JP6200311B2 - Torch, robot, arc processing system - Google Patents

Description

  The present invention relates to a torch, a robot, and an arc processing system.

  2. Description of the Related Art Conventionally, a method for performing arc processing such as welding on a member to be processed using an arc is known. Patent Document 1 discloses a two-electrode arc welding method in which welding is performed using two electrodes. In the method disclosed in this document, the base material is welded by feeding two electrodes (wires) from a nozzle. Conventionally, a technique capable of performing welding more appropriately has been developed.

JP 2008-55444 A

  The present invention has been conceived under the circumstances described above, and its main problem is to provide an arc processing torch capable of performing a more appropriate arc processing on a member to be processed. And

  According to the first aspect of the present invention, a first torch through which the first electrode is inserted, a second torch through which the second electrode is inserted, a rectifying member through which the first torch and the second torch are inserted, A nozzle having a nozzle inner surface and having a nozzle opening formed therein, wherein the nozzle inner surface is located on the first direction side of the first torch and the second torch in the first direction side relative to the rectifying member. The first direction is a direction from the rectifying member toward the nozzle opening, and the rectifying member has a gas inlet into which a shield gas flows and a shield that flows in from the gas inlet. A gas outflow port through which gas flows out is formed, and a shield gas that has flowed out of the gas outflow port is provided with a torch for arc treatment that travels along the inner surface of the nozzle toward the nozzle opening.

  Preferably, a rectifying air chamber is formed in the rectifying member, the rectifying air chamber communicates with the gas inlet and the gas outlet, and the rectifying member extends in the first direction side. A first air chamber surface facing and a second air chamber surface opposite to the first air chamber surface, wherein the rectifying air chambers are part of the first air chamber surface and the second air chamber. The gas inlet is located at a position overlapping the second air chamber surface when viewed in the first direction.

  Preferably, a gas circulation space partially defined by the rectifying member is formed, and the gas circulation space is located on a second direction side opposite to the first direction with respect to the rectifying member. The gas circulation space communicates with the gas inlet.

  Preferably, the gas outlet is formed at a peripheral end portion of the rectifying member, and a nozzle internal space defined by the inner surface of the nozzle is formed in the nozzle, and from the rectifying member to the nozzle The shield gas flowing out into the internal space is only the shield gas flowing out from the gas outlet.

  Preferably, the gas outlet has a plurality of gas outflow holes spaced apart in a circumferential direction around the first direction, and the plurality of gas outflow holes are each formed at a peripheral end portion of the rectifying member. Each of the plurality of gas outflow holes communicates with the rectifying air chamber.

  Preferably, the inner surface of the nozzle faces the rectifying air chamber.

  Preferably, the gas inlet is located at a position not overlapping the gas outlet as viewed in the first direction.

  Preferably, the rectifying member has a surface facing the first direction and made of a heat resistant material.

  Preferably, the heat resistant material is ceramic, resin, or metal.

  Preferably, a holding member that holds the first torch and the second torch is further provided, and the rectifying member is disposed on the first direction side of the holding member.

  Preferably, the first torch includes a first conductive portion made of a conductive material, the first conductive portion is in contact with the rectifying member, and the second torch is made of a first conductive material. The second conductive part is in contact with the rectifying member, the rectifying member includes an insulating part made of an insulating material, and the first conductive part and the second conductive part are insulated from each other. The parts are insulated from each other.

  Preferably, the rectifying member includes a first part and a second part, and the first part has two first recesses having a first inner surface having a semicircular cross-sectional shape, and The two parts are formed with two second recesses having a second inner surface having a semicircular cross-sectional shape, and one of the two first recesses and one of the two second recesses are One torch is surrounded, and the other of the two first recesses and the other of the two second recesses surround the second torch.

  Preferably, the first component and the second component are sandwiched between the first component and the second component. The first component further includes a gripping member, and the first component is formed with a first groove. The two parts are formed with a second groove, and the gripping member is fitted in the first groove and the second groove.

  According to a second aspect of the present invention, there is provided a robot comprising the torch provided by the first aspect of the present invention and a manipulator that holds the torch.

  According to a third aspect of the present invention, a robot provided by the second aspect of the present invention, a first power source for applying a voltage between the first electrode and the member to be processed, the second electrode, and the An arc processing system comprising: a second power source that applies a voltage between the workpieces.

