CN201102125Y - Agitator head for agitating friction welding - Google Patents
Agitator head for agitating friction welding Download PDFInfo
- Publication number
- CN201102125Y CN201102125Y CNU2007200425628U CN200720042562U CN201102125Y CN 201102125 Y CN201102125 Y CN 201102125Y CN U2007200425628 U CNU2007200425628 U CN U2007200425628U CN 200720042562 U CN200720042562 U CN 200720042562U CN 201102125 Y CN201102125 Y CN 201102125Y
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- stirring
- head
- friction stir
- stir welding
- mixing needle
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Abstract
The utility model relates to a stirring head for the friction stir welding of a double-layer aluminium alloy material, which comprises a rear cylindrical connector, a middle cylinder and a front stirring needle; the middle cylinder is provided with a spiral heat-dissipating groove; the stirring needle at the front of the stirring head is in the shape of a cone, the surface of which is provided with spiral grooves; a shaft shoulder at the joint between the end of the middle cylinder and the bottom of the stirring needle is in the shape of a concave conical surface, at least three spiral grooves are evenly distributed on the conical surface of the stirring needle, and the tip of the stirring needle is provided with a hemispherical socket. The spiral grooves on the stirring needle are intersected with the hemispherical socket, and three notches are formed on the edge of the hemispherical socket on the tip of the conical stirring needle. The friction stir welding tool with the structure enhances the plastic flow of metal during friction stir welding, thus resolving the problem that the heat of the lower plate of a double-layer plate is insufficient and uneven due to the poor heat conduction of the double-layer plate.
Description
Technical field
The utility model relates to a kind of soldering set, and especially the soldering set of using as double-layer aluminium alloy sheet material friction stir welding belongs to material interconnection technique field.
Background technology
Friction stir welding (FSW) is a kind of new type low temperature solid phase interconnection technique, is applicable to the low-melting alloy welding.Be 1991 by Britain's institute of welding (The Welding Institute, TWI) Fa Ming (US5460317), the principle of this technology is to utilize the stirring-head of rotation at a high speed to insert in the seam, utilize the strong friction and the stirring action of stirring-head, make the solder joint district be in the thermoplasticity state and be broken, mix, be joined together under certain pressure effect, stirring-head rotates at a high speed and pushes towards welding direction, rear at stirring-head has then formed weld seam, thereby has finished solid-state connection.Each state is all in competitively research and development, in field extensive application such as space flight and aviation, boats and ships, bullet train, armored combat vehicles at present.Friction stir welding is owing to finish solid-state connection under than the condition low by solder alloy material melting point temperature, so not fusing of metal material, welding contraction distortion is little and the mechanical property loss is low, and outstanding advantage is arranged.
Aluminum alloy materials is widely used in industry and civil area, the special shape aluminum alloy materials is used as the support frame of product more and more widely in recent years, at present, along with the size of LCD TV is increasing, the original engineering plastics that use of TV frame can not satisfy the requirement of intensity and rigidity, need to adopt the high aluminium alloy extrusions of intensity to make the frame of LCD TV.But because the aluminium alloy extrusions that the LCD TV frame is adopted is a kind of its length; respectively there is the aluminium alloy extrusions of the special shape of a small boss inboard of minor face; adopt traditional aluminium alloy welding method; as TIG weldering (tungsten inert gas arc-welding); the shape and size that MIG weldering (welding) can not guarantee to weld rear boss; and the welding deformation of aluminium alloy extrusions after melting also is that household appliances institute is unacceptable; therefore adopt the technology of friction stir welding; utilize the advantage that welding contraction distortion is little and the mechanical property loss is low, can address the above problem effectively.During friction stir welding, must piece together auxiliary cushion block at the interior outside of aluminium alloy extrusions to be welded edge and form the double-layer aluminium alloy material structure, and the stirring-head of existing friction stir welding is during to the welding of above-mentioned double-layer aluminium alloy material, especially for the welding of special shape aluminum alloy materials, the problem that the lower plywood that causes owing to the doubling plate heat transfer problem that exists does not weld.Patent No. CN200310116992.6 has introduced a kind of utilization has the groove pin to carry out the apparatus and method of friction stir welding, patent 200610010553.0 has been introduced a kind of copper and copper alloy agitating friction welding soldering set, and the stirring-head of two kinds of welding usefulness that these two patents propose all is not suitable for being applied to the friction stir welding of double-layer aluminium alloy material.
