CN108274110B - Variable-rotating-speed backfill type friction stir spot welding method - Google Patents
Variable-rotating-speed backfill type friction stir spot welding method Download PDFInfo
- Publication number
- CN108274110B CN108274110B CN201810381962.4A CN201810381962A CN108274110B CN 108274110 B CN108274110 B CN 108274110B CN 201810381962 A CN201810381962 A CN 201810381962A CN 108274110 B CN108274110 B CN 108274110B
- Authority
- CN
- China
- Prior art keywords
- speed
- omega
- stirring
- sleeve
- rotation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The invention provides a variable-rotating-speed backfill type friction stir spot welding method, and relates to the technical field of friction spot welding. The method comprises the following steps: fixing and preheating a workpiece, clamping the welded plate by a welding tool, and preheating the welded plate by rotating a stirring sleeve and a stirring pin; in the high-rotation-speed pricking stage, the stirring sleeve pricks the welded plate at a higher rotation speed, so that the workpiece obtains enough heat input; in the low-rotation-speed pricking stage, pricking the welded plate by the stirring sleeve at a low rotation speed, and controlling the rise of the welding temperature; in the low-rotation-speed backfilling stage, the stirring sleeve is pumped back upwards at a lower rotation speed, and the welding temperature is controlled to rise; in the high-rotating-speed backfilling stage, the stirring sleeve is upwards pumped at a higher rotating speed, so that the workpiece obtains enough heat input to obtain good welding spot forming; after welding is finished, the method can effectively avoid local melting of materials in the backfill type friction stir spot welding process of the high-strength aluminum alloy, and simultaneously obtains good welding spot forming, thereby improving the corrosion resistance and the mechanical property of the joint.
Description
Technical Field
the invention relates to the technical field of friction spot welding, in particular to a variable-rotating-speed backfill type friction stir spot welding method.
Background
The backfill friction stir spot welding (RFSSW) is a new single point connection technology. The technology heats and plasticizes the welded plates through the rotational friction of the stirring head, and enables the lap joint interface to be broken and form metallurgical bonding under the stirring action of the stirring head. Because the metal is not melted in the welding process, the welding method is particularly suitable for welding low-melting-point metal such as aluminum alloy and the like.
The combined welding tool used in the technology consists of a compression ring, a stirring sleeve and a stirring pin which are coaxially arranged. The welding process is divided into two stages of rolling and backfilling: in the downward pricking stage, the stirring sleeve is rotatably pricked into the welded plate, the stirring pin is rotatably withdrawn, and the plastic metal is extruded into a cavity of the stirring sleeve; in the backfilling stage, the stirring sleeve rotates and retracts, the stirring pin rotates and punctures downwards, and the plastic metal in the cavity of the stirring sleeve is backfilled to the welding point. The rotating speed of the stirring sleeve and the stirring pin is constant in the whole welding process, so that the traditional backfill type friction stir spot welding can be called as constant rotating speed backfill type friction stir spot welding.
Although back-filled friction stir spot welding is considered a solid phase joining technique, when welding high strength aluminum alloys (2xxx, 7xxx series aluminum alloys), local melting is highly likely to occur near grain boundaries due to the low initial melting temperature of the material. The occurrence of this phenomenon forms eutectic structures and liquation cracks inside the welded joint, which greatly deteriorates the corrosion resistance and mechanical properties of the joint. Although the traditional constant-rotating-speed backfill type friction stir spot welding method can reduce the welding heat input by reducing the rotating speed of the stirring sleeve and the stirring pin so as to control the welding peak temperature to be lower than the initial melting temperature of the material, the welding point is often poorly formed due to insufficient welding heat input. That is, the traditional constant-speed backfill type friction stir spot welding forms a contradiction between controlling the welding peak temperature and ensuring the welding spot to be formed, which is difficult to be coordinated.
disclosure of Invention
the invention aims to provide a variable-rotating-speed backfill type friction stir spot welding method, which not only can control the welding peak temperature below the initial melting temperature of a material, but also can ensure that a workpiece obtains enough welding heat input to realize good welding spot forming.