  Other features and advantages of the present invention will become more apparent from the detailed description given below with reference to the accompanying drawings.

It is a figure which shows the arc processing system concerning 1st Embodiment of this invention. It is a front view of the torch in the arc processing system shown in FIG. It is sectional drawing of the torch shown in FIG. FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. FIG. 5 is a cross-sectional view showing the gas outlet in a perspective view in FIG. 4. FIG. 4 is a cross-sectional view taken along line VI-VI in FIG. 3 (the insides of the first torch and the second torch are omitted). It is sectional drawing which follows the VII-VII line of FIG. 3 (The inside of a 1st torch and a 2nd torch is abbreviate | omitted). It is a disassembled perspective view which decomposes | disassembles and shows the 1st component and 2nd component in a baffle member. It is sectional drawing which shows the torch in the arc processing system concerning 2nd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

<First Embodiment>
1st Embodiment of this invention is described using FIGS.

  FIG. 1 is a diagram showing an arc processing system according to a first embodiment of the present invention.

  The arc processing system A1 shown in the figure performs an arc processing on the member to be processed W1. In the present embodiment, the arc treatment is arc welding. The member to be processed W1 is made of metal.

  The arc processing system A1 shown in FIG. 1 includes a robot 1, a first power supply 31, and a second power supply 32.

  The robot 1 includes a manipulator 11 and an arc processing torch 12.

  The manipulator 11 is, for example, an articulated robot. When the manipulator 11 is driven, the torch 12 can freely move up and down, front, back, left and right.

  FIG. 2 is a front view of the torch in the arc processing system shown in FIG. 3 is a cross-sectional view of the torch shown in FIG.

  The torch 12 shown in FIGS. 1 to 3 includes a first torch 21, a second torch 22, a rectifying member 23, a gripping member 25 (see the enlarged view on the upper side in FIG. 3), a holding member 26, and a nozzle. 28.

  As shown in FIGS. 1 and 3, the first electrode 191 is inserted through the first torch 21. In the present embodiment, the first electrode 191 is a consumable electrode (that is, a wire). The first torch 21 guides the first electrode 191 that is a consumable electrode fed from a feeding device (not shown) to the member to be processed W1. A first insertion hole 211 and a first opening 213 are formed in the first torch 21. The first insertion hole 211 has a shape extending along the direction in which the first electrode 191 extends (in this embodiment, the feeding direction of the first electrode 191 as a consumable electrode). The first opening 213 communicates with the first insertion hole 211. The first electrode 191 is sent out from the first opening 213. As will be described later, the first torch 21 has a first conductive portion 215. The first conductive portion 215 is made of a conductive material.

  In the present embodiment, for example, the first torch 21 has the following configuration.

  As shown in FIG. 3, the first torch 21 includes a torch body 21A, a chip body 21B, and a chip 21D.

The torch body 21A has a cylindrical shape. The torch body 21A is made of a conductive material. The above-mentioned first insertion hole 211 is formed in the torch body 21A. The shield gas G1 flows through the first insertion hole 211 formed in the torch body 21A. The shield gas G1 is an inert gas. Examples of such an inert gas include Ar or a mixed gas of Ar and CO ₂ .

  The chip body 21B has a cylindrical shape. The chip body 21B is fixed to the torch body 21A. The chip body 21B is made of a conductive material. An example of the conductive material forming the chip body 21B is copper. The aforementioned first insertion hole 211 is formed in the chip body 21B. In the present embodiment, the chip body 21 </ b> B constitutes the first conductive portion 215 described above. Gas flow holes 21C are formed in the chip body 21B. The shield gas G1 flowing through the first insertion hole 211 formed by the torch body 21A flows out of the chip body 21B from the gas flow hole 21C.

  The chip 21D has a cylindrical shape. The chip 21D is fixed to the chip body 21B. The chip 21D is made of a conductive material. Examples of the conductive material constituting the chip 21D include a sintered material having a high hardness such as copper tungsten, a copper alloy such as chrome copper and beryllium copper, and a conductive ceramic. The chip 21D contacts the first electrode 191 being fed. The chip 21 </ b> D supplies power to the first electrode 191 by making contact with the fed first electrode 191. The chip 21D is formed with the first insertion hole 211 and the first opening 213 described above.

