CN113102875A - Coaxial powder feeding backfill type friction stir spot welding tool and method - Google Patents
Coaxial powder feeding backfill type friction stir spot welding tool and method Download PDFInfo
- Publication number
- CN113102875A CN113102875A CN202110525519.1A CN202110525519A CN113102875A CN 113102875 A CN113102875 A CN 113102875A CN 202110525519 A CN202110525519 A CN 202110525519A CN 113102875 A CN113102875 A CN 113102875A
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- 238000003756 stirring Methods 0.000 title claims abstract description 106
- 238000003466 welding Methods 0.000 title claims abstract description 79
- 239000000843 powder Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000003825 pressing Methods 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims description 35
- 229910052751 metal Inorganic materials 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 12
- 230000009471 action Effects 0.000 claims description 10
- 239000003814 drug Substances 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 4
- 230000004927 fusion Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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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
Abstract
The invention provides a coaxial powder feeding backfill type friction stir spot welding tool and a method thereof, wherein the tool comprises a stirring pin, a shaft shoulder and a pressing sleeve, a feeding channel is arranged on a central shaft of the stirring pin, the shaft shoulder is sleeved on the stirring pin, and the pressing sleeve is sleeved on the shaft shoulder.
Description
Technical Field
The invention relates to the technical field of welding, in particular to a coaxial powder feeding backfill type friction stir spot welding tool and a method.
Background
Friction stir spot welding is a novel welding technique developed from friction stir welding techniques. The working principle of the friction stir welding device is basically the same as that of friction stir welding, and the difference is that the friction stir spot welding device does not move linearly along with a stirring tool, so that the welding operation is completed in situ. In the conventional friction stir spot welding, the welded material is forced to extrude out of a welding area due to the fact that the stirring head is inserted, the welding area is not filled with the material in the process that the stirring head is pulled out after welding is finished, and a process tail hole similar to the shape of the stirring pin is remained after welding is finished.
The existence of the process tail hole weakens the strength and the comprehensive performance of a welding joint, and in order to solve the problem, Germany GKSS company provides a backfill friction stir spot welding device, and a welding tool for realizing backfill type friction stir spot welding by extruding and backfilling welding materials is formed by adopting a split type stirring head and three combined actions of a pressing sleeve, a shaft shoulder and a stirring pin for preventing materials at a welding area from overflowing.
During backfilling friction stir spot welding, due to the existence of cavities among the stirring pin, the shaft shoulder and the pressing sleeve, extruded partial materials are inevitably remained in the cavities, the backfilled materials are partially lost, a pit is formed in a welding area, meanwhile, an annular groove is formed in the joint, and the comprehensive performance of the joint is directly influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a coaxial powder feeding backfill type friction stir spot welding tool and a method, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a coaxial powder feeding backfill formula friction stir spot welding instrument, includes stirring pin, shaft shoulder and compresses tightly the cover, the center pin of stirring pin is provided with the pay-off passageway, the shaft shoulder cup joints on the stirring pin, it cup joints on the shaft shoulder to compress tightly the cover.
Further, the diameter of the feeding channel is 0.1mm-0.3 mm.
