WO2008007620A2 - Welding method and weldment - Google Patents
Welding method and weldment Download PDFInfo
- Publication number
- WO2008007620A2 WO2008007620A2 PCT/JP2007/063568 JP2007063568W WO2008007620A2 WO 2008007620 A2 WO2008007620 A2 WO 2008007620A2 JP 2007063568 W JP2007063568 W JP 2007063568W WO 2008007620 A2 WO2008007620 A2 WO 2008007620A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- welding
- heat input
- wire
- amount
- polarity
- Prior art date
Links
- 238000003466 welding Methods 0.000 title claims abstract description 93
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000000463 material Substances 0.000 claims description 120
- 229910052751 metal Inorganic materials 0.000 claims description 30
- 239000002184 metal Substances 0.000 claims description 30
- 239000000945 filler Substances 0.000 claims description 10
- 229910000838 Al alloy Inorganic materials 0.000 claims description 7
- 239000013078 crystal Substances 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 abstract description 22
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 22
- 238000005266 casting Methods 0.000 abstract 2
- 230000010354 integration Effects 0.000 abstract 2
- 230000008018 melting Effects 0.000 description 12
- 238000002844 melting Methods 0.000 description 12
- 239000010953 base metal Substances 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 7
- 229910052573 porcelain Inorganic materials 0.000 description 4
- 239000011324 bead Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000003908 quality control method Methods 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004512 die casting Methods 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009432 framing Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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
- B23K9/00—Arc welding or cutting
- B23K9/09—Arrangements or circuits for arc welding with pulsed current or voltage
- B23K9/091—Arrangements or circuits for arc welding with pulsed current or voltage characterised by the circuits
- B23K9/092—Arrangements or circuits for arc welding with pulsed current or voltage characterised by the circuits characterised by the shape of the pulses produced
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/09—Arrangements or circuits for arc welding with pulsed current or voltage
- B23K9/091—Arrangements or circuits for arc welding with pulsed current or voltage characterised by the circuits
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/23—Arc welding or cutting taking account of the properties of the materials to be welded
-
- 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
Definitions
- the present invention relates to a welding method for welding two aluminum alloy workpieces, at least one of which has a material strength, using molten calcined material.
- Die-cast materials one of the aluminum casing materials, can produce high-precision parts with thin and complex shapes, and wrought materials such as extruded aluminum materials have excellent strength characteristics. These are widely used in fields such as automobiles, ships, and industrial machinery.
- JP-A-8-206838 requires a means for stirring the molten pool and a means for heating in addition to the ordinary arc welding equipment, and is an additional measure for reducing blowholes.
- the cost increases and the processing time for the additional calorie processing process is extended, leading to a decrease in production efficiency.
- the device described in Japanese Patent Application Laid-Open No. 2005-34868 requires an additional means for laser irradiation in the vicinity of the front boundary between the molten portion and the non-molten portion of the molten pool, in addition to the normal arc welding equipment. In addition, an additional device for reducing blow holes is required, resulting in an increase in cost.
- an object of the present invention is to suppress the occurrence of blowholes in a welded part without requiring additional equipment or processing steps other than normal arc welding equipment.
- One aspect of the present invention is a welding method, wherein at least one of the aluminum alloy workpieces having a material strength is weld-joined using a filler material, A welding method in which the polarity of the voltage applied to the workpiece is switched to perform AC arc welding, and the AC arc welding is performed with the heat input during welding to the above-mentioned material being 67.8 jZmm 2 or less. And
- Another aspect of the present invention is a welded product welded by a welding method, in a plan view of a molten metal in which the filler material and the workpiece are melted by heat input during the AC arc welding.
- EZD 0.168 less than E It is characterized by.
- FIG. 1 is a simplified overall configuration diagram of an AC arc welding apparatus showing an embodiment of the present invention.
- FIG. 2 is a cross-sectional view showing a state in which the fillet material and the wrought material are overlapped and welded with the fillet joint by the arc welding apparatus of FIG.
- FIG. 3 is a waveform diagram of welding current on the wire side by the welding power source device of FIG. 1.
- FIG. 4 is an X-ray transmission image projected from the top to the bottom in FIG. 2 after welding as an example for calculating the blowhole density.
- FIG. 5 is a graph showing the fracture form of the weldment in the correlation between the amount of heat input per unit thickness to the material and the polarity ratio during energization.