  In addition, when using arc processing system A1, the 1st electrode 191 is sent out from the front-end | tip of chip | tip 21D. And it will be in the state where the 1st arc a1 occurred between the tip of the 1st electrode 191 sent out from tip 21D, and member to be processed W1.

  The second torch 22 shown in FIGS. 1 and 3 is arranged in parallel with the first torch 21. A second electrode 192 is inserted through the second torch 22. In the present embodiment, the second electrode 192 is a non-consumable electrode. A second insertion hole 221 and a second opening 223 are formed in the second torch 22. The second insertion hole 221 has a shape extending along the direction in which the second electrode 192 extends. The second opening 223 communicates with the second insertion hole 221. As will be described later, the second torch 22 has a second conductive portion 225. The second conductive portion 225 is made of a conductive material.

  In the present embodiment, for example, the second torch 22 has the following configuration.

  As shown in FIG. 3, the second torch 22 has a torch body unit 22A, a holding portion 22B, and a plasma chip 22C.

  The torch body unit 22A has a cylindrical shape. In the present embodiment, the torch body unit 22A is made of a conductive material. The above-described second insertion hole 221 is formed in the torch body unit 22A. In the present embodiment, the torch body unit 22A constitutes the second conductive portion 225 described above.

  The holding portion 22B is disposed in the torch body unit 22A. The holding portion 22B is fixed to the torch body unit 22A. The holding portion 22B is for holding the second electrode 192. Although detailed illustration is omitted, the holding portion 22B has a collet and a collet body. A second electrode 192 is inserted through the collet, and the collet body plays a role of fastening the collet to the second electrode 192 and fixing the second electrode 192 at a desired position.

  The plasma chip 22C has a cylindrical shape. The plasma chip 22C is fixed to the torch body unit 22A. The plasma chip 22C is formed with the second insertion hole 221 and the second opening 223 described above. The plasma gas G <b> 2 flows through the second insertion hole 221 and flows out of the second torch 22 from the second opening 223.

  The second electrode 192 is a rod-shaped conductor. The second electrode 192 is made of tungsten, for example. When the arc processing system A1 is used, the second arc a2 is generated between the second electrode 192 and the member to be processed W1.

  The holding member 26 shown in FIGS. 1 to 3 holds the first torch 21 and the second torch 22. In the present embodiment, the holding member 26 holds the first torch 21 and the second torch 22 in a state where the first torch 21 and the second torch 22 are inserted through the holding member 26. The holding member 26 is made of, for example, an insulating material, specifically made of resin. In the present embodiment, the holding member 26 holds the torch body 21A and the torch body unit 22A.

  The nozzle 28 shown in FIGS. 1 to 3 is fixed to the holding member 26. The nozzle 28 is cylindrical. The nozzle 28 surrounds the first torch 21 and the second torch 22. In the present embodiment, the nozzle 28 is made of a conductive material. Unlike the present embodiment, the nozzle 28 may be made of an insulating material such as ceramic.

  In the nozzle 28, a nozzle internal space 281 and a nozzle opening 284 are formed. The nozzle internal space 281 is formed inside the nozzle 28. A first torch 21 and a second torch 22 are arranged in the nozzle internal space 281. The nozzle opening 284 communicates with the nozzle internal space 281. The nozzle opening 284 is open downward in FIG. A direction from the rectifying member 23 toward the nozzle opening 284 is defined as a first direction X1. A direction opposite to the first direction X1 is defined as a second direction X2.

  The nozzle 28 has a tip 286. The tip 286 is located closest to the first direction X1 in the nozzle 28. The nozzle opening 284 described above is formed at the tip 286. When the arc processing system A1 is used, as shown in FIG. 3, the tip 286 is maintained in an inclined state with respect to the member to be processed W1 in a side view. This is to prevent spatter that may be generated when using the arc processing system A1 from adhering to the tip 286. The nozzle 28 has a nozzle inner surface 282. The nozzle inner surface 282 defines the nozzle inner space 281 described above. The nozzle inner side surface 282 surrounds a portion of the first torch 21 and the second torch 22 that is located closer to the first direction X1 than the rectifying member 23.

