CN107971627B - The adaptive self-supporting Friction Stir Welding device of aluminium alloy thick plate and its welding method - Google Patents
The adaptive self-supporting Friction Stir Welding device of aluminium alloy thick plate and its welding method Download PDFInfo
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- CN107971627B CN107971627B CN201711265462.6A CN201711265462A CN107971627B CN 107971627 B CN107971627 B CN 107971627B CN 201711265462 A CN201711265462 A CN 201711265462A CN 107971627 B CN107971627 B CN 107971627B
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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
- B23K20/1245—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 characterised by the apparatus
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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
- B23K20/24—Preliminary treatment
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Abstract
A kind of adaptive self-supporting Friction Stir Welding device of aluminium alloy thick plate, including self-reacting device, stirring-head, restraint device.Stirring-head top is connect by fastening screw with self-reacting device, and stirring-head lower part is connect by bearing with restraint device.It based on the welding method of above-mentioned welder, the steps include: the first step, opened in weldment abutment joint center one end and take U-shaped notch, and welding clamping is fixed；Second, erecting and welding stirring tool；Stirring-head and the U-shaped notch centering of weldment are chosen suitable welding parameter and are welded by third step.The device and welding method are able to solve root of weld defect during the weldering of aluminium alloy thick plate agitating friction, the speed of welding and double-shaft shoulder stirring-head service life of the weldering of aluminium alloy thick plate double-shaft shoulder agitating friction are improved, while greatly reducing requirement of the double-shaft shoulder agitating friction weldering to welding flatness.
Description
Technical field
The present invention designs welding field, the adaptive self-supporting Friction Stir Welding device of specially a kind of aluminium alloy thick plate and
Its welding method.
Background technique
Agitating friction weldering is Britain's institute of welding in a kind of novel solid phase joining technique of invention in 1991, has manufacture
It is at low cost, quality of connection is high, many advantages such as pollution-free, the appearance of this technology, for aluminum alloy piping welding provide one it is new
Technological approaches, currently, agitating friction welding technology has been widely used in automobile, ship, aerospace field.
With welded enlargement, the welded application of thick aluminum alloy plate is more and more extensive, and uniaxial shoulder stirring rubs
Weldering is wiped to thick plates, welding temperature gradient is big, and weld metal zone tissue morphology and performance difference are bigger, root of weld welding effect
It is bad, easily there is the defects of lack of penetration and kiss connects；Although and the weldering of conventional fixed-type double-shaft shoulder agitating friction can make up uniaxial shoulder and stir
The deficiency of friction welding technology is mixed, but stirring-head axial stiffness is fixed, for the bad adaptability of surface irregularity workpiece, is easy to produce
Overlap, weld seam cross the welding defects such as sub-cut is thin, and the Feasible degree of practical implementation is not high, and the weldering stirring of double-shaft shoulder agitating friction
Tool is fixedly connected with host header knife handle, and head vibration can be impacted and then have an adverse effect to double-shaft shoulder stirring-head, especially
Thick plates, load is big, and vibration is strong, and stirring-head service life is low.At present often using uniaxial shoulder welding by both sides in industrial production
Method is connect, however two-sided welding expends the period and promotes one times, seriously limits agitating friction welding technology production efficiency, limits and stir
Mix the further development of friction welding technology.
Summary of the invention
The present invention is directed to the Friction Stir Welding problem of aluminium alloy thick plate, provides a kind of aluminium alloy thick plate adaptively from propping up
Support Friction Stir Welding device and its welding method.
It is achieved through the following technical solutions when of the invention, a kind of adaptive self-supporting Friction Stir Welding of aluminium alloy thick plate
Device, including splined shaft, splined sleeve, double-shaft shoulder stirring-head, restraint device, splined shaft with offer is provided with friction stir welding machine
Driving force is connected between splined shaft and splined sleeve by spline fitted, and splined sleeve lower end is equipped with internal screw thread, double-shaft shoulder stirring
Head top is equipped with external screw thread, and splined sleeve is connected through a screw thread with double-shaft shoulder stirring-head, double-shaft shoulder stirring-head lower part with about get one's things ready
It sets and is connected by bearing, restraint device radially constrains the shaft shoulder under stirring-head, and weldment is located at the upper and lower axis of double-shaft shoulder stirring-head
Welding is completed between shoulder.