- FIG. 6 is a graph showing the correlation between the amount of heat input and blowhole density when the amount of gas contained in the material is Occ or more and 3 cc or less.
- FIG. 7 A graph showing the correlation between the amount of heat input and the blowhole density when the amount of gas contained in the material exceeds 3cc and below 4cc.
- FIG. 8 is a graph showing the correlation between the amount of heat input and the blowhole density when the amount of gas contained in the material exceeds 4 cc and is 5 cc or less.
- FIG. 9 A graph showing the correlation between the amount of heat input and the blowhole density when the amount of gas contained in the material exceeds 5 cc and below 6 cc.
- FIG. 10 A graph showing the correlation between the amount of heat input and the blowhole density when the amount of gas contained in the material exceeds 6cc and below 7cc.
- FIG. 11 A graph showing the correlation between the amount of heat input and blowhole density when the amount of gas contained in the porcelain material exceeds 7cc and below 8cc.
- FIG. 12 is a graph showing the correlation between the amount of heat input and blowhole density when the amount of gas contained in the material exceeds 8 cc and is less than lOcc.
- FIG. 1 is a simplified overall configuration of an AC arc welding apparatus showing an embodiment of the present invention.
- FIG. 1 As a workpiece to be welded by this AC arc welding apparatus, the aluminum alloy alloy material 1 and the aluminum alloy material wrought material 3 are overlapped with each other, and one of them is the end of the wrought material 3 plate material. Fillet joint welding is performed between the other plate material 1 on the frame material 1.
- These material 1 and wrought material 3 are installed on a base 4 that serves as an electrode.
- the pedestal 4 is provided with a recess 4a corresponding to a portion where an arc 23 described later is generated.
- the welding torch 5 accommodates a welding wire 7 as a filler material so as to be movable in the vertical direction in FIG. 1, and sequentially feeds the wire 7 from the lower end toward the lower welding portion.
- a pair of wire feeding rollers 11 that are rotated by a wire feeding motor 9 are disposed above the welding torch 5, and the wire 7 is fed downward by the rotation of the wire feeding roller 11.
- the wire feeding motor 9 described above is driven by receiving the feeding control signal Ms transmitted from the welding power source device 13, and rotates the wire feeding roller 11.
- one electrode terminal 15 is connected to the welding torch 5 by the wiring 17 and the other electrode terminal 19 is connected to the base 4 by the wiring 21.
- the welding power source device 13 outputs the welding voltage V between these electrode terminals 15 and 19, so that the tip of the welding wire 7 fed out from the welding torch 5, the framing material 1 and the stretched material As a result, an arc 23 is generated, and as a result, the material 1, the wrought material 3 and the wire 7 are melted to form a molten metal 25 as shown in FIG.
- the wrought material 3 is welded.
- the heat-affected zone 27 maintains the solid state just by changing the crystal structure without melting the workpiece!
- FIG. 3 shows a welding current waveform on the wire 7 side by the welding power source device 13 described above.
- the time for wire 7 to have positive polarity is Tl, and the time for wire 7 to be negative is ⁇ 2.
- time ⁇ 3 is the energization time of the base current.
- the current values at these times Tl, ⁇ 2, ⁇ 3 are II, 12, 13 respectively.
- one energization cycle is the force that is the addition time of time T1 and time ⁇ 2.
- the integrated value at time T1 when wire 7 becomes positive is ⁇ , and wire 7 is negative.
- the integral value I ⁇ I at the time ⁇ 2 when the wire 7 becomes the negative electrode as described above is expressed as one turn of the current.
- the ratio divided by the integrated value (A + IBI) at the period (T1 + T2) is the polarity ratio C, and this polarity ratio C is adjusted so that it is 0.128 or more as described above.
- the amount of heat input to the enclosure material 1 contained in is reduced to 67.8 jZmm 2 (corresponding to the heat input per unit plate thickness) or less, and the blowholes in the molten metal 25 and the heat-affected zone 27 are reduced. Occurrence is suppressed.
- the energization waveform is not limited to that shown in FIG. 3, and the integral value A when the wire 7 becomes the positive electrode and the integral when the wire 7 becomes the negative electrode are integrated.
- IBIZ (A + IBI) 0.128 or more with the value IBI.
- the joining form in the arc welding is energized between the welding wire constituting the electrode and the work, and by the heat energy of the arc plasma generated by energization, the welding wire 7 and
- the welded material (molten metal 25), which is formed by melting the workpiece (figure material 1 and wrought material 3) and solidifying the three molten metals, forms a pair of the fender material 1 and the wrought material. Joining with 3 is performed.