  4 is a cross-sectional view taken along the line IV-IV in FIG. 3 (the interiors of the first torch 21 and the second torch 22 are omitted). FIG. 5 is a cross-sectional view showing the gas outlet 232 in FIG. FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 3 (the interiors of the first torch 21 and the second torch 22 are omitted). FIG. 7 is a cross-sectional view taken along the line VII-VII in FIG. 3 (the interiors of the first torch 21 and the second torch 22 are omitted). FIG. 8 is an exploded perspective view showing the rectifying member 23 in an exploded manner.

  A first torch 21 and a second torch 22 are inserted through the rectifying member 23 shown in FIGS. 1 and 3 to 8. The rectifying member 23 is disposed on the first direction X1 side with respect to the holding member 26. As shown in FIGS. 1 and 3, the rectifying member 23 and the holding member 26 define a gas circulation space 29. That is, the rectifying member 23 defines a part of the gas circulation space 29. The gas circulation space 29 is located on the second direction X2 side opposite to the first direction X1 with respect to the rectifying member 23. The gas circulation space 29 is formed between the rectifying member 23 and the holding member 26. In the gas circulation space 29, the shield gas G1 in the first insertion hole 211 flows from the gas circulation hole 21C.

  In the present embodiment, the rectifying member 23 is in contact with the holding member 26. In the present embodiment, the entire rectifying member 23 is made of an insulating material. Examples of the insulating material constituting the rectifying member 23 include ceramic and insulating resin. Examples of such ceramics include alumina and zirconia. Examples of such an insulating resin include Vespel (registered trademark), polyimide, and polyamide. As shown in FIGS. 3 to 7, the rectifying member 23 is in contact with the first conductive portion 215 in the first torch 21 and the second conductive portion 225 in the second torch 22. In the present embodiment, since the entire rectifying member 23 is made of an insulating material, the rectifying member 23 insulates the first conductive portion 215 and the second conductive portion 225 from each other. That is, in the present embodiment, the entire rectifying member 23 corresponds to an example of the insulating portion of the present invention.

  As illustrated in FIGS. 3 to 8, the rectifying member 23 includes a first surface 235 </ b> A, a second surface 235 </ b> B, and a peripheral surface 235 </ b> C. The first surface 235A is a surface facing the first direction X1. The first surface 235A is a surface made of a heat resistant material. Specifically, the first surface 235 </ b> A is made of the material that forms the rectifying member 23. The second surface 235B is a surface located on the opposite side of the rectifying member 23 from the first surface 235A. The second surface 235 </ b> B defines a part of the gas circulation space 29. The peripheral surface 235C is in contact with the nozzle 28 (in this embodiment, the nozzle inner surface 282).

  As shown in FIGS. 3 to 8, the rectifying member 23 is formed with a gas inlet 231, a gas outlet 232, and a rectifying air chamber 237.

  The shield gas G <b> 1 flows into the gas inlet 231. In the present embodiment, the gas inlet 231 communicates with the gas circulation space 29. Therefore, the shield gas G <b> 1 in the gas circulation space 29 flows into the gas inlet 231. In the present embodiment, the gas inlet 231 is formed at the peripheral end of the rectifying member 23. The gas inflow port 231 has a plurality (six in this embodiment) of gas inflow holes 231A that are spaced apart in the circumferential direction around the first direction X1. Each of the plurality of gas inflow holes 231 </ b> A is formed at a peripheral end portion of the rectifying member 23. All of the plurality of gas inflow holes 231 </ b> A communicate with the gas circulation space 29.

  The gas inlet 231 is not necessarily formed at the peripheral end of the rectifying member 23. For example, unlike the present embodiment, the gas inlet 231 may be formed at the center of the rectifying member 23 as viewed in the first direction X1.

  The gas outlet 232 causes the shield gas G1 flowing from the gas inlet 231 to flow out. The shield gas G 1 flowing out from the gas outlet 232 goes toward the nozzle opening 284 along the nozzle inner surface 282. In the present embodiment, the gas outlet 232 communicates with the nozzle internal space 281. Therefore, the shield gas G <b> 1 flows out from the gas outlet 232 into the nozzle internal space 281. As clearly shown in FIGS. 5 to 8, in this embodiment, the gas outlet 232 is formed at the peripheral end of the rectifying member 23. The gas outlet 232 has a plurality (six in this embodiment) of gas outlets 232A that are spaced apart in the circumferential direction around the first direction X1. Each of the plurality of gas outflow holes 232 </ b> A is formed at a peripheral end portion of the rectifying member 23. All of the plurality of gas outflow holes 232 </ b> A communicate with the nozzle internal space 281. As shown in FIG. 5, the gas outlet 232 is located at a position that does not overlap with the gas inlet 231 when viewed in the first direction X1.

