CN109136475A - Improve the method for closing door bolt spring fatigue life - Google Patents
Improve the method for closing door bolt spring fatigue life Download PDFInfo
- Publication number
- CN109136475A CN109136475A CN201810916522.4A CN201810916522A CN109136475A CN 109136475 A CN109136475 A CN 109136475A CN 201810916522 A CN201810916522 A CN 201810916522A CN 109136475 A CN109136475 A CN 109136475A
- Authority
- CN
- China
- Prior art keywords
- spring
- door bolt
- bolt spring
- fatigue life
- peening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
-
- 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
- C21D7/08—Modifying the physical properties of iron or steel by deformation by cold working of the surface by burnishing or the like
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a kind of methods for improving and closing door bolt spring fatigue life, include: the material surface quality of Optimal Spring steel, spring steel is turned into pass door bolt spring, fastens heattreatment of spring with a bolt or latch to closing, heat treatment eliminates temper brittleness using the rapid cooling process of tempering water cooling；Shot peening strengthening is carried out to door bolt spring is closed；Reach surface peening effect using specification into the conveying speed in compressed air shotblasting machine, rotation speed, bullet by adjusting door bolt spring is closed；Swirling flows are carried out to pass door bolt spring using tooling is suppressed, pass door bolt spring is made to press simultaneously state completely.Present invention efficiently solves the technical problems that the fatigue life of spring is low.
Description
Technical field
The present invention relates to a kind of processing methods of spring, specifically, are related to a kind of side improved and close door bolt spring fatigue life
Method.
Background technique
Currently, spring also has increasingly been used for as important part with the fast development of domestic equipment manufacture
Significant points, the performance and used life of spring just determine the safety and stability of equipment, therefore the fatigue life of spring
It is Key Performance Indicator.
There are the flaws such as shadow scratch, small hairline in the surface of the common cold tensile spring steel of Current Domestic, spring is being rolled up
Process spring inner surface processed bears compression, and outer surface bears tensile stress, System of Detecting Surface Defects For Material is caused to extend, suppress with
And surface treatment process fault in material ultimate extension, cause the fatigue life of part to reduce.
Summary of the invention
Technical problem solved by the invention is to provide a kind of method for improving and closing door bolt spring fatigue life, efficiently solves
The fatigue life of spring low technical problem.
Technical solution is as follows:
A method of it improves and closes door bolt spring fatigue life, comprising:
Spring steel is turned to pass door bolt spring, heattreatment of spring is fastened with a bolt or latch to closing, at heat by the material surface quality of Optimal Spring steel
Reason eliminates temper brittleness using the rapid cooling process of tempering water cooling；
Shot peening strengthening is carried out to door bolt spring is closed；It is fast into the conveying speed in compressed air shotblasting machine, rotation by adjusting door bolt spring is closed
Degree, bullet reach surface peening effect using specification；
Swirling flows are carried out to pass door bolt spring using tooling is suppressed, pass door bolt spring is made to press simultaneously state completely.
Further, spring steel selects hot rolling polishing to expect to carry out the material surface quality of Optimal Spring steel.
Further, in heat treatment, 850~870 DEG C to quench out furnace oil cold, and 410~450 DEG C of tempering are come out of the stove water cooling.
Further, closing the conveying speed 1m/min of door bolt spring in shot blasting on surface processing, the rotation speed 5r/ of door bolt spring is closed
Min, bullet use 1.0mm cast steel ball, and shot-peening test piece and first part are carried out shot-peening simultaneously before shot-peening, detect camber angle value
With the surface coverage of part.
Further, increasing compensation gasket, wedge shaped detents positioning using positioning long hole when swirling flows；It is padded using compensation
Piece guarantees that part suppresses process part and is in pressure and state completely, has achieved the purpose that stabilizer elements size and uniformly strengthened.
The technology of the present invention effect includes:
Present invention efficiently solves the technical problems that the fatigue life of spring is low.The present invention, which can be improved, closes door bolt spring
Anti-fatigue performance eliminates the residual deformation for closing door bolt spring, improves the stability for closing door bolt spring.
Detailed description of the invention
Fig. 1 is that tooling is suppressed in the present invention to the schematic diagram for closing door bolt spring progress swirling flows.
Specific embodiment
Be described below and specific embodiments of the present invention be fully shown, with enable those skilled in the art to practice and
It reproduces.
