JP6168701B2 - TIG welding system, program, and TIG welding method - Google Patents

Description

  The present invention relates to a TIG welding system, a program, and a TIG welding method.

  One of the main welding methods used in LNG (Liquefied Natural Gas) tanks that store liquefied natural gas is TIG (Tungsten Inert Gas) welding. While TIG welding enables high-quality welding, work efficiency is inferior. Therefore, in order to solve this problem, TIG welding has been automated. Although the labor load can be reduced by automating TIG welding, it is conceivable that the user records the production history for a long time in order to confirm the welding quality later.

  Conventionally, as a method of recording the production history during arc welding such as TIG welding, a method of recording the production history by installing a general-purpose data logger or the like outside the welding apparatus, or recording the production history inside the welding apparatus There are methods. For example, the arc welding robot described in Patent Document 1 operates in a predetermined operation pattern according to an operation program taught in advance, and the workpiece is welded under predetermined welding conditions set in advance in each predetermined period in the operation pattern. Is an arc welding robot for welding, and includes storage means for storing at least one of a program name, a welding location, and measurement data when the operation program is executed as history information.

JP 2006-26655 A

For example, in a welding environment of an LNG tank, the work space is narrow and the location is high, so it is not a general supply method for supplying power from the generator of the power plant through the transmission line, but for industrial use installed on site. It is necessary to secure electric power using a generator. In such a case, it is conceivable that, for example, the welding operation is abnormally stopped due to a sudden power cut or the like, and the welding condition data as the production history is lost.
An object of this invention is to provide the TIG welding system which can preserve | save, without erasing the data of welding conditions, even if it is a case where welding operation stops abnormally.

For this purpose, the present invention provides a non-consumable electrode for generating an arc, a feeder for supplying a filler wire, a slider for oscillating the non-consumable electrode, a control panel for storing and outputting welding conditions, and a user An operation box that enables a storage operation of welding conditions, a welding condition that is output from the control panel and is changed by the user using the operation box, and a welding condition that changes over time are stored at a predetermined timing. And a storage means for storing the stored welding conditions when the power is cut off.
Further, the storage means is provided so as to be detachable from the operation box.
Further, the welding condition that changes over time is a swing width of the non-consumable electrode when the slider oscillates the non-consumable electrode.

From another point of view, the present invention relates to a non-consumable electrode that generates an arc, a supply device that supplies a filler wire, a slider that oscillates the non-consumable electrode, and a control panel that stores and outputs welding conditions. An operation box that enables a user to store welding conditions, a first storage unit that stores welding conditions used for welding at predetermined first times, and a first storage unit TIG provided with a second storage means for reading and storing the stored welding conditions every predetermined second time longer than the first time, and storing the stored welding conditions when the power is turned off. It is a welding system.
In addition, the second storage means is welded as a main data in which all welding conditions to be stored in a predetermined period are stored as one file and a file divided at each predetermined sampling time point. And sub-data in which conditions are stored.
Further, when the welding operation is finished, the main data is stored without being erased, while the sub data is erased, and when the power is turned off before the welding operation is finished, the sub data is divided into files. It is stored without being erased.
The first storage means is provided as an internal memory of the control panel, and the second storage means is provided detachably with respect to the operation box.

Further, from another point of view, the present invention relates to a non-consumable electrode that generates an arc, a supply device that supplies a filler wire, a slider that oscillates the non-consumable electrode, and a control panel that stores and outputs welding conditions. A program used in a TIG welding system including an operation box that enables a user to store a welding condition, and the welding condition output from the control panel and changed by the user using the operation box, and A program for causing the TIG welding system to realize a function of storing welding conditions that change over time in a storage unit at a predetermined timing and storing the stored welding conditions in the storage unit when the power is turned off. is there.
Furthermore, from another viewpoint, the present invention generates an arc by a non-consumable electrode, oscillates the non-consumable electrode by a slider, supplies a filler wire by a supply device, and stores stored welding conditions from a control panel. A TIG welding method that enables a user to store a welding condition using an operation box, the welding condition being output from the control panel and changed by the user using the operation box, and over time In this TIG welding method, the changing welding conditions are stored in the storage unit at a predetermined timing, and the stored welding conditions are stored in the storage unit when the power is turned off.

