CN104985320B - Friction-stir welding equipment - Google Patents

Friction-stir welding equipment Download PDF

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Publication number
CN104985320B
CN104985320B CN201510375127.6A CN201510375127A CN104985320B CN 104985320 B CN104985320 B CN 104985320B CN 201510375127 A CN201510375127 A CN 201510375127A CN 104985320 B CN104985320 B CN 104985320B
Authority
CN
China
Prior art keywords
head
stirring
connection
propulsive
agitating friction
Prior art date
Application number
CN201510375127.6A
Other languages
Chinese (zh)
Other versions
CN104985320A (en
Inventor
唐远金
陈康
李力
杜彦斌
黄木春
赵学渝
Original Assignee
重庆派馨特机电有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 重庆派馨特机电有限公司 filed Critical 重庆派馨特机电有限公司
Priority to CN201510375127.6A priority Critical patent/CN104985320B/en
Publication of CN104985320A publication Critical patent/CN104985320A/en
Application granted granted Critical
Publication of CN104985320B publication Critical patent/CN104985320B/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12Non-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
    • B23K20/122Non-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
    • B23K20/1245Non-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 provides friction-stir welding equipment. The friction-stir welding equipment comprises a machine tool body for friction-stir welding. A stir head is installed on a spindle of the machine tool body. A floating supporting structure is arranged between the stir head and the spindle and comprises a connecting component and an elastic supporting piece. The connecting component is fixed to the spindle, the lower portion of the connecting component and the upper portion of the stir head are matched through a plurality of concave parts and convex parts, and the connecting component and the stir head can rotate synchronously. The elastic supporting piece is arranged between the lower end of the connecting component and the upper end of the stir head in an abutting mode. A limiting structure is arranged on the connecting component and used for preventing the stir head from disengaging from the lower end of the connecting component. The friction-stir welding equipment can keep pressure constant in welding and improve the quality of welded joints. When disturbance or other accidents occur, torsion or impact force on the stir head can be reduced, so that the stir head is easy to protect and not prone to fracture, and the service life of the stir head is prolonged. The structure of the spindle is simplified, so that the whole equipment has a light weight and a small size, materials are saved, and cost is lowered.

