JP2017006942A - Jig for weldment and welding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress adhesion of spatter or the like generated by weldment to a work-piece.SOLUTION: A jig for weldment comprises: a base part having an arrangement surface on which work-pieces to be welded are arranged; an opposite part which is so located as to face the arrangement surface of the base part, and is provided with an opening which penetrates a first surface facing the base part to a second surface opposite to the first surface. In the jig, a suction hole is formed in the interior of the opposite part, one end of the suction hole constitutes a suction port which is formed on an inner wall surface of the opposite part constituting the opening, and the other end thereof constitutes a suction side communication port which is formed on an outer wall surface of the opposite part and can be communicated with a suction apparatus.SELECTED DRAWING: Figure 5

Description

  The technique disclosed in this specification relates to a welding jig.

  The welding jig includes a base portion on which a workpiece to be welded is disposed, and a facing portion disposed to face the base portion via the workpiece. An opening that is open so as to expose the welding target portion of the workpiece is formed in the facing portion, and the welding target portion of the workpiece is welded through the opening. Examples of workpieces to be welded include separators that constitute fuel cells (see Patent Documents 1 and 2).

JP 2011-161450 A JP 2010-129289 A

  When welding a workpiece, for example, spatter, which is fine particles scattered from the workpiece, and welding fume, which is solid fine particles cooled by a material evaporated by heat during welding, may be generated and adhere to the workpiece. Due to unevenness generated on the surface of the workpiece due to spatter and welding fumes adhering to the workpiece, other members cannot be assembled to the workpiece with high accuracy, or spatter adheres so as to straddle between the members to be insulated. This may cause a short circuit between members to be insulated.

  The present specification discloses a technique capable of solving at least a part of the problems described above.

  The technology disclosed in this specification can be implemented as the following forms.

(1) A welding jig disclosed in the present specification includes a base portion having an arrangement surface on which a workpiece to be welded is arranged, and an opposing portion arranged to face the arrangement surface of the base portion. And a facing jig formed with an opening that penetrates from the first surface facing the base portion to the second surface opposite to the first surface, of the outer wall surface. A suction hole is formed inside the facing portion, and one end of the suction hole constitutes a suction port formed on an inner wall surface of the facing portion constituting the opening, and the suction hole The other end is formed on the outer wall surface of the facing portion, and constitutes a suction side communication port capable of communicating with a suction device. When the workpiece disposed on the base portion is welded through the opening of the facing portion, spatter, welding spatter, or the like may occur from the workpiece. According to this welding jig, the generated spatter or the like is sucked into the suction device through the suction hole from the suction port formed on the inner wall surface of the opening. Therefore, it is possible to suppress spatter generated by welding from adhering to the workpiece.

(2) In the welding jig, the suction port is formed at a position closer to the first surface than the second surface in the inner wall surface of the facing portion. It is good also as a structure. According to this welding jig, compared to the case where the suction port is formed at a position closer to the second surface than the first surface, the spatter and the like can be generated by sucking the sputter and the like at a position closer to the workpiece. It is good also as a structure which can suppress more reliably that it adheres to a workpiece | work.

(3) In the welding jig, the inner wall surface of the opening includes a first inner wall portion and a second inner wall having an opening angle toward the second surface side larger than that of the first inner wall portion. And the suction port may be formed in the first inner wall portion. According to this welding jig, spatter and the like are scattered from the opening to the outside as compared with the case where the suction port is formed in the second inner wall portion having a relatively large opening angle to the second surface side. It is good also as a structure which can suppress adhering to a workpiece | work.

(4) In the welding jig, the inner wall surface of the opening has a first inner wall surface and a second inner wall surface facing each other, and the suction port is formed on the first inner wall surface. In addition, a supply hole is further formed in the facing portion, and one end of the supply hole constitutes a supply port formed in the second inner wall surface of the opening, and the other of the supply hole The end may be formed on the outer wall surface of the facing portion, and may constitute a supply-side communication port that can communicate with a supply device that supplies gas. According to this welding jig, an opening may be formed, and a supply port and a suction port may be formed on the first inner wall surface and the second inner wall surface facing each other. For this reason, by forming a smooth air flow path from the supply port to the suction port, spatter generated by welding can be sucked smoothly to the suction port. It is good also as a structure which can suppress more reliably.

(5) In the welding jig, the supply port is formed at a position closer to the first surface than the second surface in the inner wall surface of the facing portion. It is good also as a structure. According to this welding jig, it is supplied by supplying gas at a position closer to the workpiece as compared with the case where the supply port is formed at a position closer to the second surface than the first surface. It is good also as a structure which can suppress that a sputter | spatter etc. are scattered outside the opening part and adhering to a workpiece | work with gas.

(6) In the welding jig, the inner wall surface of the opening is positioned closer to the second surface side than the first inner wall portion and the first inner wall portion, and the second surface side. And a second inner wall portion having a larger opening angle than the first inner wall portion, and the supply port may be formed in the first inner wall portion. According to this welding jig, compared to the case where the supply port is formed in the second inner wall portion where the opening angle to the second surface side is relatively large, the spatter generated by welding is the opening portion. It is good also as a structure which can suppress that it spreads from the outside and adheres to a workpiece | work.

(7) In the welding apparatus, the welding jig and a suction valve that switches between an open state in which the suction gas flow path from the suction port to the suction apparatus is opened and a closed state in which the suction gas flow path is closed. A supply valve that switches between a supply gas flow path from the supply device to the supply port and a closed condition that closes the supply gas flow path, and the suction valve open condition and the closed condition. It is good also as a structure provided with the control part which controls switching with a state and switching with the said open state and the said closed state of the said supply valve. According to this welding apparatus, it is good also as a structure which can control appropriately opening and closing of a supply valve and a suction valve.

