WO2024171561A1

WO2024171561A1 - Arc welding device and welding condition correction method using same, and welding condition correction program

Info

Publication number: WO2024171561A1
Application number: PCT/JP2023/043422
Authority: WO
Inventors: 英嗣本田; 英樹井原; 博于; 拓也定塚; 徹也森川
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2023-02-17
Filing date: 2023-12-05
Publication date: 2024-08-22

Abstract

This arc welding device (70) comprises a welding power supply (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 the 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 moving speed of a welder's hand; and when the difference between a first welding speed and the first speed in a first welding condition table read from the first storage unit (13) exceeds a predetermined range, corrects each welding parameter of the first welding condition table according to the difference.

Description

ARC WELDING APPARATUS, METHOD FOR CORRECTING WELDING CONDITIONS USING THE APPARATUS, AND PROGRAM FOR CORRECTING WELDING CONDITIONS

This disclosure relates to an arc welding device, a welding condition correction method using the same, and a welding condition correction program.

Traditionally, so-called manual welding, in which a welding worker holds a welding torch or the like in his or her hand and welds the workpiece, has been widely used.

On the other hand, the quality of manual welding depends heavily on the skill of the welder, so it is necessary to provide the welder with sufficient training in welding work, and various training methods have been proposed.

For example, Patent Document 1 discloses a simulation system that simulates the operation of a welding torch by a welding worker. Specifically, this 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 welded area. The computer device sets the work content and work conditions. The tracking controller 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 in three dimensions when the welding worker holds and operates the welding torch in his or her hand. Based on the work content and 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, the simulation system simulates in real time a work situation that is visually identical to that when a welding worker is performing welding work using a welding torch, with the position of the tip of the welding torch as the reference.

In this way, it is possible to perform simulations suited to complex work that requires judging the quality of the welding results, including the appearance of multiple conditions during the welding work.

JP 2015-225214 A

In manual welding, the welding speed corresponds to the speed at which the welder moves the welding torch along the intended welding location on the workpiece.

However, moving the welding torch at a constant speed along the intended welding area is a difficult task for beginners. For this reason, when a beginner performs manual welding, the speed at which the welding torch moves can vary or deviate from the target value.

However, fluctuations in the welding speed affect the actual values of the welding current and welding voltage. As a result, the actual values of the welding current and welding voltage during welding may deviate from the values set before welding begins for performing the desired weld. This may also cause the shape of the weld bead formed on the workpiece to differ from the desired shape. There is also a risk of the appearance of the weld bead deteriorating.

This disclosure has been made in consideration of these points, and its purpose is to provide an arc welding device that can appropriately correct welding conditions, specifically welding parameters, according to the proficiency of the welding operator, as well as a welding condition correction method and welding condition correction program using the same.

In order to achieve the above object, the arc welding device according to the present disclosure is an arc welding device including at least an input unit, a memory unit, a calculation unit, a welding power source, and a welding torch, the input unit including a touch panel, the memory unit storing a plurality of welding condition tables for each of a plurality of types of workpieces, the calculation unit calculating a first speed based on the distance of movement of the hand detected by the touch panel when a welding operator moves his/her hand along the surface of the touch panel, reading out from the memory unit a first welding condition table out of the plurality of welding condition tables corresponding to the workpiece to be welded, and when the difference between the first welding speed described in the first welding condition table and the first speed exceeds a predetermined range, the calculation unit corrects the welding parameters described in the first welding condition table in accordance with the difference.

The welding condition correction method disclosed herein is a welding condition correction method using the arc welding device, and is characterized in that a first step calculates the first speed when the welding operator moves his/her hand along the surface of the touch panel, and a second step corrects the welding parameters described in the first welding condition table in accordance with the difference when the difference between the first welding speed and the first speed exceeds the predetermined range.

The welding condition correction program disclosed herein is characterized in that each step in the welding condition correction method is executed by a computer system having one or more processors.

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 in operating the welding torch can be quantitatively understood.

