CN103020330B - pressure welding pressure distribution method - Google Patents
pressure welding pressure distribution method Download PDFInfo
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- CN103020330B CN103020330B CN201110289831.1A CN201110289831A CN103020330B CN 103020330 B CN103020330 B CN 103020330B CN 201110289831 A CN201110289831 A CN 201110289831A CN 103020330 B CN103020330 B CN 103020330B
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- frock
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- 238000003466 welding Methods 0.000 title claims abstract description 25
- 230000005540 biological transmission Effects 0.000 claims abstract description 9
- 238000006073 displacement reaction Methods 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 8
- 238000004458 analytical method Methods 0.000 claims abstract description 6
- 238000004088 simulation Methods 0.000 claims abstract description 5
- 238000010521 absorption reaction Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims abstract 2
- 238000009792 diffusion process Methods 0.000 claims description 11
- 239000000945 filler Substances 0.000 claims description 7
- CSCPPACGZOOCGX-UHFFFAOYSA-N acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 claims description 3
- 230000000875 corresponding Effects 0.000 claims description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 2
- 230000014759 maintenance of location Effects 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 238000005192 partition Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 4
- 239000002689 soil Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
Abstract
The invention discloses a kind of Pressure Welding pressure distribution method, comprise the steps:, according to soil part structure, to draw two-dimensional workpiece and combination stereogram；Set up geometric model, utilize some characteristic that model is simplified；Material behavior analysis and boundary condition determine；Analyze the indexs such as contact condition, contact stress and workpiece displacement；According to analysis result, use the method for engineer testing to compare, thus optimize boundary condition further and arrange and validity of simulation；By changing frock and some contact site area whole pressure state of people's ditty of workpiece, carry out simulation analysis, it is thus achieved that the optimal stress of workpiece, determine frock state.Present invention is mainly applied to the workpiece Pressure Welding connection procedure of two or more complexity, thin-wall construction uses, it it is a kind of pressure distribution method improving pressure transmission effectiveness, during can avoiding pressure transmission, certain workpiece produces bigger local deformation, even local buckling, increase absorption surface effect, it is ensured that workpiece welding quality.
Description
Technical field
The present invention relates to a kind of pressure distribution method in complex part Pressure Welding field.
Background technology
Along with the development of spacemarching, light weight, structure are little, response is medium and small soon
The developing direction of liquid engine.For reducing product weight and improving response speed, at electromotor
Field uses laminate/direct current combination type ejector filler in a large number, and such ejector filler is by flange, rebound
Using diffusion welding (DW) mode to be formed by connecting with spray core body, above Workpiece structure is sufficiently complex, mostly is
Irregular flute profile loose structure, and be thin-wall part.Due to by the rigidity of workpiece self and work
The part way of contact and the impact of position, after causing diffusion welding (DW), workpiece junction weldquality difference is relatively
Greatly, some position weld strength the most just leaks, and great quality the most repeatedly occurs
Problem.
For ensureing the effectiveness that pressure transmits at complicated, thin-wall construction workpiece, by adjusting workpiece
The method of each site pressure controls pressure transmission, it is ensured that each position stress of workpiece is controlled,
Fall stress concentration, it is to avoid workpiece local buckling, improves workpiece welding quality.
Currently without explanation or the report of discovery technology similar to the present invention, the most not yet collect state
Inside and outside similar data.
Summary of the invention
For solving because of complicated, the effectiveness of thin-wall construction workpiece pressure transmission, and cause diffusion welding (DW)
Problem that weld seam low-pressure is gone here and there mutually and weldquality differs greatly.By adjusting frock and each portion of workpiece
The method of position effectively contact area controls pressure transmission, it is ensured that each position stress of workpiece
Controlled, stress concentration drops, it is to avoid workpiece local buckling, it is ensured that workpiece each position weldquality
Uniformity, improves workpiece welding quality.
In order to reach the purpose of foregoing invention, the present invention solves the skill that its technical problem is used
Art scheme is to propose a kind of workpiece Pressure Welding pressure distribution method, and this invention comprises the following steps.
Step 1, according to Workpiece structure, drawing three-dimensional workpiece and combination stereogram.
Step 2, sets up geometric model, utilizes some characteristic to be simplified model.
Step 3: material behavior analysis and boundary condition determine, specifies material behavior and determines diffusion welding (DW)
Temperature (0.5～0.85Tm, Tm: for mother metal fusing point), pressure (0.1～20MPa), temperature retention time
(10～240min), surface light state (surface carries out oil removal treatment, and by acetone or wipes of alcohol
Wipe) and vacuum (10-1Pa～10-4Pa)；
Step 4: use corresponding analysis software to obtain and characterize pressure transmission, deformation of products and STRESS VARIATION
Contact distribution, distribution of contact, axial displacement cloud atlas, big misalignment；Radial displacement cloud
The data such as figure, and determine Max.contact stress, minimal-contact stress and maximum displacement situation；
Step 5: use the method for engineer testing to workpiece critical size (thickness, diameter before and after diffusion welding (DW)
Circularity etc.) deformation measure, and with analog simulation result of calculation contrast, optimize mould further
Type and boundary condition；
Step 6: adjust pressure state by changing some contact site size of frock and workpiece, obtain
Obtaining the optimal stress of workpiece, as at work minimum stress position, increase frock connects with workpiece
Contacting surface is amassed, and improves the contact condition of surface of the work；For another example at work maximum stress position, reduce
Frock and the contact area of workpiece, reduce Max.contact stress value, prevent workpiece from deforming.