  According to the present invention, even if the welding operation is abnormally stopped, the welding condition data can be stored without being lost.

It is a figure which shows an example of schematic structure of the TIG welding system which concerns on this Embodiment. It is a block diagram which shows an example of the TIG welding system which concerns on this Embodiment. It is a figure for demonstrating an example of an oscillation width | variety. It is the figure which showed an example of the screen displayed on the display part of an operation box. It is the flowchart which showed an example of the procedure which memorize | stores welding conditions in an internal memory and an external memory. (A)-(c) is a figure for demonstrating the example of the procedure which memorize | stores welding conditions in an internal memory and an external memory. It is a figure for demonstrating the example of the procedure which memorize | stores welding conditions in an internal memory and an external memory. It is a figure which shows an example of the data of the welding conditions preserve | saved as main data at the time of normal completion | finish. (A)-(c) is a figure which shows an example of the data of the welding conditions preserve | saved as subdata at the time of abnormal stop, such as a power failure. It is a figure which shows an example of the hardware constitutions of a control panel.

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
<Configuration of TIG welding system>
First, the TIG welding system 1 which concerns on this Embodiment is demonstrated. FIG. 1 is a diagram illustrating an example of a schematic configuration of a TIG welding system 1 according to the present embodiment. FIG. 2 is a block diagram showing an example of the TIG welding system 1 according to the present embodiment. Here, TIG welding is a welding technique in which a tungsten electrode is used to generate an arc between a base material that is an object to be welded and a tungsten electrode, and the base material and filler wire are melted and joined by the heat. . The filler wire is supplied to supplement the metal to the welded portion of the base material. Further, the tungsten electrode is used as a non-consumable electrode that is not easily consumed even by arc heat. Hereinafter, the tungsten electrode may be simply referred to as “electrode”.

  As shown in FIG.1 and FIG.2, the TIG welding system 1 which concerns on this Embodiment emits the arc from an electrode, and the welding apparatus 10 for TIG welding which welds the base material B which is the object of welding with the heat | fever, and And a control panel 20 for controlling each part constituting the TIG welding system 1. In addition, the TIG welding system 1 applies a voltage to the welding torch 11 attached to the welding apparatus 10 to generate an arc, and the MC that energizes the filler wire sent to the site to be welded by the welding apparatus 10. A power source 40 and a cooling water circulator 50 that circulates cooling water in the welding apparatus 10 are provided. In TIG welding system 1 concerning this embodiment, since electric power is secured using a generator (not shown) that supplies electric power to devices that require electric power, such as welding power supply 30 and MC power supply 40, welding is performed. It is assumed that a power failure occurs during the work and the welding work may stop abnormally.

  The welding apparatus 10 includes a welding torch 11 that holds an electrode, a Y axis direction that is a horizontal direction in FIGS. 1 and 2, and a Z axis that is a direction perpendicular to the paper surface in FIG. 1 and a vertical direction in FIG. 2. A biaxial slider 12 that is slid in the direction and a supply device 13 that supplies filler wire to the welded part are provided. The welding apparatus 10 holds the welding torch 11, the biaxial slider 12, the supply apparatus 13, an operation box 15, which will be described later, and the like, while the X axis is the vertical direction in FIG. 1 and the direction perpendicular to the paper surface in FIG. A cart 14 is provided that travels in the direction. In addition, the welding apparatus 10 includes an operation box 15 that is held on the carriage 14 and enables a user to store welding conditions.

The welding torch 11 holds an electrode, and a voltage is applied to the electrode from the welding power source 30 to generate an arc.
The biaxial slider 12 as an example of the slider is connected to the welding torch 11 and, as shown in FIG. 2, is a groove that is parallel to the surface of the base material B and is the welded portion in the Y axis direction. The electrode is slid in the width direction of G (lateral direction in FIG. 2), that is, the horizontal slide part 121 for oscillating the electrode, and in the Z-axis direction, in other words, in the thickness direction of the base material B (vertical direction in FIG. 2). And a vertical slide part 122 to be slid. The horizontal slide unit 121 and the vertical slide unit 122 include a motor, a power transmission mechanism that transmits power of the motor, and the like, and slide the electrodes in the Y-axis direction and the Z-axis direction, respectively.