1 is a schematic configuration diagram of an arc welding device according to an embodiment; 10 is a flowchart showing a welding condition correction procedure. 13 is a schematic diagram showing a display screen of the remote controller during a first speed measurement process. FIG. FIG. 13 is a schematic diagram showing a display screen of the welding power source during a first speed measurement process.

Below, an embodiment of the present disclosure will be described with reference to the drawings. Note that the following description of the preferred embodiment is essentially merely exemplary and is not intended to limit the present disclosure, its applications, or its uses.

(Embodiment)
[Configuration of Arc Welding Equipment]
FIG. 1 is a schematic diagram of an arc welding apparatus according to an embodiment of the present invention. An arc welding apparatus 70 includes a welding power source 10, a remote controller 20, a wire feeder 30, and a welding torch 50.

The welding power source 10 has at least a main circuit 11 that generates welding power, a first control unit 12, a first memory unit 13, and a first display unit 14. The main circuit 11 supplies welding power to a welding wire 60 held by a welding torch 50. The main circuit 11 has a transformer and a power switch (not shown), and in the example shown in this embodiment, the positive terminal is connected to the welding wire 60 via the wire feeder 30, and the negative terminal is connected to the base material W via an earth wire 41.

The first control unit 12 is configured with a CPU (Central Processing Unit) or an MCU (Micro Controller Unit), or a combination of these. Note that the first control unit 12 may be configured with multiple CPUs or MCUs, or a combination of these.

The first control unit 12 reads out a welding program stored in advance in the first storage unit 13 based on the input 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 wire feeding commands to the wire feeder 30 based on the input from the first display unit 14 or the remote controller 20.

The first memory unit 13 is composed of a semiconductor memory, such as a RAM (Random Access Memory) or SSD (Solid State Drive). The first memory unit 13 stores a welding program and a welding condition table required to execute the program. The first memory unit 13 stores a set of multiple welding parameters in table format according to the type of workpiece W to be welded, and the set of welding parameters is called a welding condition table. The first memory unit 13 may also temporarily store the input contents from the remote controller 20, and, if the first display unit 14 functions as an input unit, the input contents from the first display unit 14.

The type of 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). The type of 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 sprayed onto the welding point from a gas supply pipe (not shown) provided on the welding cable 40, the type of workpiece W is also classified according to the type of shielding gas.

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 by the wire feeder 30, and the welding speed. When a shielding gas is used, the flow rate of the shielding gas is also included in the welding parameters.

Here, the welding speed refers to the speed at which the welding operator moves the welding torch 50 along the weld line on the workpiece W. Note that the weld line is an imaginary line on the surface of the workpiece W, and after manual welding, a weld bead (not shown) is formed on the surface of the workpiece W along the weld line.

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 called up from the first storage unit 13, newly generated welding conditions, and various parameters during welding. As will be described later, the first display unit 14 may function as an input unit. In light of this, it is preferable that the first display unit 14 is composed of a touch panel 14a. Furthermore, in order to make the first display unit 14 function as an input unit, operation buttons, a jog dial, etc. (not shown) may be further provided.

The remote controller 20 has at least a second input unit 21 and a second control unit 22. Typically, a welding operator holds the remote controller 20 in his/her hand and operates it manually.

The second input unit 21 includes a touch panel 21a. As described later, this touch panel 21a also functions as a display unit. The second input unit 21 is also provided with operation buttons, a jog dial, etc., which are not shown.

The welding operator operates the second input unit 21 to select a desired welding condition table from among the multiple welding condition tables stored in the first memory unit 13. The selected welding condition table is called up to the first control unit 12. Furthermore, new welding parameters are input from the second input unit 21 to generate a new welding condition table. The generated welding condition table is stored in the first memory unit 13. Furthermore, as will be described later, the welding operator also operates the second input unit 21 when correcting each welding parameter described in the first welding condition table after calling up one welding condition table (hereinafter referred to as the first welding condition table) corresponding to the type of workpiece W from the first memory unit 13.

The values of each welding parameter in the welding condition table selected by operating the second input unit 21 and the values of each welding parameter entered by operating the second input unit 21 are configured to be displayed in real time. This allows the welding operator to change the welding conditions while checking the input contents. As described above, it is preferable that the touch panel 21a of the second input unit 21 functions as a display unit and displays the values of the welding parameters.

