CN102962376B - A kind of closing method of self-locking nut - Google Patents
A kind of closing method of self-locking nut Download PDFInfo
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- CN102962376B CN102962376B CN201210254151.0A CN201210254151A CN102962376B CN 102962376 B CN102962376 B CN 102962376B CN 201210254151 A CN201210254151 A CN 201210254151A CN 102962376 B CN102962376 B CN 102962376B
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Abstract
The invention discloses a kind of closing method of self-locking nut, get intensity σ
bthe self-locking nut of≤1100MPa, heat-treat after tapping and surface treatment, then carry out initial workpiece to close up and locking property test, according to the technological parameter that result of the test adjustment is closed up, to self-locking nut crimping by the gross afterwards, the present invention changes closing in flow process, first self-locking nut by the gross heat-treated and after surface treatment, carry out closing in test again, ensure that equipment, the uniformity of die adjustment parameter, particular avoid the heat treatment after test of closing up, surface-treated inconsistency, owing to ensure that the uniformity of various state, add the lasting elasticity of its intensity after nut heat treatment, not only solve the stability problem of locking torque, also shorten the cycle of test of closing up, the inventive method is suitable for the self-locking nut of intensity at 1100Mpa.
Description
Technical field
The present invention relates to self-locking nut technical field, particularly relate to a kind of closing method of self-locking nut.
Background technology
The processing of the self-locking structure of current Aeronautics and Astronautics securing member self-locking nut can affect its locking property owing to being subject to the impact of material inconsistency, therefore, every a collection of nut all will carry out initial workpiece (in small batches) closing in test before formal closing in, through the nut of initial workpiece closing in test, first verify whether its locking property reaches standard, again according to the result of initial workpiece (in small batches) closing in test, revise bottling technique parameter.Bottling technique generally carries out before the heat treatment, main program is: test → adjust bottling technique parameter → (if needs, again carrying out testing and adjusting process) → close up by the gross by traditional bottling technique to initial workpiece (in small batches) closing in → heat treatment → locking property.But for a long time, there is a lot of drawback in this closing method, mainly long because of this method test cycle, inconsistency is there is in the actual adjustment state etc. that the heat treatment of closing in test, surface treatment, closing-in mould close up with series-produced state, cause closing up by the gross and cannot embody the requirement of test of closing up, this must cause the locking torque after batch production unstable.In actual production, the locking torque that often there will be initial workpiece closing in test is very stable, and the situation of batch locking torque instability.Close up test and concrete actual requirement generally all very high, as long as occur that in closing in, heat treatment, surface treatment the error of any one link is all by the stability of impact batch locking torque, and batch produce undesirable time, often to reprocess through doing over again, greatly adding the market cost of product, postponement production cycle.
Summary of the invention
Technical problem to be solved by this invention is the defect that locking torque is unstable, the production cycle is long overcoming existing closing in test method, provides a kind of locking torque to stablize, the closing method of self-locking nut with short production cycle.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme:
The closing method of self-locking nut of the present invention: get intensity σ
bthe self-locking nut of≤1100MPa, heat-treat after tapping and surface treatment, then carry out initial workpiece to close up and locking property test, according to result of the test adjustment bottling technique parameter, again carry out closing in and locking property test, until locking torque dispersion is screwed into the 80%, the 15th 150% of minimum locking torque>=regulation of back-outing of maximum locking torque≤regulation for the 1st time, incite somebody to action self-locking nut crimping by the gross afterwards; Described bottling technique parameter is closing in radial diameter and closing in length.
In above-mentioned closing method, when carrying out locking property test, take the principle that closing in screw thread radial-deformation is minimum, closing in deformation length is the longest.When such principle makes to lock, bolt test plug contacts to deformation plance completely with self-locking nut threading path, ensures that being screwed into the locking torque back-outed with the 15th time for the 1st time stablizes.
The material of aforementioned self-locking nut is carbon steel, steel alloy, high temperature alloy, aluminium alloy or copper alloy.
