Arc welding device, welding work training method, and welding work training assistance program

Abstract

An arc welding device (70) is provided with at least a welding power source (10) and a welding torch (50). In addition, the welding power supply (10) at least comprises a first control part (12), a first input part (14) and a first display part (15). When the welding speed of a workpiece W is set on the basis of information input from a first input unit 14, a first control unit 12 displays a moving image at the welding speed on a first display unit 15.

Description

Technical Field

[0001] The present invention relates to an arc welding device, a welding operation training method and a welding operation training auxiliary program. Background Art

[0002] Conventionally, so-called manual welding has been widely performed, in which a welding worker welds a workpiece by holding a welding torch or the like.

[0003] On the other hand, the performance of manual welding is largely affected by the skills of the welding operator, so it is necessary to fully train the welding operator in welding work, and various training methods have been proposed.

[0004] For example, in Patent Document 1, a simulation system for simulating a welding operator's operation of a welding torch is disclosed. Specifically, the simulation system includes a three-dimensional display device, a computer device, and a tracking controller. The three-dimensional display device simulates welding operations on a three-dimensionally shaped welding part. The computer device sets the work content and work conditions. When the welding operator holds the welding torch to operate, the tracking controller detects the position, posture, and movement trajectory of the front end of the welding torch relative to the three-dimensional display device in real time and in three dimensions. Based on the work content and work conditions set by the computer device, and the position, posture, and movement trajectory of the front end of the welding torch detected by the tracking controller, the simulation system uses the position of the front end of the welding torch as a reference, and simulates and displays in real time the same working conditions that are visually the same as when the welding operator uses the welding torch to perform welding operations.

[0005] In this way, it is possible to perform a simulation suitable for a complex operation that requires judging whether the result of the welding operation is acceptable or not by including an appearance of a plurality of conditions in the welding operation.

[0006] Prior Art Literature

[0007] Patent Literature

[0008] Patent Document 1: Japanese Patent Application Publication No. 2015-225214 Summary of the invention

[0009] However, in manual welding, the welding speed corresponds to the speed at which the welding operator moves the welding torch along the intended welding location in the workpiece.

[0010] However, moving the welding torch at a constant speed along the intended welding position is a difficult task for beginners. Even if the welding speed is set as a numerical value and displayed on the display screen of the welding device, most welding operators cannot understand the feeling of moving the welding torch at this welding speed. Therefore, they worry that they cannot weld at the set welding speed or that the welding speed changes significantly during welding.

[0011] On the other hand, the welding speed affects the heat input to the workpiece. Therefore, when the welding speed is different from the set value or changes greatly, the heat input to the workpiece also differs from the set amount or changes, so unevenness occurs in the welded part. In addition, there is a concern that the width of the weld bead formed on the workpiece changes or the appearance deteriorates.

[0012] The present disclosure is made in view of this point, and its purpose is to provide an arc welding device, a welding operation training method and a welding operation training auxiliary program that can cultivate the feeling of moving the welding torch at a set welding speed in a welding operator who is not familiar with the operation of the welding torch in manual welding.

[0013] In order to achieve the above-mentioned purpose, the arc welding device involved in the present disclosure is an arc welding device that at least has a welding power supply and a welding torch. The arc welding device also has an input unit, a display unit and a control unit. When the welding speed of the workpiece is set based on information input from the input unit, the control unit displays a moving image at the welding speed on the display unit.

[0014] The welding operation training method involved in the present disclosure is a welding operation training method using a welding operation training auxiliary device, wherein the welding operation training auxiliary device at least has an input unit, a control unit and a display unit having a display screen for displaying a two-dimensional image. In the welding operation training method, the first step is: the control unit sets the welding speed of the workpiece based on information input from the input unit, the second step is: the control unit displays the set welding speed and a given mark on the display screen, and displays the given mark on the display screen as moving on the display screen in one direction at the welding speed, and the third step is: the welding operator moves the handheld welding torch along the display screen and matches the movement of the mark until the welding operator determines that the welding torch can be moved at the welding speed, and the second step and the third step are repeatedly performed.

[0015] The welding operation training supporting program according to the present disclosure enables a computer system having one or more processors to execute the first step and the second step in the welding operation training method.

[0016] According to the present disclosure, a welding operator who is not familiar with the operation of a welding torch in manual welding can be trained to move the welding torch at a set welding speed. In addition, training to move the welding torch at a set welding speed can be easily and effectively performed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic configuration diagram of the arc welding device according to the first embodiment.

[0018] Figure 2This is a schematic diagram showing an example of a screen displayed on the first display unit after the welding speed is set.