Preferably, splined shaft surface is equipped with external splines, splined sleeve inner surface is equipped with internal spline, and spline is involute flower
Key, spline connection are gap-matched.
Preferably, splined sleeve lower part machining internal thread, double-shaft shoulder stirring-head top threading, screw thread is closely-pitched
Screw thread, it is opposite with stirring-head direction of rotation in welding process that screw thread screws direction.
Preferably, the shaft shoulder and bearing are interference fitted under double-shaft shoulder stirring-head, restraint device and bearing clearance cooperate.
Told weldment is aluminium alloy thick plate, and plate thickness is more than or equal to 20mm.
Told splined shaft, splined sleeve, double-shaft shoulder stirring-head, restraint device are arranged concentrically.
Further, it in welding process, is free to move axially between splined shaft and splined sleeve, double-shaft shoulder stirring-head and constraint
Device is free to move axially.
Another technical solution of the invention is, provides based on the adaptive self-supporting agitating friction of above-mentioned aluminium alloy thick plate
The welding method of welder, comprising the following steps:
U-shaped notch processing: the first step processes U-shaped notch, U-shaped notch center line and weldering in weldment abutment joint center one end
It stitches center line to be overlapped, weldment clamping is fixed；
Second, welder installation: splined shaft is connect with welding machine host header, and splined sleeve and active axis connection are stirred
It mixes head to connect with splined sleeve and restraint device, adjusts stirring-head position, guarantee that stirring-head has removable gap up and down；
Third step, welding: the position between adjustment weldment and stirring-head guarantees U-shaped notch and the stirring-head centering of weldment,
Suitable parameter is chosen to be welded.
Preferably, U-shaped gap width is equivalent to mixing needle diameter, U-shaped notch length is equivalent to stirring-head shaft shoulder diameter.
Preferably, the contact length of splined shaft and splined sleeve should be not less than the 2/3 of spline overall length in welding process.
A kind of adaptive self-supporting Friction Stir Welding device of aluminium alloy thick plate provided by the invention and its welding method, with
The prior art is compared, and has following effective effect:
1. the present invention breaches the mentality of designing of previous stirring-head, during thick plates, increase to the lower shaft shoulder
Radial constraint effectively avoids series of malpractice brought by stirring-head partial twist；
Guarantee in such a way that involute spline connects 2. the present invention relieves the problem of stirring-head axial movement first
The centering precision of stirring tool, while transmitting power can improve the adaptation of butt-welding fitting flatness again with free floating
Ability refers to the service life of stirring-head significantly.
3. the present invention not only has both the technical characterstic of double-shaft shoulder agitating friction weldering, there are the distinct advantage with itself, structure
Simply, applicability is extremely strong.
Detailed description of the invention
Fig. 1 is the adaptive self-supporting Friction Stir Welding apparatus structure schematic diagram of aluminium alloy thick plate of the invention.
Fig. 2 splined shaft and splined sleeve connection schematic diagram.
Fig. 3 is stirring-head and weldment schematic diagram.
Specific embodiment
The specific embodiment that the present invention will now be explained with reference to the accompanying drawings.
As shown in Figure 1,1 is splined shaft, and 2 be splined sleeve, and 3 be double-shaft shoulder stirring-head, and 4 be weldment, and 5 be constraint in figure
Device, a kind of adaptive self-supporting Friction Stir Welding device of aluminium alloy thick plate, including splined shaft 1, splined sleeve 2, double-shaft shoulder
Stirring-head 3, restraint device 5, it is characterized in that: splined shaft 1 is connect with friction stir welding machine provides driving force, splined shaft 1 and flower
It is connected between key sleeve 2 by spline fitted, 2 lower end of splined sleeve is equipped with internal screw thread, and 3 top of double-shaft shoulder stirring-head is equipped with outer spiral shell
Line, splined sleeve 2 are connected through a screw thread with double-shaft shoulder stirring-head 3, and 3 lower part of double-shaft shoulder stirring-head and restraint device 5 pass through bearing
It connects, in welding process, is free to move axially between splined shaft 1 and splined sleeve 2, double-shaft shoulder stirring-head 3 and 5 axis of restraint device
To moving freely, restraint device 5 radially constrains the lower shaft shoulder of double-shaft shoulder stirring-head 3, and weldment 4 is located at double-shaft shoulder stirring-head 3
Welding is completed between the upper and lower shaft shoulder.