the invention is realized by the following steps:
a variable-speed backfill type friction stir spot welding method comprises the following steps:
fixing and preheating a workpiece, namely closely attaching the lower surface of a compression ring to the upper surface of a welded plate, enabling the lower surfaces of a stirring sleeve and a stirring pin to be positioned on the same horizontal plane with the lower surface of the compression ring, and enabling the stirring sleeve and the stirring pin to start rotating at the rotating speed of omega 0 to preheat the surface of the welded workpiece;
A high-speed inserting stage, namely, increasing the rotating speed of the stirring sleeve and the stirring pin from omega 0 to omega 1, inserting the stirring sleeve into the welded plate downwards to a depth P 1 at a speed V 1, drawing the stirring pin back upwards at a speed V 2, and changing V 2 to (D 1 2 -D 2 2) V 1/D 2 2, wherein D 1 is the diameter of the stirring sleeve, and D 2 is the diameter of the stirring pin;
a low-speed inserting stage, namely reducing the rotating speed of the stirring sleeve and the stirring pin from omega 1 to omega 2, inserting the stirring sleeve into the welded plate downwards at a speed V 1 to a depth P 2, and drawing the stirring pin back upwards at a speed V 2;
A low-speed backfilling stage, namely adjusting the rotating speed of the stirring sleeve and the stirring pin from omega 2 to omega 3, wherein omega 3 is less than omega 1, drawing the stirring sleeve back upwards to a position with a depth P 3 away from the upper surface of the welded plate at a speed V 1, and pressing the stirring pin downwards at a speed V 2;
Adjusting the rotation speed of the stirring sleeve and the stirring pin from omega 3 to omega 4, wherein omega 4 is more than omega 2 and omega 4 is more than omega 3, drawing the stirring sleeve back upwards to the upper surface of the welded plate at a speed V 1, and pressing the stirring pin downwards at a speed V 2 until the lower surface of the stirring pin and the lower surface of the stirring sleeve are positioned on the same horizontal plane;
And (3) a workpiece leaving stage after welding: and stopping rotating the stirring sleeve and the stirring pin, and drawing the stirring sleeve and the stirring pin away from the surface of the welded plate.
further, in the preferred embodiment of the present invention, the rotation speed ω 0 of the stirring sleeve and the stirring pin is 500-1500 rpm in the workpiece fixing and preheating steps.
Further, in the preferred embodiment of the present invention, during the high speed insertion stage, the rotational speed of the stirring sleeve and the stirring pin is increased from ω 0 to ω 1, ω 1 is 1500-5000 rpm.
further, in the preferred embodiment of the present invention, during the high speed penetration phase, the rotational speed of the stirring sleeve and the stirring pin is increased from ω 0 to ω 1, ω 1 is 2000 rpm.
Further, in the preferred embodiment of the present invention, during the low speed insertion stage, the rotational speed of the stirring sleeve and the stirring pin is reduced from ω 1 to ω 2, ω 2 is 800-3000 rpm, and ω 2 < ω 1.
further, in the preferred embodiment of the present invention, during the low speed penetration phase, the rotational speed of the stirring sleeve and the stirring pin is reduced from ω 1 to ω 2, ω 2 is 1000 rpm.
Further, in the preferred embodiment of the present invention, during the low speed backfill stage, the rotation speed of the stirring sleeve and the stirring pin is adjusted from ω 2 to ω 3, and ω 3 < ω 1, ω 3 is 800-3000 rpm.
Further, in the preferred embodiment of the present invention, during the low speed backfill stage, the rotation speed of the stirring sleeve and the stirring pin is adjusted from ω 2 to ω 3, and ω 3 is 1200 rpm.
Further, in the preferred embodiment of the present invention, during the high rotation speed backfill stage, the rotation speed of the stirring sleeve and the stirring pin is adjusted from ω 3 to ω 4, and ω 4 > ω 2 and ω 4 > ω 3, and ω 4 is 1500-5000 rpm.
