CN105032979A - Machining method and device for multi-layer membrane structure corrugated pipe - Google Patents
Machining method and device for multi-layer membrane structure corrugated pipe Download PDFInfo
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- CN105032979A CN105032979A CN201510523843.4A CN201510523843A CN105032979A CN 105032979 A CN105032979 A CN 105032979A CN 201510523843 A CN201510523843 A CN 201510523843A CN 105032979 A CN105032979 A CN 105032979A
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Abstract
The invention discloses a machining method and device for a multi-layer membrane structure corrugated pipe, and belongs to the technical field of corrugated pipe manufacturing. The method and device overcome the defects that a corrugated pipe manufactured through a conventional method has the short fatigue life, and is low in strength and compression rate, poor in geometric accuracy and the like. The method comprises the following steps that firstly, an annular membrane is obtained through machining; secondly, chemical milling is carried out on the surface of one side of one part of the annular membrane to form an annular concave part, and a stress concentration weakening membrane is formed; thirdly, the accurate definition of a diffusion bonding area and a non-diffusion bonding area is ensured through the sample plate shape carving step; and thirdly, an upper corrugated pipe flange, a lower corrugated pipe flange, an original specification membrane and the stress concentration weakening membrane are assembled according to a certain sequence, and diffusion bonding is finished. According to the machining method and device, machining of the multi-layer membrane structure corrugated pipe is achieved through the diffusion welding and stress relaxation combining technology method; and meanwhile the stress concentration weakening processing method is adopted for eliminating the stress concentration phenomenon produced in the corrugated pipe working process, and the fatigue life of the corrugated pipe is greatly prolonged.
Description
Technical field
The invention belongs to bellows manufacturing technology field, relate to a kind of processing method and device of multi-layer diaphragm structure bellows.
Background technology
After conventional bellows generally adopts distinguish to be shaped welding or diaphragm be shaped after molten solder mode manufacture, technological process is complicated, and evenness of wall thickness is wayward, compensation performance and anti-fatigue ability general.
Summary of the invention
The technical problem that the present invention solves is to provide a kind of processing method and device of multi-layer diaphragm structure bellows, the shortcomings such as the fatigue life that the method and device exist in order to the bellows overcoming conventional method and manufacture and intensity is low, compression ratio and geometric accuracy difference; The present invention proposes the processing adopting Diffusion Welding and stress relaxation combination technological method to achieve multi-layer diaphragm structure bellows, adopt stress to concentrate Weakening treatment method to eliminate the stress concentration phenomenon produced in the bellows course of work simultaneously, greatly improve corrugated pipe fatigue life, additionally provide a kind of device for bellows diaphragm Diffusion Welding.Use the bellows of the method and device manufacture to may be used for the structure compensation of complication system, have damping noise reduction and sealing function concurrently, chemical industry, Aero-Space and energy industry can be applied to.
