WO2007074974A1 - Apparatus for friction stir spot welding - Google Patents

Apparatus for friction stir spot welding Download PDF

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Publication number
WO2007074974A1
WO2007074974A1 PCT/KR2006/004968 KR2006004968W WO2007074974A1 WO 2007074974 A1 WO2007074974 A1 WO 2007074974A1 KR 2006004968 W KR2006004968 W KR 2006004968W WO 2007074974 A1 WO2007074974 A1 WO 2007074974A1
Authority
WO
WIPO (PCT)
Prior art keywords
friction stir
spot welding
stir spot
welding device
rotation shaft
Prior art date
Application number
PCT/KR2006/004968
Other languages
French (fr)
Inventor
Woong-Seong Chang
Young-Gak Kwon
Chang-Kun Chun
Tae-Sung Roh
Original Assignee
Research Institute Of Industrial Science & Technology
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 Research Institute Of Industrial Science & Technology filed Critical Research Institute Of Industrial Science & Technology
Priority to DE112006003552T priority Critical patent/DE112006003552B4/en
Priority to JP2008548374A priority patent/JP4940246B2/en
Publication of WO2007074974A1 publication Critical patent/WO2007074974A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
    • 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
    • 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
    • B23K20/12—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
    • B23K20/1265—Non-butt welded joints, e.g. overlap-joints, T-joints or spot welds

Definitions

  • Lightweight alloy using a lightweight material such as aluminum or magnesium has been widely used in various industrial fields such as civil engineering and construction field and in transportations such as automobiles or airplanes.
  • various industrial fields such as civil engineering and construction field and in transportations such as automobiles or airplanes.
  • the lightweight alloys have to be connected by welding. Accordingly, a technique of welding the lightweight alloy has been widely researched.
  • friction stir welding is disclosed in International Patent Publication document (International Patent No. WO93/10935; applicant: THE WELDING INSTITUTE).
  • the friction stir welding technique will be briefly described with reference to the aforementioned document.
  • two to-be- processed objects are in contact with each other and connected by using friction heat generated while a tool proceeds along the interface between the two objects and using a plastic work phenomenon generated in the objects.
  • the aforementioned friction stir spot welding method is obtained by combining a resistance spot welding method with a friction stir welding method and recognized as another welding method that is different from the friction stir welding.
  • a friction stir spot welding device in which a driver for rotating a main shaft on which a rotation tool is installed in a fixed frame, and the driving shaft of the driver is connected to the spindle of the main shaft through a timing belt or chain, in Japanese Unexamined Patent Application Publication No. 2002-137067 (hereinafter, referred to as 'Kawasaki patent').
  • driving force of the driver is transmitted to the spindle of the main shaft through the timing belt or chain, and accordingly, the main shaft is rotated.
  • the load of the welding device can be reduced as compared with the existing friction stir spot welding device.
  • the load of the friction stir spot welding device can be reduced.
  • the frame 10 has a hollow box shape.
  • first to third plates 12, 14 and 16 are included.
  • the housing 22 protrudes through a lower wall 18 of the frame 10.
  • a rotation tool 24 that is rotated together with the rotation shaft spindle 20 protrudes through the housing 22.
  • the rotation tool 24 allows to-be-processed objects to be connected to each other by applying a predetermined force on a surface of the objects (not shown) while the rotation tool 24 is rotating.
  • the housing 22 does not rotate with the rotation shaft spindle 20 but maintains a fixed state.
  • the power of the rotation shaft driver 30 is transmitted to the rotation shaft spindle 20 through the timing belt or chain 34. Accordingly, the rotation tool 24 is rotated together with the rotation shaft spindle 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Abstract

A friction stir spot welding device capable of connecting to-be-processed objects using friction heat between the overlapped objects and a rotation tool is provided. In the friction stir spot welding device, a driver for driving the rotation tool is not installed on the same shaft as the rotation tool, and a driving force for moving the rotation tool in a vertical direction is transmitted through a feed screw and feed nuts engaged therewith. Accordingly, it is possible to reduce the load of the friction stir spot welding device and accurately control the height of the rotation tool.

