[0037] Put the formed buffer spring into the tempering furnace for tempering. The tempering furnace is located directly below the pressure forming machine. The upper end of the tempering furnace is provided with a closable opening. Specifically, the upper end of the tempering furnace is horizontally slid and connected with a baffle. The plate can turn the tempering furnace on or off. combine figure 1 As shown, the tempering furnace 1 is vertically slidably connected with a placement plate 2, and the placemen...

Embodiment 2

[0049] In this embodiment, three times of pressing and three times of tempering are carried out, and the rest of the steps are consistent with Embodiment 1.

[0050] The parameters of three times of pressing and three times of tempering are as follows:

[0051] Compression pressure (MPa) Tempering temperature (℃) Tempering time (min) the first time 6 350 50 the second time 7 400 80 the third time 8 450 100

Embodiment 3

[0053] In this embodiment, four times of pressing and four times of tempering are carried out, and the rest of the steps are consistent with Embodiment 1.

[0054] The parameters of four times of pressing and four times of tempering are as follows:

[0055] Compression pressure (MPa) Tempering temperature (℃) Tempering time (min) the first time 5 350 50 the second time 6 280 70 the third time 7 420 85 the fourth time 8 450 100

[0056] Carry out anti-fatigue test to the buffer spring that embodiment 1-3 produces, through test, the fatigue limit of the buffer spring that embodiment 1 processes can reach 1050MPa, the fatigue limit of the buffer spring that embodiment 2 processes can reach 1120MPa, implement The fatigue limit of the buffer spring processed by example 3 can reach 1130MPa. By test results, it is found that the fatigue limit of the buffer spring processed by embodiment 3 does not significantly increase compared wit...

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Abstract

The invention belongs to the technical field of component machining, and particularly discloses a buffer spring production process. A pressed and formed buffer spring is tempered for a plurality of times in a tempering furnace at 350 DEG C to 450 DEG C; and the buffer spring is pressed by using a pressure forming machine between two tempering processes. According to the process disclosed by the invention, the stress of the buffer spring can be eliminated, and the anti-fatigue strength of the buffer spring is improved.

Description

technical field [0001] The invention belongs to the technical field of parts processing, and in particular relates to a buffer spring production process. Background technique [0002] Wave spring is a common buffer spring. Wave spring is a thin ring-shaped elastic metal element composed of several crests and troughs. After heat treatment in a specific method and according to specific conditions, the hardness is generally controlled between HRC40-50, so that the spring has good elasticity. Because wave springs have peaks and troughs, there is a certain distance between multiple wave springs axially sleeved together, which can be applied to occasions where the load and deformation are not large, the spring stiffness is required to be small and axial preload needs to be applied. Widely used in motors, textile machinery, hydraulic equipment, automobiles and other industries. [0003] Wave springs are generally made of hard steel wires that are pressed into desired waveforms. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21F35/00C21D9/02
CPCB21F35/00C21D9/02
Inventor 胡军高福臣颜欢
Owner 重庆成俊工贸有限公司
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