CN104690495A - Manufacturing process of high-stress suspension spring - Google Patents
Manufacturing process of high-stress suspension spring Download PDFInfo
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- CN104690495A CN104690495A CN201310644563.XA CN201310644563A CN104690495A CN 104690495 A CN104690495 A CN 104690495A CN 201310644563 A CN201310644563 A CN 201310644563A CN 104690495 A CN104690495 A CN 104690495A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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- Crystallography & Structural Chemistry (AREA)
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Abstract
The invention discloses a manufacturing process of a high-stress suspension spring. The manufacturing process performs the following steps in sequence: a precise spring coiling step: a primary finished product of the high-stress suspension spring is formed; a tempering destressing step: the tempering destressing annealing is performed for the primary finished product produced by precise spring coiling equipment; a constant temperature step: the constant temperature treatment is performed for the destressed primary finished product; a thermal pressing step: the primary finished product is thermally compressed after the constant temperature treatment under a heating condition; a thermal shot blasting step: the shot blasting is performed for the thermally pressed primary finished product; a stress shot blasting step: the stress shot blasting is performed for the primary finished product after the thermal shot blasting at a normal temperature to form a semi-finished product; and a surface treatment step is performed for the semi-finished product after the stress shot blasting to form a spring finished product. The process controls the whole shape of the spring in the spring coiling to guarantee the uniformity of the spring stress distribution, and adopts such steps as the thermal pressing, the thermal shot blasting and the stress shot blasting to largely improve the spring fatigue strength and the load stability under high stress so as to achieve the purpose of large-batch production of the high-stress suspension spring.
Description
Technical field
The invention belongs to manufacture field, particularly relate to a kind of manufacturing process of heavily stressed bearing spring.
Background technology
Along with the propelling of automotive light weight technology, the stress level that auto parts and components bear is more and more higher.For bearing spring, due to lightweight, heavily stressed design and devdlop, over nearly 20 years, bearing spring quality reduces about 25%, the stress level of domestic automobile bearing spring, by originally general below 1000MPa, has brought up to more than 1100MPa, the highest close to 1200MPa.But 1200MPa is not the limit of spring light-weight design, on the popular automobile platform MQB being about to release, the highest design stress value of bearing spring has exceeded 1300MPa.At present, it is main that inner spring enterprise of state also mainly adopts conventional ball blast to add the technique of colding pressing, and the spring stress level that can manufacture is at below 1150MPa.How to realize the first-class problem creating domestic and even international Spring Industry of heavily stressed bearing spring.
Summary of the invention
Object of the present invention can not meet to solve existing spring production process the stress level problem that spring increases day by day, and the manufacturing process of a kind of heavily stressed bearing spring provided.The present invention, by accurately controlling spring shape, and in conjunction with hot pressing, hot ball blast and stress ball blast technique, thus improves the fatigue strength of spring, solves heavily stressed bearing spring in the past and produces difficult problem.
The technical scheme that the present invention takes is: a kind of manufacturing process of heavily stressed bearing spring, and order performs following steps:
Accurate wind spring step: by accurate wind spring equipment, raw material is carried out wind spring by the physical dimension of design, form the first finished product of heavily stressed bearing spring;
Tempering destressing step: tempering stress relief annealing is carried out to the first finished product of accurate wind spring equipment output;
Constant temperature step: constant temperature process is carried out to the first finished product after destressing;
Heat-press step: in a heated condition the first completed belt heat after constant temperature is compressed;
Hot ball blast step: shot-peening is carried out to the first completed belt heat after hot pressing;
Stress ball blast step: carry out stress shot blasting at normal temperatures to the first finished product after hot peening, forms semi-finished product;
Surface protection step: the semi-finished product after counter stress ball blast carry out surface treatment, forms spring finished product.
The manufacturing process of above-mentioned a kind of heavily stressed bearing spring, wherein, described accurate wind spring step refers to and adopts the shape of shape correlation technique to the first finished product of wind spring to control, and ensures that spring shape is consistent with designing requirement.
The manufacturing process of above-mentioned a kind of heavily stressed bearing spring, wherein, described shape correlation technique comprises shooting correlation technique.
The manufacturing process of above-mentioned a kind of heavily stressed bearing spring, wherein, in described tempering destressing step, heating and temperature control is between 300 ~ 400 DEG C, and the time is 30 ~ 90 minutes.