Technical scheme of the present invention is: a kind of processing method of multi-layer diaphragm structure bellows, comprises the steps:
S1: processing obtains ring film;
S2: at a part of ring film side surface milling ring-shaped depression, form stress and concentrate reduction diaphragm; The ring film not carrying out milling process is called original specification diaphragm;
S3: carve shape treatment step by model and guarantee to spread accurately defining of join domain and non-diffusing join domain;
Treat that Diffusion Welding region and all stress are concentrated weaken diaphragm, original specification diaphragm both sides coating protective coating at upper flange, lower flange;
Make multiple annular model: concentrate with upper flange, lower flange and stress and weaken diaphragm, the internal diameter of each annular model that original specification diaphragm fixes be respectively upper flange, lower flange and stress concentrate weaken diaphragm, place, line of demarcation diameter of a circle that original specification diaphragm treats Diffusion Welding region and non-diffusing welding region, external diameter be respectively to concentrate with upper flange, lower flange and stress weaken diaphragm, original specification diaphragm external diameter identical;
Each annular model is concentrated with upper flange, lower flange and stress respectively and weakens diaphragm, after original specification diaphragm is mounted with, use icking tool scratches protective coating along the internal diameter of model;
Dismantle annular model, remove the protective coating of non-diffusing welding region, afterwards at exposed region coating only solder flux, finally remove remainder protective coating;
S4: assemble lower flange, original specification diaphragm and stress on bellows in certain sequence and concentrate reduction diaphragm, make it in vacuum environment, high temperature, under high pressure, complete diffusion connection procedure and drawing process:
Upper flange treat Diffusion Welding surface down, lower flange treat Diffusion Welding surface upward, the diaphragm unit of some is between upper flange and lower flange, described diaphragm unit by four stress concentrate weaken diaphragm and two original specification diaphragms in certain sequence assembly formed, built-up sequence under upper successively: concentrate for depression stress upward and weaken diaphragm, original specification diaphragm, depression stress down concentrate weaken diaphragm, depression stress is upward concentrated and is weakened diaphragm, original specification diaphragm, depression stress is down concentrated and is weakened diaphragm; And by treating that Diffusion Welding region and non-diffusing welding region are corresponding and unanimously to place between each several part;
S5: again enter vacuum drying oven, at high temperature completes stress relaxation forming process; Finally machining is carried out to bellows semi-finished product, to obtain the bellows meeting dimensional requirement.
Preferably, the ring-shaped depression degree of depth is 0.1-0.15mm.
The Diffusion Welding device of the processing method employing of described a kind of multi-layer diaphragm structure bellows, it is characterized in that, Diffusion Welding device diffusion connecting mechanism comprises: upper flange, lower flange, inner ring liner, spacing inner ring, spacing outer shroud; Fit on flange on Diffusion Welding device, lower flange, upper flange treat Diffusion Welding surface down, lower flange treat Diffusion Welding surface upward, the diaphragm unit of some is between upper flange and lower flange, inner ring liner is between spacing inner ring and diaphragm unit, and spacing outer shroud is positioned at outside diaphragm unit.
Technique effect of the present invention is:
The Diffusion Welding that the present invention adopts and the multi-layer diaphragm structure bellows that stress relaxation combination technological method manufactures, technique is simple, die cost is low, forming accuracy is high, and adopt diffusion technology for welding connection area adjustable, weld strength is high, also overcomes bellows intensity that conventional method is shaped and fatigue life is low, poor sealing, be not suitable for the shortcomings such as large deformation.
The present invention propose a kind of adopt stress to concentrate reduction after diaphragm carry out Diffusion Welding, the method for stress relaxation figuration manufacture multi-layer diaphragm structure bellows and device, in process-cycle, production cost and precision performance, all there is greater advantage.
1) adopt stress to concentrate Weakening treatment method, greatly improve corrugated pipe fatigue life.
2) compression ratio significantly promotes, and is conducive to controlling bellows overall dimensions.
3) use the welding quality of Diffusion Welding device good, Diffusion Welding region can accurately control, thus ensures bellows stable performance.
4) the final appearance and size of bellows is ensured by machining, and precision is high.
Accompanying drawing explanation
Fig. 1 a is multi-layer diaphragm structure bellows schematic diagram;
Fig. 1 b is the diaphragm unit enlarged diagram of multi-layer diaphragm structure bellows;
Fig. 2 is that ring film stress concentrates Weakening treatment schematic diagram;
Fig. 3 is flange, diaphragm assembling schematic diagram;
Fig. 4 is assembling schematic diagram before bellows Diffusion Welding;
In Fig. 1,1 is upper flange, 2 is diaphragm unit, and 3 is lower flange, and 4 weaken diaphragm for stress is concentrated, 5 is original specification diaphragm, in Fig. 3,6 is Diffusion Welding region (referring to needed Diffusion Welding surface not by the region of only solder flux covering), and 7 is non-diffusing welding region (referring to be needed only solder flux overlay area, Diffusion Welding surface, the region of black lines display in figure), in Fig. 4,8 is inner ring liner, 9 is spacing outer shroud, and 10 is spacing inner ring, and 11 connect pressure for required Diffusion Welding.
