CN114888425B - Self-cleaning smooth surface stirring tool for static shaft shoulder friction stir welding - Google Patents
Self-cleaning smooth surface stirring tool for static shaft shoulder friction stir welding Download PDFInfo
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- CN114888425B CN114888425B CN202210571544.8A CN202210571544A CN114888425B CN 114888425 B CN114888425 B CN 114888425B CN 202210571544 A CN202210571544 A CN 202210571544A CN 114888425 B CN114888425 B CN 114888425B
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- shaft shoulder
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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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Abstract
The invention relates to a self-cleaning smooth surface stirring tool for static shaft shoulder friction stir welding, which is a stirring tool accommodated in the center of a static shaft shoulder, an assembly gap is reserved between a central hole and a stirring needle, metal is driven to the inside of the static shaft shoulder along with the stirring needle through the gap in the welding process, an inclined grinding knife rotating at high speed along with the stirring needle carries out grinding treatment on overflowed metal, the grinding knife drives the overflowed metal to move in a certain track, a fan-shaped discharge hole is formed in the inside of the static shaft shoulder, one side of the fan-shaped discharge hole is provided with a seepage baffle plate for blocking the ground metal, the metal is discharged from the fan-shaped discharge hole after being blocked, the assembly gap, the inclined grinding knife, the seepage baffle plate and the fan-shaped discharge hole jointly act to complete the self-cleaning process of seepage, the overflow metal adhered to the inside of the static shaft shoulder is cleaned while welding is realized, the overflow metal is prevented from being blocked in the static shaft shoulder, the welding process is not required to be cleaned by periodically dismantling a welding device, and the production efficiency is greatly improved.
Description
Technical Field
The invention relates to a self-cleaning smooth surface stirring tool for static shaft shoulder friction stir welding, and belongs to the technical field of friction stir welding.
Background
The static shoulder friction stir welding is used as a novel friction stir welding technology, only a stirring pin and a workpiece are stirred in the welding process, and the static shoulder plays a role in tightening, so that the heat generated during welding is small, the heat affected zone is small, and the welding seam is smoother.
Because the static shaft shoulder friction stir welding device needs to rely on the static shaft shoulder to cooperate together with the stirring tool to finish welding, so that a certain assembly gap exists between the stirring tool and the static shaft shoulder, metal in a welding line continuously enters the device through the assembly gap along with the stirring action of a stirring needle in the welding process, so that the inside of the static shaft shoulder is piled up and overflowed with metal to influence the welding process, the stirring device is required to be removed periodically to clean the overflowed metal, part of metal can be adhered inside the static shaft shoulder at high temperature, the cleaning difficulty is greatly increased, the static shaft shoulder friction stir welding efficiency is seriously reduced, and the development of the technology is always limited.
The invention of application number CN109202266A is a static shaft shoulder friction stir welding tool which is favorable for discharging seepage materials, overflowed metal is blocked by a lower part convex structure of a conical section of the stirring tool, and a seepage material discharge hole is formed in the static shaft shoulder, so that welding is realized and seepage material discharge is realized. However, if the overflow material has insufficient fluidity or the metal adhesion is too large in a plastic state, the inner cavity of the static shaft shoulder and the discharge hole can still be blocked, and the cleaning cost after welding is increased.
Aiming at the problem that the inner cavity of the static shaft shoulder is blocked due to insufficient fluidity of overflowed metal, the development of the static shaft shoulder stirring tool which can automatically clean the overflowed metal and reduce the adhesiveness of the metal in the welding process has important significance.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides the self-cleaning smooth surface stirring tool for the static shaft shoulder friction stir welding, which realizes the real-time cleaning of overflowed metal in the welding process by changing the manufacturing material of the static shaft shoulder and adding three inclined grinding cutters on the upper plane of a stirring pin, and does not need to regularly remove equipment to clean the overflowed metal, thereby improving the welding efficiency.
In order to solve the technical problems, the invention is realized by the following scheme:
a self-cleaning smooth surface stirring tool for static shaft shoulder friction stir welding, and a static shaft shoulder;
the static shaft shoulder is provided with a central hole, and an assembly gap is reserved between the static shaft shoulder central hole and the stirring head;
a fan-shaped discharge hole is formed in the static shaft shoulder, and a seepage baffle is arranged on one side of the fan-shaped discharge hole;
the stirring head passes through the central hole of the static shaft shoulder, and the bottom of the stirring head is provided with a stirring pin;
and three inclined grinding knives extend from the axial shoulder plane to the stirring pin;
the grinding cutters are distributed at a certain inclined angle, and the bottoms of the grinding cutters are semicircular; the central hole wall and the inner part of the static shaft shoulder are in circular arc transition through a circular angle.