  The rectifying gas chamber 237 communicates with the gas inlet 231 and the gas outlet 232. Specifically, the rectifying air chamber 237 communicates with a plurality of gas inflow holes 231A at the gas inflow port 231 and a plurality of gas outflow holes 232A at the gas outflow port 232. As clearly shown in FIG. 8, in this embodiment, the rectifying air chamber 237 is configured as a concave portion recessed from the peripheral surface 235 </ b> C of the rectifying member 23. The recess is formed over the entire circumference of the peripheral surface 235C. As shown in FIG. 3, in this embodiment, a nozzle inner side surface 282 faces the rectifying air chamber 237.

  As shown in FIGS. 3 and 8, the flow regulating member 23 has a first air chamber surface 237A and a second air chamber surface 237B. The first air chamber surface 237A and the second air chamber surface 237B define a part of the rectifying air chamber 237. The first air chamber surface 237A faces the first direction X1. The gas outlet 232 (a plurality of gas outlets 232A in the present embodiment) is located at a position overlapping the first air chamber surface 237A when viewed in the first direction X1. The second air chamber surface 237B faces the first air chamber surface 237A. The gas inflow port 231 (a plurality of gas inflow holes 231A in the present embodiment) is located at a position overlapping the second air chamber surface 237B when viewed in the first direction X1.

  Unlike the present embodiment, the rectifying air chamber 237 is formed inside the rectifying member 23, and the nozzle inner surface 282 does not have to face the rectifying air chamber 237.

  In the present embodiment, the shield gas G <b> 1 in the gas circulation space 29 passes through the gas inlet 231 and reaches the rectifying air chamber 237. The shield gas G <b> 1 stays in the rectifying gas chamber 237 and then flows out from the gas outlet 232 to the nozzle internal space 281. The shield gas G1 in the nozzle internal space 281 is ejected from the nozzle opening 284 toward the processing target member W1. In the present embodiment, the shield gas G <b> 1 flowing out from the rectifying member 23 into the nozzle internal space 281 is only the shield gas flowing out from the gas outlet 232.

  As shown in FIG. 8, the rectifying member 23 includes a first part 238 and a second part 239.

  In the present embodiment, the first component 238 and the second component 239 are symmetrical, but the first component 238 and the second component 239 may not be symmetrical.

  The first component 238 constitutes a half of the first surface 235A, a half of the second surface 235B, and a half of the peripheral surface 235C. The first component 238 has two first recesses 238A. Each first recess 238A has a first inner surface 238B having a semicircular cross-sectional shape. A first groove 238 </ b> S is formed in the first component 238. Specifically, the first groove 238 </ b> S is formed on the peripheral surface 235 </ b> C that the first component 238 constitutes.

  The second component 239 constitutes the remaining half of the first surface 235A, the remaining half of the second surface 235B, and the remaining half of the peripheral surface 235C. The second component 239 is formed with two second recesses 239A. Each second recess 239A has a second inner surface 239B having a semicircular cross-sectional shape. A second groove 239S is formed in the second component 239. Specifically, the second groove 239 </ b> S is formed on the peripheral surface 235 </ b> C that the second component 239 constitutes.

  As shown in FIGS. 4 to 7, one of the two first recesses 238 </ b> A and one of the two second recesses 239 </ b> A surround the first torch 21. The other of the two first recesses 238 </ b> A and the other of the two second recesses 239 </ b> A surround the second torch 22.

  In the present embodiment, the rectifying member 23 includes the first component 238 and the second component 239 which are separate components. However, unlike the present embodiment, the rectifying member 23 may be a single component.

  The gripping member 25 shown in FIG. 3 sandwiches the first component 238 and the second component 239 and grips the first component 238 and the second component 239. The grip member 25 is a so-called metal clip. Although illustration is omitted, the gripping member 25 has, for example, a U shape. The grip member 25 is fitted in the first groove 238S and the second groove 239S.