The utility model content
The technical problems to be solved in the utility model is: stir when welding at having the special shape aluminium alloy extrusions, the stirring-head of existing agitating friction welding usefulness is difficult to solve the problem that lower plywood that the doubling plate heat transfer problem causes does not weld, and the technological difficulties that problem caused such as the inhomogeneous and shape of material thickness is special, make the agitating friction welding be difficult to the effect that reaches desirable.
In order to solve the problems of the technologies described above, the technical solution of the utility model is: a kind of stirring-head of friction stir welding comprises the cylindrical connector in rear portion, mediate cylindrical, anterior mixing needle; Be shaped on locking tightening platform on the described cylindrical connector, described mediate cylindrical is shaped on heat emission spiral groove; The procephalic mixing needle of described stirring is conical, and this trochoidal surface is shaped on helicla flute; The termination of described mediate cylindrical is the taper seat of indent with the shaft shoulder that the mixing needle bottom is connected, and is evenly distributed to few three helical grooves on the described mixing needle taper seat, and the top of this mixing needle is shaped on hemispherical groove.
Helical groove on the described mixing needle and hemispherical groove intersect, and form at least three breach at semi-circular recesses edge, the top of conical mixing needle.
The angle of the normal of the taper seat of described shaft shoulder indent and mixing needle axis is 5～15 degree.
The helical angle of described helical groove is 55～65 degree.
The degree of depth of described hemispherical groove is 3～4mm.
Described spiral fluted is shaped as recessed semicircle, and the degree of depth is 2～3mm.
Described helicla flute also can be the triangular-section, and described triangular-section is 54 degree, and the degree of depth is 2～3mm.
The utility model contacts the stirring-head rubbing surface of special shape with the outer surface (or inner surface) of L type aluminium alloy extrusions, during welding, owing on the mixing needle of stirring-head, increased at least three helical grooves, increased a groove on the stirring-head top, this groove is that part circular or part are oval, thereby the plasticity that can add strength aluminum alloy metal when friction stir welding flows, utilize the special metal flow heat production that increases, improved the lower plywood shortage of heat problem that L type aluminium alloy extrusions causes owing to the doubling plate heat transfer problem when friction stir welding, thereby the high-quality of having realized L type aluminium alloy extrusions connects.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described.
The schematic diagram that Fig. 1 uses for the utility model.
Fig. 2 is a structure chart of the present utility model.
The specific embodiment
The special shape L type aluminium alloy extrusions schematic diagram of embodiment of the present utility model is used to make large scale liquid crystal TV frame shown in the preface among Fig. 11.Respectively there is a small boss 5 inboard on the long and short limit of this section bar, and large scale liquid crystal TV L type aluminium alloy extrusions frame welding back requires to guarantee the shape and size of boss, and the welding deformation requirement of aluminium alloy extrusions after melting also is very little.
As shown in Figure 1, in this embodiment, with L type aluminium alloy extrusions 1 counter putting, i.e. the inner surface of stirring-head rubbing surface contact L type aluminium alloy extrusions 1, edge is pieced together auxiliary cushion block 3,4 respectively in the interior outside of L type aluminium alloy extrusions 1 to be welded.
