CN108673065A - The manufacture craft of spring - Google Patents
The manufacture craft of spring Download PDFInfo
- Publication number
- CN108673065A CN108673065A CN201810559789.2A CN201810559789A CN108673065A CN 108673065 A CN108673065 A CN 108673065A CN 201810559789 A CN201810559789 A CN 201810559789A CN 108673065 A CN108673065 A CN 108673065A
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- Prior art keywords
- spring
- ball blast
- tempering
- diameter
- creep
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Springs (AREA)
- Wire Processing (AREA)
Abstract
The present invention relates to a kind of manufacture crafts of spring.A kind of manufacture craft of spring, including following process：Wind spring spools steel wire according to rotation direction, prefabricated height, outer diameter and the number of turns, and the both ends of spring are simultaneously tight；Spring is put into tempering furnace and carries out destressing tempering by tempering；Cross grinding, by the grinding two end surfaces of spring, angle of grinding surface is more than 300 degree；Ball blast three times is carried out, the diameter of first time ball blast is more than the diameter of second of ball blast, and the diameter of second of ball blast is more than the diameter of third time ball blast；Creep tempering compresses the spring into position length and is fixed on fixture, and the fixture with spring is put into tempering furnace and is kept the temperature, and i.e. water cooling of coming out of the stove is to room temperature；Cleaning；Demagnetization；Antirust treatment.Service life that the present invention provides one kind under high stress is long, the low spring manufacturing process of the heat fade rate of spring；Solve that spring existing in the prior art service life under high stress is short, the high technical problem of the heat fade rate of spring.
Description
Technical field
The present invention relates to a kind of manufacture craft of spring more particularly to a kind of making works for requiring the heat fade rate of spring small
Skill.
Background technology
Spring is very universal in present application, all trades and professions according to different purposes using varying strength rigidity and
The spring of service life.Therefore the manufacturing process of spring is also not quite similar.Have in present open file：" high stress valve bullet
The manufacturing process (CN101439458A) of spring " includes following process：Wire stock roll-forming is semi-finished product spring by wind spring；
It is tempered for the first time, spring is subjected to lonneal destressing；Spring is ground, two end faces of spring are ground, needed for reaching
Length；Chamfering removes spring burr after grinding；Stress optimization；Second of tempering carries out lonneal again to spring and goes
Stress；Shot-peening improves the fatigue life of spring；Hot pressing；Load classification, the spring overproof to load are rejected, and load is qualified
Product just becomes heavily stressed valve spring product；It oils, oils to heavily stressed valve spring product, prepare packaging.It is above-mentioned
The technique of the spring disclosed in file is directed to a kind of technique of spring of high stress valve, under high pressure for finished product spring
Service life and heat fade amount do not require.
Invention content
Service life that the present invention provides one kind under high stress is long, the low spring manufacturing process of the heat fade rate of spring；
Solve that spring existing in the prior art service life under high stress is short, the high technical problem of the heat fade rate of spring.
Invention also provides a kind of product qualification rate height, reduce the spring manufacturing process of the hot wire-CVD of spring；It solves
Product qualification rate existing in the prior art is not high enough, the big technical problem of the hot wire-CVD of spring.
The above-mentioned technical problem of the present invention is solved by following technical proposals：A kind of manufacture craft of spring, it is special
Sign is：Including following process：The first step, wind spring spool steel wire according to rotation direction, prefabricated height, outer diameter and the number of turns, spring
Both ends are simultaneously tight；
Spring is put into tempering furnace and carries out destressing tempering by second step, tempering；
Third walks, cross grinding, and by the grinding two end surfaces of spring, angle of grinding surface is more than 300 degree；
4th step, ball blast carry out ball blast three times, and the diameter of first time ball blast is more than the diameter of second of ball blast, second
The diameter of ball blast is more than the diameter of third time ball blast；
5th step, creep tempering compress the spring into position length and are fixed on fixture, and the fixture with spring is put into
It is kept the temperature in tempering furnace, i.e. water cooling of coming out of the stove is to room temperature；
6th step, cleaning, cleans spring with supersonic wave cleaning machine；
7th step, demagnetization；
8th step, antirust treatment.