(8) In the welding apparatus, when the welding of the workpiece is started, the control unit moves the suction valve from the closed state to the open state before the supply valve is switched from the closed state to the open state. It is good also as a structure characterized by controlling so that it may switch to. According to this welding apparatus, compared to the case where the suction valve is switched from the closed state to the open state after the supply valve is switched from the closed state to the open state, the spatter or the like is generated when the workpiece is welded. It is good also as a structure which can suppress scattering outside and adhering to a workpiece | work.

(9) In the welding apparatus, when the welding of the workpiece is finished, the control unit is configured so that the supply valve is changed from the open state to the closed state before the suction valve is switched from the open state to the closed state. It is good also as a structure characterized by controlling so that it may switch to. According to this welding apparatus, after the suction valve is switched from the open state to the closed state, it is possible to suppress spatter and the like from adhering to the workpiece as compared with the case where the supply valve is switched from the open state to the closed state. It is good.

  The technology disclosed by this specification can be implemented in various forms. For example, the present invention can be realized in the form of a control method and welding apparatus for a welding apparatus, a computer program for realizing the functions of the method or apparatus, a non-temporary recording medium on which the computer program is recorded, and the like.

It is a mimetic diagram showing the outline composition of welding system 1 of a 1st embodiment. 1 is a perspective view showing an external configuration of a fuel cell stack 100. FIG. It is explanatory drawing which shows the XZ cross-section structure of the electric power generation unit 102 in the position of III-III of FIG. It is explanatory drawing which shows the YZ cross-section structure of the electric power generation unit 102 in the position of IV-IV of FIG. 2 is a perspective view showing a schematic configuration of a welding jig 200. FIG. 4 is an explanatory diagram showing an XY plane configuration on the upper side of a welding jig 200. FIG. It is explanatory drawing which shows XY plane structure of the upper side of the jig 200 for welding in the state from which the 2nd opposing member 270 was removed. It is explanatory drawing which shows the XZ cross-section structure of the PX part in the position of VIII-VIII of FIG. 4 is a time chart showing operations of the laser output machine 10, the suction valve 500, and the supply valve 600. It is a perspective view which shows the external appearance structure of the welding jig | tool 200 of 2nd Embodiment.

A. First embodiment:
A-1. Configuration of welding system 1:
FIG. 1 is a schematic diagram showing a schematic configuration of the welding system 1. The welding system 1 includes a laser output machine 10, a welding device 20, a suction device 30, and a supply device 40. The laser output machine 10 is a laser beam welder that irradiates and welds a workpiece W1 to be welded with a laser beam L. The welding apparatus 20 includes a welding jig 200 that holds the workpiece W1, a suction valve 500, a supply valve 600, a moving table 700, and a control unit 800. Hereinafter, the component parts of the fuel cell stack 100 will be described as an example of the workpiece W1 to be welded.

(Configuration of fuel cell stack 100)
FIG. 2 is an external perspective view schematically showing the configuration of the fuel cell stack 100. FIG. 2 shows XYZ axes orthogonal to each other for specifying the direction. In this specification, for convenience, the positive Z-axis direction is referred to as the upward direction, and the negative Z-axis direction is referred to as the downward direction. Depending on the installation mode of the fuel cell stack 100, the direction corresponding to each axis may change. The same applies to FIG.

  The fuel cell stack 100 includes a plurality of power generation units 102 arranged in the vertical direction, and a pair of end plates 104 and 106 arranged so as to sandwich the plurality of power generation units 102 from above and below. The number of power generation units 102 included in the fuel cell stack 100 shown in each drawing is merely an example, and the number of power generation units 102 is appropriately determined according to the output voltage required for the fuel cell stack 100 or the like.

  A plurality of (eight in this embodiment) through-holes 108 that penetrate the fuel cell stack 100 in the vertical direction are formed in the peripheral portion of the fuel cell stack 100. Each layer (a plurality of power generation units 102 and a pair of end plates 104 and 106) constituting the fuel cell stack 100 is fastened and fixed by bolts 22 inserted into the through holes 108 and nuts 24 fitted to the bolts 22. Has been.

  Since the outer diameter of the shaft portion of each bolt 22 is smaller than the inner diameter of each through hole 108, a space is secured between the outer peripheral surface of the shaft portion of each bolt 22 and the inner peripheral surface of each through hole 108. The space formed by the through hole 108 located near the midpoint of one side of the outer periphery of the fuel cell stack 100 functions as an oxidant gas supply manifold 162 that supplies the oxidant gas OG to each power generation unit 102. A space formed by the through hole 108 located near the midpoint of the side opposite to the side is an oxidant gas discharge manifold 164 that discharges the oxidant off-gas OOG that is an unreacted oxidant gas OG from each power generation unit 102. Function as.

  Further, the space formed by the through hole 108 located near the midpoint of the other side of the outer periphery of the fuel cell stack 100 functions as a fuel gas supply manifold 172 that supplies the fuel gas FG to each power generation unit 102, and The space formed by the through-hole 108 located near the midpoint of the side opposite to the side discharges the fuel off-gas FOG containing unreacted fuel gas FG and fuel gas FG after power generation from each power generation unit 102. Functions as a fuel gas discharge manifold 174. In the present embodiment, for example, air is used as the oxidant gas OG, and, for example, a hydrogen-rich gas obtained by reforming city gas is used as the fuel gas FG.

(Configuration of end plates 104 and 106)
The pair of end plates 104 and 106 are rectangular flat plate-like conductive members, and are made of, for example, stainless steel. One end plate 104 is disposed on the upper side of the power generation unit 102 located on the uppermost side, and the other end plate 106 is disposed on the lower side of the power generation unit 102 located on the lowermost side. That is, the plurality of power generation units 102 are sandwiched between the pair of end plates 104 and 106 while being pressed. The upper end plate 104 (or another member connected to the upper end plate 104) functions as a positive output terminal of the fuel cell stack 100, and is connected to the lower end plate 106 (or the lower end plate 106). The connected separate member) functions as a negative output terminal of the fuel cell stack 100.

