CN102338182A - Production process for automobile suspension spring - Google Patents
Production process for automobile suspension spring Download PDFInfo
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- CN102338182A CN102338182A CN2010102374063A CN201010237406A CN102338182A CN 102338182 A CN102338182 A CN 102338182A CN 2010102374063 A CN2010102374063 A CN 2010102374063A CN 201010237406 A CN201010237406 A CN 201010237406A CN 102338182 A CN102338182 A CN 102338182A
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Abstract
The invention discloses a production process for an automobile suspension spring. The production process is characterized by comprising: a cold rolling step: performing cold rolling on a raw material according to a designed geometric dimension by using a spring coiling machine to form a rough finished product of a front suspension spring; a tempering step: performing tempering on the rough finished product produced in the step of cold rolling; a stress shot blasting step: performing pre-pressing and stress shot blasting on the rough finished product subjected to the tempering at normal temperature; a common shot blasting step: performing common shot blasting on the rough finished product subjected to the stress shot blasting at normal temperature; a compressing step: compressing the rough finished product subjected to the common shot blasting to a free length of a design specification to form a semi-finished product; and a coating step: coating the semi-finished product subjected to the compressing to form a spring finished product. The stress shot blasting step is added between the tempering step and the common shot blasting step, and the stress shot blasting is carried out by adopting pills of which the hardness is HV720 or even HV800 in a pre-pressing state, so the surface residual stress of the prepared automobile suspension spring is greatly improved, and then the fatigue life under the same wire specification is prolonged, and design requirements are fully met.
Description
Technical field
The present invention relates to a kind of auto parts and components, relate in particular to a kind of automotive suspension spring production technology.
Background technique
Automotive suspension spring is the important functional part in the passenger-car chassis shock mitigation system, and main effect is an absorbed oscillation, guarantees occupant's travelling comfort.From the technological layer analysis, it also plays keeps tire and ground applying, guarantees the function of vehicle maneuverability.At present, except the top luxurious car of minority uses the Active suspension, the shock mitigation system of most of car all is to be combined by spiral bearing spring and vibration damper, and along with developing of automobile industry, the annual whole world is increasing to the aggregate demand of bearing spring.Since the eighties in last century, energy consumption, environmental protection, safety have become the overriding concern factor of Automobile Design, have promoted the progress of auto manufacturing technology, influenced by this, and it is about 20% that the design stress of bearing spring has improved, and weight reduces about 25%.For example, the design stress of spring requires to reach 1180Mpa, also will satisfy fatigue test requirement more than 500,000 times.Existing automotive suspension spring manufacturing process is as shown in Figure 1; Comprise: cold coiling step 11 → tempering step 12 → common shot-peening step 13 → compression step 14 → application step 15 → load detects step 16; Because the hardness of the pill of common shot-peening is merely HV560, HV640, the product of therefore being produced can not reach above requirement.Thereby produce the contradiction that can not closely be connected between design and the manufacturing.
Summary of the invention
The present invention is in order to solve the problems referred to above that existing technology exists, and provide a kind of no matter from the stress of spring, still the fatigue strength of spring all can reach the automotive suspension spring production technology of designing requirement.
The technological scheme that the present invention takes is: the automotive suspension spring production technology, be characterized in, and comprising:
Cold coiling step: through the Digital Control Plane Roll-up Spring machine raw material is carried out cold coiling by the physical dimension of design, form the first finished product of front suspension spring;
Tempering step: the first finished product to cold coiling step output carries out tempering;
Stress shot blasting step: the first finished product after the tempering is carried out precompressed and stress shot blasting at normal temperatures;
Common shot-peening step: the first finished product behind the counter stress shot-peening carries out common shot-peening at normal temperatures;
Compression step: the first finished product behind the common shot-peening is compressed to the free length of design specification, forms semi-finished product;
The application step: the semi-finished product to after the compression carry out application, form the spring finished product.
Above-mentioned automotive suspension spring production technology wherein, also comprises the spring finished product after the application is carried out the step that load detects.
Above-mentioned automotive suspension spring production technology, wherein, the hardness of the pill that is adopted in the described stress shot blasting step is HV720, or HV800.
