CN107790870A - A kind of friction stir welding method for reducing the abrasion of materials with high melting point stirring-head - Google Patents
A kind of friction stir welding method for reducing the abrasion of materials with high melting point stirring-head Download PDFInfo
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- CN107790870A CN107790870A CN201711219967.9A CN201711219967A CN107790870A CN 107790870 A CN107790870 A CN 107790870A CN 201711219967 A CN201711219967 A CN 201711219967A CN 107790870 A CN107790870 A CN 107790870A
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- mixing needle
- abrasion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
- B23K20/1225—Particular aspects of welding with a non-consumable tool
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- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
A kind of friction stir welding method for reducing the abrasion of materials with high melting point stirring-head, before starting welding, inside mixing needle pumpback to the shaft shoulder, the stirring-head of rotation is pressed into by welding plate material with certain press-in speed at a high speed, reach after specifying pressure depth, stirring-head stays for some time, after materials to be welded fully softens, mixing needle is stretched out inside the shaft shoulder and penetrated inside materials to be welded with certain stretching speed and rotary speed, extension elongation is to subtract 0.1 ~ 0.2mm by weldering sheet metal thickness, after pin extension elongation to be mixed reaches predetermined value, stirring-head is overall to be moved forward with identical rotary speed, complete by the connection of welding plate material, after the completion of welding, stirring-head is integrally extracted from materials to be welded.The welding method is compared with traditional friction stir welding method, first using the shaft shoulder to being preheated by weldering materials with high melting point, stretch out mixing needle again after materials to be welded hot mastication, effectively avoid mixing needle and penetrating the abrasion in stage, extend the service life of stirring-head.
Description
Technical field
The invention belongs to welding field, is related to a kind of agitating friction welding side for reducing the abrasion of materials with high melting point stirring-head
Method.
Background technology
Agitating friction weldering is a kind of new solid phase joining technique, and its principle is that materials to be welded revolves in the high speed of stirring-head
Turn that Plastic Flow, interface under the collective effect of frictional heat and axial compression be broken and a kind of solid diffusivity for being formed.
Compared to traditional melt welding method, agitating friction weldering has that heat input, welding deformation are small, excellent in mechanical performance
The features such as.Low melting material has been widely used in it, such as the welding of Al alloys andMg alloys.And in the welding field of materials with high melting point, by
In materials to be welded fusing point height, hardness is high, flow stress is big, fast under stirring-head heat engine load effect harsh in welding process
Fast wear out failure, thus stirring-head service life it is short limit agitating friction welding technology materials with high melting point welding field should
With.
The content of the invention
Present invention stirring-head serious wear when being directed to materials with high melting point agitating friction weldering, the problem of service life is short, there is provided
A kind of friction stir welding method for reducing the abrasion of materials with high melting point stirring-head.
To reduce the abrasion of stirring-head in materials with high melting point welding process, the present invention is to be achieved through the following technical solutions
's.
A kind of friction stir welding method for reducing the abrasion of materials with high melting point stirring-head, comprises the following steps：
The first step, it will be flushed inside mixing needle pumpback to the shaft shoulder to the end of mixing needle with shaft shoulder endoporus or slightly below in the shaft shoulder
Hole.
Second step, agitating friction soldering equipment to be opened, set main shaft rotary speed, stirring-head is displaced downwardly to materials to be welded surface,
Stirring-head is pressed into by materials to be welded using 0.5mm/min ~ 2mm/min press-in speed, compression distance is 0.1 ~ 0.3mm.
3rd step, after the compression distance for reaching setting, stirring-head stays for some time in the original location, and the residence time is generally
3~30s。
4th, after materials to be welded fully softens, mixing needle is penetrated with 1mm/min ~ 15mm/min press-in speed and welded
Material internal, mixing needle extension elongation is equal to subtracts 0.1 ~ 0.2mm by weldering sheet metal thickness.
5th step, when mixing needle extension elongation reaches designated value, the shaft shoulder moves completion together with mixing needle along interface track
Welding.
6th step, after the completion of welding, if weld seam is non-closed girth joint, the shaft shoulder is synchronous from materials to be welded together with mixing needle
Extract, if weld seam be girth joint, can take mixing needle with the mode for welding progressively pumpback realize girth joint without keyhole agitating friction
Weldering.
