CN102848072A - Double-shaft-shoulder stirring friction head comprising lower shaft shoulder at adjustable position - Google Patents
Double-shaft-shoulder stirring friction head comprising lower shaft shoulder at adjustable position Download PDFInfo
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- CN102848072A CN102848072A CN2012103433439A CN201210343343A CN102848072A CN 102848072 A CN102848072 A CN 102848072A CN 2012103433439 A CN2012103433439 A CN 2012103433439A CN 201210343343 A CN201210343343 A CN 201210343343A CN 102848072 A CN102848072 A CN 102848072A
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- friction head
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Abstract
The invention discloses a double-shaft-shoulder stirring friction head comprising a lower shaft shoulder at an adjustable position. The double-shaft-shoulder stirring friction head comprises a mounting column, an upper shaft shoulder, a stirring pin and the lower shaft shoulder, wherein the mounting column and the stirring pin are respectively fixed at two ends of the upper shaft shoulder, the lower shaft shoulder is fixedly sleeved on the stirring pin, and the distance from the lower shaft shoulder to the upper shaft shoulder can be adjusted by shifting the lower shaft shoulder. The double-shaft-shoulder stirring friction head is simple and practical in structure, adaptability of the double-shaft-shoulder stirring friction head to plate thicknesses of workpieces is improved, and the double-shaft-shoulder stirring friction head plays an important role in controlling the quality of weld joints.
Description
Technical field
The invention belongs to the Material Joining Technology field, relate to a kind of welding equipment, relate in particular to the adjustable twin shaft shoulder agitating friction head in a kind of lower shaft shoulder position.
Background technology
Twin shaft shoulder friction stir welding is the Extended Technology in traditional agitating friction welding field, is fit to welding hollow member, cut deal, has wide practical use in fields such as Aeronautics and Astronautics, shipbuildings.During the welding of twin shaft shoulder agitating friction, the upper and lower shaft shoulder, mixing needle rotate simultaneously and give birth to heat with friction of workpiece, and under strong friction, stirring action, weld metal plastifies, and are rotated and are squeezed to the stirring-head rear side, thus the formation weld seam.Therefore twin shaft is takeed on the important impact that forming of agitating friction header structure butt welded seam, yet the current twin shaft shoulder agitating friction head upper and lower shaft shoulder spacings of fixing that adopt more, the metal of thickness of slab can only be welded and fixed, such as parameter adjustment or thickness of slab error, then welding requirements can not be satisfied.
In order to address this problem, axle base must be adjustable up and down.General Adopts measure is to make the shaft shoulder and mixing needle produce axial displacement to regulate up and down shaft shoulder spacing both at home and abroad, change the method for the upper shaft shoulder and the axial relative displacement of mixing needle such as proposition in the patent (application number 201210044981.0), and the lower shaft shoulder and the axial relative displacement of mixing needle are constant; Ma Zongyi proposes to adopt knockdown friction stir welding tool in patent (CN101209512), but only for traditional agitating friction welding, is not suitable for the welding of twin shaft shoulder agitating friction.
For this reason, the inventor proposes to realize the up and down adjustable purpose of shaft shoulder spacing by changing the method for the lower shaft shoulder and the axial relative displacement of mixing needle, thereby improves the flexibility of twin shaft shoulder friction stir welding welding manner.
Summary of the invention
Goal of the invention: the object of the invention is to for the deficiencies in the prior art, provide a kind of lower shaft shoulder position adjustable twin shaft shoulder agitating friction head, by changing the method for the lower shaft shoulder and the axial relative displacement of mixing needle, realize the adjustable purpose of upper and lower shaft shoulder spacing, avoided up and down shaft shoulder spacing to cause that fixedly welding manner regulates inflexible shortcoming.
Technical scheme: the twin shaft shoulder agitating friction head that a kind of lower shaft shoulder of the present invention position is adjustable, comprise erection column, the upper shaft shoulder, mixing needle and the lower shaft shoulder, described erection column and mixing needle are separately fixed at the two ends of the shaft shoulder, described lower shaft shoulder suit is fixed on the mixing needle, regulates the spacing of itself and the upper shaft shoulder by the mobile lower shaft shoulder.
Further improve technique scheme, the described lower shaft shoulder is fixed on the mixing needle by the helicitic texture suit.
