CN104999173A - Thin-walled aluminum alloy pipe end sealing and welding device and welding method - Google Patents
Thin-walled aluminum alloy pipe end sealing and welding device and welding method Download PDFInfo
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- CN104999173A CN104999173A CN201510452475.9A CN201510452475A CN104999173A CN 104999173 A CN104999173 A CN 104999173A CN 201510452475 A CN201510452475 A CN 201510452475A CN 104999173 A CN104999173 A CN 104999173A
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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
- B23K20/126—Workpiece support, i.e. backing or clamping
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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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/10—Aluminium or alloys thereof
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- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a thin-walled aluminum alloy pipe end sealing and welding device and welding method. The sealing and welding device comprises a roller carrier unit used for supporting a thin-walled aluminum alloy pipe and an aluminum alloy bar. One end of the aluminum alloy bar is fixed with a hollow chuck installed on a rotary clamp. A centre is installed at the end, penetrating through the chuck, of the aluminum alloy bar. The other end of the aluminum alloy bar is a shaft body with the diameter smaller than that of the aluminum alloy bar. The shaft body and the aluminum alloy bar form a shaft shoulder. The shaft body is inserted into the thin-walled aluminum alloy pipe and is in interference fit with the thin-walled aluminum alloy pipe. A stirring head is installed above the thin-walled aluminum alloy pipe, and sealing and welding of the thin-walled aluminum alloy pipe end are achieved through an H-type welding joint. The thin-walled aluminum alloy pipe end sealing and welding device completes welding at a time through the H-type weld joint, and the welding quality and air impermeability of the aluminum alloy pipe are ensured while the appearance accuracy of a welded part is ensured.
Description
Technical field
The present invention relates to a kind of thin-wall aluminum alloy pipe end soldering and sealing device and welding method, belong to metal material processing field.
Background technology
Friction stir welding (Friction Stir Welding is called for short FSW) is that Britain's institute of welding (The WeldingInstitute) is in the patent solder technology of invention in 1991.Friction stir welding, except having the advantage of conventional friction welding technology, can also carry out the connection of multiple joint form and different welding position.Agitating friction welding technology has been succeeded application in Aeronautics and Astronautics, boats and ships, train, electric power and heavy weapons etc., but currently in the welding of thin-wall aluminum alloy pipe, still there are some problems.
When tube wall becomes hour, welding difficulty becomes large.Patent (201410729971.X) proposes employing gas tungsten arc welding, solves the connectivity problem of small-diameter, thin-walled aluminium alloy pipe; Patent (201010524846.7) proposes the welding method of a kind of minor-diameter nozzle and aluminium alloy thin-walled structure, welds with aluminium alloy thin-walled structure junction minor-diameter nozzle, is equally also to adopt arc welding method to weld.In fact, adopt arc welding method to carry out welding (as ac tungsten inert gases welding) when welding aluminium alloy, very easily cause crackle and pore, especially when thin-wall pipe welds, welding deformation is even more serious, and percent defective even reaches 70%.In order to improve welding quality, patent (201310096100.4) proposes a kind of production method of heat pump minor-caliber ultra-thin-wall high-frequency welding aluminium-alloy pipe, but welding current is higher, reach 230 ~ 235A, the electrical efficiency low (being about about 50%) of high-frequency welding simultaneously, voltage and current is too high, poor stability.The people such as Zheng Ying (patent No.: 201510118191.6,201510118211.X) propose a kind of production method of aluminium alloy super-large diameter thin wall overpressure resistant pipe, and the method for being welded by agitating friction carries out longitudinal seam welding.But do not relate to the end face sealing technique of aluminium-alloy pipe.The people such as Li Hui (come from: AWJT2005, October20-23, Dalian, China, A42-A47) propose a kind of friction stir welding method of thin-wall aluminum alloy cylindrical shell weld seam, but in welding process, weldment is indeformable to need to adopt the equipment of inner tensioner to ensure, also need to hold out against end cap from both sides, and the method proposed is applicable to the situation that aluminium alloy cylindrical body end face has opening simultaneously, namely, when end face requires thoroughly to close, the method proposed cannot be finished the work.