A kind of friction stir welding method for reducing the abrasion of materials with high melting point stirring-head provided by the invention, with prior art
Compare, the advantage is that：
First, by way of inside mixing needle pumpback to the shaft shoulder and then being pressed into materials to be welded again, materials to be welded is carried out with the shaft shoulder
Preheating, stretching mixing needle can effectively reduce the mill that stirring-head cold conditions penetrates stage stirring-head after materials to be welded fully softens
Damage, so as to extend the service life of stirring-head.
2nd, after the length abrasion of mixing needle, it can be continuing with by adjusting the extension elongation of mixing needle, meet product
Through welding requirement.
3rd, the friction stir welding method proposed by the present invention for reducing the abrasion of materials with high melting point stirring-head possesses operation letter
Singly, the features such as strong adaptability.
Brief description of the drawings
Fig. 1 is the welding starting stage schematic diagram of the embodiment of the present invention；
Fig. 2 is that the welding of the embodiment of the present invention is pressed into stage schematic diagram；
Fig. 3 is the welding dwell phase schematic diagram of the embodiment of the present invention；
Fig. 4 is that the mixing needle of the embodiment of the present invention stretches out stage schematic diagram；
Fig. 5 is the stable welding stage schematic diagram of the embodiment of the present invention；
Fig. 6 is the welding ending phase schematic diagram of the embodiment of the present invention.
In figure：1 is mixing needle, and 1-1 is the mixing needle of stirring-head, and 1-2 is the shaft shoulder of stirring-head, and 2 be by welding plate material.
Embodiment
Embodiments of the invention are elaborated below：The present embodiment is carried out lower premised on technical solution of the present invention
Implement, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to following implementation
Example.
As shown in Fig. 1 ~ 6, a kind of agitating friction welding for reduction materials with high melting point stirring-head abrasion that the present embodiment provides
Method, comprise the following steps：
The first step, by inside mixing needle 1-1 pumpbacks to shaft shoulder 1-2 to mixing needle 1-1 end it is concordant with shaft shoulder 1-2 endoporus or
Slightly above endoporus.
Second step, agitating friction soldering equipment is opened, set main shaft rotary speed, stirring-head 1 is displaced downwardly to the table of materials to be welded 2
Face, stirring-head 1 is pressed into by materials to be welded 2 using 0.5mm/min ~ 2mm/min press-in speed, compression distance is 0.1 ~ 0.3mm.
3rd step, after the compression distance for reaching setting, stirring-head 1 stays for some time in the original location, and the residence time is general
For 3 ~ 30s.
4th, after the fully softening of materials to be welded 2, mixing needle 1-1 is penetrated with 1mm/min ~ 15mm/min press-in speed
Inside materials to be welded 2, mixing needle 1-1 extension elongations be equal to the thickness of materials to be welded 2-（0.1mm~0.2mm）.
5th step, when mixing needle 1-1 extension elongations reach designated value, shaft shoulder 1-2 is together with mixing needle 1-1 along interface track
It is mobile to complete welding.
6th step, after the completion of welding, if weld seam is non-closed girth joint, shaft shoulder 1-2 is synchronous from being welded together with mixing needle 1-1
Extracted out in material 2, if weld seam is girth joint, mixing needle can be taken to realize being stirred without keyhole for girth joint with the mode for welding progressively pumpback
Mix friction welding (FW).
Specially：
The first step, by inside mixing needle 1-1 pumpbacks to shaft shoulder 1-2 to mixing needle 1-1 end it is concordant with shaft shoulder 1-2 endoporus or
Slightly above endoporus.
Second step, agitating friction soldering equipment is opened, set main shaft rotary speed 400rpm, stirring-head 1 is displaced downwardly to 2mm titanium
The surface of sheet alloy 2, stirring-head 1 is pressed into by titanium alloy plate 2 using 0.5mm/min press-in speed, compression distance is
0.2mm。
3rd step, after the compression distance for reaching setting, the residence time 10s in the original location of stirring-head 1.
4th, after the fully softening of titanium alloy plate 2, mixing needle 1-1 penetrates titanium alloy 2 with 10mm/min press-in speed
Inside, mixing needle 1-1 extension elongations are 1.8mm.
5th step, when mixing needle 1-1 extension elongations reach 1.8mm, shaft shoulder 1-2 is together with mixing needle 1-1 along with 100mm/min
Speed of welding along interface move completion welding.
6th step, after the completion of welding, shaft shoulder 1-2 extracts together with mixing needle 1-1 is synchronous from titanium alloy plate 2.