[0019] Figure 3 It is a schematic diagram showing a change in the length of a mark displayed on the first display unit.

[0020] Figure 4 It is a schematic diagram showing the first display unit displaying a cross mark.

[0021] Figure 5 is a flow chart showing the welding work training sequence.

[0022] Figure 6 This is a schematic diagram showing the movement training of the welding torch.

[0023] Figure 7 Schematic diagram showing a flat plate on which a cross mark is displayed according to Modification 1.

[0024] Figure 8 This is a schematic diagram showing a state where LED indicators of the first display unit according to the second embodiment light up sequentially.

[0025] Fig. 9 This is a schematic diagram showing a surface light source of the first display unit according to Modification Example 2. DETAILED DESCRIPTION

[0026] Hereinafter, embodiments of the present disclosure will be described based on the drawings. Note that the following description of the preferred embodiments is merely illustrative in nature and is not intended to limit the present disclosure, its applications, or its uses.

[0027] (First embodiment)

[0028] [Structure of arc welding device]

[0029] Figure 1 1 is a schematic diagram of the configuration of an arc welding device according to the first embodiment. The arc welding device 70 includes a welding power source 10 , a remote controller 20 , a wire feeding device 30 , and a welding torch 50 .

[0030] The welding power source 10 includes at least a main circuit 11 for generating welding power, a first control unit 12, a first storage unit 13, a first input unit 14, and a first display unit 15. The main circuit 11 supplies welding power to the welding wire 60 held in the welding torch 50. The main circuit 11 includes a transformer and a power switch, etc., which are not shown. In the example shown in this embodiment, the positive terminal is connected to the welding wire 60 via the welding wire feeding device 30, and the negative terminal is connected to the workpiece W via the ground wire 41.

[0031] The first control unit 12 is composed of a CPU (Central Processing Unit), an MCU (MicroController Unit), or a combination thereof. Alternatively, the first control unit 12 may be composed of a plurality of CPUs or MCUs, or a combination thereof.

[0032] The first control unit 12 reads out the welding program pre-stored in the first storage unit 13 based on the input content from the first input unit 14 or the remote controller 20, and controls the operation of the main circuit 11. Furthermore, the first control unit 12 changes the welding conditions and sends a wire feeding instruction to the wire feeding device 30 based on the input content from the first input unit 14 or the remote controller 20.

[0033] The first storage unit 13 is composed of a semiconductor memory, such as a RAM (Random Access Memory), an SSD (Solid State Drive), etc. The first storage unit 13 stores welding programs and welding conditions required to execute the programs. In addition, the welding conditions may be in a table format. In this case, in the first storage unit 13, a group of multiple welding parameters corresponding to the type of the workpiece W as the welding object is stored in a table format, and the group of welding parameters is called a welding condition table. In addition, in the first storage unit 13, a welding operation training auxiliary program described later is stored.

[0034] The types of workpieces W are classified according to the material of the workpieces W, the welding method (direct current or pulse), and the diameter of the welding wire 60 (hereinafter, sometimes referred to as the wire diameter). In addition, the types of workpieces W are also classified according to the shape of the workpieces W and the plate thickness of the workpieces W. In addition, when a shielding gas is blown to the welding part from a gas supply pipe (not shown) provided in the welding cable 40, the types of workpieces W are also classified according to the type of shielding gas.

[0035] The main welding parameters in this embodiment are: the welding current flowing from the main circuit 11 through the welding wire 60, the welding voltage applied between the welding wire 60 and the workpiece W, the feeding speed of the welding wire 60 by the welding wire feeding device 30, and the welding speed. In addition, when a shielding gas is used, the flow rate of the shielding gas is also included in the welding parameters.

[0036] Here, the welding speed refers to the moving speed when the welding operator moves the welding torch 50 along the welding line on the workpiece W. The welding line is a virtual line on the surface of the workpiece W, and a weld bead (not shown) is formed on the surface of the workpiece W along the welding line after manual welding.

[0037] Furthermore, the first storage unit 13 may temporarily store input contents from the first input unit 14 or the remote controller 20 .

[0038] The first input unit 14 includes operation buttons, a jog dial, etc. (not shown). The first input unit 14 may include a touch panel. In this case, the first display unit 15 may be used as a touch panel and shared with the first input unit 14 .

[0039] The welding operator operates the first input unit 14 to input the aforementioned welding conditions and selects the aforementioned welding condition table. If there is a welding parameter to be changed in the selected welding condition table, the welding operator also operates the first input unit 14 to make the change.

