CN105032979B - The processing method and device of a kind of multi-layer diaphragm structure bellows - Google Patents
The processing method and device of a kind of multi-layer diaphragm structure bellows Download PDFInfo
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- CN105032979B CN105032979B CN201510523843.4A CN201510523843A CN105032979B CN 105032979 B CN105032979 B CN 105032979B CN 201510523843 A CN201510523843 A CN 201510523843A CN 105032979 B CN105032979 B CN 105032979B
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Abstract
The invention discloses the processing method and device of a kind of multi-layer diaphragm structure bellows, belong to bellows manufacturing technology field, the shortcomings of fatigue life that the method and device are present for the bellows for overcoming conventional method to manufacture and low intensity, compression ratio and geometric accuracy difference；The method step is as follows：S1：Processing obtains ring film；S2：In a part of ring film side surface milling ring-shaped depression, stress concentration reduction diaphragm is formed；S3：Carving shape process step by model ensures that spread join domain defines with the accurate of non-diffusing join domain；S3：Lower flange, original specification diaphragm and stress concentration reduction diaphragm on assembling bellows, complete diffusion connection in certain sequence；The present invention proposes the processing that multi-layer diaphragm structure bellows is realized using Diffusion Welding and stress relaxation combination technological method, stress concentration Weakening treatment method is used simultaneously to eliminate the stress concentration phenomenon produced in the bellows course of work, greatly improves corrugated pipe fatigue life.
Description
Technical field
The invention belongs to bellows manufacturing technology field, it is related to the processing method and dress of a kind of multi-layer diaphragm structure bellows
Put.
Background technology
Conventional bellows is typically manufactured using fusion welding mode after welding after point valve shaping or diaphragm shaping, technique
Flow is complicated, and evenness of wall thickness is difficult to control, and compensation performance and anti-fatigue ability are general.
The content of the invention
Present invention solves the technical problem that being to provide the processing method and device of a kind of multi-layer diaphragm structure bellows, the party
The fatigue life and low intensity, compression ratio and geometric accuracy that method and device are present for the bellows for overcoming conventional method to manufacture are poor
The shortcomings of；The present invention is proposed and realizes multi-layer diaphragm structure bellows using Diffusion Welding and stress relaxation combination technological method
Processing, while use stress concentration Weakening treatment method to eliminate the stress concentration phenomenon produced in the bellows course of work,
Corrugated pipe fatigue life is greatly improved, a kind of device for bellows diaphragm Diffusion Welding is additionally provided.Using the method and
The bellows of device manufacture can be used for the structure compensation of complication system, have damping noise reduction and sealing function concurrently, can apply to
Chemical industry, Aero-Space and energy industry.
The technical scheme is that：A kind of processing method of multi-layer diaphragm structure bellows, comprises the steps：
S1：Processing obtains ring film；
S2：In a part of ring film side surface milling ring-shaped depression, stress concentration reduction diaphragm is formed；Do not changed
The ring film of milling treatment is referred to as original specification diaphragm；
S3：Carving shape process step by model ensures that Diffusion Welding region is defined with the accurate of non-diffusing welding region；
Diffusion Welding region and all stress concentrations reduction diaphragm, original specification diaphragm both sides are treated in upper flange, lower flange
Coating protective coating；
Make various annular models：Mutually fixed with upper flange, lower flange and stress concentration reduction diaphragm, original specification diaphragm
The internal diameter of each annular model be respectively upper flange, lower flange and stress concentration reduction diaphragm, original specification diaphragm and treat diffusion welding (DW)
Region is connect with diameter of a circle where the line of demarcation of non-diffusing welding region, external diameter is respectively and upper flange, lower flange and stress collection
It is middle reduction diaphragm, original specification diaphragm external diameter it is identical；
Each annular model is solid with upper flange, lower flange and stress concentration reduction diaphragm, the assembling of original compliant membrane piece respectively
After fixed, protective coating is scratched along the internal diameter of model using icking tool；
The annular model of dismounting, removes the protective coating of non-diffusing welding region, stops solder flux in exposed region coating afterwards, most
Remainder protective coating is removed afterwards；
S4：Lower flange, original specification diaphragm and stress concentration reduction diaphragm on assembling bellows, make it in certain sequence
In vacuum environment, high temperature under high pressure, completes diffusion connection procedure and drawing process：
Upper flange treats Diffusion Welding surface down, and lower flange treats Diffusion Welding surface upward, a number of diaphragm
Component is located between upper flange and lower flange, and described diaphragm unit weakens diaphragm and two original specifications by four stress concentrations
Diaphragm assembles combination and is formed in certain sequence, built-up sequence under upper successively：For depression upward stress concentration reduction diaphragm,
Original specification diaphragm, stress concentration reduction diaphragm directed downwardly, the depression of being recessed stress concentration reduction diaphragm upward, original compliant membrane
Piece, be recessed stress concentration reduction diaphragm directed downwardly；And Diffusion Welding region and non-diffusing weld zone will be treated between each several part
Domain correspondence is consistent to place；
S5：Enter vacuum drying oven again, stress relaxation forming process is completed at high temperature；Machine finally is carried out to bellows semi-finished product
Tool is processed, and the bellows of size requirement is met to obtain.