Description

APPARATUS FOR FRICTION STIR SPOT WELDING
TECHNICAL FIELD
The present invention relates to a friction stir spot welding device, and more particularly, to a friction stir spot welding for connecting overlapped to-be-processed objects by using friction heat between the objects and a rotation tool.
BACKGROUNDART
Lightweight alloy using a lightweight material such as aluminum or magnesium has been widely used in various industrial fields such as civil engineering and construction field and in transportations such as automobiles or airplanes. In order to produce/manufacture various instruments and structures by using the lightweight alloy, in many cases, the lightweight alloys have to be connected by welding. Accordingly, a technique of welding the lightweight alloy has been widely researched. Recently, friction stir welding (FSW) is disclosed in International Patent Publication document (International Patent No. WO93/10935; applicant: THE WELDING INSTITUTE).
The friction stir welding technique will be briefly described with reference to the aforementioned document. In the friction stir welding technique, two to-be- processed objects are in contact with each other and connected by using friction heat generated while a tool proceeds along the interface between the two objects and using a plastic work phenomenon generated in the objects.
Recently, efforts are increased by using/improving the friction stir welding technique.
For example, a friction stir spot welding method is widely known as another welding method derived from the friction stir welding method.
In the friction stir spot welding method, the objects is welded by stirring the object at a spot by moving the rotation tool toward the object by using a part of the friction stir spot welding phenomenon with respect to an overlapped junction.
The aforementioned friction stir spot welding method is obtained by combining a resistance spot welding method with a friction stir welding method and recognized as another welding method that is different from the friction stir welding.
In the past, there is disclosed a friction stir spot welding device constructed so that a driver for rotating the rotation tool, for example, a motor is installed on the same shaft as the rotation tool and moved together with the rotation tool in a vertical direction, as a welding device for performing the friction stir spot welding method.
However, it is disadvantageous that a load of the aforementioned friction stir spot welding device is heavy.
In order to solve the aforementioned problem, there is disclosed a friction stir spot welding device in which a driver for rotating a main shaft on which a rotation tool is installed in a fixed frame, and the driving shaft of the driver is connected to the spindle of the main shaft through a timing belt or chain, in Japanese Unexamined Patent Application Publication No. 2002-137067 (hereinafter, referred to as 'Kawasaki patent'). In the aforementioned welding device, driving force of the driver is transmitted to the spindle of the main shaft through the timing belt or chain, and accordingly, the main shaft is rotated. Thus, the load of the welding device can be reduced as compared with the existing friction stir spot welding device.
However, in the friction stir spot welding device of the Kawasaki patent, the timing belt or chain is used so as to move the main shaft in the vertical direction.
Accordingly, when the friction stir spot welding device of the Kawasaki patent has been used for a long time, the main shaft is deformed due to a side load caused by the timing belt or chain, or a gap of the timing belt or chain is generated. Therefore, it is impossible to accurately control the height of the main shaft.
DETAILED DESCRIPTION OF THE INVENTION
Technical Goal of the Invention
The present invention provides a friction stir spot welding device capable of reducing the load of the friction stir spot welding device and accurately controlling the height of the main shaft on which a rotation tool is installed.
Technical solution
According to an aspect of the present invention, there is provided a friction stir spot welding device comprising: a frame; a housing which includes upper and lower feed nuts, the housing being installed in the frame so as to be movable in a vertical direction; a rotation shaft spindle which is installed in the housing that includes a rotation tool for friction stir spot welding; a rotation shaft driver which supplies a driving force for rotating the rotation shaft spindle, the rotation shaft driver being fixed to the frame; a power transmission member which transmits the driving force of the rotation shaft driver to the rotation shaft spindle; a feed screw which is engaged with the upper and lower feed nuts of the housing; and a feed screw driver which rotates the feed screws, the feed screw driver being fixed to a location adjacent to the rotation shaft spindle in the frame.
In the above aspect of the present invention, the frame may include first to third plates. In this case, the rotation shaft spindle may be installed through the first plate, and the housing may be installed through the second and third plates.
