CN104959727A - Composite sealing device for thin-wall aluminum alloy pipe ends and welding method thereof - Google Patents
Composite sealing device for thin-wall aluminum alloy pipe ends and welding method thereof Download PDFInfo
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- CN104959727A CN104959727A CN201510454270.4A CN201510454270A CN104959727A CN 104959727 A CN104959727 A CN 104959727A CN 201510454270 A CN201510454270 A CN 201510454270A CN 104959727 A CN104959727 A CN 104959727A
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- aluminum alloy
- wall aluminum
- alloy pipe
- aluminium alloy
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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
- B23K20/126—Workpiece support, i.e. backing or clamping
-
- 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
- B23K20/22—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded
- B23K20/233—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded without ferrous layer
- B23K20/2336—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded without ferrous layer both layers being aluminium
-
- 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
- B23K20/24—Preliminary treatment
-
- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/047—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work moving work to adjust its position between soldering, welding or cutting steps
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
-
- 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
Abstract
The invention discloses a composite sealing device for thin-wall aluminum alloy pipe ends and a welding method thereof. The composite sealing device comprises a roller carrier set used for supporting a thin-wall aluminum alloy pipe and an aluminum alloy rod. One end of the aluminum alloy rod is fixed through a hollow chuck mounted on a rotating clamp, a tip is mounted at the end, penetrating through the chuck, of the aluminum alloy rod, and the other end of the aluminum alloy rod is inserted into the thin-wall aluminum alloy pipe. The aluminum alloy rod and the thin-wall aluminum alloy pipe are in interference fit, a stirring needle is arranged on the upper portion of the interference fit position of the aluminum alloy rod and the thin-wall aluminum alloy pipe, and the stirring needle is fixedly connected with a stirring head. According to the composite sealing device for the thin-wall aluminum alloy pipe ends and the welding method thereof, no inner tensioning device is used, the two ends of the thin-wall aluminum alloy pipe are not ejected or fixed, the thin-wall aluminum alloy pipe is made to be expanded by heating the thin-wall aluminum alloy pipe, the aluminum alloy rod with the temperature being lower than an indoor temperature is inserted into the thin-wall aluminum alloy pipe, the defects that a thin-wall pipe is low in rigidity and poor in torsional property are overcome, and universality can be achieved in welding of thin-wall pipes made of other materials.
Description
Technical field
The present invention relates to a kind of thin-wall aluminum alloy pipe end composite seal 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 composite seal device and welding method, do not use inner swelling device, thin-wall aluminum alloy pipe two ends are not held out against and be fixed, overcome the shortcoming that thin-wall pipe rigidity is low, torsional property is poor.
Technical scheme: for solving the problems of the technologies described above, a kind of thin-wall aluminum alloy pipe end composite seal 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 described aluminium alloy bars other end is inserted in thin-wall aluminum alloy pipe, aluminium alloy bars and thin-wall aluminum alloy pipe are interference fit, above aluminium alloy bars and thin-wall aluminum alloy pipe cooperation place, mixing needle is installed, mixing needle is connected with stirring-head.
As preferably, described aluminium alloy bars is provided with several annular seal grooves, and the annular seal groove part near thin-wall aluminum alloy pipe is positioned at thin-wall aluminum alloy pipe, and the distance of adjacent annular seal groove is not less than 1.5 times of stirring-head diameter.
As preferably, described annular seal groove longitudinal section is isosceles trapezoid shape, and away from aluminium alloy bars is the upper base of isosceles trapezoid, and upper base is the twice of going to the bottom, and the base angle of isosceles trapezoid is 45 °.
As preferably, described upper base length is:
Work as 0<d
0during <10mm, H=0.8d
0;
As 10≤d
0during≤50mm, H=0.6d
0;
Work as d
0when being greater than 50mm, H=0.4d
0, d
0for the diameter of aluminium alloy bars.