The second control unit 22, like the first control unit 12, is configured with a CPU or MCU or a combination of these. The second control unit 22 transmits the contents input by the welding operator by operating the second input unit 21, such as changes to the welding voltage and welding current, to the first control unit 12 of the welding power source 10. The remote controller 20 also receives the welding conditions being used, etc. from the first control unit 12 of the welding power source 10, and displays these contents on the touch panel 21a of the second input unit 21. The second control unit 22 also transmits the contents input to the second input unit 21 to the first memory unit 13 of the welding power source 10, and the first control unit 12 calls up the input contents from the first memory unit 13.

1, 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 is not limited to this example. For example, the welding cable 40 and the first signal line 31 may be integrated, and the first signal line 31 may branch off from 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 wirelessly communicate with each other. In that 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.

As explained above, the welding power source 10 or the combination of the welding power source 10 and the remote controller 20 includes a CPU or MCU, etc., and the first memory unit 13, and can be considered as a type of computer system. Furthermore, in the following explanation, among the functional blocks possessed by the first control unit 12 and the second control unit 22, the functional blocks that execute the numerical calculation function and the numerical correction function described later may be referred to as the first calculation unit 12a and the second calculation unit 22a, respectively.

The wire feeder 30 feeds the welding wire 60 toward the base material W based on a wire feed command from the welding power source 10 or the remote controller 20. Note that the wire feeder 30 may also perform a so-called reverse feed operation, which feeds the welding wire 60 away from the base material W.

The welding cable 40 is a composite cable that integrates a supply pipe (not shown) for the welding wire 60 and a supply pipe for the shielding gas (not shown).

The welding torch 50 is manually operated by the welding operator, and the welding wire 60 held by the welding torch 50 is fed toward the workpiece W. A predetermined welding power is supplied to the welding wire 60, and the tip of the molten welding wire 60 is transferred to the workpiece W, and the welding progresses sequentially. In addition, shielding gas is sprayed from the welding cable 40 onto the welding point.

In this 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, but the arc welding device 70 may also be a non-consumable electrode type arc welding device.

[Welding condition correction procedure]
Fig. 2 is a flow chart showing the welding condition correction procedure, and Fig. 3 is a schematic diagram showing a display screen of the remote controller during the first speed measurement process. For convenience of explanation, in the remote controller 20 shown in Fig. 3, components other than the touch panel 21a are omitted from the illustration.

As mentioned above, depending on the skill of the welding operator, particularly the skill in operating the welding torch 50, even if an appropriate welding condition table is selected for welding the workpiece W, the desired welding speed may not be obtained, and as a result, a weld bead of the desired shape may not be obtained.

In this embodiment, we propose a method in which the skill of the welding worker is first evaluated, and if the welding conditions need to be corrected based on the results of the evaluation, the corrections are made and the welding conditions are set as the tail for welding the workpiece W. Details are explained below with reference to the drawings.

First, the welding operator operates the second input unit 21 to call up and start the welding condition correction program stored in the first storage unit 13 (step S1). Furthermore, the welding operator calls up the first welding condition table as an appropriate welding condition table according to the type of 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.

Next, the first speed measurement process is performed. This process is a loop process, and steps S3 and S4 shown below are repeated m times (m is an integer equal to or greater than 1).

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

The value of m can be changed as appropriate depending on the skill level of the welding operator. For example, if the welding operator is a beginner, the value of m may be 10 or more. On the other hand, if the welding operator has some experience, the value of m may be about 1 to 3. The value of m may be preset in the welding condition correction program, or may be determined on the spot by the welding operator.

Before and after the first speed measurement process is executed, the message shown in Figure 3 is displayed on the touch panel 21a.

First, before step S3 is executed, as shown on the left side of Fig. 3, a message saying "Please trace the touch panel" is displayed on the touch panel 21a. After the first speed measurement process is executed, as shown on the right side of Fig. 3, a message saying "Measurement result: xx cm/min. Would you like to correct the welding conditions based on the measurement?" is displayed on the touch panel 21a. The latter message is displayed on the touch panel 21a after steps S3 and S4 are repeated m times. However, this is not limited to the above, and the message may be displayed on the touch panel 21a every time step S4 is executed.

