Arc welding device, welding condition correction method using same, and welding condition correction program

Abstract

An arc welding device (70) is provided with a welding power source (10), a remote controller (20), and a welding torch (50). The remote controller (20) has a touch panel (21a). A first storage unit (13) of a welding power supply (10) stores a plurality of welding condition tables for each of a plurality of types of workpieces (W). A second calculation unit (22a) of the remote controller (20) measures and calculates a first speed, which is the speed of movement of the hand of the welding operator, and when the difference between the first welding speed in a first welding condition table read from a first storage unit (13) and the first speed exceeds a predetermined range, the remote controller (20) controls the remote controller (20). And correcting each welding parameter of the first welding condition table according to the difference.

Description

Technical Field

[0001] The present disclosure relates to an arc welding apparatus, a welding condition correction method using the arc welding apparatus, and a welding condition correction program. Background Art

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

[0003] On the other hand, since the completion state of manual welding is greatly affected by the skill of the welder, it is necessary to sufficiently train the welder in welding work, and various training methods have been proposed.

[0004] For example, Patent Document 1 discloses a simulation system that simulates the operation of a welding torch by a welder. Specifically, the simulation system includes a three-dimensional display device, a computer device, and a tracking controller. The three-dimensional display device simulates welding work on a three-dimensional shaped welding part. The computer device sets the work content and work conditions. The tracking controller, when the welder holds the welding torch and operates it, detects the position, posture, and movement trajectory of the tip of the welding torch relative to the three-dimensional display device in real time and three-dimensionally. The simulation system, based on the work content, work conditions set by the computer device, and the position, posture, and movement trajectory of the tip of the welding torch detected by the tracking controller, virtually displays in real time a work condition that is visually the same as the situation where the welder uses the welding torch to perform welding work, with the position of the tip of the welding torch as a reference.

[0005] Thereby, it is possible to perform a simulation of a complex work suitable for determining whether the result of welding work is good or bad by including the appearance of multiple conditions in the welding work.

[0006] Prior Art Documents

[0007] Patent Documents

[0008] Patent Document 1: Japanese Unexamined 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 welder moves the welding torch along the welding predetermined part in the workpiece.

[0010] However, it is a difficult task for beginners to move the welding torch along the welding predetermined part at a constant speed. Therefore, when a beginner performs manual welding, the moving speed of the welding torch sometimes deviates or deviates from the target value.

[0011] However, variations in the welding speed affect the actual values of the welding current and the welding voltage. Therefore, during welding, the actual values of the welding current and the welding voltage sometimes deviate from the values set before the start of welding for performing desired welding. In addition, due to this, the shape of the weld bead formed on the workpiece sometimes differs from the desired shape. Further, the appearance of the weld bead may deteriorate.

[0012] The present disclosure has been made in view of this, and an object thereof is to provide an arc welding apparatus capable of appropriately correcting welding conditions, specifically welding parameters, according to the proficiency of a welding operator, and a welding condition correction method and a welding condition correction program using the arc welding apparatus.

[0013] In order to achieve the above object, the arc welding apparatus according to the present disclosure is characterized in that it includes at least an input unit, a storage unit, an arithmetic unit, a welding power source, and a torch. The input unit includes a touch panel. The storage unit stores a plurality of welding condition tables for each of a plurality of types of workpieces. The arithmetic unit calculates a first speed based on the moving distance of the hand detected by the touch panel when the welding operator moves his own hand along the surface of the touch panel, reads a first welding condition table from the plurality of welding condition tables corresponding to the workpiece to be welded from the storage unit, and when the difference between the first welding speed described in the first welding condition table and the first speed exceeds a given range, the arithmetic unit corrects the welding parameters described in the first welding condition table according to the difference.

[0014] The welding condition correction method according to the present disclosure is a welding condition correction method using the arc welding apparatus, and is characterized in that in a first step, the first speed when the welding operator moves his own hand along the surface of the touch panel is calculated, and in a second step, when the difference between the first welding speed and the first speed exceeds the given range, the welding parameters described in the first welding condition table are corrected according to the difference.