As shown in FIG. 1, the supply device 13 includes a wire reel 132 around which a filler wire is wound, and a feeding unit 133 that sends the filler wire from the wire reel 132 to the groove G through the conduit cable 131.
As shown in FIG. 1, the carriage 14 travels in the X-axis direction, in other words, in the weld line direction parallel to the surface of the base material B. As a result, the welding torch 11, the biaxial slider 12, the supply device 13, the operation box 15 and the like move in the X-axis direction.

  The operation box 15 has a plurality of operation buttons (not shown), and an operation for changing the setting of conditions (hereinafter referred to as welding conditions) determined in the welding operation when each operation button is pressed by the user. And an operation for starting a welding operation. Further, the operation box 15 has an insertion port for the external memory 151, and stores the welding conditions transferred from the control panel 20 in the external memory 151 inserted from the insertion port during the welding operation. The external memory 151 is provided so as to be detachable from the operation box 15. For example, a flash memory is used from the viewpoint of general purpose, large capacity, and small size, but any storage medium is used. Be good.

  The welding conditions stored in the external memory 151 are stored in the form of main data and sub data. The main data is data in which all welding conditions to be stored in a period from the start to the end of welding are stored as one file. The sub data is data in which welding conditions are stored as a file divided at predetermined sampling points. It is assumed that the divided sub-data can be combined into one data. In the present embodiment, a period from the start to the end of welding is used as an example of a predetermined period.

When the welding operation is normally completed, the main data in which the welding conditions for the period from the start to the end of the welding are stored is not deleted but is stored in the external memory 151. On the other hand, sub-data that is a plurality of divided files is deleted.
In addition, if the welding operation is terminated abnormally during a welding operation due to a power cut or the like before the welding operation is normally completed, the main data is damaged without being finalized. On the other hand, the sub data remains stored in the external memory 151 without being erased as a divided file.

  The operation box 15 has a display unit (not shown) configured by, for example, a liquid crystal monitor, and displays the contents of welding conditions, error information, and the like on the display unit. The error information is information relating to an error that has occurred before or during the welding operation. The error information includes, for example, information related to errors such as arc interruption, arc stop, electrode short circuit, servo abnormality, and power supply abnormality. In addition, the error information includes, for example, information related to an abnormality in the distance between the electrode and the base material B (hereinafter referred to as arc length). Information on the arc length abnormality is output based on an arc length visually detected by a camera or the like, an electrode movement amount obtained by AVC control, and the like. Here, the AVC control is control for adjusting the arc length to a constant by measuring the welding voltage and moving the welding torch 11 up and down so that the voltage matches a preset reference voltage.

  The control panel 20 is provided apart from the operation box 15 and the like held by the carriage 14 and controls the operation of each part constituting the TIG welding system 1. For example, the control panel 20 controls operations such as sliding by the biaxial slider 12, movement of the carriage 14, and supply of filler wire by the supply device 13. The control panel 20 also controls power supplied from the welding power source 30 to the electrodes and the base material B, power supplied from the MC power source 40 to the filler wire, and the like.

  Furthermore, the control panel 20 performs control for storing and outputting the welding conditions. Here, during the welding operation, the control panel 20 stores the welding conditions in the internal memory 21 of the control panel 20 and transfers the welding conditions stored in the internal memory 21 to the external memory 151 inserted in the operation box 15. I do. In addition, the control panel 20 stores the welding conditions used for welding in the internal memory 21 for each predetermined first time, and also stores the welding conditions stored in the internal memory 21 from the first time. The data is read and transferred to the external memory 151 every long predetermined second time. In the present embodiment, the internal memory 21 is used as an example of the first storage unit. In addition, an external memory 151 is used as an example of the storage unit and the second storage unit.

<Description of welding conditions>
Next, the welding conditions stored in the internal memory 21 and the external memory 151, which are welding work conditions, will be described. The user can set or change the welding conditions using the operation box 15, and the welding conditions include, for example, a welding current, a pulse current, an MC current, a welding voltage, a peak voltage at both ends, a welding speed, a wire. Data such as a feeding speed, a peak wire feeding speed, an oscillation speed, an oscillation stop time, an oscillation width, a reverse height, and a shift amount are included.