Further, in the preferred embodiment of the present invention, during the high speed backfill stage, the rotation speed of the stirring sleeve and the stirring pin is adjusted from ω 3 to ω 4, and ω 4 > ω 2 and ω 4 > ω 3, and ω 4 is 1500 rpm.
the beneficial effect of above-mentioned scheme:
The invention provides a variable-rotating-speed backfill type friction stir spot welding method which mainly comprises a workpiece fixing and preheating stage, a high-rotating-speed inserting stage, a low-rotating-speed backfilling stage, a high-rotating-speed backfilling stage and a welding finished workpiece leaving stage. The design of the stages enables the variable-rotating-speed backfill type friction stir spot welding method provided by the invention to adopt the variable rotating speed of the stirring sleeve and the stirring pin to accurately control the welding heat input in the welding process. The relatively high rotational speed is used in the initial stage of soldering, and when sufficient heat input is obtained by the solder to ensure good solder joint formation, the rotational speed is reduced to suppress the rise of soldering temperature. Therefore, the forming of the welding spot is ensured, the welding peak temperature can be reduced to be lower than the initial melting temperature of the material, and the welded material is prevented from being locally melted. Thereby enhancing the corrosion resistance and the mechanical property of the joint.
In conclusion, the method can not only control the welding peak temperature below the initial melting temperature of the material, but also ensure that the workpiece obtains enough welding heat input to realize good welding spot forming.
drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic cross-sectional view of a welding tool and a welded plate in a workpiece fixing and preheating step of a variable-speed backfill type friction stir spot welding method according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a welding tool and a welded plate in a high-speed penetration phase of a variable-speed backfill type friction stir spot welding method according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a welding tool and a welded plate in a low-speed penetration phase of a variable-speed backfill type friction stir spot welding method according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of a welding tool and a welded plate in a low-speed backfill stage of a variable-speed backfill type friction stir spot welding method according to an embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view of a welding tool and a welded plate in a high-speed backfilling stage of a variable-speed backfilling type friction stir spot welding method according to an embodiment of the present invention;
FIG. 6 is a schematic cross-sectional view of a welding tool and a welded plate during a welding-completed workpiece leaving stage of a variable-speed backfill type friction stir spot welding method according to an embodiment of the present invention;
FIG. 7 is a cross-sectional macro-topography of an aluminum alloy friction stir spot weld joint with generation of liquation cracks and intergranular eutectic phases obtained by a prior art friction spot welding method;
fig. 8 is a macroscopic view of a cross section of an aluminum alloy friction stir spot welding joint without generating a liquefied crack and an intergranular eutectic phase obtained by the variable-rotation-speed backfill type friction stir spot welding method according to the embodiment of the invention.
icon: 1-a compression ring; 2-stirring sleeve; 3-a stirring pin; 4-welded plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
it should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are usually placed in when used, and are only used for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
in the description of the embodiments of the present invention, it should be further noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
Referring to fig. 1 to 6, the present embodiment provides a variable-speed backfill type friction stir spot welding method, including:
fixing and preheating a workpiece, namely tightly attaching the lower surface of a compression ring 1 to the upper surface of a welded plate 4, enabling the lower surfaces of a stirring sleeve 2 and a stirring pin 3 to be positioned on the same horizontal plane with the lower surface of the compression ring 1, and enabling the stirring sleeve 2 and the stirring pin 3 to start rotating at the rotation speed of omega 0 to preheat the surface of the welded workpiece, wherein the rotation speed of omega 0 is 500-1500 rpm;
A high-rotation-speed inserting stage, namely, increasing the rotation speed of the stirring sleeve 2 and the stirring pin 3 from omega 0 to omega 1, inserting the stirring sleeve 2 downwards into the welded plate 4 to a depth P 1 at a speed V 1, drawing back the stirring pin 3 upwards at a speed V 2, and enabling V 2 to be (D 1 2 -D 2 2) V 1/D 2 2, wherein D 1 is the diameter of the stirring sleeve 2, D 2 is the diameter of the stirring pin 3, and omega 1 is 1500-5000 rpm;
A low-rotation-speed inserting stage, namely reducing the rotation speed of the stirring sleeve 2 and the stirring pin 3 from omega 1 to omega 2, inserting the stirring sleeve 2 into the welded plate 4 downwards to a depth P 2 at a speed V 1, and drawing back the stirring pin 3 upwards at a speed V 2, wherein omega 2 is 800-3000 rpm, and omega 2 is less than omega 1;
in the low-rotation-speed backfilling stage, the rotation speed of the stirring sleeve 2 and the stirring pin 3 is adjusted from omega 2 to omega 3, wherein omega 3 is less than omega 1, the stirring sleeve 2 is pulled back upwards to a position with a depth P 3 away from the upper surface of the welded plate 4 at a speed V 1, and the stirring pin 3 is pressed downwards at a speed V 2, wherein omega 3 is 800-3000 rpm;
Adjusting the rotation speed of the stirring sleeve 2 and the stirring pin 3 from omega 3 to omega 4, wherein omega 4 is more than omega 2, and omega 4 is more than omega 3, drawing the stirring sleeve 2 back to the upper surface of the welded plate 4 at a speed of V 1, and pressing the stirring pin 3 downwards at a speed of V 2 until the lower surface of the stirring pin 3 and the lower surface of the stirring sleeve 2 are positioned on the same horizontal plane, wherein omega 4 is 1500-5000 rpm;
and (3) a workpiece leaving stage after welding: the stirring sleeve 2 and the stirring pin 3 stop rotating, and the stirring sleeve 2 and the stirring pin 3 are pulled away from the surface of the welded plate 4.