A coaxial powder feeding backfill type friction stir spot welding method comprises the following steps:
s1, processing a feeding channel which is arranged along the length direction of the stirring pin and used for the powder to pass through on the central shaft of the stirring pin, and connecting the stirring pin to a welding driving device;
s2, sleeving the shaft shoulder on the stirring pin;
s3, sleeving the pressing sleeve on the shaft shoulder;
s4, before welding, the shaft shoulder and the lower surface of the pressing sleeve are positioned on the same plane;
s5, positioning the stirring tool above the welding spot, and simultaneously pressing the stirring pin, the shaft shoulder and the pressing sleeve on the upper surface of the welding spot;
s6, moving the stirring pin upwards by 0.1-4mm relative to the shaft shoulder and the pressing sleeve to form a cavity between the bottom of the stirring pin and the bottom of the shaft shoulder;
s7, conveying the medicine powder into the cavity through the feeding channel;
s8, moving the bottom of the stirring pin downwards to the medicinal powder in the cavity, and compacting;
s9, when welding starts, the stirring pin rotates downwards to press the powder material in the cavity into the parent metal at high speed, the shaft shoulder moves upwards, the material in the welding area of the parent metal is plasticized under the stirring and extruding action of the stirring pin, the added powder and the plasticized material of the parent metal are extruded to flow downwards to the cavity left by the upward movement of the shaft shoulder, and in the process, the granular powder and the plasticized material are fully fused;
s10, after the fusion, the stirring needle is drawn back upwards, the shaft shoulder rotates downwards, and the plasticized parent metal and the filled powder in the cavity are backfilled to a welding area under the stirring and extruding action of the shaft shoulder to form a welding point;
s11, adjusting the stirring pin and the shaft shoulder to return to the zero point position at the same time, and continuing to rotate on the surface of the welding spot after the stirring pin and the shaft shoulder return to the zero point position so as to ensure that the plasticized parent metal and the added powder material flow sufficiently and the surface of the welding spot is smoother, and the welding process is finished through the disclosure of the invention, compared with the prior art, the welding process has the following characteristics:
according to the invention, powder is added in the welding process through the coaxial powder feeding backfill type friction stir spot welding tool, so that the problems of pits and annular grooves existing in the conventional backfill type friction stir spot welding method are effectively solved. Meanwhile, the addition of the powder can also realize additive manufacturing on the test board.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic cross-sectional view of the structure of the present invention;
FIG. 2 is a schematic diagram of the operation of the present invention 1;
FIG. 3 is a schematic diagram of the operation of the present invention 2.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Referring to fig. 1, the present invention provides a technical solution: a coaxial powder feeding backfill type friction stir spot welding tool comprises a stirring pin 1, a shaft shoulder 2 and a pressing sleeve 3, wherein a feeding channel 11 is arranged at the central shaft of the stirring pin 1, the diameter of the feeding channel 11 is 0.1mm-0.3mm, preferably, the diameter of the feeding channel 11 is 0.3mm, by adopting the design, the smooth passing of powder can be ensured, wherein the powder can be SiC particles, carbon nano tubes and other strong toughness reinforcing particles, and can also be aluminum alloy and the like which are the same as the welded material so as to realize material increase manufacturing, the shaft shoulder 2 is sleeved on the stirring pin 1, and the pressing sleeve 3 is sleeved on the shaft shoulder 2. Meanwhile, the addition of the powder can also realize additive manufacturing on the test board.
The invention provides a technical scheme that: a coaxial powder feeding backfill type friction stir spot welding method comprises the following steps as shown in figure 2:
example 1:
s1, processing a feeding channel 11 arranged along the length direction of the stirring pin and used for the medicine powder to pass through on the central shaft of the stirring pin 1, and connecting the stirring pin to a welding driving device;
s2, sleeving the shaft shoulder 2 on the stirring pin 1;
s3, sleeving the pressing sleeve 3 on the shaft shoulder 2;
s4, before welding, the shaft shoulder 2 and the lower surface of the pressing sleeve 3 are positioned on the same plane;
s5, positioning the stirring tool above the welding spot, and simultaneously pressing the stirring pin 1, the shaft shoulder 2 and the pressing sleeve 3 on the upper surface of the welding spot;
s6, moving the stirring pin 1 upwards by 0.1-4mm relative to the shaft shoulder 2 and the pressing sleeve 3, so that a cavity is formed between the bottom of the stirring pin 1 and the bottom of the shaft shoulder 2;
s7, conveying the medicine powder into the cavity through the feeding channel 11;
s8, moving the bottom of the stirring pin 1 downwards to the medicine powder in the cavity and compacting;
s9, when welding starts, the stirring pin 1 rotates and moves downwards to press the powder material in the cavity into the parent metal at high speed, the shaft shoulder 2 moves upwards, the material in the welding area of the parent metal is plasticized under the stirring and extruding action of the stirring pin 1, the added powder and the plasticized material of the parent metal are extruded and flow downwards to the cavity left by the upward movement of the shaft shoulder 2, and in the process, the granular powder and the plasticized material are fully fused;
s10, after the fusion, the stirring needle is drawn back upwards, the shaft shoulder 2 rotates downwards, and the plasticized parent metal and the filled powder in the cavity are backfilled to the welding area under the stirring and extruding action of the shaft shoulder 2 to form a welding point;
and S11, adjusting the stirring pin 1 and the shaft shoulder 2 to return to the zero point position simultaneously, and continuing to rotate on the surface of the welding spot after the stirring pin 1 and the shaft shoulder 2 return to the zero point position so as to ensure that the plasticized base material and the added powder material flow sufficiently, so that the surface of the welding spot is smoother, and the welding process is completed.
