CN111889874A - Stirring welding method for aluminum alloy and stainless steel - Google Patents
Stirring welding method for aluminum alloy and stainless steel Download PDFInfo
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- CN111889874A CN111889874A CN202010598231.2A CN202010598231A CN111889874A CN 111889874 A CN111889874 A CN 111889874A CN 202010598231 A CN202010598231 A CN 202010598231A CN 111889874 A CN111889874 A CN 111889874A
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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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- 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
- B23K20/26—Auxiliary equipment
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Abstract
The invention relates to the field of welding processes, in particular to a stirring welding method of aluminum alloy and stainless steel. The stir welding device comprises a first stir welding mechanism and a second stir welding mechanism, the first stir welding mechanism is provided with a first stir welding head, the second stir welding mechanism is provided with a second stir welding head, and the first stir welding mechanism and the second stir welding mechanism are respectively driven to move towards a welding seam when the stir welding device works. Carry out stir welding to the accepting part and the pre-buried portion of pre-buried welding respectively through setting up first stirring bonding tool and second stirring head, make the accepting part intensification through first stirring bonding tool screw in overlap joint accepting part on treating the welded stainless steel earlier, and the heat preheats the welded stainless steel from this, owing to treat the welded stainless steel and carried out preheating treatment in advance, so can make treat the welded stainless steel can with treat the welded aluminum alloy and reach the thermoplasticity state simultaneously, can guarantee from this that the welding seam that forms is more level and more smooth after the stir welding is accomplished, connection performance is better.
Description
Technical Field
The invention relates to the field of welding processes, in particular to a stirring welding method of aluminum alloy and stainless steel.
Background
The raw aluminum is generally called electrolytic aluminum in market supply, and is a raw material for producing aluminum materials and aluminum alloy materials. The aluminum is a metal with low strength and good plasticity, and is prepared into an alloy for improving the strength or the comprehensive performance except for applying partial pure aluminum. The structure and performance of the aluminum can be changed by adding an alloy element into the aluminum, and the aluminum alloy is suitable for being used as various processing materials or casting parts. The alloy elements which are often added are copper, magnesium, zinc and silicon.
Stainless Steel (Stainless Steel) is short for Stainless acid-resistant Steel, and Steel which is resistant to weak corrosive media such as air, steam and water or has Stainless property is called Stainless Steel; and steel grades that are resistant to corrosion by chemically corrosive media (chemical attacks such as acids, bases, salts, etc.) are called acid-resistant steels.
Stainless steel and aluminum alloys generally have differences in machinability and thermal properties. Aluminum is quite flexible and easy to cut and shape. While the wear resistance and the high temperature resistance of the stainless steel are more outstanding. Stainless steel is harder than aluminum and more difficult to form. Stainless steel can be used at much higher temperatures than aluminum, which can become very flexible above about 400 degrees.
On the premise that the aluminum alloy and the stainless steel are greatly different from each other, if the welding of the aluminum alloy and the stainless steel is to be realized, the existing stir welding technology can cause the aluminum to deform preferentially to the stainless steel, the aluminum alloy side is greatly damaged during machining due to different softening degrees of the aluminum alloy and the stainless steel, and a smooth welding line is difficult to form. The overall strength of the welded part is insufficient.
Disclosure of Invention
In view of the above, the present invention aims to provide a stir welding method for aluminum alloy and stainless steel, so as to solve the above problems.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a stirring welding method of aluminum alloy and stainless steel is used for welding a welding seam formed between the aluminum alloy to be welded and the stainless steel to be welded,
providing a stir welding device, wherein the stir welding device comprises a first stir welding mechanism and a second stir welding mechanism, the first stir welding mechanism is provided with a first stir welding head, the second stir welding mechanism is provided with a second stir welding head, the stir welding device drives the first stir welding mechanism and the second stir welding mechanism to move towards the weld joint when working, the first stir welding mechanism drives the first stir welding head to rotate, and the second stir welding mechanism drives the second stir welding head to rotate;
the stirring welding method specifically comprises a welding sub-strategy, wherein the welding sub-strategy provides an embedded welding part, the embedded welding part is made of an aluminum alloy material, the embedded welding part comprises an embedded part and a bearing part, and the welding sub-strategy comprises the following steps:
a pre-installation step, inserting the pre-embedded part of the pre-embedded welding part into the welding line, and simultaneously attaching the part of the bearing part to the upper surface of the stainless steel to be welded;
a pre-welding step, wherein the embedded welding part is subjected to stir welding through a first stirring welding head of a first stirring mechanism, and the first stirring welding head is always positioned above the stainless steel to be welded when the first stirring welding head is subjected to stir welding;
and in the actual welding step, performing stir welding on the welding line through a second stirring welding head of a second stirring mechanism, wherein the second stirring welding head is always positioned above the welding line when performing the stir welding.
