CN211305187U - Rotary welding tool for friction welding - Google Patents
Rotary welding tool for friction welding Download PDFInfo
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- CN211305187U CN211305187U CN201921311636.2U CN201921311636U CN211305187U CN 211305187 U CN211305187 U CN 211305187U CN 201921311636 U CN201921311636 U CN 201921311636U CN 211305187 U CN211305187 U CN 211305187U
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Abstract
The utility model relates to a rotary welding tool for friction welding, which comprises a support body and a core material; the core material is arranged in the sleeve cavity at the lower part of the support body; the upper part of the support body is a knife handle, the center of the support body is provided with a through hole communicated with the cavity, and the axis of the through hole and the axis of the support body are the same; the welding is realized by rubbing a rotating welding tool on the surface of the workpiece, and the welding tool for realizing the friction welding method consists of a core material and a support body. The core material is a consumable material and is composed of a cylinder or a prism which is made of the same material as the material to be welded. One end of the support body is in a sleeve shape and is tightly matched with the core material; the other end is a common knife handle connected with the main shaft of the motor. The support is a non-consumable part, and the material strength of the support is higher than that of the material to be welded. Adopt the utility model discloses a rotatory soldering set utilizes butt joint, overlap joint and the spot welding of homogeneous material looks mutual friction to weld panel, no longer restricts the work piece of specific cross sectional shape. Compare with ordinary friction stir welding, the utility model discloses no longer need non-consumptive stirring tool as the soldering set, fundamentally has solved the easy wearing and tearing of stirring head and cracked difficult problem.
Description
Technical Field
The invention belongs to the technical field of welding, relates to a rotary welding tool for friction welding, and particularly relates to friction welding on the surface of a workpiece by using a welding tool made of the same material as the workpiece.
Background
Existing friction welding techniques typically utilize friction between a workpiece and a workpiece (e.g., spin friction welding and linear friction welding) or between a workpiece and a non-consumable tool inserted into the workpiece (e.g., friction stir welding) to generate heat, soften the material to be welded and form a plastic flow, thereby breaking the original interface to form an effective connection.
For the existing friction welding technology, limited by the process characteristics, the joints welded by the rotary friction welding and the linear friction welding are relatively single in form, and the rotary friction welding and the linear friction welding can only be used for welding workpieces with fixed section shapes generally, but the rotary friction welding and the linear friction welding have the advantage that the rotary friction welding and the linear friction welding are almost suitable for welding all materials capable of thermally deforming.
Friction stir welding is a relatively new friction welding technique that relies on a high speed rotating stirring tool inserted into the interior of a workpiece to produce heat by friction stir and soften the material to be welded to form a plastic flow. When the stirring tool rotating at a high speed moves along the joint to be welded, a good weld joint can be formed behind the stirring tool. Because the friction stir welding does not need to depend on the relative motion between workpieces, the friction stir welding is suitable for various complex joint forms such as flat plate butt joint, lap joint, angle joint, T-shaped joint, spot welding, cylinder circumferential seam, longitudinal seam and the like.
However, because of the need to frictionally generate heat by inserting a non-consumable stirring tool into a workpiece, the stirring tool must have a strength and wear resistance much higher than the material of the workpiece. This places high demands on the material from which the stirring tool is made. Currently, although friction stir welding has been applied to the industrial production of materials with lower strength and melting point, such as aluminum alloys, magnesium alloys, copper alloys, etc., there is still a risk of breakage of the stirring tool due to thermal fatigue when welding long straight welds. For iron-based, titanium-based and nickel-based alloys with high strength and high melting point, industrial application has not been realized at present because stirring tools are easily worn and broken.
Disclosure of Invention
Technical problem to be solved
In order to avoid the defects of the prior art, the invention provides a rotary welding tool for friction welding, which solves the problems that the welding head of the conventional rotary friction welding and linear friction welding has a single form, and a stirring tool for friction stir welding is easy to wear and break.
