CN101829882B - Manufacture method of variable cross-section reed with high strength of more than 1800 MPa - Google Patents
Manufacture method of variable cross-section reed with high strength of more than 1800 MPa Download PDFInfo
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- CN101829882B CN101829882B CN2010100046098A CN201010004609A CN101829882B CN 101829882 B CN101829882 B CN 101829882B CN 2010100046098 A CN2010100046098 A CN 2010100046098A CN 201010004609 A CN201010004609 A CN 201010004609A CN 101829882 B CN101829882 B CN 101829882B
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Abstract
The method relates to a manufacture method of a variable cross-section reed with high strength of more than 1800 MPa, which sequentially comprises the steps of: 1, blanking the reed; 2, processing a center hole; 3, commonly shot-blasting; 4, forming a variable cross-section; 5, trimming a coiled lug; 6, quenching and annealing; 7, controlling the temperature and shot-blasting by stress; 8, processing by preserving the temperature; 9, freely shot-blasting; 10, assembling an assembly; 11, prepressing and strengthening, and the like. The invention optimizes and improves manufacture process of the variable cross-section reed with high-strength, is not only suitable for manufacturing variable cross-section reeds with high-strength of more than 1800MPa by using 60Si2CrVA(improved), but also suitable for manufacturing the variable cross-section reeds with high-strength by applying various kinds of spring steels of 51CrMoV4, 60SiCrV7 and the like, improves the surface quality of the reed, increases the residual press stress after the shot-blasting by the reed stress, increases the capability of improving the stress relaxation resistance of the reed and the fatigue service life, and meets the requirements for reducing the weight, prolonging the service life, improving the comfort and the like of vehicles.
Description
Technical field:
The present invention relates to a kind of manufacture method of variable cross-section reed with high strength, particularly relate to the above manufacture method of variable cross-section reed with high strength of a kind of 1800MPa level.
Background technology:
The weight of the BF system that light bus, big-and-middle-sized truck adopted accounts for the 8-9% of automotive dead weight, thereby realizes that the lightweight of BF has important effect to alleviating complete vehicle weight.Few Leaf Spring owing to have advantages such as the sheet number of reed is few, in light weight, ride comfort is good, has crucial meaning to realizing car load lightweight and raising car load ride comfort and riding comfort in design.At present; Developed country has adopted the taper-leaf spring of being made up of a slice or two or three longitudinal variable cross-section spring to replace traditional vertical uiform section multi-disc leaf spring commonplacely abroad; Domestic increasing vehicle also begins to adopt taper-leaf spring to replace the multi-disc leaf spring, and the design stress level has also been brought up to more than the 1000MPa by 800MPa.In order to make few sheet spring can bear higher stress; Requirement of strength to reed is also brought up to more than the 1800MPa; And the problem that intensity exists fatigue behaviour that blemish sensitiveness is significantly increased after improving; Thus need to traditional reed manufacturing process particularly technology such as surface peening, heat treatment study and optimize and improve, with the unification of the highly enriched and high fatigue property of realizing reed.
Summary of the invention:
The technical problem that the present invention will solve is the above manufacture method of variable cross-section reed with high strength of a kind of 1800MPa level.
The present invention relates to the above manufacture method of variable cross-section reed with high strength of a kind of 1800MPa level, its major technique step is following:
(1) reed blanking;
(2) centre bore processing;
(3) common shot-peening does not promptly have under the condition under the bending stress at normal temperature each face of reed is carried out shot-peening, and the shot diameter is 0.6mm～1.0mm;
(4) variable cross-section moulding;
(5) side cut grasswort;
(6) quench, temper: hardening heat is between 860 ℃～920 ℃, be incubated after 20～30 minutes, oil cooling, and coat at piece surface and to prevent the decarburization protective coating, temperature is 425 ℃～500 ℃, is incubated 90～120 minutes;
(7) temperature control stress shot blasting, 150 ℃～300 ℃ of control reed temperature, under the bending stress more than the 1000MPa, the employing diameter is that the shot of 0.6mm～1.0mm carried out shot-peening 5～15 minutes with the speed of 50～90m/s to receiving the tension face then;
(8) insulation is handled, and holding temperature is: 150 ℃～300 ℃, be 15～45 minutes heat time heating time;
(9) free shot-peening is handled the free shot-peening that receives the tension face, and the shot diameter is 0.3mm～0.8mm;
(10) assembly assembling,
(11) precompressed is strengthened.