Further, above-mentioned friction head also comprises lower shaft shoulder lid and regulates axle sleeve, be provided with two sections external screw threads that lines is opposite on the described mixing needle, be followed successively by the first external screw thread and the second external screw thread from the upper shaft shoulder, mixing needle passes successively the lower shaft shoulder and regulates axle sleeve and cooperate with it by the first external screw thread, the second external screw thread, described adjusting axle sleeve is provided with flange near an end outer wall of the lower shaft shoulder, the described lower shaft shoulder is provided be used to the cavity that holds flange, by the lower shaft shoulder lid flange is fixed in the cavity, described adjusting axle sleeve can move axially in cavity.
In order to enlarge the adjustable range between the lower shaft shoulder and the upper shaft shoulder, described the first external screw thread and the second external screw thread interval arrange.
Between the upper shaft shoulder and the first external screw thread, be provided with three external screw thread opposite with its lines on the described mixing needle.
In order to make the plasticizing metal flow abundant, also in order to reduce the weld seam overlap, have the involute curve groove on the contact-making surface of the described upper shaft shoulder and the lower shaft shoulder and workpiece to be welded.
Further, described erection column, the upper shaft shoulder and mixing needle are the integral type structure.
Be provided with the keyway of being convenient to fix on the described erection column, it cooperates with metallic bond, and friction head can not be rotated with respect to main shaft.
Upper and lower shaft shoulder spacing Principles of Regulation are as follows: when mixing needle passes successively the lower shaft shoulder, regulates axle sleeve, and after being connected with it by the first external screw thread and the second external screw thread respectively, because thread rotary orientation is different, when needs produced same axial displacement, the lower shaft shoulder was opposite with the rotation direction of regulating axle sleeve; Utilize this characteristics, when needs increased spacing, the lower shaft shoulder down rotated with the adjusting axle sleeve, and after the shaft shoulder spacing value of meeting the requirements of, axle sleeve is regulated in rotation up and down, until the top of the flange that regulating shaft puts and lower shaft shoulder lid or cavity fits tightly; When needs reduce spacing, the lower shaft shoulder rotates up with the adjusting axle sleeve, make the change amount of lower shaft shoulder axial displacement identical with the change amount of required spacing, continue rotation and regulate axle sleeve, until the top of the flange that regulating shaft puts and lower shaft shoulder lid or cavity fits tightly; During welding, the stirring-head rotation, welded piece applies the moment of reaction to the lower shaft shoulder, make the lower shaft shoulder have vertically the up or down trend of motion, regulate the same motion of axle sleeve generation yet want to make, must have identical moment, therefore regulate the axle sleeve tension or held out against time shaft shoulder, stoped time shaft shoulder to move up or down, shaft shoulder spacing is in setting value and is not changed thereby kept up and down.
The present invention compared with prior art, its beneficial effect is: (1) upper shaft shoulder and mixing needle are connected as a single entity, and have simplified the stirring-head structure; (2) respectively with the shaft shoulder, adjusting axle sleeve, the easily spacing between the shaft shoulder about the manual adjustments under the different direction rotations; (3) in welding process, the effect by different rotation direction screw threads on the mixing needle makes to be regulated the axle sleeve tension or holds out against the lower shaft shoulder, and making in the welding process up and down, the spacing of the shaft shoulder remains unchanged; (4) said structure is simple and practical, to strengthening twin shaft shoulder agitating friction head to adaptive capacity, the control weldquality important in inhibiting of workpiece thickness of slab.
Description of drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation of described erection column, the upper shaft shoulder and mixing needle.
Fig. 3 is the described lower shaft shoulder and the structural representation of regulating axle sleeve.
Fig. 4 is welding schematic diagram of the present invention.
Fig. 5 is the curved grooves schematic diagram on the lower shaft shoulder and the welded piece contact-making surface.
Plasticizing metal flow track schematic diagram when Fig. 6 is welding.
The specific embodiment
The below is elaborated to technical solution of the present invention, but protection scope of the present invention is not limited to described embodiment.