The structure chart of stirring-head of the present utility model 2 shown in Figure 2 comprises the cylindrical connector 7 in rear portion, mediate cylindrical 8, anterior mixing needle 10; Be shaped on locking tightening platform 6 on the cylindrical connector 7, mediate cylindrical 8 is shaped on heat emission spiral groove 9; Stir procephalic mixing needle 10 for conical, this trochoidal surface is shaped on helicla flute 12; The shaft shoulder 14 that the termination of mediate cylindrical 8 is connected with mixing needle 10 bottoms is the taper seat of indent, be evenly distributed to few three helical grooves 13 on mixing needle 10 taper seats, the top of this mixing needle 10 is shaped on hemispherical groove 11, helical groove 13 on the mixing needle intersects with hemispherical groove 11, forms at least three breach at semi-circular recesses 11 edges, the top of conical mixing needle 10.The angle of the normal of the indent conical surface of the shaft shoulder 14 and mixing needle 10 axis is 5～15 degree, and the helical angle of helical groove 13 is 55～65 degree.The degree of depth of hemispherical groove 11 is 3～4mm.Helicla flute 12 be shaped as recessed semicircle, the degree of depth is 2～3mm.Helicla flute 12 also can be the triangular-section, and described triangular-section is 54 degree, and the degree of depth is 2～3mm.
The plasticity that this structure has been strengthened L type aluminium alloy extrusions metal when friction stir welding flows, utilize the special metal flow heat production that increases to improve when agitating friction welds because the lower plywood shortage of heat problem that the doubling plate heat transfer problem causes, having solved friction stir welding technology needs the specific (special) requirements of contact friction to the welding position, after L type aluminium alloy extrusions adds auxiliary cushion block 3,4, improved the heat transfer problem of doubling plate, realized that the high-quality of L section bar connects.The generation heat that plastic deformation flows in welding process, mainly be to produce by extruding in mixing needle 10 welding processes of the special shape of stirring-head 5 front tapers, at least 3 helical grooves 13 of processing on the taper mixing needle 10, increased plastic metal flowing from the bottom up, when up flowing, runs on the metal that flows the shaft shoulder 14 of indent, under the stopping of the shaft shoulder 14 of indent, metal moves downward again, at this moment the metal of Liu Donging has just formed one from lower to upper again by last closed down mutually flow field, makes plastic metal form violent motion.According to the plastic metal process principle, the strenuous exercise of plastic metal will produce a large amount of heats.Simultaneously be processed into semi-circular recesses 11 on the top of taper mixing needle 10, and and helical groove 13 intersect, form 3 breach at the edge of the top of taper mixing needle 10 semi-circular recesses 11, be convenient to plastic metal and from breach, flow out and flow into.
When welding, by special anchor clamps with L type aluminium alloy extrusions 1, and auxiliary cushion block 3,4 are clamped on the welding bench, stirring-head 2 begins rotation and inserts auxiliary cushion block 3 from the C point, begin welding then, at this moment L type aluminium alloy extrusions 1 and auxiliary cushion block 3,4 form an overall structure on thickness direction, the heat transfer of the heat that is produced by the shaft shoulder 14 spin frictions of stirring-head 2 can continuous carrying out, when stirring-head 2 arrives the A point, be two-layer on the thickness direction, be L type aluminium alloy extrusions and auxiliary cushion block 3, because the seam crossing between L-shaped section 1 and auxiliary cushion block 3 has an air layer interface, and air is the non-conductor of heat, thereby the heat between the double layer of metal is difficult to transmit.Be in following auxiliary cushion block 3 because at this moment shortage of heat is easy to generate the problem that welding is not gone up, but following auxiliary cushion block 3 is technology cushion blocks, needs machining to remove after the welding, so it doesn't matter for the quality of cushion block welding quality.After stirring-head 2 arrived the D point, at this moment L type aluminium alloy extrusions had welded and has finished.
Below be a practical application example that adopts the utility model to weld:
Through verification experimental verification, during welding, adopt stirring-head of the present utility model after, stirring-head rotation speed 600 rev/mins than the slow-speed of revolution time, just can obtain the good weld seam of welding quality, and the rotating speed of existing stirring-head must reach 1000 rev/mins, and welding effect is also undesirable.