[0040] The first display unit 15 is composed of a liquid crystal display 15a (see Figure 2 , Figure 4 ) and other display devices. The liquid crystal display 15a is a display screen that displays a two-dimensional image. The first display unit 15 displays welding conditions called from the first storage unit 13, newly input welding conditions, and various parameters during welding. In addition, as described later, the first display unit 15 displays the welding speed set by the welding operator and the moving image at the welding speed, that is, the gauge mark M1 and the cross mark M2.

[0041] The remote controller 20 includes at least a second input unit 21, a second control unit 22, and a second display unit 23. Usually, a welding operator holds the remote controller 20 and operates it manually.

[0042] The second input unit 21 includes operation buttons, a jog dial, etc. (not shown). The second input unit 21 may include a touch panel, and in this case, the second display unit 23 may be used in common with the second input unit 21 as a touch panel.

[0043] The welding operator operates the second input unit 21 to input the welding conditions described above, call up the welding condition table, and further change the welding parameters in the welding condition table.

[0044] The second control unit 22 is constituted by a CPU or an MCU or a combination thereof, similarly to the first control unit 12. The second control unit 22 transmits the content input by the welding operator through the operation of the second input unit 21, such as the change value of the welding parameter, to the first control unit 12 of the welding power source 10. In addition, the remote controller 20 receives the welding conditions in use from the first control unit 12 of the welding power source 10, and causes the second input unit 21 to display the content. In addition, the second control unit 22 transmits the input content to the second input unit 21 to the first storage unit 13 of the welding power source 10, and the first control unit 12 calls the input content from the first storage unit 13.

[0045] The second display unit 23 is composed of a liquid crystal display 23a (see Figure 2 , Figure 4 ) and other display devices. The liquid crystal display 23a is a display screen that displays a two-dimensional image. The second display unit 23 displays the welding conditions called from the first storage unit 13, the newly input welding conditions, and various parameters during welding, as in the first display unit 15. In addition, as described later, the second display unit 23 can also display the welding speed set by the welding operator and the moving image at the welding speed, that is, the gauge mark M1 and the cross mark M2.

[0046] In addition, Figure 1 In the example shown, the remote controller 20 is connected to the welding power source 10 via the first signal line 31, the second signal line 32, and the wire feeder 30, but the present invention is not particularly limited to this example. For example, the welding cable 40 may be integrated with the first signal line 31, and the first signal line 31 may be branched from the middle and connected to the remote controller 20. Alternatively, the first signal line 31 may be directly connected to the welding power source 10. Alternatively, the second control unit 22 of the remote controller 20 and the first control unit 12 of the welding power source 10 may be configured to be able to communicate with each other wirelessly. In this case, the first signal line 31 and the second signal line 32 are omitted. In addition, a communication unit (not shown) may be provided in each of the welding power source 10 and the remote controller 20 for mutual communication.

[0047] As described above, the welding power source 10 or the combination of the welding power source 10 and the remote controller 20 includes a CPU or an MCU and the first storage unit 13 , and can also be understood as a computer system.

[0048] The wire feeding device 30 feeds the welding wire 60 toward the workpiece W based on the wire feeding command from the welding power source 10 or the remote controller 20. In addition, a so-called reverse feeding operation of feeding the welding wire 60 away from the workpiece W may be performed.

[0049] The welding cable 40 is a composite cable in which a feed pipe (not shown) for the welding wire 60 and a supply pipe (not shown) for the shielding gas are integrated.

[0050] The welding torch 50 is manually operated by a welding operator, and the welding wire 60 held in the welding torch 50 is fed toward the workpiece W. A predetermined welding power is supplied to the welding wire 60, and the front end of the melted welding wire 60 moves toward the workpiece W, and welding is sequentially performed. In addition, a shielding gas is blown from the welding cable 40 toward the welding portion.

[0051] Furthermore, in the present embodiment, a so-called consumable electrode type arc welding device is described in which the welding wire 60 is melted and transferred to the workpiece W. However, the arc welding device 70 may be a non-consumable electrode type arc welding device.

[0052] [About the display method of the moving image at welding speed]

[0053] Figure 2 This is a schematic diagram showing an example of a screen displayed on the first display unit after the welding speed is set. Figure 3 It is a schematic diagram showing a change in the length of a mark displayed on the first display unit. Figure 4 It is a schematic diagram showing the first display unit displaying a cross mark.

[0054] As described above, in a state where an arc is generated between the welding torch 50 and the workpiece W, the welding operator moves the handheld welding torch 50 along a predetermined welding line to weld the workpiece W. Therefore, the welding speed among the welding parameters is greatly affected by the feeling and skill of the welding operator.