Visible, when thin-wall aluminum alloy pipe (wall thickness is less than 1mm) need end face close welding time, be faced with a welding difficult problem, be embodied in: 1, wall thickness thinner cause rigidity and torsional property poor, be difficult to direct nip rotation welding; 2, the requirement that aluminium alloy end face is closed, causes inner swelling device to be difficult to put into thin-wall pipe inside, thus causes agitating friction to weld unsuccessfully owing to lacking inner support.Therefore propose a kind of effectively thin-wall aluminum alloy sealing method for tube end and device to have important practical significance.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of thin-wall aluminum alloy pipe end soldering and sealing device and welding method, employing H type weld seam is disposable completes welding, ensures again the air-tightness of quality and the aluminium-alloy pipe welded while ensure that the precision of welding.
Technical scheme: for solving the problems of the technologies described above, a kind of thin-wall aluminum alloy pipe end soldering and sealing device of the present invention, comprise the turning rolls group for supporting thin-wall aluminum alloy pipe and aluminium alloy bars, one end of described aluminium alloy bars is fixed by the chuck being arranged on the hollow on rolling clamp, aluminium alloy bars is provided with top through one end of chuck, the aluminium alloy bars other end is the axle body that diameter is less than aluminium alloy bars, axle body and aluminium alloy bars form the shaft shoulder, axle body is inserted in thin-wall aluminum alloy pipe, axle body and thin-wall aluminum alloy pipe are interference fit, above thin-wall aluminum alloy pipe, stirring-head is installed, pass through friction stir welding, thin-wall aluminum alloy pipe is formed H type weld seam.
As preferably, the magnitude of interference of described axle body and thin-wall aluminum alloy pipe is δ, δ=(t-t
0) × α × l-δ
0, wherein, δ
0the temperature of thin-wall aluminum alloy pipe when=(1 ~ 2) * δ, t are assembling, t
0for heating before environment temperature, α be heating time workpiece be radially expanded coefficient, l--is by the internal diameter of bottoming hole.
As preferably, the length of described axle body is not less than 3.5 times of stirring-head diameter, and mixing needle length is not less than the thin-wall aluminum alloy thickness of pipe wall of 1.5 times.
As preferably, described H type weld seam comprises first girth joint and second girth joint, and first girth joint completes the overlap welding of aluminium-alloy pipe and the shaft shoulder, and second girth joint completes the butt welding of aluminium-alloy pipe and aluminium alloy bars.
A welding method for above-mentioned thin-wall aluminum alloy pipe end soldering and sealing device, comprises the following steps:
(1) δ=(t-t according to actual needs, is utilized
0) × α × l-δ
0determine the diameter of magnitude of interference δ and axle body, choose suitable axle body length, process satisfactory aluminium alloy bars, select suitable mixing needle length according to thin-wall aluminum alloy thickness of pipe wall;
(2) thin-wall aluminum alloy pipe is heated to 100 DEG C, then assembling thin-wall aluminum alloy pipe and aluminium alloy bars are air-dry after also cooling fast rapidly;
(3) workpiece assembled passed rolling clamp and fix with chuck, remainder is then arranged in turning rolls group and operates with rolling clamp, adjustment stirring-head makes it aim at the axis of thin-wall aluminum alloy pipe and aluminium alloy bars vertically downward, and the distance at stirring-head centre distance axle body edge is greater than and equals D, wherein D is the diameter of stirring-head, and mixing needle is positioned at directly over axle body end;
(4) first stirring-head is started, and make it slowly be pressed into welded region to carry out preheating, preheating terminates rear beginning rotary chuck, the welding overlapping girth joint after chuck rotates a circle completes, now stop the rotation of chuck, mixing needle continues keep high-speed rotation and weld a segment distance along aluminium alloy bars axis to aluminium alloy bars side level, until aluminium-alloy pipe and aluminium alloy bars joint stop mobile, prepares the welding starting butt girth welding seam;
(5) again slowly rotating chuck and direction of rotation with consistent before, after chuck rotates a circle, the welding of butt girth welding seam completes, now stop the rotation of chuck, stirring-head continues to keep high-speed rotation and after moving horizontally a bit of distance to aluminium alloy bars side, slowly promote stirring-head, until mixing needle stops the rotation of stirring-head again after departing from weld seam completely, the welding of this side pipe end terminates;
(6) according to step (1) and (2), process identical axle body, assemble thin-wall aluminum alloy pipe and aluminium alloy bars;
(7) again the thin-wall aluminum alloy pipe assembled and aluminium alloy bars are repeated step (3) to (5), the soldering and sealing at thin-wall aluminum alloy pipe two ends can be completed.