Referring to Fig. 1 and 2, the twin shaft shoulder agitating friction head that a kind of lower shaft shoulder position is adjustable, mainly by forming with lower member: be successively from top to bottom: erection column 2, the upper shaft shoulder 3, mixing needle 4, the lower shaft shoulder 5, lower shaft shoulder lid 6 and adjusting axle sleeve 7, wherein, have keyway 1 on the erection column 2, erection column 2, the upper shaft shoulder 3, mixing needle 4 are the integral type structure, relative displacement is immutable between them, on mixing needle 4, be processed with successively from top to bottom the first right-hand thread 4-1, left-hand thread 4-2, light beam 4-3, the second right-hand thread 4-4.
Referring to Fig. 3, the lower shaft shoulder 5, to regulate axle sleeve 7 be axially symmetric structure, and the lower shaft shoulder 5 tops are internal thread hole, matches with left-hand thread 4-2 on the mixing needle 4; Screw thread in the adjusting axle sleeve 7 matches with the second right-hand thread 4-4 on the mixing needle 4, and the rotation direction of left-hand thread 4-2, the second right-hand thread 4-4 is opposite; Behind the cavity of regulating axle sleeve 7 shaft shoulder 5 bottoms under the screw thread 4-4 precession, lower shaft shoulder lid 6 links to each other with the lower shaft shoulder 5 by screw, thereby the flanged limits that will regulate axle sleeve 7 tops is in the cavity of the lower shaft shoulder 5 bottoms.
The erection sequence of agitating friction head is as follows: after erection column 2 stretched in the spindle mounting hole, the operator can by the fixing stirring-head of key and keyway 1, make it relatively main shaft rotation; Mixing needle 4 passes the lower shaft shoulder 5 and cooperates with it by left-hand thread 4-2; Then mixing needle 4 passes adjusting axle sleeve 7 and cooperates with it by the second right-hand thread 4-4; When regulating flange on the axle sleeve 7 behind the cavity of the screw thread 4-4 precession shaft shoulder 5 bottoms, lower shaft shoulder lid 6 links to each other with the lower shaft shoulder 5 by screw, is used for stopping that regulating axle sleeve 7 moves downward, namely stop its break away under the inside of the shaft shoulder 5.Can finish installation according to above order.
Shaft shoulder spacing adjustment process up and down:
Referring to Fig. 1, Fig. 2, Fig. 3, after mixing needle 4 passes successively the lower shaft shoulder 5, adjusting axle sleeve 7 and is connected with it by left-hand thread 4-2, the second right-hand thread 4-4 respectively, because thread rotary orientation is different, when needs produced same axial displacement, the lower shaft shoulder 5 was opposite with the rotation direction of regulating axle sleeve 7; Utilize this characteristics, when needs increased spacing, the lower shaft shoulder 5 is clockwise (overlooking) rotation progressively, after the shaft shoulder spacing value of meeting the requirements of, regulated axle sleeve 7 and was rotated counterclockwise (overlooking) up and down, fitted tightly until regulate flange and the lower shaft shoulder lid 6 of axle sleeve 7; When needs reduce spacing, regulate axle sleeve 7 turn clockwise (overlooking), make the change amount of axial displacement identical with the change amount of required spacing, then descend the shaft shoulder 5 counterclockwise (overlooking) rotation, until till shaft shoulder lid 6 fits tightly with the flange of regulating axle sleeve 7 down; During welding, stirring-head turn clockwise (overlooking), it is counterclockwise that 8 pairs of lower shaft shoulders 5 of welded piece have applied the moment of reaction (overlooking), make the lower shaft shoulder 5 have the trend that moves upward vertically, yet want to make adjusting axle sleeve 7 to produce same motion, must have (overlooking) moment that turns clockwise, therefore regulate axle sleeve 7 and strained time shaft shoulder 5, stoped time shaft shoulder 5 to move upward, shaft shoulder spacing is in setting value and is not changed thereby kept up and down.
After the spacing of the shaft shoulder is regulated end up and down, can enter normal welding procedure.
Referring to Fig. 4, in the welding process, welded piece 8 is held between the shaft shoulder 3, the lower shaft shoulder 5, and mixing needle 4 then passes welded piece 8, when twin shaft shoulder agitating friction head turned clockwise (overlooking), the upper shaft shoulder 3, the lower shaft shoulder 5, mixing needle 4 carried out frictional heat to workpiece simultaneously.
Referring to Fig. 5, in order to make the plasticizing metal flow abundant, also in order to reduce the weld seam overlap, processed the involute curve groove at the lower shaft shoulder 5 with workpiece 8 contact-making surfaces; The upper shaft shoulder 3 is also gradually opened district's line trenches with welded piece 8 contact-making surfaces, and is consistent with the groove on the lower shaft shoulder 5 end faces.
