CN103071916B - The stirring-head without shaft shoulder friction stir welding of overlap can be reduced - Google Patents
The stirring-head without shaft shoulder friction stir welding of overlap can be reduced Download PDFInfo
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- CN103071916B CN103071916B CN201310046262.7A CN201310046262A CN103071916B CN 103071916 B CN103071916 B CN 103071916B CN 201310046262 A CN201310046262 A CN 201310046262A CN 103071916 B CN103071916 B CN 103071916B
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- 238000003466 welding Methods 0.000 title claims abstract description 49
- 238000003756 stirring Methods 0.000 title claims abstract description 19
- 230000007704 transition Effects 0.000 claims abstract description 8
- 230000007246 mechanism Effects 0.000 claims abstract description 4
- 241001581440 Astroides Species 0.000 claims description 3
- 241000219793 Trifolium Species 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 50
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
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- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 229910000743 fusible alloy Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
A kind of can reduce overlap without shaft shoulder stirring friction welding agitator head, it is made up of grip shank (1), support cylinder body (2), anterior cylinder (3) and mixing needle (4), one end of anterior cylinder (3) is mixing needle (4), the other end is support cylinder body (2), and support cylinder body (2) is connected with grip shank (1); Grip shank (1) is milled with clamping plane (5); There is arc transition grip shank (1) and support cylinder body (2) junction; A transition mechanism (6) is had between anterior cylinder (3) and support cylinder body (2), it is characterized in that described mixing needle (4) is space curve revolving structure, the root diameter (RD) that mixing needle (4) is connected with anterior cylinder (3) is greater than diameter at the bottom of the top of mixing needle (4), circular arc pin top (7) is provided with at the bottom of the top of mixing needle (4), in mixing needle (4) root and anterior cylinder (3) join domain edge, be provided with an annular protrusion structure (9).The present invention can weld the sheet material of different-thickness and without the need to changing stirring-head, can improve automatization level.
Description
Technical field
The present invention relates to a kind of Material Joining Technology, especially a kind of Friction welding technique, specifically a kind of stirring-head without shaft shoulder friction stir welding that can reduce overlap.
Background technology
As everyone knows, friction stir welding (FSW) is a kind of novel solid phase joining technique, is applicable to low-melting alloy welding.Be 1991 by Britain's institute of welding (The Welding Institute, TWI) (US 5460317) that invent, the principle of this technology utilizes the stirring-head of High Rotation Speed to insert in weld seam, utilize strong friction and the stirring action of stirring-head, make solder design district be in hot plastic state and make it be tending towards fusing, mixing, be joined together under certain active force, stirring-head is advanced forward, then form weld seam at the rear of stirring-head, thus complete solid diffusivity.
Stirring-head is the core of agitating friction solder technology, realizes the key technology of friction stir welding.Stirring-head is in order to provide heat required in stir friction welding process, and be the carrier that welded seam area thermoplastic realizes directed transfer, be also that thermoplastic realizes spreading the instrument be connected with adjacent material simultaneously.External related research institutes has all carried out large quantifier elimination in the profile design, material selection and processing technology etc. of stirring-head.In international monopoly (WO 93110935), stirring-head shaft shoulder end face is plane, and its axis is vertical with surface of the work; In Chinese patent (CN 1144499A), concave shaped is changed into the end surface shape of the stirring-head shaft shoulder, axis deviate from certain angle (main shaft angle) relative to workpiece normal direction.In order to promote the moulding flowing of weld metal zone material better, many patents are also had to carry out the improvement of various ways to the shaft shoulder.
In the production practices of agitating friction welding, can encounter such sheet material needs to weld:
1) need the sheet metal thickness of welding uneven;
2) need the two boards material thickness of welding not identical.
For traditional stirring and friction-welding stirring-head, when encountering sheet material in uneven thickness, if when the change of inequality is less, can by intrusion when constantly adjustment is welded, even change stirring-head to weld, but welding can make the mechanical property of weld seam reduce like this.If thickness difference is comparatively large, or when varied in thickness is more violent, then has no idea to weld.
The situation different for the two boards material thickness encountering needs welding is that traditional way is that reduction processing is carried out in sheet material commissure thick for thickness, makes two boards material thickness identical, then welds.The fussy degree of the welding so not only increased, is more reduction of the mechanical property of sheet material.
United States Patent (USP) (US 7404510B2, US 7416102B1) relate to without shaft shoulder stirring and friction-welding stirring-head.This stirring-head can the sheet material of throat thickness inequality, also can weld the even sheet material of two boards thickness ununiformity.But it will be very large to there is advance side Reducing thickness in the stirring-head postwelding sheet material that this patent relates to, retreat the situation that side overlap is very large, easily there is defect, have a strong impact on welding quality, greatly reduce the mechanical property of weld seam, and weld seam also unsightly, this patent is made to be difficult to use in production practices.