the workpiece fixing and preheating mainly comprises the steps of clamping the welded workpiece by a welding tool, and simultaneously, starting to rotate the stirring sleeve 2 and the stirring pin 3 to preheat the welded workpiece. The high-rotating-speed pricking stage mainly comprises the step of pricking the workpiece to be welded with the stirring sleeve 2 at a high rotating speed so that the workpiece obtains enough heat input to perform subsequent welding point forming. And in the low-rotation-speed pricking stage, the stirring sleeve 2 is mainly pricked into the workpiece to be welded at a low rotation speed, and the rise of the welding temperature is controlled. In the low-rotation-speed backfilling stage, the stirring sleeve 2 is pumped back upwards at a low rotation speed, and the welding temperature is controlled to rise; the high-speed backfill stage mainly pumps the stirring sleeve 2 back upwards at a higher speed so that the workpiece obtains enough heat input to obtain good welding spot forming. And finally, completing the drawing-off of the welded workpiece. The design of the stages enables the variable-rotating-speed backfill type friction stir spot welding method provided by the invention to adopt the variable rotating speeds of the stirring sleeve 2 and the stirring pin 3 to accurately control the welding heat input in the welding process. The relatively high rotational speed is used in the initial stage of soldering, and when sufficient heat input is obtained by the solder to ensure good solder joint formation, the rotational speed is reduced to suppress the rise of soldering temperature. Therefore, the forming of the welding spot is ensured, the welding peak temperature can be reduced to be lower than the initial melting temperature of the material, and the welded material is prevented from being locally melted. Thereby enhancing the corrosion resistance and the mechanical property of the joint.
Example 2
The difference between this embodiment and embodiment 1 is that in this embodiment, during the high speed penetration phase, the speed of the stirring sleeve 2 and the stirring pin 3 is increased from ω 0 to ω 1, ω 1 is 2000rpm, which allows the welded material to obtain sufficient heat input for the subsequent formation of weld spots.
Example 3
The difference between this embodiment and embodiment 1 is that in this embodiment, the rotation speed of the stirring sleeve 2 and the stirring pin 3 is reduced from ω 1 to ω 2, ω 2 is 1000rpm in the low rotation speed insertion stage, and this rotation speed can limit the welding peak temperature below the initial melting temperature of the material, and at the same time, the material has better fluidity for forming the welding point.
example 4
the difference between this embodiment and embodiment 1 is that in this embodiment, the rotation speed of the stirring sleeve 2 and the stirring pin 3 is adjusted from ω 2 to ω 3 and ω 3 to 1200rpm during the low rotation speed backfill stage.
Example 5
The difference between this embodiment and embodiment 1 is that in this embodiment, the rotation speed of the stirring sleeve 2 and the stirring pin 3 is adjusted from ω 3 to ω 4, and ω 4 > ω 2 and ω 4 > ω 3, and ω 4 is 1500rpm during the high rotation speed backfill stage.