The closing method of aforementioned self-locking nut, the adjustment standard of described bottling technique parameter is the 15-25% being screwed into maximum moment and the 15th minimum moment of back-outing with batch locking torque value at the 1st time, is preferably 20%.
Compared with prior art, the present invention changes closing in flow process, first self-locking nut by the gross heat-treated and after surface treatment, carry out closing in test again, ensure that the uniformity of equipment, die adjustment parameter, particular avoid the heat treatment after test of closing up, surface-treated inconsistency, owing to ensure that the uniformity of various state, add the lasting elasticity of its intensity after nut heat treatment, not only solve the stability problem of locking torque, also shorten the cycle of test of closing up, the inventive method is suitable for the self-locking nut of intensity at 1100Mpa.
Detailed description of the invention
Get intensity σ
bthe self-locking nut of≤1100MPa, heat-treat after tapping and surface treatment, then minimum according to closing in screw thread radial-deformation, the principle that closing in deformation length is the longest is carried out initial workpiece and is closed up and locking property test, according to result of the test adjustment bottling technique parameter, bottling technique parameter mainly refers to closing in radial diameter and closing in length, the adjustment standard of bottling technique parameter is the 15-25% being screwed into maximum moment and the 15th minimum moment of back-outing with batch locking torque value at the 1st time, be preferably 20%, again carry out closing in and locking property test, until being screwed into maximum moment for the 1st time is 4.903Nm, 15th time minimum moment of back-outing is 0.392Nm, to self-locking nut crimping by the gross afterwards.The method test period is short, first initial workpiece (in small batches) examination is closed up, then locking property test is carried out immediately, adjusted closing in dimensional parameters according to locking property test situation and met locking property test, once the requirement of locking property agreement with experimental, fix with by closing in dimensional parameters, carry out a batch closing in.The drawing of this closing in test method solves locking torque instability problem after traditional closing in test method greatly.
Above method is applicable to the self-locking nut that material is carbon steel (ML18, ML25), steel alloy (16CrSiNi, 30CrMnSiA) and high temperature alloy (GH2132), aluminium alloy, copper alloy.
Self-locking closing in test method traditionally, general each batch of examination is closed up on-test, the cycle that closing in → heat treatment → surface treatment → locking torque tests this process wants about one week, if the locking torque dispersion tested first large needs carries out secondary closing in test, this batch of production life cycle obtains about 10 days at least.And according to closing in test method of the present invention, in closing in, the cycle of two procedures is shortened in the middle of locking torque test, and with the heat treatment of batch product and the state consistency of surface-treated closing in testpieces and batch product, simultaneously Closing in die can keep closing up test and batch state consistency, decrease the error of mode transfer, ensure that three is unified, i.e. heat treatment, surface treatment, the unification of closing in state, the closing in test period cycle of the inventive method generally only needed about half a day, production cycle with batch product at least shortens one week, guarantee is conformity provided simultaneously also for product quality.Principle due to this closing in size is that radial closing in deflection is little, increase closing in length as far as possible, ensure to close up to test when doing locking torque after distortion plug and self-locking nut be screwed into revolve with after effective area that coordinates large, guarantee coefficient of friction in locking torque friction test is large, and self-locking nut coordinates the elasticity of area to keep good.The product of such as model GB930-88, specification M8, material ML18, surface treatment Zincing passivation, heat treatment 36-39HRC, require to be screwed into maximum moment 4.903Nm the 1st time, 15th the minimum moment 0.392Nm that back-outs, closing in size radial-deformation 0.2-0.25, closing in length is between 2 times of pitch to 3 times pitch, test locking torque value is respectively and is screwed into maximum moment 3.92-4.23Nm and the 15th for the 1st time and back-outs minimum moment 0.52-0.65Nm, batch locking torque is within the scope of it, and similar products do not enumerate.The present invention is that self-locking nut series products provides good closing method, has the advantage that the cycle is short, locking torque is stable, is worthy to be popularized.