[0015] The welding condition correction program according to the present disclosure is characterized in that it causes a computer system having one or more processors to execute each step in the welding condition correction method.

[0016] According to the present disclosure, welding parameters can be appropriately corrected according to the proficiency of the welding operator. In addition, the proficiency of the welding operator related to the operation of the torch can be quantitatively grasped. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic configuration diagram of an arc welding apparatus according to an embodiment.

[0018] Figure 2It is a flowchart showing the welding condition correction step.

[0019] Figure 3 It is a schematic diagram showing the display screen of the remote controller during the first speed measurement process.

[0020] Figure 4 It is a schematic diagram showing the display screen of the welding power source during the first speed measurement process. Detailed implementation mode

[0021] Hereinafter, embodiments of the present disclosure will be described based on the drawings. In addition, the description of the following preferred embodiments is essentially only an example and is not intended to limit the present disclosure, its applicable objects, or its uses.

[0022] (Embodiment)

[0023] [Structure of arc welding device]

[0024] Figure 1 It shows a schematic structural diagram of the arc welding device according to the embodiment. The arc welding device 70 includes a welding power source 10, a remote controller 20, a wire feeding device 30, and a torch 50.

[0025] The welding power source 10 includes at least a main circuit 11 that generates welding power, a first control unit 12, a first storage unit 13, and a first display unit 14. The main circuit 11 supplies welding power to the welding wire 60 held by the torch 50. The main circuit 11 includes a transformer, a power switch, etc. not shown. In the example shown in this embodiment, the positive terminal is connected to the welding wire 60 via the wire feeding device 30, and the negative terminal is connected to the base material W via the ground wire 41.

[0026] The first control unit 12 is composed of a CPU (Central Processing Unit), an MCU (MicroController Unit), or a combination thereof. In addition, the first control unit 12 may be composed of multiple CPUs or MCUs or a combination thereof.

[0027] The first control unit 12 reads the welding program pre-stored in the first storage unit 13 based on the input content from the first display 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 display unit 14 or the remote controller 20.

[0028] 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 a welding program and a welding condition table required for executing the program. In addition, in the first storage unit 13, a group of multiple welding parameters corresponding to the type of the workpiece W to be welded is stored in a table form, and this group of welding parameters is called a welding condition table. Furthermore, the first storage unit 13 can also temporarily store the input content from the remote controller 20, and when the first display unit 14 functions as an input unit, temporarily store the input content from the first display unit 14.

[0029] The type of the workpiece W is classified according to the material of the workpiece W, the welding method (DC or pulse), and the diameter of the welding wire 60 (hereinafter sometimes referred to as the wire diameter). In addition, the type of the workpiece W is also classified according to the shape of the workpiece W and the plate thickness of the workpiece W. In addition, when a shielding gas is blown from a gas supply pipe (not shown) provided in the welding cable 40 to the welding part, the type of the workpiece W is also classified according to the type of the shielding gas.

[0030] The main welding parameters in this embodiment are the welding current flowing from the main circuit 11 to 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 of the wire feeding device 30, and the welding speed. In addition, when using a shielding gas, the flow rate of the shielding gas is also included in the welding parameters.

[0031] Here, the welding speed refers to the moving speed when the welder moves the torch 50 along the welding line in the workpiece W. In addition, the welding line is an imaginary line on the surface of the workpiece W, and after manual welding, a weld bead (not shown) is formed along the welding line on the surface of the workpiece W.

[0032] The first display unit 14 is composed of a display device such as a liquid crystal display. The first display unit 14 displays the welding conditions retrieved from the first storage unit 13, the newly generated welding conditions, and the respective parameters during welding, etc. In addition, as described later, sometimes the first display unit 14 functions as an input unit. In view of this, the first display unit 14 is preferably composed of a touch panel 14a. In addition, in order to make the first display unit 14 function as an input unit, operation buttons, jog dials, etc. (not shown) may be further provided.

[0033] The remote controller 20 has at least a second input unit 21 and a second control unit 22. Usually, the welder holds the remote controller 20 and operates it manually.