- the form of formation of the molten metal 25 described above largely depends on the amount of current flowing between the welding wire 7 constituting the electrode and the pair of coils, and the energization direction associated with the polarity setting between the electrodes.
- the current value is a factor related to the magnitude of the thermal energy of the arc plasma that melts the three metals
- the energization direction is the distribution of the thermal energy of the arc plasma to the wire and workpiece that form the electrode. It becomes a factor related to.
- the direction of energization includes a force determined by the polarity setting of the electrode, and the polarity of the wire, the reverse polarity with the wire as the positive polarity, and the positive polarity with the wire as the negative polarity.
- Reverse polarity energization and positive polarity The difference from electricity is the difference in the amount of thermal energy distributed in the arc plasma.
- the characteristic of the reverse polarity that makes the wire positive is that the amount of heat energy distributed to the base material 1 that becomes the base material constituting the cathode that emits electrons increases, and the base material is mainly heated and melted.
- the wire serving as the positive electrode the amount of distribution of thermal energy is reduced, and heating / melting is concentrated at the tip of the carrier into which electrons flow, and the amount of melting is reduced.
- the positive polarity characteristic of the wire being negative is that the distribution of thermal energy is mainly the wire that becomes the cathode, and the electron that emits the wire force is also the overall force of the wire including the tip. Since the whole wire is melted, the amount of melting of the wire increases. On the other hand, at this time, the base material is melted by indirect heat input due to the heat of melting of the wire molten metal that lands on the base material, so that the base material is less heated and melted.
- the main part of the heating and melting is the wire 7, and the heating / melting of the base material is caused by indirect heat input accompanying the landing of the molten metal. It becomes the main heat source.
- the blowholes in the molten metal 25 are reduced because the amount of melting of the base material is small.
- the deposition of gas in the heat affected zone 27 of the base metal is reduced due to less heating of the base material, and the occurrence of blowholes is reduced.
- the wire 7 Polarity ratio C force 0.128 or more is obtained by dividing the integral value IBI at time T2 when I becomes negative by dividing the integral value IBI by the integral value (A + IB
- FIG. 4 shows an X-ray transmission image projected from the top to the bottom in FIG. 2 after welding as an example of calculating the blowhole density in the molten metal 25 and the heat-affected zone 27 around the molten metal 25.
- the total area E in plan view of the blowhole BH formed in the molten metal 25 and the heat affected zone 27 is defined as the area in plan view of the molten metal 25 (enclosed by the outline 25a of the molten metal 25).
- the area ratio EZD divided by D is the blowhole density F.
- the heat input of the polarity ratio C described above and 0.128 or more, and to ⁇ material 1 With 67. 8jZmm 2 below, the blowhole density F, 0. Less than 168. As a result, the influence of blowholes on the welding strength can be avoided.
- the vertical axis (Y) represents the heat input to the material 1 (jZmm 2 : equivalent to the heat input per unit thickness)
- the horizontal axis (X) is the polarity ratio C (in this case, expressed as a percentage obtained by multiplying the polarity ratio C by 100), and is a graph showing the form of fracture when an external force is appropriately applied to the cake. In this graph!
- X indicates the case where the molten metal 25 broke (hereinafter referred to as bead rupture), and ⁇ represents the case where the material 1 broke (hereinafter referred to as base metal rupture).
- the heat input per unit plate thickness (JZmm 2 ) to the material 1 is the current value (A) X voltage value (V) X (
- the gas amount G contained in the casing material 1 is set to 0cc ⁇ G ⁇ 7cc.
- the data of the three points on the vertical axis where the polarity ratio C is 0% is for DC pulse welding. Increase the polarity ratio C on the horizontal axis sequentially! ], It can be seen that the heat input per unit plate thickness is reduced by the following formula, and the heat input can be controlled by the polarity ratio C.
- the form of the base material fracture indicated by the circle can be achieved by setting the heat input per unit plate thickness to 67.8 jZmm 2 or less.
- the polarity ratio C in order to make the heat input 67.8 jZmm 2 or less, it is necessary to set the polarity ratio C to 12.8% or more.
- the material composition 1 shown in Table 1 was used for the reinforced material 1, the wrought material 3 and the wire 7 which also have an aluminum alloy strength.