Description

A kind of agitating friction soldering equipment
Technical field
The present invention relates to agitating friction weldering apparatus field, more particularly to a kind of agitating friction soldering equipment.
Background technology
Agitating friction weldering is the patent of invention that Britain's institute of welding was proposed in October, 1991.Friction stir welding is most Just it is mainly used in the welding for solving the low melting materials such as aluminium alloy.As a kind of advanced solid phase joining technique, agitating friction weldering It is widely used in the fields such as Aero-Space, track traffic, defence and military, steamer automobile.During agitating friction weldering, using stirring The position to be welded of head insertion workpiece, by the agitating friction between stirring-head and workpiece, frictional heat makes the position metal in heat Mecystasises and under the pressure effect of stirring-head from its front end posteriorly Plastic Flow so that part to be welded be welded as one whole Body.
During actual agitating friction weldering, the agitating friction soldering equipment of industrial employing often adopts workbench not Dynamic, intermetallic welding is realized by the motion of the multiple directions such as the X-axis of stirring-head, Y-axis, so as to equipment volume is more huge and Heaviness, causes equipment production cost higher, significantly limit application of the agitating friction welding technology in civilian industry field, hinders The all-round popularization of agitating friction welding technology and large-scale application.Additionally, during existing agitating friction weldering equipment operation, mixing needle All it is to adopt rigid contact and mother metal between, when there are the fortuitous events such as disturbance, mixing needle easily ruptures, and causes stirring-head report Useless, the service life of stirring-head is had a strong impact on, and increases the production cost of enterprise.For this purpose, a kind of in appearance in the urgent need to providing During the fortuitous events such as disturbance, the agitating friction soldering equipment that stirring-head bears torsion or impulsive force can be mitigated, effectively extend stirring-head Service life, improve welding production efficiency, reduce enterprise's production capacity.
Content of the invention
The deficiencies in the prior art in view of the above, it is an object of the invention to provide a kind of agitating friction soldering equipment, When there are the fortuitous events such as disturbance, stirring-head is protected, mitigate torsion or impulsive force that stirring-head bears, extend its service life.
For achieving the above object and other related purposes, the present invention provides a kind of agitating friction soldering equipment, including for stirring The machine body of friction welding (FW) is mixed, stirring-head is installed on the main shaft of machine body, arranged between the stirring-head and main shaft There is floating support structure, the floating support structure includes connection member and elastic supporting member for supporting optical member, the connection member is solid with main shaft Fixed, the connection member bottom is coordinated by multiple recesses and convex portion with stirring-head top, and energy synchronous axial system, the elasticity Support member is withstood between connection member lower end and stirring-head upper end, and is provided with the connection member and is prevented stirring-head from connecting portion The position limiting structure of part lower end abjection.
Using said structure:On the one hand, pressure energy can be caused during welding to keep constant, improves quality of weld joint;Another Aspect, when there are the fortuitous events such as disturbance, floating support structure can mitigate torsion or the impulsive force that stirring-head bears, and easily protect Stirring-head so as to not easy fracture, extends stirring-head service life.
As preferred:The connection member is column, and connection member lower surface center offers support member installing hole, The elastic supporting member for supporting optical member is located in the support member installing hole, and the surrounding of the connection member lower surface upper supporting piece installing hole is opened up There are at least two location holes, on the stirring-head upper surface, be provided with many locating dowels corresponding with location hole, the locating dowel is stretched Enter in location hole so that connection member and stirring-head energy synchronous axial system.
As preferred:The locating dowel upper end is taper, and the location hole edge has chamfering.
As preferred:The connection member lower end and stirring-head upper end are provided with the claw being engaged, the resilient support Part is spring, rubber, the one kind in polyurethane.
As preferred:The position limiting structure includes check lock lever, the locking hole being located in connection member and is located at stirring-head On bar shaped spacing hole, the check lock lever limits stirring-head through locking hole and bar shaped spacing hole and deviates from from connection member, institute State stirring-head and moving up and down relative to connection member is realized by bar shaped spacing hole.
As preferred:The machine body includes base, spindle bearing, in front and back left and right propulsive mechanism, propulsive mechanism and work Make platform, on base, the propulsive mechanism in front and back is by the first slide mechanism installed in left and right for the left and right propulsive mechanism On propulsive mechanism, the workbench is by the second slide mechanism on propulsive mechanism in front and back;Along perpendicular on the spindle bearing Nogata is slidably fitted with the first support base to the first guide rail and upper and lower propulsive mechanism is provided with the first guide rail, first support Seat be connected with upper and lower propulsive mechanism, is provided with electric rotating machine on first support base, the main shaft and electric rotating machine outfan It is connected, the stirring-head is located above workbench.
Said structure, main shaft drives part only need to rotation and move in vertical direction, and pass through the left in front and back of workbench Move right the adjustment of realizing welding position, so that the lightweight of machine spindle part, device integrally realizes miniaturization.