In addition to the implementation, the utility model can also have other embodiments, and as rotation direction of helical groove or the like, all employings are equal to replaces or technical scheme that equivalent transformation forms, all drops in the protection domain of the utility model requirement.
Claims (7)
1. the stirring-head of a friction stir welding comprises the cylindrical connector in rear portion (7), mediate cylindrical (8), anterior mixing needle (10); Be shaped on locking tightening platform (6) on the described cylindrical connector (7), described mediate cylindrical (8) is shaped on heat emission spiral groove (9); It is characterized in that: the procephalic mixing needle of described stirring (10) is for conical, and this trochoidal surface is shaped on helicla flute (12); The termination of described mediate cylindrical (8) is the taper seat of indent with the shaft shoulder (14) that mixing needle (10) bottom is connected, be evenly distributed to few three helical grooves (13) on described mixing needle (10) taper seat, the top of this mixing needle (10) is shaped on hemispherical groove (11).
2. the stirring-head of a kind of friction stir welding according to claim 1, it is characterized in that: the helical groove (12) on the described mixing needle (10) intersects with hemispherical groove (11), forms at least three breach at the semi-circular recesses edge, top of conical mixing needle (10).
3. the stirring-head of a kind of friction stir welding according to claim 1 is characterized in that: the angle of the normal of the described shaft shoulder (13) the indent conical surface and mixing needle (10) axis is 5～15 degree.
4. the stirring-head of a kind of friction stir welding according to claim 1 and 2 is characterized in that:, the helical angle of described helical groove (13) is 55～65 degree.
5. the stirring-head of a kind of friction stir welding according to claim 1, it is characterized in that: the degree of depth of described hemispherical groove (11) is 3～4mm.
6. the stirring-head of a kind of friction stir welding according to claim 1 is characterized in that: described helicla flute (9) be shaped as recessed semicircle, the degree of depth is 2～3mm.
7. the stirring-head of a kind of friction stir welding according to claim 6, it is characterized in that: described helicla flute (9) also can be the triangular-section, and described triangular-section is 54 degree, and the degree of depth is 2～3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200425628U CN201102125Y (en) | 2007-11-13 | 2007-11-13 | Agitator head for agitating friction welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200425628U CN201102125Y (en) | 2007-11-13 | 2007-11-13 | Agitator head for agitating friction welding |
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| CN201102125Y true CN201102125Y (en) | 2008-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2007200425628U Expired - Lifetime CN201102125Y (en) | 2007-11-13 | 2007-11-13 | Agitator head for agitating friction welding |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103071915A (en) * | 2013-02-06 | 2013-05-01 | 南京航空航天大学 | Friction stir welding stirring head capable of reducing forward resistance |
| CN103071916A (en) * | 2013-02-06 | 2013-05-01 | 南京航空航天大学 | Shaft shoulder-free friction stir welding stirring head capable of reducing flash |
| CN103846542A (en) * | 2012-11-29 | 2014-06-11 | 上海航天设备制造总厂 | Solid-phase welding method and device of overlap connection of aluminum materials and high melting point metal |
| CN105290607A (en) * | 2015-12-02 | 2016-02-03 | 北京航天新风机械设备有限责任公司 | Stirring head for FSSW of aluminum alloy lapping structure |