(Configuration of power generation unit 102)
3 and 4 are explanatory diagrams schematically showing the configuration of the power generation unit 102. FIG. 3 shows a cross-sectional configuration of the power generation unit 102 at the position III-III in FIG. 2, and FIG. 4 shows a cross-sectional configuration of the power generation unit 102 at the position IV-IV in FIG. Yes. In addition, the code | symbol OG of FIG. 3 means oxidizing agent gas, and the code | symbol OOG means oxidizing agent off gas. The sign FG in FIG. 4 means fuel gas, and the sign OFG means fuel off-gas.

  As shown in FIGS. 3 and 4, the power generation unit 102, which is the minimum unit of power generation, includes a single cell 110, a separator 120, an air electrode side current collector 134, an air electrode side frame 130, and a fuel electrode side current collector. An electric body 144, a fuel electrode side frame 140, and a pair of interconnectors 150 constituting the uppermost layer and the lowermost layer of the power generation unit 102 are provided. In the peripheral portions of the separator 120, the air electrode side frame 130, the fuel electrode side frame 140, and the interconnector 150, holes corresponding to the through holes 108 into which the bolts 22 are inserted are formed.

  The interconnector 150 is a rectangular flat conductive member, and is formed of, for example, stainless steel. The interconnector 150 ensures electrical continuity between the power generation units 102 and prevents reaction gas from being mixed between the power generation units 102. One interconnector 150 is shared by two power generation units 102. That is, the upper interconnector 150 in a power generation unit 102 is the same member as the lower interconnector 150 in another power generation unit 102 adjacent to the upper side of the power generation unit 102. Further, since the fuel cell stack 100 includes a pair of end plates 104 and 106, the upper interconnector 150 in the uppermost power generation unit 102 in the fuel cell stack 100 and the lowermost power generation unit 102. The lower interconnector 150 can be omitted.

  The unit cell 110 includes an electrolyte layer 112, an air electrode (cathode) 114 disposed on one surface of the electrolyte layer 112, and a fuel electrode (anode) 116 disposed on the other surface of the electrolyte layer 112. The single cell 110 of the present embodiment is a fuel electrode-supported single cell that supports the electrolyte layer 112 and the air electrode 114 with the fuel electrode 116.

  The electrolyte layer 112 is a rectangular flat plate member, such as YSZ (yttria stabilized zirconia), ScSZ (scandia stabilized zirconia), SDC (samarium doped ceria), GDC (gadolinium doped ceria), perovskite oxide. It is formed with such a solid oxide. The air electrode 114 is a rectangular flat plate-shaped member smaller than the electrolyte layer 112. For example, the air electrode 114 is a perovskite oxide (for example, LSCF (lanthanum strontium cobalt iron oxide), LSM (lanthanum strontium manganese oxide), LNF (lanthanum nickel). Iron)), various precious metals, cermets of precious metals and ceramics, and the like. The fuel electrode 116 is a rectangular flat plate member having the same size as the electrolyte layer 112 when viewed in the XY plane. For example, Ni (nickel), a cermet made of Ni and ceramic particles, and a Ni-based alloy Etc. are formed. Thus, the single cell 110 of this embodiment is a solid oxide fuel cell (SOFC) using a solid oxide as an electrolyte.

  The separator 120 is a frame-like member in which a rectangular through-hole 121 is formed near the center, and is made of, for example, metal. The peripheral portion of the separator 120 around the through hole 121 is opposed to the peripheral edge portion of the surface of the electrolyte layer 112 on the air electrode 114 side. The separator 120 is bonded to the electrolyte layer 112 (single cell 110) by a bonding portion 124 formed of a brazing material (for example, Ag brazing) disposed in the facing portion. The separator 120 suppresses gas leakage from the one electrode side to the other electrode side in the peripheral portion of the single cell 110. The single cell 110 to which the separator 120 is bonded is also referred to as a single cell with a separator. A plurality of through-holes 122 that respectively constitute the plurality of through-holes 108 are formed around the through-hole 121 in the separator 120.

  The air electrode side frame 130 is a frame-like member in which a rectangular through hole 131 is formed near the center, and is formed of an insulator such as mica, for example. The air electrode side frame 130 is in contact with the peripheral edge portion of the surface of the separator 120 opposite to the side facing the electrolyte layer 112 and the peripheral edge portion of the surface of the interconnector 150 facing the air electrode 114. . The air electrode side frame 130 secures an oxidant gas flow path 166 between the air electrode 114 and the interconnector 150, and electrically isolates the pair of interconnectors 150 included in the power generation unit 102. Further, the air electrode side frame 130 has an oxidant gas supply communication hole 132 communicating the oxidant gas supply manifold 162 and the oxidant gas flow path 166, an oxidant gas flow path 166, and an oxidant gas discharge manifold 164. And an oxidant gas discharge communication hole 133 that communicates with each other.

  The fuel electrode side frame 140 is a frame-like member in which a rectangular through hole 141 is formed near the center, and is made of, for example, metal. The fuel electrode side frame 140 is in contact with the peripheral portion of the surface of the separator 120 facing the electrolyte layer 112 and the peripheral portion of the surface of the interconnector 150 facing the fuel electrode 116. In the present embodiment, the fuel electrode side frame 140 is welded to the separator 120 and the interconnector 150. A fuel gas flow path 176 is secured between the fuel electrode 116 and the interconnector 150 by the fuel electrode side frame 140. Further, the fuel electrode side frame 140 has a fuel gas supply communication hole 142 communicating with the fuel gas supply manifold 172 and the fuel gas flow path 176, and a fuel gas communicating with the fuel gas flow path 176 and the fuel gas discharge manifold 174. A discharge communication hole 143 is formed.

  The air electrode side current collector 134 is composed of a plurality of rectangular columnar conductive members arranged at a predetermined interval, and is formed of, for example, stainless steel. The air electrode side current collector 134 is brought into contact with the surface of the air electrode 114 opposite to the side facing the electrolyte layer 112 and the surface of the interconnector 150 facing the air electrode 114, whereby the air electrode 114 and the interconnector 150 are electrically connected. A space formed between the columnar members constituting the air electrode side current collector 134 functions as an oxidant gas flow path 166.