  The welding current is a current between the electrode and the base material B during the welding operation. In the present embodiment, the welding current may be either alternating current or direct current. Further, when the welding current is a direct current, the welding current may be a pulse. In addition, the output contents of the pulse output differ depending on the setting of “straight welding” and “oscillate welding”. In the case of setting at the time of straight welding, the welding current is switched between a low current (hereinafter referred to as base current) and a high current (hereinafter referred to as peak current) according to the timing of the pulse frequency, and general pulse current welding is performed. On the other hand, in the case of setting at the time of oscillating welding, the peak current is switched when the oscillating end is stopped when the electrode is oscillated. Further, for example, since the welding conditions vary depending on the thickness and type of the base material B, the peak current value and the pulse period when the welding current is a pulse are set according to the welding environment.

  The MC current is a current that is passed through the filler wire during the welding operation. The welding voltage is a voltage between the electrode and the base material B during welding work. The peak voltage at both ends is a voltage added to the welding voltage when the electrode stops at the oscillating end. When the oscillation end is stopped, AVC control is performed with a voltage obtained by adding the set value of the peak voltage at both ends to the set value of the welding voltage.

  The welding speed is the traveling speed of the carriage 14 during the welding operation. The wire feeding speed is a speed at which the filler wire is fed from the supply device 13 during the inching and welding operations of the filler wire. The peak wire feed speed is the wire feed speed when the electrode is stopped at the oscillating end. During the oscillating end stop, the wire feeding speed is increased or decreased by the set value of the peak wire feeding speed. Be changed.

  The oscillation speed is the speed of the electrode when the biaxial slider 12 oscillates the electrode. The oscillation stop time is a time during which the electrode is stopped at the left end or the right end of the oscillation when the electrode is oscillated, and includes a left end stop time and a right end stop time. The oscillation width is the deflection width of the electrode when the biaxial slider 12 oscillates the electrode. In the present embodiment, the oscillate width is used as an example of a welding condition that changes over time. Details of the oscillation width will be described later.

  The inversion height is a height that rises according to the shape of the groove surface, and is a threshold value used for groove detection in groove copying. The inversion height includes a left end inversion height and a right end inversion height according to the left end and the right end of the oscillation end. The shift amount is an amount by which the electrode is moved from the oscillating end while the electrode is stopped at the oscillating end, and there are a left end shifting amount and a right end shifting amount according to the oscillating end.

<Description of oscillation width>
Next, the oscillating width that is a welding condition will be described. FIG. 3 is a diagram for explaining an example of the oscillation width. As shown in FIG. 3, the electrode held by the welding torch 11 moves in accordance with the moving direction of the carriage 14 (the direction of the arrow A1). At this time, the biaxial slider 12 oscillates the electrode by oscillating in the direction of the arrow B1 and the direction of the arrow B2, for example, so that the welding is performed with high accuracy along the shape of the groove of the base material B. Thus, the distance between both ends of the oscillating end when the electrode is oscillated is the oscillating width. In the example illustrated in FIG. 3, the distance L1 between both ends of the oscillating end at a certain time point and the distance L2 are illustrated as examples of the oscillating width.

  Here, since the welding location of the base material B changes according to the shape of the base material B, the oscillating width also changes over time. The control panel 20 determines the width for moving the electrode according to the shape of the base material B, and controls the biaxial slider 12 so that the electrode is oscillated based on the determined width. In addition, the oscillation width determined by the control panel 20 at that time is stored in the internal memory 21 or the external memory 151 at every first time or second time from the start of welding.

<Description of the screen displayed on the display>
Next, a screen displayed on the display unit included in the operation box 15 will be described. FIG. 4 is a diagram illustrating an example of a screen displayed on the display unit of the operation box 15. In the screen shown in FIG. 4, as welding conditions, “welding current”, “P current”, “push speed”, “welding speed”, “left end stop”, “left shift”, “left reverse height”, “PW "Speed", "Welding voltage", "MC current", "Oscillation width", "Wire speed", "Right end stop", "Right shift", "Right reverse high", and "Both P voltage" are displayed. And the setting value of each welding condition is displayed next to the character of each welding condition.