As preferably, in described step (4) or step (5), stirring-head and aluminium alloy bars observe the direction of rotation of chuck along X-axis forward, observe the direction of rotation of stirring-head along Z axis negative sense simultaneously, if chuck counterclockwise rotates, if then mixing needle must rotate or rotates clockwise from the angle views chuck of left view clockwise, then must counterclockwise rotate from the angle views mixing needle of top view, wherein, X-axis is the axis of aluminium alloy bars, be forward away from thin-wall aluminum alloy pipe, Z axis is the axis of mixing needle, is forward away from aluminium alloy bars.
In the present invention, thin-wall aluminum alloy pipe does not adopt clamping or bracing or strutting arrangement, only with aluminium alloy bars interference fit, when ensureing initial weld, on the one hand, can fit tightly between aluminium-alloy pipe and aluminium alloy bars; On the other hand, axial relative movement is between the two stoped by interference fit; During normal weld, completed weld seam progressively can strengthen the bonding strength between aluminium-alloy pipe and aluminium alloy bars.The selection of this interference fit is compared with method conventional in machinery, do not need the larger magnitude of interference, it is inner that mixing needle inserts lap weld, effect that mixing needle inherently plays " pinning ", do not need too strong strength to stop both axial relative movements, in addition in welding process, Fit is in high temperature (about 500 DEG C), and the excessive magnitude of interference can cause tension very strong on aluminium-alloy pipe, is unfavorable for appearance of weld.And when selecting the magnitude of interference of conventional aluminum alloys material, due at the temperature of 100 DEG C, aluminium alloy, than steel, is softer, therefore, needs the larger magnitude of interference.
Beneficial effect: thin-wall aluminum alloy pipe end soldering and sealing device of the present invention and welding method, have the following advantages:
(1) effectively can complete the weld task of thin-walled pipe end, be particularly useful for the particular/special requirement of end sealing;
(2) do not use inner swelling device, thin-wall aluminum alloy pipe two ends are not held out against and be fixed, utilize and thin-wall aluminum alloy tube swelling is made to the heating of thin-wall aluminum alloy pipe, aluminium alloy bars is inserted in thin-wall aluminum alloy pipe, overcome the shortcoming that thin-wall pipe rigidity is low, torsional property is poor, in the welding of other materials thin-wall pipe, there is versatility;
(3) employing H type weld seam is disposable completes welding, ensures again the air-tightness of quality and the aluminium-alloy pipe welded while ensure that the precision of welding;
(4) structure is simple, practical, and the method and device easily realize and easy to assembly, and this has important practical significance to the application realizing the soldering and sealing of thin-wall aluminum alloy pipe end.
Accompanying drawing explanation
Fig. 1 is thin-wall aluminum alloy pipe end soldering and sealing device overall schematic;
Fig. 2 is H type weld seam front view;
Fig. 3 is H type weld seam A-A schematic cross-section;
Fig. 4 is welding point cross-sectional view;
Fig. 5 is advance side and retrogressing side position schematic diagram;
Fig. 6 is that welded piece coordinates schematic diagram with the direction of rotation of mixing needle.
In Fig. 1,1-aluminium-alloy pipe; 2-mixing needle; 3-stirring-head; 4-H type weld seam; 5-aluminium alloy bars; 6-chuck; 7-turning rolls group; 8-rolling clamp; 9-is top; 10 axle bodies; Be sewn to the transition weld seam of second girth joint by first boxing in 4-2H type weld seam; 4-1 is first girth joint in H type weld seam; 4-3 is second girth joint in H type weld seam.