Further, the three inclined grinding knives are distributed in a circumferential array at intervals of 120 degrees, when the rotation direction is clockwise, the inclination angle of the grinding knives along the rotation direction is 135 degrees, the other side is 45 degrees, when the rotation direction is anticlockwise, the inclination angle of the grinding knives along the rotation direction is 45 degrees, the other side is 135 degrees, the length of the grinding knives is 2mm, the width is 1mm, the height is 1mm, and the grinding faces are semicircular. The grinding cutters are distributed at a certain inclined angle, and the bottoms of the grinding cutters are semicircular, so that the stability in the grinding process is ensured.
Further, the two cambered surface radiuses of the fan-shaped discharge hole are 10mm and 24mm respectively; the chord lengths of the two arc endpoints are 8mm and 20mm respectively.
Further, titanium alloy is adopted as the material in the static shaft shoulder and the central hole wall, so that the adhesiveness of plastic metal in the hole wall or the static shaft shoulder is reduced.
Further, the height of the seepage baffle plate is 3mm, the thickness is 1mm, and the length is consistent with the size of the fan-shaped discharge hole.
Compared with the prior art, the invention has the remarkable advantages that:
according to the static shaft shoulder friction stir welding tool provided by the invention, overflowed metal in the welding process can be cleaned in real time through the three inclined grinding cutters, so that metal is prevented from being blocked in an assembly gap or stuck in the static shaft shoulder, the grinding cutters rotate along with the stirring pin to grind the metal, meanwhile, the ground metal is discharged outwards in cooperation with centrifugal force generated when the stirring pin rotates, and is discharged from the fan-shaped discharge hole under the blocking effect of the seepage baffle, so that a self-cleaning effect in the welding process is achieved, the device is not required to be removed periodically for cleaning, and the welding production efficiency is greatly improved.
Drawings
FIG. 1 is a front cross-sectional view of a self-cleaning smooth surface stirring tool structure for static shoulder friction stir welding of the present invention.
FIG. 2 is a top view of the self-cleaning smooth surface stirring tool for static shoulder friction stir welding of the present invention.
Fig. 3 is a bottom view of the static shoulder stirring head.
FIG. 4 is a schematic view of a static shoulder stirring head.
Fig. 5 is a flow chart of the stirring tool operation.
In the figure: 1-clamping ends of stirring heads; 2-static shaft shoulders; 3-a hand-held end of the stirring head; 4-a seepage baffle plate; 5-stirring pin; 6-fan-shaped discharge holes; 7-inclined grinding knife.
Detailed Description
A self-cleaning smooth surface stirring tool for static shoulder friction stir welding according to the present invention is further described below with reference to specific examples and accompanying drawings.
1-4, a self-cleaning smooth surface stirring tool for static shoulder friction stir welding, a static shoulder 2;
the static shaft shoulder 2 is provided with a central hole, and an assembly gap is reserved between the central hole of the static shaft shoulder 2 and the stirring head;
a fan-shaped discharge hole 6 is formed in the static shaft shoulder 2, and a seepage baffle 4 is arranged on one side of the fan-shaped discharge hole 6;
the stirring head passes through the central hole of the static shaft shoulder 2, the bottom of the stirring head is provided with a stirring needle 5, and the upper part is provided with a stirring head clamping end 1 and a stirring head holding end 3;
three inclined grinding cutters 7 extend from the shaft shoulder plane of the static shaft shoulder 2 to the stirring pin;
the grinding cutters 7 are distributed at a certain inclined angle, and the bottoms of the grinding cutters 7 are semicircular; the central hole wall and the inner part of the static shaft shoulder 2 are in circular arc transition through a circular angle.
Further, three inclined grinding blades 7 are distributed in a circumferential array at intervals of 120 °, when the rotation direction is clockwise, the inclination angle of the grinding blade along the rotation direction is 135 °, the other side is 45 °, when the rotation direction is counterclockwise, the inclination angle of the grinding blade along the rotation direction is 45 °, the other side is 135 °, the length of the grinding blade is 2mm, the width is 1mm, the height is 1mm, and the grinding surface is semicircular. The grinding cutters are distributed at a certain inclined angle, and the bottoms of the grinding cutters are semicircular, so that the stability in the grinding process is ensured.
Further, the two cambered surface radiuses of the fan-shaped discharge hole 6 are 10mm and 24mm respectively; the chord lengths of the two arc endpoints are 8mm and 20mm respectively.
