CN112080623A - Light high-stress suspension spring strengthening production process - Google Patents
Light high-stress suspension spring strengthening production process Download PDFInfo
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- CN112080623A CN112080623A CN202010807819.4A CN202010807819A CN112080623A CN 112080623 A CN112080623 A CN 112080623A CN 202010807819 A CN202010807819 A CN 202010807819A CN 112080623 A CN112080623 A CN 112080623A
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- steel wire
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/02—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for springs
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
- C21D7/06—Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
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- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Heat Treatment Of Articles (AREA)
- Springs (AREA)
Abstract
The invention belongs to the technical field of springs, and particularly relates to a light-weight high-stress suspension spring strengthening production process. The process comprises the following steps: (1) selecting a steel wire material through design calculation and finite element CAE analysis of the spring; (2) after the steel wire material is wound, firstly heating the steel wire material, then quickly cooling the steel wire material, and finally heating the steel wire material; (3) and (4) carrying out shot blasting on the treated spring, and naturally cooling to obtain the spring. The spring prepared by the invention has light weight, low cost and material saving, the fatigue life is prolonged from 40 ten thousand times to 60 ten thousand times, the residual compressive stress on the surface of the spring can be greatly improved, the maximum residual compressive stress can reach-1000 MPa, the depth of the residual compressive stress layer is increased and can reach 600 mu m, so that the shear stress of the spring for resisting work is improved, the fatigue life is further prolonged, the aim of light weight and high stress is fulfilled, the smoothness of a vehicle is improved, the fuel consumption rate is reduced, and the spring is energy-saving and environment-friendly.
Description
Technical Field
The invention belongs to the technical field of springs, and particularly relates to a light-weight high-stress suspension spring strengthening production process.
Background
China has become a big country for automobile consumption and manufacture, but the core technology and the research and development level of automobile suspension systems and parts have a great gap compared with developed countries, and China automobiles are facing to comprehensive technology upgrading and innovation.
In order to ensure the reliability of the spring, the existing large automobile host factories generally adopt a thick wire diameter and low stress, and the spring is heavy in weight, large in material consumption and high in cost, so that the automobile is high in oil consumption, and is not beneficial to environmental protection and material saving.
Therefore, the invention carries out special research on the lightweight high-stress spring, has light weight, low cost, material saving and performance comparable to the product level of developed countries such as Europe and America, and is at the leading level in China.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the defects in the prior art are overcome, and the light high-stress suspension spring strengthening production process is provided, so that the suspension spring has the characteristics of light weight, low cost, high stress and long service life.
The invention relates to a light high-stress suspension spring strengthening production process, which comprises the following steps of:
(1) selecting a steel wire material through design calculation and finite element CAE analysis of the spring;
(2) after the steel wire material is wound, firstly heating the steel wire material, then quickly cooling the steel wire material, and finally heating the steel wire material;
(3) and (4) carrying out shot blasting on the treated spring, and naturally cooling to obtain the spring.
Preferably, the steel wire material in the step (1) has the diameter of 10-16mm and the tensile strength of 1735-2050 MPa.
Preferably, in the step (2), after the steel wire material is wound, the steel wire material is horizontally placed on a conveyor chain of a tempering furnace, and is subjected to heating treatment in a first heating area, then is conveyed to a cooling area for rapid cooling, and finally is conveyed to a second heating area for heating treatment.
Preferably, after the steel wire material is wound in the step (2), the steel wire material is firstly heated to 380-420 ℃, then is rapidly cooled for 7-13min, and is finally heated to 340-360 ℃.
Preferably, the spring 35s after the treatment in the step (3) is put into a shot blasting machine to be shot-blasted.
Preferably, the shot blasting in the step (3) is performed by performing the thermal spraying twice in succession.
After the steel wire is wound into the spring, the spring has internal stress, so that the size of the spring is unstable and cracks are easy to generate. After being heated by the first heating area, the spring has the advantages of internal stress elimination, stable size and no crack generation. After reheating in the second heating zone, shot blasting is carried out, the residual compressive stress is increased, and the depth of the residual compressive stress layer is increased, so that the shear stress of the spring resisting work is improved, the fatigue life is prolonged, and the aim of light weight and high stress is fulfilled.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention can reduce the weight of the spring by 20 percent, save materials, reduce the cost by 10 to 15 percent, prolong the fatigue life from 40 ten thousand times to 60 ten thousand times and increase the stress to 1000MPa to 1300 MPa.
2. The invention can greatly improve the residual compressive stress on the surface of the spring, the maximum residual compressive stress can reach-1000 MPa, and the depth of the residual compressive stress layer is increased and can reach 600 mu m, thereby improving the shear stress of the spring resisting work, further improving the fatigue life and realizing the aim of light weight and high stress.
3. The invention improves the allowable stress of the spring and reduces the weight of the spring, thereby increasing the smoothness of a vehicle, reducing the consumption rate of fuel oil, saving energy and protecting environment.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings and examples.