Experimental example 1
The friction spot welding method in the prior art is selected to be compared with the variable-rotating-speed backfill type friction stir spot welding method provided by the embodiments 1 to 5, and the friction spot welding method works on the aluminum alloy under the same conditions. As shown in fig. 7 and 8, as is apparent from the description of fig. 7, the spot welding method according to the prior art resulted in an aluminum alloy friction stir spot welded joint in which liquefied cracks and intergranular eutectic phases were generated. As can be seen from fig. 8, the variable-speed backfilling type friction stir spot welding method according to the embodiment of the present invention can obtain a friction stir spot welded joint of aluminum alloy without occurrence of liquefied cracks and intergranular eutectic phases.
In summary, the variable-rotation-speed backfill type friction spot welding method provided by the embodiment of the invention has the beneficial effects that:
The invention provides a variable-rotating-speed backfill type friction stir spot welding method which mainly comprises a workpiece fixing and preheating stage, a high-rotating-speed inserting stage, a low-rotating-speed backfilling stage, a high-rotating-speed backfilling stage and a welding finished workpiece leaving stage. The design of the stages enables the variable-rotating-speed backfill type friction stir spot welding method provided by the invention to adopt the variable rotating speeds of the stirring sleeve 2 and the stirring pin 3 to accurately control the welding heat input in the welding process. The relatively high rotational speed is used in the initial stage of soldering, and when sufficient heat input is obtained by the solder to ensure good solder joint formation, the rotational speed is reduced to suppress the rise of soldering temperature. Therefore, the forming of the welding spot is ensured, the welding peak temperature can be reduced to be lower than the initial melting temperature of the material, and the welded material is prevented from being locally melted. Thereby enhancing the corrosion resistance and the mechanical property of the joint.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. a variable-rotating-speed backfill type friction stir spot welding method is characterized by comprising the following steps:
Fixing and preheating a workpiece, namely closely attaching the lower surface of a compression ring to the upper surface of a welded plate, enabling the lower surfaces of a stirring sleeve and a stirring pin to be positioned on the same horizontal plane with the lower surface of the compression ring, enabling the stirring sleeve and the stirring pin to start rotating at the rotating speed of omega 0, and preheating the surface of the welded workpiece;
A high-rotation-speed inserting stage, namely, increasing the rotation speed of the stirring sleeve and the stirring pin from omega 0 to omega 1, inserting the stirring sleeve into the welded plate downwards to a depth P 1 at a speed V 1, drawing the stirring pin back upwards at a speed V 2, and changing V 2 to (D 1 2 -D 2 2) V 1/D 2 2, wherein D 1 is the diameter of the stirring sleeve, and D 2 is the diameter of the stirring pin;
A low-speed inserting stage, namely reducing the rotating speed of the stirring sleeve and the stirring pin from omega 1 to omega 2, continuously inserting the stirring sleeve into the welded plate downwards at a speed V 1 to a depth P 2, and drawing back the stirring pin upwards at a speed V 2;
Adjusting the rotation speed of the stirring sleeve and the stirring pin from omega 2 to omega 3, wherein omega 3 is less than omega 1, drawing the stirring sleeve back upwards to a position with a depth P 3 away from the upper surface of the welded plate at a speed V 1, and pressing the stirring pin downwards at a speed V 2;
Adjusting the rotation speed of the stirring sleeve and the stirring pin from omega 3 to omega 4, and omega 4 > omega 2 and omega 4 > omega 3, drawing the stirring sleeve back upwards to the upper surface of the welded plate at a speed V 1, and pressing the stirring pin downwards at a speed V 2 until the lower surface of the stirring pin and the lower surface of the stirring sleeve are positioned on the same horizontal plane;
and (3) a workpiece leaving stage after welding: stopping the rotation of the stirring sleeve and the stirring pin, and drawing the stirring sleeve and the stirring pin away from the surface of the welded plate.
2. the variable-speed backfill type friction stir spot welding method according to claim 1, characterized in that:
In the workpiece fixing and preheating step, the rotating speed omega 0 of the stirring sleeve and the stirring pin is 500-1500 rpm.
3. The variable-speed backfill type friction stir spot welding method according to claim 1, characterized in that:
And in the high-rotation-speed pricking stage, the rotation speed of the stirring sleeve and the stirring pin is increased from omega 0 to omega 1, wherein omega 1 is 1500-5000 rpm.