The invention has the beneficial effects as follows; Be not only applicable to 60Si2CrVA (modified) and make the above variable cross-section reed with high strength of 1800MPa level; After suitably adjusting the Q-tempering technological parameter; Also applicable to using multiple spring steel such as 51CrMoV4,60SiCrV7; Make variable cross-section reed with high strength, improved the surface quality of reed, increased the residual compressive stress (reed surface longitudinal residual compressive stress can reach more than the 800MPa) behind the reed stress shot blasting; Improve ability and the fatigue life (is that 930MPa, minimum stress are that the alternate load effect of 68MPa can reach more than 200,000 times following fatigue life at maximum stress) of the stress relaxation-resistant of reed, can satisfy the requirements such as lightweight, long-life and raising comfortableness of automobile thus.
The specific embodiment
The present invention in actual use; It adopts 60Si2CrVA (modified), and it includes in regular turn: reed blanking, centre bore processing, common shot-peening, variable cross-section moulding, side cut grasswort, Q-tempering processing, temperature control stress shot blasting, insulation processing, free shot-peening, assembly assembling, precompressed reinforcement etc.In described Q-tempering treatment process, hardening heat is 910 ℃, is incubated 25 minutes, oil cooling, and temperature is 480 ℃, is incubated 100 minutes.In described temperature control stress spray operation, control reed temperature is at 200 ℃, and under the bending stress more than the 1000MPa, the employing diameter is that the shot of 0.8mm～1.0mm carried out shot-peening 10 minutes with the speed of 80m/s to receiving the tension face then.After described temperature control stress shot blasting operation, can carry out 150 ℃ insulation again and handle, be 25 minutes heat time heating time.
The object of the invention further realizes through following technological solution:
The above variable cross-section reed with high strength manufacturing process of aforesaid a kind of 1800MPa level; Be provided with a common bead operation after the reed blanking operation before the described therein variable cross-section molding procedure; Promptly do not have under the condition under the bending stress each face of reed is carried out shot-peening, descaling and reduce the skin decarburization layer at normal temperature.
The above variable cross-section reed with high strength manufacturing process of aforesaid a kind of 1800MPa level is provided with a pair of free bead operation that receives the tension face after the described therein assembly assembly process preincubation treatment process, the shot diameter is 0.3mm～0.8mm.