Detailed description of the invention
As shown in Figures 1 to 6, a kind of thin-wall aluminum alloy pipe end soldering and sealing device of the present invention, comprise the turning rolls group 7 for supporting thin-wall aluminum alloy pipe 1 and aluminium alloy bars 5, one end of described aluminium alloy bars 5 is fixed by the chuck 6 being arranged on the hollow on rolling clamp 8, aluminium alloy bars 5 is provided with top 9 through one end of chuck 6, aluminium alloy bars 5 other end is the axle body 10 that diameter is less than aluminium alloy bars 5, axle body 10 and aluminium alloy bars form the shaft shoulder, axle body 10 is inserted in thin-wall aluminum alloy pipe 1, axle body 10 and thin-wall aluminum alloy pipe 1 are interference fit, stirring-head 3 is installed above thin-wall aluminum alloy pipe 1, mixing needle 2 and stirring-head 3 are integrated, thin-wall aluminum alloy pipe 1 is formed H type weld seam 4.
In the present invention, described axle body 10 is δ, δ=(t-t with the magnitude of interference of thin-wall aluminum alloy pipe 1
0) × α × l-δ
0, wherein, δ
0temperature when=(1 ~ 2) * δ, t are assembling, t
0for heating before environment temperature, α be heating time workpiece be radially expanded coefficient, l--is by the internal diameter of bottoming hole.The length of described axle body 10 is not less than 3.5 times of stirring-head 3 diameter, and mixing needle 2 length is not less than thin-wall aluminum alloy pipe 1 wall thickness of 1.5 times.The first girth joint 4-1 of described H type weld seam 4 completes the overlap welding of aluminium-alloy pipe 1 and the shaft shoulder, the second girth joint 4-3 of H type weld seam 4 completes the butt welding of aluminium-alloy pipe 1 and aluminium alloy bars, and in H type weld seam, first girth joint 4-1 to second girth joint 4-3 is transition weld seam 4-2.
Wherein, mixing needle 2 on stirring-head 3 rigidly fixes connection, the spinning movement of stirring-head 3, X-axis, Y-axis, Z axis adjustment function all can adopt friction stir welding machine on the market to realize, wherein, X-axis is the axis of aluminium alloy bars, be forward away from thin-wall aluminum alloy pipe, Z axis is the axis of mixing needle, is forward away from aluminium alloy bars.Described X-axis is stirring-head 3 lengthwise movement, realizes the quick position of weld seam, adopts " servomotor+ball-screw+straight ball-guide " transmission.Described Y-axis is stirring-head 3 transverse movement, realize stirring-head 3, lateral attitude adjustment and handling stirring-head 3, adopt " manual trapezoidal screw+straight ball-guide " transmission.Described Z axis is that main tapping moves both vertically, and realizes the insertion of stirring-head 3, adopts " servomotor+worm reducer+ball-screw " transmission.Described weld jig rotating shaft, realizes the rotation of aluminium alloy bars 5 and aluminium-alloy pipe 1, adopts " servomotor+planet-cycloid reducer " to drive.The rotating shaft of described stirring-head 3, can by motor direct-drive.
In the present invention, chuck 6 is fixed on rolling clamp 8, and chuck 6 is for clamping aluminium alloy bars 5, and rolling clamp 8 is necessary for hollow, and can pass aluminium alloy bars.Top 9 are mainly used to promote the feeding of aluminium alloy bars, so select piston type pneumatic top 9 and the motive force of the pneumatic finial 9 selected can be less.Described turning rolls group 7, can regulate distance between roller, to adapt to the pipe fitting of different-diameter in Y-direction.
About advance side and the definition retreating side: during welding, workpiece and stirring-head are all rotate, because on rotating object, the direction of motion of any point is the tangential of residing circumference.As shown in Figure 5, the circumference therefore when welding region place metal on surface of circular tube workpiece is tangential, and with (corresponding to tangential 15) during stirring-head circumferentially tangential identical, with the axis of a weld 12 on workpiece for boundary, this side is for retreating side; When the circumference of welding region place metal on surface of circular tube workpiece is tangential, with (corresponding to tangential 16) during stirring-head circumferentially tangential contrary, with the axis of a weld 12 on workpiece for boundary, this side is advance side.Determining the direction of rotation of stirring-head 3 and chuck 6: should make weld seam advance side relative to retreating side shaft to sequence of positions, is sequentially the same with aluminium alloy bars relative to the axial location of aluminium-alloy pipe, as shown in Figure 6.Suppose the direction of rotation of the angle views chuck 6 from left view, simultaneously from the direction of rotation of the angle views stirring-head 3 of top view, if chuck 6 counterclockwise rotates, then mixing needle 2 must rotate clockwise; Otherwise, if rotate clockwise from the angle views chuck 6 of left view, then must counterclockwise rotate from the angle views mixing needle 2 of top view.