  The fuel electrode side current collector 144 includes an interconnector facing portion 146, a plurality of electrode facing portions 145, and a connecting portion 147 that connects each electrode facing portion 145 and the interconnector facing portion 146. Or nickel alloy, stainless steel or the like. Each electrode facing portion 145 contacts the surface of the fuel electrode 116 opposite to the side facing the electrolyte layer 112, and the interconnector facing portion 146 contacts the surface of the interconnector 150 facing the fuel electrode 116. To do. Therefore, the fuel electrode side current collector 144 electrically connects the fuel electrode 116 and the interconnector 150. A space formed between the electrode facing portions 145 of the fuel electrode side current collector 144 functions as a fuel gas flow path 176.

  In the present embodiment, a spacer 149 made of, for example, mica is disposed between the electrode facing portion 145 and the interconnector facing portion 146. Therefore, the fuel electrode side current collector 144 follows the deformation of the power generation unit 102 due to the temperature cycle or reaction gas pressure fluctuation, and the fuel electrode 116 and the interconnector 150 are electrically connected via the fuel electrode side current collector 144. Maintained well.

(Configuration of welding jig 200)
5 to 8 are explanatory views schematically showing the configuration of the welding jig 200. FIG. FIG. 5 shows an external configuration of the welding jig 200 viewed from the upper side, and FIG. 6 shows a configuration of the welding jig 200 viewed from the upper side. FIG. 7 shows the configuration of the welding jig 200 viewed from above with a second opposing member 270 described later removed, and FIG. 8 shows the welding jig 200 shown in FIG. , The cross-sectional configuration of the PX portion parallel to the cross-section at the position VIII-VIII is shown.

  The welding jig 200 is used, for example, for welding the peripheral portions of the separator 120 to which the single cell 110 is joined in advance by the joining portion 124 and the fuel electrode side frame 140. Hereinafter, the separator 120 to which the single cell 110 is joined by the joining portion 124 and the fuel electrode side frame 140 may be collectively referred to as a work W1. As shown in FIGS. 5 and 6, the welding jig 200 includes a base portion 210 having a placement surface 222 on which the workpiece W <b> 1 is disposed, and a facing portion 250 disposed to face the placement surface 222.

(Configuration of base unit 210)
The base part 210 includes a mounting member 220 and a fixing frame 230. The mounting member 220 is a rectangular flat plate-like member, and is formed of, for example, metal. A plurality of fixing holes 221 penetrating the mounting member 220 in the vertical direction are formed in the peripheral portion of the mounting member 220. Screws (not shown) inserted into the respective fixing holes 221 are fitted into screw holes (not shown) formed in the moving table 700 (see FIG. 1) described later, whereby the mounting member 220 is fixed to the moving table 700.

  As shown in FIG. 7, the fixing frame 230 is a frame-like member in which a through hole 231 is formed near the center, and is made of, for example, metal. The outer size of the fixing frame 230 is smaller than that of the mounting member 220. The opening shape of the through hole 231 of the fixing frame 230 is a square shape corresponding to the outer shape of the work W1, and the work W1 is accommodated in the through hole 231 of the fixing frame 230. The fixing frame 230 is disposed on the upper surface of the mounting member 220, and the periphery of the fixing frame 230 is fixed to the mounting member 220 via a plurality of screws 232. In addition, the area | region exposed from the through-hole 231 of the frame 230 for fixation among the upper surfaces of the mounting member 220 is the arrangement | positioning surface 222 (refer FIG. 8) where the workpiece | work W1 is arrange | positioned.

(Configuration of the facing portion 250)
The facing portion 250 includes a first facing member 260 and a second facing member 270. The first facing member 260 is a frame-like member in which a through hole 261 is formed in the vicinity of the center, and is made of, for example, metal. As shown in FIG. 8, in the first opposing member 260, the inner peripheral surface 262 constituting the through hole 261 (see FIG. 7) of the first opposing member 260 has a lower inner peripheral portion 262D and an upper inner peripheral portion 262U. And have. The lower inner peripheral portion 262D extends upward from the lower surface 260D of the first facing member 260. The upper inner peripheral portion 262U extends from the upper end of the lower inner peripheral portion 262D to the upper surface 260U of the first opposing member 260, and the outer peripheral surface of the first opposing member 260 approaches the upper surface 260U of the first opposing member 260. It is inclined to approach 263. The inner peripheral surface 262 is an example of a first inner wall surface, and the outer peripheral surface 263 is an example of an outer wall surface.

  As shown in FIG. 5, a plurality of fixing holes 265 penetrating the first opposing member 260 in the vertical direction are formed in the peripheral portion of the first opposing member 260. The first facing member 260 is disposed on the upper surface of the fixing frame 230 in which the workpiece W1 is accommodated in the through hole 231 of the fixing frame 230, and a screw 266 inserted into each fixing hole 265 is formed in the fixing frame 230. The first opposing member 260 is fixed to the fixing frame 230 by being fitted into the screw hole (not shown). At this time, as shown in FIG. 7, the outer peripheral surface 263 of the first opposing member 260 is located outside the outer peripheral surface W1A of the workpiece W1, and the inner peripheral surface 262 of the first opposing member 260 is the workpiece W1. It is located inside the outer peripheral surface W1A. Therefore, the workpiece W1 is fixed to the base portion 210 by the peripheral portion of the workpiece W1 being sandwiched between the placement member 220 and the first opposing member 260. In the through hole 261 of the first facing member 260, the portion of the separator 120 where the through hole 122 of the separator 120 is formed, the electrolyte layer 112, and the air electrode 114 are exposed.

