A vacuum annealing method for an airbag outlet valve

A technology of airbag and air outlet valve, applied in the direction of furnace, furnace type, heat treatment equipment, etc., can solve the problems of difficult to meet terminal manufacturers, uneven product performance, etc., and achieve the effect of high hardness and good stability

Active Publication Date: 2020-11-24
苏州腾凯金属材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The release valve (that is, the air outlet valve, made of DC04) is an important part of the airbag system. It needs to ensure sufficient hardness during use to withstand the pressure when the airbag is released; the existing vacuum annealing method usually results in the same batch The performance of different products is uneven, and it is difficult to meet the requirements of terminal manufacturers

Method used

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  • A vacuum annealing method for an airbag outlet valve

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Effect test

Embodiment 1

[0018] The present embodiment provides a vacuum annealing method for an airbag outlet valve, which comprises the following steps:

[0019] (a) Check that the tooling (that is, the tray) has no deformation or cracking; parts and sundries left in the tooling; the tooling is clean and free of oil and dust; place the material rack neatly in the vacuum furnace charging area; put the tooling on the material rack , loading materials so that the outlet valves are placed in the tooling in a neat manner (the rack has 7 layers in total, and 6 layers can be loaded; each layer can hold 4 toolings, and each tooling can hold 150 outlet valves, so that the furnace is full 3600 outlet valves), vacuuming to ≤3Pa;

[0020] (b) It takes 30 minutes to raise the temperature from room temperature to 480°C, and keep it warm for 30 minutes;

[0021] (c) Vacuumize to ≤0.1Pa, heat up to 710°C in 40 minutes, and keep warm for 180 minutes;

[0022] (d) Cool down to 480°C (circulating water cooling) with...

Embodiment 2

[0024] The present embodiment provides a kind of vacuum annealing method of safety air bag outlet valve, and it is basically consistent with embodiment 1, and difference is, in step (b)-step (d), heat preservation temperature and heat preservation time are different, specifically:

[0025] (b) It takes 10 minutes to raise the temperature from room temperature to 490°C, and keep it warm for 50 minutes;

[0026] (c) Vacuumize to ≤0.1Pa, heat up to 720°C in 20 minutes, and keep warm for 170 minutes;

[0027] (d) Cool down to 470°C (circulating water cooling) with the furnace for 40 minutes, and keep warm for 10 minutes; then fill the vacuum furnace with nitrogen at a pressure of 0.3±0.1MPa to cool down to room temperature in 15 minutes.

Embodiment 3

[0029] The present embodiment provides a kind of vacuum annealing method of safety air bag outlet valve, and it is basically consistent with embodiment 1, and difference is, in step (b)-step (d), heat preservation temperature and heat preservation time are different, specifically:

[0030] (b) It takes 50 minutes to raise the temperature from room temperature to 470°C, and keep it warm for 10 minutes;

[0031] (c) Vacuumize to ≤0.1Pa, heat up to 700°C in 60 minutes, and keep warm for 190 minutes;

[0032] (d) Cool down to 490°C (circulating water cooling) with the furnace for 100 minutes, and keep warm for 8 minutes; then fill the vacuum furnace with nitrogen at a pressure of 0.3±0.1MPa to cool down to room temperature in 35 minutes.

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Abstract

The invention relates to a vacuum annealing method of safety air bag air outlet valves. The vacuum annealing method includes the following steps that (a) the air outlet valves are placed in a tray which is then placed in a vacuum furnace, and the pressure is reduced to be less than or equal to 3 Pa through vacuumizing; (b) the temperature is increased from the room temperature to 470-490 DEG C in10-50 min, and the temperature is kept for 10-50 min; (c) the pressure is reduced to be less than or equal to 0.1 Pa through vacuumizing, the temperature is increased to 700-720 DEG C in 20-60 min, and the temperature is kept for 170-190 min; and (d) the temperature is reduced to 470-490 DEG C through furnace cooling in 40-100 min, the temperature is kept for 5-10 min, then the vacuum furnace is filled with nitrogen with the pressure of 0.2-0.4 Mpa, and the temperature is reduced to the room temperature in 15-35 min. The air outlet valves of the same batch can be evenly annealed, the stabilityis good, the hardness is high, the appearance has a white and bright metal color, and no yellowing and blackening phenomenon occurs.

Description

technical field [0001] The invention belongs to the field of heat treatment of metal materials, and relates to an annealing method, in particular to a vacuum annealing method for an air bag outlet valve. Background technique [0002] Electronic airbag system is a passive safety (see car safety performance) protection system, which is used in conjunction with seat belts to provide effective crash protection for occupants. In a car collision, car airbags can reduce the head injury rate by 25% and the face injury rate by about 80%. [0003] The airbag system mainly includes airbag sensors, anti-collision airbags and electronic control devices. The release valve (that is, the air outlet valve, made of DC04) is an important part of the airbag system. It needs to ensure sufficient hardness during use to withstand the pressure when the airbag is released; the existing vacuum annealing method usually results in the same batch The performance of different products is uneven, and it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/26C21D1/773C21D9/00
Inventor 刘贻虎
Owner 苏州腾凯金属材料有限公司
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