A welding method for above-mentioned thin-wall aluminum alloy pipe 1 end soldering and sealing device, comprises the following steps:
(1) δ=(t-t according to actual needs, is utilized
0) × α × l-δ
0determine the diameter of magnitude of interference δ and axle body 10, choose suitable axle body 10 length, process satisfactory aluminium alloy bars 5, select suitable mixing needle 2 according to thin-wall aluminum alloy pipe 1 wall thickness;
(2) thin-wall aluminum alloy pipe 1 is heated to 100 DEG C, then assembling thin-wall aluminum alloy pipe 1 and aluminium alloy bars 5 are air-dry after also cooling fast rapidly;
(3) workpiece assembled also is fixed with chuck 6 through rolling clamp 8, remainder is then arranged in turning rolls group 7 and operates with rolling clamp 8, adjustment mixing needle 2 makes it aim at the axis of thin-wall aluminum alloy pipe 1 and aluminium alloy bars 5 vertically downward, and the mixing needle 2 distance axis at one's side distance of edge is greater than and equals D, wherein D is the diameter of stirring-head 3, and mixing needle 2 is positioned at directly over axle body 10 end;
(4) first stirring-head 3 is started, and make it slowly be pressed into welded region to carry out preheating, preheating terminates rear beginning rotary chuck 6, the welding overlapping girth joint after chuck 6 rotates a circle completes, now stop the rotation of chuck 6, mixing needle 2 continues keep high-speed rotation and weld a segment distance along aluminium alloy bars axis to aluminium alloy bars side level, until aluminium-alloy pipe 1 and aluminium alloy bars joint stop mobile, prepares the welding starting butt girth welding seam;
(5) again slowly rotating chuck 6 and direction of rotation with consistent before, after chuck 6 rotates a circle, the welding of butt girth welding seam completes, now stop the rotation of chuck 6, stirring-head 3 continues to keep high-speed rotation and after moving horizontally a bit of distance to aluminium alloy bars side, slowly promote stirring-head 3, until mixing needle 2 stops the rotation of stirring-head 3 again after departing from weld seam completely, the welding of this side pipe end terminates;
(6) according to step (1) and (2), process identical axle body 10, assemble thin-wall aluminum alloy pipe 1 and aluminium alloy bars;
(7) again the thin-wall aluminum alloy pipe 1 assembled and aluminium alloy bars are repeated step (3) to (5), the soldering and sealing at thin-wall aluminum alloy pipe 1 two ends can be completed.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. a thin-wall aluminum alloy pipe end soldering and sealing device, it is characterized in that: comprise the turning rolls group for supporting thin-wall aluminum alloy pipe and aluminium alloy bars, one end of described aluminium alloy bars is fixed by the chuck being arranged on the hollow on rolling clamp, aluminium alloy bars is provided with top through one end of chuck, the aluminium alloy bars other end is the axle body that diameter is less than aluminium alloy bars, axle body and aluminium alloy bars form the shaft shoulder, axle body is inserted in thin-wall aluminum alloy pipe, axle body and thin-wall aluminum alloy pipe are interference fit, above thin-wall aluminum alloy pipe, stirring-head is installed, pass through friction stir welding, thin-wall aluminum alloy pipe is formed H type weld seam, thus realize the soldering and sealing of thin-wall aluminum alloy pipe end.
2. thin-wall aluminum alloy pipe end soldering and sealing device according to claim 1, is characterized in that: the magnitude of interference of described axle body and thin-wall aluminum alloy pipe is δ, δ=(t-t
0) × α × l-δ
0, wherein, δ
0the temperature of thin-wall aluminum alloy pipe when=(1 ~ 2) * δ, t are assembling, t
0for heating before environment temperature, α be heating time workpiece be radially expanded coefficient, l--is by the internal diameter of bottoming hole.
