CN113059263A - Friction stir welding tool - Google Patents
Friction stir welding tool Download PDFInfo
- Publication number
- CN113059263A CN113059263A CN202110357700.6A CN202110357700A CN113059263A CN 113059263 A CN113059263 A CN 113059263A CN 202110357700 A CN202110357700 A CN 202110357700A CN 113059263 A CN113059263 A CN 113059263A
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- CN
- China
- Prior art keywords
- shaft shoulder
- stirring needle
- friction stir
- stir welding
- welding tool
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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
- B23K20/1255—Tools therefor, e.g. characterised by the shape of the probe
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The invention discloses a friction stir welding tool, which comprises a tool handle, an inner shaft shoulder and a stirring needle, wherein the tool handle, the inner shaft shoulder and the stirring needle are sequentially, coaxially and detachably connected from top to bottom, an outer shaft shoulder is coaxially sleeved outside the inner shaft shoulder, a gap is reserved between the outer shaft shoulder and the inner shaft shoulder, the bottom end of the stirring needle extends out of the outer shaft shoulder, a cross-shaped lug is arranged on the stirring needle, the center of the lug is superposed with the center of the bottom surface of the stirring needle, the part of the stirring needle, which is positioned outside the outer shaft shoulder, is cylindrical, a plurality of spirals are arranged on the stirring needle along the axial direction of the stirring needle, the bottom diameters of the spirals are sequentially increased from the bottom end to the top end of the stirring needle. The invention solves the technical problems of high efficiency and quality guarantee of welding and low use cost, and has the advantages of low use cost, high resource utilization rate, good welding quality and the like.
Description
Technical Field
The invention relates to the technical field of welding machines, in particular to a friction stir welding tool.
Background
The friction stir welding tool is equipment welded by adopting a solid phase connection technology, and is widely applied to the production fields of aerospace, rail transit, electric automobiles and the like because the friction stir welding tool has the advantages of no need of using a welding wire, small heat influence range and the like. The existing friction stir welding tool consists of a tool handle, a shaft shoulder and a stirring needle which are fixedly connected from top to bottom in sequence, and obviously has the following defects: firstly, the stirring pin directly acts on the welding part in the welding process, so that the stirring pin is easy to break, and the stirring pin, the shaft shoulder and the tool handle are fixedly connected, so that once the stirring pin is scrapped together, the use cost is high and the resource utilization rate is low; secondly, because the surface of the stirring pin is smooth, the fluidity of the material in the welding area is poor, the difference of the thermal characteristics is obvious, and in addition, the influence of heat generated by the fact that the shaft shoulder applying forging pressure to the welding area rotates along with the stirring pin during welding causes poor welding quality.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is how to weld with high efficiency and quality guarantee and reduce the use cost.
In order to solve the technical problem, the invention provides a friction stir welding tool which comprises a tool handle, an inner shaft shoulder and a stirring needle, wherein the tool handle, the inner shaft shoulder and the stirring needle are sequentially, coaxially and detachably connected from top to bottom, an outer shaft shoulder is coaxially sleeved outside the inner shaft shoulder, a gap is reserved between the outer shaft shoulder and the inner shaft shoulder, the bottom end of the stirring needle extends out of the outer shaft shoulder, a cross-shaped lug is arranged on the stirring needle, the center of the lug is overlapped with the center of the bottom surface of the stirring needle, the part of the stirring needle, which is positioned outside the outer shaft shoulder, is cylindrical, a plurality of spirals are arranged on the stirring needle in the axial direction of the stirring needle, the bottom diameters of the spirals are sequentially increased from the bottom end to the top end of the stirring needle, and the pitches between the adjacent spirals are sequentially decreased.
In one embodiment of the invention, the edge of the projection overlaps the edge of the bottom surface of the stirring pin.
In one embodiment of the invention, the radial outer edges of a plurality of spirals are attached to the side surface of a virtual circular truncated cone.
In one embodiment of the invention, the groove surface of the helical groove between the spirals is a cambered surface.
In one embodiment of the invention, a matching flange is welded to the top end of the outer shoulder.
In one embodiment of the invention, the distance between the part of the outer shaft shoulder where the stirring pin extends and the corresponding stirring pin peripheral wall is 0.1mm-0.2 mm.
In one embodiment of the invention, the tool shank and the inner shaft shoulder and the stirring pin are in threaded connection.
In one embodiment of the invention, the projection, the spiral and the pin are integrally formed.
In one embodiment of the invention, the outer shoulder is made of a copper alloy material.
In one embodiment of the invention, the top end of the tool shank is provided with a square shaft upwards and coaxially.