Preferably, ring-shaped depression depth is 0.1-0.15mm.
The Diffusion Welding device that a kind of processing method of described multi-layer diaphragm structure bellows is used, it is characterised in that
Diffusion Welding device diffusion connecting mechanism includes：Upper flange, lower flange, inner ring liner, spacing inner ring, spacing outer shroud；In diffusion
Assemble upper flange on welder, lower flange, upper flange treats Diffusion Welding surface down, lower flange treats Diffusion Welding surface
Upward, a number of diaphragm unit is located between upper flange and lower flange, and inner ring liner is located at spacing inner ring and diaphragm unit
Between, spacing outer shroud is located at outside diaphragm unit.
The solution have the advantages that：
Diffusion Welding and the multi-layer diaphragm structure bellows of stress relaxation combination technological method manufacture that the present invention is used, work
Skill is simple, die cost is low, forming accuracy is high, and adjustable using diffusion technology for welding connection area, and weld strength is high, also gram
Take conventional method shaping bellows intensity and fatigue life is low, poor sealing, the shortcomings of be not suitable for large deformation.
Diaphragm after a kind of use stress concentration reduction proposed by the present invention is diffused welding, stress relaxation figuration manufacture
The method and device of multi-layer diaphragm structure bellows, exists larger excellent in terms of process-cycle, production cost and precision performance
Gesture.
1) stress concentration Weakening treatment method is used, corrugated pipe fatigue life is greatly improved.
2) compression ratio is substantially improved, and is conducive to controlling bellows overall dimensions.
3) welding quality using Diffusion Welding device is good, and Diffusion Welding region accurately controls, so as to ensure bellows
Stable performance.
4) the final appearance and size of bellows is by machining guarantee, high precision.
Brief description of the drawings
Fig. 1 a are multi-layer diaphragm structure bellows schematic diagram；
Fig. 1 b are the diaphragm unit enlarged diagram of multi-layer diaphragm structure bellows；
Fig. 2 is ring film stress concentration Weakening treatment schematic diagram；
Fig. 3 is flange, diaphragm assembling schematic diagram；
Fig. 4 is assembling schematic diagram before bellows Diffusion Welding；
1 is upper flange in Fig. 1 a and Fig. 1 b, and 2 is diaphragm unit, and 3 is lower flange, and 4 is that stress concentration weakens diaphragm, and 5 is original
Beginning specification diaphragm, 6 (are referred to and need the region that Diffusion Welding surface is not covered by only solder flux) by Diffusion Welding region in Fig. 3, and 7 are
Non-diffusing welding region (refers to needed Diffusion Welding surface only solder flux overlay area, the region that black lines show in figure), Fig. 4
In 8 be inner ring liner, 9 is spacing outer shroud, and 10 is spacing inner ring, and 11 Diffusion Weldings for needed for connect pressure.
Specific embodiment
The present invention is described in further detail below.
Multi-layer diaphragm structure bellows proposed by the present invention is made up of upper flange 1, lower flange 3 and multiple diaphragm units 2, many
It is adjacent between individual diaphragm unit 2, and between upper flange 1 and lower flange 3.Diaphragm unit 2 is by four stress concentration weakened films
Piece 4 and two original specification diaphragms 5 assemble combination and are formed in certain sequence, and assemble sequence is the stress concentration reduction (depression of diaphragm 4
Upward), original specification diaphragm 5, stress concentration reduction diaphragm 4 (depression is down), stress concentration reduction diaphragm 4 (depression is upward),
Original specification diaphragm 5, stress concentration reduction diaphragm 4 (depression is down).
A kind of processing method of multi-layer diaphragm structure bellows proposed by the present invention, comprises the steps：
1) after patch blanking ring film blank, finishing processing obtains the ring film for meeting size requirement.