After the first speed measurement process is performed, the process proceeds to step S5, where it is determined whether the difference between the first welding speed and the first speed is within a predetermined range. The determination in step S5 is performed by the second calculation unit 22a or the first calculation unit 12a. However, the welding operator may perform the calculations and perform the determination task in step S5 by himself.

Note that by calculating the first speed each time step S4 is performed, m first speeds are obtained. In this case, the difference between the average value of the m first speeds and the first welding speed may be evaluated in step S5, or the value of the m first speeds that has the largest difference from the first welding speed may be evaluated in step S5.

In addition, in this embodiment, when the first welding speed is V and the first speed is V1, if the difference between them is within a predetermined range, for example, the relationship shown in formula (1) is satisfied.

0≦100×(|V-V1|/V)≦A...(1)
Here, 0≦A≦3, but the range of A is not particularly limited to this and can be changed as appropriate.

If the result of the determination in step S5 is negative, that is, if the difference between the first welding speed and the first speed exceeds a predetermined range, the first calculation unit 12a or the second calculation unit 22a corrects each welding parameter described in the first condition table according to the difference and generates a new welding condition table (step S6; second step). The workpiece W is welded using the new welding condition table that has been generated.

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

In addition, in the new welding condition table, the welding speed is generated by interpolating the welding speeds in multiple welding condition tables so that the difference from the first welding speed is within a predetermined range.

Other welding parameters, which are welding parameters other than the welding speed, are generated by performing an interpolation process on the other welding parameters in multiple welding condition tables based on the interpolation coefficients obtained by the above-mentioned interpolation process.

In this case, the interpolation method is linear. However, it is not limited to this and may be generated using higher-order interpolation processing.

On the other hand, if the determination result in step S5 is positive, that is, if the difference between the first welding speed and the first speed is within the predetermined range, the work may be ended without correcting the welding speed. In this case, other welding parameters are not changed, and the workpiece W is welded using the first welding condition table as is.

However, a second welding condition table may be stored in the first storage unit 13, which describes welding conditions for the same type of workpiece W and a welding speed whose difference from the first welding speed is within a predetermined range. In this case, the first calculation unit 12a or the second calculation unit 22a replaces the second welding condition table with the first welding condition table (step S7; third step). The workpiece W is welded using the replaced second welding condition table.

In this embodiment, the first speed is calculated by the welding operator tracing the surface of the touch panel 21a with his/her finger. However, the first speed may be calculated by tracing the surface of the touch panel 21a with the tip of a welding torch 50 or a training tool simulating a welding torch 50. In other words, what is detected by the touch panel 21a is the movement trajectory of the hand when the welding operator moves his/her hand to match the first welding speed. Based on the movement trajectory, the first calculation unit 12a or the second calculation unit 22a calculates the movement distance of the hand. Also, based on the time required for the movement and the movement distance of the hand, the first calculation unit 12a or the second calculation unit 22a calculates the first speed. In this case, it is preferable to wear a protective gear on the tip to prevent the surface of the touch panel 21a from being scratched.

Furthermore, the touch panel 21a is not limited to a contact-type touch panel such as a pressure-sensitive type, but may be a non-contact type touch panel such as a capacitance type or an optical detection type. In this case, it may be unnecessary to attach protective equipment to the tip of the welding torch 50 or the training equipment.

[Effects, etc.]
As described above, the arc welding device 70 according to this embodiment includes at least the welding power source 10 , the remote controller 20 , and the welding torch 50 .

The welding power source 10 has at least a main circuit 11, a first control unit 12, a first memory unit 13, and a first display unit 14. The first control unit 12 has a first calculation unit 12a.

The remote controller 20 has at least a second input unit 21 and a second control unit 22. The second control unit 22 has a second calculation unit 22a. The second input unit 21 includes a touch panel 21a.

The first memory unit 13 stores multiple welding condition tables for each of multiple types of workpieces W.