Technical scheme
A rotary welding tool for friction welding is characterized by comprising a support body 1 and a core material 2; the core material is arranged in the cavity of the sleeve 1-1 at the lower part of the support body; the upper part of the support body is provided with a knife handle 1-2, the center of the support body is provided with a through hole 1-3 communicated with the cavity, and the axis of the through hole 1-3 and the axis of the support body 1 are the same; the core material 2 is a cylinder or a prism, and the inner wall of the cavity at the lower part of the support body 1 is a circle matched with the cylinder core material or a polygon matched with the prism; the end 2-2 of the core material exceeds the end 1-4 of the support body by 0-3 mm; the core material is the same as the material to be welded; the material strength of the support body 1 is higher than that of a core material, namely a material to be welded; a cooling device is arranged on the outer side of the sleeve 1-1 at the lower part of the support body; the cooling device adopts a pipeline structure, and cooling liquid 5 is arranged in the pipeline.
And a second sleeve 1-1-1 made of superhard material is arranged outside the support body 1, is positioned in the middle of the support body 1 and is fixedly connected with the support body through an inner hexagonal stud.
When the core material 2 is in a cylindrical structure, the upper part of the side surface of the core material 2 is provided with a clamping surface 2-1, the side edge of the support body matched with the clamping surface 2-1 is provided with a through hole, and the core material is fixedly connected with the support body through the inner hexagonal stud 3.
The outer diameter of the core material is 3-10 times of the thickness of a workpiece to be welded.
The wall thickness of the sleeve 1-1 at the lower part of the support body is 1-2 mm.
Advantageous effects
The invention provides a rotary welding tool for friction welding, which realizes welding by rubbing a rotary welding tool on the surface of a workpiece. The core material is a consumable material and is composed of a cylinder or a prism which is made of the same material as the material to be welded. One end of the support body is in a sleeve shape and is tightly matched with the core material; the other end is a common knife handle connected with the main shaft of the motor. The support is a non-consumable part, and the material strength of the support is higher than that of the material to be welded.
By adopting the rotary welding tool, the butt joint, the lap joint and the spot welding of the plates are welded by utilizing mutual friction of homogeneous materials, and the rotary welding tool is not limited to workpieces with specific section shapes. Compared with the common friction stir welding, the invention does not need a non-consumable stirring tool as a welding tool any more, and fundamentally solves the difficult problems that the stirring head is easy to wear and break.
Drawings
FIG. 1 is a front view of a bonding tool and a workpiece during butt joint in a friction welding method disclosed in the present invention.
Fig. 2 is a planing view of a bonding tool with a cylindrical core material.
Fig. 3 is a planer view of the bonding tool with the cooling device attached.
FIG. 4 is a front view of the bonding tool and workpiece during lap and spot welding in the friction welding method disclosed herein.
Fig. 5 is a front view of a bonding tool with a core material in the shape of a regular octagonal prism.
FIG. 6 is a front view of a composite bonding tool for bonding refractory metals.
Detailed Description
The invention will now be further described with reference to the following examples and drawings:
the welding is realized by rubbing a rotating welding tool on the surface of the workpiece, and the welding tool for realizing the friction welding method consists of a core material and a support body. The core material is a consumable material and is composed of a cylinder or a prism which is made of the same material as the material to be welded. One end of the support body is in a sleeve shape and is tightly matched with the core material; the other end is a common knife handle connected with the main shaft of the motor. The support is a non-consumable part, and the material strength of the support is higher than that of the material to be welded. The core end is slightly 0-3 mm higher than the end of the support body.
During welding, the welding tool is slowly pressed to the surface of a workpiece to be welded at the rotating speed of 10-2000 rpm for generating heat by friction, and the pressing speed is 5-30 mm/min. And when the part of the core material higher than the support body is completely consumed and the support body is tightly contacted with the surface of the workpiece, moving the welding tool at a feeding speed of 10-500 mm/min for welding. Thus, the support body drives the core material to rotate, and the end part of the core material drives the workpiece material below the welding tool to flow, so that a rotary material vortex is formed below the welding tool. The eddy current moves along with the welding tool, so that a welding seam is formed at the position where the eddy current passes through, and material connection is realized.