2) in the ring-shaped depression of ring film side surface milling depth about 0.1-0.15mm, as the stress of ring film
Weakening treatment is concentrated, to obtain stress concentration reduction effect, stress concentration reduction diaphragm 4 is formed；Original specification diaphragm 5 is not enter
The ring film of row milling treatment.
3) membrane surface is cleared up, goes to degrease.Diffusion Welding region and all stress concentrations are treated in upper flange 1, lower flange 3
Reduction diaphragm 4, the original both sides of specification diaphragm 5 coating protective coating, and (Diffusion Welding region is treated in realization to carry out the shape treatment of model quarter
6 define with the accurate of non-diffusing welding region 7), the annular model of dismounting, the protective coating of removal non-diffusing welding region 7, afterwards
Stop solder flux in exposed region coating, finally remove remainder protective coating.
Model is carved the step of shape is processed:Make various annular models, the internal diameter of each annular model be respectively upper flange 1,
Lower flange 3 and stress concentration reduction diaphragm 4, original specification diaphragm 5 treat that Diffusion Welding region 6 demarcates with non-diffusing welding region 7
Diameter of a circle where line, the external diameter of model and upper flange 1, lower flange 3 and stress concentration reduction diaphragm 4, original specification diaphragm 5
External diameter is identical.Each annular model is filled with upper flange 1, lower flange 3 and stress concentration reduction diaphragm 4, original specification diaphragm 5 respectively
After with fixation, use icking tool along the internal diameter of model scratch protective coating (so that the protective coating of non-diffusing welding region 7 and remaining
Protective coating is separated).Upper flange 1, lower flange 3 are treated Diffusion Welding region 6, the boundary of non-diffusing welding region 7 and are connected
Diffusion Welding region 6 is treated on stress concentration reduction diaphragm 4 surface, and the boundary of non-diffusing welding region 7 is consistent.
Stress concentration reduction diaphragm has two kinds of different boundary for treating Diffusion Welding region 6 and non-diffusing welding region 7.
The first stress concentration weakens diaphragm：The surface of ring-shaped depression, to treat Diffusion Welding region 6 outside ring-shaped depression is cylindrical, remaining
Position is non-diffusing welding region 7；Ringless-type depression surface, inside and outside ring-shaped depression between circular diameter be non-diffusing welding region
7, remaining is to treat Diffusion Welding region 6.Second stress concentration weakens diaphragm：The surface of ring-shaped depression, ring-shaped depression inner circle with
It is interior to treat Diffusion Welding region 6, remaining position be non-diffusing welding region 7；The surface of ringless-type depression, ring-shaped depression inside and outside circle
It is non-diffusing welding region 7 between diameter, remaining is to treat Diffusion Welding region 6.
Original specification diaphragm 5：It is non-diffusing welding region 7 between circular diameter inside and outside ring-shaped depression, remaining is to treat diffusion welding (DW)
Connect region 6.
4) using Diffusion Welding device assembling diaphragm, lower flange, diaphragm and stress on bellows are assembled in certain sequence
The diaphragm for concentrating Weakening treatment to cross.
Upper flange 1 is assembled in Diffusion Welding frock, lower flange 3, upper flange 1 treats Diffusion Welding surface down, laxative remedy
Blue 3 treat Diffusion Welding surface upward, and a number of diaphragm unit 2 is located between upper flange 1 and lower flange 3, Diffusion Welding
The inner ring liner 8 of device is located between spacing inner ring 10 and diaphragm unit 2, and spacing outer shroud 9 is located at outside diaphragm unit 2.
Diaphragm unit 2 weakens diaphragm 4 by four stress concentrations and two original specification diaphragms 5 assemble combination in certain sequence
Formed, built-up sequence under upper successively：It is the first stress concentration reduction diaphragm (depression is upward), original specification diaphragm 5, the
Two kinds of stress concentration reduction diaphragms (depression is down), second stress concentration reduction diaphragm (depression is upward), original specification diaphragm
5, the first stress concentration reduction diaphragm (depression is down).
5) enter vacuum drying oven, vacuumize, heat up, pressurization, pressurize, final upper flange 1, lower flange 3 is complete with multiple diaphragm units 2
Into Diffusion Welding, multi-layer diaphragm structure bellows blank is formed.
6) stretched multi-layer diaphragm structure bellows blank is put into equal thickness pad as branch to length is required between ripple
Support.
7) enter vacuum drying oven, heat up, complete stress relaxation forming process.
8) pickup, is machined, final to obtain required appearance and size, such as internal diameter, external diameter, hole characteristic.