In the invention, further, the embedded welding part and the aluminum alloy to be welded are made of the same material.
In the present invention, further, a preheating sub-strategy is further included, where the preheating sub-strategy includes heating the embedded weldment to a first temperature range.
In the present invention, further, the first temperature range is between 130 degrees celsius and 200 degrees celsius.
In the invention, further, the embedded weldment receiving part has a first thickness value, the first thickness value is smaller than 4 mm, the first stirring mechanism is configured with a first control strategy in the pre-welding step, the first control strategy includes a first abdicating step and a first welding advancing step, the first abdicating step controls the first stirring welding head to move away from the to-be-welded stainless steel so that a first distancing distance is provided between the first stirring welding head and the to-be-welded stainless steel, the first distancing distance is greater than 4 mm, the first welding advancing step includes controlling the first stirring welding head to move close to the to-be-welded stainless steel so that a first penetration distance is provided between the first stirring welding head and the to-be-welded stainless steel, and the first penetration distance is smaller than 2 mm.
In the present invention, further, in the actual welding step, the second stirring mechanism is configured with a second control strategy, the second control strategy includes a second abdicating step and a second welding step, the second abdicating step controls the second stirring welding head to move away from the to-be-welded stainless steel so as to have a second distancing distance between the second stirring welding head and the weld, the second distancing distance is greater than 1 mm, the second welding step includes controlling the second stirring welding head to move close to the to-be-welded stainless steel so as to press the second stirring welding head into the weld by a second pressing distance, and the second pressing distance is greater than 1 mm.
In the invention, further, a plurality of pre-embedded welding pieces are arranged, and in the pre-installation step, the yielding gap distance formed between the pre-embedded welding pieces is equal when the pre-embedded welding pieces are inserted into the welding line.
In the invention, further, when the first stirring welding head leaves the embedded welding part and enters the abdicating gap, the first abdicating step is executed; and executing the first welding advancing step when the first stirring welding head leaves the abdicating gap and enters the embedded welding part.
In the invention, further, a plurality of pre-embedded welding pieces are arranged, and in the pre-installation step, the yielding gap distance formed between the pre-embedded welding pieces is equal when the pre-embedded welding pieces are inserted into the welding line.
In the invention, further, when the second stirring welding head leaves the embedded welding part and enters the abdicating gap, the second abdicating step is executed; and executing the second welding advancing step when the second stirring welding head leaves the abdicating gap and enters the embedded welding part.
The technical effects of the invention are mainly reflected in the following aspects:
carry out stir welding to the accepting part and the pre-buried portion of pre-buried welding respectively through setting up first stir welding head and second stir head, make the accepting part intensification through first stir welding head screw in overlap joint treating the accepting part on welding the stainless steel, and the stainless steel of treating welding is preheated through the heat that the friction produced between accepting part and the first stir welding head, then rethread second stir head stirs the welding seam and welds, owing to treat to weld the stainless steel and carried out preheating process in advance, so treat when second stir head stirs the welding seam and weld the stainless steel can with treat to weld the aluminum alloy and reach the thermoplastic state simultaneously and soften, can guarantee from this that it is more level and more smooth to form the welding seam after stir welding accomplishes, connection performance is better.