Above-mentioned automotive suspension spring production technology; Wherein, The diameter of the pill that is adopted in the described stress shot blasting step is
0.5～0.9mm, and ratio is controlled at 70～85%.
Above-mentioned automotive suspension spring production technology, wherein, shot-peening coverage scale >=95% that is adopted in the described stress shot blasting step.
Above-mentioned automotive suspension spring production technology, wherein, the shot peening strength 0.35A～0.55A that is adopted in the described stress shot blasting step.
The present invention is owing to adopted above technological scheme; Between tempering step and common shot-peening step, increased the stress shot blasting step; And to adopt down hardness through preloading condition be that the pill of HV720 even HV800 carries out stress shot blasting, the surface residual stress of the automotive suspension spring product that makes improved greatly, thereby improved the fatigue life under the equal wire gage; Can reach 1,000,000 times through test, satisfy designing requirement fully.
Description of drawings
Fig. 1 is the process flow diagram that existing technology is produced automotive suspension spring.
Fig. 2 is the process flow diagram that the present invention produces automotive suspension spring.
Embodiment
For making clearer understand performance of the present invention, characteristic, below through an embodiment and combine accompanying drawing that the present invention is done detailed explanation.
See also Fig. 2.Automotive suspension spring production technology of the present invention comprises: cold coiling step 21, tempering step 22, stress shot blasting step 23, common shot-peening step 24, compression step 25, application step 26 and also comprise the spring finished product after the application is carried out the step 27 that load detects.Wherein:
The cold coiling step is through the Digital Control Plane Roll-up Spring machine raw material to be carried out cold coiling by the physical dimension of design, forms the first finished product of front suspension spring;
Tempering step is that the first finished product to cold coiling step output carries out tempering in tempering furnace, and the temperature of this tempering generally is controlled at 360～400 degree;
The stress shot blasting step is that the first finished product after adopting the stress shot blasting machine to tempering carries out precompressed and stress shot blasting at normal temperatures; The hardness of the pill that is adopted in this step is HV720, or HV800.Its shot-peening time generally is controlled at 4/minute; Pellet diameters is
0.5～0.9mm; Best at
0.6～0.8mm, ratio is controlled at 70～85%; Shot-peening coverage scale>=95%; Shot peening strength preferably is controlled at 0.35A～0.55A (ampere) generally at 0.30A～0.60A (ampere).The pill flow can be adjusted according to Different products voluntarily, for example grasps at 50+5/～5A (ampere);
Common shot-peening step is that the first finished product behind the employing compressed air shotblasting machine counter stress shot-peening carries out common shot-peening at normal temperatures; Wherein the shot-peening time is grasped at 15S; Preferably be controlled at: shot-peening coverage scale >=95%; Shot peening strength 0.35A～0.55A; Pill flow 55 ± 5A.
Compression step is the free length that the first finished product after adopting vertical press to common shot-peening is compressed to design specification, forms semi-finished product;
The application step is that the semi-finished product after adopting the spray stream waterline to compression carry out application, forms the spring finished product.Described application step comprises: clean, table accent, phosphatization, secondary cleaning, oven dry, air-cooled, dust, process such as curing.Reach and dust evenly, the coating pore-free does not have the requirement that influences corrosion-resistant impurity.
The step that load detects mainly is finished product to be carried out the detection of load indicators used, makes the product that dispatches from the factory reach designing requirement.
Claims (6)
1. the automotive suspension spring production technology is characterized in that, comprising:
Cold coiling step: through spring coiling machine raw material is carried out cold coiling by the physical dimension of design, form the first finished product of front suspension spring;
Tempering step: the first finished product to cold coiling step output carries out tempering;
Stress shot blasting step: the first finished product after the tempering is carried out precompressed and stress shot blasting at normal temperatures;
Common shot-peening step: the first finished product behind the counter stress shot-peening carries out common shot-peening at normal temperatures;
Compression step: the first finished product behind the common shot-peening is compressed to the free length of design specification, forms semi-finished product;
The application step: the semi-finished product to after the compression carry out application, form the spring finished product.