The method for closing door bolt spring fatigue life is improved, specifically includes the following steps:
Step 1: the material surface quality of Optimal Spring steel；
It selects polishing material that cold tensile spring steel is replaced to carry out the material surface quality of Optimal Spring steel, improves the surface shape of spring steel
State.For the spring of important use, the material surface state of spring steel is improved, hot rolling polishing material is selected, bullet can be eliminated
The problem of spring material surface light defects and roughness difference influence fatigue life.
Step 2: spring steel being turned into pass door bolt spring, fastens heattreatment of spring with a bolt or latch to closing, heat treatment is fast using tempering water cooling
Fast cooling process method eliminates temper brittleness；
In heat treatment, 850~870 DEG C to quench out furnace oil cold, and 410~450 DEG C of tempering are come out of the stove water cooling, for Cr-Si-V,
Si-Mn series has temper brittleness spring material, and the tempering slow cooling and rapid cooling after fire of having quenched have larger impact to material fragility.Institute
Temper brittleness can be eliminated using the technique of tempering water cooling.
Step 3: carrying out shot peening strengthening to door bolt spring is closed；By adjusting close door bolt spring into compressed air shotblasting machine conveying speed,
Rotation speed, bullet reach surface peening effect using specification；
Specifically: use ZJ220 helical spring shot-blasting machine, workpiece conveying speed 1m/min, workpiece rotation speed 5r/min,
Bullet uses 1.0mm cast steel ball, and shot-peening test piece and first part are carried out shot-peening simultaneously before shot-peening, detects camber angle value and zero
The surface coverage of part.Meet WJ 2028-91 steel components Shot Peening Technology condition.
Surface peening after molding uses shot peening strengthening, so that spring surface is generated certain residual pressure by the injection of bullet
Stress improves its anti-fatigue performance.
As shown in Figure 1, being to suppress tooling in the present invention to the schematic diagram for closing door bolt spring progress swirling flows.
Step 4: using tooling is suppressed to door bolt spring progress swirling flows are closed, being in pass door bolt spring and press simultaneously state completely.
Suppress tooling Bao Guan door bolt spring during suppressing in completely pressure and state, reached stabilizer elements size and
The purpose of even reinforcing eliminates the residual deformation for closing door bolt spring, improves the stability for closing door bolt spring.
Compensation gasket, wedge shaped detents positioning are increased using positioning long hole.Using compensation gasket, guarantee that part suppresses process
Part is in pressure and state completely, has achieved the purpose that stabilizer elements size and has uniformly strengthened.
Embodiment 1
1, original is chosen into cold tensile spring steel 60Si2CrVA/11-14-GB/T905-1994；It improves and chooses hot rolling polishing material
60Si2CrVA GB/T1222-2007-/14-2-GB/T702-2004,1 group precision；
2, spring steel is turned into pass door bolt spring, the heat treatment process for closing door bolt spring is determined as 850~870 DEG C of quenchings and comes out of the stove
Oil is cold, and 410~450 DEG C are tempered water cooling of coming out of the stove.
3, the shot blasting on surface for closing door bolt spring is handled；Workpiece conveying speed 1m/min, workpiece rotation speed 5r/min, bullet
Using 1.0mm cast steel ball, before shot-peening shot-peening test piece and pass door bolt spring is subjected to shot-peening simultaneously, detects the table of camber angle value and part
Face coverage rate.Meet WJ 2028-91 steel components Shot Peening Technology condition.
4, using suppress tooling to close door bolt spring carry out swirling flows.
Suppress tooling guarantee part suppress process part be in completely pressure and state, reached stabilizer elements size and uniformly
The purpose of reinforcing.
5, dynamic test index: carrying out 32r/min dynamic test between 283.5mm~342.5mm, carry out fatigue test and examine
Core, fatigue life > 106 times.
Fatigue Life Comparison: cold drawing material spring 32r/min, which recycles 86430 times, to be continued to be broken for 45 hours；Polishing material spring
32r/min, which recycles 150156 times, to be continued to be broken for 78.2 hours.
It should be understood that the foregoing is merely a specific embodiment of the invention, but protection scope of the present invention is not
It is confined to this, anyone skilled in the art in the technical scope disclosed by the present invention, can readily occur in variation
Or replacement, it should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with the claim
Protection scope subject to.