The manufacturing process of above-mentioned a kind of heavily stressed bearing spring, wherein, in described constant temperature step, the temperature of described constant temperature process controls between 200 ~ 350 DEG C.
The manufacturing process of above-mentioned a kind of heavily stressed bearing spring, wherein, in described heat-press step, adopt forcing press to compress the first finished product after constant temperature, during compression, spring temperature should between 170 ~ 300 DEG C, and decrement is 1/4 ~ 1/3 of spring design height.
The manufacturing process of above-mentioned a kind of heavily stressed bearing spring, wherein, described hot ball blast step is: spring is with heat to carry out shotblasting process in its natural state in shot-blasting machine, during ball blast, spring temperature controls between 150 ~ 250 DEG C, and ball blast strength control is in A type A Erman test piece camber 0.35 ~ 0.60.
The manufacturing process of above-mentioned a kind of heavily stressed bearing spring, wherein, described stress ball blast step is: again to spring-compressed, reduction length is 1/3 ~ 2/3 of natural length, in shot-blasting machine, carry out shotblasting process more under compression, ball blast strength control is in A type A Erman test piece camber 0.35 ~ 0.60.
The present invention is owing to have employed above technical scheme, and its technique effect produced is obvious:
1, by accurately controlling shape of product when wind spring, the problem of stress concentration produced because of shape defect is avoided;
2, adopt hot-pressing technique, hot ball blast technology and stress ball blast technology, improve spring in the stability of heavily stressed lower load and fatigue life, thus reach the batch production object of heavily stressed bearing spring.
Accompanying drawing explanation
Fig. 1 is process flow diagram of the present invention.
Fig. 2 is the structural principle schematic diagram of the spring outline detector of the accurate wind spring of matching used control with spring coiling machine.
Detailed description of the invention
Specific features performance of the present invention is further described by reference to the accompanying drawings by following embodiment.
Refer to Fig. 1, Fig. 1 is process flow diagram of the present invention.The manufacturing process of a kind of heavily stressed bearing spring of the present invention, order performs following steps: the accurate wind spring step 1 that spring shape is controlled, eliminate camber of spring internal stress destressing tempering step 2, make spring keep the constant temperature step 3 of specified temp, improve the heat-press step 4 of heavily stressed bearing spring load stability and fatigue behaviour, improve the hot ball blast step 5 of heavily stressed bearing spring fatigue life and stress ball blast step 6, surface protection step 7.Wherein: in order to ensure the precision of wind spring, in accurate wind spring step, adopting (as shooting correlation technique) to control the shape of wind spring, certain shape correlation technique correlation technique of such as making a video recording can be adopted to monitor spring shape.Its principle is positioned in equipment by spring, by camera in equipment, spring shape is taken, the image of shooting and the spring of design or good sample image are contrasted by computer process, to ensure the consistent of spring shape and design, avoid because difference in shape causes the concentration phenomenon of stress.This equipment can show red to the part exceeding setting range and report to the police on screen.The present embodiment is in spring coiling machine, employ a kind of spring outline detector, and its structure as shown in Figure 2.Comprise: comprise housing 80, the detection part be arranged in housing, detection part comprises industrial computer 81, display screen 82, at least one CCD photographing module 83, carrying and the driving rotary part 84 of fixing measured workpiece, the isochronous controller 85 controlling the anglec of rotation and control CCD photographing module sync pulse jamming and a warning device (not shown).In using, isochronous controller controls the anglec of rotation that servomotor rotates swivel mount, namely controls the angle that measured workpiece rotates; When turning to set angle, controller is stopped operating by this swivel mount of Serve Motor Control, and Synchronization Control CCD photographing module is taken pictures to the measured workpiece being in this angle; Then be rotated further second angle of swivel mount to setting, then take the photo of this angle; Until this measured workpiece of setting revolves turn around (360
0) the photo of all angles all clapped.After shooting, all photos are delivered in industrial computer by video output cable by CCD photographing module, are spliced by the image mosaic processing module of industrial computer.Again the picture of splicing is carried out analysis with the picture concerned in the standard spring Image Database be stored in industrial computer to contrast, draw error amount; Again this error amount and standard of tolerance or deviation setting table are compared, if met the requirements, then detect and pass through; If undesirable, then show that measured workpiece has problems, and outputs to spring coiling machine by signal, the parameter of adjustment spring coiling machine wind spring, same to alarm.