Compared with the prior art, the technical scheme of the invention has the following advantages:
1. the detachable connection mode is adopted among the knife handle, the inner shaft shoulder and the stirring needle, so that the damaged part can be independently replaced, the use cost is effectively reduced, and the utilization rate of resources is improved;
2. through set up the central coincidence and be the lug of cross form on the bottom at the stirring needle, and set up a plurality of pitches and spiral end footpath from the bottom of stirring needle to the top spiral that progressively diminishes respectively in proper order and increase progressively on the part that the stirring needle is located the outer shaft shoulder outside along its axial, this just makes the material of welding area can be abundant and even mixture, again through establish including the outer shaft shoulder with outer shoulder coaxial sleeve, and leave gapped setting between the two, this outer shaft shoulder that just makes when the welding apply forging pressure to the welding area can not rotate and produce the heat along with the stirring needle together, from guaranteed welding quality and improved welding efficiency.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the embodiments of the present disclosure taken in conjunction with the accompanying drawings, in which
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic illustration of a partial explosion configuration of the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 1;
the specification reference numbers indicate: 1. the handle of a knife, 2, interior shoulder, 3, pin, 4, outer shoulder, 5, lug, 6, spiral.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
Referring to fig. 1, 2 and 3, a friction stir welding tool includes a tool shank 1, an inner shaft shoulder 2 and a stirring pin 3, which are sequentially and coaxially detachably connected from top to bottom, in which in this embodiment, the tool shank 1 and the inner shaft shoulder 2, and the inner shaft shoulder 2 and the stirring pin 3 are in threaded connection. The damaged part can be replaced independently by the arrangement, so that the technical effects that the use cost is effectively reduced and the utilization rate of resources is effectively improved are achieved. The outer coaxial sleeve of interior shaft shoulder 2 is equipped with outer shaft shoulder 4, leaves the clearance between outer shaft shoulder 4 and the interior shaft shoulder 2, sets up like this and makes outer shaft shoulder 4 of exerting forging pressure to the welding area can not rotate along with pin 3 when the welding to the influence of outer shaft shoulder 4 production of heat to welding quality has been eliminated. The bottom end of the stirring pin 3 extends out of the outer shaft shoulder 4, and is provided with a cross-shaped projection 5, the center of the projection 5 coincides with the center of the bottom surface of the stirring pin 3, and in the embodiment, the edge of the projection 5 is overlapped on the edge of the bottom surface of the stirring pin 3. The part that the stirring pin 3 is located the outer shoulder 4 outside is cylindricly, and is equipped with a plurality of spirals 6 along the axial of stirring pin 3 on it, and 6 end footpaths of the spiral of a plurality of spirals 6 increase progressively from the bottom to the top of stirring pin 3 in proper order, and the pitch between the adjacent spiral 6 decreases progressively from the bottom to the top of stirring pin 3 in proper order, sets up like this and has effectively reduced the transport resistance. In this embodiment, the material of the welding area flows uniformly to all around in the effect level of lug 5 to simultaneously through 6 vertical steady and fast upwards transport of spiral, thereby make the material of welding area can be abundant and even mixture, so realized high-efficient and welded technological effect with guaranteeing the quality.
In a preferred embodiment of the invention, the radially outer edges of the spirals 6 engage the sides of a virtual circular truncated cone, which further reduces the resistance to transport.
In a preferred embodiment of the invention, the groove surface of the groove of the spiral 6 between the spirals 6 is a cambered surface, which reduces the friction between the spiral 6 and the material and effectively prevents the material from getting stuck between the spirals 6.
In a preferred embodiment of the invention, the top end of the outer shoulder 4 is welded with a matching flange, which makes the installation convenient.
In a preferred embodiment of the present invention, the distance between the extension of the pin 3 and the corresponding pin peripheral wall of the outer shoulder 4 is 0.1mm-0.2mm, which not only ensures the pin to rotate normally, but also effectively prevents the material from entering between the inner shoulder 2 and the outer shoulder 4.
In a preferred embodiment of the invention, the projections 5, the spiral 6 and the pin 3 are formed integrally, which enhances the strength of the pin 3.
In a preferred embodiment of the present invention, the outer shaft shoulder 4 is made of a copper alloy material, so that the outer shaft shoulder 4 has a good heat dissipation effect, and the influence of an excessive temperature on the welding quality is effectively avoided.
In a preferred embodiment of the present invention, a square shaft is coaxially disposed on the top end of the tool shank 1, so that the tool shank 1 and the driving device can be conveniently detached from each other.
In conclusion, the detachable connection mode is adopted among the knife handle 1, the inner shaft shoulder 2 and the stirring pin 3, so that the damaged part can be replaced independently; the bottom end of the stirring needle 3 is provided with the cross-shaped convex block 5 which is coincided with the center of the stirring needle, and the part of the stirring needle 3 which is positioned outside the outer shaft shoulder 4 is provided with the plurality of screw pitches and the spiral 6 with the bottom diameter which is gradually decreased and increased from the bottom end to the top end of the stirring needle 3 along the axial direction of the stirring needle, so that the materials in the welding area can be fully and uniformly mixed, and the outer shaft shoulder 4 which applies forging pressure to the welding area is not rotated along with the stirring needle 3 when being arranged; and the outer shaft shoulder 4 applying forging pressure to the welding area does not rotate along with the stirring needle 3 when being arranged, thereby eliminating the influence of heat generated by the outer shaft shoulder 4 on the welding quality, so that the friction stir welding tool can weld with high efficiency and quality guarantee, can reduce the use cost, and has the advantages of low use cost, high resource utilization rate, good welding quality and the like.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.
