WO2016009530A1 - シーム溶接方法及びその装置 - Google Patents
シーム溶接方法及びその装置 Download PDFInfo
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- WO2016009530A1 WO2016009530A1 PCT/JP2014/069068 JP2014069068W WO2016009530A1 WO 2016009530 A1 WO2016009530 A1 WO 2016009530A1 JP 2014069068 W JP2014069068 W JP 2014069068W WO 2016009530 A1 WO2016009530 A1 WO 2016009530A1
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- seam welding
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- roller electrode
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/06—Resistance welding; Severing by resistance heating using roller electrodes
-
- 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/06—Resistance welding; Severing by resistance heating using roller electrodes
- B23K11/061—Resistance welding; Severing by resistance heating using roller electrodes for welding rectilinear seams
-
- 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/16—Resistance welding; Severing by resistance heating taking account of the properties of the material 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/24—Electric supply or control circuits therefor
-
- 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/30—Features relating to electrodes
- B23K11/3036—Roller electrodes
-
- 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/30—Features relating to electrodes
- B23K11/31—Electrode holders and actuating devices therefor
- B23K11/314—Spot welding guns, e.g. mounted on robots
- B23K11/315—Spot welding guns, e.g. mounted on robots with one electrode moving on a linear path
-
- 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
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/24—Electric supply or control circuits therefor
- B23K11/241—Electric supplies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/006—Vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/18—Sheet panels
-
- 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
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
Definitions
- the present invention relates to a seam welding method and apparatus for rotating and relatively moving a roller electrode while intermittently energizing between a pair of roller electrodes that sandwich and pressurize a laminate in which a plurality of workpieces are laminated. About.
- the roller electrode may be separated from the molten portion before the molten portion is sufficiently solidified during the interruption period.
- the melted portion is solidified in a state where the pressure applied by the roller electrode is reduced or not applied, and cracking is likely to occur due to volume shrinkage or the like when the melted portion solidifies.
- the ratio of the interruption period in the one cycle is increased (for example, 32 msec).
- the ratio of the interruption period can be increased with respect to the energization period (16 msec), and the timing for starting the solidification of the molten portion can be accelerated.
- the melted part can be solidified in a state where a pressure is applied to the melted part.
- a seam welding method disclosed in JP-A-11-58026 That is, a first welding current P of heat input capable of forming a melted portion and a second welding current B having a smaller heat input than the first welding current P are alternately energized to provide an interruption period in which the welding current is interrupted. Without seam welding.
- the molten part is solidified while the second welding current B is applied, so that it is possible to avoid the laminate from being cooled more than necessary, while the molten part It is difficult to solidify quickly and sufficiently. Therefore, as described above, when the welding speed is increased, the roller electrode may move from above the melted portion before the melted portion is sufficiently solidified, which may cause cracks due to insufficient pressure during solidification. . Eventually, even if the seam welding method described in Japanese Patent Laid-Open No. 11-58026 is adopted, it is difficult to obtain a high-quality bonded product in which cracking, spatter and the like are suppressed while increasing the welding speed.
- the present invention has been made to solve the above-described problem, and provides a seam welding method and apparatus capable of obtaining a high-quality bonded product in which cracking, spatter, and the like are suppressed while increasing the welding speed.
- the purpose is to do.
- the present invention intermittently energizes between a pair of roller electrodes that sandwich a laminated body in which a plurality of workpieces are laminated, and applies pressure to the laminated body.
- a heating period in which a heating current smaller than the melting current is applied and the laminate is heated within a temperature range in which the melting part solidifies, and before and after the heating period
- the seam welding is performed while repeating an interruption period in which energization between the roller electrodes is interrupted as one cycle.
- the laminated body is heated within a temperature range (for example, less than the freezing point) at which the melted portion solidifies. For this reason, the melting part can be solidified despite being heated. That is, the interruption period and the heating period in one cycle are periods (solidification periods) in which the molten part can be cooled and solidified.
