Welding Torch System

Abstract

To provide a welding torch system decreasing a tube diameter of a torch cable.SOLUTION: A welding torch system 1000 is equipped with a torch cable 110 that is coupled to a welding torch 100 at one end, and body side devices 5 and 6 to which the other end of the torch cable 110 is coupled. In the torch cable 110, a power supply line 150 extending from the body side devices 5 and 6 and supplying power to the welding torch 100, and a protective gas supply pipe 140 supplying protective gas to the welding torch 100 are disposed. The protective gas supply pipe 140 is disposed in the power supply line 150.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a welding torch system. [Background technology]

[0002] Prior art documents disclosing welding torch systems include JP 2021-526975 A (Patent Document 1), JP 2018-027555 A (Patent Document 2), and JP 2009-262226 A (Patent Document 3).

[0003] The welding torches used in these welding torch systems have a welding nozzle at the tip of the handle held by the welder, and a torch cable connected to an external main device (such as a feeder) on the opposite side of the handle from the welding nozzle. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Special Publication No. 2021-526975 [Patent Document 2] Japanese Patent Application Publication No. 2018-027555 [Patent Document 3] Japanese Patent Application Laid-Open No. 2009-262226 Summary of the Invention [Problem to be solved by the invention]

[0005] To improve the work efficiency of the welder, a torch cable of, for example, more than 10 meters is used between the main unit and the welding torch, which reduces the burden of moving the main unit (feeder) and significantly expands the work range. As a result, the range of welding work is expanded to include welding work at high altitudes, welding of long objects, welding of large structures, and welding work in narrow spaces.

[0006] However, the torch cable contains a welding wire supply pipe (conduit) that supplies welding wire to the welding torch, a power supply line for power supply, and a protective gas supply pipe for supplying protective gas. As a result, the diameter of the torch cable becomes large, which in turn increases the outer diameter of the welding torch handle that the welder holds, making it difficult for the welder to handle the welding torch.

[0007] The present invention has been made to solve the above-mentioned problems, and aims to provide a welding torch system having a configuration that can reduce the tube diameter of the torch cable and preferably reduce the space inside the welding torch. [Means for solving the problem]

[0008] The welding torch system of the present disclosure includes a welding torch having a welding nozzle at its tip, a torch cable having one end connected to the welding torch, and a main body device having the other end connected to the torch cable.

[0009] Within the torch cable, there are arranged a power supply line extending from the main body device and supplying power to the welding torch, and a protective gas supply pipe supplying protective gas to the welding torch, and the protective gas supply pipe is arranged within the power supply line.

[0010] In one embodiment of the present disclosure, the welding torch includes a handle portion that is held by a welder, a welding nozzle connection portion to which the welding nozzle is connected, and a torch cable connection portion to which the torch cable is connected, and in the internal space of the handle portion, the power supply line with the protective gas supply pipe disposed therein extends to reach the welding nozzle of the welding nozzle connection portion. [Effects of the Invention]

[0011] The welding torch system of the present disclosure allows the diameter of the torch cable to be reduced, and preferably also allows the space inside the welding torch to be reduced in size. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a diagram showing a schematic configuration of the overall configuration of a welding system according to an embodiment of the present invention; [Figure 2] 1 is a partial cross-sectional view showing the structure of a welding torch according to an embodiment of the present invention. [Figure 3] FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2. [Figure 4] 3 is a cross-sectional view of a reference example taken along the line III-III in FIG. 2. FIG. [Figure 5] FIG. 2 is a perspective view of a protective gas supply pipe disposed inside the welding torch of the present embodiment. [Figure 6] FIG. 10 is a perspective view of a protective gas supply pipe and a power supply line arranged inside a welding torch according to another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0013] The welding system 1000 of this embodiment will be described below with reference to the drawings. In the embodiments described below, when numbers, quantities, etc. are mentioned, the scope of the present invention is not necessarily limited to those numbers, quantities, etc., unless otherwise specified. The same reference numerals are used for the same or equivalent parts, and redundant descriptions may not be repeated. It is intended from the beginning that the configurations in the embodiments may be used in appropriate combinations.

[0014] (Overall configuration of welding system 1000) The overall configuration of welding system 1000 will be outlined with reference to Figures 1 and 2. Figure 1 is a diagram showing the overall configuration of welding system 1000, and Figure 2 is a partial cross-sectional view showing the structure of welding torch 100. As shown in Figure 1, welding system 1000 includes a welding power supply 5, a wire feeder 6, a protective gas cylinder 10, and welding torch 100.

[0015] Welding power supply 5 and wire feeder 6 are connected by torch control cable 2, feeder side control cable 7, and power cable 8. Welding power supply 5 and base material 200 are connected by power cable 8.

[0016] The wire feeder 6 and the protective gas cylinder 10 are connected by a protective gas pipe 9 .

[0017] Welding torch 100 and wire feeder 6 are connected by torch cable 110. Within torch cable 110, as will be described later, a protective gas supply pipe 140, a power supply line 150, a welding wire supply pipe 160, and control lines 170 and 180 are arranged.

[0018] Welding power supply 5 supplies power to welding torch 100 for arc welding of base material 200. Welding power supply 5 converts three-phase AC power input from the power system into power suitable for arc welding. Welding power supply 5 converts the three-phase AC power input from the power system into DC power for driving the feed motor of wire feeder 6 and the like, and outputs the DC power to wire feeder 6 via power cable 8.

