Abstract: One object of the present invention is to provide a technique capable of counting the spatters by a simple method while suppressing costs, and the present invention provides a spatter counting method performed by a portable terminal device provided with an image capturing device comprising: an image capturing step of capturing a moving image of an area including spatters generated during welding: and a counting step of counting a number of the spatters captured in each still image constituting the moving image captured in the capturing step.

Abstract: The present invention relates to a welding torch including a mounting jig for mounting a wire-aiming guide which feeds a welding wire toward a molten pool of a work piece, wherein the mounting jig has a male screw that can be screwed into a female screw provided in a torch body, and is detachably mounted to the torch body; and a mounting jig. The present invention provides the welding torch with which a wire-aiming guide can be stably mounted and which can mount a highly versatile wire-aiming guide; and the mounting jig.

Abstract: According to the present invention, there is provided a wire aiming guide capable of further improving usability. The present invention provides a wire aiming guide (1) configured to guide a welding wire (W) and feed the welding wire from a tip side thereof while being attached to a welding torch including: a first guide member (2) and a second guide member (3) configured to guide the welding wire (W): and a connecting portion (5) rotatably connecting the first guide member (2) and the second guide member (3), wherein a direction of the welding wire (W) fed from a tip end side of the first guide member (2) is adjusted by bending the first guide member (2) with respect to the second guide member (3).

Abstract: The object of the present invention is to provide a welding apparatus and a plasma welding method capable of obtaining deep penetration while suppressing initial investment in a welding apparatus. The welding apparatus of the present invention includes a torch for plasma welding and a power supply device, wherein the power supply device is composed of a first welding power supply used for a TIG welding apparatus, in which a positive terminal is electrically connected with the insert chip and a negative terminal is electrically connected with the electrode, and a second welding power supply used for a TIG welding apparatus, in which a positive terminal is electrically connected with a material to be welded and a negative terminal is electrically connected with the electrode.

Abstract: An object of the present invention is to provide a welding system having a remote controller suitable for manually adjusting the feeding speed of a filler wire, the present invention provides a welding system including: a consumable electrode type or a non-consumable electrode type welding torch (20); a welding power supply device (40) which is configured to supply a welding current to the welding torch (20); a wire feeding device (30) which is configured to feed a filler wire (W) to the welding torch (20) or a filler guide (31) attached to the welding torch (20); a remote controller (50) which is configured to manually adjust a feeding speed of the filler wire (W); and a control device (60) which is configured to control the welding power supply device (40) and the wire feeding device (30), wherein the remote controller (50) has a sensor and is configured to output a signal corresponding to a load applied to the sensor (51) to the control device (60), and the control device (60) is configured to control the

Abstract: The shielding gas for MAG welding according to an embodiment is a shielding gas for MAG welding to perform narrow gap welding of a high Cr steel containing 8 wt % to 13 wt % of Cr with one layer-one pass by using a solid wire containing 8 wt % to 13 wt % of Cr, and the shielding gas for MAG welding comprises a ternary mixed gas of 5% by volume to 17% by volume of a carbon dioxide gas, 30% by volume to 80% by volume of a helium gas, and a balance of an argon gas.

Abstract: A non-transferred plasma arc system, which is provided with a non-transferred plasma torch (1) that is provided with a non-consumable electrode (101) as a negative electrode and an insert chip as a positive electrode, the insert chip being cooled by a circulated coolant (W) and the insert chip releasing a plasma arc onto a workpiece. The plasma arc torch (1) comprises a TIG welding torch (100) that is provided with the non-consumable electrode (101), whereby an arc is generated between the workpiece and said electrode (101), and a torch nozzle (105), which releases a shield gas toward an arc-generated weld pool of the workpiece. The plasma arc torch (1) is provided with an attachment (51) that is detachably attached to the TIG welding torch (100) while surrounding the periphery of the torch nozzle (105) and that functions as the insert chip, whereby a non-transferred plasma arc is inexpensively and easily used.

Abstract: An object of the present invention to provide a gas supply device, a gas supply device having a mixing function, a welding device, and a gas supply method, which can prevent rush flow of gas from the gas supply source in the initial stage of gas lead-out from a gas supply source, reduce the cost, and improve the maintenance; and the present invention provides a gas supply device including a gas supply source into which a gas is filled at a high pressure, a single-stage decompressor which is provided at a gas outlet of the gas supply source and which is configured to reduce pressure of a gas led out from the gas supply source to a predetermined pressure, a gas supply line having one end connected to the single-stage decompressor and the other end connected to a use destination of the gas, a solenoid valve provided in the gas supply line, and a flow regulating valve provided in the gas supply line located between the solenoid valve and the use destination.

Abstract: One object of the present invention is to provide a plasma welding method capable of performing plasma welding while restraining initial investment in a welding device, and the present invention provide a plasma welding method includes a pilot arc generation step in which a pilot arc is generated between the electrode and the insert chip by supplying a first pilot gas which is easily converted into a plasma state between the electrode and the insert chip while supplying a shield gas between the insert chip and the shield cap; and a first welding step in which, after the pilot arc generation step, a main arc is generated between the electrode and the workpiece by electrically disconnecting the plus terminal and the insert chip by the first selector switch while supplying the first pilot gas and the shield gas.

Abstract: According to the present invention, there is provided a wire aiming guide capable of further improving usability. The present invention provides a wire aiming guide (1) configured to guide a welding wire (W) and feed the welding wire from a tip side thereof while being attached to a welding torch including: a first guide member (2) and a second guide member (3) configured to guide the welding wire (W): and a connecting portion (5) rotatably connecting the first guide member (2) and the second guide member (3), wherein a direction of the welding wire (W) fed from a tip end side of the first guide member (2) is adjusted by bending the first guide member (2) with respect to the second guide member (3).