2. automotive suspension spring production technology according to claim 1 is characterized in that, also comprises the spring finished product after the application is carried out the step that load detects.
3. automotive suspension spring production technology according to claim 1 is characterized in that, the hardness of the pill that is adopted in the described stress shot blasting step is HV720, or HV800.
4. automotive suspension spring production technology according to claim 1; It is characterized in that; The diameter of the pill that is adopted in the described stress shot blasting step is
0.5～0.9mm, and ratio is controlled at 70～85%.
5. automotive suspension spring production technology according to claim 1 is characterized in that, shot-peening coverage scale >=95% that is adopted in the described stress shot blasting step.
6. automotive suspension spring production technology according to claim 1 is characterized in that, the shot peening strength 0.30A～0.60A that is adopted in the described stress shot blasting step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102374063A CN102338182A (en) | 2010-07-27 | 2010-07-27 | Production process for automobile suspension spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102374063A CN102338182A (en) | 2010-07-27 | 2010-07-27 | Production process for automobile suspension spring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102338182A true CN102338182A (en) | 2012-02-01 |
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ID=45514075
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102374063A Pending CN102338182A (en) | 2010-07-27 | 2010-07-27 | Production process for automobile suspension spring |
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| CN (1) | CN102338182A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102896585A (en) * | 2012-10-18 | 2013-01-30 | 山东雷帕得弹簧有限公司 | Shot blasting process for producing high-strength and high-stress steel plate 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 |
Citations (6)
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|---|---|---|---|---|
| US6132533A (en) * | 1995-09-22 | 2000-10-17 | Ateliers Metallurgiques De Saint Urbain (Amsu) | Method for making arcuate coil springs, resulting springs and devices for carrying out the method |
| US6346157B1 (en) * | 1999-03-31 | 2002-02-12 | Showa Corp. | Manufacturing method of suspension spring for car |
| CN1354802A (en) * | 1999-06-08 | 2002-06-19 | 日本发条株式会社 | High-strength spring and production method therefor |
| CN1764730A (en) * | 2003-03-26 | 2006-04-26 | 中央发条株式会社 | Process for producing high-strength spring |
| CN101435476A (en) * | 2007-11-15 | 2009-05-20 | 上海中国弹簧制造有限公司 | Spring production process flow for increasing load detection times |
| CN101439458A (en) * | 2007-11-20 | 2009-05-27 | 上海中国弹簧制造有限公司 | Process for manufacturing heavily stressed valve spring |
-
2010
- 2010-07-27 CN CN2010102374063A patent/CN102338182A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6132533A (en) * | 1995-09-22 | 2000-10-17 | Ateliers Metallurgiques De Saint Urbain (Amsu) | Method for making arcuate coil springs, resulting springs and devices for carrying out the method |
| US6346157B1 (en) * | 1999-03-31 | 2002-02-12 | Showa Corp. | Manufacturing method of suspension spring for car |
| CN1354802A (en) * | 1999-06-08 | 2002-06-19 | 日本发条株式会社 | High-strength spring and production method therefor |
| CN1764730A (en) * | 2003-03-26 | 2006-04-26 | 中央发条株式会社 | Process for producing high-strength spring |
| CN101435476A (en) * | 2007-11-15 | 2009-05-20 | 上海中国弹簧制造有限公司 | Spring production process flow for increasing load detection times |
| CN101439458A (en) * | 2007-11-20 | 2009-05-27 | 上海中国弹簧制造有限公司 | Process for manufacturing heavily stressed valve spring |
Non-Patent Citations (2)
| Title |
|---|
| 王仁智: "论贯穿于冷卷圆簧制造工艺全过程的残余应力", 《中国表面工程》, vol. 19, no. 6, 31 December 2006 (2006-12-31), pages 4 - 15 * |
| 金初云: "国内汽车悬架螺旋弹簧的工艺研究", 《科技信息（学术研究）》, no. 28, 31 December 2007 (2007-12-31), pages 87 - 88 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102896585A (en) * | 2012-10-18 | 2013-01-30 | 山东雷帕得弹簧有限公司 | Shot blasting process for producing high-strength and high-stress steel plate 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 |
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Application publication date: 20120201 |