Further, titanium alloy is adopted for the inner part of the static shaft shoulder 2 and the inner part of the central hole wall, so that the adhesiveness of plastic metal in the hole wall or the inner part of the static shaft shoulder is reduced.
Further, the height of the seepage baffle 4 is 3mm, the thickness is 1mm, and the length is consistent with the size of the fan-shaped discharge hole.
The 7A52 aluminum alloy test plate with the static shaft shoulder friction stir welding size of 200 x 100 x 12mm is taken as a study object. The stirring head is required to be fixed in the main shaft cutter handle of the gantry friction stir welding machine before welding, and then the static shaft shoulder shell is fixed on main shaft equipment by using a fastening screw in the form shown in fig. 1. Setting welding parameters, clamping a plate, and then performing welding operation, wherein the concrete implementation process of the self-cleaning smooth surface stirring tool is as follows:
in the welding process of aluminum alloy, the stirring pin rotates along with the main shaft, the overflowed aluminum alloy enters the inside of the static shaft shoulder through the stirring pin which rotates at a high speed along with an assembly gap under the stirring action of the stirring pin and the extrusion action of the static shaft shoulder, if the static shaft shoulder shell is still made of steel, a large amount of aluminum alloy can adhere to the central hole wall and the upper end surface of the central hole due to the extremely high adhesiveness of the aluminum alloy in a plastic state, and the welding operation is seriously influenced; and when the static shaft shoulder shell is made of titanium alloy, the adhesiveness of the aluminum alloy in a plastic state is reduced, and the aluminum alloy is not easy to adhere to the inside of the static shaft shoulder. The three inclined grinding knives grind and clean the aluminum alloy overflowed from the center hole in real time under the high-speed rotation, so that the phenomenon that the aluminum alloy is accumulated near the center hole to obstruct the welding process is avoided, the ground scrap aluminum alloy is thrown out under the driving of the grinding knives and the action of centrifugal force, and is blocked due to the action of the seepage baffle plate, and then is discharged from the fan-shaped discharge hole.
The specific process is shown in fig. 5, and the working flow of the self-cleaning smooth surface stirring tool is as follows:
a) Before welding, fixing the stirring pin with the grinding knife and the static shaft shoulder with the fan-shaped discharge hole by using screws, and keeping a certain safety distance between the grinding knife and the inner plane of the static shaft shoulder and between the stirring pin and the side wall of the static shaft shoulder.
b) In the initial stage of welding, the stirring pin rotates downwards at a high speed, part of metal in the stirring area is extruded under the extrusion friction effect, and is extruded into the inside of the static shaft shoulder along the stirring pin and the inner wall of the static shaft shoulder.
c) The metal extruded into the static shaft shoulder is ground by a grinding cutter rotating at high speed, and small metal scraps are brought to the seepage baffle by the grinding cutter with an inclined angle.
d) And discharging small pieces of metal scraps from the discharge holes to finish welding real-time cleaning.
As described above, the three grinding knives, the seepage baffle and the fan-shaped discharge holes are cooperatively matched to reduce overflowing metal in the static shaft shoulder, and the grinding knives and the stirring head are combined, so that compared with the existing cleaning tool for discharging seepage, the cleaning tool is simpler and more convenient, the cleaning tool does not need to be frequently disassembled, the welding efficiency is improved, and the welding cleaning effect for metal materials with larger partial adhesiveness and poorer flowability is better.
Claims (8)
1. A self-cleaning smooth surface stirring tool for static shaft shoulder friction stir welding is characterized in that:
Included
a static shaft shoulder;
the static shaft shoulder is provided with a central hole, and an assembly gap is reserved between the static shaft shoulder central hole and the stirring head;
a fan-shaped discharge hole is formed in the static shaft shoulder, and a seepage baffle is arranged on one side of the fan-shaped discharge hole;
the stirring head passes through the central hole of the static shaft shoulder, and the bottom of the stirring head is provided with a stirring pin;
and three inclined grinding knives extend from the axial shoulder plane to the stirring pin;
the inclined grinding cutters are distributed at a certain inclined angle, and the bottoms of the inclined grinding cutters are semicircular; the central hole wall and the inner part of the static shaft shoulder are in circular arc transition through a circular angle.
2. A self-cleaning smooth surface stirring tool for static shoulder friction stir welding as recited in claim 1 wherein: the three inclined grinding cutters are distributed in a circumferential array at intervals of 120 degrees, when the rotation direction of the stirring head is clockwise, the inclination angle of the grinding cutters along the rotation direction is 135 degrees, and the other side is 45 degrees; when the rotation direction of the stirring head is anticlockwise, the inclination angle of the grinding cutter along the rotation direction is 45 degrees, the other side is 135 degrees, the length of the grinding cutter is 2mm, the width of the grinding cutter is 1mm, the height of the grinding cutter is 1mm, and the grinding cutter is semicircular.