Drawings
FIG. 1: the invention is a schematic diagram of the overall connection structure of all parts in a welding state;
FIG. 2: the invention discloses a schematic placing diagram of an embedded part and each stirring head;
FIG. 3: a schematic plan view of a welding state in the present invention;
FIG. 4: the invention discloses a cutting schematic diagram of a welding state;
in the figure: 1. a first stirring horn; 2. a second stirring welding head; 3. pre-burying a welding part; 31. a receiving part; 32. a pre-embedding part; 4. a gap; 5. stainless steel to be welded; 6. welding seams; 7. an aluminum alloy is to be welded.
Detailed Description
The following detailed description of the embodiments of the present invention is provided in order to make the technical solution of the present invention easier to understand and understand.
A stirring welding method of aluminum alloy and stainless steel is used for welding a welding seam 6 formed between an aluminum alloy 7 to be welded and a stainless steel 5 to be welded,
as shown in fig. 1 to 4, a stir welding device is provided, and the stir welding device includes a first stir welding mechanism and a second stir welding mechanism, the first stir welding mechanism is provided with a first stir welding head 1, the second stir welding mechanism is provided with a second stir welding head 2, when the stir welding device works, the first stir welding mechanism and the second stir welding mechanism are respectively driven to move towards the weld joint 6, the first stir welding mechanism drives the first stir welding head 1 to rotate, and the second stir welding mechanism drives the second stir welding head 2 to rotate; the stirring device can be used for setting two groups of existing stirring welding machines, a group of stirring welding heads are arranged on each group of welding machines, the two groups of stirring welding heads are respectively controlled by the two groups of stirring welding machines to carry out welding operation, meanwhile, the stirring welding machines can also be set as a group of stirring welding machines, at least two groups of stirring welding heads which independently operate are arranged on the stirring welding machines, and independent welding operation is carried out on each stirring welding head according to an input preset control program.
The stirring welding method specifically comprises a welding sub-strategy, wherein the welding sub-strategy provides a pre-buried welding part 3, the pre-buried welding part 3 is made of an aluminum alloy material, the aluminum alloy material can easily reach the softening temperature, so that the stainless steel 5 to be welded can be preheated, and the aluminum alloy can be stirred and welded more easily and efficiently, so that the pre-buried welding part 3 is made of the aluminum alloy material. The embedded welding part 3 comprises an embedded part 32 and a bearing part 31, the embedded part 32 is arranged in a welding seam 6 in a penetrating mode, the bearing part 31 is lapped on the surface of stainless steel 5 to be welded, an L shape is formed between the embedded part 32 and the bearing part 31 in an integrated mode, the cross section of the embedded part 32 is matched with the cross section of the welding seam 6, and the welding sub-strategy comprises the following steps:
and a pre-installation step, namely inserting the pre-embedded part 32 of the pre-embedded welding part 3 into the welding seam 6 and clamping the pre-embedded part 32 through the clamping force between the two groups of parts to be welded so as to prevent the bearing part 31 from displacing when stirring welding is carried out in the later period. Simultaneously, the part of the bearing part 31 is jointed with the upper surface of the stainless steel 5 to be welded;
a pre-welding step, wherein the embedded welding part 3 is subjected to stir welding through a first stirring welding head 1 of a first stirring mechanism, and the first stirring welding head 1 is always positioned above the stainless steel 5 to be welded during the stir welding; the socket 31 of the embedded welding part 3 is subjected to friction stir welding through the first stir welding head 1, and the aluminum alloy of the socket 31 reaches a thermoplastic state through frictional heat generation between the first stir welding head 1 and the socket 31, and even the temperature can be continuously raised until the aluminum alloy reaches a partially molten state. Thereby rapidly heating up and preheating the stainless steel 5 to be welded through the temperature. In the process, the first stirring welding head 1 is required to be kept above the upper surface of the stainless steel 5 to be welded all the time, and the first stirring welding head 1 is prevented from scratching and damaging the upper surface of the stainless steel 5 to be welded, so that the quality of the second stirring welding head 2 during welding of the stainless steel 5 to be welded and the aluminum alloy 7 to be welded is influenced.