Welded using the above method, cold conditions penetrates the abrasion of stage stirring-head when the materials with high melting point of reduction welds
Amount, improve the service life of stirring-head.
Claims (6)
1. a kind of friction stir welding method for reducing the abrasion of materials with high melting point stirring-head, it is characterised in that comprise the following steps：
The first step, to being flushed with shaft shoulder endoporus or slightly above shaft shoulder endoporus inside mixing needle pumpback to the shaft shoulder before starting to weld；
Second step, the shaft shoulder rotate with mixing needle Integral synchronous and are pressed into materials to be welded with certain press-in speed；
3rd step, stirring-head reaches specify pressure depth after, stirring-head stays for some time penetrating position；
4th step, after materials to be welded fully softens, mixing needle is stretched out inside the shaft shoulder and penetrated by wlding with certain speed
Material is internal；
5th step, after mixing needle extension elongation reaches predetermined value, stirring-head is welded along welding direction；
6th step, after the completion of welding the shaft shoulder together with mixing needle synchronously lifted from materials to be welded or mixing needle progressively nothing is realized in pumpback
Keyhole welds.
2. a kind of friction stir welding method for reducing the abrasion of materials with high melting point stirring-head as claimed in claim 1, it is special
Sign is that described welding method can be used for the welding of titanium alloy, stainless steel, copper alloy.
3. a kind of friction stir welding method for reducing the abrasion of materials with high melting point stirring-head as claimed in claim 1, it is special
Sign is, in the second step, the shaft shoulder is 0.5mm/min ~ 2mm/min together with the speed of the press-in materials to be welded of mixing needle, is stirred
The compression distance for mixing head is 0.1mm ~ 0.3mm.
4. a kind of friction stir welding method for reducing the abrasion of materials with high melting point stirring-head as claimed in claim 1, it is special
Sign is, in the 3rd step, stirring-head original position residence time is 3 ~ 30s.
5. a kind of friction stir welding method for reducing the abrasion of materials with high melting point stirring-head as claimed in claim 1, it is special
Sign is, in the 4th step, the speed that penetrates of mixing needle is 1mm/min ~ 15mm/min.
6. a kind of friction stir welding method for reducing the abrasion of materials with high melting point stirring-head as claimed in claim 1, it is special
Sign is, in the 5th step, the extension elongation of mixing needle is equal to subtracts 0.1 ~ 0.2mm by weldering sheet metal thickness.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711219967.9A CN107790870B (en) | 2017-11-29 | 2017-11-29 | A kind of friction stir welding method reducing the abrasion of materials with high melting point stirring-head |
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| CN201711219967.9A CN107790870B (en) | 2017-11-29 | 2017-11-29 | A kind of friction stir welding method reducing the abrasion of materials with high melting point stirring-head |
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| CN107790870B CN107790870B (en) | 2019-07-16 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110856884A (en) * | 2018-08-24 | 2020-03-03 | 无锡雅斯格精密机械有限公司 | Friction welding process |
| CN111531267A (en) * | 2020-05-26 | 2020-08-14 | 上海航天设备制造总厂有限公司 | Circular seam keyhole-free double-shaft-shoulder friction stir welding method |
| CN112368102A (en) * | 2018-06-06 | 2021-02-12 | 国立大学法人大阪大学 | Friction stir welding tool and friction stir welding method |
| CN114273770A (en) * | 2022-01-10 | 2022-04-05 | 上海工程技术大学 | Closed needle-free friction stir spot welding device and method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111633321A (en) * | 2020-06-10 | 2020-09-08 | 上海航天设备制造总厂有限公司 | Friction stir welding method for dissimilar metal butt joint |
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| JP2000343243A (en) * | 1999-06-03 | 2000-12-12 | Showa Alum Corp | Tool for friction-stir welding |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112368102A (en) * | 2018-06-06 | 2021-02-12 | 国立大学法人大阪大学 | Friction stir welding tool and friction stir welding method |
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| CN111531267A (en) * | 2020-05-26 | 2020-08-14 | 上海航天设备制造总厂有限公司 | Circular seam keyhole-free double-shaft-shoulder friction stir welding method |
| CN114273770A (en) * | 2022-01-10 | 2022-04-05 | 上海工程技术大学 | Closed needle-free friction stir spot welding device and method |
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| CN107790870B (en) | 2019-07-16 |
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