WO2005108002A1 - High energy density beam welding system using molten metal droplet jetting - Google Patents
High energy density beam welding system using molten metal droplet jetting Download PDFInfo
- Publication number
- WO2005108002A1 WO2005108002A1 PCT/KR2005/001401 KR2005001401W WO2005108002A1 WO 2005108002 A1 WO2005108002 A1 WO 2005108002A1 KR 2005001401 W KR2005001401 W KR 2005001401W WO 2005108002 A1 WO2005108002 A1 WO 2005108002A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- molten metal
- energy density
- high energy
- parent metal
- electrode
- Prior art date
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 78
- 239000002184 metal Substances 0.000 title claims abstract description 78
- 238000003466 welding Methods 0.000 title claims abstract description 78
- 239000007921 spray Substances 0.000 claims abstract description 9
- 238000012546 transfer Methods 0.000 claims abstract description 4
- 238000002844 melting Methods 0.000 claims description 11
- 230000008018 melting Effects 0.000 claims description 11
- 238000005507 spraying Methods 0.000 claims description 4
- 230000002708 enhancing effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 239000000155 melt Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 2
- 238000012806 monitoring device Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000013077 target material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
- B23K26/1462—Nozzles; Features related to nozzles
- B23K26/1464—Supply to, or discharge from, nozzles of media, e.g. gas, powder, wire
- B23K26/147—Features outside the nozzle for feeding the fluid stream towards the workpiece
-
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
- B23K26/146—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor the fluid stream containing a liquid
-
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/211—Bonding by welding with interposition of special material to facilitate connection of the parts
-
- 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
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D15/00—Movable or portable bridges; Floating bridges
- E01D15/12—Portable or sectional bridges
Definitions
- the present invention relates to a high energy density beam welding system using molten metal droplet jetting; and, more particularly, to a high energy density beam welding system capable of, while a high energy density beam melts a portion to be welded on a target object, transfering or spraying molten metal droplets into a gap in the portion to be welded so that a joint can be welded even when a gap therein is relatively wide, the welding efficiency can be enhanced by reducing energy loss because only the target object is heated and melted by the high energy density beam, and thermal distortions can be minimized by reducing heat input.
- Gap constraint required for a conventional butt welding using high energy density beam is as follows:
- t (mm) is the thickness of a plate as the target object
- g (mm) is the gap in a joint on the target object
- d (mm) is the focus diameter of the high energy density beam
- b (mm) is the width of a weld
- h (mm) is the height of a weld
- the good weld width is in the range of:
- Fig. 1 shows a schematic diagram depicting a conventional high energy density beam welding system using a welding wire.
- a weld is formed by melting simultaneously a front end of a welding wire 6 and a portion to be welded on a target object 9 by means of a high energy density beam 3 emitted from a beam generator 1 through a focus regulator 2.
- the focus of the high energy density beam 3 be located at the front end of the welding wire 6 provided by a wire supplier 4 and the portion to be welded on the target object 9 with a discrepancy of 1 mm or less.
- shielding gas purges onto the portion to be welded on the target object 9 from a shielding gas nozzle 8 connected to a shielding gas supplier 7 to prevent the portion to be welded from oxidation and impurities.
- Reference numeral 5 designates a wire guide for guiding the welding wire 6 provided by the wire supplier 4 such that it can be accurately delivered to the portion to be welded.
- the welding wire supplier needs to be more complicated by reducing the vibration of the front end of the welding wire 6 and maintaining a contacted position to be touched.
- the high energy density beam 3 melts not only the target object 9 but also the welding wire 6, an energy loss in the high energy density beam is so high to significantly lower the process speed and the efficiency of the welding.
- these methods require an additional device which needs to be integrated to the welding wire supplier, which is not efficient and constrained in the operations.
- the present invention has been developed to solve the above problems; it is the object of the present invention to provide a high energy density beam welding system capable of welding a joint even where a gap is relatively wide, by melting a portion to be welded on the target object by means of the high energy density beam while molten metal droplets are transferred or sprayed by a molten metal droplet jetting device and, in addition, minimizing the loss of high energy density beam and the additional heat input in the welded zone.
