CN103937948A - Controllable deformation technology for metal surface - Google Patents
Controllable deformation technology for metal surface Download PDFInfo
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- CN103937948A CN103937948A CN201410189279.2A CN201410189279A CN103937948A CN 103937948 A CN103937948 A CN 103937948A CN 201410189279 A CN201410189279 A CN 201410189279A CN 103937948 A CN103937948 A CN 103937948A
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Abstract
The invention relates to a controllable deformation technology for a metal surface, and relates to a technology for performing deformation treatment on a metal to improve the surface layer stress distribution of the metal and an intelligent control technology. According to the surface temperature distribution, the stress distribution and the like of a to-be-treated part, an intelligent control program is written, so that an array composed of multiple strikers is controlled, and impact deformation treatment having a specific strength and a specific frequency is performed on a to-be-treated region of the to-be-treated part; the impact strength and the impact frequency of each striker are under the control of the program written in advance, thereby sufficiently satisfying the deformation requirements of the material treated by the array without going to the extent of causing excessive deformation and crack; and each point of the treated surface is subjected to influence of repeated impacts of the multiple strikers and thus are deformed multiple times. Each striker in the array composed of the multiple strikers is singly controlled by a control system, and the strikers do not interfere with each other, thereby ensuring that sufficient deformation can be obtained in a depression of a three-dimensional curved surface.
Description
Technical field
The present invention relates to a kind of controlled deformation techniques of metallic surface.The controlled deformation techniques of this metallic surface relates to carries out deformation process to improve technology and the intelligent control technology of metal surface stress distribution to metal.
Technical background
In the course of processing of metallic substance, tend to because the reason such as the different sites temperature variation of component is asynchronous causes the inner residual internal stress of component after processing, this stress may cause multiple adverse consequences.
The first adverse consequences that residual internal stress may cause is: excessive deformation.Once deflection exceedes the tolerance zone of use or following process permission, may cause component to be scrapped.
The second adverse consequences that residual internal stress may cause is: part cracking.If the residualinternal stress value of some characteristic portion of part exceedes the intensity of material, will there is crack propagation, material cracking in part.
The third adverse consequences that residual internal stress may cause is: component go wrong in follow-up life-time service process.The first problem that may occur is strength decreased, in use procedure, component can be subject to the effect of applied stress, if some characteristic portion applied stress and the residualinternal stress of part superpose, if the stress after stack has exceeded the intensity of material, will there is crack propagation, material cracking in part under lower applied stress effect, shows as the strength decreased of component.The Second Problem that may occur is that shape, the size of component change, and affect the running accuracy of component because stressed condition in life-time service process changes, and even may cause component to be scrapped.
The residualinternal stress kind difference, the present position difference that in the course of processing of metallic substance, produce, also can difference huge on the impact of component.Near residual tension component surface is the most dangerous, have the greatest impact, and most adverse consequencess are all to be caused by the residual tension of near surface.
Laser melting and coating technique is a kind ofly to utilize laser energy to act on welding wire or welding powder welds the technology of covering to metallic element surface, be widely used in strengthening, functionalization and the repair process on metallic element surface, more and more wider in field application such as vehicle mould reparations, the main problem existing is at present the cracking that after cladding, huge residual tension brings.
Must be by welding wire or welding powder fusing during due to cladding, more than laser scanning must be heated to fusing point by welding wire or welding powder, and it is very low by the metallic matrix temperature of cladding, so there is the huge temperature head of cladding layer and matrix and huge thermograde, in temperature-fall period after laser beam is inswept, the huge range of decrease of cladding layer temperature has determined that obvious contraction will occur for it, and the thickness of matrix is much larger than cladding layer, this contraction that has just determined cladding layer will be suppressed, so there is near the huge residual tension of the rear cladding layer of cooling, toward carrying out Laser Cladding Treatment forward, the region of just cladding several times starts cracking below.
In order to address this problem, the way of mainly taking is at present select the scolder that plasticity is fabulous or in time stress processing fallen in cladding layer, for example: select expensive nickel-base alloy as scolder, thereby or in time cladding layer is reheated to process and fall stress to reduce thermograde, or in time manual knocking makes cladding layer viscous deformation discharge stress.
Summary of the invention
Although nickel-base alloy has been alleviated problem of Cracking effectively as scolder, metallic nickel is more expensive, and performance is single, is difficult to meet mould etc. and requires to repair rear surface high strength, the requirement such as wear-resisting; Thereby can reduce thermograde and fall stress though reheat to process, opportunity, difficult grasp, processed the generation that is still difficult to not in time avoid cracking; Knock by hand the measure that makes cladding layer viscous deformation discharge stress and too rely on operator's experience, and effect is limited.
The present invention is intended to find a kind of intelligentized, deformation process technology of being widely used in multiple material, Various Tissues and performance requriements, not only can effectively alleviate tensile stress, even can obtain the residual stress in part top layer, and certain working hardening effect.
Principal feature of the present invention is: fully studying on the basis of pending surface temperature distribution, stress distribution and deformation rule, establishment intelligent control program, to control the array being formed by multiple strikers, the pending region of pending is implemented to the impact deformation processing of certain strength, CF.
The array of multiple strikers composition, the shock strength of each striker, frequency of impact, under the time variable control weaving in advance, fully meet the surface deformation needs of battle array of living in position machined material, and don't as for causing excessive deformation and cracking.