  The first power supply 31 shown in FIG. 1 applies a voltage between the first electrode 191 and the member to be processed W1, and causes a current to flow between the first electrode 191 and the member to be processed W1. The second power supply 32 applies a voltage between the second electrode 192 and the member to be processed W1, and causes a current to flow between the second electrode 192 and the member to be processed W1.

  Next, the effect of this embodiment is demonstrated.

  In the present embodiment, the torch 12 includes a rectifying member 23. The rectifying member 23 is formed with a gas inlet 231 through which the shield gas G1 flows and a gas outlet 232 through which the shield gas G1 flowing from the gas inlet 231 flows out. The shield gas G 1 flowing out from the gas outlet 232 goes toward the nozzle opening 284 along the nozzle inner surface 282. According to such a configuration, the shield gas G1 flowing out from the gas outlet 232 can be made more laminar. Thereby, it becomes possible to improve the shielding performance of the first arc a1 and the second arc a2. As a result, a more appropriate arc process (arc welding in the present embodiment) can be performed on the member W1. For example, if the first arc a1 and the second arc a2 are generated in a space where the shield gas G1 is a laminar flow, there is little mixing of outside air, and blowholes are prevented from being generated due to mixing of outside air (mainly nitrogen in the air). be able to.

  Further, the shielding gas G1 flowing out from the gas outlet 232 shields both the first arc a1 and the second arc a2. Therefore, it is not necessary to separately shield the first arc a1 and the second arc a2 with the shielding gas. Therefore, the number of independent gas paths of the shield gas can be reduced, and piping work to the torch 12 is facilitated. The reduction in the number of gas paths also contributes to the reduction in the number of parts of the torch 12.

  By flowing the shield gas G <b> 1 along the nozzle inner side surface 282, exhaust heat of the nozzle 28 heated by radiant heat can be promoted, and the thermal effect of the tip 286 of the nozzle 28 can be suppressed.

  In the present embodiment, a rectifying air chamber 237 is formed in the rectifying member 23. The rectifying gas chamber 237 communicates with the gas inlet 231 and the gas outlet 232. The rectifying member 23 has a first air chamber surface 237A facing the first direction X1 and a second air chamber surface 237B facing the first air chamber surface 237A. A part of the rectifying air chamber 237 is defined by the first air chamber surface 237A and the second air chamber surface 237B. The gas inflow port 231 is located at a position overlapping the second air chamber surface 237B when viewed in the first direction X1. According to such a configuration, the shield gas G1 flowing into the gas inflow port 231 hits the second air chamber surface 237B and temporarily stops in the rectifying air chamber 237. As a result, the shield gas G1 can flow more uniformly along the nozzle inner side surface 282.

  In the present embodiment, the gas outlet 232 has a plurality of gas outlet holes 232A that are spaced apart in the circumferential direction around the first direction X1. Each of the plurality of gas outflow holes 232 </ b> A is formed at a peripheral end portion of the rectifying member 23. All of the plurality of gas outflow holes 232 </ b> A communicate with the rectifying air chamber 237. According to such a configuration, the shield gas G1 that has flowed into the gas inflow port 231 can flow out from the various gas outflow holes 232A via the rectifying air chamber 237. As a result, the shield gas G1 can flow more uniformly along the nozzle inner surface 282.

  In the present embodiment, the nozzle inner surface 282 faces the rectifying air chamber 237. According to such a configuration, the heat of the nozzle 28 can be transmitted to the shield gas G <b> 1 in the rectifying air chamber 237. Thereby, the exhaust heat effect of the nozzle 28 can be improved. As a result, the nozzle 28 can be prevented from being adversely affected by heat.

  In the present embodiment, the rectifying member 23 has a surface (first surface 235A) facing the first direction X1 and made of a heat resistant material. According to such a configuration, even when high-temperature spatter flies to the rectifying member 23 during arc processing on the member to be processed W1, damage to the rectifying member 23 itself can be prevented. Further, since the high-temperature spatter flying from the member to be processed W1 adheres to the rectifying member 23, it can be prevented from adhering to the holding member 26. Thereby, damage to the holding member 26 due to heat can be prevented.