Referring to Fig. 6, mixing needle 4, under the effect of the shaft shoulder 3, the lower shaft shoulder 5, near the mixing needle 4 plasticizing metal will move along thickness direction, formed the circulation 9 of " extruding-fill ", because the first right-hand thread 4-1 of participation stirring welding is opposite with the rotation direction of left-hand thread 4-2, therefore to circulate situation symmetrical on the thickness direction of welded piece 8 for plastic metal, just by this circulation, realized metal flow and appearance of weld simultaneously.
As mentioned above, although represented and explained the present invention with reference to specific preferred embodiment, it shall not be construed as the restriction to the present invention self.Under the spirit and scope of the present invention prerequisite that does not break away from the claims definition, can make in the form and details various variations to it.
Claims (8)
1. the adjustable twin shaft in lower shaft shoulder position is takeed on the agitating friction head, comprise erection column, the upper shaft shoulder, mixing needle and the lower shaft shoulder, described erection column and mixing needle are separately fixed at the two ends of the shaft shoulder, it is characterized in that, described lower shaft shoulder suit is fixed on the mixing needle, regulates the spacing of itself and the upper shaft shoulder by the mobile lower shaft shoulder.
2. the adjustable twin shaft shoulder agitating friction head in lower shaft shoulder position according to claim 1 is characterized in that, the described lower shaft shoulder is fixed on the mixing needle by the helicitic texture suit.
3. the adjustable twin shaft in lower shaft shoulder position according to claim 2 is takeed on the agitating friction head, it is characterized in that, also comprise lower shaft shoulder lid and regulate axle sleeve, be provided with two sections external screw threads that lines is opposite on the described mixing needle, be followed successively by the first external screw thread and the second external screw thread from the upper shaft shoulder, mixing needle passes successively the lower shaft shoulder and regulates axle sleeve and pass through the first external screw thread, the second external screw thread cooperates with it, described adjusting axle sleeve is provided with flange near an end outer wall of the lower shaft shoulder, the described lower shaft shoulder is provided be used to the cavity that holds flange, by the lower shaft shoulder lid flange is fixed in the cavity, described adjusting axle sleeve can move axially in cavity.
4. the adjustable twin shaft shoulder agitating friction head in lower shaft shoulder position according to claim 3 is characterized in that, described the first external screw thread and the second external screw thread interval arrange.
5. the adjustable twin shaft shoulder agitating friction head in the lower shaft shoulder according to claim 4 position is characterized in that, is provided with three external screw thread opposite with its lines on the described mixing needle between the upper shaft shoulder and the first external screw thread.
6. the adjustable twin shaft shoulder agitating friction head in lower shaft shoulder position according to claim 1 is characterized in that, has the involute curve groove on the contact-making surface of the described upper shaft shoulder and the lower shaft shoulder and workpiece to be welded.
7. the adjustable twin shaft shoulder agitating friction head in lower shaft shoulder position according to claim 1 is characterized in that, described erection column, the upper shaft shoulder and mixing needle are the integral type structure.