- the heating period is provided in this way, the ratio of the solidification period to the melting period in one cycle can be increased, so that the timing for starting solidification of the molten part can be advanced. As a result, even if the welding speed is increased, it is possible to avoid separation of the roller electrode from the melted part before the melted part solidifies, so that the melted part can be solidified while applying sufficient pressure. become.
- the heating period in the one cycle may be provided before the interruption period.
- one cycle is set in the order of the melting period, the heating period, and the interruption period. That is, after a melting current is applied during the melting period to form a melted portion, a heating current smaller than the melting current is supplied during the heating period. Thereby, in a heating period, it can heat so that a laminated body may not be cooled rapidly or may be cooled more than necessary.
- the temperature for heating the laminate is within the range of the temperature at which the molten part solidifies
- the solidification of the molten part can be started immediately after the melting period. That is, the melted portion can be solidified in a state where the pressure applied by the roller electrode is sufficiently applied, and the occurrence of cracks and the like can be suppressed. Furthermore, by providing an interruption period for interrupting energization after the heating period, the melted portion can be sufficiently solidified to form a good nugget between the workpieces.
- the heating period in the one cycle may be provided after the interruption period.
- one cycle is set in the order of a melting period, an interruption period, and a heating period. That is, after a melting current is applied during the melting period to form a melted part, the energization is interrupted and the interrupting period is set to solidify the molten part. And after this interruption period, in other words, before the next one cycle melting period, a heating period is provided, and a heating current is applied to the laminated body within a temperature range in which the melting part solidifies. Can be preheated.
- a melting current can be applied to the laminated body that has been heated as described above and has an increased electrical resistance. This makes it possible to form the melted portion without increasing the melt current, and thus it is possible to effectively suppress the occurrence of sputtering.
- the ratio of the solidification period to the melting period in one cycle is increased by providing the heating period. , The timing of the start of coagulation can be accelerated. For this reason, even if the welding speed is increased, the melted portion can be solidified while applying pressure, and cracking of the nugget or the like can be suppressed. As a result, it is possible to obtain a high-quality bonded product while increasing the welding speed.
- the present invention intermittently energizes between a pair of roller electrodes that sandwich a laminate in which a plurality of workpieces are laminated, and relatively applies the roller electrodes while applying pressure to the laminate.
- a seam welding apparatus that performs seam welding by moving the roller electrode, and supplying a melting current to the roller electrode to form a melting portion between the workpieces, and a heating current smaller than the melting current.
- the heating period in the one cycle may be provided before the interruption period, and the heating period in the one period may be provided after the interruption period. Good.
- FIG. 1 is a schematic overall side view of an articulated robot including a seam welding device according to the present invention. It is a principal part perspective view of the seam welding apparatus of FIG. It is a timing diagram which shows the electricity supply cycle of the seam welding method which concerns on 1st Embodiment of this invention.
- FIG. 4A is an explanatory diagram of the roller electrode pair and the laminated body in the melting period
- FIG. 4B is an explanatory diagram of the roller electrode pair and the laminated body in the heating period
- FIG. 4C is an interruption period and the next one cycle. It is explanatory drawing of the roller electrode pair and laminated body in the fusion
- FIG. 6A is a timing diagram illustrating an example of an energization cycle of a seam welding method
- FIG. 6B is a timing diagram illustrating another example of an energization cycle of seam welding.
- FIG. 1 is a schematic overall side view of an articulated robot 12 including a seam welding apparatus 10 according to this embodiment
- FIG. 2 is a perspective view of a main part of the seam welding apparatus 10.
- the seam welding apparatus 10 is supported by a tip arm 14 of an articulated robot 12. Since the configuration of the articulated robot 12 including the seam welding apparatus 10 is known as described in, for example, Japanese Patent Application Laid-Open No. 2007-167896 and Utility Model Registration No. 3124033, the configuration of this articulated robot 12 is not limited. Detailed description is omitted.