The friction welding method can be used for joint forms such as spot welding, lapping, butt joint and the like. When the device is used for spot welding, the welding tool does not need to move.
The core material used in the welding method is made of a bar material which is the same as the material to be welded, and the outer diameter of the bar material is 3-10 times of the thickness of the workpiece to be welded. The smaller the thickness of the workpiece to be welded, the larger the factor. The wall thickness of the support body is 1-2 mm at one end where the support body and the core material are tightly matched with each other. The core material and the supporting body do not rotate relatively, and the torque can be transmitted to the core material through the supporting body. The friction welding method can weld plate with thickness of 0.5-6 mm. Weldable materials include, but are not limited to, aluminum alloys, magnesium alloys, copper alloys, titanium alloys, iron alloys, and nickel alloys.
Example 1 was carried out: the present embodiment will be described with reference to fig. 1 and 2. The present embodiment includes a support body 1, a core 2, a hexagon socket stud 3, and a workpiece 4 to be welded. The support body 1 consists of a sleeve 1-1, a knife handle 1-2 and a through hole 1-3 arranged in a central shaft of the knife handle. The upper end of the core material 2 is provided with a clamping surface 2-1. The core material 2 is tightly matched with the sleeve 1-1 and is fixed with the clamping surface 2-1 through the inner hexagonal stud 3. The through hole 1-3 in the knife handle 1-2 can be used for dismounting. The core material end 2-2 exceeds the support body end 1-4 by 0-3 mm. During welding, the support body 1 is connected with a main shaft of a welding machine through the tool shank 1-2. The welder spindle transmits torque to the core 2 through the support body 1. At the rotating speed of 10-2000 rpm, the end part 2-2 of the core material is slowly pressed to the surface of the workpiece 4, and the pressing speed is 5-30 mm/min. After the end part 2-2 of the core material is contacted with the surface of the workpiece 4, heat is generated by mutual friction, and meanwhile, the end part 2-2 of the core material is gradually worn due to friction. Until the end 1-4 of the support body is brought into close contact with the surface of the workpiece 4 (the end 1-4 of the support body is sunk 0-0.2 mm into the surface of the workpiece 4), the support body 1 is moved at a feed speed of 10-500 mm/min to effect welding.
Example 2 was carried out: the present embodiment will be described with reference to fig. 1 and 3. This embodiment differs from embodiment 1 in that the outside of the sleeve 1-1 is wrapped with a circulating coolant 5 to lower the temperature of the core 2 and maintain the transmission of torque from the core 2 to the workpiece 4. Other implementation steps are the same as those of embodiment 1.
Example 3 of implementation: this embodiment will be described with reference to fig. 4. This embodiment differs from embodiment 1 in that the joint forms of the workpieces 4-1 and 4-2 are lap joints. Other implementation steps are the same as those of embodiment 1.
Example 4 of implementation: this embodiment will be described with reference to fig. 4. This embodiment differs from embodiment 1 in that the joint forms of the workpieces 4-1 and 4-2 are lap joints. After the end part 1-4 of the support body is tightly contacted with the surface of the workpiece 4-1 (the end part 1-4 of the support body sinks into the surface of the workpiece 4-1 by 0-0.2 mm), the support body is kept for 0-15s, and then the support body is pulled upwards to finish spot welding. Other implementation steps are the same as those of embodiment 1.
Example 5 was carried out: this embodiment will be described with reference to fig. 5. The difference between the embodiment and the embodiment 1 is that the core material 2 is in an octagonal prism shape, the sleeve 1-1 is also in an octagonal prism shape (other polygonal prisms can be used), and the support body 1 directly transmits the torque to the core material 2 through shape matching, so that the fixation of the hexagon socket head stud is not needed. Other implementation steps are the same as those of embodiment 1.