[0055] Generally, when a welding operator is a beginner or has little experience in welding work, even if the welding speed is set as a numerical value and displayed on the first display unit 15 or the second display unit 23, the welding operator often cannot understand the feeling of moving the welding torch 50 at the welding speed. Therefore, welding cannot be performed at the set welding speed, or the welding speed changes greatly during welding.

[0056] However, the welding speed affects the heat input to the workpiece. Therefore, when the welding speed is different from the set value or changes greatly, the heat input to the workpiece also differs from the set amount or changes, so unevenness occurs in the welded part. In addition, there is a concern that the width of the weld bead formed on the workpiece changes or the appearance deteriorates.

[0057] Therefore, in the arc welding device 70 of the present embodiment, the first display unit 15 or the second display unit 23 displays not only the set value of the welding speed but also a moving image under the set value, thereby allowing the welding operator to develop a feeling of moving the welding torch 50 at the set welding speed. This will be described in detail below using the drawings.

[0058] When determining welding conditions according to the type of workpiece W, such as Figure 2As shown, the liquid crystal display 15a displays details of the type of workpiece W, gas type and flow rate, etc. In addition, welding parameters under the welding conditions are also displayed. Figure 2 Although not shown, the welding current, welding voltage, and feed speed of the welding wire 60 are displayed on the liquid crystal display 15a.

[0059] Furthermore, if Figure 2 As shown, the set value of the welding speed is also displayed. In addition, the gauge mark M1 is also displayed at the same time. The gauge mark M1 is a gauge with a given length, and the length is displayed as changing according to the welding speed. Specifically, as shown in FIG. Figure 3 As shown, the length of the gauge mark M1 changes from zero to a given length, and the display is set to repeat every given period, in this case, every 1 second. The length of the gauge mark M1 is equivalent to the moving distance of the gauge mark M1, and the speed of change of the length of the gauge mark M1 is equivalent to the welding speed.

[0060] In addition, the welding speed is displayed in two units. Generally, when the welding speed is set as a welding parameter, m / min is often used as the unit. However, in this case, it is sometimes impossible to capture an image of the welding operator moving the welding torch 50 at the welding speed.

[0061] Therefore, in this embodiment, the welding speed is displayed not only in m / min, but also in mm / sec or cm / sec. In most cases, the size of the liquid crystal display 15a of the first display unit 15 is several cm square, or the size in the long side direction is several cm to more than ten cm. Therefore, the length of the displayed gauge mark M1 is less than several cm even if it is long.

[0062] Therefore, displaying the welding speed in units of mm / sec or cm / sec has an advantage that it is easy for a welding operator who visually checks the change in the length of the gauge mark M1 to intuitively grasp the moving image of the welding speed.

[0063] In addition, when displaying the moving image at the welding speed, the shape of the mark is not limited to Figure 2 , Figure 3 For example, Figure 4 As shown, the liquid crystal display 15 a of the first display unit 15 may be caused to display a cross-shaped mark M2 (hereinafter, sometimes referred to as the cross mark M2 ) moving linearly at the welding speed.

[0064] In addition, the display screen that displays the moving image at the welding speed is not limited to the liquid crystal display 15 a of the first display unit 15 , and may be the liquid crystal display 23 a of the second display unit 23 .

[0065] [Welding operation training sequence]

[0066] Figure 5 is a flow chart showing the welding work training sequence. Figure 6 This is a schematic diagram showing the movement training of the welding torch.

[0067] As described above, the first display unit 15 or the second display unit 23 displays Figure 2 to Figure 4 The gauge mark M1 and the cross mark M2 shown in FIG. 4 can enable the welding operator to visually grasp the image of the welding torch 50 being moved at the welding speed.

[0068] Furthermore, by utilizing this point, the welding operator can be trained to move the welding torch 50 at a welding speed using the arc welding device 70 shown in this embodiment. Figure 5 Here, a case where the first input unit 14 is operated to display the cross mark M2 on the first display unit 15 will be described as an example.

[0069] First, the welding operator operates the first input unit 14 to start the welding work training support program stored in the first storage unit 13 (step S1 ).

[0070] Next, the welding operator operates the first input unit 14 to directly input and set welding conditions, or calls up a welding condition table stored in the first storage unit 13 (step S2 ).