Detailed description of the invention
Below the present invention is described in further detail.
The multi-layer diaphragm structure bellows that the present invention proposes is by upper flange 1, and lower flange 3 and multiple diaphragm unit 2 form, adjacent between multiple diaphragm unit 2, and between upper flange 1 and lower flange 3.Diaphragm unit 2 by four stress concentrate weaken diaphragm 4 and two original specification diaphragms 5 in certain sequence assembly formed, assemble sequence is that stress concentrates reduction diaphragm 4 (depression upward), original specification diaphragm 5, stress is concentrated and is weakened diaphragm 4 (depression down), stress is concentrated and is weakened diaphragm 4 (depression upward), original specification diaphragm 5, stress is concentrated and is weakened diaphragm 4 (depression down).
The processing method of a kind of multi-layer diaphragm structure bellows that the present invention proposes, comprises the steps:
1), after patch blanking ring film blank, finish turning processing obtains the ring film meeting dimensional requirement.
2) be about the ring-shaped depression of 0.1-0.15mm in the ring film side surface milling degree of depth, the stress as ring film concentrates Weakening treatment, and concentrate reduction effect to obtain stress, formation stress is concentrated and weakened diaphragm 4; Original specification diaphragm 5 is the ring film not carrying out milling process.
3) membrane surface is cleared up, wipe oil.Treat that Diffusion Welding region and all stress are concentrated weaken diaphragm 4, original specification diaphragm 5 both sides coating protective coating at upper flange 1, lower flange 3; and carry out model and carve shape process (accurately defining of Diffusion Welding region 6 and non-diffusing welding region 7 is treated in realization); dismantle annular model; remove the protective coating of non-diffusing welding region 7; afterwards at exposed region coating only solder flux, finally remove remainder protective coating.
The step that shape process carved by model is: make multiple annular model, the internal diameter of each annular model be respectively upper flange 1, lower flange 3 and stress concentrate weaken diaphragm 4, original specification diaphragm 5 treats Diffusion Welding region 6 and place, non-diffusing welding region 7 line of demarcation diameter of a circle, external diameter and upper flange 1, lower flange 3 and the stress of model concentrate weaken diaphragm 4, original specification diaphragm 5 external diameter identical.Each annular model is concentrated with upper flange 1, lower flange 3 and stress respectively and weakens diaphragm 4, after original specification diaphragm 5 is mounted with, use icking tool scratches protective coating (protective coating of non-diffusing welding region 7 is separated with all the other protective coatings) along the internal diameter of model.Upper flange 1, lower flange 3 treat Diffusion Welding region 6, boundary and the stress connected of non-diffusing welding region 7 concentrate weaken diaphragm 4 surface treat Diffusion Welding region 6, the boundary of non-diffusing welding region 7 is consistent.
Stress is concentrated and is weakened diaphragm and have two kinds of different boundary treating Diffusion Welding region 6 and non-diffusing welding region 7.The first stress is concentrated and is weakened diaphragm: the surface of ring-shaped depression, and for treating Diffusion Welding region 6 outside ring-shaped depression cylindrical, all the other positions are non-diffusing welding region 7; The surface of ringless-type depression, be non-diffusing welding region 7 between ring-shaped depression inside and outside circle diameter, all the other are for treating Diffusion Welding region 6.The second stress is concentrated and is weakened diaphragm: the surface of ring-shaped depression, and for treating Diffusion Welding region 6 within ring-shaped depression inner circle, all the other positions are non-diffusing welding region 7; The surface of ringless-type depression, be non-diffusing welding region 7 between ring-shaped depression inside and outside circle diameter, all the other are for treating Diffusion Welding region 6.
Original specification diaphragm 5: be non-diffusing welding region 7 between ring-shaped depression inside and outside circle diameter, all the other are for treating Diffusion Welding region 6.