Example 2:
as shown in fig. 3, S1, positioning the stirring tool above the welding point, and simultaneously pressing the stirring pin 1, the shaft shoulder 2 and the pressing sleeve 3 onto the upper surface of the welding point after assembling, wherein the position is used as a zero point position;
s2, moving the stirring pin 1 of the welding tool upwards relative to the shaft shoulder 2 and the pressing sleeve 3 for a certain distance, wherein the distance is the height d of the object manufactured by the additive manufacturing, a cavity is formed between the shaft shoulder 2 and the lower end surface of the stirring pin 1, granular powder serving as a filling material is sent into the cavity through the feeding channel 11 at the central core shaft of the stirring pin 1, and the lower end surface of the stirring pin 1 presses the filling powder in the cavity;
s3, when welding starts, the stirring pin 1 rotates and moves downwards to press the powder material in the cavity into the base material at a high speed, the shaft shoulder 2 moves upwards, the material in the welding area of the base material is plasticized under the stirring and extruding action of the stirring pin 1, the added powder and the plasticized material of the base material flow to the cavity left by the upward movement of the shaft shoulder 2 under the extruding action of the stirring pin 1, and in the process, the granular powder and the plasticized material are fully fused;
s4, drawing back the stirring pin 1 upwards, and rotating the shaft shoulder 2 downwards to enable the plasticized parent metal and the filled powder in the cavity to backfill the welding area under the stirring and extruding action of the shaft shoulder 2 to form a welding point;
s5, adjusting the position of the stirring pin 1 to a position d away from the zero point, adjusting the shaft shoulder 2 to return to the zero point, and after the stirring pin 1 and the shaft shoulder 2 return to the respective positions, continuing welding and surface rotating to ensure the sufficient flow of the plasticized parent metal and the added powder material, so that the welding spot forms a cylinder with the diameter being the same as that of the stirring pin 1 and the height being d, completing the material increase manufacturing process, and then processing the cylinder according to the requirement.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and the same devices are denoted by the same reference numerals, and thus the description thereof will be omitted.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. The utility model provides a coaxial powder feeding backfill formula friction stir spot welding instrument which characterized in that includes:
the stirring pin comprises a stirring pin 1, wherein a feeding channel 11 is arranged on the central shaft of the stirring pin 1;
the shaft shoulder 2 is sleeved on the stirring pin 1;
and the pressing sleeve 3 is sleeved on the shaft shoulder 2.
2. The coaxial powder feeding backfill type friction stir spot welding tool according to claim 1, characterized in that: the diameter of the feeding channel 11 is 0.1mm-0.3 mm.
3. The method for friction stir spot welding with coaxial powder feeding and backfilling according to claims 1-2, which is characterized by comprising the following steps:
s1, processing a feeding channel 11 arranged along the length direction of the stirring pin and used for the medicine powder to pass through on the central shaft of the stirring pin 1, and connecting the stirring pin to a welding driving device;
s2, sleeving the shaft shoulder 2 on the stirring pin 1;
s3, sleeving the pressing sleeve 3 on the shaft shoulder 2;
s4, before welding, the shaft shoulder 2 and the lower surface of the pressing sleeve 3 are positioned on the same plane;
s5, positioning the stirring tool above the welding spot, and simultaneously pressing the stirring pin 1, the shaft shoulder 2 and the pressing sleeve 3 on the upper surface of the welding spot;
s6, moving the stirring pin 1 upwards by 0.1-4mm relative to the shaft shoulder 2 and the pressing sleeve 3, so that a cavity is formed between the bottom of the stirring pin 1 and the bottom of the shaft shoulder 2;
s7, conveying the medicine powder into the cavity through the feeding channel 11;
s8, moving the bottom of the stirring pin 1 downwards to the medicine powder in the cavity and compacting;