9) rigidity value, hydraulic pressure strength and air tightness test are carried out to multi-layer diaphragm structure bellows.
10) after test result is qualified, cleared up.
Claims (3)
1. a kind of processing method of multi-layer diaphragm structure bellows, it is characterised in that the method step is as follows：
S1：Processing obtains ring film；
S2：In a part of ring film side surface milling ring-shaped depression, stress concentration reduction diaphragm is formed；Do not carry out at milling
The ring film of reason is referred to as original specification diaphragm；
S3：Carving shape process step by model ensures that Diffusion Welding region is defined with the accurate of non-diffusing welding region：
Diffusion Welding region and all stress concentrations reduction diaphragm, the coating of original specification diaphragm both sides are treated in upper flange, lower flange
Protective coating；
Make various annular models：It is each with what upper flange, lower flange and stress concentration reduction diaphragm, original specification diaphragm were mutually fixed
The internal diameter of annular model is respectively upper flange, lower flange and stress concentration reduction diaphragm, original specification diaphragm and treats Diffusion Welding area
Domain and diameter of a circle where the line of demarcation of non-diffusing welding region, external diameter is respectively weak with upper flange, lower flange and stress concentration
Change diaphragm, original specification diaphragm external diameter it is identical；
After each annular model is fixed with upper flange, lower flange and stress concentration reduction diaphragm, the assembling of original compliant membrane piece respectively,
Using icking tool protective coating is scratched along the internal diameter of model；
The annular model of dismounting, removes the protective coating of non-diffusing welding region, stops solder flux in exposed region coating afterwards, finally goes
Except remainder protective coating；
S4：Lower flange, original specification diaphragm and stress concentration reduction diaphragm on assembling bellows, make it true in certain sequence
Altitude, high temperature under high pressure, completes diffusion connection procedure and drawing process：
Upper flange treats Diffusion Welding region surface down, and lower flange treats Diffusion Welding region surface upward, a number of
Diaphragm unit is located between upper flange and lower flange, and described diaphragm unit weakens diaphragm by four stress concentrations and two original
Specification diaphragm assembles combination and is formed in certain sequence, and built-up sequence is followed successively by depression stress concentration weakened film upward from top to bottom
Piece, original specification diaphragm, stress concentration reduction diaphragm directed downwardly, the depression of being recessed stress concentration reduction diaphragm upward, original rule
Lattice diaphragm, be recessed stress concentration reduction diaphragm directed downwardly；And Diffusion Welding region is welded with non-diffusing by treating between each several part
Connect the consistent placement of region correspondence；
S5：Enter vacuum drying oven again, stress relaxation forming process is completed at high temperature；Finally bellows semi-finished product are carried out with machinery to add
Work, the bellows of size requirement is met to obtain.
2. a kind of processing method of multi-layer diaphragm structure bellows according to claim 1, it is characterised in that ring-shaped depression
Depth is 0.1-0.15mm.
3. the Diffusion Welding device that a kind of processing method of multi-layer diaphragm structure bellows according to claim 1 is used,
Characterized in that, Diffusion Welding device includes：It is upper flange (1), lower flange (3), inner ring liner (8), spacing inner ring (10), spacing
Outer shroud (9)；Upper flange (1) is assembled on Diffusion Welding device, lower flange (3), upper flange (1) treats Diffusion Welding surface court
Under, lower flange (3) treats Diffusion Welding surface upward, and a number of diaphragm unit (2) is positioned at upper flange (1) and lower flange
(3) between, between spacing inner ring (10) and diaphragm unit (2), spacing outer shroud (9) is positioned at diaphragm unit for inner ring liner (8)
(2) outside.
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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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| 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 true CN105032979B (en) | 2017-06-20 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107901438B (en) * | 2017-11-08 | 2020-01-24 | 江苏科瑞斯机件有限公司 | Machining process for corrugated pipe protective cover |
| CN110079759B (en) * | 2019-03-11 | 2020-11-27 | 安徽格斯波纹管有限公司 | Surface treatment method for metal corrugated pipe |
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| GB873194A (en) * | 1960-03-09 | 1961-07-19 | Mullard Ltd | Travelling-wave tube field-straightener assembly |
| 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 |
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2291019C2 (en) * | 2005-03-23 | 2007-01-10 | Институт проблем сверхпластичности металлов РАН | Method of manufacture of article by superplastic moulding and diffusion welding |
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2015
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB873194A (en) * | 1960-03-09 | 1961-07-19 | Mullard Ltd | Travelling-wave tube field-straightener assembly |
| 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 |
| 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 |
| 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 |
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