The first calculation unit 12a or the second calculation unit 22a calculates a first speed based on the distance of movement of the hand detected by the touch panel when the welding operator moves his/her hand along the surface 21a of the touch panel. The first calculation unit 12a or the second calculation unit 22a reads out a first welding condition table from the first storage unit 13 out of multiple welding condition tables corresponding to the workpiece W to be welded.

If the difference between the first welding speed and the first speed described in the first welding condition table exceeds a predetermined range, the first calculation unit 12a or the second calculation unit 22a corrects the welding parameters described in the first welding condition table according to the difference.

When performing actual welding work, whether or not the welding torch 50 can be moved so that the welding speed matches the target value varies depending on the skill and experience of the welding worker. For this reason, even if a beginner or a welding worker with insufficient work experience moves the welding torch 50 so that the welding speed matches the target value, the actual movement speed may deviate significantly from the target value.

However, with conventional arc welding devices, it is difficult to grasp the deviation between the target value and the actual movement speed of the welding torch 50, and even if there is a large deviation between the two, it is difficult to correct this.

On the other hand, according to this embodiment, by having the welding operator move his/her finger, the welding torch 50, etc. along the surface of the touch panel 21a, it is possible to quantitatively evaluate whether the welding operator can move the welding torch 50 at a target speed. In addition, since this speed corresponds to the welding speed of the workpiece W, the welding operator can actually feel the extent of the difference between the first welding speed, which is the target value, and the first speed, which is the welding operator's actual operating speed.

Furthermore, according to this embodiment, by quantifying and understanding the difference between the first welding speed and the first speed, the welding speed and other welding parameters can be appropriately corrected in accordance with the difference. As a result, even if the welding operator moves the welding torch 50 at a speed different from the target value to weld the workpiece W, a weld bead having the desired shape or a shape close to the desired shape can be obtained. In addition, deterioration of the appearance of the weld bead can be suppressed.

The first speed may be the speed at which a welding operator moves his/her finger along the surface of the touch panel 21a. The first speed may also be the speed at which the tip of a welding torch 50 or a training tool simulating the same moves along the surface of the touch panel 21a.

In addition, it is preferable to use the interpolation process described above as a method for correcting welding parameters.

In other words, if there is no welding condition table stored in the first memory unit 13 that describes a welding speed whose difference from the first welding speed is within a predetermined range or less among multiple welding condition tables related to the same type of workpiece W, the first calculation unit 12a or the second calculation unit 22a executes the process shown below.

The first calculation unit 12a or the second calculation unit 22a generates a new welding condition table for welding the workpiece W using multiple welding condition tables stored in the first storage unit 13.

In this new welding condition table, the welding speed is generated by interpolating the welding speeds in multiple welding condition tables so that the difference from the first welding speed is within a predetermined range.

Furthermore, other welding parameters other than the welding speed are generated by performing an interpolation process on the other welding parameters in the multiple welding condition tables based on the interpolation coefficients obtained by the above-mentioned interpolation process.

In this way, by correcting each welding parameter using multiple welding condition tables that have already been acquired for the same type of workpiece W, the calculation process for correction can be simplified. Furthermore, because other welding parameters are also corrected based on the interpolation coefficient used when correcting the welding speed, there is little risk that each welding parameter in the new corrected welding condition table will have a value that deviates significantly from the actual use conditions. In other words, even when the welding parameters are corrected to match the actual operating speed of the welding operator, each welding parameter can be made to an appropriate value that can actually be used.

In addition, if a second welding condition table exists among multiple welding condition tables related to the same type of workpiece W stored in the first memory unit 13, it is preferable that the first calculation unit 12a or the second calculation unit 22a executes the process shown below.

In other words, the first calculation unit 12a or the second calculation 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. The second welding condition table describes a welding speed whose difference from the first welding speed is within a predetermined range.

By doing this, the calculation process for correction can be omitted, and the calculation load on the first calculation unit 12a or the second calculation unit 22a can be reduced. In addition, since the second welding condition table that has already been acquired is used, appropriate welding can be performed without deteriorating the shape of the weld bead, etc.