Claims (5)
1. a closing method for self-locking nut, is characterized in that: get intensity σ
bthe self-locking nut of≤1100MPa, heat-treat after tapping and surface treatment, then carry out initial workpiece to close up and locking property test, according to result of the test adjustment bottling technique parameter, again carry out closing in and locking property test, until locking torque dispersion is screwed into the 80%, the 15th 150% of minimum locking torque>=regulation of back-outing of maximum locking torque≤regulation for the 1st time, incite somebody to action self-locking nut crimping by the gross afterwards; Described bottling technique parameter is closing in radial diameter and closing in length.
2. according to the closing method of self-locking nut described in claim 1, it is characterized in that: when carrying out locking property test, take the principle that closing in screw thread radial-deformation is minimum, closing in deformation length is the longest.
3. according to the closing method of self-locking nut described in claim 1, it is characterized in that: the material of described self-locking nut is carbon steel, steel alloy, high temperature alloy, aluminium alloy or copper alloy.
4. according to the closing method of self-locking nut described in claim 1, it is characterized in that: the adjustment standard of described bottling technique parameter is with the 15-25% of batch locking torque value in the 1st time and the 15th time moment values of standard-required.
5., according to the closing method of self-locking nut described in claim 4, it is characterized in that: the adjustment standard of described bottling technique parameter be with batch locking torque value standard-required the 1st time and the 15th time moment values 20%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210254151.0A CN102962376B (en) | 2012-07-23 | 2012-07-23 | A kind of closing method of self-locking nut |
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| CN201210254151.0A CN102962376B (en) | 2012-07-23 | 2012-07-23 | A kind of closing method of self-locking nut |
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| CN102962376A CN102962376A (en) | 2013-03-13 |
| CN102962376B true CN102962376B (en) | 2015-11-11 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105522070B (en) * | 2015-12-12 | 2017-10-20 | 中国航空工业标准件制造有限责任公司 | A kind of closing method of titanium alloy self-locking nut |
| CN113798798A (en) * | 2021-09-30 | 2021-12-17 | 中国航空工业标准件制造有限责任公司 | Preparation method of high-temperature-resistant lock nut for commercial automobile |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB571927A (en) * | 1943-02-02 | 1945-09-14 | Allied Control Co | Improvements in the production of self-locking nuts |
| SU804895A1 (en) * | 1979-02-23 | 1981-02-15 | Komarnitskij Ivan A | Nut |
| CN101486047A (en) * | 2009-02-25 | 2009-07-22 | 沪东重机有限公司 | Method for producing whole metal self-locking nut |
| CN101905272A (en) * | 2010-07-12 | 2010-12-08 | 贵州大学 | Self-locking nut crimping processing method |
-
2012
- 2012-07-23 CN CN201210254151.0A patent/CN102962376B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB571927A (en) * | 1943-02-02 | 1945-09-14 | Allied Control Co | Improvements in the production of self-locking nuts |
| SU804895A1 (en) * | 1979-02-23 | 1981-02-15 | Komarnitskij Ivan A | Nut |
| CN101486047A (en) * | 2009-02-25 | 2009-07-22 | 沪东重机有限公司 | Method for producing whole metal self-locking nut |
| CN101905272A (en) * | 2010-07-12 | 2010-12-08 | 贵州大学 | Self-locking nut crimping processing method |
Non-Patent Citations (2)
| Title |
|---|
| 典型螺母加工工艺研究;金秀芳;《航空精密制造技术》;CNKI;20110430;第47卷(第2期);第45-48页 * |
| 航空航天工业部第三O一研究所.自锁螺母技术条件.《GB943-88》.1989,第1-9页. * |
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Inventor after: Yang Jiuxi Inventor after: Chen Xiaoxiao Inventor after: Wang Feng Inventor after: Zou Gang Inventor before: Yang Jiuxi Inventor before: Chen Xiaoxiao Inventor before: Wang Feng Inventor before: Zhou Gang |
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