The every bit of machined surface, all can stand the impact of repeatedly repeated stock of multiple strikers and repeatedly deformation.
In array due to multiple striker compositions, each striker is controlled separately the control of system, non-interference between striker, even if machined surface is three-dimension curved surface, also can ensure that the recess of three-dimension curved surface obtains enough deformation.
If processed to liking the cladding layer just having formed, concerning on it a bit, this deformation will continue in a larger temperature range, it when duration starts, may be austenite structure, may be then pearlitic structure or martensitic stucture or mixed structure, this continuing can be alleviated each temperature range effectively, the stress that various tissues form, until a certain lower temperature deformation finishes, when final cladding layer is consistent with work piece temperature, the tensile stress of cladding layer is alleviated greatly, even can obtain certain residual compressive stress and further improve the surface property of part.
Brief description of the drawings
Accompanying drawing is a kind of controlled deformation techniques implementation process schematic diagram of metallic surface: (1) is controlled deformation array; (2) be that striker (3) is controlled deformation array working direction; (4) be region to be processed.
Embodiment
The to be processed region (4) of the controlled deformation array (1) being arranged in by many strikers (2) along direction (3) towards front advances, each root striker (2) in controlled deformation array (1) is all subject to independent control, can, with specific surging force and specific frequency of impact single movement, treat the treatment of surfaces of components and carry out deformation processing.
The surging force of each root striker (2) and the setting of frequency of impact, depend on temperature, the tissue of impact moment composition and the phase composite of piece surface to be processed corresponding position.If the good phases of plasticity such as corresponding position is supercooled austenite, can adopt appropriate surging force and higher frequency of impact; If the very poor phase of plasticity such as corresponding position is martensite, the surging force that suitable employing is larger and lower frequency of impact; If the general phase of plasticity such as corresponding position is perlite, the surging force that suitable employing is larger and higher frequency of impact.
Claims (3)
1. the controlled deformation techniques of a metallic surface, it is characterized in that: the array of multiple striker compositions, the pending region of pending is implemented to the impact deformation processing of certain strength, CF, shock strength, the frequency of impact of each striker are all controlled, fully meet the deformation needs of battle array of living in position machined material, and don't as for causing excessive deformation and cracking.
2. by the controlled deformation techniques of a kind of metallic surface claimed in claim 1, it is characterized in that: non-interference between striker, even if machined surface is three-dimension curved surface, also can ensure that the recess of three-dimension curved surface obtains enough deformation.
3. by the controlled deformation techniques of a kind of metallic surface claimed in claim 1, it is characterized in that: if processed to liking the cladding layer just having formed, concerning on it a bit, this deformation will continue in a larger temperature range, it when duration starts, may be austenite structure, may be then pearlitic structure or martensitic stucture or mixed structure, this continuing can be alleviated each temperature range effectively, the stress that various tissues form, until a certain lower temperature deformation finishes, when final cladding layer is consistent with work piece temperature, the tensile stress of cladding layer is alleviated greatly, even can obtain certain residual compressive stress and further improve the surface property of part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410189279.2A CN103937948A (en) | 2014-05-07 | 2014-05-07 | Controllable deformation technology for metal surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410189279.2A CN103937948A (en) | 2014-05-07 | 2014-05-07 | Controllable deformation technology for metal surface |
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| CN103937948A true CN103937948A (en) | 2014-07-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201410189279.2A Pending CN103937948A (en) | 2014-05-07 | 2014-05-07 | Controllable deformation technology for metal surface |
Country Status (1)
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| CN (1) | CN103937948A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3661655A (en) * | 1970-11-17 | 1972-05-09 | North American Rockwell | Metallic articles and the manufacture thereof |
| CN102654053A (en) * | 2011-03-04 | 2012-09-05 | 刘素华 | Efficient block mining machine |
| CN102678130A (en) * | 2012-06-01 | 2012-09-19 | 张永忠 | Multi-punch pin special push pipe |
-
2014
- 2014-05-07 CN CN201410189279.2A patent/CN103937948A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3661655A (en) * | 1970-11-17 | 1972-05-09 | North American Rockwell | Metallic articles and the manufacture thereof |
| CN102654053A (en) * | 2011-03-04 | 2012-09-05 | 刘素华 | Efficient block mining machine |
| CN102678130A (en) * | 2012-06-01 | 2012-09-19 | 张永忠 | Multi-punch pin special push pipe |
Non-Patent Citations (1)
| Title |
|---|
| 杨永红等: "《现代飞机机翼壁板数字化喷丸成型技术》", 31 August 2012, 西北工业大学出版社 * |
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Effective date of registration: 20160114 Address after: 130012 Changchun Qianjin Street, Jilin, No. 2699 Applicant after: Jilin University Address before: 130026 floor, second teaching building, No. 5988 Renmin Street, Jilin, Changchun Applicant before: Wang Yingwei |
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| CB03 | Change of inventor or designer information |
Inventor after: Wang Yingwei Inventor after: Zhang Yongyi Inventor after: Cao Yanjun Inventor after: Cheng Wenzhu Inventor after: Hou Ting Inventor before: Wang Yingwei Inventor before: Cao Yanjun Inventor before: Cheng Wenzhu Inventor before: Hou Ting |
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Application publication date: 20140723 |
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| RJ01 | Rejection of invention patent application after publication |