As preferably, the magnitude of interference of described aluminium alloy bars and thin-wall aluminum alloy pipe is δ, δ=(t-t
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.
As preferably, the length that described aluminium alloy bars stretches into thin-wall aluminum alloy pipe is not less than 1.5 times of stirring-head diameter, and the length of mixing needle is not less than the wall thickness of 1.5 times of thin-wall aluminum alloy pipes.
A welding method for above-mentioned thin-wall aluminum alloy pipe end composite seal device, comprises the following steps:
(1) δ=(t-t according to actual needs, is utilized
0) × α × l-δ
0determine magnitude of interference δ, process satisfactory aluminium alloy bars, select 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, residing for aluminium alloy aluminium alloy bars, temperature is lower than room temperature, then assemble rapidly thin-wall aluminum alloy pipe and the also cooling fast of aluminium alloy aluminium alloy bars, make the half width entering the annular seal groove in pipe stretch out aluminium alloy pipe end;
(3) workpiece assembled passed rolling clamp and fix with chuck, remainder is then arranged in turning rolls group and operates with rolling clamp;
(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, and stop the rotation after workpiece is rotated a circle chuck, extract stirring-head out slowly, the rotation of stirring-head can be stopped after mixing needle departs from workpiece completely;
(5) along thin-wall aluminum alloy pipe end excision aluminium alloy bars, in keyhole and annular seal groove, fill up fluid sealant, wait for that it solidifies completely;
(6) other end of thin-wall aluminum alloy pipe repeats step (2) ~ (5), then complete the compound seal at thin-wall aluminum alloy pipe end two ends.
In the present invention, select dovetail groove, opposing circular groove, dovetail groove is easy to processing; After inserting sealed colloid, the colloidal volume that the groove of circular shape can hold is less, also less with the contact area of aluminium alloy bars, is easy to come off under external force; The length of upper base determines the contact area of the volume of fluid sealant, fluid sealant and aluminium-alloy pipe, aluminium alloy aluminium alloy bars, therefore according to the diameter of aluminium alloy bars, must determine the seal groove of certain volume and shape.Therefore upper base is too little, and fluid sealant volume is too little, does not play sealing effectiveness; Upper base is larger, and sealing effectiveness can be better; But upper base is not the bigger the better, too large can cause waste, also can hollow out aluminium alloy bars.
In this patent, 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, this is because: 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 composite seal device of the present invention and welding method, have the following advantages:
(1) 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 aluminium alloy bars lower than room temperature 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.
(2) adopt the mode of agitating friction overlap welding and fluid sealant combination to complete the sealing of pipe end, both ensure that the intensity of welding point in turn ensure that the air-tightness of aluminium alloy pipe end.
(3) 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 thin-wall aluminum alloy end sealing.
Accompanying drawing explanation
Fig. 1 is thin-wall aluminum alloy pipe end compound soldering and sealing device overall schematic;
Fig. 2 is welding point front view and each parts direction of rotation thereof;
Fig. 3 is welding point cross-sectional view;
Fig. 4 amplifies 2 times of schematic diagrames with the aluminium alloy bars cross section of annular seal groove.
Detailed description of the invention
As shown in Figures 1 to 4, a kind of thin-wall aluminum alloy pipe end composite seal device of the present invention, comprise the turning rolls group 10 for supporting thin-wall aluminum alloy pipe 1 and aluminium alloy bars 6, one end of described aluminium alloy bars 6 is fixed by the chuck 7 being arranged on the hollow on rolling clamp 8, aluminium alloy bars 6 is provided with top 9 through one end of chuck 7, described aluminium alloy bars 6 other end is inserted in thin-wall aluminum alloy pipe 1, aluminium alloy bars 6 and thin-wall aluminum alloy pipe 1 are interference fit, above aluminium alloy bars 6 with thin-wall aluminum alloy pipe 1 cooperation place, mixing needle 2 is installed, mixing needle 2 is connected with stirring-head 3.