  As shown in FIG. 6, a suction hole 300 is formed inside the first facing member 260. The suction hole 300 includes an annular suction hole 310, a plurality of first branch suction holes 320, and a second branch suction hole 330. The annular suction hole 310 extends in an annular shape so as to surround the periphery of the through hole 261 of the first opposing member 260. Each first branch suction hole 320 branches from the annular suction hole 310 and extends to the inner peripheral surface 262 of the first opposing member 260, and the tip thereof constitutes a suction port 321 formed in the inner peripheral surface 262. ing. In the present embodiment, seven suction ports 321 (first branch) are formed in each of the four portions corresponding to the four sides on the inner periphery of the first opposing member 260 in the inner peripheral surface 262 of the first opposing member 260. A suction hole 320) is formed. As shown in FIG. 8, each suction port 321 is formed in the lower inner peripheral portion 262D of the inner peripheral surface 262.

  The second branch suction hole 330 branches from the annular suction hole 310 and extends to the outer peripheral surface 263 of the first opposing member 260, and the tip thereof constitutes a suction side communication port 331 formed in the outer peripheral surface 263. Yes. A tubular communication portion 264 that communicates with the suction side communication port 331 is provided on the outer peripheral surface 263 of the first facing member 260.

  As shown in FIGS. 5 and 6, the second facing member 270 is a rectangular flat plate-like member, and is formed of, for example, metal. As shown in FIG. 8, the outer peripheral surface 272 of the second facing member 270 has a lower outer peripheral portion 272D and an upper outer peripheral portion 272U. The lower outer peripheral portion 272D extends upward from the lower surface 270D of the second facing member 270. The upper outer peripheral portion 272U extends from the upper end of the lower outer peripheral portion 272D to the upper surface 270U of the second opposing member 270, and approaches the central portion of the second opposing member 270 as it approaches the upper surface 270U of the second opposing member 270. So as to be inclined. The outer peripheral surface 272 is an example of a second inner wall surface. The lower inner peripheral portion 262D and the lower outer peripheral portion 272D are examples of a first inner wall portion, and the upper inner peripheral portion 262U and the upper outer peripheral portion 272U are examples of a second inner wall portion.

  The external size of the second opposing member 270 is smaller than the through hole 261 of the first opposing member 260. The second facing member 270 is disposed in the through hole 261 of the first facing member 260 in a state where the workpiece W1 is fixed to the base portion 210 by the first facing member 260. At this time, the inner peripheral surface 262 of the first opposing member 260 and the outer peripheral surface 272 of the second opposing member 270 are separated over the entire circumference. Accordingly, as shown in FIG. 6, the inner peripheral surface 262 of the first opposing member 260 and the outer peripheral surface 272 of the second opposing member 270 penetrate from the upper surface to the lower surface of the opposing portion 250, and the second opposing member 270. An annular opening 251 is formed extending so as to surround the entire circumference. As shown in FIG. 8, the upward opening angle formed by the upper inner peripheral portion 262U of the first opposing member 260 and the upper outer peripheral portion 272U of the second opposing member 270 is the lower inner peripheral portion of the first opposing member 260. It is wider than the upward opening angle formed by 262D and the lower outer peripheral portion 272D of the second opposing member 270.

  A plurality of fixing holes 271 penetrating the second opposing member 270 in the vertical direction are formed in the peripheral edge portion of the second opposing member 270. Each fixing hole 271 is disposed at a position corresponding to each of the plurality of through holes 122 formed in the separator 120. Screws 273 inserted into the respective fixing holes 271 are fitted into screw holes (not shown) formed in the mounting member 220 through the respective through holes 122 of the separator 120, whereby the second opposing member 270 is mounted on the mounting member. 220 is fixed.

  A supply hole 400 is formed in the second opposing member 270. As shown in FIG. 6, the supply hole 400 includes an annular supply hole 410, a plurality of first branch supply holes 420, and a second branch supply hole 430. The annular supply hole 410 extends annularly along the outer peripheral surface 272 of the second facing member 270. Each first branch supply hole 420 branches from the annular supply hole 410 and extends to the outer peripheral surface 272 of the second opposing member 270, and the tip thereof constitutes a supply port 421 formed in the outer peripheral surface 272. . In the present embodiment, seven supply ports 421 (first branch supply holes) are provided in each of the four portions corresponding to the four sides on the outer periphery of the second opposing member 270 in the outer peripheral surface 272 of the second opposing member 270. 420) is formed. As shown in FIG. 8, each supply port 421 is formed in the lower outer peripheral portion 272 </ b> D of the outer peripheral surface 272. Each suction port 321 and each supply port 421 are opposed to each other.

  The second branch supply hole 430 branches upward from the annular supply hole 410 and extends to the upper surface 270U of the second facing member 270, and the tip of the second branch supply hole 430 constitutes a supply-side communication port 431 formed in the upper surface 270U. Yes. A tubular communication portion 275 that communicates with the supply side communication port 431 is provided on the upper surface 270U of the second facing member 270. Note that a grip 276 is fixed to the upper surface 270U by a screw 277 near the center of the upper surface 270U of the second facing member 270.

(Configuration of suction device 30 and supply device 40)
As shown in FIG. 1, the suction device 30 includes a suction source 31 and a suction rod 32. The suction source 31 is a device having a configuration for sucking gas from the outside, and is, for example, a vacuum pump. The suction source 31 is connected to the communication portion 264 of the first facing member 260 via the suction rod 32. Therefore, the suction source 31 can suck the gas in and around the opening 251 of the facing portion 250 (hereinafter referred to as suction gas AG2) through the suction hole 300 of the first facing member 260. The supply device 40 includes a supply source 41 and a supply rod 42. The supply source 41 is a device having a configuration for supplying gas (hereinafter referred to as supply gas AG1) to the outside, and is, for example, an injection pump. The supply source 41 is connected to the communication portion 275 of the second facing member 270 via the supply rod 42. For this reason, the supply source 41 can supply the supply gas AG <b> 1 to the opening 251 of the facing portion 250 via the supply hole 400 of the second facing member 270. In the present embodiment, the supply gas AG1 may be air or an assist gas (nonvolatile gas such as argon gas).