3. A self-cleaning smooth surface stirring tool for static shoulder friction stir welding as recited in claim 1 wherein: the two cambered surface radiuses of the fan-shaped discharge hole are 10mm and 24mm respectively; the chord lengths of the two arc endpoints are 8mm and 20mm respectively.
4. A self-cleaning smooth surface stirring tool for static shoulder friction stir welding as recited in claim 1 wherein: titanium alloy is adopted as the material in the static shaft shoulder and the central hole wall, so that the adhesiveness of plastic metal in the hole wall or the static shaft shoulder is reduced.
5. A self-cleaning smooth surface stirring tool for static shoulder friction stir welding as recited in claim 1 wherein: the height of the seepage baffle plate is 3mm, the thickness is 1mm, and the length is consistent with the size of the fan-shaped discharge hole.
6. A self-cleaning smooth surface stirring tool for static shoulder friction stir welding as recited in claim 1 wherein: and a fastening screw is arranged to fix the static shaft shoulder and the stirring head.
7. A self-cleaning smooth surface stirring tool for static shoulder friction stir welding as recited in claim 1 wherein: one side of the fan-shaped discharge hole is fixed with a seepage baffle plate according to the rotation direction.
8. A self-cleaning smooth surface stirring method for static shoulder friction stir welding based on any one of claims 1-7, characterized in that a stirring tool is arranged, and the self-cleaning process of the seeping material is completed by utilizing the combined action of an assembly gap, an inclined grinding knife, a seeping material baffle plate and a fan-shaped discharge hole of the stirring tool, and overflowed metal adhered inside the static shoulder is cleaned while welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210571544.8A CN114888425B (en) | 2022-05-24 | 2022-05-24 | Self-cleaning smooth surface stirring tool for static shaft shoulder friction stir welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210571544.8A CN114888425B (en) | 2022-05-24 | 2022-05-24 | Self-cleaning smooth surface stirring tool for static shaft shoulder friction stir welding |
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| Publication Number | Publication Date |
|---|---|
| CN114888425A CN114888425A (en) | 2022-08-12 |
| CN114888425B true CN114888425B (en) | 2023-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210571544.8A Active CN114888425B (en) | 2022-05-24 | 2022-05-24 | Self-cleaning smooth surface stirring tool for static shaft shoulder friction stir welding |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116810045B (en) * | 2023-04-10 | 2024-03-15 | 北京科技大学 | Bar cutting discharging mechanism suitable for friction stir material adding device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107931822A (en) * | 2017-11-27 | 2018-04-20 | 南京理工大学 | The static shaft shoulder agitating friction weldering connection device and method of a kind of variable-angle corner joint |
| CN112025074A (en) * | 2020-07-27 | 2020-12-04 | 昆山哈工万洲焊接研究院有限公司 | Cutting tool, shaft shoulder combined structure, friction stir welding device and system |
| CN213969485U (en) * | 2020-10-13 | 2021-08-17 | 孚斯威焊接科技(上海)有限公司 | Static shaft shoulder friction stir welding device |
| CN214212572U (en) * | 2020-12-14 | 2021-09-17 | 苏州市哈工万洲自动化有限公司 | Welding tool and welding device for machining flow channel |
| CN114247980A (en) * | 2021-11-30 | 2022-03-29 | 广州瑞松威尔斯通智能装备有限公司 | Static shaft shoulder friction stir welding tool |
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2022
- 2022-05-24 CN CN202210571544.8A patent/CN114888425B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107931822A (en) * | 2017-11-27 | 2018-04-20 | 南京理工大学 | The static shaft shoulder agitating friction weldering connection device and method of a kind of variable-angle corner joint |
| CN112025074A (en) * | 2020-07-27 | 2020-12-04 | 昆山哈工万洲焊接研究院有限公司 | Cutting tool, shaft shoulder combined structure, friction stir welding device and system |
| CN213969485U (en) * | 2020-10-13 | 2021-08-17 | 孚斯威焊接科技(上海)有限公司 | Static shaft shoulder friction stir welding device |
| CN214212572U (en) * | 2020-12-14 | 2021-09-17 | 苏州市哈工万洲自动化有限公司 | Welding tool and welding device for machining flow channel |
| CN114247980A (en) * | 2021-11-30 | 2022-03-29 | 广州瑞松威尔斯通智能装备有限公司 | Static shaft shoulder friction stir welding tool |
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