  In the screen shown in FIG. 4, “welding current” is a setting value of welding current, “P current” is a setting value of peak current when pulse current welding is applied, “oscillating speed” is a setting value of oscillating speed, and “welding speed”. Is the set value of the welding speed, “Left end stop” is the set value of the left end stop time, “Left shift” is the set value of the left end shift amount, “Left inversion height” is the set value of the left end inversion height, and “PW speed” is This is the set value for the peak wire feed speed. “Welding voltage” is the welding voltage setting value, “MC current” is the MC current setting value, “Oscillation width” is the oscillation width setting value, “Wire speed” is the wire feeding speed setting value, “Stop” is the right end stop time setting value, “Right shift” is the right end shift amount setting value, “Right inversion height” is the right end inversion height setting value, and “Both P voltage” is the peak voltage setting value at both ends. .

  In the illustrated example, the welding current is 100 amperes (unit of current: A), the peak current is 0 A, the oscillation speed is 100 cm / min (cm per minute), the welding speed is 5.0 cm / min, and the left end stop time is The left end shift amount is set to 0.0 mm for 1.0 second. The left end inversion height is a value obtained by multiplying the set value by 0.05 to obtain the actual left end inversion height (mm), and in the case of the set value 5, it is set to 0.25 mm. The peak wire feed speed is obtained by multiplying the set value by 10 to obtain the peak wire feed speed. When the set value is 0, the peak wire feed speed is set to 0 cm / min. The welding voltage is 12.0 volts (unit of voltage: V), the MC current is 40 A, the oscillation width is 15.0 mm, the wire feed speed is 100 cm / min, the right end stop time is 1.0 second, the right end shift amount Is set to 0.0 mm, and the right-side inversion height is a right-side inversion height (mm) obtained by multiplying the set value by 0.05. When the set value is 5, the end-point peak voltage is 0 .0V is set. Here, for each welding condition, values set or changed by the user are displayed. As described above, the oscillating width is determined by the control panel 20 over time according to the shape of the base material B. The value to be displayed is displayed.

  Further, on the screen shown in FIG. 4, characters “Cooling water abnormality detected before starting welding” are displayed as error information regarding the cooling water. Furthermore, the character notation of “origin complete” is reversed in black and white (background is black and characters are white) when the origin return process for returning the welding torch 11 and the carriage 14 to the predetermined origin is completed. In the screen shown in FIG. 4, for example, the item of “welding current” is selected by the user pressing an operation button or the like, and the user changes the setting value of the welding current by performing further operations. be able to.

<Explanation of welding condition storage procedure>
Next, the procedure in which the control panel 20 stores the welding conditions in the internal memory 21 and the external memory 151 during the welding operation will be described. FIG. 5 is a flowchart showing an example of a procedure for storing welding conditions in the internal memory 21 and the external memory 151. Here, it is assumed that the external memory 151 is inserted into the operation box 15. Further, it is assumed that the user sets or changes the welding conditions using the operation box 15 before starting the welding work or during the welding work, and the welding conditions are displayed on the display unit of the operation box 15. Furthermore, when starting the welding operation, the user turns on a servo motor that controls the positions, speeds, and the like of the welding torch 11 and the carriage 14 to return the origin of the welding torch 11 and the like.

  First, when the user presses an operation button for accepting an operation for starting a welding operation among the operation buttons of the operation box 15, the control panel 20 accepts an operation for starting welding via the operation box 15 (steps). 101). Here, if the external memory 151 is not inserted in the operation box 15, an error is displayed on the display unit of the operation box 15. When the control panel 20 receives an operation for starting welding, the control panel 20 controls the operations of the welding torch 11 and the carriage 14 based on the preset welding conditions to start the welding work, and the time when the welding work is started ( Hereinafter, the welding start time and the set value of the welding condition are stored in the internal memory 21 (step 102).

  Next, the control panel 20 stores the welding conditions used for the welding work in the internal memory 21 every time a predetermined first time elapses from the welding start time. Here, the control panel 20 determines whether or not the first time has elapsed (step 103), and every time the first time elapses (Yes in step 103), the welding conditions used for the welding operation are determined. That is, the welding conditions set at that time are stored in the internal memory 21 (step 104). On the other hand, if the first time has not elapsed (No in step 103), the control panel 20 does not store the welding conditions in the internal memory 21.