[0034] The second input unit 21 includes a touch panel 21a. As will be described later, the touch panel 21a also functions as a display unit. In addition, operation buttons, jog dials, etc. (not shown) are provided in the second input unit 21.

[0035] The welding operator operates the second input unit 21 to select a desired welding condition table from the multiple welding condition tables stored in the first storage unit 13. The selected welding condition table is retrieved by the first control unit 12. In addition, each welding parameter is newly input from the second input unit 21, and a welding condition table is newly generated. The generated welding condition table is stored in the first storage unit 13. In addition, as will be described later, when correcting each welding parameter described in the first welding condition table (hereinafter referred to as the first welding condition table) after retrieving one welding condition table corresponding to the type of workpiece W from the first storage unit 13, the welding operator also operates the second input unit 21.

[0036] In addition, it is configured such that the values of each welding parameter of the welding condition table selected by operating the second input unit 21 and the values of each welding parameter input by operating the second input unit 21 are displayed in real time. Thereby, the welding operator can confirm the input content and change the welding conditions, etc. In addition, as described above, preferably, the touch panel 21a of the second input unit 21 functions as a display unit to display the values of the welding parameters.

[0037] The second control unit 22, like the first control unit 12, is composed of a CPU or an MCU or a combination thereof. The second control unit 22 sends the content input by the welding operator operating the second input unit 21, such as the change values of the welding voltage and welding current, to the first control unit 12 of the welding power source 10. In addition, the remote controller 20 receives the welding conditions in use, etc. from the first control unit 12 of the welding power source 10 and causes the touch panel 21a of the second input unit 21 to display the content. In addition, the second control unit 22 sends 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 retrieves the input content from the first storage unit 13.

[0038] In addition, in Figure 1In 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 feeding device 30, but it 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 branch in the middle and be 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 wirelessly with each other. In this case, the first signal line 31 and the second signal line 32 are omitted. In addition, communication units (not shown) may be provided in the welding power source 10 and the remote controller 20 for mutual communication.

[0039] 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, etc., and a first storage unit 13, and can also be understood as a kind of computer system. In addition, in the following description, the function blocks having the execution numerical operation function and the numerical correction function shown later in the function blocks respectively included in the first control unit 12 and the second control unit 22 are respectively referred to as the first operation unit 12a and the second operation unit 22a.

[0040] Based on the wire feeding instruction from the welding power source 10 or the remote controller 20, the wire feeding device 30 feeds the welding wire 60 toward the base material W. In addition, a so-called reverse feeding operation of feeding the welding wire 60 away from the base material W may also be performed.

[0041] The welding cable 40 is a composite cable formed by integrating the feeding pipe (not shown) of the welding wire 60 and the supply pipe (not shown) of the shielding gas.

[0042] The torch 50 is manually operated by the welding operator, and feeds the welding wire 60 held by the torch 50 toward the workpiece W. Given welding power is supplied to the welding wire 60, and the front end of the molten welding wire 60 is transferred to the workpiece W, and welding is sequentially advanced. In addition, the shielding gas is blown from the welding cable 40 to the welding part.

[0043] In addition, in the present embodiment, a so-called consumable electrode type arc welding device that melts the welding wire 60 and transfers it to the workpiece W has been described, but the arc welding device 70 may also be a non-consumable electrode type arc welding device.

[0044] [Welding condition correction step]

[0045] Figure 2 It is a flowchart showing the welding condition correction step. Figure 3 It is a schematic diagram of the display screen of the remote controller during the first speed measurement process. In addition, for the sake of easy explanation, in Figure 3In the remote controller 20 shown, illustrations of components other than the touch panel 21a are omitted.

[0046] As described above, depending on the proficiency of the welding operator, particularly the proficiency in operating the welding torch 50, even if a welding condition table suitable for the welded workpiece W is selected, the desired welding speed may not be obtained. As a result, a weld bead of the desired shape cannot be obtained.

[0047] Therefore, in the present embodiment, the following method is proposed: First, the skill of the welding operator is evaluated. Based on the evaluation result, when welding conditions need to be corrected, correction is performed to set a welding condition table for the welded workpiece W. Hereinafter, a detailed description will be given with reference to the drawings.