Summary of the invention
The object of the invention is the problem that can not adapt to the friction welding in different-thickness sheet material and the inconsistent situation of same sheet metal thickness for existing friction stir welding stirring-head, invention one can be applicable to the welding of different-thickness sheet material, the stirring-head without shaft shoulder friction stir welding that can reduce overlap that variable thickness before and after same sheet material causes can be adapted to again, it can effectively reduce agitating friction welded seam advance side Reducing thickness, retreat side overlap, improves weldquality.
Technical scheme of the present invention is:
A kind of can reduce overlap without shaft shoulder stirring friction welding agitator head, it is made up of grip shank 1, support cylinder body 2, anterior cylinder 3 and mixing needle 4, one end of anterior cylinder 3 is the mixing needle 4 be integrated with it, the other end is support cylinder body 2, support cylinder body 2 is connected with grip shank 1, and stirring-head grip shank 1, support cylinder body 2, anterior cylinder 3 and mixing needle 4 is coaxial configuration; Grip shank 1 is milled with clamping plane 5; There is arc transition grip shank 1 and support cylinder body 2 junction; A transition mechanism 6 is had between anterior cylinder 3 and support cylinder body 2, it is characterized in that described mixing needle 4 is space curve revolving structure, the root diameter (RD) that mixing needle 4 is connected with anterior cylinder 3 is greater than diameter at the bottom of the top of mixing needle 4, circular arc pin top 7 is provided with at the bottom of the top of mixing needle 4, in mixing needle 4 root and anterior cylinder 3 join domain edge, be provided with an annular protrusion structure 9.
The space curve of described formation mixing needle 4 revolving structure is all or part of curved section of circular arc line, oval camber line, folium, butterfly curve, involute, double-arc epicycloid, astroid, leaf line, trifolium, spiral of Archimedes, log spiral or stationary point, peak three curve.
At least be provided with three helical grooves 8 on the surface at mixing needle 4, helical groove 8 all starts from mixing needle pin top 7, and is evenly distributed on mixing needle.
Helical groove 8 opening on mixing needle 4 should perpendicular to mixing needle surface, and the degree of depth is not less than 0.5mm.
The height of the annular protrusion structure 9 arranged at mixing needle 4 root and anterior cylinder 3 edge conjunction place is not less than 0.5mm.
Beneficial effect of the present invention:
Stirring-head of the present invention, by improving without shaft shoulder stirring and friction-welding stirring-head mixing needle surface configuration and structure, solving and stirring the advance side Reducing thickness of welded blank existence very greatly without the shaft shoulder, retreat side overlap very large, easily occur the problem of defect.This stirring-head can apply to the uneven sheet material of throat thickness, in the production practices of the two boards material that variable thickness causes, improves production efficiency, and is easy to the automation realizing production.
The present invention can throat thickness change sheet material, and do not need change stirring-head, solve the Welding Problems of the sheet material of varied in thickness; This stirring-head can also be used for the two boards material welding different-thickness, solves the Welding Problems between different-thickness sheet material; When using this stirring-head to weld, for the material of different-thickness being no more than mixing needle thickness, can not stirring-head be changed, welding process easily is automated.
By adopt the present invention design without shaft shoulder stirring-head and common testing without shaft shoulder stirring-head, actual measurement proves, the advance side without shaft shoulder stirring-head of the present invention with retrogressing side difference in height attenuating more than 50%.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structure for amplifying schematic diagram of mixing needle of the present invention.
Fig. 3 is the schematic diagram of the present invention when being applied to the sheet material of two pieces of variable thickness samples.
Fig. 4 is the close-up schematic view of Fig. 3.
Fig. 5 is the schematic diagram that the present invention is applied to sheet material in uneven thickness, and the sheet material connected in figure is that non-welding portion is high, and welding portion is low.
Fig. 6 is the close-up schematic view of Fig. 5.
The sheet material connected in Fig. 7 is for welding portion is low, and non-welding portion is high.
Fig. 8 is the close-up schematic view of Fig. 7.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further illustrated.
As shown in Figure 1, 2.