8. the adjustable twin shaft shoulder agitating friction head in lower shaft shoulder position according to claim 1 is characterized in that, is provided with the keyway of being convenient to fix on the described erection column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012103433439A CN102848072A (en) | 2012-09-17 | 2012-09-17 | Double-shaft-shoulder stirring friction head comprising lower shaft shoulder at adjustable position |
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| CN2012103433439A CN102848072A (en) | 2012-09-17 | 2012-09-17 | Double-shaft-shoulder stirring friction head comprising lower shaft shoulder at adjustable position |
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| CN2012103433439A Pending CN102848072A (en) | 2012-09-17 | 2012-09-17 | Double-shaft-shoulder stirring friction head comprising lower shaft shoulder at adjustable position |
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Cited By (18)
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| CN103111750A (en) * | 2013-03-01 | 2013-05-22 | 重庆市科学技术研究院 | Welding joint and method for improving friction stir welding strength |
| CN103273187A (en) * | 2013-05-06 | 2013-09-04 | 姚雪飞 | Aluminum and aluminum alloy spiral tube molding welding device |
| CN103273190A (en) * | 2013-05-17 | 2013-09-04 | 江苏科技大学 | Static double-shaft-shoulder stirring friction head used for stirring friction welding machine |
| CN103894723A (en) * | 2014-03-13 | 2014-07-02 | 哈尔滨工业大学 | Friction-stir welding tool capable of increasing overlap-joint area of aluminum steel and welding method |
| CN103934295A (en) * | 2014-01-13 | 2014-07-23 | 宛亚坤 | Jointing device and jointing method |
| CN104139240A (en) * | 2014-07-31 | 2014-11-12 | 上海拓璞数控科技有限公司 | Withdrawable double-shaft-shoulder stirring head |
| CN104439692A (en) * | 2014-11-25 | 2015-03-25 | 哈尔滨工业大学 | Self-holding type friction stir welding stirring head with stirring needle capable of being independently replaced and application method of stirring head |
| CN105171230A (en) * | 2015-09-30 | 2015-12-23 | 张立华 | Double-shaft-shoulder stirring head with automatically-adjusted clearance |
| CN105537755A (en) * | 2016-03-02 | 2016-05-04 | 江苏科技大学 | Lantern ring type air-cooling double-shaft-shoulder friction stir device |
| CN105555462A (en) * | 2013-11-07 | 2016-05-04 | 三菱重工业株式会社 | Friction stir welding method |
| CN106583917A (en) * | 2017-02-23 | 2017-04-26 | 江苏科技大学 | Air-liquid combined cooling device and cooling method for double-shaft-shoulder friction stir head |
| CN106583915A (en) * | 2016-12-30 | 2017-04-26 | 广东省焊接技术研究所（广东省中乌研究院） | Novel linear friction welding method and tool |
| CN107876962A (en) * | 2017-11-20 | 2018-04-06 | 宁波金凤焊割机械制造有限公司 | Double-shaft shoulder stirring friction welding agitator head and its welding method |
| CN109396636A (en) * | 2018-10-23 | 2019-03-01 | 上海航天设备制造总厂有限公司 | A kind of laser coaxial heat is to auxiliary double-shaft shoulder friction stir welding method |
| CN110877148A (en) * | 2019-11-29 | 2020-03-13 | 上海航天设备制造总厂有限公司 | Multistage floating type shaft shoulder dual-drive friction stir welding device and welding method |
| CN111618534A (en) * | 2020-06-05 | 2020-09-04 | 苏州市永创金属科技有限公司 | Method for preparing carbon nano tube reinforced aluminum matrix composite by using double-shaft shoulder stirring and rubbing process |
| CN113857642A (en) * | 2020-06-30 | 2021-12-31 | 安东大学校产学协力团 | Friction stir welding tool with adjustable probe length and shaft shoulder groove depth |
| CN114012242A (en) * | 2021-11-10 | 2022-02-08 | 四川航天长征装备制造有限公司 | Double-shaft-shoulder stirring head with self-adaptive adjustment of shaft shoulder distance and welding method |
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| JP2004202536A (en) * | 2002-12-25 | 2004-07-22 | Mitsubishi Heavy Ind Ltd | Friction stir welding apparatus and method using bobbin tool |
| CN101947691A (en) * | 2010-09-29 | 2011-01-19 | 哈尔滨工业大学 | Self-supporting friction stir welding method with unequal diameters of upper and lower shaft shoulders and stirring head thereof |
| CN101979209A (en) * | 2010-11-29 | 2011-02-23 | 哈尔滨工业大学 | Self-maintained friction stir welding method with reversely rotating upper and lower shaft shoulders |