[0048] First, the welding operator operates the second input unit 21 to call out the welding condition correction program stored in the first storage unit 13 and start it (step S1). Further, a first welding condition table is called out as an appropriate welding condition table corresponding to the type of the workpiece W. In addition, the welding speed described in the first welding condition table, that is, the first welding speed, is confirmed (step S2). In this case, each welding parameter of the first welding condition table including the first welding speed is displayed on the touch panel 21a of the second input unit 21.

[0049] Next, a first speed measurement process is performed. This process is a loop process and repeatedly performs steps S3 and S4 shown below m times (m is an integer of 1 or more).

[0050] The welding operator moves his or her finger along the surface of the touch panel 21a (step S3). In this case, the movement trajectory of the finger is detected by the touch panel 21a, and the movement distance of the finger can be obtained based on this trajectory. Therefore, in the second arithmetic unit 22a, the movement speed of the finger, that is, the first speed, is calculated by dividing the movement distance by the time required for the movement (step S4; first step). Alternatively, in step S4, the movement distance and movement time of the finger may be transmitted from the remote controller 20 to the welding power source 10, and the first speed may be calculated by the first arithmetic unit 12a.

[0051] In addition, the value of m can be appropriately changed according to the proficiency of the welding operator. For example, if the welding operator is a beginner, the value of m may sometimes be 10 or more. On the other hand, if the welding operator is an experienced person to a certain extent, the value of m can also be set to about 1 to 3. The value of m can be preset by the welding condition correction program or determined on the spot by the welding operator.

[0052] Before or after performing the first speed measurement process, the message shown is displayed on the touch panel 21a. Figure 3 shown message.

[0053] First, before performing step S3, as shown on the left side of Figure 3 , a message such as "Please draw on the touch panel." is displayed on the touch panel 21a. In addition, after performing the first speed measurement process, as shown on the right side of Figure 3 , a message such as "Measurement result: 〇〇 cm / min. Do you want to correct the welding conditions with the measurement content?" is displayed on the touch panel 21a. The latter message is displayed on the touch panel 21a after repeating steps S3 and S4 m times. However, it is not limited thereto, and it may also be displayed on the touch panel 21a each time step S4 is performed.

[0054] After performing the first speed measurement process, proceed to step S5 to determine whether the difference between the first welding speed and the first speed is within a given range. The determination in step S5 is performed by the second arithmetic unit 22a or the first arithmetic unit 12a. However, the welder may also perform the calculation himself / herself to perform the determination operation in step S5.

[0055] In addition, if the first speed is calculated each time step S4 is performed, m first speeds are obtained. In this case, in step S5, the difference between the average value of the m first speeds and the first welding speed can be evaluated, or the value with the largest difference from the first welding speed among the m first speeds can be used as the evaluation object in step S5.

[0056] Furthermore, in the present embodiment, when the first welding speed is set to V and the first speed is set to V1, when their difference is within a given range, for example, the relationship shown in formula (1) is satisfied.

[0057] 0 ≤ 100×(|V - V1| / V) ≤ A…(1)

[0058] Here, 0 ≤ A ≤ 3, but the range of A is not particularly limited thereto and can be changed appropriately.

[0059] If the determination result in step S5 is negative, that is, if the difference between the first welding speed and the first speed exceeds the given range, the first arithmetic unit 12a or the second arithmetic unit 22a corrects each welding parameter described in the first condition table based on this difference and generates a new welding condition table (step S6; second step). The generated new welding condition table is used to weld the workpiece W.

[0060] Specifically, in step S6, a new welding condition table is generated using the multiple welding condition tables related to the workpiece W of the same type as the first welding condition table stored in the first storage unit 13.

[0061] In addition, in the new welding condition table, the welding speeds in multiple welding condition tables are interpolated to generate a welding speed such that the difference from the first welding speed falls within a given range.

[0062] Welding parameters other than the welding speed, i.e., other welding parameters, are generated by interpolating the other welding parameters in multiple welding condition tables based on the interpolation coefficients obtained from the aforementioned interpolation process.