4. the variable-speed backfill type friction stir spot welding method according to claim 3, characterized in that:
In the high-speed penetration stage, the rotating speed of the stirring sleeve and the stirring pin is increased from omega 0 to omega 1, wherein omega 1 is 2000 rpm.
5. The variable-speed backfill type friction stir spot welding method according to claim 1, characterized in that:
in the low-speed penetration stage, the rotating speed of the stirring sleeve and the stirring pin is reduced from omega 1 to omega 2, omega 2 is 800-3000 rpm, and omega 2 is less than omega 1.
6. The variable-speed backfill type friction stir spot welding method according to claim 5, characterized in that:
In the low-speed penetration stage, the rotation speed of the stirring sleeve and the stirring pin is reduced from omega 1 to omega 2, wherein omega 2 is 1000 rpm.
7. The variable-speed backfill type friction stir spot welding method according to claim 1, characterized in that:
In the low-rotation-speed backfilling stage, the rotation speed of the stirring sleeve and the stirring pin is adjusted from omega 2 to omega 3, wherein omega 3 is less than omega 1, and omega 3 is 800-3000 rpm.
8. The variable-speed backfill type friction stir spot welding method according to claim 7, characterized in that:
And in the low-rotation-speed backfilling stage, the rotation speed of the stirring sleeve and the stirring pin is adjusted from omega 2 to omega 3, and omega 3 is 1200 rpm.
9. the variable rotational speed backfill type friction stir spot welding method according to any one of claims 1 to 8, characterized in that:
in the high-rotation-speed backfilling stage, the rotation speed of the stirring sleeve and the stirring pin is adjusted from omega 3 to omega 4, and omega 4 is larger than omega 2, omega 4 is larger than omega 3, and omega 4 is 1500-5000 rpm.
10. The variable speed backfill type friction stir spot welding method according to claim 9, wherein:
In the high-rotation-speed backfilling stage, the rotation speed of the stirring sleeve and the stirring pin is adjusted from omega 3 to omega 4, and omega 4 > omega 2 and omega 4 > omega 3, and omega 4 is 1500 rpm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810381962.4A CN108274110B (en) | 2018-04-24 | 2018-04-24 | Variable-rotating-speed backfill type friction stir spot welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810381962.4A CN108274110B (en) | 2018-04-24 | 2018-04-24 | Variable-rotating-speed backfill type friction stir spot welding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108274110A CN108274110A (en) | 2018-07-13 |
| CN108274110B true CN108274110B (en) | 2019-12-10 |
Family
ID=62811785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810381962.4A Active CN108274110B (en) | 2018-04-24 | 2018-04-24 | Variable-rotating-speed backfill type friction stir spot welding method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108274110B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109175669A (en) * | 2018-09-17 | 2019-01-11 | 上海航天设备制造总厂有限公司 | A kind of friction spot welding increasing material manufacturing method |
| US10442029B1 (en) | 2019-04-10 | 2019-10-15 | King Saud University | Method of friction stir spot welding |
| CN110170738B (en) * | 2019-06-05 | 2021-04-02 | 北京石油化工学院 | Method for realizing additive manufacturing by using backfill type friction stir spot welding |
| CN110587114B (en) * | 2019-09-26 | 2020-07-10 | 西北工业大学 | Backfill type friction stir spot welding method |
| CN114192969B (en) * | 2021-12-31 | 2023-06-27 | 沈阳航空航天大学 | Reverse backfill type friction stir spot welding method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006320924A (en) * | 2005-05-18 | 2006-11-30 | Sumitomo Light Metal Ind Ltd | Friction stir spot welding process |
| CN104942427A (en) * | 2015-06-12 | 2015-09-30 | 哈尔滨工业大学 | Asymmetric backfilling type friction stir spot welding method eliminating holes and annular trenches |
| CN105522273A (en) * | 2014-10-22 | 2016-04-27 | 上海航天设备制造总厂 | Secondary back-filling type friction stir spot welding method |
| CN106001896A (en) * | 2016-06-12 | 2016-10-12 | 上海航天设备制造总厂 | Aluminum/steel dissimilar material friction spot welding method based on surface roughing |