[0071] Furthermore, a navigation function for easily setting welding parameters may be installed in the arc welding device 70. Usually, a program for executing the navigation function is stored in the first storage unit 13, and the welding operator operates the first input unit 14 to call out the program, and the program is executed by the first control unit 12. In addition, in this case, when setting welding parameters, a guide is displayed on the liquid crystal display 15a, and the required items are selected in sequence according to the guide, thereby automatically selecting welding parameters such as welding current, welding voltage, and welding speed from the database stored in the first storage unit 13, that is, a plurality of welding condition tables.

[0072] The first control unit 12 sets the welding speed according to the welding conditions set in step S2 (step S3 : first step).

[0073] Next, the first control unit 12 causes the liquid crystal display 15a of the first display unit 15 to display the welding speed and the cross mark M2 set in step S3 (step S4: second step). Furthermore, the first control unit 12 causes the liquid crystal display 15a to display the cross mark M2 moving along a given direction at the welding speed on the liquid crystal display 15a (step S5: second step). In the present embodiment, the aforementioned given direction is the long side direction of the liquid crystal display 15a. In addition, step S5 is repeatedly executed every given cycle. That is, the process of the cross mark M2 moving at the welding speed is repeatedly displayed on the liquid crystal display 15a.

[0074] During execution of step S5, the welding operator moves the handheld welding torch 50 along the surface of the liquid crystal display 15a in accordance with the movement of the cross mark M2 (step S6: third step). By executing step S6, the welding operator is trained to move the welding torch 50 in accordance with the set welding speed.

[0075] After executing step S6, the welding operator determines by himself whether the welding torch 50 can be moved at the set welding speed (step S7). The judgment basis is whether the front end of the welding torch 50 moves without deviating from the movement of the cross mark M2. Further, step S7 is judged by whether the front end of the welding torch 50 is moved within a given distance from the cross mark M2 when the cross mark M2 moves. However, a third party present when step S6 is executed can also make the judgment in step S7. Alternatively, the movement of the front end of the welding torch 50 can be photographed by a camera not shown in the figure, and the first control unit 12 determines whether the moving speed of the front end of the welding torch 50 matches the moving speed of the cross mark M2. In this case, the position data of the front end of the welding torch 50 on the liquid crystal display 15a is calculated based on the video data of the camera.

[0076] If the result of the determination in step S7 is affirmative, that is, if the welding operator determines that the welding torch 50 can be moved at the set welding speed, the training of the welding work is terminated.

[0077] On the other hand, if the determination result of step S7 is negative, that is, if the welding operator determines that the welding torch 50 cannot be moved at the set welding speed, a series of processes from step S4 to step S6 are repeatedly executed until the determination result of step S7 becomes positive.

[0078] Note that the processing in steps S3 to S5 corresponds to the execution content in the welding work training support program.

[0079] In addition, Figure 5 During the welding work training shown, the second input unit 21 may be operated to display the cross mark M2 on the second display unit 23 .

[0080] [Effects, etc.]

[0081] As described above, the arc welding device 70 according to the present embodiment includes at least the welding power source 10 and the welding torch 50. The welding power source 10 includes at least the first control unit 12, the first input unit 14, and the first display unit 15.

[0082] When the welding speed of the workpiece W is set based on the information input from the first input unit 14 , the first control unit 12 causes the first display unit 15 to display a moving image at the welding speed.

[0083] According to the present embodiment, the first display unit 15 displays the moving image at the set welding speed, so that the welding operator can visually grasp the movement of the "object" at the welding speed, which is difficult to grasp only by numerical values. As a result, the welding operator who is not familiar with manual welding can develop a sense of moving the welding torch 50 at the welding speed when welding the workpiece W.

[0084] The first display unit 15 includes a liquid crystal display 15 a as a display screen for displaying a two-dimensional image.

[0085] The first control unit 12 causes the liquid crystal display 15 a to display the set welding speed, and also causes the liquid crystal display 15 a to display the gauge mark M1 and the cross mark M2 that move or deform according to the welding speed.

[0086] In this way, the welding operator can visually grasp the movement or deformation of the gauge mark M1 and the cross mark M2 at the welding speed, and can easily and reliably grasp the feeling of moving the welding torch 50 at the welding speed.

[0087] The gauge mark M1 is set so that the length along one direction, for example, the long side direction of the liquid crystal display 15a becomes longer as the welding speed increases, and this length indicates the moving distance at the welding speed.

[0088] Furthermore, the first control unit 12 causes the liquid crystal display 15 a to display the gauge mark M1 so that the length of the gauge mark M1 repeatedly changes from zero to a predetermined length at every predetermined period.