In manufacture craft, using ball blast three times, spring inner surface compression reaches -976MPa, and peak stress reaches -
1246MPa reaches -1163MPa away from surface 0.04mm depth stress, is in operating pressure by the fatigue life of spring
1100MPa, stroke are increased to 2,000,000 times when being 30mm from 800,000 times, and the diameter of ball blast successively decreases every time, improves superficial layer
Residual stress, and improve the finish on surface.In order to reduce the heat fade amount of spring, using creep tempering technique, first
Continuous mesh belt type tempering furnace will be put into togerther together with the fixed fixture of compression again after the spring-compressed to position length of ball blast
In, i.e. water cooling of coming out of the stove after heat preservation is to room temperature, and by the spring that creep tempering is handled, heat fade rate is from normal heat swirling flows
3.62~4.21% are reduced to 1.44~1.64%, meet the small of the equipment requirement spring heat fade rate that some use spring
In 3% requirement.Pollutant ＜ 8mg/m2 after cleaning, 5 Gausses of remanent magnetism ＜ after demagnetization.Spring after treatment is outstanding
It is suitable for being used in automobile torque converter, it is desirable that fatigue life of the spring under thermal environment high stress, and need relatively low
Heat fade rate.
Preferably, a diameter of 0.6~0.8mm of the first time ball blast, ball blast frequency is 60HZ, second of ball blast
A diameter of 0.4~0.6mm, ball blast frequency is 50HZ, a diameter of 0.2~0.3mm of third time ball blast, and ball blast frequency is
The time of 50HZ, each ball blast are 20~40 minutes.Ball blast selects different parameter values respectively three times, according to the desired machine of spring
Tool performance is set, and suitable shot diameter and ball blast frequency is selected to can be only achieved the mechanical performance of spring requirement, for the first time
The frequency of ball blast with the frequency of ball blast is different twice below, when being further processed twice after, the shot of different-diameter is adopted
It is carried out with different frequencies.Ball blast improves 1.5 times relative to secondary ball blast fatigue life three times.
More preferably, the temperature of the creep tempering is 200 DEG C~300 DEG C, heat preservation 20~after forty minutes.Above-mentioned
It is tempered and is kept the temperature in temperature and time in range, reduced hot wire-CVD deflection, improve the mechanical performance of spring.
Preferably, the prefabricated height=finished product length+creep attenuation length, the position length is spring
Minimum active length, creep attenuation are that the creep tempering experiment according to spring in position length obtains.Creep attenuation
Creep tempering experiment temperature be 200 DEG C~300 DEG C, keep the temperature 20~40 minutes, show that creep declines by above-mentioned experiment
Decrement.The length of the spring processed as needed is different, come determine different wind springs precast length and creep tempering positioning
Length improves the qualification rate of product.
Preferably, before wind spring, initial workpiece sample is carried out, all production process processing is completed, determines that final finished is
It is no to meet drawing requirement, and processing parameter is finely adjusted.First trial operation one time on assembly line, so as to better
Adjust corresponding technological parameter so that qualification rate is high when batch production, cuts operating costs and improves yield rate.
More preferably, raw material are checked before initial workpiece sample, checks steel wire diameter, Tensile strength, table
Face quality.Inspection to material, it is ensured that normal work of the spring in hot oil environment.
Preferably, being inserted into size separation step between the 5th step creep tempering and the cleaning of the 6th step.By grder man
Sequence realizes first of production inspection to spring, improves yield rate.
Preferably, the temperature of the destressing tempering of second step is 400 DEG C~420 DEG C, soaking time is 55~65 minutes.
Therefore, the manufacture craft of spring of the invention has following advantages：Using three-level ball blast improve spring high stress,
Fatigue life under long test trip so that apply spring in the environment of relatively high request；Meanwhile using creep tempering
Technique compares original heat pressing process, can reduce hot wire-CVD deflection, reduces heat fade amount, it is total can to meet fluid torque-converter
At requirement.
Specific implementation mode
Below by embodiment, the technical solution of invention is described in further detail.
Embodiment 1：
The manufacture craft of spring, including following process：
The first step, wind spring spool steel wire according to rotation direction, prefabricated height, outer diameter and the number of turns, and the both ends of spring are simultaneously tight, complete
At preliminary spring shape；
Spring is put into tempering furnace and carries out destressing tempering by second step, tempering；
Third walks, cross grinding, and by the grinding two end surfaces of spring, angle of grinding surface is more than 300 degree；
4th step, ball blast carry out ball blast three times, and the diameter of first time ball blast is more than the diameter of second of ball blast, second
The diameter of ball blast is more than the diameter of third time ball blast, and the ball blast frequency of first time is more than the ball blast frequency of second and third time,
The ball blast time three times is identical, and residual stress and fatigue life are improved after ball blast；
5th step, creep tempering compress the spring into position length and are fixed on fixture, and the fixture with spring is put into
It is kept the temperature in tempering furnace, i.e. water cooling of coming out of the stove reduces hot wire-CVD and deflection to room temperature, improves heat fade rate；
6th step, cleaning, cleans spring with ultrasonic wave；
7th step, demagnetization；
8th step, antirust treatment immerse in antirust oil.