(Configuration of suction valve 500 and supply valve 600)
The suction valve 500 is arranged in the middle of the suction rod 32 and can be switched between an open state in which the flow path of the suction gas AG2 in the suction rod 32 is opened and a closed state in which the flow path of the suction gas AG2 is closed. It is configured. Supply valve 600 is arranged in the middle of supply rod 42, and can be switched between an open state in which the flow path of supply gas AG1 in supply rod 42 is opened and a closed state in which the flow path of supply gas AG1 is closed. It is configured.

(Configuration of the movement table 700)
The moving table 700 is configured such that the placement surface 701 on which the welding jig 200 is placed can be moved to an arbitrary position on a horizontal plane.

(Configuration of control unit 800)
The control unit 800 controls each device of the welding system 1. Specifically, the control unit 800 can cause the laser output machine 10 to execute or stop the output of the laser beam L. The control unit 800 switches the suction valve 500 and the supply valve 600 between an open state and a closed state, and moves the moving table 700 to an arbitrary position. Control unit 800 accepts a welding start instruction via an input unit (not shown).

A-2. Operation of welding system 1:
FIG. 9 is a time chart showing operations of the laser output machine 10, the suction valve 500, and the supply valve 600. Before the control unit 800 accepts the welding start instruction, the laser output machine 10 stops the output of the laser beam L, and the suction valve 500 and the supply valve 600 are closed. When receiving the welding start instruction, the control unit 800 switches the suction valve 500 from the closed state (“CLOSE” in FIG. 9) to the open state (“OPEN” in FIG. 9) (timing T1 in FIG. 9). When the suction valve 500 is switched to the open state, the gas in the opening 251 and the surrounding area of the facing portion 250 is sucked into the suction hole 300 from the suction port 321 by the suction force of the suction device 30.

  The controller 800 switches the supply valve 600 from the closed state to the open state after the suction valve 500 is switched to the open state (timing T2 in FIG. 9). When the supply valve 600 is switched to the open state, the supply gas AG1 is supplied to the opening 251 of the facing portion 250 by the supply force of the supply device 40.

  After the supply valve 600 is switched to the open state, the controller 800 causes the laser output machine 10 to start outputting the laser beam L (timing T3 in FIG. 9), and the laser beam L is transmitted through the opening 251 to the workpiece W1. The moving table 700 is moved so as to be irradiated along the welding target portion. Thereby, the welding object location of the workpiece | work W1 is welded.

  When the workpiece W1 is welded, spatter and welding fume (hereinafter referred to as “spatter” or the like) may be generated from the welding target portion of the workpiece W1. However, as described above, when the workpiece W1 is welded, the supply gas AG1 is supplied from the supply hole 400 to the opening 251 and the gas in and around the opening 251 is sucked into the suction hole 300. ing. That is, as shown in FIG. 8, the spatter generated from the workpiece W1 (symbol SP) is attracted to the air flow of the supply gas AG1, and is sucked into the suction hole 300 together with the supply gas AG1, so Adhering to is suppressed.

  When the laser output machine 10 finishes welding the entire circumference of the welding target portion of the workpiece W1, the control unit 800 causes the laser output machine 10 to stop outputting the laser beam L (timing T4 in FIG. 9) and the moving table 700. The movement operation of is stopped. Thereafter, the control unit 800 switches the supply valve 600 from the open state to the closed state (timing T5 in FIG. 9). Thereby, the supply gas AG1 is not supplied to the opening 251 of the facing portion 250. After the supply valve 600 is switched to the closed state, the control unit 800 switches the suction valve 500 from the open state to the closed state (timing T6 in FIG. 9). As a result, the gas or the like in the opening 251 of the facing portion 250 is not sucked into the suction hole 300.

A-3. Effects of this embodiment:
When the workpiece W1 arranged on the arrangement surface 222 of the base portion 210 is welded through the opening 251 of the facing portion 250, spatter or the like may occur from the workpiece W1. According to the present embodiment, the generated sputtering or the like is sucked into the suction device 30 through the suction hole 300 from the suction port 321 formed in the opening 251. Accordingly, it is possible to suppress spatter generated by welding from adhering to the workpiece W1.

  The suction port 321 is formed in the lower inner peripheral portion 262D of the inner peripheral surface 262 of the first opposing member 260. For this reason, compared with the case where the suction port 321 is formed in the upper inner peripheral portion 262U, it is possible to more reliably suppress spatter and the like from adhering to the work W1 by sucking spatter and the like at a position close to the work W1. can do. The suction port 321 is formed in a lower inner peripheral portion 262D having a relatively small opening angle to the upper surface side of the facing portion 250 among the inner wall surfaces constituting the opening 251. For this reason, compared with the case where the suction port 321 is formed in the upper inner peripheral portion 262U where the opening angle to the upper surface side of the facing portion 250 is relatively large, spatter and the like are scattered from the opening 251 to the outside. It can suppress adhering to a workpiece | work.

  A suction port 321 and a supply port 421 are formed on the inner peripheral surface 262 of the first counter member 260 and the outer peripheral surface 272 of the second counter member 270 that face each other. For this reason, by forming a smooth air flow path from the supply port 421 to the suction port 321, spatter generated by welding can be smoothly sucked into the suction port 321, whereby the sputter or the like is transferred to the workpiece W <b> 1. It can suppress more reliably that it adheres to.

  The supply port 421 is formed in the lower outer peripheral portion 272 </ b> D of the outer peripheral surface 272 of the second facing member 270. For this reason, compared with the case where the supply port 421 is formed in the upper outer peripheral portion 272U, the supply gas AG1 is supplied at a position close to the workpiece W1, thereby more reliably preventing spatter and the like from adhering to the workpiece W1. Can be suppressed. The supply port 421 is formed in the lower outer peripheral portion 272 </ b> D having a relatively small opening angle toward the upper surface side of the facing portion 250 among the inner wall surfaces constituting the opening 251. For this reason, compared with the case where the supply port 421 is formed in the upper outer peripheral portion 272U where the opening angle to the upper surface side of the facing portion 250 is relatively large, spatter and the like are scattered from the opening 251 to the outside. It can suppress adhering to.