And in the actual welding step, the welding seam 6 is subjected to stir welding through a second stirring welding head 2 of a second stirring mechanism, and the second stirring welding head 2 is always positioned above the welding seam 6 during the stir welding. And the second stirring welding head performs stirring welding operation on the welding seam 6, the stainless steel 5 to be welded which is preheated by the first stirring welding head is welded together with the aluminum alloy 7 to be welded on the other side, and the stainless steel 5 to be welded and the aluminum alloy 7 to be welded can simultaneously reach a thermoplastic state when the second stirring welding head 2 performs stirring welding because the stainless steel 5 to be welded is preheated, so that the aluminum alloy 7 to be welded and the stainless steel 5 to be welded which are simultaneously in the thermoplastic state are mutually fused under the stirring of a stirring needle, and the welding seam 6 is formed after the second stirring welding head 2 performs forging and pressing.
The embedded welding piece 3 is the same as the aluminum alloy 7 to be welded in material. This setting can guarantee not to join in the third kind of material when welding of treating welded stainless steel 5 and treating welded aluminum alloy 7 to because the softening temperature of aluminum alloy is low, be convenient for more use as preheating material.
The pre-heating sub-strategy comprises the step of heating the embedded welding part 3 to a first temperature range. The first temperature range is 130-200 ℃. The pre-buried welding piece 3 can be heated to 130-200 ℃ in advance by the aluminum alloy heating furnace or the heater, so that the temperature of the bearing part 31 can be increased more quickly by the first stirring welding head 1, the preheating speed of the stainless steel 5 to be welded is increased, and the overall welding efficiency is improved.
As shown in fig. 4, the carrying portion 31 of the embedded weldment 3 has a first thickness value, the first thickness value is smaller than 4 mm, the first stirring mechanism configures a first control strategy in the pre-welding step, the first control strategy includes a first yielding step and a first welding advancing step, the first yielding step controls the first stirring welding head 1 to move away from the to-be-welded stainless steel 5 so as to enable a first distance between the first stirring welding head 1 and the to-be-welded stainless steel 5 to be kept, the first distance is larger than 4 mm, the yielding step is to keep the initial position of the first stirring welding head 1 above the carrying portion 31 every time the carrying portion 31 is welded by the first stirring welding head 1, the first welding advancing step includes controlling the first stirring welding head 1 to move close to the to-be-welded stainless steel 5 so as to enable a first distance between the first stirring welding head 1 and the to-be-welded stainless steel 5 to be kept, the first bite distance is less than 2 millimeters. The first penetration distance is the distance that the end of the stirring pin penetrates into the receiving part 31, and at the same time, the first penetration distance needs to ensure that the end of the stirring pin does not contact with the upper surface of the stainless steel 5 to be welded, so that the stirring pin can be prevented from scratching the surface of the stainless steel 5 to be welded. In addition, the shaft shoulder of the stirring head is always contacted with the upper surface of the bearing part 31 so as to ensure that the shaft shoulder can rub against each other to generate heat. When the first stirring welding head 1 leaves the embedded welding part 3 and enters the abdicating gap 4, executing the first abdicating step; and when the first stirring welding head 1 leaves the abdicating gap 4 and enters the embedded welding part 3, executing the first welding step.
As shown in fig. 1 and 3, the first control strategy is set because a plurality of groups of pre-buried weld assemblies 3 need to be set during welding of a long weld 6, and when a plurality of groups of pre-buried weld assemblies 3 are inserted into the weld 6 in the pre-installation step, yielding gaps 4 with equal intervals are formed between the pre-buried weld assemblies 3. Therefore, in the stir welding process in which after one set of the sockets 31 is welded by the first stir welding head 1, the first stir welding head 1 enters the next set of sockets 31 through the gap 4, in order to ensure that the sockets 31 do not displace due to the extrusion of the first stir welding head 1, the first stir welding head 1 needs to execute the first control strategy to make the first stir welding head 1 gradually press down and penetrate into the sockets 31 from right above the sockets 31 each time the first stir welding head 1 welds the sockets 31.