Claims (1)
1. above manufacture method of variable cross-section reed with high strength of 1800MPa level, its characteristics are may further comprise the steps:
(1) reed blanking;
(2) centre bore processing;
(3) common shot-peening does not promptly have under the condition under the bending stress at normal temperature each face of reed is carried out shot-peening, and the shot diameter is 0.6mm～1.0mm;
(4) variable cross-section moulding;
(5) side cut grasswort;
(6) quench, temper: hardening heat is between 860 ℃～920 ℃, be incubated after 20～30 minutes, oil cooling, and coat at piece surface and to prevent the decarburization protective coating, temperature is 425 ℃～500 ℃, is incubated 90～120 minutes;
(7) temperature control stress shot blasting, 150 ℃～300 ℃ of control reed temperature, under the bending stress more than the 1000MPa, the employing diameter is that the shot of 0.6mm～1.0mm carried out shot-peening 5～15 minutes with the speed of 50～90m/s to receiving the tension face then;
(8) insulation is handled, and holding temperature is: 150 ℃～300 ℃, be 15～45 minutes heat time heating time;
(9) free shot-peening, to receiving the free bead of tension face, the shot diameter is 0.3mm～0.8mm;
(10) assembly assembling;
(11) precompressed is strengthened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010100046098A CN101829882B (en) | 2010-01-11 | 2010-01-11 | Manufacture method of variable cross-section reed with high strength of more than 1800 MPa |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010100046098A CN101829882B (en) | 2010-01-11 | 2010-01-11 | Manufacture method of variable cross-section reed with high strength of more than 1800 MPa |
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| CN101829882A CN101829882A (en) | 2010-09-15 |
| CN101829882B true CN101829882B (en) | 2012-01-25 |
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Families Citing this family (12)
| 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 |
| CN103358234B (en) * | 2013-07-19 | 2015-09-30 | 山东海华汽车部件有限公司 | A kind of reed waste heat stress shot blasting technique |
| CN103949856B (en) * | 2014-04-25 | 2016-06-01 | 哈尔滨飞机工业集团有限责任公司 | A kind of method improving extension spring force value |
| CN105834673A (en) * | 2015-01-12 | 2016-08-10 | 潘玉山 | Curled lug production technique for small lifting lug plate spring |
| CN104668907A (en) * | 2015-01-30 | 2015-06-03 | 南通弘峰机电有限公司 | Machining process for large spring pieces |
| CN106498142A (en) * | 2015-09-07 | 2017-03-15 | 南京工程学院 | A kind of stress shot blasting method in variable cross-section reed with high strength manufacture |
| CN105586483A (en) * | 2016-01-29 | 2016-05-18 | 济南方大重弹汽车悬架有限公司 | Automobile leaf spring surface ringworm-like spot improving technology |
| CN108869594A (en) * | 2018-06-21 | 2018-11-23 | 南京依维柯汽车有限公司 | A kind of high stress, the variable cross-section single-leaf spring and its manufacturing method of high life |
| CN111022541A (en) * | 2019-12-30 | 2020-04-17 | 山东雷帕得汽车技术股份有限公司 | High-stress few-leaf front spring for tractor |
| CN112171191B (en) * | 2020-09-18 | 2022-03-15 | 河南凯银机械设备科技有限公司 | Short-flow processing technology for automobile plate spring |
| CN112375970A (en) * | 2020-10-20 | 2021-02-19 | 东风汽车底盘系统有限公司 | Spring steel and processing method thereof |
| CN114134291B (en) * | 2021-12-01 | 2023-03-24 | 南京工程学院 | Method for prolonging fatigue life of high-strength variable-cross-section transverse plate spring |
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| JP3098064B2 (en) * | 1991-06-13 | 2000-10-10 | トピー工業株式会社 | Improved austempering heat treatment method for thin leaf springs |
| CN1607995A (en) * | 2001-12-26 | 2005-04-20 | 日本发条株式会社 | Leaf spring for vehicle and method of manufacturing the leaf spring |
| CN101397629A (en) * | 2007-09-26 | 2009-04-01 | 南京依维柯汽车有限公司 | High intensity variable section spring piece under high stress and method for producing the same |
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| JP3098064B2 (en) * | 1991-06-13 | 2000-10-10 | トピー工業株式会社 | Improved austempering heat treatment method for thin leaf springs |
| CN1607995A (en) * | 2001-12-26 | 2005-04-20 | 日本发条株式会社 | Leaf spring for vehicle and method of manufacturing the leaf spring |
| CN101397629A (en) * | 2007-09-26 | 2009-04-01 | 南京依维柯汽车有限公司 | High intensity variable section spring piece under high stress and method for producing the same |
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| CN101829882A (en) | 2010-09-15 |
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Effective date of registration: 20160711 Address after: 246005 three point nine square kilometers Industrial Park, Anqing Development Zone, Anhui Patentee after: ANQING ANHUANG AUTOMOBILE PARTS & ACCESSORIES CO., LTD. Address before: 246005 3.9 square kilometers Industrial Park, Anqing Development Zone, Anhui Patentee before: Anhui Anhuang Machinery Co., Ltd. |