  When the control of the control unit 800 is started, the supply valve 600 is switched from the closed state to the open state after the suction valve 500 is switched to the open state (timing T2 in FIG. 9). For this reason, compared with the case where the suction valve 500 is switched from the closed state to the open state after the supply valve 600 is switched from the closed state to the open state, spatter or the like is generated in the opening 251 when welding of the workpiece W1 is started. It is possible to suppress scattering to the outside and adhering to the workpiece W1.

  After the supply valve 600 is switched to the closed state, the suction valve 500 is switched from the open state to the closed state (timing T6 in FIG. 9). For this reason, it can suppress that a sputter | spatter etc. adhere to the workpiece | work W1 compared with the case where the supply valve 600 switches from an open state to a closed state after the suction valve 500 switches from an open state to a closed state.

B. Second embodiment:
FIG. 10 shows an external configuration of the welding jig 200A according to the second embodiment as viewed obliquely from above. The welding jig 200A includes a base portion 210A having a placement surface 222A on which the workpiece W2 is disposed, and a facing portion 250A disposed to face the placement surface 222A. The base part 210A is a rectangular flat plate-like member, and is formed of, for example, metal.

  The facing portion 250A is a rectangular flat plate-like member, and is formed of, for example, metal. The facing portion 250A is formed with a pair of openings 251A that penetrates the facing portion 250A vertically. Each opening 251A has a rectangular opening cross section extending in a direction parallel to a pair of opposite sides on the outer periphery of the facing portion 250A.

  A suction hole 300A and a supply hole 400A are formed inside the facing part 250A. The suction hole 300A includes a main suction hole 310A and a plurality of branch suction holes 320A. 310 A of main suction holes are arrange | positioned between a pair of opening part 251A, and are extended in the direction parallel to each opening part 251A. One end of the main suction hole 310A is closed, and the other end constitutes a suction side communication port 331A formed on the outer peripheral surface 263A of the facing portion 250A. The outer peripheral surface 263A is provided with a tubular communication portion 264A that communicates with the suction side communication port 331A.

  Each branch suction hole 320A branches from the main suction hole 310A and extends to the inner first inner wall surface 252 constituting each opening 251A, and the tip of the branch suction hole 320A is formed in the first inner wall surface 252. 321A is configured. In the present embodiment, four suction ports 321A (branch suction holes 320A) are formed in each first inner wall surface 252.

  The supply hole 400A includes a main supply 410A, a pair of first branch supply holes 420A, and a plurality of second branch supply holes 430A. The main supply 410A is disposed between a surface on the opposite side of the outer peripheral surface 263A of the facing portion 250A from the surface on which the suction side communication port 331A is formed, and the pair of openings 251A. Extends in a direction parallel to One end of the main supply 410A constitutes a supply side communication port 431A formed on the outer peripheral surface 263A of the facing portion 250A. The outer peripheral surface 263A is provided with a tubular communication portion 275A that communicates with the supply side communication port 431A.

  The pair of first branch supply holes 420A is disposed outside the pair of openings 251A and extends in a direction parallel to each opening 251A. Each first branch supply hole 420A has one end closed and the other end communicating with the main supply 410A. Each of the second branch supply holes 430A branches from the first branch supply hole 420A and extends to the outer second inner wall surface 253 constituting each opening 251A, and the tip thereof is formed in the second inner wall surface 253. The supply port 421A is configured. In the present embodiment, four supply ports 421A (second branch supply holes 430A) are formed on each second inner wall surface 253. The suction port 321A and the supply port 421A are arranged at positions facing each other.

  When the workpiece W2 arranged on the arrangement surface 222A of the base portion 210A is welded through the opening 251A of the facing portion 250A, spatter or the like may occur from the workpiece W2. At this time, by connecting a suction device (not shown) to the communication portion 264A, the gas (AG2) in and around the opening 251A of the facing portion 250A can be sucked through the suction hole 300A. By connecting a supply device (not shown) to the communication portion 275A, gas (AG1) can be supplied to the opening 251A through the supply hole 400A. Thereby, it can suppress that the sputter | spatter etc. which generate | occur | produced by welding adhere to the workpiece | work W2.

C. Variations:
The technology disclosed in the present specification is not limited to the above-described embodiment, and can be modified into various forms without departing from the gist thereof. For example, the following modifications are possible.

  In the said embodiment, although the welding apparatus 20 was used when performing laser beam welding, you may use when performing other types of welding, such as arc welding and electron beam welding.

  The workpiece to be welded by the welding apparatus 20 is not limited to the separator 120 and the fuel electrode side frame 140 but may be other components of the fuel cell stack 100 such as the fuel electrode side frame 140 and the interconnector 150, for example. The workpiece may be a component of a fuel cell other than the solid oxide type, or may be a component of an apparatus other than the fuel cell.

  The number and opening area of the suction ports 321 and the inner diameter and length of the suction holes 300 can be appropriately determined depending on the amount of spatter generated and the suction force of the suction source 31. The number and opening area of the supply ports 421 and the inner diameter and length of the supply holes 400 can be determined as appropriate depending on the amount of spatter generated and the supply force of the supply source 41.

  In the above-described embodiment, the inner wall surface constituting the opening 251 of the facing portion 250 has an upper portion whose upward opening angle is larger than that of the lower portion. The opening angle upward from the portion may be smaller. In this case, the suction port 321 and the supply port 421 may be formed in either the upper part or the lower part. The suction port 321 and the supply port 421 may not face each other. Only the suction port 321 is formed in the opening 251 of the facing portion 250, and the supply port 421 may not be formed.

  In the above embodiment, the inner wall surface constituting the opening portion 251 of the facing portion 250 is composed of surfaces whose opening angles are different from each other, but the inner wall surface constituting the opening portion of the facing portion is one plane. It may be comprised. In the present specification, A and B are opposed to each other, and it does not require that A and B are adjacent to each other, and includes a form in which a workpiece, other components, or the like are interposed between A and B. .