In the present invention, described aluminium alloy bars 6 is provided with five annular seal grooves 5, annular seal groove 5 half near thin-wall aluminum alloy pipe 1 is positioned at thin-wall aluminum alloy pipe 1, the distance of adjacent annular seal groove 5 is 1.5 times of stirring-head 3 diameter, described annular seal groove 5 longitudinal section is isosceles trapezoid shape, away from aluminium alloy bars 6 central shaft is the upper base of isosceles trapezoid, and upper base is the twice of going to the bottom, and the base angle of isosceles trapezoid is 45 °.
In the present invention, described upper base length is: work as 0<d
0during <10mm, H=0.8d
0; As 10≤d
0during≤50mm, H=0.6d
0; Work as d
0when being greater than 50mm, H=0.4d
0, d
0for the diameter of aluminium alloy bars 6.
In the present invention, described aluminium alloy bars 6 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 that described aluminium alloy bars 6 stretches into thin-wall aluminum alloy pipe 1 is 1.5 times of stirring-head 3 diameter, and the length of mixing needle 2 is the wall thickness of 1.5 times of thin-wall aluminum alloy pipes 1.
Mixing needle 2 on stirring-head 3 rigidly fixes connection, and 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.Described X-axis is stirring-head 3 lengthwise movement, realizes the quick position of weld seam 4, 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 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, pneumatic finial 9 is mainly used to the feeding promoting aluminium alloy aluminium alloy bars 6, so select piston type pneumatic top 9 and the motive force of the pneumatic finial 9 selected can be less.Described turning rolls group 10, can regulate distance between roller, to adapt to the pipe fitting of different-diameter in Y-direction.
In the present invention, determine the direction of rotation of stirring-head 3 and chuck 7: as shown in Figure 2, suppose the direction of rotation of the angle views chuck 7 from left view, simultaneously from the direction of rotation of the angle views stirring-head 3 of top view, if chuck 7 counterclockwise rotates, then stirring-head 3 must rotate clockwise; Otherwise, if rotate clockwise from the angle views chuck 7 of left view, then must rotate clockwise from the angle views stirring-head 3 of top view.
A welding method for above-mentioned thin-wall aluminum alloy pipe end composite seal device, comprises the following steps:
(1) δ=(t-t according to actual needs, is utilized
0) × α × l-δ
0determine magnitude of interference δ, process satisfactory aluminium alloy bars 6, 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, residing for aluminium alloy aluminium alloy bars 6, temperature is lower than room temperature, then assemble rapidly thin-wall aluminum alloy pipe 1 and aluminium alloy aluminium alloy bars 6 also cooling fast, make a half width of the annular seal groove 5 entered in pipe stretch out aluminium-alloy pipe 1 end;
(3) also fixed with chuck 7 through rolling clamp 8 by the workpiece assembled, remainder is then arranged in turning rolls group 10 and operates with rolling clamp 8;
(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 7, and stop the rotation after workpiece is rotated a circle chuck 7, extract stirring-head 3 out slowly, the rotation of stirring-head 3 can be stopped after mixing needle 2 departs from workpiece completely;
(5) along thin-wall aluminum alloy pipe 1 tip cut-off aluminium alloy bars, in keyhole and annular seal groove 5, fill up fluid sealant, wait for that it solidifies completely;
(6) other end of thin-wall aluminum alloy pipe 1 repeats step (2) ~ (5), then complete the compound seal at thin-wall aluminum alloy pipe 1 end two ends.
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 (7)
1. a thin-wall aluminum alloy pipe end composite seal 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 described aluminium alloy bars other end is inserted in thin-wall aluminum alloy pipe, aluminium alloy bars and thin-wall aluminum alloy pipe are that the top being interference fitted in aluminium alloy bars and thin-wall aluminum alloy pipe cooperation place is provided with mixing needle, and mixing needle is connected with stirring-head.