- the seam welding apparatus 10 includes a first roller electrode 18 and a second roller electrode 20 that are supported on a tip arm 14 via a mount 16 (see FIG. 1).
- the second roller electrode 20 is a laminate 22.
- the first roller electrode 18 is positioned above the laminated body 22 while being positioned below (see FIG. 2). That is, the stacked body 22 is sandwiched between the first roller electrode 18 and the second roller electrode 20.
- the laminate 22 to be welded is configured by laminating workpieces 24 and 26, which are two metal plates, in this order from below.
- the workpieces 24 and 26 are made of, for example, JAC590, JAC780, or JAC980 (all of which are high-performance high-tensile steel plates defined in the Japan Iron and Steel Federation standard, so-called high-tensile materials).
- the thickness of each of the workpieces 24 and 26 is set to about 1 mm to about 2 mm, for example. Note that the number of workpieces to be stacked is not limited to the two shown in this example, and may be three or more.
- a guide rail 28 is laid on the mount 16.
- the guide rail 28 is instructed by a first cylinder and a second cylinder (each not shown).
- the first cylinder displaces the first roller electrode 18 supported by the first moving table 30 in a direction approaching or separating from the second roller electrode 20.
- the second cylinder displaces the second roller electrode 20 supported by the second moving table 32 in a direction approaching or separating from the first roller electrode 18. Only one of the first roller electrode 18 and the second roller electrode 20 is supported by the corresponding first moving table 30 or second moving table 32, and the other is fixed to a fixed table (not shown). It may be supported.
- the first moving table 30 supports a first rotating motor (not shown) for rotating and energizing the first roller electrode 18, and the second moving table 32 rotates the second roller electrode 20.
- a second rotating motor (not shown) for energizing is supported. Since such a configuration is known, illustration and detailed description are omitted.
- a servo motor or the like may be employed instead of the first cylinder and the second cylinder.
- the convex portion 34 of the guide rail 28 includes a concave portion 36 (see FIG. 2) of the first moving table 30 that supports the first roller electrode 18 and a concave portion 38 (see FIG. 2) of the second moving table 32 that supports the second roller electrode 20. 2) is slidably engaged.
- the first moving table 30 is connected to a first rod (not shown) of the first cylinder.
- the second moving table 32 is connected to a second rod (not shown) of the second cylinder.
- first roller electrode 18 is displaced in a direction (arrow Y2, Y1 direction) approaching or separating from the second roller electrode 20 as the first rod of the first cylinder moves back and forth.
- second roller electrode 20 is displaced in a direction (arrow Y1, Y2 direction) approaching or separating from the first roller electrode 18 as the second rod of the second cylinder moves back and forth.
- a first axis (not shown) is interposed between the first roller electrode 18 and the first moving table 30.
- the first roller electrode 18 rotates as the first shaft rotates under the action of the first rotating motor.
- the second roller electrode 20 rotates as the second shaft (not shown) rotates under the action of the second rotating motor.
- each of the first roller electrode 18 and the second roller electrode 20 can supply a welding current such as a DC inverter power supply or an AC power supply via a lead wire (power line) in which a switch is interposed. It is electrically connected to the positive and negative electrodes of a power source. By switching on / off of this switch, either a melting current or a heating current described later is passed between the first roller electrode 18 and the second roller electrode 20, or the current supply is interrupted. Is possible.
- the melting current and the heating current are collectively referred to as a welding current.
- the switch can employ
- the first and second cylinders, the first and second rotating motors, the AC power supply, and the switch are electrically connected to a control unit as a control means. That is, the operation or energization / energization of the first and second cylinders, the first and second rotating motors, the AC power supply, and the switch is controlled by the control unit. That is, the control unit also functions as energization timing control means.
- the seam welding apparatus 10 according to the present embodiment is basically configured as described above. Next, the operation and effect will be described in relation to the seam welding method according to the present embodiment.