[0089] The length of the gauge mark M1 changes according to the welding speed, so that the welding operator can easily visually grasp the moving image of the object at the welding speed. In addition, the gauge mark M1 periodically repeats the change in length and is displayed on the first display unit 15 at the same time, so that the welding operator can reliably cultivate the feeling of moving the welding torch 50 at the welding speed.

[0090] The first control unit 12 can also display the cross mark M2 on the liquid crystal display 15 a so as to move in one direction at the welding speed on the liquid crystal display 15 a .

[0091] In this way, the welding operator can easily visually grasp the moving image of the object at the welding speed. In addition, since the cross mark M2 moves on the liquid crystal display 15a at the set welding speed, the welding torch 50 can be moved at the welding speed while observing the cross mark M2. Thus, it is easy to train the welding operator to move the welding torch 50 held by the welding operator at the welding speed.

[0092] In addition, in the present embodiment, M2 is set as a cross mark, but its shape is not particularly limited to this. However, it is preferred that the shape of M2 does not change during display. This makes it easy to train while observing the mark M2 and moving the welding torch 50. In addition, for the same reason, it is preferred that the center of the mark M2 is a shape that can be reliably visually recognized.

[0093] The welding work training method according to the present embodiment is performed using the arc welding device 70 , specifically, any one of the welding power source 10 or the remote controller 20 .

[0094] The welding power source 10 includes at least a first control unit 12, a first input unit 14, and a first display unit 15. The first display unit 15 includes a liquid crystal display 15a as a display screen that displays a two-dimensional image.

[0095] The remote controller 20 includes at least a second input unit 21, a second control unit 22, and a second display unit 23. The second display unit 23 includes a liquid crystal display 23a as a display screen for displaying a two-dimensional image.

[0096] This welding operation training method includes at least the first to third steps shown below.

[0097] In step 1 ( Figure 5 In step S3 ), the first control unit 12 or the second control unit 22 sets the welding speed of the workpiece W based on the information input from the first input unit 14 or the second input unit 21 .

[0098] In step 2 ( Figure 5 In steps S4 and S5), the first control unit 12 or the second control unit 22 causes the liquid crystal display 15a or the liquid crystal display 23a to display the set welding speed and the cross mark M2. Further, the first control unit 12 or the second control unit 22 displays the cross mark M2 on the liquid crystal display 15a or the liquid crystal display 23a as moving along one direction at the welding speed on the liquid crystal display 15a or the liquid crystal display 23a.

[0099] In step 3 ( Figure 5In step S6), the welding operator moves the handheld welding torch 50 along the surface of the liquid crystal display 15a or the liquid crystal display 23a in accordance with the movement of the cross mark M2.

[0100] The second and third steps described above are repeatedly performed until the welding operator determines that the welding torch 50 can be moved at the set welding speed.

[0101] According to the welding operation training method of this embodiment, since the cross mark M2 moves on the liquid crystal display 15a at the set welding speed, the welding operator can move the welding torch 50 at the welding speed while observing the cross mark M2. Thus, the welding operator can be easily trained to move the handheld welding torch 50 at the welding speed, that is, the welding operation training.

[0102] Furthermore, the operation of moving the welding torch 50 at the welding speed while observing the cross mark M2 is repeated until the welding operator determines that the operation is familiar. This allows effective training and improves the skills of the welding operator to a certain level.

[0103] In addition, a plurality of welding workers can improve their skills by executing the welding work training method shown in this embodiment. Thus, it is possible to suppress the shape and appearance variation of the weld bead for each welding worker, and to form a weld bead with a good shape and appearance.

[0104] The welding operation training program according to the present embodiment enables a computer system having one or more processors to execute the first step ( Figure 5 Step S3) and Step 2 ( Figure 5 Steps S4 and S5 of the present embodiment). In addition, the computer system in the present embodiment includes the first control unit 12 in the welding power source 10 or the second control unit 22 in the remote controller 20. Preferably, the computer system includes a storage unit, and in the present embodiment, includes the first storage unit 13. In addition, when the welding operation training program is executed by the second control unit 22, the welding operation training program is called out from the first storage unit 13, and the second input unit 21 is operated to execute the welding operation training program. In addition, a storage unit (not shown) may also be provided in the remote controller 20, and the welding operation training program is stored in the storage unit.

[0105] In this way, by programming the execution order of the method for assisting welding work training, the welding worker can be trained in welding work simply and efficiently.

[0106] <Variation 1>

[0107] Figure 7is a schematic diagram showing a flat plate on which a cross mark according to Modification Example 1 is displayed. Figure 7 In the drawings shown below, the same reference numerals are given to the same parts as those in the first embodiment, and detailed description thereof will be omitted.