Example 1
The light high-stress suspension spring strengthening production process comprises the following steps:
(1) firstly, designing and calculating a spring, then introducing a three-dimensional model and material properties of a casting into CAE software for analysis, and selecting an oil quenching tempered steel wire material with the diameter of 11.0mm and the tensile strength of 1900MPa according to an analysis result;
(2) winding a steel wire material to obtain a spring with the total number of turns of 8.0, horizontally placing the spring on a tempering furnace conveying chain, firstly heating to 390 ℃ in a first heating area, then conveying to a cooling area for rapid cooling for 10min, and finally conveying to a second heating area for heating to 350 ℃;
(3) and (3) enabling the processed spring 35s to enter a shot blasting machine for shot blasting, firstly carrying out rough blasting in a primary hot shot blasting machine, then carrying out fine blasting in a secondary hot shot blasting machine, and naturally cooling after the shot blasting is finished.
The specification of the spring steel wire in the prior art is phi 10-phi 16, the stress is 800MPa-980MPa, and the performance of the spring prepared in the embodiment is compared with that of the original spring, and the result is shown in Table 1.
TABLE 1 comparison of Properties results
| Specification of steel wire | Strength of material | Maximum stress | Weight (D) | Weight reduction ratio | |
| Original spring scheme parameters | φ11.6 | 1735MPa | 880MPa | 2.35kg | - |
| Lightweight spring solution parameters | φ11.0 | 1900MPa | 1015MPa | 1.75kg | 25.5％ |
As can be seen from table 1, the suspension spring prepared according to the present invention has a greatly reduced weight while having higher strength and stress.
Of course, the foregoing is only a preferred embodiment of the invention and should not be taken as limiting the scope of the embodiments of the invention. The present invention is not limited to the above examples, and equivalent changes and modifications made by those skilled in the art within the spirit and scope of the present invention should be construed as being included in the scope of the present invention.
Claims (6)
1. A light high-stress suspension spring strengthening production process is characterized by comprising the following steps: the method comprises the following steps:
(1) selecting a steel wire material through design calculation and finite element CAE analysis of the spring;
(2) after the steel wire material is wound, firstly heating the steel wire material, then quickly cooling the steel wire material, and finally heating the steel wire material;
(3) and (4) carrying out shot blasting on the treated spring, and naturally cooling to obtain the spring.
2. The strengthening production process of the lightweight high-stress suspension spring according to claim 1, characterized in that: the steel wire material in the step (1) is an oil quenching tempering steel wire material with the diameter of 10-16mm and the tensile strength of 1735 and 2050 MPa.
3. The strengthening production process of the lightweight high-stress suspension spring according to claim 1, characterized in that: and (3) horizontally placing the steel wire material on a tempering furnace conveying chain after the steel wire material is wound in the step (2), carrying out heating treatment on the steel wire material in a first heating area, then conveying the steel wire material to a cooling area for rapid cooling, and finally conveying the steel wire material to a second heating area for heating treatment.
4. The strengthening production process of the lightweight high-stress suspension spring according to claim 1 or 3, characterized in that: in the step (2), after the steel wire material is wound, the steel wire material is firstly heated to 380-420 ℃, then is rapidly cooled for 7-13min, and is finally heated to 340-360 ℃.
5. The strengthening production process of the lightweight high-stress suspension spring according to claim 1, characterized in that: in the step (3), the processed spring 35s is put into a shot blasting machine to be subjected to shot blasting.
6. The strengthening production process of the lightweight high-stress suspension spring according to claim 1 or 5, characterized in that: the shot blasting treatment in the step (3) is to perform hot blasting twice in succession.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010807819.4A CN112080623A (en) | 2020-08-12 | 2020-08-12 | Light high-stress suspension spring strengthening production process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010807819.4A CN112080623A (en) | 2020-08-12 | 2020-08-12 | Light high-stress suspension spring strengthening production process |
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| Publication Number | Publication Date |
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| CN112080623A true CN112080623A (en) | 2020-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010807819.4A Pending CN112080623A (en) | 2020-08-12 | 2020-08-12 | Light high-stress suspension spring strengthening production process |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060060269A1 (en) * | 2003-03-26 | 2006-03-23 | Chuo Hatsujo Kabushiki Kaisha | Process for producing high-strength spring |
| CN103290194A (en) * | 2013-03-19 | 2013-09-11 | 钱江弹簧（北京）有限公司 | A manufacture process for a high stress suspension spring |
| CN104690495A (en) * | 2013-12-05 | 2015-06-10 | 上海中国弹簧制造有限公司 | Manufacturing process of high-stress suspension spring |
| CN106011629A (en) * | 2016-07-06 | 2016-10-12 | 安徽红桥金属制造有限公司 | Automobile suspension spring steel with high strength and high toughness and preparation method of automobile suspension spring steel |
-
2020
- 2020-08-12 CN CN202010807819.4A patent/CN112080623A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060060269A1 (en) * | 2003-03-26 | 2006-03-23 | Chuo Hatsujo Kabushiki Kaisha | Process for producing high-strength spring |
| CN103290194A (en) * | 2013-03-19 | 2013-09-11 | 钱江弹簧（北京）有限公司 | A manufacture process for a high stress suspension spring |
| CN104690495A (en) * | 2013-12-05 | 2015-06-10 | 上海中国弹簧制造有限公司 | Manufacturing process of high-stress suspension spring |
| CN106011629A (en) * | 2016-07-06 | 2016-10-12 | 安徽红桥金属制造有限公司 | Automobile suspension spring steel with high strength and high toughness and preparation method of automobile suspension spring steel |
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Application publication date: 20201215 |
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