As preferred:Before and after described, propulsive mechanism and left and right propulsive mechanism include motor and feed screw nut pair, screw mandrel water Flat setting is simultaneously connected with motor, and first slide mechanism and the second slide mechanism include slide rail and the slide being engaged, cunning Rail is arranged in parallel with leading screw, and slide is connected with leading screw by nut.
As preferred:The upper and lower propulsive mechanism is cylinder or hydraulic cylinder, the workbench include rigid supporting table with And the hold-down mechanism being arranged in supporting table, multiple installing holes are offered on the supporting bable tops, the hold-down mechanism is arranged on In installing hole.
As preferred:The stirring-head includes the shaft shoulder, mixing needle and the stirring-head main body for being connected with connection member, The mixing needle is conical or cylindrical, the irregular lines of genesis analysis on its side face, and the mixing needle bottom surface is plane Or curved surface.
As preferred:The mixing needle bottom surface be arranged in parallel and is provided with a plurality of lines, or arranged in a crossed manner has a plurality of lines.
As described above, the invention has the beneficial effects as follows:Compared with friction welding is stirred using conventional rigid mixing needle, On the one hand floating support structure, can cause pressure energy to keep constant, improve quality of weld joint during welding;On the other hand, occur During the fortuitous events such as disturbance, floating support structure can mitigate torsion or the impulsive force that stirring-head bears, and easily protect stirring-head, make Its not easy fracture, extends stirring-head service life.Using left and right propulsive mechanism, in front and back by the way of propulsive mechanism, by mobile work Change welding position as platform, simplify main axle structure, make device entirety lightweight, miniaturization, material-saving and cost, promote to stir Mix all-round popularization and the large-scale application of friction welding technology.
Description of the drawings
Fig. 1 is the structural representation of the present invention;
Fig. 2 is the plan view of workbench portion of the present invention;
Fig. 3 is the mounting structure schematic diagram on spindle bearing of the present invention;
Fig. 4 is the annexation schematic diagram of connection member of the present invention and stirring-head;
Sectional views of the Fig. 5 for Fig. 4 other directions;
Fig. 6 is the upward view of connection member in the present invention;
Fig. 7 is the top view of stirring-head in the present invention;
Fig. 8 is the structural representation of stirring-head in the present invention;
Fig. 9 is the upward view of mixing needle one of which structure in the present invention.
Piece mark explanation
1 base
2 spindle bearings
About 3 propulsive mechanisms
31 hydraulic cylinders
32 first guide rails
33 first support bases
4 stirring-heads
41 stirring-head main bodys
42 shaft shoulders
43 mixing needles
44 connection members
45 support member installing holes
46 location holes
47 locating dowels
48 bar shaped spacing holes
49 check lock levers
5 or so propulsive mechanisms
51 first motors
52 first screw mandrels
53 first slide rails
54 first slides
Propulsive mechanism before and after 6
61 second motors
62 second screw mandrels
63 second slide rails
64 first mounting seats
65 second slides
7 workbench
71 installing holes
81 electric rotating machines
82 first gripper shoes
83 shaft couplings
84 second gripper shoes
85 main shafts
9 photoelectric limit switch devices
10 springs
Specific embodiment
The embodiment that invents is described by particular specific embodiment below, those skilled in the art can be by this specification Disclosed content understands other advantages and effect of invention easily.
As shown in Figure 1 to Figure 3, the present invention provides a kind of agitating friction soldering equipment, including the lathe for agitating friction weldering Body, is provided with stirring-head on the main shaft of machine body, is provided with floating support structure between stirring-head and main shaft, floats Supporting construction includes that connection member 44 and elastic supporting member for supporting optical member, connection member 44 are fixed with main shaft, 44 bottom of connection member and stirring Head top is coordinated by multiple recesses and convex portion, and energy synchronous axial system, and elastic supporting member for supporting optical member withstands on 44 lower end of connection member and stirring Between head upper end, and the position limiting structure for preventing stirring-head from deviating from connection member 44, is provided with from 44 lower end of connection member, described Stirring-head includes the shaft shoulder, mixing needle and the stirring-head main body for being connected with connection member 44, and in this example, machine body includes Base 1, spindle bearing 2, in front and back left and right propulsive mechanism 5, propulsive mechanism 6 and workbench 7, left and right propulsive mechanism 5 are arranged on base 1 On, by the first slide mechanism on left and right propulsive mechanism 5, workbench 7 passes through the second slide mechanism to propulsive mechanism 6 in front and back On propulsive mechanism 6 in front and back;First guide rail 32 and upper and lower propulsive mechanism 3 are vertically provided with spindle bearing 2, the The first support base 33 is slidably fitted with one guide rail 32, and first support base 33 is connected with upper and lower propulsive mechanism 3, the first support base Electric rotating machine 81 and main shaft 85 is provided with 33, and electric rotating machine 81 and main shaft 85 are supported by the first gripper shoe 82 and second respectively On the first support base 33, electric rotating machine 81 is connected by shaft coupling 83 plate 84 with main shaft 85, and main shaft 85 and second is supported Bearing is provided between plate 84.Stirring-head 4 is located above workbench 7.
Further as shown in Figures 4 to 7:
In this example, connection member 44 is cylindric, and 44 lower surface center of connection member offers support member installing hole 45, bullet Property support member be located at the support member installing hole 45 in, stirring-head main body upper end is provided with the boss of positioning elastic support member, connection The surrounding of 44 lower surface upper supporting piece installing hole 45 of part offers 2-4 location hole 46, arranges on stirring-head main body upper surface Have many with 46 corresponding locating dowel 47 of location hole, the locating dowel 47 stretched in location hole 46 so that connection member 44 and stirring Head can synchronous axial system.For the ease of being oriented to during connection, 47 upper end of locating dowel is taper, and 46 edge of location hole has chamfering.
Certainly, in other embodiment, 44 lower end of connection member and stirring-head main body upper end can be entered by the claw being engaged Row transmission, similar to the claw structure of shaft coupling.In this example, elastic supporting member for supporting optical member is spring 10.Can also be to bear larger lotus Other elastic constructions for carrying.
Position limiting structure includes check lock lever 49, the locking hole being located in connection member 44 and the bar being located in stirring-head main body Shape spacing hole 48, check lock lever 49 limit stirring-head through locking hole and bar shaped spacing hole 48 and deviate from from connection member 44, stir Head realizes moving up and down relative to connection member 44 by bar shaped spacing hole 48.Length of the bar shaped spacing hole 48 in vertical direction Spring to be ensured 10 when compressing completely, projection upper end and 45 bottom non-contravention of support member installing hole.
Further as shown in Fig. 2 left and right propulsive mechanism 5 includes the first motor 51 and the first feed screw nut pair, the first motor 51 by 51 mounting seat of the first motor on the base 1, the first screw mandrel 52 is horizontally set on base 1, and with the first motor 51 are connected, and the first slide mechanism is made up of first slide 54 and the first slide rail 53, and the first slide rail 53 and the first screw mandrel 52 are abreast It is arranged on base 1, first slide 54 is erected on the first slide rail 53, first slide 54 and 52 screw thread of the first leading screw coordinate.Before In the first mounting seat 64, the first mounting seat 64 is fixed in first slide 54 propulsive mechanism 6, in front and back propulsive mechanism 6 afterwards Including the second motor 61 and the second feed screw nut pair, the second motor 61 is arranged on the first mounting seat 64 by the second motor mount On, the second screw mandrel 62 is horizontally set in the first mounting seat 64, and is connected with the second motor 61, and the second slide mechanism is slided by second Seat 65 and the second slide rail 63 are constituted, and the second slide rail 63 and the second screw mandrel 62 are abreast arranged in the first mounting seat 64, and second slides Seat 65 is erected on the second slide rail 63, and second slide 65 and 62 screw thread of the second leading screw coordinate, and workbench 7 is arranged on second slide 65 On.
In this example, upper and lower propulsive mechanism 3 includes hydraulic cylinder 31 and is connected to the drive rod of 31 lower end of hydraulic cylinder, drive rod It is connected with the first support base 33, can also is that cylinder or motor are combined with screw mandrel in other embodiment.Workbench 7 includes just Property supporting table and the hold-down mechanism being arranged in supporting table, hold-down mechanism can be combination etc. of one pressing plate of bolt, support Multiple threaded mounting holes 71 are offered on table top, and hold-down mechanism is in installing hole 71.Before welding, welded piece is placed in just In property supporting table, and which is clamped with hold down gag, to realize rigidly fixing for welded piece.Arrange on workbench 7 many Individual equally distributed screwed hole, is easy to fix welded piece from suitable mode with position.
Photoelectric limit switch device 9 is provided with first slide rail 53, the second slide rail 63 and the first guide rail 32;Photoelectricity Limit switch device 9 installs slide unit by limit switch and photoelectric limit switch is constituted, and photoelectric limit switch device 9 is arranged on first The either side of slide rail 53, the second slide rail 63 and the first guide rail 32;When slide block beyond spacing when, photoswitch emitter and receptor Between light path be cut off, send the signal that transfinites, so as to ensure agitating friction welder reliably working.Electric rotating in this example Machine 81, the first motor 51, the second motor 61 using servomotor, are easy to control, high precision, also include certainly control system Deng being connected with each servomotor and be controlled.The planer type structure that machine body can also be conventional in other embodiment, that is, lead Axle does Z, Y-direction motion, and workbench is X to motion.
As shown in Fig. 5, Fig. 8, Fig. 9, mixing needle is conical or cylindrical, the irregular stricture of vagina of genesis analysis on its side face Road, the mixing needle bottom surface is plane or curved surface, and mixing needle bottom surface be arranged in parallel and is provided with a plurality of lines, or arranged in a crossed manner have many Bar lines, lines therein are made up of groove or raised line, to increase the frictional force of mixing needle.
On the one hand the floating support structure of the present invention, can cause pressure energy to keep constant, improve welding point matter during welding Amount;On the other hand, when there are the fortuitous events such as disturbance, floating support structure can mitigate torsion or the impulsive force that stirring-head bears, Easy protection stirring-head so as to not easy fracture, extends stirring-head service life.Main shaft drives part only needs to rotation and vertical Direction is moved, and by the adjustment that all around moves to realize welding position of workbench, so that machine spindle part Structure is simpler, lightweight, and device integrally realizes miniaturization.
Any person skilled in the art all can be repaiied to above-described embodiment under the spirit and the scope without prejudice to invention Decorations change.Therefore, such as those of ordinary skill in the art without departing from the disclosed spirit of invention and technology All equivalent modifications completed under thought or change, should be covered by the claim that invents.