- a high energy density beam welding system using molten metal droplet jetting which comprises a beam emitting unit for emitting a high energy density beam onto a welded portion on a target object; and a molten metal droplet jetting unit for generating molten metal droplets to transfer or spray the molten metal droplets onto the welded portion on the target object following a path of the beam emitting unit.
- a welding can be performed even where a gap is wide with a high welding efficiency thereby making it suitable for a wide range of applications and it is not required to provide, e.g., an additional device for reducing vibrations and positional errors of the front end of the welding wire when the welding wire is fed into the gap in the joint on the target object thereby enhancing the operation efficiency of the welding system and melting the target object and the welding wire simultaneously is not needed so that the loss in the high energy density beam is small, and the heat input in the portion to be welded is accordingly small to minimize the thermal distortions in the portion to be welded so that a high welding quality with an accuracy and a neatness can be achieved.
- FIG. 1 is a schematic diagram depicting a conventional high energy density beam welding system using a welding wire
- FIG. 2 is a schematic diagram representing a high energy density beam welding system using molten metal droplets in accordance with the present invention
- FIG. 3 is schematic diagram showing an embodiment of an arc gun type molten metal droplet jetting device in accordance with the present invention.
- FIG. 4 is a schematic diagram showing an embodiment of a gas nozzle gun type molten metal droplet jetting device in accordance with the present invention.
- FIG. 2 is a schematic diagram representing a high energy density beam welding system using molten metal droplet jetting in accordance with the present invention.
- the high energy density beam welding system in accordance with the present invention includes a beam emitting unit and a molten metal droplet jetting unit.
- the beam emitting unit emits a high energy density beam onto a portion to be welded on a target object 9 to melt it.
- the molten metal droplet jetting unit sprays molten metal droplets 12 onto a gap formed in between the portion to be welded on the target object 9.
- the high energy density beam 3 can be employed a continuous or pulsed Nd: YAG laser beam, CO laser beam, fiber laser beam, plasma or electron beam.
- the moment when the high energy density beam 3 is emitted may or may not be synchronous with the moment when the molten metal droplets 12 are sprayed.
- the beam emitting unit emits the high energy density beam 3 generated by a beam generator 1 onto the portion to be welded on the target object 9 through a focus regulator.
- the molten metal droplet jetting unit following the moving path of the beam emitting unit, includes a wire supplier for providing a welding wire 6, a wire guide 5, a molten metal droplet jetting device 11 for generating the molten metal droplets 12 by melting a front end of the provided welding wire 6 to spray the generated molten metal droplets 12 onto the portion to be welded on the target object 9, a direction regulator 10 for regulating, e.g., the sprayed direction of the molten metal droplets by changing the position and the direction of the molten metal droplet jetting device 11, a shielding gas supplier 7 for supplying shielding gas into the molten metal droplet jetting device 11 to prevent oxidation of the molten metal droplets 12, a shielding gas spray nozzle 8 and a monitoring device 13 for monitoring the portion to be welded on the target object 9 to send state information on a gap width and so forth to the molten metal droplet jetting device 11, thereby making it possible to regulate such factors as an generating amount and individual size
- the welding wire 6 is made of the same material as the target object 9 or a different kind of metal, depending on which material the target object 9 is made of.
- a welding wire 6 is used as a type of the parent metal of molten metal droplets, it is also possible to use a rod or powder instead of a wire.
- FIG. 3 illustrates a schematic diagram showing an embodiment of an arc gun type molten metal droplet jetting device in accordance with the present invention.
- An arc gun type molten metal droplet jetting device 11' includes an arc gun 14', a power supply unit 15', for supplying powers to the first electrode 14b' and the second electrode 14d' in the arc gun 14' and a control unit 16' for controlling process conditions for a proper amount of the molten metal droplets 12 according to information of the portion to be welded sent from the monitoring device 13.