  In the first embodiment, the opening 251 is formed by the two members 260 and 270, and in the second embodiment, the opening 251A is formed by the one member 250A. The opening may be formed by the above members.

1: Welding system 10: Laser output machine 20: Welding device 22: Bolt 24: Nut 30: Suction device 31: Suction source 32: Suction source 40: Supply device 41: Supply source 42: Supply source 100: Fuel cell stack 102: Power generation unit 104, 106: End plate 108: Through hole 110: Single cell 112: Electrolyte layer 114: Air electrode 116: Fuel electrode 120: Separator 121: Through hole 122: Through hole 124: Junction 130: Air electrode side frame 131 : Through hole 132: Oxidant gas supply communication hole 133: Oxidant gas discharge communication hole 134: Air electrode side current collector 140: Fuel electrode side frame 141: Through hole 142: Fuel gas supply communication hole 143: Fuel gas discharge communication Hole 144: Fuel electrode side current collector 145: Electrode facing portion 146: Interconnector Direction part 147: Connecting part 149: Spacer 150: Interconnector 162: Oxidant gas supply manifold 164: Oxidant gas discharge manifold 166: Oxidant gas flow path 172: Fuel gas supply manifold 174: Fuel gas discharge manifold 176: Fuel Gas flow path 200: Welding jig 200A: Welding jig 210: Base part 210A: Base part 220: Mounting member 221: Fixing hole 222: Arrangement surface 222A: Arrangement surface 230: Fixing frame 231: Through hole 232 : Screw 250: Opposing part 250A: Opposing part 251: Opening part 251A: Opening part 252: First inner wall surface 253: Second inner wall surface 260: First opposing member 260D: Lower surface 260U: Upper surface 261: Through hole 262: Inner circumference Surface 262D: Lower inner peripheral portion 262U: Upper inner peripheral portion 263: outer peripheral surface 263A: outer peripheral surface 264: communication portion 264A: communication portion 265: fixing hole 266: screw 270: second opposing member 270D: lower surface 270U: upper surface 271: fixing hole 272: outer peripheral surface 272D: lower Side outer peripheral portion 272U: Upper outer peripheral portion 273: Screw 275: Communication portion 275A: Communication portion 276: Holding portion 277: Screw 300: Suction hole 300A: Suction hole 310: Annular suction hole 310A: Main suction hole 320: First branch suction Hole 320A: Branch suction hole 321: Suction port 321A: Suction port 330: Second branch suction hole 331: Suction side communication port 331A: Suction side communication port 400: Supply hole 400A: Supply hole 410: Annular supply hole 410A: Main supply 420: First branch supply hole 420A: First branch supply hole 421: Supply 421A: supply port 430: second branch supply hole 430A: second branch supply hole 431: supply side communication port 431A: supply side communication port 500: suction valve 600: supply valve 700: moving table 701: mounting surface 800: control Part AG1: Supply gas AG2: Suction gas FG: Symbol L: Laser beam OFG: Symbol OG: Symbol OOG: Symbol SP: Symbol T1: Timing T2: Timing T3: Timing T4: Timing T5: Timing T6: Timing W1: Work W1A : Outer peripheral surface W2: Workpiece W: Workpiece

Claims (9)

A base portion having an arrangement surface on which a workpiece to be welded is arranged;
A facing portion arranged to face the placement surface of the base portion, and a second surface of the outer wall surface opposite to the first surface from the first surface facing the base portion. In a welding jig comprising a facing portion formed with an opening that penetrates to
A suction hole is formed inside the facing portion, and one end of the suction hole constitutes a suction port formed on the inner wall surface of the facing portion that constitutes the opening, and the other of the suction holes. An end is formed on the outer wall surface of the facing portion, and constitutes a suction side communication port capable of communicating with a suction device. The welding jig according to claim 1,
The suction jig is formed at a position closer to the first surface than the second surface in the inner wall surface of the facing portion. In the welding jig according to claim 1 or 2,
The inner wall surface of the opening has a first inner wall portion and a second inner wall portion having an opening angle toward the second surface side larger than the first inner wall portion,
The welding jig, wherein the suction port is formed in the first inner wall portion. In the welding jig according to any one of claims 1 to 3,
The inner wall surface of the opening has a first inner wall surface and a second inner wall surface facing each other,
The suction port is formed in the first inner wall surface,
A supply hole is further formed inside the facing portion, and one end of the supply hole constitutes a supply port formed in the second inner wall surface of the opening, and the other end of the supply hole is A welding jig comprising a supply side communication port formed on the outer wall surface of the facing portion and capable of communicating with a supply device for supplying gas. The welding jig according to claim 4,
The welding jig, wherein the supply port is formed at a position closer to the first surface than the second surface in the inner wall surface of the facing portion. In the welding jig according to claim 4 or 5,
The inner wall surface of the opening is positioned closer to the second surface side than the first inner wall portion and the first inner wall portion, and an opening angle toward the second surface side is the first inner wall. A second inner wall portion that is larger than the portion;
The welding jig, wherein the supply port is formed in the first inner wall portion. A welding jig according to any one of claims 4 to 6,
A suction valve that switches between an open state that opens the flow path of the suction gas from the suction port to the suction device and a closed state that closes the flow path of the suction gas;
A supply valve that switches between an open state for opening a supply gas flow path from the supply device to the supply port and a closed state for closing the supply gas flow path;
A welding apparatus comprising: a control unit that controls switching between the opened state and the closed state of the suction valve and switching between the opened state and the closed state of the supply valve. The welding apparatus according to claim 7,
The controller is
When welding of the workpiece is started, the control is performed so that the suction valve is switched from the closed state to the open state before the supply valve is switched from the closed state to the open state. apparatus. The welding apparatus according to claim 7 or 8,
The controller is
When welding of the workpiece is finished, the supply valve is controlled to be switched from the open state to the closed state before the suction valve is switched from the open state to the closed state. apparatus.

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