[0063] In addition, the interpolation method in this case is linear interpolation. However, it is not limited to this, and it can also be generated by higher-order interpolation processing.

[0064] On the other hand, when the determination result in step S5 is affirmative, that is, when the difference between the first welding speed and the first speed is within a given range or less, the operation can be ended without correcting the welding speed. In this case, the other welding parameters are also not changed, and the first welding condition table is directly used to weld the workpiece W.

[0065] However, sometimes a second welding condition table is stored in the first storage unit 13. This second welding condition table describes welding conditions related to the same type of workpiece W, that is, a welding speed whose difference from the first welding speed is within a given range or less. In this case, the first arithmetic unit 12a or the second arithmetic unit 22a replaces the first welding condition table with the second welding condition table (step S7; third step). The replaced second welding condition table is used to weld the workpiece W.

[0066] In addition, in the present embodiment, the first speed is calculated by the welding operator tracing the surface of the touch panel 21a with a finger. However, a torch 50 or a training tool for the simulation torch 50 can also be used, and the first speed can be calculated by tracing the surface of the touch panel 21a with their tips. That is, what is detected by the touch panel 21a is the movement trajectory of the hand when the welding operator moves the hand in accordance with the first welding speed. The first arithmetic unit 12a or the second arithmetic unit 22a calculates the moving distance of the hand based on this movement trajectory. In addition, the first arithmetic unit 12a or the second arithmetic unit 22a calculates the first speed based on the time required for the movement and the moving distance of the hand. In this case, in order not to damage the surface of the touch panel 21a, it is preferable to install a protective member at the tip portion.

[0067] In addition, the touch panel 21a is not limited to a contact type touch panel such as a pressure-sensitive type, and can also be a non-contact type touch panel such as an electrostatic capacitance method or an optical detection method. In this case, it is possible to omit installing a protective member at the tip of the torch 50 or the training tool.

[0068] [Effects, etc.]

[0069] As described above, the arc welding apparatus 70 according to the present embodiment includes at least a welding power source 10, a remote controller 20, and a torch 50.

[0070] The welding power source 10 includes at least a main circuit 11, a first control unit 12, a first storage unit 13, and a first display unit 14. The first control unit 12 includes a first arithmetic unit 12a.

[0071] The remote controller 20 includes at least a second input unit 21 and a second control unit 22. The second control unit 22 includes a second arithmetic unit 22a. The second input unit 21 includes a touch panel 21a.

[0072] The first storage unit 13 stores a plurality of welding condition tables for a plurality of workpieces W respectively.

[0073] The first arithmetic unit 12a or the second arithmetic unit 22a calculates a first speed based on the moving distance of the hand detected by the touch panel as the welding operator moves his own hand along the surface 21a of the touch panel. The first arithmetic unit 12a or the second arithmetic unit 22a reads out a first welding condition table from the plurality of welding condition tables corresponding to the workpiece W to be welded from the first storage unit 13.

[0074] When the difference between the first welding speed described in the first welding condition table and the first speed exceeds a given range, the first arithmetic unit 12a or the second arithmetic unit 22a corrects the welding parameters described in the first welding condition table according to the difference.

[0075] When performing an actual welding operation, whether the torch 50 can be moved so that the welding speed becomes the target value varies depending on the skill and experience of the welding operator. Therefore, even if a beginner or a welding operator with insufficient work experience moves the torch 50 as the target value, the actual moving speed sometimes deviates significantly from the target value.

[0076] However, in the arc welding apparatus with the conventional structure, it is difficult to grasp the deviation amount between the target value and the actual moving speed of the torch 50, and even if there is a large deviation between the two, it is difficult to correct it.

[0077] On the other hand, according to the present embodiment, by moving the welding operator's own finger, the torch 50, etc. along the surface of the touch panel 21a, it is possible to quantitatively evaluate whether the welding operator can move the torch 50 at a speed such as the target value. In addition, since this speed corresponds to the welding speed of the workpiece W, the welding operator can actually feel the degree of the difference between the first welding speed as the target value and the first speed as the actual movement speed of the welding operator.