Wherein prefabricated height=finished product length+creep attenuation length, position length are the minimum active length of spring, creep
Attenuation is obtained according to creep test of the spring in position length.The spring of target call processing is first taken, is determined
Bit length is known, after compressing the spring into position length, in the tempering furnace that temperature is 240 DEG C, keeps the temperature 35 minutes,
Creep attenuation is obtained by above-mentioned experiment.Experiment calculation creep attenuation length is carried out, to obtain prefabricated height, according to experiment
Data are processed according to above-mentioned technique.
Embodiment 2：
If necessary to make length be 68mm, outer diameter be 13.5mm spring, using the present invention spring manufacture craft,
Wind spring is carried out first, and by steel wire coil around and by the both ends of spring and tight, the spring parameter after winding is 13.6 ± 0.1mm, prefabricated
Highly 79 ± 0.5mm, number of total coils 17.8；Then, to the good spring of wind spring in the tempering furnace that temperature is 410 ± 10 DEG C
Destressing tempering is carried out, tempering insulation time is 60 ± 3 minutes；After the completion of temper, end face is carried out to the both ends of the surface of spring
Grinding, both ends polish, and angle of grinding surface is more than 300 degree；Shot Blasting is carried out after grinding, Shot Blasting includes 3 ball blasts, for the first time
In frequency it is ball blast 30 minutes in the shot-blasting machine of 60HZ with the shot of a diameter of 0.6mm, then carries out second of ball blast again, second
Secondary ball blast is ball blast 30 minutes in the shot-blasting machine of 50HZ in frequency with the shot of a diameter of 0.4mm, carries out third time after carrying out again
Ball blast, third time ball blast use the shot of a diameter of 0.3mm in frequency for ball blast in the shot-blasting machine of 50HZ 30 minutes,；By throwing
Treated that spring is put into tempering furnace carries out creep tempering for ball, and creep tempering is to be compressed to the spring after ball blast using fixture
Position length 36.5mm (i.e. the minimum active length of spring) is simultaneously fixed, and fixture is then put into 240 degree continuous with spring
In net belt tempering furnace, heat preservation is come out of the stove after 35 minutes, and for i.e. water cooling to room temperature, the length of spring after cooling is 68mm；Then with super
Sound wave cleaning machine cleans spring, makes pollutant ＜ 8mg/m2, spring is demagnetized with demagnetization meter after cleaning so that remanent magnetism ＜
Spring immersion antirust oil is finally done antirust treatment by 5 Gausses again.
Embodiment 3：
The manufacture craft of spring, the first step check raw material, check gauge of wire, material tensile strength,
Situations such as surface quality, it is ensured that normal work of the spring in hot oil environment；Second step carries out initial workpiece sample, according to setting online
It is standby, all production process processing are completed, determine whether final finished meets drawing requirement, and processing parameter are carried out micro-
It adjusts；Third walks, and according to the outer diameter of spring and prefabricated height, the spring parameters such as number of total coils carry out wind spring, and simultaneously by the both ends of spring
Tightly；4th step carries out destressing tempering in tempering furnace, and temperature is maintained at 400 degree, keeps the temperature 60 minutes；5th step, by bullet
The both ends of spring polish, and angle of grinding surface is more than 300 degree；6th step carries out ball blast three times, a diameter of 0.7mm of first time ball blast, ball blast
Frequency is 60HZ, a diameter of 0.5mm of second of ball blast, a diameter of 0.3mm of third time ball blast, and the ball blast of second and third time is frequently
Rate is 50HZ, and ball blast is 30 minutes three times；Spring is depressed into position length with fixture, is put into tempering by the 7th step, creep tempering
It is water-cooled to room temperature after keeping the temperature 30 minutes in stove；8th step carries out size separation according to the specification requirement of product；9th step,
Spring is cleaned with supersonic cleaning machine；Tenth step is demagnetized spring with demagnetization meter；11st step integrally immerses spring
Antirust oil carries out antirust treatment；12nd step, is packed.