Example 6 of implementation: this embodiment will be described with reference to fig. 6. The present embodiment is different from embodiment example 1 in that the support body 1 is a split structure for welding the high melting point metal material. The support body 1 consists of a sleeve 1-1 made of tool steel, a cutter handle 1-2, a through hole 1-3 and a second sleeve 1-1-1 made of superhard material (tungsten carbide, silicon nitride, tungsten-rhenium alloy and the like). The tool steel sleeve 1-1 and the superhard material sleeve 1-1-1 are fixed through an inner hexagonal stud and a clamping surface 1-1-2. Other implementation steps are the same as those in embodiment 5.
Claims (5)
1. A rotary welding tool for friction welding, characterized by comprising a support body (1) and a core material (2); the core material is arranged in the cavity of the sleeve (1-1) at the lower part of the support body; the upper part of the support body is provided with a knife handle (1-2), the center of the support body is provided with a through hole (1-3) communicated with the cavity, and the axis of the through hole (1-3) and the axis of the support body (1) are the same; the core material (2) is a cylinder or a prism, and the inner wall of the cavity at the lower part of the support body (1) is a circle matched with the cylinder core material or a polygon matched with the prism; the end part (2-2) of the core material exceeds the end part (1-4) of the support body by 0-3 mm; the core material is the same as the material to be welded; the material strength of the support body (1) is higher than that of a core material, namely a material to be welded; a cooling device is arranged outside the sleeve (1-1) at the lower part of the support body; the cooling device adopts a pipeline structure, and cooling liquid (5) is arranged in the pipeline.
2. The rotary bonding tool for friction welding according to claim 1, wherein: the support body (1) is externally provided with a second sleeve (1-1-1) which is positioned in the middle of the support body (1) and fixedly connected with the support body through an inner hexagonal stud.
3. A rotary bonding tool for friction welding according to claim 1 or 2, characterized in that: when the core material (2) is in a cylindrical structure, the upper part of the side surface of the core material (2) is provided with a clamping surface (2-1), the side edge of the support body matched with the clamping surface (2-1) is provided with a through hole, and the core material is fixedly connected with the support body through an inner hexagonal stud (3).
4. A rotary bonding tool for friction welding according to claim 1 or 2, characterized in that: the outer diameter of the core material is 3-10 times of the thickness of a workpiece to be welded.
5. A rotary bonding tool for friction welding according to claim 1 or 2, characterized in that: the wall thickness of the sleeve (1-1) at the lower part of the support body is 1-2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921311636.2U CN211305187U (en) | 2019-08-14 | 2019-08-14 | Rotary welding tool for friction welding |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921311636.2U CN211305187U (en) | 2019-08-14 | 2019-08-14 | Rotary welding tool for friction welding |
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| CN211305187U true CN211305187U (en) | 2020-08-21 |
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| CN201921311636.2U Active CN211305187U (en) | 2019-08-14 | 2019-08-14 | Rotary welding tool for friction welding |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114433994A (en) * | 2022-01-20 | 2022-05-06 | 东南大学 | Device and method for eliminating weak connection of friction stir welding root |
| CN115890241A (en) * | 2022-11-16 | 2023-04-04 | 哈尔滨工业大学 | Constraint type friction stud welding device and method for synchronous shape and performance control processing |
-
2019
- 2019-08-14 CN CN201921311636.2U patent/CN211305187U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114433994A (en) * | 2022-01-20 | 2022-05-06 | 东南大学 | Device and method for eliminating weak connection of friction stir welding root |
| CN114433994B (en) * | 2022-01-20 | 2024-03-26 | 东南大学 | Device and method for eliminating weak connection of friction stir welding root |
| CN115890241A (en) * | 2022-11-16 | 2023-04-04 | 哈尔滨工业大学 | Constraint type friction stud welding device and method for synchronous shape and performance control processing |
| CN115890241B (en) * | 2022-11-16 | 2023-08-18 | 哈尔滨工业大学 | Constrained friction stud welding device and method for synchronous shape control and performance control treatment |
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