[0078] Furthermore, according to the present embodiment, by quantifying the difference between the first welding speed and the first speed, it is possible to appropriately correct the welding speed and other welding parameters based on this difference. Thus, even when the welder moves the torch 50 at a speed different from the target value to weld the workpiece W, a weld bead having a desired shape or a shape close thereto can be obtained. In addition, the appearance of the weld bead can be suppressed from deteriorating.

[0079] In addition, the first speed may also be the moving speed of the welder's finger when the finger moves along the surface of the touch panel 21a. Further, the moving speed of the tip of the torch 50 or a training tool imitating the torch 50 when it moves along the surface of the touch panel 21a may also be the first speed.

[0080] In addition, as a method for correcting the welding parameters, it is preferable to use the aforementioned interpolation process.

[0081] That is, when there is no welding condition table in the first storage unit 13 that describes a welding speed whose difference from the first welding speed is within a given range among the plurality of welding condition tables related to the same type of workpiece W, the first arithmetic unit 12a or the second arithmetic unit 22a performs the following processing.

[0082] The first arithmetic unit 12a or the second arithmetic unit 22a uses the plurality of welding condition tables stored in the first storage unit 13 to generate a new welding condition table for welding the workpiece W.

[0083] In this new welding condition table, interpolation processing is performed on the welding speeds in the plurality of welding condition tables to generate a welding speed such that the difference from the first welding speed is within a given range.

[0084] In addition, other welding parameters, which are welding parameters other than the welding speed, are generated by performing interpolation processing on the other welding parameters in the plurality of welding condition tables based on the interpolation coefficients obtained in the aforementioned interpolation processing.

[0085] In this way, by using the plurality of welding condition tables that have already been obtained for the same type of workpiece W to correct each welding parameter, the arithmetic processing for correction can be simplified. In addition, since other welding parameters are also corrected based on the interpolation coefficients used in the correction of the welding speed, the possibility that each welding parameter in the corrected new welding condition table becomes a value that significantly deviates from the actual use conditions is small. That is, even when the welding parameters are corrected to match the actual movement speed of the welder, each welding parameter can be set to an appropriate value that can be actually used.

[0086] In addition, when the second welding condition table exists among the plurality of welding condition tables stored in the first storage unit 13 and related to the workpieces W of the same type, the first arithmetic unit 12a or the second arithmetic unit 22a preferably performs the following processing.

[0087] That is, the first arithmetic unit 12a or the second arithmetic unit 22a reads the second welding condition table from the first storage unit 13 and sets it as a new welding condition table for welding the workpiece W. In addition, the welding speed whose difference from the first welding speed is within a given range is described in the second welding condition table.

[0088] Thereby, the arithmetic processing for correction can be omitted, and the arithmetic load on the first arithmetic unit 12a or the second arithmetic unit 22a can be reduced. In addition, since the already obtained second welding condition table is used, appropriate welding can be performed without deteriorating the shape of the weld bead or the like.

[0089] In addition, according to the present embodiment, by having a plurality of welding operators perform Figure 2 the respective steps shown, the degree of deviation of the first speed of each welding operator, in other words, the degree of deviation of the work, can be quantified. Thereby, the proficiency of the work can be appropriately grasped for each welding operator.

[0090] The welding condition correction method according to the present embodiment includes at least: a first step ( Figure 2 step S4), calculating the first speed; and a second step ( Figure 2 step S6), when the difference between the first welding speed described in the first welding condition table corresponding to the workpiece W to be welded and the first speed exceeds a given range, correcting the welding parameters described in the first welding condition table according to the difference.

[0091] According to the present embodiment, by quantifying the difference between the first welding speed and the first speed, the proficiency of the work of the welding operator can be appropriately grasped.

[0092] In addition, according to the present embodiment, by quantifying the difference between the first welding speed and the first speed, the welding speed and other welding parameters can be appropriately corrected according to the difference. Thus, even when the welding operator moves the torch 50 at a speed different from the target value to weld the workpiece W, a weld bead having a desired shape or a shape close thereto can be obtained. In addition, the appearance of the weld bead can be suppressed from deteriorating.