| CN105750726A (en) * | 2016-05-07 | 2016-07-13 | 宁波金凤焊割机械制造有限公司 | Welding head for friction stir welding |
| CN106271030A (en) * | 2016-09-20 | 2017-01-04 | 江西理工大学 | A kind of stagewise stirring-head for the weldering of slab agitating friction |
| CN106312291A (en) * | 2016-10-31 | 2017-01-11 | 南京航空航天大学 | Friction stir welding stir-welding head provided with cutting edges |
| CN107999952A (en) * | 2017-11-10 | 2018-05-08 | 上海航天设备制造总厂 | Micro- stirring friction welding agitator head and stirring tool |
| CN108031967A (en) * | 2017-11-28 | 2018-05-15 | 上海航天设备制造总厂 | The upset force self compensation stirring tool and welding method of aclinal agitating friction weldering |
| CN108188564A (en) * | 2017-12-28 | 2018-06-22 | 重庆派馨特机电有限公司 | A kind of agitating friction weldering cutter for being conveniently replaceable stirring-head |
| CN110640296A (en) * | 2019-09-26 | 2020-01-03 | 沈阳航空航天大学 | Friction stir welding stirring head capable of improving material flowing behavior |
| CN113172333A (en) * | 2021-05-31 | 2021-07-27 | 四川航天长征装备制造有限公司 | Friction stir welding stirring head capable of improving penetration depth |
-
2007
- 2007-11-13 CN CNU2007200425628U patent/CN201102125Y/en not_active Expired - Lifetime
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103846542A (en) * | 2012-11-29 | 2014-06-11 | 上海航天设备制造总厂 | Solid-phase welding method and device of overlap connection of aluminum materials and high melting point metal |
| CN103071915A (en) * | 2013-02-06 | 2013-05-01 | 南京航空航天大学 | Friction stir welding stirring head capable of reducing forward resistance |
| CN103071916A (en) * | 2013-02-06 | 2013-05-01 | 南京航空航天大学 | Shaft shoulder-free friction stir welding stirring head capable of reducing flash |
| CN103071916B (en) * | 2013-02-06 | 2015-10-07 | 南京航空航天大学 | The stirring-head without shaft shoulder friction stir welding of overlap can be reduced |
| CN105290607B (en) * | 2015-12-02 | 2017-12-19 | 北京航天新风机械设备有限责任公司 | A kind of stirring-head of aluminum alloy lapped structure friction stir spot welding |
| CN105290607A (en) * | 2015-12-02 | 2016-02-03 | 北京航天新风机械设备有限责任公司 | Stirring head for FSSW of aluminum alloy lapping structure |
| CN105750726A (en) * | 2016-05-07 | 2016-07-13 | 宁波金凤焊割机械制造有限公司 | Welding head for friction stir welding |
| CN106271030A (en) * | 2016-09-20 | 2017-01-04 | 江西理工大学 | A kind of stagewise stirring-head for the weldering of slab agitating friction |
| CN106312291A (en) * | 2016-10-31 | 2017-01-11 | 南京航空航天大学 | Friction stir welding stir-welding head provided with cutting edges |
| CN106312291B (en) * | 2016-10-31 | 2018-07-24 | 南京航空航天大学 | A kind of stirring friction welding agitator head with cutting edge |
| CN107999952A (en) * | 2017-11-10 | 2018-05-08 | 上海航天设备制造总厂 | Micro- stirring friction welding agitator head and stirring tool |
| CN108031967A (en) * | 2017-11-28 | 2018-05-15 | 上海航天设备制造总厂 | The upset force self compensation stirring tool and welding method of aclinal agitating friction weldering |
| CN108188564A (en) * | 2017-12-28 | 2018-06-22 | 重庆派馨特机电有限公司 | A kind of agitating friction weldering cutter for being conveniently replaceable stirring-head |
| CN110640296A (en) * | 2019-09-26 | 2020-01-03 | 沈阳航空航天大学 | Friction stir welding stirring head capable of improving material flowing behavior |
| CN113172333A (en) * | 2021-05-31 | 2021-07-27 | 四川航天长征装备制造有限公司 | Friction stir welding stirring head capable of improving penetration depth |
| CN113172333B (en) * | 2021-05-31 | 2022-08-09 | 四川航天长征装备制造有限公司 | Friction stir welding stirring head capable of improving penetration depth |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20071113 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |