CN117564435A - Long straight weld joint reciprocating filling type friction stir wire welding method and welding device - Google Patents
Long straight weld joint reciprocating filling type friction stir wire welding method and welding device Download PDFInfo
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- CN117564435A CN117564435A CN202311280973.0A CN202311280973A CN117564435A CN 117564435 A CN117564435 A CN 117564435A CN 202311280973 A CN202311280973 A CN 202311280973A CN 117564435 A CN117564435 A CN 117564435A
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- 238000003756 stirring Methods 0.000 title claims abstract description 332
- 238000003466 welding Methods 0.000 title claims abstract description 140
- 238000000034 method Methods 0.000 title claims abstract description 46
- 239000000463 material Substances 0.000 claims abstract description 30
- 230000008569 process Effects 0.000 claims abstract description 21
- 238000004140 cleaning Methods 0.000 claims description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims 2
- 239000011324 bead Substances 0.000 claims 1
- 239000000945 filler Substances 0.000 claims 1
- 238000003780 insertion Methods 0.000 description 7
- 230000037431 insertion Effects 0.000 description 7
- 210000001503 joint Anatomy 0.000 description 5
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- 238000011160 research Methods 0.000 description 2
- 238000013519 translation Methods 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- -1 aluminum alloy Chemical class 0.000 description 1
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- 230000002195 synergetic effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- 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
-
- 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
Abstract
The invention relates to the technical field of friction stir welding, in particular to a long straight welding line reciprocating filling type friction stir welding method and a welding device. The wire bonding method comprises the following steps: the upper stirring tool and the lower stirring tool are respectively moved to the upper side and the lower side of a starting welding point of a welded workpiece, pressed on the two sides of the welded workpiece with a preset pressure and rotated; the upper stirring pin and the lower stirring pin move upwards and downwards at the same speed respectively and repeatedly until the temperature field and the plastic flow field of the starting welding point reach a quasi-steady state, wherein the maximum distance of movement is half of the total thickness of the welded workpiece material; the upper stirring pin and the lower stirring pin move up and down and move horizontally at the same speed, and the positions of the upper stirring sleeve and the lower stirring sleeve in the vertical direction are kept unchanged and move along until reaching a final welding point. The invention solves the problems of incomplete welding/weak connection and the like in the wire welding process of long straight welding lines, and reduces the forward resistance in the transverse movement process of the stirring pin.
Description
Technical Field
The invention relates to the technical field of friction stir welding, in particular to a long straight welding line reciprocating filling type friction stir welding method and a welding device.
Background
The disclosure of this background section is only intended to increase the understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art already known to those of ordinary skill in the art.
Friction stir welding (Friction Stir Welding, FSW) was a solid phase welding method invented by the british welding research in 1991. The main advantages are: the welding heat input is small, the welding quality is high, the welding deformation is small, the welding process is environment-friendly, and the like, is particularly suitable for welding light nonferrous metals such as aluminum alloy, and has great application potential in the fields of aerospace, rail transit, new energy automobiles, and the like.
After that, researchers have sequentially proposed improved friction stir welding methods such as static shoulder friction stir welding, dual shoulder friction stir welding, hot/cold source assisted friction stir welding, ultrasonic energy field assisted friction stir welding, and the like. However, after the stirring head leaves the welded workpiece, an exit hole (commonly called a keyhole) is left on the welded workpiece, so that the aesthetic degree and flatness of the welding seam are affected, and the overall performance of the welding seam is weakened.
The prior art discloses a backfill type spot welding method, which can obtain a spot welding joint without a keyhole, but aims at spot welding of a lap joint, and still faces the problems of incomplete welding/weak connection and the like of the bottom of a welded workpiece in the wire welding process of a long straight welding line, and the insertion depth of a stirring pin/rod is large, the stirring pin/rod bears larger forward resistance, the welding speed is not too high, the welding efficiency is low, and the service life of the stirring pin is short.
Disclosure of Invention
Aiming at the defects existing in the prior art, the embodiment of the invention aims to provide a long straight welding line reciprocating filling type friction stir wire welding method, old materials are continuously introduced into a cavity of an upper stirring pin/a lower stirring pin and new materials are continuously discharged during transverse movement, so that plastic flow of the materials along the horizontal and vertical directions is greatly improved, the problems of incomplete welding/weak connection and the like in the wire welding process of the long straight welding line are solved, and the forward resistance in the transverse movement process of the stirring pin is reduced.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
a long straight weld reciprocating filled friction stir wire welding method comprising:
the upper stirring tool and the lower stirring tool respectively move to the upper side and the lower side of a starting welding point of a welded workpiece, are pressed on the two sides of the welded workpiece with a preset pressure and rotate, wherein the upper stirring tool comprises an upper stirring sleeve and an upper stirring pin, and the lower stirring tool comprises a lower stirring sleeve and a lower stirring pin;
the upper stirring pin and the lower stirring pin move upwards and downwards at the same speed respectively and repeatedly until the temperature field and the plastic flow field of the starting welding point reach a quasi-steady state, wherein the maximum distance of movement is half of the total thickness of the welded workpiece material;
the upper stirring pin and the lower stirring pin move up and down and move horizontally at the same speed, and the positions of the upper stirring sleeve and the lower stirring sleeve in the vertical direction are kept unchanged and move along until reaching a final welding point.
Optionally, pre-treating the workpiece to be welded between welds includes: polishing the joint surface of the welded workpiece to be smooth, cleaning the oxide film, cleaning with absolute ethyl alcohol and drying.
Optionally, before the upper stirring tool contacts the welded workpiece with the lower stirring tool, the end parts of the upper stirring pin and the upper stirring sleeve are flush, and the end parts of the lower stirring pin and the lower stirring sleeve are flush.
Optionally, in the process of upward and downward reciprocating movement of the upper stirring pin and the lower stirring pin, the movement speeds of the upper stirring pin and the lower stirring pin along the vertical direction are the same, and the distance between the lower end of the upper stirring pin and the upper end of the lower stirring pin is kept unchanged.
Optionally, when the upper stirring pin and the lower stirring pin move upwards, the lower stirring pin extrudes the plastic material of the welded workpiece into the upper stirring sleeve; when the upper stirring pin and the lower stirring pin move downwards, the upper stirring pin extrudes the plastic material of the welded workpiece into the lower stirring sleeve.
Optionally, the translational speeds of the upper stirring sleeve, the upper stirring pin, the lower stirring sleeve and the lower stirring pin in the welding stage are the same; the rotation speeds of the upper stirring sleeve, the upper stirring pin, the lower stirring sleeve and the lower stirring pin are the same or different.
Optionally, after reaching the final welding point, the upper stirring pin moves to a position flush with the end part of the upper stirring sleeve, and the lower stirring pin moves to a position flush with the end part of the lower stirring sleeve; the upper stirring tool and the lower stirring tool stop rotating and move upwards and downwards respectively to finish welding.
The embodiment of the invention also provides a welding device for the long straight welding line reciprocating filling type friction stir wire welding method, which comprises an upper stirring tool and a lower stirring tool, wherein the upper stirring tool and the lower stirring tool are respectively positioned at two sides of a welded workpiece; the upper stirring tool comprises an upper stirring sleeve and an upper stirring needle, the upper stirring sleeve is provided with a through hole, and the upper stirring needle is arranged in the through hole of the upper stirring sleeve and can move along the axis of the upper stirring sleeve; the lower stirring tool comprises a lower stirring sleeve and a lower stirring needle, the lower stirring sleeve is provided with a through hole, and the lower stirring needle is arranged in the through hole of the lower stirring sleeve and can move along the axis of the lower stirring sleeve.
Optionally, the outer diameter sizes of the upper stirring sleeve and the lower stirring sleeve are equal, and the upper stirring sleeve and the lower stirring sleeve are kept in vertical alignment in the welding process, and the diameter sizes of the upper stirring pin and the lower stirring pin are equal.
Optionally, the end parts of the upper stirring sleeve and the lower stirring sleeve, which face the workpiece to be welded, are smooth planes or rough surfaces; the end parts of the upper stirring pin and the lower stirring pin, which face the workpiece to be welded, are smooth planes or rough surfaces, and the circumferential side surfaces are smooth planes or rough surfaces.
One or more technical solutions provided in the embodiments of the present invention at least have the following technical effects or advantages:
1. the method for welding the long straight welding seam by the reciprocating filling type friction stir wire can realize high-quality connection of the long straight welding seam of a thick plate in a butt joint, lap joint or other possible joint modes, old materials are continuously introduced into and discharged from a cavity of an upper stirring pin and a lower stirring pin while an upper stirring tool and a lower stirring tool move transversely, the upper stirring pin and the lower stirring pin are inserted into a workpiece in a reciprocating mode, the interface of the pair/lap joint is disturbed circularly, plastic flow of the materials along the horizontal direction and the vertical direction is greatly improved, the problems of incomplete welding/weak connection and the like in the wire welding process of the long straight welding seam are solved, and the forward resistance in the transverse moving process of the stirring pin is reduced, so that the welding speed is improved, the welding efficiency is further improved, and the service life of the stirring head is prolonged.
2. The size of the stirring tool has great flexibility, and the upper/lower stirring pin can move independently of the upper/lower stirring sleeve, so that the depth of the upper/lower stirring pin inserted into the welded workpiece can be adjusted at will, and when the thickness of the welded workpiece changes, only the insertion depth of the upper/lower stirring pin is required to be changed, and a new stirring tool is not required to be replaced.
3. The maximum insertion depth of the upper/lower stirring pin is only half of the total thickness of the welded workpiece material, so that high-quality welding can be finished, the stress of the stirring tool is greatly reduced, and the welding efficiency is improved.
4. Almost no material is lost in the welding process, no keyhole exists after the welding is finished, the surface of the welding line is smooth, and the whole performance of the welding line is good.
Additional aspects of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic illustration of a long straight weld reciprocating filled friction stir wire welding process employing a welding apparatus of the present invention;
in the figure: 1. a stirring sleeve is arranged on the upper part; 2. a stirring pin is arranged on the upper part; 3. a lower stirring sleeve; 4. a lower stirring pin; 5. a work piece to be welded;
the mutual spacing or dimensions are exaggerated for the purpose of showing the positions of the various parts, and the schematic illustrations are used for illustration only.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the invention clearly indicates otherwise, and it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
Conventional friction stir welding was wire-welded for long straight welds, as mentioned in the background, was invented by the British welding research in 1991, whereas conventional friction stir spot welding was invented by the Japan Maadam company around 1993. The existing spot welding for lap joints, if being directly applied to the wire welding of butt joint or lap joint long straight welding seams, needs to meet the requirement that the insertion depth of a stirring pin/rod is equal to or slightly smaller than the thickness of a plate, thus still facing the problems that the bottom of a welded workpiece is not welded thoroughly/is not welded tightly/is weakly connected and the like, and the insertion depth of the stirring pin/rod is large, the stirring pin/rod bears larger forward resistance, the welding speed is not too high, the service life of the stirring pin is short, and the welding efficiency is low.
For ease of understanding, this embodiment first describes the welding apparatus of the present invention, as shown in fig. 1, comprising upper and lower stirring tools, one on each side of the workpiece to be welded, which may take the form of a butt joint, lap joint, or other possible joint.
The upper stirring tool comprises an upper stirring sleeve and an upper stirring needle, the upper stirring sleeve is provided with a through hole, and the upper stirring needle is arranged in the through hole of the upper stirring sleeve and can move along the axis of the upper stirring sleeve; the lower stirring tool comprises a lower stirring sleeve and a lower stirring needle, the lower stirring sleeve is provided with a through hole, and the lower stirring needle is arranged in the through hole of the lower stirring sleeve and can move along the axis of the lower stirring sleeve. Where "upper" and "lower" are used merely to indicate correspondence with the upper and lower directions of the drawings themselves, and are not limiting in structure, only for convenience of description and simplification of description, and are not intended to indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The upper stirring tool and the lower stirring tool are respectively arranged on the upper side and the lower side of the welded workpiece and driven by different servo motors so as to realize actions such as rotation, upward movement, downward movement, translation and the like, and the welding is completed.
The upper stirring sleeve and the lower stirring sleeve are both cylindrical, and the end parts of the upper stirring sleeve and the lower stirring sleeve are smooth planes or rough surfaces with certain grain characteristics. The upper stirring pin and the lower stirring pin are both cylindrical/conical, the side surfaces of the upper stirring pin and the lower stirring pin can be provided with threads, planes, grooves and other characteristics, and the end parts of the upper stirring pin and the lower stirring pin can be plane or rough surfaces with certain grain characteristics.
The outer diameter of the upper stirring sleeve and the outer diameter of the lower stirring sleeve are 1-500 mm, the outer diameter and the outer diameter are equal, and the upper stirring sleeve and the lower stirring sleeve are kept aligned up and down in the welding process. The diameters (inner diameters) of the upper stirring pin (the upper stirring sleeve) and the lower stirring pin (the lower stirring sleeve) are 1-200 mm, and the diameters (inner diameters) of the upper stirring pin and the lower stirring pin are equal or slightly different.
In the welding process, when the upper stirring tool (the upper stirring sleeve 1 and the upper stirring pin 2) and the lower stirring tool (the lower stirring sleeve 3 and the lower stirring pin 4) move along the welding direction, the angle deviating from the vertical direction is 0-15 degrees.
During welding, the upper stirring tool and the lower stirring tool cooperate to respectively press the workpiece to be welded from the upper direction and the lower direction, rotate at a high speed and walk along a preset track line. Under the action of friction heat, the welded workpiece material reaches a plastic state. The upper pin and lower pin then reciprocate up and down at the same speed, driving the material to flow in both the horizontal and vertical directions and perturbing the bonding interface of the workpieces being welded. And finally, respectively returning the upper stirring pin and the lower stirring pin to the flush positions of the upper stirring sleeve and the lower stirring sleeve to finish welding, thereby forming a high-quality thick plate long straight-line welding seam without a keyhole.
The upper/lower stirring tools of the welding device are designed in a split type, and the upper/lower stirring sleeve and the upper/lower stirring pin can independently reciprocate up and down along the vertical direction, so that the accurate regulation and control of welding heat input and plastic flow of materials are realized; the upper stirring pin and the lower stirring pin act on the upper surface and the lower surface of the welded workpiece respectively, so that welding defects such as incomplete welding, weak connection and the like are effectively avoided, and the metallurgical bonding strength of the welded workpiece is enhanced; the maximum insertion depth of the upper stirring pin and the lower stirring pin is only half of the total thickness of the workpiece, so that the welding resistance is reduced, and the welding efficiency is improved; in the whole welding process, almost no material of the welded workpiece is lost, and a welding seam with a flat surface and no keyhole is formed.
The method for carrying out reciprocating filling type wire welding on the overlapped or butted thick plate long straight line welding seams by the welding device comprises the following steps:
step 1: corresponding to fig. 1 (a), the joint surface of the welded workpiece 5 is polished to be flat, oxide films are cleaned, absolute ethyl alcohol is used for cleaning and drying, then the welded workpiece 5 is fixed by a specific fixture, an upper stirring tool (an upper stirring sleeve 1 and an upper stirring pin 2) and a lower stirring tool (a lower stirring sleeve 3 and a lower stirring pin 4) are respectively moved to the upper side and the lower side of a starting welding spot of the welded workpiece 5 and aligned, the end parts of the upper stirring pin 2 and the upper stirring sleeve 1 are level, and the end parts of the lower stirring pin 4 and the lower stirring sleeve 3 are level;
step 2: corresponding to fig. 1 (b), an automatic program is started to start a welding process, and an upper stirring tool (an upper stirring sleeve 1 and an upper stirring pin 2) and a lower stirring tool (a lower stirring sleeve 3 and a lower stirring pin 4) are respectively pressed at two sides of a welding point of a welded workpiece 5 with a certain pressure and respectively start to rotate;
step 3: corresponding to fig. 1 (c), after the temperature at the starting welding point reaches the plastic state of the material, the upper stirring sleeve 1 and the lower stirring sleeve 3 are kept still, the upper stirring pin 2 and the lower stirring pin 4 move up or down at the same speed respectively, and the maximum distance of the up or down movement is half of the total thickness of the material of the welded workpiece 5;
step 4: corresponding to fig. 1 (d), repeating step 3, and moving the upper stirring pin 2 and the lower stirring pin 4 upwards or downwards at the same speed respectively, and reciprocating until the temperature field and the plastic flow field around the stirring tool reach a quasi-steady state;
step 5: corresponding to fig. 1 (e), the upper stirring tool (upper stirring sleeve 1 and upper stirring pin 2) and the lower stirring tool (lower stirring sleeve 3 and lower stirring pin 4) respectively translate in the horizontal direction at the same speed, and welding is started. In the process, the positions of the upper stirring sleeve 1 and the lower stirring sleeve 3 in the vertical direction are kept unchanged, the upper stirring pin 2 and the lower stirring pin 4 move upwards or downwards respectively at the same speed, and the maximum distance of the upwards or downwards movement is half of the total thickness of the material of the welded workpiece 5;
step 6: corresponding to fig. 1 (f), repeating step 5, the upper stirring pin 2 and the lower stirring pin 4 move up or down at the same time and reciprocate respectively until the upper stirring tool (the upper stirring sleeve 1 and the upper stirring pin 2) and the lower stirring tool (the lower stirring sleeve 3 and the lower stirring pin 4) reach the final welding point;
step 7: corresponding to fig. 1 (g), reaching the final welding point, the upper stirring pin 2 moves to a position flush with the end of the upper stirring sleeve 1, and the lower stirring pin 4 moves to a position flush with the end of the lower stirring sleeve 3;
step 8: corresponding to fig. 1 (h), the upper stirring tool (upper stirring sleeve 1 and upper stirring pin 2) and the lower stirring tool (lower stirring sleeve 3 and lower stirring pin 4) stop rotating and move upward and downward respectively, leave the welded workpiece 5, and finish welding.
The rotation speeds of the four tool parts of the upper stirring sleeve 1, the upper stirring pin 2, the lower stirring sleeve 3 and the lower stirring pin 4 can be the same or different so as to adjust and optimize the heat generation amount and the material flow in the welding process, and the rotation speed can be 0-20000 rpm.
The translation speeds of the four tool components of the upper stirring sleeve 1, the upper stirring pin 2, the lower stirring sleeve 3 and the lower stirring pin 4 in the welding stage are the same and are 0-10 m/min.
The speed/distance of the upper stirring pin 2 and the lower stirring pin 4 along the vertical direction is always consistent, and the purpose of the stirring pin is to ensure that materials in a stirring area cannot overflow or generate a cavity, and ensure the forming quality of a welding seam.
The steps are applicable to welding thick plate long straight line welding seams and the like of aluminum alloy, magnesium alloy, copper alloy, titanium alloy, high-entropy alloy, steel and any two or more dissimilar metals in butt joint, lap joint and other possible joint forms, and compared with the conventional process method, the method has great improvement and advantages:
firstly, go up stirring instrument and lower stirring instrument and be split type design, and the synergism between each part can adapt to the welded work piece of different thickness, when the thickness of welded work piece changes, only need modify the degree of depth of inserting of last stirring needle and lower stirring needle in welding procedure can realize the welding.
Secondly, the stirring tool cooperates with the upper surface and the lower surface of the welded workpiece, old materials are continuously introduced into and new materials are continuously discharged from the cavity of the upper/lower stirring pin, plastic flow of the materials along the horizontal and vertical directions is greatly improved, the behaviors of heat input, material flow and the like of different parts on the welded workpiece can be easily optimized by adjusting the rotating speed of the stirring tool, welding defects such as incomplete welding, weak connection and the like are effectively avoided, and the welding joint strength is improved.
And the maximum insertion depth of the upper stirring pin and the lower stirring pin is only half of the total thickness of the welded workpiece material, so that the rotation torque and the advancing resistance of the stirring pin are greatly reduced, the abrasion tendency of the stirring tool is reduced, the service life of the stirring tool is ensured, the production cost is reduced, and the welding efficiency is improved.
Finally, the material of the plastic deformation area is always wrapped in an area with unchanged volume under the synergistic action of all parts of the stirring tool, so that the loss of the material of the welded workpiece is almost avoided in the whole welding process, no keyhole is arranged at a final welding point after the welding is finished, the surface of the welding seam is smooth, and the overall performance of the welding seam is good.
While the foregoing description of the embodiments of the present invention has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the invention, but rather, it is intended to cover all modifications or variations within the scope of the invention as defined by the claims of the present invention.
Finally, it should be noted that, if not conflicting, the embodiments of the present invention and the features of the embodiments may be combined with each other, which are all within the protection scope of the present invention. Additionally, all or some of the steps in the methods described above may be performed in a computer system, such as a set of computer executable instructions, and, although the steps are listed in order of 1, 2, 3 …, in some cases, the steps shown or described may be performed in an order different than that described herein.
Claims (10)
1. A method of long straight weld reciprocating filled friction stir wire welding, comprising:
the upper stirring tool and the lower stirring tool respectively move to the upper side and the lower side of a starting welding point of a welded workpiece, are pressed on the two sides of the welded workpiece with a preset pressure and rotate, wherein the upper stirring tool comprises an upper stirring sleeve and an upper stirring pin, and the lower stirring tool comprises a lower stirring sleeve and a lower stirring pin;
the upper stirring pin and the lower stirring pin move upwards and downwards at the same speed respectively and repeatedly until the temperature field and the plastic flow field of the starting welding point reach a quasi-steady state, wherein the maximum distance of movement is half of the total thickness of the welded workpiece material;
the upper stirring pin and the lower stirring pin move up and down and move horizontally at the same speed, and the positions of the upper stirring sleeve and the lower stirring sleeve in the vertical direction are kept unchanged and move along until reaching a final welding point.
2. A long straight weld reciprocating filler friction stir wire welding method of claim 1 wherein pre-treating the workpieces being welded between welds comprises: polishing the joint surface of the welded workpiece to be smooth, cleaning the oxide film, cleaning with absolute ethyl alcohol and drying.
3. The method of long straight weld reciprocating filled friction stir wire welding of claim 1 wherein the upper pin is flush with the end of the upper sleeve and the lower pin is flush with the end of the lower sleeve before the upper tool contacts the workpiece being welded with the lower tool.
4. The method for reciprocally filling a long straight weld joint with friction stir wire according to claim 1, wherein the upper stirring pin and the lower stirring pin move up and down in a reciprocal movement process, the movement speeds of the upper stirring pin and the lower stirring pin in the vertical direction are the same, and the distance between the lower end of the upper stirring pin and the upper end of the lower stirring pin is kept unchanged.
5. The method of long straight weld reciprocating filled friction stir wire welding according to claim 4 wherein when said upper pin and lower pin are moved up, the lower pin extrudes plastic material of the welded workpiece into said upper sleeve; when the upper stirring pin and the lower stirring pin move downwards, the upper stirring pin extrudes the plastic material of the welded workpiece into the lower stirring sleeve.
6. The method for reciprocally filling a long straight weld joint with friction stir wire welding according to claim 1, wherein the translational speeds of the upper stirring sleeve, the upper stirring pin, the lower stirring sleeve and the lower stirring pin in the welding stage are the same; the rotation speeds of the upper stirring sleeve, the upper stirring pin, the lower stirring sleeve and the lower stirring pin are the same or different.
7. The long straight weld reciprocating filled friction stir wire welding method of claim 1 wherein upon reaching the final weld, the upper pin moves to a level with the end of the upper stirring sleeve and the lower pin moves to a level with the end of the lower stirring sleeve; the upper stirring tool and the lower stirring tool stop rotating and move upwards and downwards respectively to finish welding.
8. A welding apparatus for use in a long straight bead reciprocating filled friction stir wire welding method as defined in any one of claims 1 to 7 comprising an upper stirring tool and a lower stirring tool, said upper and lower stirring tools being located on either side of the workpiece to be welded, respectively;
the upper stirring tool comprises an upper stirring sleeve and an upper stirring needle, the upper stirring sleeve is provided with a through hole, and the upper stirring needle is arranged in the through hole of the upper stirring sleeve and can move along the axis of the upper stirring sleeve;
the lower stirring tool comprises a lower stirring sleeve and a lower stirring needle, the lower stirring sleeve is provided with a through hole, and the lower stirring needle is arranged in the through hole of the lower stirring sleeve and can move along the axis of the lower stirring sleeve.
9. The welding apparatus of claim 8 wherein said upper and lower mixing sleeves have equal outside diameter dimensions and are maintained in up-down alignment during welding, said upper and lower mixing pins having equal diameter dimensions.
10. The welding apparatus of claim 8 wherein the ends of the upper and lower stirring sleeves facing the workpiece to be welded are smooth or rough; the end parts of the upper stirring pin and the lower stirring pin, which face the workpiece to be welded, are smooth planes or rough surfaces, and the circumferential side surfaces are smooth planes or rough surfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311280973.0A CN117564435A (en) | 2023-09-28 | 2023-09-28 | Long straight weld joint reciprocating filling type friction stir wire welding method and welding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311280973.0A CN117564435A (en) | 2023-09-28 | 2023-09-28 | Long straight weld joint reciprocating filling type friction stir wire welding method and welding device |
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| CN117564435A true CN117564435A (en) | 2024-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311280973.0A Pending CN117564435A (en) | 2023-09-28 | 2023-09-28 | Long straight weld joint reciprocating filling type friction stir wire welding method and welding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117564435A (en) |
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2023
- 2023-09-28 CN CN202311280973.0A patent/CN117564435A/en active Pending
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