s9, when welding starts, the stirring pin 1 rotates and moves downwards to press the powder material in the cavity into the parent metal at high speed, the shaft shoulder 2 moves upwards, the material in the welding area of the parent metal is plasticized under the stirring and extruding action of the stirring pin 1, the added powder and the plasticized material of the parent metal are extruded and flow downwards to the cavity left by the upward movement of the shaft shoulder 2, and in the process, the granular powder and the plasticized material are fully fused;
s10, after the fusion, the stirring needle is drawn back upwards, the shaft shoulder 2 rotates downwards, and the plasticized parent metal and the filled powder in the cavity are backfilled to the welding area under the stirring and extruding action of the shaft shoulder 2 to form a welding point;
and S11, adjusting the stirring pin 1 and the shaft shoulder 2 to return to the zero point position simultaneously, and continuing to rotate on the surface of the welding spot after the stirring pin 1 and the shaft shoulder 2 return to the zero point position so as to ensure that the plasticized base material and the added powder material flow sufficiently, so that the surface of the welding spot is smoother, and the welding process is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110525519.1A CN113102875A (en) | 2021-05-12 | 2021-05-12 | Coaxial powder feeding backfill type friction stir spot welding tool and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110525519.1A CN113102875A (en) | 2021-05-12 | 2021-05-12 | Coaxial powder feeding backfill type friction stir spot welding tool and method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113351984A (en) * | 2021-07-20 | 2021-09-07 | 东北大学秦皇岛分校 | Heat source assisted stirring friction additive manufacturing device and method |
| CN113977067A (en) * | 2021-11-22 | 2022-01-28 | 中国兵器工业第五九研究所 | Friction material increase blank manufacturing method |
| CN114433997A (en) * | 2022-03-22 | 2022-05-06 | 大连交通大学 | Pre-slotting type zinc particle filling friction stir welding method |
| CN115464248A (en) * | 2022-09-15 | 2022-12-13 | 中国航空制造技术研究院 | Double-drive differential backfill type friction stir spot welding main shaft |
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| US20110266330A1 (en) * | 2010-04-30 | 2011-11-03 | Bruck Gerald J | Filler rotated friction stir welding |
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| CN106825906A (en) * | 2017-02-23 | 2017-06-13 | 广东省焊接技术研究所（广东省中乌研究院） | One kind silk filling backfill formula friction stir spot welding method and instrument |
| JPWO2016166842A1 (en) * | 2015-04-15 | 2018-03-01 | 株式会社小松製作所 | Method for manufacturing metal member |
| CN111805073A (en) * | 2020-06-30 | 2020-10-23 | 西安交通大学 | Powder reinforced friction stir rivet welding method and device |
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2021
- 2021-05-12 CN CN202110525519.1A patent/CN113102875A/en active Pending
Patent Citations (6)
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| US20110266330A1 (en) * | 2010-04-30 | 2011-11-03 | Bruck Gerald J | Filler rotated friction stir welding |
| CN102560472A (en) * | 2012-02-22 | 2012-07-11 | 河海大学 | Metal surface nano-composite processing device with stirring head capable of synchronously feeding powder, and method |
| CN102615417A (en) * | 2012-04-19 | 2012-08-01 | 中国航空工业集团公司北京航空制造工程研究所 | Injection type stirring friction welding device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113351984A (en) * | 2021-07-20 | 2021-09-07 | 东北大学秦皇岛分校 | Heat source assisted stirring friction additive manufacturing device and method |
| CN113351984B (en) * | 2021-07-20 | 2022-07-05 | 东北大学秦皇岛分校 | Heat source assisted stirring friction additive manufacturing device and method |
| CN113977067A (en) * | 2021-11-22 | 2022-01-28 | 中国兵器工业第五九研究所 | Friction material increase blank manufacturing method |
| CN114433997A (en) * | 2022-03-22 | 2022-05-06 | 大连交通大学 | Pre-slotting type zinc particle filling friction stir welding method |
| CN114433997B (en) * | 2022-03-22 | 2023-08-08 | 大连交通大学 | Pre-slotting type zinc particle filling friction stir welding method |
| CN115464248A (en) * | 2022-09-15 | 2022-12-13 | 中国航空制造技术研究院 | Double-drive differential backfill type friction stir spot welding main shaft |
| CN115464248B (en) * | 2022-09-15 | 2023-12-29 | 中国航空制造技术研究院 | Double-drive differential backfill type friction stir spot welding main shaft |
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