In addition, a feed screw driver may be installed on the first plate at location adjacent to the rotation shaft spindle, the feed screw that is driven through direct coupling with the feed screw driver may be installed through the first plate, the upper and lower feed nuts, the second and third plates. In addition, the rotation shaft driver may be installed on the first plate at location adjacent to the feed screw driver.
In addition, the frame may include a supporting member on which to-be- processed objects are disposed.
In addition, the power transmission member may include a timing belt or chain.
Advantageous effects
As described above, according to an aspect of the present invention, since a driver for rotating a rotation tool, for example, a motor is not installed on the same shaft as the rotation tool, the load of the friction stir spot welding device can be reduced.
In addition, since a driving force of the driver for moving the rotation tool in a vertical direction is transmitted through feed screws and feed nuts engaged therewith, it is possible to solve the problem that the rotation shaft spindle is deformed. It is possible to accurately control the height of the rotation tool.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic view illustrating a friction stir spot welding device according to an embodiment of the present invention.
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present will be described in detail with reference to accompanying drawings.
FIG. 1 is a schematic view illustrating a friction stir spot welding device according to an embodiment of the present invention.
The friction stir spot welding device according to the embodiment includes a frame 10.
The frame 10 has a hollow box shape. In the frame 10, first to third plates 12, 14 and 16 are included.
A rotation shaft spindle 20 is installed through the first plate 12 in a vertical direction. A housing 22 which surrounds the rotation shaft spindle 20 is installed through the second and third plates 14 and 16 in the vertical direction.
The housing 22 protrudes through a lower wall 18 of the frame 10. A rotation tool 24 that is rotated together with the rotation shaft spindle 20 protrudes through the housing 22. The rotation tool 24 allows to-be-processed objects to be connected to each other by applying a predetermined force on a surface of the objects (not shown) while the rotation tool 24 is rotating.
A rotation shaft driver 30 is fixed to a location on the first plate 12 which is spaced apart from the rotation shaft spindle 20 by a predetermined distance. A driving shaft 32 of the rotation shaft driver 30 is connected to the rotation shaft spindle 20 by using a power transmission member such as a timing belt or chain 34.
Accordingly, when the rotation shaft driver 30 is driven, and the driving shaft 32 is rotated, the rotational force is transmitted to the rotation shaft spindle 20 through the timing belt or chain 34, and the spindle 20 is rotated. Accordingly, the rotation tool 24 is rotated.
Then, the housing 22 does not rotate with the rotation shaft spindle 20 but maintains a fixed state.
A feed screw driver 40 is fixed between the rotation shaft spindle 20 and the rotation shaft driver 30 on the first plate 12. A feed screw 42 that is driven through a direct coupling is installed on the feed screw driver 40.
At this time, the feed screw 42 is installed through the first to third plates 12, 14, and 16 and upper and lower feed nuts 26 in the housing 22.
Accordingly, when the feed screw driver 40 is driven, and accordingly, the feed screw 42 is rotated, since the upper and lower feed nuts 26 moves in a vertical direction, the housing 22 and the rotation shaft spindle 20 moves in the vertical direction.
A supporting member 50 on which the object (not shown) is installed on a side wall of the frame 10. An end portion of the supporting member 50 is disposed to face the rotation tool 24. Hereinafter, a welding method using the aforementioned friction stir spot welding device will be described. The object (not shown) is located on the supporting member 50. The rotation shaft driver 30 is driven.
Then, the power of the rotation shaft driver 30 is transmitted to the rotation shaft spindle 20 through the timing belt or chain 34. Accordingly, the rotation tool 24 is rotated together with the rotation shaft spindle 20.
When the feed screw driver 40 is driven while the rotation tool 24 is rotating, the housing 22 and the rotation shaft spindle 20 moves in a downward direction by operations of the feed screw 42 and the upper and lower feed nuts 26 engaged therewith. Accordingly, the rotation tool 24 is closely in contact with the object (not shown), and the rotation tool 24 is rotated in a state in which the rotation tool 24 is closely in contact with the object. Accordingly, since friction heat is generated between the rotation tool 24 and the object, the object is softened, and the surface of the object is stirred.