As shown in Fig. 2, 1 surface of splined shaft is equipped with external splines, 2 inner surface of splined sleeve is equipped with internal spline, and spline is gradually to open
Line spline, spline connection are gap-matched.The fit system of involute spline ensure that the centering precision of stirring tool,
It axially free can float again while transmitting power, improve the adaptability of butt-welding fitting flatness, refer to stir significantly
The service life of head.
2 lower part machining internal thread of splined sleeve, 3 top threading of double-shaft shoulder stirring-head, screw thread is fine thread, spiral shell
It is opposite with 3 direction of rotation of stirring-head in welding process that line screws direction.
The lower shaft shoulder of double-shaft shoulder stirring-head 3 and bearing are interference fitted, and restraint device 5 and bearing clearance cooperate.
Weldment 4 is aluminium alloy thick plate, and plate thickness is more than or equal to 20mm.
Splined shaft 1, splined sleeve 2, double-shaft shoulder stirring-head 3, restraint device 5 are arranged concentrically.
A kind of adaptive self-supporting friction stir welding method of aluminium alloy thick plate, comprising the following steps:
U-shaped notch processing: the first step processes U-shaped notch, U-shaped notch center line and weldering in 4 abutment joint center one end of weldment
It stitches center line and is overlapped (shown in Fig. 3), 4 clamping of weldment is fixed；
Second, welder installation: splined shaft 1 is connect with welding machine host header, splined sleeve 2 and 1 axis connection of spline,
Stirring-head 3 is connect with splined sleeve 2 and restraint device 5, adjusts 3 position of double-shaft shoulder stirring-head, guarantees about 3 double-shaft shoulder stirring-head
There is removable gap；
Third step, welding: the position between adjustment weldment 4 and double-shaft shoulder stirring-head 3 guarantees the U-shaped notch of weldment 4 and double
3 centering of shaft shoulder stirring-head (shown in Fig. 3) is chosen suitable parameter and is welded.
U-shaped gap width is equivalent to 3 needle diameter of double-shaft shoulder stirring-head, and U-shaped notch length is equivalent to 3 shaft shoulder of double-shaft shoulder stirring-head
Diameter.
In welding process, the contact length of splined shaft 1 and splined sleeve 2 should be not less than the 2/3 of spline overall length.
Claims (5)
1. a kind of adaptive self-supporting Friction Stir Welding device of aluminium alloy thick plate, including splined shaft, splined sleeve, double-shaft shoulder are stirred
Mix head, restraint device, it is characterised in that:
The splined shaft is connect with friction stir welding machine provides driving force, is connected between splined shaft and splined sleeve by spline fitted
It connects, splined sleeve lower end is equipped with internal screw thread；
Double-shaft shoulder stirring-head top is equipped with external screw thread, and splined sleeve is connected through a screw thread with double-shaft shoulder stirring-head, double-shaft shoulder
Stirring-head lower part is connect with restraint device by bearing；
The restraint device radially constrains the shaft shoulder under stirring-head, and weldment is located between the upper and lower shaft shoulder of double-shaft shoulder stirring-head
Complete welding；
The splined shaft surface is equipped with external splines, and splined sleeve inner surface is equipped with internal spline, and spline is involute spline, and spline connects
It connects and is gap-matched；
Splined sleeve lower part machining internal thread, double-shaft shoulder stirring-head top threading, screw thread is fine thread, screw thread
It is opposite with stirring-head direction of rotation in welding process to screw direction；
The shaft shoulder and bearing are interference fitted under the double-shaft shoulder stirring-head, and restraint device and bearing clearance cooperate；
The splined shaft, splined sleeve, double-shaft shoulder stirring-head, restraint device are arranged concentrically；
It is free to move axially between the splined shaft and splined sleeve, double-shaft shoulder stirring-head is free to move axially with restraint device.
2. the adaptive self-supporting Friction Stir Welding device of a kind of aluminium alloy thick plate according to claim 1, it is characterised in that:
Weldment is aluminium alloy thick plate, plate thickness >=20mm.