[0108] In the first embodiment, the following example is shown: the welding power source 10 includes a first control unit 12, a first input unit 14, and a first display unit 15, and the first control unit 12 causes the liquid crystal display 15a of the first display unit 15 to display a gauge mark M1 or a cross mark M2 based on information input from the first input unit 14.

[0109] In addition, the following situation is also shown: the remote controller 20 may also have a second input unit 21, a second control unit 22 and a second display unit 23. The second control unit 22 causes the liquid crystal display 23a of the second display unit 23 to display the gauge mark M1 or the cross mark M2 based on the information input from the second input unit 21.

[0110] On the other hand, training for developing a sense of welding speed and training of welding work itself can be performed even without preparing a complete set of arc welding apparatus 70.

[0111] For example, training to develop a sense of welding speed can also be performed using only welding power source 10 or only remote controller 20. In addition, if a tool (not shown) imitating welding torch 50 and either welding power source 10 or remote controller 20 are prepared, welding work training can be performed.

[0112] In other words, any machine having an input unit, a display unit, and a control unit can perform the above two trainings. In addition, the CPU or MCU included in the control unit usually has a memory for temporary storage, so the welding operation training auxiliary program can be read into the machine from a storage unit (not shown) provided outside the machine.

[0113] Therefore, training for developing a sense of welding speed and training for welding work can be performed even when using the generally used tablet 80. Although not shown, the tablet 80 includes a control unit and an input unit.

[0114] Specifically, Figure 7 As shown, the liquid crystal display 81a included in the display unit 81 of the tablet 80 displays the movement of the cross mark M2 at the set welding speed. In addition, the welding worker is trained by moving the tool held by the welding worker in accordance with the movement of the cross mark M2.

[0115] That is, the structure shown in this modification can also achieve the same effect as that achieved by the structure shown in the first embodiment. That is, a welding operator who is not familiar with manual welding can develop a sense of moving the welding torch 50 at the welding speed when welding the workpiece W. In addition, by moving the tool held by the welding operator in accordance with the movement of the cross mark M2, welding operation training can be easily performed.

[0116] In addition, when comparing the first embodiment and the present modification, it can be said that the welding power source 10, the remote controller 20, and Figure 7 The illustrated tablet 80 is a welding work training auxiliary device for improving the operating skills of the welding torch 50 in manual welding.

[0117] (Second embodiment)

[0118] Figure 8 This is a schematic diagram showing a state where LED indicators of the first display unit according to the second embodiment light up sequentially.

[0119] Figure 8 The first display unit 15 shown in the figure has an LED indicator 15b. Figure 1 The first display unit 15 of the first embodiment shown in the figure is different. Figure 8 The first display unit 15 shown may also have Figure 2 The liquid crystal display 15a is shown.

[0120] The LED indicator 15b is composed of a plurality of LEDs arranged in a row at intervals from each other. In this embodiment, when the welding speed is set and the first input unit 14 is operated, as shown in FIG. Figure 8 As shown, the first control unit 12 is configured to sequentially light up the LEDs of the LED indicator 15b in accordance with the welding speed.

[0121] This allows the welding operator to easily visually grasp the moving image of the object at the welding speed. This allows the welding operator who is not familiar with manual welding to develop a sense of moving the welding torch 50 at the welding speed when welding the workpiece W.

[0122] In addition, in this embodiment, the LED indicator 15b is used to display the moving image at the welding speed, but it is not particularly limited to this, and any one of them may be a plurality of point light sources arranged at intervals in one direction.

[0123] <Variation 2>

[0124] Fig. 9 This is a schematic diagram showing a surface light source of the first display unit according to Modification Example 2.

[0125] Fig. 9The first display unit 15 of the present variation shown in the figure has a surface light source 15c, which is different from Figure 1 The first display unit 15 of the first embodiment shown in the figure is different. Fig. 9 The first display unit 15 shown may also have Figure 2 The liquid crystal display 15a is shown.

[0126] The surface light source 15c is rectangular and is configured to emit light with the color changing stepwise along the long side direction. In the first display unit 15 of this modified example, when the welding speed is set and the first input unit 14 is operated, as shown in FIG. Figure 8 As shown, the first control unit 12 drives the surface light source 15c according to the welding speed so that the surface light source 15c emits light while the color changes stepwise along the longitudinal direction.

[0127] This allows the welding operator to easily visually grasp the moving image of the object at the welding speed. This allows the welding operator who is not familiar with manual welding to develop a sense of moving the welding torch 50 at the welding speed when welding the workpiece W.