Claims

1. A friction stir spot welding device comprising: a frame; a housing which includes upper and lower feed nuts, the housing being installed in the frame so as to be movable in a vertical direction; a rotation shaft spindle which is installed in the housing that includes a rotation tool for friction stir spot welding; a rotation shaft driver which supplies a driving force for rotating the rotation shaft spindle, the rotation shaft driver being fixed to the frame; a power transmission member which transmits the driving force of the rotation shaft driver to the rotation shaft spindle; a feed screw which is engaged with the upper and lower feed nuts of the housing; and a feed screw driver which rotates the feed screws, the feed screw driver being fixed to a location adjacent to the rotation shaft spindle in the frame.
2. The friction stir spot welding device as claimed in claim 1 , wherein the frame includes first to third plates.
3. The friction stir spot welding device as claimed in claim 2, wherein the rotation shaft spindle is installed through the first plate, and the housing is installed through the second and third plates.
4. The friction stir spot welding device as claimed in claim 3, wherein the feed screw driver is installed on the first plate at location adjacent to the rotation shaft spindle, the feed screw that is driven through direct coupling with the feed screw driver is installed through the first plate, the upper and lower feed nuts, the second and third plates.
5. The friction stir spot welding device as claimed in claim 4, wherein the rotation shaft driver is installed on the first plate at location adjacent to the feed screw driver.
6. The friction stir spot welding device as claimed in claim 1 , wherein the frame includes a supporting member on which to-be-processed objects are disposed.
7. The friction stir spot welding device as claimed in claim 6, wherein the frame includes first to third plates.
8. The friction stir spot welding device as claimed in claim 7, wherein the rotation shaft spindle is installed through the first plate, and the housing is installed through the second and third plates.
9. The friction stir spot welding device as claimed in claim 8, wherein the feed screw driver is installed on the first plate at location adjacent to the rotation shaft spindle, the feed screw that is driven through direct coupling with the feed screw driver is installed through the first plate, the upper and lower feed nuts, the second and third plates.
10. The friction stir spot welding device as claimed in claim 9, wherein the rotation shaft driver is installed on the first plate at location adjacent to the feed screw driver.
11. The friction stir spot welding device as claimed in claim 1 , wherein the power transmission member includes a timing belt or chain.
12. The friction stir spot welding device as claimed in claim 11 , wherein the frame includes first to third plates.
13. The friction stir spot welding device as claimed in claim 12, wherein the rotation shaft spindle is installed through the first plate, and the housing is installed through the second and third plates.
14. The friction stir spot welding device as claimed in claim 13, wherein the feed screw driver is installed on the first plate at location adjacent to the rotation shaft spindle, the feed screw that is driven through direct coupling with the feed screw driver is installed through the first plate, the upper and lower feed nuts, the second and third plates.
15. The friction stir spot welding device as claimed in claim 14, wherein the rotation shaft driver is installed on the first plate at location adjacent to the feed screw driver.
16. The friction stir spot welding device as claimed in claim 1 , wherein the frame includes a supporting member on which to-be-processed objects are disposed, and the power transmission member includes a timing belt or chain.
17. The friction stir spot welding device as claimed in claim 16, wherein the frame includes first to third plates.
18. The friction stir spot welding device as claimed in claim 17, wherein the rotation shaft spindle is installed through the first plate, and the housing is installed through the second and third plates.
19. The friction stir spot welding device as claimed in claim 18, wherein the feed screw driver is installed on the first plate at location adjacent to the rotation shaft spindle, the feed screw that is driven through direct coupling with the feed screw driver is installed through the first plate, the upper and lower feed nuts, the second and third plates.
20. The friction stir spot welding device of claim 19, wherein the rotation shaft driver is installed on the first plate at location adjacent to the feed screw driver.
PCT/KR2006/004968 2005-12-26 2006-11-24 Apparatus for friction stir spot welding WO2007074974A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE112006003552T DE112006003552B4 (en) 2005-12-26 2006-11-24 friction stir spot welding
JP2008548374A JP4940246B2 (en) 2005-12-26 2006-11-24 Friction stir spot welding equipment

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2005-0129290 2005-12-26
KR1020050129290A KR100711778B1 (en) 2005-12-26 2005-12-26 Apparatus for friction stir spot welding

Publications (1)

Publication Number Publication Date
WO2007074974A1 true WO2007074974A1 (en) 2007-07-05

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PCT/KR2006/004968 WO2007074974A1 (en) 2005-12-26 2006-11-24 Apparatus for friction stir spot welding

Country Status (5)

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JP (1) JP4940246B2 (en)
KR (1) KR100711778B1 (en)
CN (1) CN101389438A (en)
DE (1) DE112006003552B4 (en)
WO (1) WO2007074974A1 (en)

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Publication number Priority date Publication date Assignee Title
KR101277453B1 (en) 2012-04-25 2013-06-27 주식회사동양강철 Apparatus for welding large size alluminium alloy structures
DE102016205924A1 (en) 2016-04-08 2017-10-12 Ford Global Technologies, Llc Method for producing a hybrid connection and device therefor
CN111347151A (en) * 2020-03-12 2020-06-30 天津大学 High-rigidity three-degree-of-freedom parallel machine head for friction stir welding
CN111347150A (en) * 2020-03-12 2020-06-30 天津大学 Two-rotation and one-translation parallel machine head for friction stir welding

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Also Published As

Publication number Publication date
DE112006003552T5 (en) 2009-01-02
KR100711778B1 (en) 2007-04-25
JP2009521331A (en) 2009-06-04
DE112006003552B4 (en) 2011-02-17
CN101389438A (en) 2009-03-18
JP4940246B2 (en) 2012-05-30

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