Relative to prior art, present invention can ensure that pressure passes at complicated, thin-wall construction workpiece
Stress concentration, drops in the effectiveness passed, it is ensured that each position stress of workpiece is controlled, improves
Workpiece welding quality.The present invention can be widely applied to all kinds of pressure transmission being used in Pressure Welding
Field.
Accompanying drawing explanation
Fig. 1 is the workpiece 3 dimensional drawing using ProE to draw；
Fig. 2 is the structural representation of ejector filler；
Fig. 3 is the structure sectional view of tradition frock；
Fig. 4 is that the structure improving frock cuts open bodyguard figure.
Detailed description of the invention
Below in conjunction with embodiment, invention is described further.
The problem differed greatly for workpiece junction weldquality after solving diffusion welding (DW), analyzes spray
The former of leakage is just there is under note device (its workpiece is complexity, thin-walled, loose structure) low-pressure
Because being that diffusion welding (DW) pressure can not effectively transmit, cause workpiece local buckling, cause the weldering of workpiece local
Seam intensity wretched insufficiency.
Following example of the present invention are reduced by change or forbid frock and some contact site of workpiece
Plane amasss, and improves effectiveness and reasonability that pressure transmits between each workpiece, it is ensured that workpiece is each
Individual position stress is controlled, drops stress concentration, improves workpiece welding quality.
The tool of the pressure distribution method of the complex part Pressure Welding that the preferred embodiment of the present invention provides
Body step includes
Step 1, according to ejector filler structural requirement, this ejector filler is used ProE to draw workpiece by flange
And combination stereogram, see Fig. 1, Fig. 2.
Step 2, sets up geometric model, utilizes some characteristic to be simplified model.Here lead
It should be noted that absorption surface situation and confined state thereof.
Step 3, material behavior analysis and boundary condition determine, owing to ejector filler workpiece employs two
Plant material, therefore want clear and definite material behavior, and when determining the temperature of diffusion welding (DW), pressure, insulation
Between, a series of boundary conditions such as surface light state and vacuum.
Step 4, uses dedicated analysis software to characterizing pressure transmission, deformation of products and STRESS VARIATION
The index such as contact condition, contact stress and workpiece displacement be analyzed.
Step 5, uses the method for engineer testing to carry out workpiece critical size deformation before and after diffusion welding (DW)
Measure, and contrast with analog simulation result of calculation, further Optimized model and boundary condition.
Step 6, adjusts pressure state by changing some contact site size of frock and workpiece,
It is specifically shown in Fig. 3, Fig. 4, it is thus achieved that the optimal stress of workpiece.
Claims (1)
1. a Pressure Welding pressure distribution method, is characterized in that, comprises the steps:
Step 1: according to ejector filler structural requirement, uses ProE to draw workpiece and combination stereogram；
Step 2: utilize software that model partition grid is obtained FEM (finite element) model, utilizes absorption surface situation and confined state thereof that number of grid carries out simplification process:
Step 3: material behavior analysis and boundary condition determine, specify material behavior and determine that the temperature of diffusion welding (DW) is 0.5～0.85Tm, Tm is mother metal fusing point, pressure is 0.1～20MPa, temperature retention time is 10～240min, surface light state is that surface carries out oil removal treatment, and is 10 by acetone or alcohol wipe and vacuum-1Pa～10-4Pa；
Step 4: use corresponding analysis software to obtain and characterize pressure transmission, deformation of products and the contact distribution of STRESS VARIATION, distribution of contact, axial displacement cloud atlas, big misalignment；Radial displacement cloud atlas data, and determine Max.contact stress, minimal-contact stress and maximum displacement situation；
Step 5: use the method for engineer testing that workpiece critical size deformation before and after diffusion welding (DW) is measured, and contrast with analog simulation result of calculation, further Optimized model and boundary condition；
Step 6: adjust pressure state by changing some contact site size of frock and workpiece, it is thus achieved that the optimal stress of workpiece, at work minimum stress position, increase the contact area of frock and workpiece, improve the contact condition of surface of the work；At work maximum stress position, reduce the contact area of frock and workpiece, reduce Max.contact stress value, prevent workpiece from deforming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110289831.1A CN103020330B (en) | 2011-09-27 | pressure welding pressure distribution method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110289831.1A CN103020330B (en) | 2011-09-27 | pressure welding pressure distribution method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103020330A CN103020330A (en) | 2013-04-03 |
| CN103020330B true CN103020330B (en) | 2016-11-30 |
Family
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04118187A (en) * | 1990-09-04 | 1992-04-20 | Chiyoda Corp | Production of piping formed by using friction press welding |
| CN101089859A (en) * | 2007-07-20 | 2007-12-19 | 哈尔滨工业大学 | Finite element analysing system for virtual manufacturing welding structure under environment |
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04118187A (en) * | 1990-09-04 | 1992-04-20 | Chiyoda Corp | Production of piping formed by using friction press welding |
| CN101089859A (en) * | 2007-07-20 | 2007-12-19 | 哈尔滨工业大学 | Finite element analysing system for virtual manufacturing welding structure under environment |
Non-Patent Citations (2)
| Title |
|---|
| 基于ANSYS的焊接过程有限元模拟;刘兴龙等;《电焊机》;20070731;第37卷(第7期);第41-44页 * |
| 超塑成形/扩散焊接组合工艺数值模拟初探;李靖谊等;《南京航空航天大学学报》;19990630;第31卷(第3期);第324-329页 * |
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Legal Events
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Tian Yingchao Inventor after: Xie Ronghua Inventor after: Bao Haitao Inventor after: Wang Mingdi Inventor after: Zhuang Jie Inventor after: Wang Lei Inventor after: Zhou Jie Inventor before: Tian Yingchao Inventor before: Xie Ronghua Inventor before: Bao Haitao |