As shown in fig. 4, in the actual welding step, the second stirring mechanism is configured with a second control strategy, the second control strategy includes a second abdicating step and a second welding advancing step, the second abdicating step controls the second stirring welding head 2 to move away from the to-be-welded stainless steel 5 so as to enable a second distancing distance to be provided between the second stirring welding head 2 and the welding seam 6, the second distancing distance is greater than 1 mm, where 1 mm is 1 mm of the stirring pin away from the upper surface of the to-be-welded stainless steel 5, the second welding advancing step includes controlling the second stirring welding head 2 to move close to the to-be-welded stainless steel 5 so as to enable the second stirring welding head 2 to press into the welding seam 6 by a second pressing distance, and the second pressing distance is greater than 1 mm. When the second stirring welding head 2 leaves the embedded welding part 3 and enters the abdicating gap 4, executing the second abdicating step; and when the second stirring welding head 2 leaves the abdicating gap 4 and enters the embedded welding part 3, executing the second welding step. The second control strategy is also set because the embedded welding pieces 3 are set into a plurality of groups, so as to avoid the displacement of the embedded welding pieces 3 caused by extrusion when the second stirring welding head 2 is used for welding. The setting of this strategy is the same as the setting objective of the first control strategy of the first stirring horn 1. Although the gaps 4 exist between the embedded welding members 3, the embedded welding members 3 expand to a certain volume after being heated and softened, so that the gaps 4 are filled to form complete welding seams 6.
Meanwhile, a certain first distance needs to be kept between the first stirring welding head 1 and the second stirring welding head 2, the first distance is calculated by the length along the direction of the welding seam 6, and the first distance is set to be 5-10 cm, so that the temperature of the to-be-welded stainless steel 5 which is preheated during the processing of the second stirring welding head 2 can be kept at a higher level. Alternatively, the time interval between the first and second welding tools 1 and 2 before and after the same region is processed may be 10 to 20 seconds.
The specific working principle is as follows:
firstly, a plurality of groups of embedded weldments 3 are arranged in welding seams 6 of workpieces of stainless steel 5 to be welded and aluminum alloy 7 to be welded at equal intervals, and then the embedded weldments 3 and two groups of materials to be welded are fixedly clamped through a clamp.
And then, respectively starting the first stirring mechanism and the second stirring mechanism to stir and weld the embedded welding piece 3 and the welding seam 6.
After the welding is finished, impurities on the surface of the welding line 6 can be removed according to requirements, so that the flatness of the surface of the welding line 6 is guaranteed.
The above are only typical examples of the present invention, and besides, the present invention may have other embodiments, and all the technical solutions formed by equivalent substitutions or equivalent changes are within the scope of the present invention as claimed.
Claims (10)
1. A stirring welding method of aluminum alloy and stainless steel is used for welding a welding seam (6) formed between an aluminum alloy (7) to be welded and the stainless steel (5) to be welded,
providing a stir welding device, wherein the stir welding device comprises a first stir welding mechanism and a second stir welding mechanism, the first stir welding mechanism is provided with a first stir welding head (1), the second stir welding mechanism is provided with a second stir welding head (2), the stir welding device respectively drives the first stir welding mechanism and the second stir welding mechanism to move towards the welding seam (6) when working, the first stir welding mechanism drives the first stir welding head (1) to rotate, and the second stir welding mechanism drives the second stir welding head (2) to rotate;
the stirring welding method specifically comprises a welding sub-strategy, wherein the welding sub-strategy provides an embedded welding part (3), the embedded welding part (3) is made of an aluminum alloy material, the embedded welding part (3) comprises an embedded part (32) and a bearing part (31), and the welding sub-strategy comprises the following steps:
a pre-installation step, inserting an embedded part (32) of the embedded welding part (3) into the welding seam (6) and simultaneously enabling the part of the bearing part (31) to be attached to the upper surface of the stainless steel (5) to be welded;
a pre-welding step, wherein the embedded welding part (3) is subjected to stirring welding through a first stirring welding head (1) of a first stirring mechanism, and the first stirring welding head (1) is always positioned above the stainless steel (5) to be welded during stirring welding;
and in the actual welding step, the welding seam (6) is subjected to stirring welding through a second stirring welding head (2) of a second stirring mechanism, and the second stirring welding head (2) is always positioned above the welding seam (6) during stirring welding.