4) utilize Diffusion Welding device to assemble diaphragm, assemble the diaphragm that on bellows, lower flange, diaphragm and stress concentrate Weakening treatment to cross in certain sequence.
Fit on flange 1 in Diffusion Welding frock, lower flange 3, upper flange 1 treat Diffusion Welding surface down, lower flange 3 treat Diffusion Welding surface upward, the diaphragm unit 2 of some is between upper flange 1 and lower flange 3, the inner ring liner 8 of Diffusion Welding device is between spacing inner ring 10 and diaphragm unit 2, and spacing outer shroud 9 is positioned at outside diaphragm unit 2.
Diaphragm unit 2 by four stress concentrate weaken diaphragm 4 and two original specification diaphragms 5 in certain sequence assembly formed, built-up sequence under upper successively: be that the first stress is concentrated and weakened diaphragm (depression is upward), original specification diaphragm 5, the second stress is concentrated and is weakened diaphragm (depression down), the second stress is concentrated and is weakened diaphragm (depression upward), original specification diaphragm 5, the first stress is concentrated and is weakened diaphragm (depression down).
5) enter vacuum drying oven, vacuumize, heat up, pressurization, pressurize, final upper flange 1, lower flange 3 and multiple diaphragm unit 2 complete Diffusion Welding, form multi-layer diaphragm structure bellows blank.
6) stretched multi-layer diaphragm structure bellows blank is to requiring length, puts into equal thickness pad as support between ripple.
7) enter vacuum drying oven, heat up, complete stress relaxation forming process.
8) pickup, carries out machining, and the appearance and size required by final acquisition, as internal diameter, external diameter, hole characteristic etc.
9) rigidity value, hydraulic pressure strength and air tightness test are carried out to multi-layer diaphragm structure bellows.
10) test result qualified after, clear up.
Claims (3)
1. a processing method for multi-layer diaphragm structure bellows, is characterized in that, the method step is as follows:
S1: processing obtains ring film;
S2: at a part of ring film side surface milling ring-shaped depression, form stress and concentrate reduction diaphragm; The ring film not carrying out milling process is called original specification diaphragm;
S3: carve shape treatment step by model and guarantee to spread accurately defining of join domain and non-diffusing join domain;
Treat that Diffusion Welding region and all stress are concentrated weaken diaphragm, original specification diaphragm both sides coating protective coating at upper flange, lower flange;
Make multiple annular model: concentrate with upper flange, lower flange and stress and weaken diaphragm, the internal diameter of each annular model that original specification diaphragm fixes be respectively upper flange, lower flange and stress concentrate weaken diaphragm, place, line of demarcation diameter of a circle that original specification diaphragm treats Diffusion Welding region and non-diffusing welding region, external diameter be respectively to concentrate with upper flange, lower flange and stress weaken diaphragm, original specification diaphragm external diameter identical;
Each annular model is concentrated with upper flange, lower flange and stress respectively and weakens diaphragm, after original specification diaphragm is mounted with, use icking tool scratches protective coating along the internal diameter of model;
Dismantle annular model, remove the protective coating of non-diffusing welding region, afterwards at exposed region coating only solder flux, finally remove remainder protective coating;
S4: assemble lower flange, original specification diaphragm and stress on bellows in certain sequence and concentrate reduction diaphragm, make it in vacuum environment, high temperature, under high pressure, complete diffusion connection procedure and drawing process:
Upper flange treat Diffusion Welding surface down, lower flange treat Diffusion Welding surface upward, the diaphragm unit of some is between upper flange and lower flange, described diaphragm unit by four stress concentrate weaken diaphragm and two original specification diaphragms in certain sequence assembly formed, built-up sequence under upper successively: concentrate for depression stress upward and weaken diaphragm, original specification diaphragm, depression stress down concentrate weaken diaphragm, depression stress is upward concentrated and is weakened diaphragm, original specification diaphragm, depression stress is down concentrated and is weakened diaphragm; And by treating that Diffusion Welding region and non-diffusing welding region are corresponding and unanimously to place between each several part;
S5: again enter vacuum drying oven, at high temperature completes stress relaxation forming process; Finally machining is carried out to bellows semi-finished product, to obtain the bellows meeting dimensional requirement.