The step of tempering destressing is heated to by spring between 300 ~ 400 DEG C, is incubated 30 ~ 90 minutes.Spring after destressing remains between specified temp 200 ~ 350 DEG C by constant temperature step, carries out constant temperature process.Heat-press step is 1/4 ~ 1/3 of the natural length extremely designed by the spring-compressed of uniform temperature to be had after this constant temperature process, makes spring-load meet particular requirement.Hot ball blast step is that the spring of uniform temperature is done surface Hardening Treatment in its natural state in shot-blasting machine, in conjunction with stress ball blast step, significantly can improve the fatigue strength of spring.Again to spring-compressed in stress ball blast step, reduction length is 1/3 ~ 2/3 of natural length, carries out shotblasting process more under compression in shot-blasting machine, and ball blast strength control is in A type A Erman test piece camber 0.35 ~ 0.60.
Be described in detail below in conjunction with the manufacturing process of specific embodiment to heavily stressed bearing spring of the present invention more:
Embodiment one:
By shape correlation technique, debugging wind spring program, makes the spring shape that rolls consistent with the shape of design.After program debugging puts in place, roll spring, and whether timing selective examination sample also meets shape need.First finished product spring after rolling is sent in tempering furnace by conveyer belt and is carried out stress relief annealing, the present embodiment tempering furnace Fen Liuge district, and one to four district is refined zone, and 5th district are transition region, and 6th district are flat-temperature zone.Wherein: the temperature in a district controls at about 300 ~ 380 DEG C, the temperature in two districts of district to four controls at 380 ~ 395 DEG C, and five district's temperature are at about 200 ~ 280 DEG C, and the temperature in 6th district controls at about 200 ~ 285 DEG C.Tempering time is 60 minutes.Flat-temperature zone spring is out derived through conveyer belt, be placed on hot-press equipment (such as Morita hot press) by manipulator and carry out hot pressing, temperature during hot pressing controls between 180 ~ 250 DEG C, compression height is about 1/3 (accurate compression height is followed and determined according to final burden requirement) of the former length of spring, after having compressed, spring recovers nature, put into shot-blasting machine by manipulator again to carry out being with hot ball blast, temperature during ball blast is between 160 ~ 230 DEG C, and ball blast intensity is A type A Erman test piece camber about 0.42.Spring heat carries out water-cooled after throwing, and then put into stress shot-blasting machine by manipulator and carry out stress ball blast, decrement during spring ball blast is about 1/2 of former length, and ball blast intensity is A type A Erman test piece camber about 0.4.Roll stress ball blast from spring to terminate all to adopt full-automatic operation.After stress ball blast, upper paint line carries out surface protection process.
Embodiment two:
By shape correlation technique, debugging wind spring program, makes the spring shape that rolls consistent with the shape of design.After program debugging puts in place, roll spring, and whether timing selective examination sample also meets shape need.Spring after rolling is sent in tempering furnace by conveyer belt and is carried out stress relief annealing; tempering furnace Fen Sige district; one district's temperature controls at about 300 ~ 385 DEG C; two district's temperature control at about 385 ~ 400 DEG C; 3rd district are that temperature controls about 300 ~ 350; 4th district are flat-temperature zone, and temperature controls at about 300 ~ 350 DEG C; Tempering time is 30 minutes.Flat-temperature zone spring is out derived through conveyer belt, be placed on Morita hot-press equipment by manipulator and carry out hot pressing, temperature during hot pressing is between 220 ~ 300 DEG C, compression height is about 1/3 (accurate compression height is followed and determined according to final burden requirement) of the former length of spring, after having compressed, spring recovers nature, then puts into new eastern shot-blasting machine band heat by manipulator and carry out ball blast, temperature during ball blast is between 180 ~ 250 DEG C, and ball blast intensity is A type A Erman test piece camber about 0.35.Spring heat carries out water-cooled after throwing, and then put into new eastern stress shot-blasting machine by manipulator and carry out stress ball blast, decrement during spring ball blast is about 1/2 of former length, and ball blast intensity is A type A Erman test piece camber about 0.35.Roll stress ball blast from spring to terminate all to adopt full-automatic operation.After stress ball blast, upper paint line carries out surface protection process.