Can reduce overlap without a shaft shoulder stirring friction welding agitator head, it is made up of grip shank 1, support cylinder body 2, anterior cylinder 3, mixing needle 4.One end of anterior cylinder 3 is the mixing needle 4 be integrated with it, and the other end is support cylinder body 2, and support cylinder body 2 is connected with grip shank 1, and stirring-head grip shank 1, support cylinder body 2, anterior cylinder 3 and mixing needle 4 is coaxial configuration.Grip shank 1 is milled with clamping plane 5; There is arc transition grip shank 1 and support cylinder body 2 junction; A transition mechanism 6 is had between anterior cylinder 3 and support cylinder body 2; Anterior cylinder 3 is directly identical with mixing needle 4 base diameter, does not have shaft shoulder structure; As shown in Figure 1, bottom mixing needle be circular arc pin top 7; Mixing needle is distributed with spiral groove structured 8; At mixing needle root and edge place, anterior cylinder connection region, have an annular protrusion structure 9.
As shown in Figure 2.Mixing needle 4 surface of the present invention is space curved surface structure, space curved surface is rotated by circular arc line or other curves and is generated, and these curves comprise: all or part of curved section of the curves such as circular arc line, oval camber line, folium, butterfly curve, involute, double-arc epicycloid, astroid, leaf line, trifolium, spiral of Archimedes, log spiral, stationary point, peak three curve.Mixing needle 4 have on the surface three or be greater than three spiral groove structured 8, spiral groove structured 8 all start from mixing needle pin top 7, be evenly distributed on mixing needle 8.Helical groove 8 opening on mixing needle 4 should perpendicular to mixing needle surface, and the degree of depth need be greater than 0.5mm.In mixing needle 4 root and anterior cylinder 3 join domain edge, have an annular protrusion structure, the degree of depth is greater than 0.5mm.
Fig. 3,4 is that the present invention carries out using state schematic diagram when docking welding to the sheet material of two pieces of variable thickness samples, the sheet material to be connected representing two pieces of different-thickness is respectively represented respectively shown in sequence 10 in figure and sequence 11, wherein sheet material shown in sequence 10 is thicker than sheet material shown in sequence 11, the thickness of sequence 10 sheet material is 6mm, and the thickness of sequence 11 sheet material is 5mm.
Fig. 5,6 is special plate welding process schematic diagram in uneven thickness, and the sequence number 12 in figure represents in uneven thickness at the position sheet material of weld seam, and some regions are thicker, and some regions are thinner.The sheet material connected in Fig. 5 is that non-welding portion is high, and welding portion is low.Fig. 7,8 is also special plate welding process schematic diagram in uneven thickness, and the sheet material connected in Fig. 7 is for welding portion is low, and non-welding portion is high.
the implementation process of welding job of the present invention is:
As shown in Figure 3,4.Mixing needle 4 root radius is 10mm, and pin is long is 10mm, and form the curve position circular curve of mixing needle curved surface, arc radius is 20mm.Stirring-head has 3 arc-shapeds starting from mixing needle top spiral groove structured, the degree of depth of groove structure is 0.8mm.Agitating friction welding parameter is welding inclination angle 2.5
o, stirring-head is arranged on the main shaft of welding equipment.In the process of welding, the rotary motion of mixing needle 4 and forward travel have driven the flowing of material, due to the vibrational power flow of special curved surface and groove and edge protuberance, side is retreated when material flow to, material will encounter curved surface, curved surface will provide a downward power to be applied on material, material is flowed downward, the bulge-structure at the groove on mixing needle and pin edge, all by limiting material trend outwardly, material is made to flow out weld metal zone, so with common without compared with shaft shoulder stirring-head, the overlap formed is very little; When material flow to advance side, outwards flow out because retrogressing side limits material, groove structure along the groove on mixing needle and edge protuberance and mixing needle formation is flow to advance side by material, advance side has enough materials to supplement the material of mixing needle extruding loss, so with common without compared with shaft shoulder stirring-head, the Reducing thickness of advance side will be very little.
The part that the present invention does not relate to prior art that maybe can adopt all same as the prior art is realized.
Claims (3)
1. one kind can reduce overlap without shaft shoulder stirring friction welding agitator head, it is made up of grip shank (1), support cylinder body (2), anterior cylinder (3) and mixing needle (4), one end of anterior cylinder (3) is the mixing needle (4) be integrated with it, the other end is support cylinder body (2), support cylinder body (2) is connected with grip shank (1), and stirring-head grip shank (1), support cylinder body (2), anterior cylinder (3) and mixing needle (4) are coaxial configuration; Grip shank (1) is milled with clamping plane (5); There is arc transition grip shank (1) and support cylinder body (2) junction; A transition mechanism (6) is had between anterior cylinder (3) and support cylinder body (2), it is characterized in that described mixing needle (4) is space curve revolving structure, the root diameter (RD) that mixing needle (4) is connected with anterior cylinder (3) is greater than diameter at the bottom of the top of mixing needle (4), circular arc pin top (7) is provided with at the bottom of the top of mixing needle (4), in mixing needle (4) root and anterior cylinder (3) join domain edge, be provided with an annular protrusion structure (9); At least be provided with three helical grooves (8) on the surface at mixing needle (4), helical groove (8) all starts from mixing needle pin top (7), and is evenly distributed on mixing needle; The space curve of described formation mixing needle (4) revolving structure is all or part of curved section of circular arc line, oval camber line, folium, butterfly curve, involute, double-arc epicycloid, astroid, leaf line, trifolium, spiral of Archimedes, log spiral or stationary point, peak three curve.