2. the Diffusion Welding device of the processing method employing of a kind of multi-layer diaphragm structure bellows according to claim 1, it is characterized in that, the ring-shaped depression degree of depth is 0.1-0.15mm.
3. the Diffusion Welding device of the processing method employing of a kind of multi-layer diaphragm structure bellows according to claim 1, it is characterized in that, Diffusion Welding device diffusion connecting mechanism comprises: upper flange (1), lower flange (3), inner ring liner (8), spacing inner ring (10), spacing outer shroud (9); Fit on flange (1) on Diffusion Welding device, lower flange (3), upper flange (1) treat Diffusion Welding surface down, lower flange (3) treat Diffusion Welding surface upward, the diaphragm unit (2) of some is positioned between upper flange (1) and lower flange (3), inner ring liner (8) is positioned between spacing inner ring (10) and diaphragm unit (2), and spacing outer shroud (9) is positioned at outside diaphragm unit (2).
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| CN201510523843.4A CN105032979B (en) | 2015-08-24 | 2015-08-24 | The processing method and device of a kind of multi-layer diaphragm structure bellows |
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| CN105032979B CN105032979B (en) | 2017-06-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107901438A (en) * | 2017-11-08 | 2018-04-13 | 江苏科瑞斯机件有限公司 | A kind of bellows protective cover processing technology |
| CN110079759A (en) * | 2019-03-11 | 2019-08-02 | 安徽格斯波纹管有限公司 | A kind of metal bellows surface treatment method |
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| GB873194A (en) * | 1960-03-09 | 1961-07-19 | Mullard Ltd | Travelling-wave tube field-straightener assembly |
| US20090008428A1 (en) * | 2005-03-23 | 2009-01-08 | Oskar Akramovich Kaibyshev | Method of manufacturing an article by superplastic forming and diffusion welding |
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| CN101634364A (en) * | 2008-12-29 | 2010-01-27 | 北京智创联合科技有限公司 | Diffusion welding multilayer structure diaphragm capsule |
| CN104339079A (en) * | 2013-08-05 | 2015-02-11 | 刘一丁 | Preparation method of welded bellows |
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2015
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| GB873194A (en) * | 1960-03-09 | 1961-07-19 | Mullard Ltd | Travelling-wave tube field-straightener assembly |
| US20090008428A1 (en) * | 2005-03-23 | 2009-01-08 | Oskar Akramovich Kaibyshev | Method of manufacturing an article by superplastic forming and diffusion welding |
| CN101633075A (en) * | 2008-12-29 | 2010-01-27 | 北京智创联合科技有限公司 | Method for accurate diffusion welding/stop welding of foil plate |
| CN101634381A (en) * | 2008-12-29 | 2010-01-27 | 北京智创联合科技有限公司 | Diffusion welding structure corrugated pipe |
| CN101634380A (en) * | 2008-12-29 | 2010-01-27 | 北京智创联合科技有限公司 | Composite structured corrugated pipe by diffusion welding |
| CN101634364A (en) * | 2008-12-29 | 2010-01-27 | 北京智创联合科技有限公司 | Diffusion welding multilayer structure diaphragm capsule |
| CN104339079A (en) * | 2013-08-05 | 2015-02-11 | 刘一丁 | Preparation method of welded bellows |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107901438A (en) * | 2017-11-08 | 2018-04-13 | 江苏科瑞斯机件有限公司 | A kind of bellows protective cover processing technology |
| CN110079759A (en) * | 2019-03-11 | 2019-08-02 | 安徽格斯波纹管有限公司 | A kind of metal bellows surface treatment method |
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| CN105032979B (en) | 2017-06-20 |
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