Claims (10)

1. a kind of agitating friction soldering equipment, including the machine body for agitating friction weldering, installs on the main shaft of machine body There is stirring-head, it is characterised in that:Floating support structure is provided between the stirring-head and main shaft, the floating support structure Including connection member and elastic supporting member for supporting optical member, the connection member is fixed with main shaft, the connection member bottom and stirring-head top Coordinated by multiple recesses and convex portion, and can synchronous axial system, the elastic supporting member for supporting optical member withstood on connection member lower end and stirring-head Between end, and the position limiting structure for preventing stirring-head from deviating from the connection member, is provided with from connection member lower end.
2. a kind of agitating friction soldering equipment according to claim 1, it is characterised in that:The connection member be column, institute State connection member lower surface center and offer support member installing hole, the elastic supporting member for supporting optical member is located in the support member installing hole, institute The surrounding for stating connection member lower surface upper supporting piece installing hole offers at least two location holes, sets on the stirring-head upper surface Many locating dowels corresponding with location hole are equipped with, the locating dowel is stretched in location hole so that connection member and stirring-head can be synchronous Rotate.
3. a kind of agitating friction soldering equipment according to claim 2, it is characterised in that:The locating dowel upper end is taper, The location hole edge has chamfering.
4. a kind of agitating friction soldering equipment according to claim 1, it is characterised in that:The connection member lower end and stirring Head upper end is provided with the claw being engaged, and the elastic supporting member for supporting optical member is spring.
5. a kind of agitating friction soldering equipment according to claim 1, it is characterised in that:The position limiting structure includes locking Bar, the locking hole being located in connection member and the bar shaped spacing hole being located on stirring-head, the check lock lever through locking hole and Bar shaped spacing hole limits stirring-head and deviates from from connection member, and the stirring-head is realized relative to connecting portion by bar shaped spacing hole Part is moved up and down.
6. a kind of agitating friction soldering equipment according to claim 1, it is characterised in that:The machine body include base, Spindle bearing, in front and back left and right propulsive mechanism, propulsive mechanism and workbench, the left and right propulsive mechanism are on base, described Propulsive mechanism by the first slide mechanism on the propulsive mechanism of left and right, pacified by the second slide mechanism by the workbench in front and back It is mounted on before and after's propulsive mechanism;First guide rail and upper and lower propulsive mechanism be vertically provided with the spindle bearing, first The first support base is slidably fitted with guide rail, first support base is connected with upper and lower propulsive mechanism, set on first support base Electric rotating machine is equipped with, the main shaft is connected with electric rotating machine outfan, the stirring-head is located above workbench.
7. a kind of agitating friction soldering equipment according to claim 6, it is characterised in that:Propulsive mechanism and left and right before and after described Propulsive mechanism includes motor and feed screw nut pair, and screw mandrel is horizontally disposed and is connected with motor, first slide mechanism and the Two slide mechanisms include that slide rail and the slide being engaged, slide rail are arranged in parallel with leading screw, and slide is connected with leading screw by nut.
8. a kind of agitating friction soldering equipment according to claim 6, it is characterised in that:The upper and lower propulsive mechanism is cylinder Or hydraulic cylinder, the workbench includes rigid supporting table and the hold-down mechanism being arranged in supporting table, the supporting bable tops On offer multiple installing holes, the hold-down mechanism is in installing hole.
9. a kind of agitating friction soldering equipment according to claim 1, it is characterised in that:The stirring-head includes the shaft shoulder, stirs Pin and the stirring-head main body for being connected is mixed with connection member, and the mixing needle is conical or cylindrical, indulges on its side face To irregular lines is distributed, the mixing needle bottom surface is plane or curved surface.
10. a kind of agitating friction soldering equipment according to claim 9, it is characterised in that:The mixing needle bottom surface is parallel to be set A plurality of lines is equipped with, or arranged in a crossed manner has a plurality of lines.
CN201510375127.6A 2015-06-23 2015-06-23 Friction-stir welding equipment CN104985320B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510375127.6A CN104985320B (en) 2015-06-23 2015-06-23 Friction-stir welding equipment