[0093] In addition, according to the present embodiment, by Figure 2 performing the first speed measurement process in the flowchart shown Figure 2Steps S3 and S4) are executed m times (m is an integer of 1 or more), and it can also have a training effect of enabling the welding operator to develop a feeling of moving the torch 50 at a speed that conforms to the target value. In particular, by setting the value of m according to the proficiency of the welding operator, it can become a more appropriate training.

[0094] When there is no welding condition table in the first storage unit 13 that describes a welding speed whose difference from the first welding speed is within a given range among the multiple welding condition tables related to the same type of workpiece W, in the second step, the multiple welding condition tables stored in the first storage unit 13 are used to generate a new welding condition table for welding the workpiece W.

[0095] In this new welding condition table, interpolation processing is performed on the welding speeds in the multiple welding condition tables to generate a welding speed such that its difference from the first welding speed is within a given range.

[0096] In addition, other welding parameters, which are welding parameters other than the welding speed, are generated by performing interpolation processing on the other welding parameters in the multiple welding condition tables based on the interpolation coefficients obtained in the aforementioned interpolation processing.

[0097] Thereby, the calibration process can be simplified. In addition, when the welding parameters are calibrated to match the actual movement speed of the welding operator, that is, the first speed, each welding parameter can also be set to an appropriate value that can actually be used.

[0098] In addition, preferably, when there is a second welding condition table in the multiple welding condition tables stored in the first storage unit 13 and related to the same type of workpiece W, instead of the second step, there is also a third step of setting the second welding condition table as the new welding condition table for welding the workpiece W ( Figure 2 step S7). In addition, the second welding condition table describes a welding speed whose difference from the first welding speed is within a given range.

[0099] Thereby, the arithmetic processing for calibration can be omitted. In addition, since the already obtained second welding condition table is used, appropriate welding can be performed without deteriorating the shape of the weld bead or the like.

[0100] The welding operation training program according to the present embodiment causes a computer system having one or more processors to at least execute the first step and the second step in the aforementioned welding condition calibration method ( Figure 2 step S4 and step S6) or the first step and the third step ( Figure 2Steps S4 and S7). Additionally, the computer system in this embodiment includes at least the first arithmetic unit 12a or the second arithmetic unit 22a or both, and more preferably includes the first display unit 14 and the second input unit 21.

[0101] By setting the execution steps of the welding condition correction method as a program in this way, the welding operator can easily and efficiently correct the welding parameters.

[0102] (Other embodiments)

[0103] In the embodiment, an example is shown in which the welding operator calculates the first speed by moving his or her finger, the welding torch 50, etc. along the surface of the touch panel 21a of the remote controller 20.

[0104] However, it is not particularly limited thereto. As Figure 4 shown, the first speed can also be calculated by moving his or her finger, the welding torch 50, etc. along the surface of the touch panel 14a of the first display unit 14 provided on the welding power source 10. In this case, the first display unit 14 also functions as an input unit. In addition, the touch panel 14a can be either a contact type or a non-contact type.

[0105] Additionally, even in the Figure 4 shown case, the remote controller 20 can have the first speed measurement function. That is, in order to measure the first speed according to the selection of the welding operator, the touch panel 14a of the first display unit (input unit) 14 can be used, or the touch panel 21a of the second input unit 21 can be used.

[0106] Furthermore, in the embodiment, the first storage unit 13 is provided in the welding power source 10, but the storage destination of the welding condition correction program and the welding condition table is not particularly limited thereto. For example, instead of providing the first storage unit 13 in the welding power source 10, an external memory can be connected to the welding power source 10, and this external memory can be used as the storage destination for the welding condition correction program, the welding condition table, etc. The external memory can be, for example, an SD (registered trademark) card, a USB (trademark) memory, or a server configured to be able to communicate with the welding power source 10.

[0107] Industrial applicability

[0108] The arc welding device of the present disclosure can appropriately correct the welding parameters according to the proficiency of the welding operator, and is thus useful.