3. thin-wall aluminum alloy pipe end soldering and sealing device according to claim 2, is characterized in that: the length of described axle body is not less than 3.5 times of stirring-head diameter, and mixing needle length is not less than the thin-wall aluminum alloy thickness of pipe wall of 1.5 times.
4. thin-wall aluminum alloy pipe end soldering and sealing device according to claim 3, it is characterized in that: described H type weld seam comprises first girth joint and second girth joint, first girth joint completes the overlap welding of aluminium-alloy pipe and the shaft shoulder, and second girth joint completes the butt welding of aluminium-alloy pipe and aluminium alloy bars.
5. as described in the welding method of thin-wall aluminum alloy pipe end soldering and sealing device according to claim 4, it is characterized in that, comprise the following steps:
(1) δ=(t-t according to actual needs, is utilized
0) × α × l-δ
0determine the diameter of magnitude of interference δ and axle body, choose suitable axle body length, process satisfactory aluminium alloy bars, select the length of suitable mixing needle according to thin-wall aluminum alloy thickness of pipe wall;
(2) thin-wall aluminum alloy pipe is heated to 100 DEG C, then assembling thin-wall aluminum alloy pipe and aluminium alloy bars are air-dry after also cooling fast rapidly;
(3) workpiece assembled passed rolling clamp and fix with chuck, remainder is then arranged in turning rolls group and operates with rolling clamp, adjustment stirring-head makes it aim at the axis of thin-wall aluminum alloy pipe and aluminium alloy bars vertically downward, and the mixing needle distance axis at one's side distance of edge is greater than and equals D, wherein D is the diameter of stirring-head, and stirring-head is positioned at directly over axle body end;
(4) first stirring-head is started, and make it slowly be pressed into welded region to carry out preheating, preheating terminates rear beginning rotary chuck, the welding overlapping girth joint after chuck rotates a circle completes, now stop the rotation of chuck, mixing needle continues keep high-speed rotation and weld a segment distance along aluminium alloy bars axis to aluminium alloy bars side level, until aluminium-alloy pipe and aluminium alloy bars joint stop mobile, prepares the welding starting butt girth welding seam;
(5) again slowly rotating chuck and direction of rotation with consistent before, after chuck rotates a circle, the welding of butt girth welding seam completes, now stop the rotation of chuck, stirring-head continues to keep high-speed rotation and after moving horizontally a bit of distance to aluminium alloy bars side, slowly promote stirring-head, until mixing needle stops the rotation of stirring-head again after departing from weld seam completely, the welding of this side pipe end terminates;
(6) according to step (1) and (2), process identical axle body, assemble thin-wall aluminum alloy pipe and aluminium alloy bars;
(7) again the thin-wall aluminum alloy pipe assembled and aluminium alloy bars are repeated step (3) to (5), the soldering and sealing at thin-wall aluminum alloy pipe two ends can be completed.
6. thin-wall aluminum alloy pipe end soldering and sealing device according to claim 5, it is characterized in that: in described step (4) or step (5), stirring-head and aluminium alloy bars observe the direction of rotation of chuck along X-axis forward, observe the direction of rotation of stirring-head along Z axis negative sense simultaneously, if chuck counterclockwise rotates, if then mixing needle must rotate or rotates clockwise from the angle views chuck of left view clockwise, then must counterclockwise rotate from the angle views mixing needle of top view, wherein, X-axis is the axis of aluminium alloy bars, be forward away from thin-wall aluminum alloy pipe, Z axis is the axis of mixing needle, be forward away from aluminium alloy bars.
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| CN105710541A (en) * | 2016-04-12 | 2016-06-29 | 燕山大学 | Butt-joint friction welding device based on large-caliber welded pipe pulsed current heating |
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| CN113510359A (en) * | 2021-07-12 | 2021-10-19 | 京浜乐梦金属科技（苏州）有限公司 | Pipe friction stir welding method and friction stir welding machine |
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