  In the present embodiment, the first conductive portion 215 and the second conductive portion 225 are insulated from each other by an insulating portion (rectifying member 23 in the present embodiment). According to such a configuration, the first conductive portion 215 in the first torch 21 and the second conductive portion 225 in the second torch 22 can be prevented from conducting.

  In the present embodiment, the rectifying member 23 includes a first part 238 and a second part 239. The first component 238 has two first recesses 238A having a first inner surface 238B having a semicircular cross section. The second component 239 is formed with two second recesses 239A having a second inner surface 239B having a semicircular cross section. One of the two first recesses 238A and one of the two second recesses 239A surround the first torch 21. The other of the two first recesses 238 </ b> A and the other of the two second recesses 239 </ b> A surround the second torch 22. According to such a configuration, the rectifying member 23 is attached around the first torch 21 and the second torch 22 by sandwiching the first torch 21 and the second torch 22 between the first component 238 and the second component 239. Can do. This is suitable for facilitating the mounting of the flow regulating member 23.

  In the present embodiment, the torch 12 includes a gripping member 25 that sandwiches the first component 238 and the second component 239 and grips the first component 238 and the second component 239. According to such a configuration, it is possible to maintain a state in which the first component 238 and the second component 239 are fixed around the first torch 21 and the second torch 22. Thereby, the malfunction that the 1st component 238 and the 2nd component 239 fall from the 1st torch 21 and the 2nd torch 22 can be prevented. In particular, since a member made of ceramic is easily broken when dropped, this configuration of the present embodiment is particularly suitable when the rectifying member 23 is made of ceramic.

Second Embodiment
A second embodiment of the present invention will be described with reference to FIG.

  In the following description, the same or similar components as those described above will be denoted by the same reference numerals as those described above, and description thereof will be omitted as appropriate.

  FIG. 9 is a sectional view showing a torch in the arc processing system according to the second embodiment of the present invention.

  In this embodiment, compared with the above-mentioned embodiment, the structure of the rectifying member 23 is partially different. In the present embodiment, the rectifying member 23 includes an insulating part 233 and a conductive part 234. The insulating part 233 is located around the first torch 21 and the second torch 22. The insulating part 233 is made of an insulating material such as ceramic, and insulates the first conductive part 215 and the second conductive part 225 from each other. In the present embodiment, the insulating portion 233 has a cylindrical shape. The conductive portion 234 is a portion other than the insulating portion 233 in the rectifying member 23.

  Even with such a configuration, the same operational effects as those described in the first embodiment can be obtained.

  The present invention is not limited to the embodiment described above. The specific configuration of each part of the present invention can be changed in various ways.

  In the above description, an example in which arc welding is performed as arc processing has been shown, but the present invention is not limited to this. The arc treatment may be, for example, thermal spraying or fusing.

  In the above description, an example in which the first electrode 191 is a consumable electrode and the second electrode 192 is a non-consumable electrode has been described, but the present invention is not limited to this. For example, both the first electrode 191 and the second electrode 192 may be consumable electrodes, and both the first electrode 191 and the second electrode 192 may be non-consumable electrodes.

  In the above description, the first torch 21 includes the first conductive portion 215 that contacts the rectifying member 23, and the second torch 22 includes the second conductive portion 225 that contacts the rectifying member 23. The invention is not limited to this. For example, the torch body unit 22A in contact with the rectifying member 23 may be made of an insulating material such as ceramic. In this case, the entire rectifying member 23 can be formed of a conductive material.

1 Robot 11 Manipulator 12 Torch 191 First Electrode 192 Second Electrode 21 First Torch 211 First Insertion Hole 213 First Opening 215 First Conductive Part 21A Torch Body 21B Tip Body 21C Gas Flow Hole 21D Tip 22 Second Torch 221 First 2 insertion hole 223 2nd opening 225 2nd conductive part 22A torch body unit 22B holding part 22C plasma chip 23 rectification member 231 gas inflow port 231A gas inflow hole 232 gas outflow port 232A gas outflow hole 233 insulation part 234 conductive part 235A first Surface 235B Second surface 235C Peripheral surface 237 Rectification air chamber 237A First air chamber surface 237B Second air chamber surface 238 First component 238A First recess 238B First inner surface 238S First groove 239 Second component 239A Second recess 239B Second inner surface 239S Second groove 25 Member 26 Holding member 28 Nozzle 281 Nozzle internal space 282 Nozzle inner side surface 284 Nozzle opening 286 Tip 29 Gas flow space 31 First power supply 32 Second power supply A1 Arc treatment system a1 First arc a2 Second arc G1 Shielding gas G2 Plasma gas W1 Processed member X1 First direction X2 Second direction