2. thin-wall aluminum alloy pipe end composite seal device according to claim 1, it is characterized in that: described aluminium alloy bars is provided with several annular seal grooves, an annular seal groove part near thin-wall aluminum alloy pipe is positioned at thin-wall aluminum alloy pipe, and the distance of adjacent annular seal groove is not less than 1.5 times of stirring-head diameter.
3. thin-wall aluminum alloy pipe end composite seal device according to claim 2, it is characterized in that: described annular seal groove longitudinal section is isosceles trapezoid shape, away from aluminium alloy bars is the upper base of isosceles trapezoid, and upper base is the twice of going to the bottom, and the base angle of isosceles trapezoid is 45 °.
4. thin-wall aluminum alloy pipe end composite seal device according to claim 3, is characterized in that: described upper base length is:
Work as 0<d
0during <10mm, H=0.8d
0;
As 10≤d
0during≤50mm, H=0.6d
0;
Work as d
0when being greater than 50mm, H=0.4d
0, d
0for the diameter of aluminium alloy bars.
5. thin-wall aluminum alloy pipe end composite seal device according to claim 4, is characterized in that: the magnitude of interference of described aluminium alloy bars and thin-wall aluminum alloy pipe is δ, δ=(t-t
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.
6. thin-wall aluminum alloy pipe end composite seal device according to claim 5, it is characterized in that: the length that described aluminium alloy bars stretches into thin-wall aluminum alloy pipe is not less than 1.5 times of stirring-head diameter, and the length of mixing needle is not less than the wall thickness of 1.5 times of thin-wall aluminum alloy pipes.
7., as right wants a welding method for thin-wall aluminum alloy pipe end composite seal device as described in 6, it is characterized in that, comprise the following steps:
(1) δ=(t-t according to actual needs, is utilized
0) × α × l-δ
0determine magnitude of interference δ, process satisfactory aluminium alloy bars, select 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, residing for aluminium alloy aluminium alloy bars, temperature is lower than room temperature, then assemble rapidly thin-wall aluminum alloy pipe and the also cooling fast of aluminium alloy aluminium alloy bars, make the half width entering the annular seal groove in pipe stretch out aluminium alloy pipe end;
(3) workpiece assembled passed rolling clamp and fix with chuck, remainder is then arranged in turning rolls group and operates with rolling clamp;
(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, and stop the rotation after workpiece is rotated a circle chuck, extract stirring-head out slowly, the rotation of stirring-head can be stopped after mixing needle departs from workpiece completely;
(5) along thin-wall aluminum alloy pipe end excision aluminium alloy bars, in keyhole and annular seal groove, fill up fluid sealant, wait for that it solidifies completely;
(6) other end of thin-wall aluminum alloy pipe repeats step (2) ~ (5), then complete the compound seal at thin-wall aluminum alloy pipe end two ends.
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| CN106141454A (en) * | 2016-08-31 | 2016-11-23 | 武汉天琪激光设备制造有限公司 | A kind of cutting head with detent mechanism, cutter sweep and cutting method |
| CN107457508A (en) * | 2017-07-31 | 2017-12-12 | 浩科机器人（苏州）有限公司 | A kind of efficient, full rotation type intellectuality welding equipment and its method of work |
| WO2017215525A1 (en) * | 2016-06-12 | 2017-12-21 | 上海航天设备制造总厂 | Double-sided welding and double-sided shaping method for large-diameter aluminum alloy tube-making helical friction stir welding (fsw) equipment |
| CN112882186A (en) * | 2021-01-22 | 2021-06-01 | 西安应用光学研究所 | Welding fixing structure and fixing method suitable for adjustable reflector group |
| CN112872637A (en) * | 2020-12-28 | 2021-06-01 | 中国原子能科学研究院 | Device and method for welding sealing cylinder of driving motor |
| CN113042856A (en) * | 2021-03-24 | 2021-06-29 | 广州祈信金属制品有限公司 | Thin pipe end face welding process |
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