  Further, the control panel 20 stores the welding conditions stored in the internal memory 21 in the external memory 151 of the operation box 15 every time a predetermined second time elapses from the welding start time. Here, the control panel 20 determines whether or not the second time has elapsed (step 105), and each time the second time elapses (Yes in step 105), the control panel 20 stores it in the internal memory 21 at that time. The read welding conditions are read out, and the read out welding conditions are stored in the external memory 151 (step 106). Here, the welding conditions are stored in the external memory 151 in the form of main data and sub-data. The sub-data is a file divided at each sampling time with the timing for each second time as a sampling point. As the welding conditions are stored. Then, at the time of an abnormal stop due to a power failure or the like, the stored sub data is not erased but remains stored in the external memory 151. On the other hand, if the second time has not elapsed (No in step 105), the control panel 20 does not store the welding conditions in the external memory 151.

  Here, for example, if the first time is 1 minute and the second time is 5 minutes, the welding conditions are stored in the internal memory 21 every minute from the welding start time. Further, the welding condition data stored in the internal memory 21 is transferred to the external memory 151 every 5 minutes and stored in the external memory 151.

  Next, the control panel 20 determines whether or not an operation for stopping the welding work has been received (step 107). Here, for example, when the user presses an operation button for accepting an operation for stopping the welding work, the control panel 20 accepts an operation for stopping welding via the operation box 15 (Yes in Step 107), The welding work is stopped by stopping the welding torch 11, the carriage 14, and the like. Further, the control panel 20 stores the time when the welding operation is stopped (hereinafter referred to as welding stop time) and the welding conditions set at that time in the internal memory 21 (step 108), and this processing flow is as follows. finish. On the other hand, if the operation for stopping welding is not accepted (No in Step 107), the process proceeds to Step 103, and the control panel 20 stores the welding condition in the internal memory 21 every first time, and then continues to the second time. The welding conditions are stored in the external memory 151 every time.

  Further, in the procedure shown in FIG. 5, when the user presses the operation button for accepting the operation for starting the welding work, the welding work is started and the process for storing the welding conditions is also started. It is not restricted to such a structure. For example, an operation button for starting storage may be provided separately. Moreover, the process which memorize | stores welding conditions is good also as a trigger at the rise of the welding current at the time of welding start, and a welding voltage. Furthermore, if the welding process storage process is started by pressing the operation button for starting the welding operation, forgetting operation or a processing error by the user can be prevented. Similarly, it is desirable that the storage process of the welding conditions is also stopped when the user presses an operation button for accepting an operation for stopping the welding work.

  Furthermore, it is assumed that the first time and the second time, which are intervals for storing the welding conditions, can be changed by the user. For example, when the first time is less than 1 second, the amount of welding condition data to be recorded becomes enormous, and when the welding operation is performed for a long time of half a day or more, the entire history does not remain in the external memory 151. There is. In addition, as the amount of data increases, the simplicity of the operation for confirming the recording by the user is lost. Furthermore, from the viewpoint of accuracy of recording confirmation, if the data of one welding condition is acquired at least in 600 seconds, the tendency of arc stability can be confirmed. Therefore, it is preferable to define the first time in the range from 1 second to 600 seconds.

  Further, assuming that the timing for each first time stored in the internal memory 21 is a storage point, the storage time of several to several tens of points is determined as one group for the second time. Here, there is no limitation on the number of storage points when the control panel 20 collectively transfers welding conditions from the internal memory 21 to the external memory 151, but from the viewpoint of the accuracy of recording confirmation by the user and the risk of abnormal termination. Therefore, it is preferable to transfer 50 or less storage points to the external memory 151 as a group.

<Example of welding condition storage procedure>
Next, an example of a procedure in which welding conditions are stored in the internal memory 21 and the external memory 151 will be described. FIGS. 6A to 6C and FIG. 7 are diagrams for explaining an example of a procedure for storing welding conditions in the internal memory 21 and the external memory 151. Here, the description will be made assuming that the first time is 1 minute and the second time is 5 minutes.