Claims (15)

A first torch through which the first electrode is inserted;
A second torch through which the second electrode is inserted;
A rectifying member into which the first torch and the second torch are inserted;
A nozzle having a nozzle inner surface and having a nozzle opening formed thereon,
The nozzle inner surface surrounds a portion of the first torch and the second torch that is located closer to the first direction than the rectifying member, and the first direction opens from the rectifying member to the nozzle opening. The direction towards
The rectifying member is formed with a gas inlet through which shield gas flows and a gas outlet through which the shield gas that flows in from the gas inlet flows out,
An arc processing torch in which the shield gas flowing out from the gas outlet exits toward the nozzle opening along the inner surface of the nozzle. A rectifying air chamber is formed in the rectifying member,
The rectifying air chamber communicates with the gas inlet and the gas outlet,
The rectifying member has a first air chamber surface facing the first direction side, and a second air chamber surface facing the first air chamber surface,
A part of the rectifying air chamber is defined by the first air chamber surface and the second air chamber surface,
The torch according to claim 1, wherein the gas inlet is located at a position overlapping the second air chamber surface when viewed in the first direction. A gas circulation space partially defined by the rectifying member is formed,
The gas circulation space is located on the second direction side opposite to the first direction with respect to the rectifying member,
The torch according to claim 1, wherein the gas circulation space communicates with the gas inlet. The gas outlet is formed at a peripheral end of the rectifying member,
In the nozzle, a nozzle internal space defined by the nozzle inner surface is formed,
The torch according to any one of claims 1 to 3, wherein the shield gas flowing out from the flow regulating member into the nozzle internal space is only the shield gas flowing out from the gas outlet. The gas outlet has a plurality of gas outlet holes spaced apart in a circumferential direction around the first direction;
Each of the plurality of gas outflow holes is formed in a peripheral end portion of the rectifying member,
The torch according to claim 2, wherein each of the plurality of gas outflow holes communicates with the rectifying air chamber.   The torch according to claim 2, wherein the inner surface of the nozzle faces the rectifying air chamber.   The torch according to any one of claims 1 to 6, wherein the gas inflow port is located at a position not overlapping with the gas outflow port in the first direction view.   The torch according to any one of claims 1 to 7, wherein the rectifying member has a surface facing the first direction and made of a heat resistant material.   The torch according to claim 8, wherein the heat-resistant material is ceramic, resin, or metal. A holding member for holding the first torch and the second torch;
The torch according to any one of claims 1 to 9, wherein the rectifying member is disposed closer to the first direction than the holding member. The first torch includes a first conductive portion made of a conductive material, and the first conductive portion is in contact with the rectifying member,
The second torch includes a second conductive portion made of a conductive material, and the second conductive portion is in contact with the rectifying member,
The rectifying member includes an insulating portion made of an insulating material,
The torch according to any one of claims 1 to 10, wherein the first conductive portion and the second conductive portion are insulated from each other by the insulating portion. The rectifying member includes a first part and a second part,
The first component has two first recesses having a first inner surface with a semicircular cross-sectional shape,
The second part is formed with two second recesses having a second inner surface having a semicircular cross-sectional shape,
One of the two first recesses and one of the two second recesses surround the first torch,
The torch according to any one of claims 1 to 11, wherein the other of the two first recesses and the other of the two second recesses surround the second torch. A gripping member that sandwiches the first component and the second component and grips the first component and the second component;
A first groove is formed in the first part, a second groove is formed in the second part,
The torch according to claim 12, wherein the gripping member is fitted in the first groove and the second groove. A torch according to any one of claims 1 to 13,
And a manipulator that holds the torch. A robot according to claim 14,
A first power source for applying a voltage between the first electrode and the member to be processed;
An arc processing system comprising: a second power source that applies a voltage between the second electrode and the member to be processed.

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