Claims (4)
1. a kind of manufacture craft of spring, it is characterised in that：Including following process：
The first step, wind spring, by steel wire embryo material according to prefabricated height, outer diameter and the number of turns, by both ends of spring and tight, described is prefabricated
Highly=finished product length+creep attenuation length, creep attenuation length are the creep tempering experiment in position length according to spring
It obtains, position length is the minimum active length of spring, first takes the spring of target call processing, position length is known
's；
Spring is put into tempering furnace and carries out destressing tempering by second step, tempering；
Third walks, cross grinding, and by the grinding two end surfaces of spring, angle of grinding surface is more than 300 degree；
4th step, ball blast carry out ball blast three times, and the diameter of first time ball blast is more than the diameter of second of ball blast, second of ball blast
Diameter be more than third time ball blast diameter；
5th step, creep tempering compress the spring into position length and are fixed on fixture, and the fixture with spring is put into tempering
It is kept the temperature in stove, for i.e. water cooling of coming out of the stove to room temperature, the temperature of the creep tempering is 200 DEG C~300 DEG C, keeps the temperature 20~40 minutes
Afterwards；
6th step, cleaning, cleans spring with ultrasonic wave；
7th step, demagnetization；
8th step, antirust treatment；
Using ball blast three times, spring inner surface compression reaches -976MPa, and peak stress reaches -1246MPa, away from surface
0.04mm depth stress reaches -1163MPa, is 1100MPa in operating pressure by the fatigue life of spring, when stroke is 30mm
It is increased to from 800,000 times 2,000,000 times；By the spring that creep tempering is handled, heat fade rate from the 3.62 of normal heat swirling flows~
4.21% is reduced to 1.44~1.64%.
2. the manufacture craft of spring according to claim 1, it is characterised in that：The first time ball blast it is a diameter of
0.6~0.8mm, ball blast frequency are 60HZ, and a diameter of 0.4~0.6mm of second of ball blast, ball blast frequency is 50HZ, third time
A diameter of 0.2~0.3mm of ball blast, ball blast frequency are 50HZ, and the time of each ball blast is 20~40 minutes.
3. the manufacture craft of spring according to claim 1 or 2, it is characterised in that：In the 5th step creep tempering and the 6th
It is inserted into size separation step between step cleaning.
4. the manufacture craft of spring according to claim 1 or 2, it is characterised in that：The temperature of the destressing tempering of second step
Degree is 400 DEG C~420 DEG C, and soaking time is 55~65 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810559789.2A CN108673065A (en) | 2018-06-02 | 2018-06-02 | The manufacture craft of spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810559789.2A CN108673065A (en) | 2018-06-02 | 2018-06-02 | The manufacture craft of spring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108673065A true CN108673065A (en) | 2018-10-19 |
Family
ID=63809670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810559789.2A Withdrawn CN108673065A (en) | 2018-06-02 | 2018-06-02 | The manufacture craft of spring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108673065A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111014524A (en) * | 2019-12-18 | 2020-04-17 | 安庆谢德尔汽车零部件有限公司 | Manufacturing process of high-stress spring |
| CN112178095A (en) * | 2020-09-21 | 2021-01-05 | 扬州圣林弹簧五金有限公司 | High-frequency long-life compression spring and preparation method thereof |
| CN114083246A (en) * | 2021-12-23 | 2022-02-25 | 重庆三四零三汽车零部件有限公司 | Manufacturing process of high-stress plate spring |
| CN114770039A (en) * | 2022-04-13 | 2022-07-22 | 浙江骏马弹簧制造有限公司 | High-quality spring processing technology |
-
2018
- 2018-06-02 CN CN201810559789.2A patent/CN108673065A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111014524A (en) * | 2019-12-18 | 2020-04-17 | 安庆谢德尔汽车零部件有限公司 | Manufacturing process of high-stress spring |
| CN111014524B (en) * | 2019-12-18 | 2022-04-26 | 安庆谢德尔汽车零部件有限公司 | Manufacturing process of high-stress spring |
| CN112178095A (en) * | 2020-09-21 | 2021-01-05 | 扬州圣林弹簧五金有限公司 | High-frequency long-life compression spring and preparation method thereof |
| CN114083246A (en) * | 2021-12-23 | 2022-02-25 | 重庆三四零三汽车零部件有限公司 | Manufacturing process of high-stress plate spring |
| CN114770039A (en) * | 2022-04-13 | 2022-07-22 | 浙江骏马弹簧制造有限公司 | High-quality spring processing technology |
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Application publication date: 20181019 |
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| WW01 | Invention patent application withdrawn after publication |