In addition, according to this embodiment, by having multiple welding operators perform each step shown in FIG. 2, the degree of variation in the first speed for each welding operator, in other words, the degree of variation in the work, can be quantified. This makes it possible to appropriately grasp the level of work proficiency for each welding operator.

The welding condition correction method according to this embodiment includes at least a first step (step S4 in FIG. 2) of calculating a first speed, and a second step (step S6 in FIG. 2) of correcting the welding parameters described in the first welding condition table in accordance with the difference between the first welding speed and the first speed described in the first welding condition table corresponding to the workpiece W to be welded if the difference exceeds a predetermined range.

According to this embodiment, the difference between the first welding speed and the first speed is quantified and understood, making it possible to appropriately grasp the skill level of the welding operator.

In addition, according to this embodiment, by executing the first speed measurement process (steps S3 and S4 in FIG. 2) in the flowchart shown in FIG. 2 m times (m is an integer equal to or greater than 1), a training effect can be achieved in that the welding operator is trained to move the welding torch 50 at a speed that matches the target value. In particular, by setting the value of m according to the proficiency of the welding operator, more appropriate training can be achieved.

If there is no welding condition table stored in the first memory unit 13 that describes a welding speed whose difference from the first welding speed is within a predetermined range among the multiple welding condition tables related to the same type of workpiece W, in the second step, a new welding condition table for welding the workpiece W is generated using the multiple welding condition tables stored in the first memory unit 13.

In this way, the correction process can be simplified. Furthermore, even when the welding parameters are corrected to match the first speed, which is the actual working speed of the welding operator, each welding parameter can be set to an appropriate value that can actually be used.

Furthermore, if a second welding condition table exists among the multiple welding condition tables stored in the first storage unit 13 and related to the same type of workpiece W, it is preferable to further provide a third step (step S7 in FIG. 2) in place of the second step, of setting the second welding condition table as a new welding condition table for welding the workpiece W. Note that the second welding condition table describes a welding speed whose difference from the first welding speed is within a predetermined range.

By doing this, calculation processing for correction can be omitted. Also, since the second welding condition table that has already been acquired is used, appropriate welding can be performed without deteriorating the shape of the weld bead, etc.

The welding work training program according to this embodiment causes a computer system having one or more processors to execute at least the first and second steps (steps S4 and S6 in FIG. 2) or the first and third steps (steps S4 and S7 in FIG. 2) in the above-mentioned welding condition correction method. Note that the computer system in this embodiment includes at least the first calculation unit 12a or the second calculation unit 22a or both and the first storage unit 13, and more preferably includes the first display unit 14 and the second input unit 21.

By programming the procedure for executing the welding condition correction method in this way, welding operators can correct welding parameters easily and efficiently.

Other Embodiments
In the embodiment, an example has been shown in which the welding operator calculates the first speed by moving his/her finger, the welding torch 50, or the like along the surface of the touch panel 21a of the remote controller 20.

However, this is not particularly limited, and the first speed may be calculated by moving a finger, the welding torch 50, or the like along the surface of the touch panel 14a of the first display unit 14 provided on the welding power source 10, as shown in FIG. 4. In this case, the first display unit 14 also functions as an input unit. Furthermore, the touch panel 14a may be either a contact type or a non-contact type.

Even in the case shown in FIG. 4, the remote controller 20 may have a first speed measurement function. In other words, depending on the selection of the welding operator, the touch panel 14a of the first display unit (input unit) 14 or the touch panel 21a of the second input unit 21 may be used to measure the first speed.

In addition, in the embodiment, the welding power source 10 is provided with the first storage unit 13, but the storage destination of the welding condition correction program and the welding condition table is not particularly limited to this. For example, instead of providing the welding power source 10 with the first storage unit 13, 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 condition correction program, the welding condition table, etc. The external memory may be, for example, an SD (registered trademark) card or a USB (trademark) memory, or may be a server configured to be capable of communicating with the welding power source 10.

The arc welding device disclosed herein is useful because it can appropriately correct welding parameters according to the skill level of the welding operator.