- the articulated robot 12 moves the tip arm 14, that is, the seam welding apparatus 10 so that the laminated body 22 is disposed between the first roller electrode 18 and the second roller electrode 20.
- the first cylinder and the second cylinder are urged under the action of the control unit, and the first rod and the second rod start to move forward along with this. That is, the second roller electrode 20 is displaced in the direction of the arrow Y1 so as to approach the first roller electrode 18, and the arrow Y2 so that the first roller electrode 18 approaches the second roller electrode 20. Displaces in the direction. As a result, the laminate 22 is sandwiched between the first roller electrode 18 and the second roller electrode 20.
- the pressures (F1) of the first roller electrode 18 against the work 26 are balanced with the pressures (F2) of the second roller electrode 20 against the work 24.
- the propulsive force of the first rod and the second rod and the propulsive force of the second rod of the second cylinder are controlled.
- the first and second rotating motors are rotated at a predetermined number of rotations, whereby the first roller electrode 18 and the second roller electrode 20 (hereinafter collectively referred to as a roller electrode pair) Are also moved relatively at a predetermined speed in the direction of movement.
- the predetermined speed at which the roller electrode pair relatively moves can be set to, for example, 2.0 m / min.
- each of the first roller electrode 18 and the second roller electrode 20 is connected to the positive electrode and the negative electrode of the AC power supply. For this reason, while the switch is turned on, it is an energization period in which a welding current flows from the first roller electrode 18 toward the second roller electrode 20. Further, while the switch is turned off, it is an interruption period in which the welding current is cut off.
- the seam welding apparatus 10 intermittently energizes between the pair of roller electrodes that sandwich the laminated body 22, and applies the applied pressures F ⁇ b> 1 and F ⁇ b> 2 to the laminated body 22. Seam welding is performed by moving.
- FIGS. 3 and 4A to 4C are schematic explanatory diagrams showing the relationship between the energization cycle of FIG. 3 and the welded state of the laminate 22 in time series.
- one period of the energization cycle is about 48 msec.
- the switch is turned on between time points t1 and t2, and a melting period in which a melting current i1 is supplied between the roller electrode pairs is set.
- the melting current i ⁇ b> 1 is set to a magnitude that allows heating and melting by generating resistance heat at a portion near the contact surface of the workpieces 24 and 26. That is, the melted part 40a can be formed between the workpieces 24 and 26 by supplying a melt current i1 between the roller electrode pair during the melt period.
- the melting period may be about 16 msec.
- the magnitude of the melting current i1 may be appropriately set according to the material and shape of the workpieces 24 and 26, the length of the melting period, etc., and can be set to about 16 to 18 kA, for example.
- a heating period in which a heating current i2 smaller than the melting current i1 is supplied between the roller electrode pairs between time points t2 and t3.
- the heating current i2 is set to a size capable of heating the laminate 22 within a temperature range where the melting part 40a solidifies (for example, less than the freezing point of the melting part 40a). Therefore, in the heating period, the laminated body 22 is heated in order to solidify the melted portion 40a formed in the melting period and suppress the laminated body 22 from being rapidly cooled and unnecessarily cooled. be able to.
- the heating period here can be about 8 msec.
- the magnitude of the heating current i2 can be about 8 kA.
- the roller electrode pair moves relative to the laminated body 22, but at the time point t2 to t3 during the heating period, the roller electrode pair is sufficiently larger than the portion where the molten portion 40a of the laminated body 22 is formed. It is in the position which can give the sufficient pressurizing force F1, F2. Therefore, in the heating period, solidification of the melting part 40a can be started while applying sufficient pressures F1 and F2 from the roller electrode pair.
- the switch is turned off between time points t3 and t4, and the interruption period in which the energization of the welding current between the roller electrode pairs is interrupted. That is, in this time zone, heating (heating) in the vicinity of the contact surface between the workpieces 24 and 26 is interrupted. Thereby, the laminated body 22 is cooled by heat conduction from the laminated body 22 to the roller electrode pair. As a result, the nugget 42 can be formed by sufficiently solidifying the melting portion 40a.