2. the stirring-head without shaft shoulder friction stir welding that can reduce overlap according to claim 1, is characterized in that: helical groove (8) opening on mixing needle (4) should perpendicular to mixing needle surface, and the degree of depth is not less than 0.5mm.
3. the stirring-head without shaft shoulder friction stir welding that can reduce overlap according to claim 1, is characterized in that: the height of the annular protrusion structure (9) arranged at mixing needle (4) root and anterior cylinder (3) edge conjunction place is not less than 0.5mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310046262.7A CN103071916B (en) | 2013-02-06 | 2013-02-06 | The stirring-head without shaft shoulder friction stir welding of overlap can be reduced |
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| CN201310046262.7A CN103071916B (en) | 2013-02-06 | 2013-02-06 | The stirring-head without shaft shoulder friction stir welding of overlap can be reduced |
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| CN103071916B true CN103071916B (en) | 2015-10-07 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103894723B (en) * | 2014-03-13 | 2016-01-20 | 哈尔滨工业大学 | A kind of agitating friction soldering set and welding method that can increase aluminum steel overlap joint bonded area |
| CN103949769A (en) * | 2014-05-05 | 2014-07-30 | 西北工业大学 | Stirring head for friction stir welding used for welding parts with different thicknesses and welding method |
| CN105014228B (en) * | 2015-08-03 | 2017-01-18 | 黄山学院 | Stirring head for friction-stir connection of aluminum alloy thin plate and manufacturing method of stirring head |
| CN105108298A (en) * | 2015-08-28 | 2015-12-02 | 昆山斯格威电子科技有限公司 | Combined friction stir welding soldering set capable of removing flash |
| CN106001906B (en) * | 2016-07-08 | 2019-01-01 | 陕西飞机工业（集团）有限公司 | A kind of step structure weld seam friction stir welding method |
| JP6885285B2 (en) * | 2017-09-28 | 2021-06-09 | 日本軽金属株式会社 | How to manufacture a liquid-cooled jacket |
| CN109365991B (en) * | 2018-10-23 | 2020-01-07 | 上海航天设备制造总厂有限公司 | Friction stir welding device and method for realizing weld thickening |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002224859A (en) * | 2001-01-31 | 2002-08-13 | Nippon Light Metal Co Ltd | Friction stir tool and method for using it |
| US7275675B1 (en) * | 2004-08-20 | 2007-10-02 | United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Friction stir weld tools |
| CN201102125Y (en) * | 2007-11-13 | 2008-08-20 | 江苏科技大学 | Agitator head for agitating friction welding |
| CN101774081A (en) * | 2010-03-09 | 2010-07-14 | 南京航空航天大学 | Weld seam lowering and thickness thinning combined stirrer used for friction stir welding |
| JP2010201441A (en) * | 2009-03-02 | 2010-09-16 | Nippon Light Metal Co Ltd | Joining method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE520928C2 (en) * | 2001-05-11 | 2003-09-16 | Svensk Kaernbraenslehantering | Tools for friction stir welding |
| US20060175382A1 (en) * | 2003-11-10 | 2006-08-10 | Packer Scott M | Tool geometries for friction stir spot welding of high melting temperature alloys |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002224859A (en) * | 2001-01-31 | 2002-08-13 | Nippon Light Metal Co Ltd | Friction stir tool and method for using it |
| US7275675B1 (en) * | 2004-08-20 | 2007-10-02 | United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Friction stir weld tools |
| CN201102125Y (en) * | 2007-11-13 | 2008-08-20 | 江苏科技大学 | Agitator head for agitating friction welding |
| JP2010201441A (en) * | 2009-03-02 | 2010-09-16 | Nippon Light Metal Co Ltd | Joining method |
| CN101774081A (en) * | 2010-03-09 | 2010-07-14 | 南京航空航天大学 | Weld seam lowering and thickness thinning combined stirrer used for friction stir welding |
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