| WO2012098810A1 (en) * | 2011-01-19 | 2012-07-26 | 日本軽金属株式会社 | Rotary tool unit, friction stir welding method, double-skin panel assembly, and friction stir welding method for double-skin panel assembly |
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| CN103111750A (en) * | 2013-03-01 | 2013-05-22 | 重庆市科学技术研究院 | Welding joint and method for improving friction stir welding strength |
| CN103273187A (en) * | 2013-05-06 | 2013-09-04 | 姚雪飞 | Aluminum and aluminum alloy spiral tube molding welding device |
| CN103273187B (en) * | 2013-05-06 | 2016-06-15 | 姚雪飞 | Aluminum and aluminum alloy spiral pipe molding welding equipment |
| CN103273190A (en) * | 2013-05-17 | 2013-09-04 | 江苏科技大学 | Static double-shaft-shoulder stirring friction head used for stirring friction welding machine |
| CN103273190B (en) * | 2013-05-17 | 2015-05-13 | 江苏科技大学 | Static double-shaft-shoulder stirring friction head used for stirring friction welding machine |
| US10155282B2 (en) | 2013-11-07 | 2018-12-18 | Mitsubishi Heavy Industries Engineering, Ltd. | Friction stir welding method |
| CN105555462A (en) * | 2013-11-07 | 2016-05-04 | 三菱重工业株式会社 | Friction stir welding method |
| CN105555462B (en) * | 2013-11-07 | 2017-12-12 | 三菱重工业株式会社 | Friction stirring connecting method |
| CN103934295B (en) * | 2014-01-13 | 2016-09-07 | 宛亚坤 | Engagement device and joint method |
| CN103934295A (en) * | 2014-01-13 | 2014-07-23 | 宛亚坤 | Jointing device and jointing method |
| 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 |
| CN103894723A (en) * | 2014-03-13 | 2014-07-02 | 哈尔滨工业大学 | Friction-stir welding tool capable of increasing overlap-joint area of aluminum steel and welding method |
| CN104139240A (en) * | 2014-07-31 | 2014-11-12 | 上海拓璞数控科技有限公司 | Withdrawable double-shaft-shoulder stirring head |
| CN104439692A (en) * | 2014-11-25 | 2015-03-25 | 哈尔滨工业大学 | Self-holding type friction stir welding stirring head with stirring needle capable of being independently replaced and application method of stirring head |
| CN105171230B (en) * | 2015-09-30 | 2019-04-30 | 张立华 | A kind of gap automatic adjustment double-shaft shoulder stirring-head |
| CN105171230A (en) * | 2015-09-30 | 2015-12-23 | 张立华 | Double-shaft-shoulder stirring head with automatically-adjusted clearance |
| CN105537755B (en) * | 2016-03-02 | 2018-03-06 | 江苏科技大学 | A kind of air-cooled double-shaft shoulder agitating friction device of lantern ring type |
| CN105537755A (en) * | 2016-03-02 | 2016-05-04 | 江苏科技大学 | Lantern ring type air-cooling double-shaft-shoulder friction stir device |
| CN106583915A (en) * | 2016-12-30 | 2017-04-26 | 广东省焊接技术研究所（广东省中乌研究院） | Novel linear friction welding method and tool |
| CN106583917A (en) * | 2017-02-23 | 2017-04-26 | 江苏科技大学 | Air-liquid combined cooling device and cooling method for double-shaft-shoulder friction stir head |
| CN107876962A (en) * | 2017-11-20 | 2018-04-06 | 宁波金凤焊割机械制造有限公司 | Double-shaft shoulder stirring friction welding agitator head and its welding method |
| CN109396636A (en) * | 2018-10-23 | 2019-03-01 | 上海航天设备制造总厂有限公司 | A kind of laser coaxial heat is to auxiliary double-shaft shoulder friction stir welding method |
| CN110877148A (en) * | 2019-11-29 | 2020-03-13 | 上海航天设备制造总厂有限公司 | Multistage floating type shaft shoulder dual-drive friction stir welding device and welding method |
| CN110877148B (en) * | 2019-11-29 | 2021-06-11 | 上海航天设备制造总厂有限公司 | Multistage floating type shaft shoulder dual-drive friction stir welding device and welding method |
| CN111618534A (en) * | 2020-06-05 | 2020-09-04 | 苏州市永创金属科技有限公司 | Method for preparing carbon nano tube reinforced aluminum matrix composite by using double-shaft shoulder stirring and rubbing process |
| CN113857642A (en) * | 2020-06-30 | 2021-12-31 | 安东大学校产学协力团 | Friction stir welding tool with adjustable probe length and shaft shoulder groove depth |
| US11453083B2 (en) | 2020-06-30 | 2022-09-27 | Andong National University Industry-Academic Cooperation Foundation | Friction stir welding (FSW) tool with adjustable probe length and shoulder groove depth |
| CN114012242A (en) * | 2021-11-10 | 2022-02-08 | 四川航天长征装备制造有限公司 | Double-shaft-shoulder stirring head with self-adaptive adjustment of shaft shoulder distance and welding method |
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Application publication date: 20130102 |