- the interruption period is set to about 24 msec, for example.
- the roller electrode pair is relatively moved along the moving direction so as to be separated from the portion where the melted portion 40a of the laminated body 22 is formed.
- a new melting portion 40b can be formed between the workpieces 24 and 26 by turning on the switch and setting a melting period in which the melting current i1 is passed between the roller electrode pairs. it can.
- a new nugget (not shown) connected to the nugget 42 can be formed by repeating the next one cycle of the energization cycle in the same manner as described above. That is, since the nuggets are continuous through the overlapped portion, it is possible to obtain a welded product in which the workpieces 24 and 26 are firmly connected.
- the interruption period and the heating period in one cycle that is the energization cycle between the roller electrode pairs are periods during which the melting parts 40a, 40b, etc. can be cooled and solidified (solidification period).
- the ratio of the solidification period (for example, 32 msec) with respect to the melting period (for example, 16 msec) in one cycle (for example, 48 msec) is increased by providing the heating period, and solidification of the melting parts 40a, 40b, etc. is performed.
- the start timing can be advanced. As a result, even if the welding speed is increased, the roller electrode pair can be prevented from separating from the melted portions 40a, 40b, etc. before the melted portions 40a, 40b, etc. solidify. For this reason, it is possible to solidify the melted portions 40a, 40b and the like while applying sufficient pressures F1, F2.
- the heating current i2 is energized in the heating period of the coagulation period.
- An excessive increase in size can be avoided.
- it can avoid that the laminated body 22 is cooled more than necessary.
- it is possible to satisfactorily form the melted portions 40a and 40b between the workpieces 24 and 26 without increasing the melting current i1, so that the occurrence of sputtering or the like can be suppressed.
- it can suppress that the volume of the laminated body 22 changes rapidly by the temperature change between a melting period and a solidification period, it can suppress that a nugget 42 grade
- the welding speed can be increased without increasing the size of the seam welding apparatus 10.
- the seam welding apparatus 10 can be suitably mounted on the articulated robot 12. Further, even when the workpieces 24 and 26 are large parts such as those for automobile bodies, the workpieces 24 and 26 can be well seam-welded.
- Second Embodiment a seam welding method according to a second embodiment of the present invention will be described.
- the second embodiment is similar to the first embodiment except that the roller electrode pair is intermittently energized in the energization cycle shown in the timing diagram of FIG. This can be done using the device 10.
- the difference in the energization cycle between the first embodiment and the second embodiment is that the heating period in one cycle is provided after the interruption period. That is, in the second embodiment, first, during the time point t1 to t2, the switch is turned on, and a melting period in which the melting current i1 is supplied between the roller electrode pairs is set. Next, between time points t2 and t3, the switch is turned off, which is an interruption period in which energization of the welding current between the roller electrode pairs is interrupted. During the subsequent time points t3 to t4, a heating period in which a heating current i2 smaller than the melt current i1 is applied between the roller electrode pairs is set.
- the roller electrode pair While repeating the above one cycle, the roller electrode pair is moved relatively to form a plurality of nuggets that are continuous with each other through overlapping portions, and a welded product in which the workpieces 24 and 26 are firmly connected to each other is formed. It becomes possible to obtain.
- the melt current i1 is applied during the melting period to form the melted part, and then the energization is interrupted to enter the interruption period to solidify the melted part. Then, after this interruption period, in other words, before the next one melting period, a heating period is provided and a heating current i2 is energized so that the melting portion is solidified within a range of temperatures.
- the body 22 can be preheated. That is, in the next melting period of one cycle, the melting current i1 can be applied to the laminate 22 that has been heated as described above and has increased electrical resistance. Thereby, since the melted portion can be formed well without increasing the melt current i1, it is possible to effectively suppress the occurrence of sputtering.
- the melting period for example, 48 msec for one period (for example, 48 msec) is provided.