10: Welding power source 11: Main circuit 12: First control unit 12a: First calculation unit (calculation unit)
13 First storage section (storage section)
14 First display unit (input unit)
14a touch panel 20 remote controller 21 second input unit 21a touch panel 22 second control unit 22a second calculation unit (calculation unit)
30 Wire feeder 31 First signal line 32 Second signal line 40 Welding cable 41 Ground wire 50 Welding torch 60 Welding wire 70 Arc welding device W Workpiece

Claims

An arc welding apparatus including at least an input unit, a memory unit, a calculation unit, a welding power source, and a welding torch,
the input unit includes a touch panel,
the memory unit stores a plurality of welding condition tables for each of a plurality of types of workpieces,
The calculation unit is
a welding operator moves his/her hand along a surface of the touch panel, and a first speed is calculated based on a moving distance of the hand detected by the touch panel;
reading out from the storage unit a first welding condition table from among the plurality of welding condition tables corresponding to the workpiece to be welded;
When a difference between a first welding speed described in the first welding condition table and the first speed exceeds a predetermined range,
The arc welding device is characterized in that the calculation unit corrects the welding parameters described in the first welding condition table in accordance with the difference.
2. The arc welding apparatus according to claim 1,
If the welding condition table stored in the storage unit does not include a welding speed in which the difference from the first welding speed is within the predetermined range, among the multiple welding condition tables related to the workpiece of the same type,
the calculation unit generates a new welding condition table for welding the workpiece using the plurality of welding condition tables stored in the storage unit;
In the new welding condition table,
the welding speed is generated by performing an interpolation process on the welding speeds in the plurality of welding condition tables so that the difference between the welding speeds and the first welding speed falls within the predetermined range;
The other welding parameters, which are welding parameters other than the welding speed, are generated by performing an interpolation process on the other welding parameters in a plurality of the welding condition tables based on an interpolation coefficient obtained by the interpolation process.
2. The arc welding apparatus according to claim 1,
a second welding condition table stored in the storage unit, in which a welding speed whose difference from the first welding speed is within the predetermined range is described, is present among a plurality of welding condition tables related to the workpiece of the same type;
The arc welding device is characterized in that the calculation 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.
2. The arc welding apparatus according to claim 1,
The arc welding device according to claim 1, wherein the first speed is a moving speed of the welding operator's finger when the welding operator moves the finger along a surface of the touch panel.
2. The arc welding apparatus according to claim 1,
The arc welding device according to claim 1, wherein the first speed is a moving speed of the tip of the welding torch when the welding operator moves the tip along a surface of the touch panel.
A welding condition correction method using the arc welding apparatus according to claim 1,
The first step calculates the first speed when the welding operator moves his/her hand along a surface of the touch panel;
The second step includes, when the difference between the first welding speed and the first speed exceeds the predetermined range,
A welding condition correction method comprising: correcting welding parameters described in the first welding condition table in accordance with the difference.
7. The welding condition correction method according to claim 6,
If the welding condition table stored in the storage unit does not include a welding speed in which the difference from the first welding speed is within the predetermined range, among the multiple welding condition tables related to the workpiece of the same type,
The second step generates a new welding condition table for welding the workpiece by using a plurality of the welding condition tables stored in the storage unit,
In the new welding condition table,
the welding speed is generated by performing an interpolation process on the welding speeds in the plurality of welding condition tables so that the difference between the welding speeds and the first welding speed falls within the predetermined range;
a welding condition correction method for correcting a welding condition, the other welding parameters being welding parameters other than the welding speed, being generated by performing an interpolation process on the other welding parameters in a plurality of the welding condition tables based on an interpolation coefficient obtained by the interpolation process.
7. The welding condition correction method according to claim 6,
a second welding condition table stored in the storage unit, in which a welding speed whose difference from the first welding speed is within the predetermined range is described, is present among a plurality of welding condition tables related to the workpiece of the same type;
A welding condition correction method, comprising: instead of the second step, a third step of setting the second welding condition table as a new welding condition table for welding the workpiece.
A welding condition correction program for causing a computer system having one or more processors to execute each step of the welding condition correction method according to any one of claims 6 to 8.