| CN106862749A (en) * | 2017-01-23 | 2017-06-20 | 沈阳航空航天大学 | A kind of backfill formula friction stir spot welding method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5588385B2 (en) * | 2011-03-18 | 2014-09-10 | 川崎重工業株式会社 | Friction stir spot welding apparatus and friction stir spot welding method |
-
2018
- 2018-04-24 CN CN201810381962.4A patent/CN108274110B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006320924A (en) * | 2005-05-18 | 2006-11-30 | Sumitomo Light Metal Ind Ltd | Friction stir spot welding process |
| CN105522273A (en) * | 2014-10-22 | 2016-04-27 | 上海航天设备制造总厂 | Secondary back-filling type friction stir spot welding method |
| CN104942427A (en) * | 2015-06-12 | 2015-09-30 | 哈尔滨工业大学 | Asymmetric backfilling type friction stir spot welding method eliminating holes and annular trenches |
| CN106001896A (en) * | 2016-06-12 | 2016-10-12 | 上海航天设备制造总厂 | Aluminum/steel dissimilar material friction spot welding method based on surface roughing |
| CN106862749A (en) * | 2017-01-23 | 2017-06-20 | 沈阳航空航天大学 | A kind of backfill formula friction stir spot welding method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108274110A (en) | 2018-07-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108274110B (en) | Variable-rotating-speed backfill type friction stir spot welding method | |
| US9289842B2 (en) | Structure and method of bonding copper and aluminum | |
| CN109623128A (en) | A kind of stirring-head and welding procedure for Solder for Al-Cu Joint Welding dissimilar metal object Hybrid connections | |
| JP2007253172A (en) | Friction stir welding method of aluminum alloy and steel sheet, and friction stir welding member | |
| CN102896398A (en) | Aluminum alloy arc spot welding method based on CMT (Cold Metal Transmission Welding) and welding system | |
| CN112135705B (en) | Method and system for additive manufacturing or repair by in situ manufacturing and feeding of a sintering line | |
| JP6739854B2 (en) | Friction welding method | |
| CN111570997A (en) | Backfill type friction stir spot welding tool and backfill type friction stir spot welding method | |
| CN114192969B (en) | Reverse backfill type friction stir spot welding method | |
| JPWO2019151057A1 (en) | Repair / modification method for metal-based substrates | |
| CN109877442A (en) | Improve the method for Aluminum Alloy Friction Stir Welding performance | |
| CN106392368A (en) | High-temperature Zn-based soft solder for soldering aluminum and copper and welding method | |
| WO2015125659A1 (en) | Friction stir bonding method and friction stir bonded substance | |
| JP2002035962A (en) | Friction stir welding method for lap joint | |
| CN108857114A (en) | The auxiliary thermal agitation friction welding method of fusion welding in the case of a kind of prefabricated groove | |
| JP2007301573A (en) | Friction stirring and joining method and friction stirred and joined structure | |
| TWI307286B (en) | Golf head and welding method thereof | |
| JP2023013804A (en) | Joining device and joining method for friction stir joining and resistance welding | |
| CN109986194A (en) | Friction stir welding tools and the welding method for reducing face of weld residual stress | |
| JP2000301363A (en) | Friction agitation joining method of active metal material | |
| JP2002283070A (en) | Friction stir welding method for different kinds of metallic materials | |
| CN115302070A (en) | Differential rotation backfill type friction stir spot welding device and method | |
| CN212470169U (en) | Backfill formula friction stir spot welding instrument and backfill formula friction stir spot welding system | |
| US8426762B2 (en) | Method of resistance butt welding using corrugated flux-filled metal inserts | |
| CN104772561B (en) | Weld the friction stir welding method of harden structure and cylinder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 510000 363 Changxin Road, Tianhe District, Guangzhou, Guangdong. Patentee after: China Uzbekistan Welding Research Institute Guangdong Academy of Sciences Address before: 510000 courtyard, no.363, Changxing Road, Tianhe District, Guangzhou City, Guangdong Province Patentee before: Guangdong Welding Institute (China-Ukraine E.O. Paton Institute of Welding) |
|
| CP03 | Change of name, title or address |