Claims (10)
1. The utility model provides a friction stir welding instrument, its characterized in that includes that top-down is coaxial in proper order can dismantle handle of a knife, interior shaft shoulder and the stirring needle of connection, the outer coaxial cover of interior shaft shoulder is equipped with outer shaft shoulder, outer shaft shoulder with leave the clearance between the interior shaft shoulder, stretch out the bottom of stirring needle outer shaft shoulder, and be equipped with the lug that is the cross form on it, the center of lug with the bottom surface center coincidence of stirring needle, the stirring needle is located the part in the outer shaft shoulder outside is cylindricly, and follows on it the axial of stirring needle is equipped with a plurality of spirals, and is a plurality of the spiral base footpath of spiral certainly the bottom to the top of stirring needle progressively increases in proper order, and is adjacent the pitch between the spiral progressively decreases from the bottom to the top of stirring needle in proper order.
2. The friction stir welding tool of claim 1 wherein an edge of said projection overlaps an edge of a bottom surface of said pin.
3. The friction stir welding tool of claim 1 wherein the radially outer edges of said plurality of spirals conform to the sides of a virtual truncated cone.
4. The friction stir welding tool of claim 1 wherein the flute surfaces of the helical flutes between the spirals are arcuate.
5. The friction stir welding tool of claim 1 wherein said outer shoulder is welded with a mating flange on a top end thereof.
6. The friction stir welding tool of claim 1 wherein said outer shoulder provides a spacing between said pin extension and said corresponding pin peripheral wall of between 0.1mm and 0.2 mm.
7. The friction stir welding tool of claim 1 wherein said shank and said internal shoulder and said pin are threaded.
8. The friction stir welding tool of claim 1 wherein said lug, said helix, and said pin are integrally formed.
9. The friction stir welding tool of claim 1 wherein the outer shoulder is made of a copper alloy material.
10. The friction stir welding tool of claim 1 wherein the top end of the shank is upwardly and coaxially disposed with a square shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110357700.6A CN113059263A (en) | 2021-04-01 | 2021-04-01 | Friction stir welding tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110357700.6A CN113059263A (en) | 2021-04-01 | 2021-04-01 | Friction stir welding tool |
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| Publication Number | Publication Date |
|---|---|
| CN113059263A true CN113059263A (en) | 2021-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110357700.6A Pending CN113059263A (en) | 2021-04-01 | 2021-04-01 | Friction stir welding tool |
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| CN (1) | CN113059263A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104625394A (en) * | 2015-02-12 | 2015-05-20 | 江苏烁石焊接科技有限公司 | Single-shoulder stirring head used for welding metal clad plates |
| CN108015407A (en) * | 2017-12-28 | 2018-05-11 | 重庆派馨特机电有限公司 | A kind of stirring header structure for agitating friction weldering |
| CN110142501A (en) * | 2019-06-25 | 2019-08-20 | 广东省焊接技术研究所（广东省中乌研究院） | A kind of dead axle shoulder friction stir welding tools and its friction stir welding method |
| CN110919161A (en) * | 2019-11-29 | 2020-03-27 | 湖南九方焊接技术有限公司 | Minor diameter shaft shoulder stirring head |
| CN111843177A (en) * | 2020-07-23 | 2020-10-30 | 航天工程装备（苏州）有限公司 | Dissimilar material friction stir welding tool |
-
2021
- 2021-04-01 CN CN202110357700.6A patent/CN113059263A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104625394A (en) * | 2015-02-12 | 2015-05-20 | 江苏烁石焊接科技有限公司 | Single-shoulder stirring head used for welding metal clad plates |
| CN108015407A (en) * | 2017-12-28 | 2018-05-11 | 重庆派馨特机电有限公司 | A kind of stirring header structure for agitating friction weldering |
| CN110142501A (en) * | 2019-06-25 | 2019-08-20 | 广东省焊接技术研究所（广东省中乌研究院） | A kind of dead axle shoulder friction stir welding tools and its friction stir welding method |
| CN110919161A (en) * | 2019-11-29 | 2020-03-27 | 湖南九方焊接技术有限公司 | Minor diameter shaft shoulder stirring head |
| CN111843177A (en) * | 2020-07-23 | 2020-10-30 | 航天工程装备（苏州）有限公司 | Dissimilar material friction stir welding tool |
Non-Patent Citations (1)
| Title |
|---|
| 中国兵器工业集团第二一〇研究所: "《先进制造领域科技发展报告》", 30 April 2018, pages: 156 * |
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Application publication date: 20210702 |
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