Claims (5)
1. a kind of improve the method for closing door bolt spring fatigue life, comprising:
Spring steel is turned to pass door bolt spring, fastens heattreatment of spring with a bolt or latch to closing, heat treatment is adopted by the material surface quality of Optimal Spring steel
With the rapid cooling process of tempering water cooling, temper brittleness is eliminated；
Shot peening strengthening is carried out to door bolt spring is closed；Spring is fastened with a bolt or latch into the conveying speed in compressed air shotblasting machine, rotation speed, bullet by adjusting closing
Ball reaches surface peening effect using specification；
Using tooling is suppressed to door bolt spring progress swirling flows are closed, it is in pass door bolt spring and presses simultaneously state completely.
2. improving the method for closing door bolt spring fatigue life as described in claim 1, it is characterised in that: spring steel selects hot rolling polishing
Material carrys out the material surface quality of Optimal Spring steel.
3. improving the method for closing door bolt spring fatigue life as described in claim 1, it is characterised in that: in heat treatment, 850~870
It is cold DEG C to quench out furnace oil, 410~450 DEG C of tempering are come out of the stove water cooling.
4. improving the method for closing door bolt spring fatigue life as described in claim 1, it is characterised in that: in shot blasting on surface processing, close
It fastens the conveying speed 1m/min of spring with a bolt or latch, closes the rotation speed 5r/min of door bolt spring, bullet uses 1.0mm cast steel ball, will before shot-peening
Shot-peening test piece and first part carry out shot-peening simultaneously, detect the surface coverage of camber angle value and part.
5. improving the method for closing door bolt spring fatigue life as described in claim 1, it is characterised in that: when swirling flows, using fixed
Bit length hole increases compensation gasket, wedge shaped detents positioning；Using compensation gasket, guarantee that part suppresses process part and is in pressure completely
And state, achieve the purpose that stabilizer elements size and has uniformly strengthened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810916522.4A CN109136475A (en) | 2018-08-13 | 2018-08-13 | Improve the method for closing door bolt spring fatigue life |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810916522.4A CN109136475A (en) | 2018-08-13 | 2018-08-13 | Improve the method for closing door bolt spring fatigue life |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109136475A true CN109136475A (en) | 2019-01-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810916522.4A Pending CN109136475A (en) | 2018-08-13 | 2018-08-13 | Improve the method for closing door bolt spring fatigue life |
Country Status (1)
| Country | Link |
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| CN (1) | CN109136475A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115011776A (en) * | 2022-05-25 | 2022-09-06 | 杭州保佳弹簧有限公司 | Spring forced compression treatment process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101125402A (en) * | 2007-10-10 | 2008-02-20 | 大连弹簧有限公司 | Method for processing heat coiling spring whose spring wire diameter is 90 millimeter |
| CN101691884A (en) * | 2009-08-28 | 2010-04-07 | 超化公司 | Cambered surface disc spring and manufacturing method thereof |
| CN102888500A (en) * | 2012-10-26 | 2013-01-23 | 国家电网公司 | Heat treatment process of thermoforming spring |
| CN103725984A (en) * | 2013-12-26 | 2014-04-16 | 浙江美力科技股份有限公司 | High-tenacity high-strength spring steel |
-
2018
- 2018-08-13 CN CN201810916522.4A patent/CN109136475A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101125402A (en) * | 2007-10-10 | 2008-02-20 | 大连弹簧有限公司 | Method for processing heat coiling spring whose spring wire diameter is 90 millimeter |
| CN101691884A (en) * | 2009-08-28 | 2010-04-07 | 超化公司 | Cambered surface disc spring and manufacturing method thereof |
| CN102888500A (en) * | 2012-10-26 | 2013-01-23 | 国家电网公司 | Heat treatment process of thermoforming spring |
| CN103725984A (en) * | 2013-12-26 | 2014-04-16 | 浙江美力科技股份有限公司 | High-tenacity high-strength spring steel |
Non-Patent Citations (2)
| Title |
|---|
| 中国机械工程学会热处理专业分会 等编: "《热处理手册（第3版） 第2卷 典型零件热处理》", 31 July 2001, 机械工业出版社 * |
| 罗辉: "《机械弹簧制造技术》", 30 September 1987, 机械工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115011776A (en) * | 2022-05-25 | 2022-09-06 | 杭州保佳弹簧有限公司 | Spring forced compression treatment process |
| CN115011776B (en) * | 2022-05-25 | 2024-06-07 | 杭州保佳弹簧有限公司 | Spring strong-pressure treatment process |
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20190104 |