[0019] Welding power supply 5 is controlled to output power according to welding conditions, etc., which are changed in response to the operation of an operation unit (not shown). Welding power supply 5 changes the welding conditions, etc., in response to a signal input from welding torch 100 via torch control cable 2.

[0020] Wire feeder 6 feeds welding wire to welding torch 100. The welding wire passes through torch cable 110 and a welding wire supply pipe 160 provided inside welding torch 100, and is led to welding nozzle 120 of welding torch 100. Wire feeder 6 drives a feed motor and the like with power supplied from a feeder-side control cable 7.

[0021] This power is supplied to welding torch 100 from wire feeder 6 via power supply line 150 provided inside torch cable 110. Wire feeder 6 communicates with welding power supply 5 via feeder side control cable 7. Wire feeder 6 communicates with welding torch 100 via control lines 170, 180 provided inside torch cable 110. Welding torch 100 and welding power supply 5 communicate via wire feeder 6.

[0022] (Internal structure of Torch Cable 110) Next, the internal structure of torch cable 110 will be described with reference to Figures 3 and 4. Figure 3 is a cross-sectional view taken along the line III-III in Figure 2, and Figure 4 is a cross-sectional view of a reference example taken along the line III-III in Figure 2.

[0023] Inside torch cable 110, there are arranged protective gas supply pipe 140 which supplies protective gas to welding torch 100, power supply line 150 which supplies power to welding torch 100, welding wire supply pipe 160 which supplies welding wire to welding torch 100, and control lines 170 and 180. These lines extend from wire feeder 6, which is a main body side device. Furthermore, protective gas supply pipe 140 is arranged inside power supply line 150.

[0024] In this manner, in the present embodiment, protective gas supply pipe 140 is disposed inside power supply line 150 inside torch cable 110. This makes it possible to reduce the diameter of the internal space of torch cable 110, and therefore the outer diameter of torch cable 110.

[0025] Furthermore, although the power supply line 150 generates heat, by arranging the protective gas supply pipe 140, through which the protective gas flows, inside the power supply line 150, it is possible to expect the effect of cooling the power supply line 150.

[0026] For example, if the power supply line 150 is arranged outside the protective gas supply pipe 140 as shown in Fig. 4, the outer diameter of the torch cable 110 increases accordingly. Furthermore, the effect of cooling the power supply line 150 cannot be expected.

[0027] (Schematic configuration of welding torch 100) The schematic configuration of welding torch 100 will be described with reference to Figures 2, 5, and 6. Figure 5 is a perspective view of protective gas supply pipe 140 arranged inside welding torch 100 of the present embodiment, and Figure 6 is a perspective view of protective gas supply pipe 140 and power supply line 150 arranged inside welding torch 100 of another embodiment.

[0028] Referring to FIG. 2, welding torch 100 includes a handle portion 110A that is held by a welder, a welding nozzle connector 110B to which welding nozzle 120 is connected, and a torch cable connector 110C to which torch cable 110 is connected.

[0029] 2 and 5, in the internal space of the handle portion 110A, a protective gas supply pipe 140 having a power supply line 150 disposed therein is disposed so as to extend to reach the welding nozzle 120 of the welding nozzle connecting portion 110B. The protective gas supply pipe 140 and the welding nozzle 120 are connected by a joint base 190.

[0030] With this configuration, even in the internal space of the handle portion 110A, the protective gas supply pipe 140 is arranged inside the power supply line 150. This makes it possible to reduce the internal space of the handle portion 110A, and therefore the outer diameter of the handle portion 110A.

[0031] Furthermore, even inside welding torch 100, by arranging protective gas supply pipe 140 inside power supply line 150, the effect of cooling power supply line 150 can be expected.

[0032] As shown in FIG. 6, it is also possible to adopt a configuration in which the protective gas supply pipe 140 and the power supply line 150 are routed in separate paths in the internal space of the handle portion 110A.

[0033] While the welding torch system of the present disclosure has been described above in the embodiments, the embodiments disclosed herein are illustrative in all respects and are not limiting. The scope of the present invention is defined by the claims, and includes all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0034] 2 torch control cable, 5 welding power supply, 6 wire feeder, 7 feeder side control cable, 8 power cable, 9 protective gas piping, 10 protective gas cylinder, 100 welding torch, 110 torch cable, 110A handle portion, 110B welding nozzle connection portion, 110C torch cable connection portion, 120 welding nozzle, 140 protective gas supply pipe, 150 power supply line, 160 welding wire supply pipe, 170, 180 control line, 190 joint base, 200 base material, 1000 welding system.

Claims

1. a welding torch having a welding nozzle at its tip; a torch cable having one end connected to the welding torch; a main body side device to which the other end of the torch cable is connected; Equipped with a power supply line extending from the main body device to supply power to the welding torch, a welding wire supply pipe to supply welding wire to the welding torch, and a protective gas supply pipe to supply protective gas to the welding torch are arranged within the torch cable; A welding torch system, wherein the protective gas supply pipe is disposed within the power supply line, and the welding wire supply pipe is provided separately from the power supply line.

2. The welding torch a handle portion that is held by a welder; a welding nozzle connection portion to which the welding nozzle is connected; a torch cable connection portion to which the torch cable is connected; Including, 2. The welding torch system according to claim 1, wherein the power supply line, with the protective gas supply pipe disposed therein, is disposed in the internal space of the handle portion and extends until it reaches the welding nozzle of the welding nozzle connecting portion.

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