- the horizontal axis represents the heat input (jZmm 2 ) described above, and the vertical axis represents the blowhole density F (here, expressed as a percentage obtained by multiplying the blowhole density F by 100).
- the fracture mode in the relationship is indicated by the difference in the amount of gas G contained in the material (base material) 1. The gas amount was measured by the “Lansley method” for samples collected from the vicinity of the weld.
- FIG. 6 shows the case where the gas amount G described above is 0 to 3 cc, which is very small relative to the material lOOg.
- the bead fracture occurs in FIG.
- the blowhole density is less than the upper limit of 16.8%, and the base metal fracture form indicated by ⁇ is obtained.
- Figure 7 shows the force when the gas amount G is 3cc ⁇ G ⁇ 4cc with respect to the material lOOg.
- the base material breaking morphological force indicated by a circle is 16 for the blowhole density. It can be obtained at less than 8%, and the heat input can be obtained at 67.8 jZmm 2 or less. Further, the 78JZmm 2 beyond, 8 jZmm 2 in heat input corresponds to the degree of the DC pulse welding hereinafter, also indicates that the blowhole density 16. less than 8% which is a condition of the base material fracture is not satisfied is doing.
- the base metal gas content should be 3 cc or less. It is necessary to do.
- Figure 8 shows the case where the amount of gas is 4cc ⁇ G ⁇ 5cc relative to the material lOOg
- Figure 9 shows the case where the amount of gas is 5 cc ⁇ G ⁇ 6cc. , heat input 67. 8jZmm 2 or less, the blowhole density 16. less than 8%, indicating that the parent material breaks form shown by .smallcircle obtained.
- Fig. 10 shows the case where the gas amount is 6cc ⁇ G ⁇ 7cc relative to the material lOOg. Also in this case, 4cc ⁇ G ⁇ 5cc, 5cc ⁇ G in Fig. 8 and Fig. 9 above. like those in ⁇ 6Cc, heat input 6 7. 8jZmm 2 or less, the blowhole density 16. less than 8%, so the results obtained are the base material breaking mode shown in .smallcircle, Ru.
- Figure 11 shows that the amount of gas is 7 cc ⁇ G ⁇ 8 cc relative to the material lOOg, and when the amount of gas G exceeds 7 cc, the heat input is 67.8 jZmm 2 or less and the blowhole density 16. Less than 8%, it can be seen that the bead fracture shape indicated by X is observed.
- Fig. 12 shows the case where the gas amount is 8 cc ⁇ G ⁇ 10 cc with respect to the material lOOg.
- the heat input and blow hole density conditions that can be obtained in the base metal fracture mode are included.
- the correlation between the amount of heat and the professional hole density is also reversed from the case where the gas amount G is 8 cc or less, and the blowhole density cannot be explained from the logic side because of the amount of heat input, and is outside the scope of the present invention Is shown.
- the base metal fracture mode is not limited by the heat input and blow hole density, and it is speculated that the fracture mode will involve other factors other than the blow hole. Therefore, the present invention is not applicable.
- the gist of the present invention is to control the amount of welding heat input to the aluminum casing material, which is a base material, in the arc welding between the aluminum casing material and the aluminum wrought material.
- the generation density is adjusted to be equal to or lower than the density at which the base material fracture form is obtained.
- Factors directly related to the occurrence of blowholes are the amount of gas G contained in the porcelain base material causing blowholes and the amount of heat input to the base material related to precipitation of the amount of gas.
- the polarity ratio when performing the AC arc welding and 0.128 or more, the heat input to ⁇ preform, 67. 8jZmm 2 By following the blow hole density, 16. To be less than 8%.
- the upper limit value of the gas amount G contained in the directly related base material when the blowhole density is less than 16.8% is 7 cc as described above.
- the upper limit value of the gas amount G is more than twice as large as the limit value in DC pulse welding is 3cc.
- the polarity ratio during AC arc welding is 0.128 or more, and the heat input to the base material is 67.
- the blowhole density can be reduced to less than 16.8%, which gives a base metal fracture form, resulting in a reduction in the forging cost and welding cost of the material. Quality control becomes easier and productivity is improved.
- a welded structure In particular, a structure such as a vehicle body or a suspension in an automobile bears an external force accompanying the traveling of the automobile, so that reliability of welding quality is ensured, especially welding. Ensuring strength, specifically, the fracture mode is not the molten metal 25 but the base metal fracture, which is an essential prerequisite.