2. A stir welding method of aluminum alloy and stainless steel according to claim 1, wherein the embedded weldment (3) is made of the same material as the aluminum alloy (7) to be welded.
3. A stir welding method of aluminium alloy and stainless steel according to claim 1, further comprising a pre-heat sub-strategy comprising heating the pre-buried weld (3) to a first temperature range.
4. A method of stir welding an aluminum alloy and stainless steel as recited in claim 3, wherein said first temperature range is between 130 degrees celsius and 200 degrees celsius.
5. The stir welding method of one of aluminum alloy and stainless steel according to claim 1, wherein the receiving portion (31) of the embedded weldment (3) has a first thickness value, the first thickness value is less than 4 mm, the first stirring mechanism configures a first control strategy in the pre-welding step, the first control strategy comprises a first abdicating step and a first welding step, the first abdicating step controls the first stirring horn (1) to move away from the stainless steel to be welded (5) so as to have a first distancing distance between the first stirring horn (1) and the stainless steel to be welded (5), the first distancing distance is greater than 4 mm, the first welding step comprises controlling the first stirring horn (1) to move close to the stainless steel to be welded (5) so as to have a first feeding distance between the first stirring horn (1) and the stainless steel to be welded (5), the first bite distance is less than 2 millimeters.
6. The stir welding method of an aluminum alloy and a stainless steel according to claim 1, wherein the second stirring mechanism is configured with a second control strategy in the real welding step, the second control strategy comprises a second yield step and a second advance step, the second yield step controls the second stirring horn (2) to move away from the stainless steel to be welded (5) so as to enable a second distance between the second stirring horn (2) and the weld (6), the second distance is greater than 1 mm, and the second advance step comprises controlling the second stirring horn (2) to move close to the stainless steel to be welded (5) so as to enable the second stirring horn (2) to press into the weld (6) by a second pressing distance, the second pressing distance is greater than 1 mm.
7. The stir welding method of an aluminum alloy and a stainless steel according to claim 5, wherein the pre-embedded welding members (3) are provided in plurality, and the pre-installation step further comprises the step of making the distance of the abdicating gaps (4) formed between the pre-embedded welding members (3) equal when the pre-embedded welding members (3) are inserted into the weld (6).
8. The stir welding method of an aluminum alloy and a stainless steel according to claim 7, wherein the first abdicating step is performed when the first stir welding head (1) leaves the embedded weldment (3) and enters the abdicating gap (4); and when the first stirring welding head (1) leaves the abdicating gap (4) and enters the embedded welding part (3), executing the first welding step.
9. The stir welding method of an aluminum alloy and a stainless steel according to claim 6, wherein the number of the embedded welding members (3) is plural, and the pre-installation step further comprises the step of making the distance of the abdicating gaps (4) formed between the embedded welding members (3) equal when the embedded welding members (3) are inserted into the weld (6).
10. The stir welding method of an aluminum alloy and a stainless steel according to claim 9, wherein the second abdicating step is performed when the second stir welding head (2) leaves the embedded weldment (3) and enters the abdicating gap (4); and when the second stirring welding head (2) leaves the abdicating gap (4) and enters the embedded welding part (3), executing the second welding step.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115502542A (en) * | 2022-11-01 | 2022-12-23 | 中国科学院金属研究所 | Method for eliminating hook-shaped defect of aluminum alloy friction stir lap welding joint |
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| CN209830594U (en) * | 2018-12-30 | 2019-12-24 | 东莞材料基因高等理工研究院 | Double-end friction stir welding device |
| CN110860781A (en) * | 2019-11-21 | 2020-03-06 | 东北大学秦皇岛分校 | Auxiliary heat source welding method for double-spindle friction stir welding |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115502542A (en) * | 2022-11-01 | 2022-12-23 | 中国科学院金属研究所 | Method for eliminating hook-shaped defect of aluminum alloy friction stir lap welding joint |
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