Embodiment three:
By shape correlation technique, debugging wind spring program, makes the spring shape that rolls consistent with the shape of design.After program debugging puts in place, roll spring, and whether timing selective examination sample also meets shape need.Spring after rolling is sent in tempering furnace by conveyer belt and is carried out stress relief annealing; tempering furnace Fen Wuge district; one district's temperature controls at about 300 ~ 370 DEG C; two to three district's temperature control at about 370 ~ 385 DEG C; 4th district are transition zone; temperature controls at about 200 ~ 250 DEG C, and 5th district are flat-temperature zone, and temperature controls at about 200 ~ 250 DEG C; Tempering time is 90 minutes.Flat-temperature zone spring is out derived through conveyer belt, be placed on Morita hot-press equipment by manipulator and carry out hot pressing, temperature during hot pressing is between 170 ~ 230 DEG C, compression height is about 1/4 (accurate compression height is followed and determined according to final burden requirement) of the former length of spring, after having compressed, spring recovers nature, then puts into new eastern shot-blasting machine band heat by manipulator and carry out ball blast, temperature during ball blast is between 150 ~ 210 DEG C, and ball blast intensity is A type A Erman test piece camber about 0.55.Spring heat carries out water-cooled after throwing, and then put into new eastern stress shot-blasting machine by manipulator and carry out stress ball blast, decrement during spring ball blast is about 1/2 of former length, and ball blast intensity is A type A Erman test piece camber about 0.55.Roll stress ball blast from spring to terminate all to adopt full-automatic operation.After stress ball blast, upper paint line carries out surface protection process.
The manufacturing process of the heavily stressed bearing spring of the present invention, for the manufacture of the heavily stressed bearing spring of production.By the employing of this technique, more heavily stressed spring can be made to reach the fatigue life requirements of regulation, meet the requirement of the heavily stressed development of motor spring lightweight.
Claims (8)
1. a manufacturing process for heavily stressed bearing spring, order performs following steps:
Accurate wind spring step: by accurate wind spring equipment, raw material is carried out wind spring by the physical dimension of design, form the first finished product of heavily stressed bearing spring;
Tempering destressing step: tempering stress relief annealing is carried out to the first finished product of accurate wind spring equipment output;
Constant temperature step: constant temperature process is carried out to the first finished product after destressing;
Heat-press step: in a heated condition the first completed belt heat after constant temperature is compressed;
Hot ball blast step: shot-peening is carried out to the first completed belt heat after hot pressing;
Stress ball blast step: carry out stress shot blasting at normal temperatures to the first finished product after hot peening, forms semi-finished product;
Surface protection step: the semi-finished product after counter stress ball blast carry out surface treatment, forms spring finished product.
2. the manufacturing process of a kind of heavily stressed bearing spring according to claim 1, is characterized in that, described accurate wind spring step refers to and adopts the shape of shape correlation technique to the first finished product of wind spring to control, and ensures that spring shape is consistent with designing requirement.
3. the manufacturing process of a kind of heavily stressed bearing spring according to claim 1, is characterized in that, described shape correlation technique comprises shooting correlation technique.
4. the manufacturing process of a kind of heavily stressed bearing spring according to claim 1, is characterized in that, in described tempering destressing step, heating and temperature control is between 300 ~ 400 DEG C, and the time is 30 ~ 90 minutes.
5. the manufacturing process of a kind of heavily stressed bearing spring according to claim 1, is characterized in that, in described constant temperature step, the temperature of described constant temperature process controls between 200 ~ 350 DEG C.
6. the heavily stressed bearing spring manufacturing process of one according to claim 1, it is characterized in that, in described heat-press step, adopt forcing press to compress the first finished product after constant temperature, during compression, spring temperature should between 170 ~ 300 DEG C, and decrement is 1/4 ~ 1/3 of spring design height.
7. the manufacturing process of a kind of heavily stressed bearing spring according to claim 1, it is characterized in that, described hot ball blast step is: spring is with heat to carry out shotblasting process in its natural state in shot-blasting machine, during ball blast, spring temperature controls between 150 ~ 250 DEG C, and ball blast strength control is in A type A Erman test piece camber 0.35 ~ 0.60.
8. the manufacturing process of a kind of heavily stressed bearing spring according to claim 1, described stress ball blast step is: again to spring-compressed, reduction length is 1/3 ~ 2/3 of natural length, in shot-blasting machine, carry out shotblasting process more under compression, ball blast strength control is in A type A Erman test piece camber 0.35 ~ 0.60.