3. the welding method of the adaptive self-supporting Friction Stir Welding device of a kind of aluminium alloy thick plate according to claim 1,
It is characterized by comprising following steps:
1) U-shaped notch, U-shaped notch center line and axis of a weld weight U-shaped notch processing: are processed in weldment abutment joint center one end
It closes, weldment clamping is fixed；
2) welder is installed: splined shaft being connect with welding machine host header, splined sleeve and active axis connection, stirring-head and spline
Sleeve and restraint device connection, adjust stirring-head position, guarantee that stirring-head has removable gap up and down；
3) weld: the position between adjustment weldment and stirring-head guarantees U-shaped notch and the stirring-head centering of weldment, and it is suitable to choose
Parameter welded.
4. the adaptive self-supporting friction stir welding method of a kind of aluminium alloy thick plate according to claim 3, it is characterised in that:
U-shaped gap width is equivalent to mixing needle diameter, and U-shaped notch length is equivalent to stirring-head shaft shoulder diameter.
5. the adaptive self-supporting friction stir welding method of a kind of aluminium alloy thick plate according to claim 3, it is characterised in that:
In welding process, the contact length of splined shaft and splined sleeve answered >=spline overall length 2/3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711265462.6A CN107971627B (en) | 2017-12-05 | 2017-12-05 | The adaptive self-supporting Friction Stir Welding device of aluminium alloy thick plate and its welding method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711265462.6A CN107971627B (en) | 2017-12-05 | 2017-12-05 | The adaptive self-supporting Friction Stir Welding device of aluminium alloy thick plate and its welding method |
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| CN107971627A CN107971627A (en) | 2018-05-01 |
| CN107971627B true CN107971627B (en) | 2019-07-16 |
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| CN108568590B (en) * | 2018-06-28 | 2020-05-19 | 航天工程装备（苏州）有限公司 | Static shaft shoulder with self-supporting structure for friction stir welding and welding method |
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| CN102501074A (en) * | 2011-10-12 | 2012-06-20 | 罗键 | Cutting-stirring friction-welding combined machining equipment and manufacturing method thereof |
| CN102794558A (en) * | 2011-05-27 | 2012-11-28 | 三菱重工业株式会社 | Friction stir welding tool and friction stir welding apparatus |
| CN203778960U (en) * | 2014-03-18 | 2014-08-20 | 上海拓璞数控科技有限公司 | Dual-shaft-shoulder stirring head for friction-stir welding |
| CN204621349U (en) * | 2014-05-30 | 2015-09-09 | 北京赛福斯特技术有限公司 | A kind of floating double-axis shoulder friction stir welding tool |
| CN105171230A (en) * | 2015-09-30 | 2015-12-23 | 张立华 | Double-shaft-shoulder stirring head with automatically-adjusted clearance |
| CN205200794U (en) * | 2015-08-19 | 2016-05-04 | 长春工业大学 | Stirring head of biax shoulder for friction stir welding |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013043914A1 (en) * | 2011-09-20 | 2013-03-28 | David Rosal | Material surface modification using friction stir welding hybrid process |
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- 2017-12-05 CN CN201711265462.6A patent/CN107971627B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102794558A (en) * | 2011-05-27 | 2012-11-28 | 三菱重工业株式会社 | Friction stir welding tool and friction stir welding apparatus |
| CN102501074A (en) * | 2011-10-12 | 2012-06-20 | 罗键 | Cutting-stirring friction-welding combined machining equipment and manufacturing method thereof |
| CN203778960U (en) * | 2014-03-18 | 2014-08-20 | 上海拓璞数控科技有限公司 | Dual-shaft-shoulder stirring head for friction-stir welding |
| CN204621349U (en) * | 2014-05-30 | 2015-09-09 | 北京赛福斯特技术有限公司 | A kind of floating double-axis shoulder friction stir welding tool |
| CN205200794U (en) * | 2015-08-19 | 2016-05-04 | 长春工业大学 | Stirring head of biax shoulder for friction stir welding |
| CN105171230A (en) * | 2015-09-30 | 2015-12-23 | 张立华 | Double-shaft-shoulder stirring head with automatically-adjusted clearance |
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