[0128] In this modification, the surface light source 15c emits light with color changing stepwise along the longitudinal direction, but the present invention is not particularly limited thereto. For example, the surface light source 15c may emit light with brightness changing stepwise along the longitudinal direction.

[0129] (Other Implementations)

[0130] In addition, in the present specification, an example in which the first storage unit 13 is provided in the welding power source 10 is shown, but the storage destination of the welding program, the welding condition table, and the welding operation training auxiliary program is not particularly limited to this. For example, instead of providing the first storage unit 13 in the welding power source 10, an external memory may be connected to the welding power source 10, and the external memory may be used as the storage destination of the welding program, the welding condition table, and the welding operation training auxiliary program. The external memory may be, for example, an SD (registered trademark) card, a USB (trademark) memory, or a server configured to communicate with the welding power source 10.

[0131] In addition, in the present specification, the liquid crystal displays 15a, 23a, and 81a are shown as display screens for displaying two-dimensional images, but the present invention is not particularly limited thereto. For example, an organic EL display may be used instead of a liquid crystal display.

[0132] Industrial Applicability

[0133] The arc welding device disclosed in the present invention can help welding workers who are not familiar with manual welding to develop a sense of moving the welding torch at welding speed, and is therefore useful.

[0134] -Explanation of symbols-

[0135] 10 Welding power source (welding operation training auxiliary device)

[0136] 11 Main circuit

[0137] 12. 1st Control Unit (Control Unit)

[0138] 13. Storage Unit 1

[0139] 14 1st input unit (input unit)

[0140] 15. 1st display unit (display unit)

[0141] 15a LCD display

[0142] 15b LED indicator

[0143] 15c Surface light source

[0144] 20 Remote controller (welding operation training auxiliary device)

[0145] 21 Second input unit (input unit)

[0146] 22. Second control unit (control unit)

[0147] 23. Second display unit (display unit)

[0148] 23a LCD display

[0149] 30 Wire feeding device

[0150] 31 1st signal line

[0151] 32 2nd signal line

[0152] 40 Welding Cable

[0153] 41 Ground

[0154] 50 Welding torch

[0155] 60 welding wire

[0156] 70 Arc welding device

[0157] 80 Plate (welding operation training auxiliary device)

[0158] 81 Display

[0159] 81a LCD display

[0160] M1 Gauge Marking

[0161] M2 Cross Mark

[0162] W workpiece.

Claims

1. An arc welding device comprising at least a welding power source and a welding torch, It also includes an input unit, a display unit and a control unit. When the welding speed of the workpiece is set based on the information input from the input unit, The control unit displays the moving image at the welding speed on the display unit.

2. The arc welding device according to claim 1, in, The display unit has a display screen for displaying a two-dimensional image. The control unit displays the set welding speed on the display screen, and displays a mark that moves or deforms at the welding speed on the display screen.

3. The arc welding device according to claim 2, in, The mark is set so that the length along one direction becomes longer at the welding speed. The length of the mark indicates the moving distance at the welding speed.

4. The arc welding device according to claim 3, in, The control unit displays the mark on the display screen so that the length of the mark repeatedly changes from zero to a predetermined length at every predetermined period.

5. The arc welding device according to claim 2, in, The control unit displays the mark on the display screen so as to move along one direction on the display screen at the welding speed.

6. The arc welding device according to claim 1, in, The display unit includes a plurality of point light sources arranged at predetermined intervals in one direction. When the welding speed is set, the control unit sequentially lights up the plurality of point light sources according to the welding speed.

7. The arc welding device according to claim 1, in, The display unit has a surface light source with a long side direction. When the welding speed is set, the control unit drives the surface light source according to the welding speed so that the surface light source emits light while the color or brightness changes stepwise along the one direction.

8. A welding operation training method, which is a welding operation training method using a welding operation training auxiliary device, The welding operation training auxiliary device at least comprises an input unit, a control unit, and a display unit having a display screen for displaying a two-dimensional image. In the welding operation training method, The first step is: the control unit sets the welding speed of the workpiece based on the information input from the input unit, The second step is: the control unit displays the set welding speed and a given mark on the display screen, and displays the given mark on the display screen so as to move on the display screen in one direction at the welding speed. The third step is: the welding operator moves the handheld welding torch along the display screen and in accordance with the movement of the mark, The second step and the third step are repeatedly performed until the welding operator determines that the welding torch can be moved at the welding speed.

9. A welding operation training auxiliary program, used to enable a computer system having one or more processors to execute the first step and the second step in the welding operation training method according to claim 8.

Images