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| CN201310644563.XA CN104690495A (en) | 2013-12-05 | 2013-12-05 | Manufacturing process of high-stress suspension spring |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673286A (en) * | 2016-01-29 | 2016-06-15 | 烟台南山学院 | Manufacturing device and method for oil nozzle pressure adjusting spring |
| CN108296740A (en) * | 2018-04-27 | 2018-07-20 | 东莞福哥电子有限公司 | A kind of rocking bar spring assembling device |
| CN109559920A (en) * | 2018-12-25 | 2019-04-02 | 浙江金昌弹簧有限公司 | A kind of high-voltage breaker spring preparation process |
| CN110681807A (en) * | 2019-08-27 | 2020-01-14 | 泰州市苏源汽车配件有限公司 | Spring curling and forming treatment process applied to display screen steering system |
| CN110814236A (en) * | 2019-11-22 | 2020-02-21 | 常州泰瑞弹簧有限公司 | Spring coiling method for compression spring based on automatic spring coiling machine |
| CN110842067A (en) * | 2019-11-22 | 2020-02-28 | 常州泰瑞弹簧有限公司 | Method for manufacturing spring of shock absorber sleeve coil |
| CN111306229A (en) * | 2020-03-03 | 2020-06-19 | 沈阳和世泰通用钛业有限公司 | Small-wire-diameter titanium alloy spring and preparation method and application thereof |
| CN112080623A (en) * | 2020-08-12 | 2020-12-15 | 山东联美弹簧科技股份有限公司 | Light high-stress suspension spring strengthening production process |
| CN112439852A (en) * | 2019-08-28 | 2021-03-05 | 上海中国弹簧制造有限公司 | Spring hot-pressing method |
| CN112725602A (en) * | 2020-12-08 | 2021-04-30 | 申海宏 | Method and device for manufacturing high-stress suspension spring with uniform tempering |
| CN113073176A (en) * | 2021-03-22 | 2021-07-06 | 重庆中海弹簧有限公司 | Spring manufacturing process |
| CN114769351A (en) * | 2022-03-30 | 2022-07-22 | 厦门立洲五金弹簧有限公司 | Manufacturing process of high-stress spring |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673286A (en) * | 2016-01-29 | 2016-06-15 | 烟台南山学院 | Manufacturing device and method for oil nozzle pressure adjusting spring |
| CN108296740A (en) * | 2018-04-27 | 2018-07-20 | 东莞福哥电子有限公司 | A kind of rocking bar spring assembling device |
| CN108296740B (en) * | 2018-04-27 | 2024-04-12 | 东莞福哥电子有限公司 | Rocker spring assembling device |
| CN109559920A (en) * | 2018-12-25 | 2019-04-02 | 浙江金昌弹簧有限公司 | A kind of high-voltage breaker spring preparation process |
| CN110681807A (en) * | 2019-08-27 | 2020-01-14 | 泰州市苏源汽车配件有限公司 | Spring curling and forming treatment process applied to display screen steering system |
| CN112439852A (en) * | 2019-08-28 | 2021-03-05 | 上海中国弹簧制造有限公司 | Spring hot-pressing method |
| CN110814236A (en) * | 2019-11-22 | 2020-02-21 | 常州泰瑞弹簧有限公司 | Spring coiling method for compression spring based on automatic spring coiling machine |
| CN110842067A (en) * | 2019-11-22 | 2020-02-28 | 常州泰瑞弹簧有限公司 | Method for manufacturing spring of shock absorber sleeve coil |
| CN111306229A (en) * | 2020-03-03 | 2020-06-19 | 沈阳和世泰通用钛业有限公司 | Small-wire-diameter titanium alloy spring and preparation method and application thereof |
| CN112080623A (en) * | 2020-08-12 | 2020-12-15 | 山东联美弹簧科技股份有限公司 | Light high-stress suspension spring strengthening production process |
| CN112725602A (en) * | 2020-12-08 | 2021-04-30 | 申海宏 | Method and device for manufacturing high-stress suspension spring with uniform tempering |
| CN113073176A (en) * | 2021-03-22 | 2021-07-06 | 重庆中海弹簧有限公司 | Spring manufacturing process |
| CN114769351A (en) * | 2022-03-30 | 2022-07-22 | 厦门立洲五金弹簧有限公司 | Manufacturing process of high-stress spring |
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Application publication date: 20150610 |