[0109] Explanation of reference numerals

[0110] 10 Welding power source

[0111] 11 Main circuit

[0112] 12 Control unit

[0113] 12a First arithmetic unit (arithmetic unit)

[0114] 13 First storage unit (storage unit)

[0115] 14 First display unit (input unit)

[0116] 14a Touch panel

[0117] 20 Remote controller

[0118] 21 Second input unit

[0119] 21a Touch panel

[0120] 22 Second control unit

[0121] 22a Second arithmetic unit (arithmetic unit)

[0122] 30 Wire feeder

[0123] 31 First signal line

[0124] 32 Second signal line

[0125] 40 Welding cable

[0126] 41 Grounding wire

[0127] 50 Torch

[0128] 60 Welding wire

[0129] 70 Arc welding device

[0130] W Workpiece.

Claims

1. An arc welding device includes at least an input unit, a storage unit, an arithmetic unit, a welding power source, and a torch. The input unit includes a touch panel. The storage unit stores a plurality of welding condition tables for each of a plurality of types of workpieces. The arithmetic unit calculates a first speed based on the moving distance of the hand detected by the touch panel when the welder moves his own hand along the surface of the touch panel. The first welding condition table among the plurality of welding condition tables corresponding to the workpiece to be welded is read out from the storage unit. When the difference between the first welding speed described in the first welding condition table and the first speed exceeds a given range, the arithmetic unit corrects the welding parameters described in the first welding condition table according to the difference.

2. The arc welding device according to claim 1, wherein when there is no welding condition table stored in the storage unit and describing a welding speed with a difference from the first welding speed within the given range among the plurality of welding condition tables related to the same type of workpiece, the arithmetic unit uses the plurality of welding condition tables stored in the storage unit to generate a new welding condition table for welding the workpiece. In the new welding condition table, interpolation processing is performed on the welding speeds in the plurality of welding condition tables so that the difference from the first welding speed is within the given range, thereby generating the welding speed. Other welding parameters, i.e., welding parameters other than the welding speed, are generated by performing interpolation processing on the other welding parameters in the plurality of welding condition tables based on the interpolation coefficients obtained by the interpolation processing.

3. The arc welding device according to claim 1, wherein when there is a second welding condition table stored in the storage unit and describing a welding speed with a difference from the first welding speed within the given range among the plurality of welding condition tables related to the same type of workpiece, the arithmetic unit reads out the second welding condition table from the storage unit and sets it as a new welding condition table for welding the workpiece.

4. The arc welding device according to claim 1, wherein The first speed is the moving speed of the finger when the welder moves his own finger along the surface of the touch panel.

5. The arc welding device according to claim 1, wherein The first speed is the moving speed of the tip of the torch when the welder moves the tip of the torch along the surface of the touch panel.

6. A welding condition correction method using the arc welding device according to claim 1. In the first step, the first speed when the welder moves his own hand along the surface of the touch panel is calculated. In the second step, when the difference between the first welding speed and the first speed exceeds the given range, the welding parameters described in the first welding condition table are corrected according to the difference.

7. The welding condition correction method according to claim 6, wherein, when there is no welding condition table stored in the storage unit and describing a welding speed with a difference from the first welding speed within the given range among a plurality of welding condition tables related to the same type of workpiece, in the second step, a new welding condition table for welding the workpiece is generated using a plurality of welding condition tables stored in the storage unit, in the new welding condition table, interpolation processing is performed on the welding speeds in the plurality of welding condition tables so that the difference from the first welding speed is within the given range to generate the welding speed, the welding parameters other than the welding speed, i.e., other welding parameters, are generated by performing interpolation processing on the other welding parameters in the plurality of welding condition tables based on the interpolation coefficients obtained by the interpolation processing.

8. The welding condition correction method according to claim 6, wherein, a third step is further provided. When there is a second welding condition table among a plurality of welding condition tables related to the same type of workpiece, instead of the second step, the second welding condition table is set as the new welding condition table for welding the workpiece, where the second welding condition table is the welding condition table stored in the storage unit and describes a welding speed with a difference from the first welding speed within the given range.

9. A welding condition correction program for causing a computer system having one or more processors to execute each step in the welding condition correction method according to any one of claims 6 to 8.

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