- the arc gun 14' includes a wire entrance 14a', the first electrode 14b' contacting the provided welding wire 6 for supplying a power thereto, the second electrode 14d' which polarity is opposite to that of the first electrode 14b' and generates an arc in a space between the front end of the welding wire 6 to melt the front end of the welding wire 6 thereby transferring or spraying the molten metal droplets 12 to the portion to be welded through the opening 14e', an insulation block 14c' placed between the two electrodes 14b' and 14d' for insulating between them and a discharge opening 14e'.
- the arc gun type molten metal droplet jetting device 11' melts the front end of the welding wire 6 by means of the arc generated in the space between the welding wire 6 and the second electrode 14d' having a polarity opposite to that of the welding wire 6, and then sprays the generated molten metal droplets 12 onto the portion to be welded on the target object 9.
- the arc gun 14' such that the second electrode can be separated and replaced from an upper portion including the insulation block 14c' and above. In this case, a distance between the welding wire 6 and the second electrode 14d' and the thickness of the second electrode can be easily regulated.
- FIG. 4 presents a schematic diagram showing an embodiment of a gas nozzle gun type molten metal droplet jetting device in accordance with the present invention.
- a gas nozzle gun type molten metal droplet jetting device 11 includes a gas nozzle gun 14", a small-size beam generating unit 17", a small-size beam control unit 18" and a small-size beam focus regulating unit 19" which serve as a small-size beam emitting unit for emitting a small-size high energy density beam 20" to melt the front end of the welding wire 6 introduced into the gas nozzle gun 14", and a pressure gas supply unit 21" to introduce a pressure gas into the gas nozzle gun 14", wherein the pressure gas separates the molten metal droplets 12 generated at the front end of the welding wire 6 by emitted thereon the small-size high energy density beam 20" and generates a spraying force thereof.
- the gas nozzle gun 14" includes a wire entrance 14a" through which the welding wire 6 is introduced and a discharge opening 14e" through which the molten metal droplets 12 generated by melting the front end of the welding wire 6 are discharged.
- the gas nozzle gun type molten metal droplet jetting device 11" melts the front end of the welding wire 6 by means of the small-size high energy density beam 20" to generate the molten metal droplets 12, supplies a pressure gas to separate the generated molten metal droplets from the welding wire 6, and sprays the molten metal droplets onto the portion to be welded on the target object 9.
- the high energy density beam welding system using molten metal droplet jetting in accordance with the present invention transfers or sprays the molten metal droplets 12 onto the gap in the portion to be welded on the target object 9 thereby making it possible to form a welding even where the gap is relatively wide with a high efficiency.
- the high energy density beam welding system using molten metal droplet jetting in accordance with the present invention can be applied not only to welding but also to such joining processes as brazing and cladding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/596,108 US7915562B2 (en) | 2004-05-12 | 2005-05-12 | High energy density beam welding system using molten metal droplet jetting |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020040033611A KR100621786B1 (ko) | 2004-05-12 | 2004-05-12 | 용융액적 투사를 이용하는 고밀도 에너지빔 용접 시스템 |
| KR10-2004-0033611 | 2004-05-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2005108002A1 true WO2005108002A1 (en) | 2005-11-17 |
Family
ID=35320101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2005/001401 WO2005108002A1 (en) | 2004-05-12 | 2005-05-12 | High energy density beam welding system using molten metal droplet jetting |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US7915562B2 (ko) |