- the timing of the coagulation start can be advanced. For this reason, even if the welding speed is increased, the melted portion can be solidified while applying sufficient pressurizing forces F1 and F2, and cracking in the nugget or the like can be suppressed. As a result, it is possible to obtain a high-quality bonded product while increasing the welding speed.
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Abstract
Description
図1は、この実施形態に係るシーム溶接装置10を備える多関節ロボット12の概略全体側面図であり、図2は、シーム溶接装置10の要部斜視図である。このシーム溶接装置10は、多関節ロボット12の先端アーム14に支持されている。このようにシーム溶接装置10を備える多関節ロボット12の構成は、例えば、特開2007-167896号公報、実用新案登録第3124033号公報にも記載されるように公知であるため、この構成についての詳細な説明は省略する。
次に、本発明の第2実施形態に係るシーム溶接方法について説明する。本発明に係るシーム溶接方法について、第2実施形態は、図5のタイミング図に示す通電サイクルでローラ電極対間を断続的に通電することを除いては、第1実施形態と同様にシーム溶接装置10を用いて行うことができる。
Claims (6)
- 複数のワーク(24、26)を積層した積層体(22)を挟持する一組のローラ電極(18、20)間を断続的に通電するとともに、前記積層体(22)に対して加圧力を付与しつつ前記ローラ電極(18、20)を相対的に移動させてシーム溶接を行うシーム溶接方法であって、
前記ローラ電極(18、20)間に溶融電流(i1)を通電して、前記ワーク(24、26)間に溶融部(40a)を形成する溶融期間と、
前記ローラ電極(18、20)間に前記溶融電流(i1)よりも小さい加温電流(i2)を通電して、前記溶融部(40a)が凝固する温度の範囲内で前記積層体(22)を加温する加温期間と、
前記加温期間の前及び後ろの少なくとも一方に設けられ、前記ローラ電極(18、20)間の通電を中断する中断期間と、
を1周期として繰り返しつつシーム溶接を行うことを特徴とするシーム溶接方法。 - 請求項1記載のシーム溶接方法において、
前記1周期中の前記加温期間を、前記中断期間の前に設けることを特徴とするシーム溶接方法。 - 請求項1記載のシーム溶接方法において、
前記1周期中の前記加温期間を、前記中断期間の後に設けることを特徴とするシーム溶接方法。 - 複数のワーク(24、26)を積層した積層体(22)を挟持する一組のローラ電極(18、20)間を断続的に通電するとともに、前記積層体(22)に対して加圧力を付与しつつ前記ローラ電極(18、20)を相対的に移動させてシーム溶接を行うシーム溶接装置(10)であって、
前記ローラ電極(18、20)に対し、
溶融電流(i1)を通電して、前記ワーク(24、26)間に溶融部(40a)を形成する溶融期間と、
前記溶融電流(i1)よりも小さい加温電流(i2)を通電して、前記溶融部(40a)が凝固する温度の範囲内で前記積層体(22)を加温する加温期間と、
前記加温期間の前及び後の少なくとも一方に設けられ、前記ローラ電極(18、20)間の通電を中断する中断期間と、
を1周期とする通電及び通電停止を繰り返すことを特徴とするシーム溶接装置(10)。 - 請求項4記載のシーム溶接装置(10)において、
前記1周期中の前記加温期間を、前記中断期間の前に設けることを特徴とするシーム溶接装置(10)。 - 請求項4記載のシーム溶接装置(10)において、
前記1周期中の前記加温期間を、前記中断期間の後に設けることを特徴とするシーム溶接装置(10)。
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PCT/JP2014/069068 WO2016009530A1 (ja) | 2014-07-17 | 2014-07-17 | シーム溶接方法及びその装置 |
CA2955480A CA2955480C (en) | 2014-07-17 | 2014-07-17 | Seam-welding method and device therefor |
CN201480080655.2A CN106794543B (zh) | 2014-07-17 | 2014-07-17 | 缝焊方法及其装置 |
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