- the base material fracture form can be obtained by setting the polarity ratio to 0.128 or more. The welding strength is ensured.
- the example in which the filler material 1 and the wrought material 3 are overlapped fillet joint welded is shown, but a butt joint, a T joint, a cross joint, a corner joint, an edge joint, etc.
- the present invention can be applied to all arc welded joints of an aluminum material and an aluminum wrought material.
- the weld manufactured by the method of the present invention can avoid the effect of blowholes on the weld strength.
- the heat input to the material is reduced. This can suppress the occurrence of blowholes in the heat-affected zone where the crystal structure in the molten metal and its surroundings changes, and the strength of the welded part can be increased. In this case, no additional equipment or processing steps are required other than the normal arc welding equipment.
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Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/373,212 US8101886B2 (en) | 2006-07-11 | 2007-07-06 | Welding article and welding method of carrying out an alternating current arc welding |
CN200780025996XA CN101489710B (zh) | 2006-07-11 | 2007-07-06 | 焊接方法及焊接物 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006190355A JP2008018436A (ja) | 2006-07-11 | 2006-07-11 | 溶接方法および溶接物 |
JP2006-190355 | 2006-07-11 |
Publications (2)
Publication Number | Publication Date |
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WO2008007620A2 true WO2008007620A2 (en) | 2008-01-17 |
WO2008007620A3 WO2008007620A3 (fr) | 2008-03-27 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/JP2007/063568 WO2008007620A2 (en) | 2006-07-11 | 2007-07-06 | Welding method and weldment |
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US (1) | US8101886B2 (ja) |
JP (1) | JP2008018436A (ja) |
CN (1) | CN101489710B (ja) |
WO (1) | WO2008007620A2 (ja) |
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US8304093B2 (en) * | 2010-03-09 | 2012-11-06 | United Technologies Corporation | Apparatus and method for preferential formation of weld joint |
CN102079004B (zh) * | 2010-12-31 | 2016-06-22 | 陕西国德电气制造有限公司 | 铝合金对接环缝无衬垫单面焊双面成形自动tig焊接方法 |
CN102151960B (zh) * | 2010-12-31 | 2016-02-10 | 陕西国德电气制造有限公司 | 一种铝合金壳体内焊缝自动tig重熔成型方法 |
JP6555824B2 (ja) * | 2014-02-24 | 2019-08-07 | 株式会社ダイヘン | アーク溶接方法 |
US10052706B2 (en) * | 2014-04-04 | 2018-08-21 | Lincoln Global, Inc. | Method and system to use AC welding waveform and enhanced consumable to improve welding of galvanized workpiece |
JP6114785B2 (ja) * | 2015-05-29 | 2017-04-12 | 日新製鋼株式会社 | 溶接部外観と溶接強度に優れた溶融Zn系めっき鋼板のアーク溶接方法、および溶接部材の製造方法 |
CN108472758B (zh) * | 2016-02-04 | 2020-05-08 | 松下知识产权经营株式会社 | 脉冲电弧焊接控制方法以及脉冲电弧焊接装置 |
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JP4319586B2 (ja) * | 2004-06-23 | 2009-08-26 | 株式会社ダイヘン | 交流パルスアーク溶接方法 |
US7271365B2 (en) * | 2005-04-11 | 2007-09-18 | Lincoln Global, Inc. | System and method for pulse welding |
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2006
- 2006-07-11 JP JP2006190355A patent/JP2008018436A/ja active Pending
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2007
- 2007-07-06 CN CN200780025996XA patent/CN101489710B/zh active Active
- 2007-07-06 US US12/373,212 patent/US8101886B2/en active Active
- 2007-07-06 WO PCT/JP2007/063568 patent/WO2008007620A2/ja active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2002346786A (ja) * | 2001-05-25 | 2002-12-04 | Kobe Steel Ltd | アルミニウム合金材の溶接方法 |
JP2006150439A (ja) * | 2004-11-05 | 2006-06-15 | Kobe Steel Ltd | 鉄鋼−アルミニウム溶接継手およびその溶接方法 |
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JP2008018436A (ja) | 2008-01-31 |
CN101489710A (zh) | 2009-07-22 |
US8101886B2 (en) | 2012-01-24 |
US20090230108A1 (en) | 2009-09-17 |
CN101489710B (zh) | 2012-03-21 |
WO2008007620A3 (fr) | 2008-03-27 |
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