| KR (1) | KR100621786B1 (ko) |
| WO (1) | WO2005108002A1 (ko) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140008339A1 (en) * | 2012-07-06 | 2014-01-09 | Lincoln Global, Inc. | Method and system for removing material from a cut-joint |
| DE102016010504A1 (de) * | 2016-08-29 | 2018-03-01 | Hochschule Mittweida (Fh) | Verfahren und Einrichtung zum Aufbau eines Werkstücks auf einem Träger mit Laserstrahlung eines Lasers, Werkstoffzufuhr mit einer an eine Steuereinrichtung gekoppelten Fördereinrichtung und Bewegungseinrichtungen |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4309589A (en) * | 1978-07-25 | 1982-01-05 | National Research Institute For Metals | Method and apparatus for electron beam welding |
| JPS58184083A (ja) * | 1982-04-22 | 1983-10-27 | Nippon Steel Corp | レ−ザ溶接法 |
| US4546230A (en) * | 1982-01-08 | 1985-10-08 | Kawasaki Steel Corporation | Welding process using laser beam |
| JPH07171690A (ja) * | 1993-12-20 | 1995-07-11 | Toyota Motor Corp | アルミ鋳物の溶接方法 |
| US5616258A (en) * | 1995-04-16 | 1997-04-01 | Aerochem Research Laboratories Inc. | Process and apparatus for micro-arc welding |
| US6610959B2 (en) * | 2001-04-26 | 2003-08-26 | Regents Of The University Of Minnesota | Single-wire arc spray apparatus and methods of using same |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5395150A (en) * | 1977-01-31 | 1978-08-19 | Mitsubishi Heavy Ind Ltd | Beam welding by filler material adding system |
| US4251709A (en) * | 1978-12-29 | 1981-02-17 | Schumacher Berthold W | Process for joining metals |
| DE3834402C1 (ko) * | 1988-10-10 | 1989-05-03 | Kernforschungszentrum Karlsruhe Gmbh, 7500 Karlsruhe, De | |
| JPH04120259A (ja) * | 1990-09-10 | 1992-04-21 | Agency Of Ind Science & Technol | レーザ溶射法による機器・部材の製造方法および装置 |
| US6429402B1 (en) * | 1997-01-24 | 2002-08-06 | The Regents Of The University Of California | Controlled laser production of elongated articles from particulates |
| DE59710348D1 (de) * | 1997-11-06 | 2003-07-31 | Sulzer Markets & Technology Ag | Verfahren zur Herstellung einer keramischen Schicht auf einem metallischen Grundwerkstoff |
| US6203861B1 (en) * | 1998-01-12 | 2001-03-20 | University Of Central Florida | One-step rapid manufacturing of metal and composite parts |
| US6091043A (en) * | 1999-03-19 | 2000-07-18 | Ford Global Technologies, Inc. | Depositing metal upon an article |
| JP2003157949A (ja) * | 2001-11-26 | 2003-05-30 | Yazaki Corp | Ｆｐｃの接続方法 |
| US7250081B2 (en) * | 2003-12-04 | 2007-07-31 | Honeywell International, Inc. | Methods for repair of single crystal superalloys by laser welding and products thereof |
-
2004
- 2004-05-12 KR KR1020040033611A patent/KR100621786B1/ko not_active IP Right Cessation
-
2005
- 2005-05-12 WO PCT/KR2005/001401 patent/WO2005108002A1/en active Application Filing
- 2005-05-12 US US11/596,108 patent/US7915562B2/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4309589A (en) * | 1978-07-25 | 1982-01-05 | National Research Institute For Metals | Method and apparatus for electron beam welding |
| US4546230A (en) * | 1982-01-08 | 1985-10-08 | Kawasaki Steel Corporation | Welding process using laser beam |
| JPS58184083A (ja) * | 1982-04-22 | 1983-10-27 | Nippon Steel Corp | レ−ザ溶接法 |
| JPH07171690A (ja) * | 1993-12-20 | 1995-07-11 | Toyota Motor Corp | アルミ鋳物の溶接方法 |
| US5616258A (en) * | 1995-04-16 | 1997-04-01 | Aerochem Research Laboratories Inc. | Process and apparatus for micro-arc welding |
| US6610959B2 (en) * | 2001-04-26 | 2003-08-26 | Regents Of The University Of Minnesota | Single-wire arc spray apparatus and methods of using same |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100621786B1 (ko) | 2006-09-14 |
| US20080029501A1 (en) | 2008-02-07 |
| US7915562B2 (en) | 2011-03-29 |
| KR20050108273A (ko) | 2005-11-16 |
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