Abstract: The object of the present invention is to provide a welding apparatus and a plasma welding method capable of obtaining deep penetration while suppressing initial investment in a welding apparatus. The welding apparatus of the present invention includes a torch for plasma welding and a power supply device, wherein the power supply device is composed of a first welding power supply used for a TIG welding apparatus, in which a positive terminal is electrically connected with the insert chip and a negative terminal is electrically connected with the electrode, and a second welding power supply used for a TIG welding apparatus, in which a positive terminal is electrically connected with a material to be welded and a negative terminal is electrically connected with the electrode.

Abstract: A non-transferred plasma arc system, which is provided with a non-transferred plasma torch (1) that is provided with a non-consumable electrode (101) as a negative electrode and an insert chip as a positive electrode, the insert chip being cooled by a circulated coolant (W) and the insert chip releasing a plasma arc onto a workpiece. The plasma arc torch (1) comprises a TIG welding torch (100) that is provided with the non-consumable electrode (101), whereby an arc is generated between the workpiece and said electrode (101), and a torch nozzle (105), which releases a shield gas toward an arc-generated weld pool of the workpiece. The plasma arc torch (1) is provided with an attachment (51) that is detachably attached to the TIG welding torch (100) while surrounding the periphery of the torch nozzle (105) and that functions as the insert chip, whereby a non-transferred plasma arc is inexpensively and easily used.

Abstract: A welding method, which performs non-keyhole welding of a ferritic stainless steel having a plate thickness of 3 mm or less using a plasma welding torch (10), includes supplying an inert gas, as a pilot gas (23), into the gap between a tungsten electrode (11) and an insert chip (12) at a flow rate of 2.1 m/sec or less, and supplying a shield gas (24) into the gap between the insert chip (12) and a shield cap (15), wherein a mixed gas prepared by adding either 0.5 to 4 vol % of oxygen gas or 1 to 6 vol % of carbon dioxide gas to an inert gas is used as the shield gas (24).

Abstract: The present invention relates to a welding torch including a mounting jig for mounting a wire-aiming guide which feeds a welding wire toward a molten pool of a work piece, wherein the mounting jig has a male screw that can be screwed into a female screw provided in a torch body, and is detachably mounted to the torch body; and a mounting jig. The present invention provides the welding torch with which a wire-aiming guide can be stably mounted and which can mount a highly versatile wire-aiming guide; and the mounting jig.

Abstract: A TIG welding method for a ferrite stainless steel sheet is disclosed, wherein a first shield gas is used wherein the gas is a mixture of argon gas and helium gas, 20 to 90% by volume of helium is included in the mixture, and the flow rate S1 of the first shield gas is set in a range of 0.175 m/sec?S1?1.75 m/sec, and a second shield gas is used wherein the gas is argon gas, and the flow rate S2 of the second shield gas is set in a range of 0.05 m/sec?S2?1.51 m/sec.

Abstract: Provided is a plasma arc welding method for continuously welding a welding target part of a welding workpiece while forming a keyhole weld on the welding target part of the welding workpiece using a plasma arc. A pulse current is used for a welding current, and the pulse frequency of the pulse current is controlled so as to be a frequency that is synchronized with a weld pool (P) during the welding. With this approach, vibration of the weld pool during keyhole welding can be controlled so as to synchronize with the pulse frequency of the pulse current. As a result, when the plasma arc keyhole welding is performed, a stable penetration bead having a desired height can be reliably obtained without hanging or irregularity.

Abstract: According to the present invention, a non-consumable electrode type semi-automatic welding system which can conduct welding with high weld deposit and high speed is provided.

Abstract: Provided is a plasma arc welding method for continuously welding a welding target part of a welding workpiece while forming a keyhole weld on the welding target part of the welding workpiece using a plasma arc. A pulse current is used for a welding current, and the pulse frequency of the pulse current is controlled so as to be a frequency that is synchronized with a weld pool (P) during the welding. With this approach, vibration of the weld pool during keyhole welding can be controlled so as to synchronize with the pulse frequency of the pulse current. As a result, when the plasma arc keyhole welding is performed, a stable penetration bead having a desired height can be reliably obtained without hanging or irregularity.

Abstract: The method of monitoring keyhole welding with a plasma arc includes the step of measuring output voltages when welding is performed with a constant current, and the step of finding peak frequencies and distributions of welding voltages by analyzing frequencies of the welding voltages which correlate to a molten weld pool (P) vibration among the output voltages measured. The method also includes the step of identifying the peak frequencies that correlate to the molten weld pool (P) vibration, and the step of comparing the identified peak frequencies with a frequency range and determining whether the welding is good or bad. Thus, whether or not good keyhole welding is carried out can be determined with excellent precision by simply comparing the peak frequency that correlates to the molten weld pool (P) vibration with the frequency range.

Abstract: According to the present invention, an adapter kit is provided in which a welding torch having a single nozzle structure is switched to a welding torch having a double nozzle structure. In an adapter kit (20A) which is installed in a switchable manner in a welding torch (1A) having a single nozzle structure, the present invention includes an attachment (7A) which is mounted to the torch body (5) in a state where the torch nozzle (inner nozzle) (6A) is inserted into the attachment after the gasket is removed and in which a flow channel that supplies a second shielding gas is provided, and an outer nozzle (8A) that is mounted to the attachment (7A) surrounding the periphery of the torch nozzle (6A) and discharges a second shielding gas.