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Application Number Priority Date Filing Date Title
CN201510375127.6A CN104985320B (en) 2015-06-23 2015-06-23 Friction-stir welding equipment

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CN104985320B true CN104985320B (en) 2017-02-22

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CN106238899A (en) * 2016-08-06 2016-12-21 姜海 Steel pipe agitating friction soldering set based on pressure feedback and welding method
CN106271024A (en) * 2016-08-06 2017-01-04 姜海 Steel pipe agitating friction soldering set based on pressure feedback and welding method
CN106141418A (en) * 2016-08-06 2016-11-23 姜海 The flexible steel pipe agitating friction soldering set started and welding method
CN106141417A (en) * 2016-08-06 2016-11-23 姜海 Steel pipe agitating friction soldering set and welding method
CN106181019A (en) * 2016-08-06 2016-12-07 姜海 The flexible steel pipe agitating friction soldering set started based on pressure feedback and welding method
CN106238900A (en) * 2016-08-06 2016-12-21 姜海 The flexible agitating friction soldering set started and welding method
CN106141419A (en) * 2016-08-06 2016-11-23 姜海 Agitating friction soldering set and welding method
CN106141420A (en) * 2016-08-06 2016-11-23 姜海 Agitating friction soldering set based on pressure feedback and welding method
CN107175401B (en) * 2017-05-17 2019-09-20 北京世佳博科技发展有限公司 Improve the flexible friction stir welding tool and welding method of production efficiency
CN108971744A (en) * 2018-10-16 2018-12-11 江苏科技大学 A kind of adaptive friction stir welding method of noise-reduction type axial compressive force and device
CN110193657A (en) * 2019-05-06 2019-09-03 上海发那科机器人有限公司 A kind of two-freedom friction welding (FW) mainshaft mechanism suitable for industrial robot
CN110434452A (en) * 2019-07-17 2019-11-12 南京中车浦镇城轨车辆有限责任公司 A kind of adaptive stirring tool and welding method of the welding of multilayer hollow profile

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Effective date of registration: 20170113

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Address before: The road of Songshan Lake Science and Technology Industrial Park in Guangdong city of Dongguan Province, No. 2 523808

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Effective date of registration: 20170113

Address after: Shiqiaopu stone Jiulongpo 400039 Yang Chongqing City Road 17, 77-1 and 77-4 wan chang international business incubator on the third floor of city electrical B108

Applicant after: Chongqing send special mechanical and Electrical Co., Ltd.

Address before: The road of Songshan Lake Science and Technology Industrial Park in Guangdong city of Dongguan Province, No. 2 523808

Applicant before: Tang Yuanjin

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Address after: No.2-3, building 6, No.39 Xinggu Road, Jiulongpo District, Chongqing

Patentee after: CHONGQING POTENT ELECTRICAL AND MECHANICAL Co.,Ltd.

Address before: Shiqiaopu stone Jiulongpo 400039 Yang Chongqing City Road 17, 77-1 and 77-4 wan chang international business incubator on the third floor of city electrical B108

Patentee before: CHONGQING POTENT ELECTRICAL AND MECHANICAL Co.,Ltd.