  Fig.6 (a) is a figure for demonstrating an example of the welding conditions memorize | stored 5 minutes after welding start. The welding condition data in the internal memory 21 shown in FIG. 6A represents the welding condition data stored for 5 minutes every minute from the welding start time. Then, five minutes after the welding start time, the welding condition data stored in the internal memory 21 is transferred to the external memory 151 and stored as main data and sub data.

  FIG. 6B is a diagram for explaining an example of welding conditions stored 10 minutes after the start of welding. The welding condition data in the internal memory 21 shown in FIG. 6B represents the welding condition data stored after being transferred to the external memory 151 after 5 minutes from the start of welding, and after 10 minutes from the start of welding. Data stored in the next 5 minutes. Then, 10 minutes after the welding start time, the welding condition data stored in the internal memory 21 is transferred to the external memory 151. Here, as main data, data on welding conditions for 10 minutes from the start of welding is stored as one file. On the other hand, as sub-data, in addition to the previously transferred welding condition data (data for 5 minutes from the start of welding), new welding condition data (5 minutes to 10 minutes after the start of welding) as a separate file. Later data) is stored.

  FIG. 6C is a diagram for explaining an example of welding conditions stored 20 minutes after the start of welding. The welding condition data in the internal memory 21 shown in FIG. 6C represents the welding condition data stored for 5 minutes from 15 minutes to 20 minutes after the start of welding. Then, 20 minutes after the welding start time, the welding condition data stored in the internal memory 21 is transferred to the external memory 151. Here, as main data, data of welding conditions for 20 minutes from the start of welding is stored as one file. On the other hand, as the sub data, the welding condition data transferred every 5 minutes exists as one file, and is stored as a total of 4 files every 5 minutes from the start of welding.

  Here, for example, when the user presses an operation button for stopping the welding operation 20 minutes after the start of welding, the sub-data is erased assuming that the welding operation is normally completed. On the other hand, the main data remains stored in the external memory 151.

  Next, for example, it is assumed that the power is cut off 12 minutes after the start of welding. In this case, as shown in FIG. 7, 12 minutes after the start of welding and before the power is cut off, the internal memory 21 stores welding condition data between 10 minutes and 12 minutes after the start of welding. It is remembered. The main data in the external memory 151 stores data on welding conditions for 10 minutes from the start of welding. On the other hand, in the sub data, data on welding conditions for 5 minutes from the start of welding and data on welding conditions for 5 minutes from 5 minutes to 10 minutes after the start of welding are stored as separate files.

  When the power is cut off, the main data file is not finalized and becomes damaged data, and the sub-data is finalized as a divided file and is not stored in the external memory 151 without being damaged. Become. That is, as sub-data, a file in which welding conditions for 5 minutes from the start of welding are stored and a file in which welding conditions for 5 minutes after 5 to 10 minutes from the start of welding are stored are stored. . Here, the control panel 20 may delete the damaged main data. Further, when the internal memory 21 is a volatile memory that cannot hold the stored information unless power is supplied, the welding condition data stored in the internal memory 21 is erased when the power is turned off.

<Example of stored welding condition data>
Next, welding conditions stored in the external memory 151 will be described. FIG. 8 is a diagram showing an example of welding condition data stored as main data at the normal end. Moreover, Fig.9 (a)-(c) is a figure which shows an example of the data of the welding conditions preserve | saved as subdata at the time of abnormal stop, such as a power failure. Here, the first time is 2 minutes and the second time is 4 minutes.

  In the data shown in FIG. 8, “No. machine number” is a number assigned to the welding apparatus 10, “Year / Month / Day” is the date when the data was recorded, and “Time” is the time when the data was recorded. That is, the illustrated data is data stored when the welding operation is started at 9:00 on October 12, 2012 and the welding operation is stopped after 32 minutes. “Type” represents the type of state of the welding operation, and stores one of welding start, welding, welding stop, and abnormal stop.

  “Regeneration condition number” is a number representing a predetermined welding condition. For example, when the regeneration condition number is “12”, the values of the parameters of the welding conditions are determined such that the welding current is 100 A, the welding voltage is 12.0 V, etc., and “12” is selected in advance. The welding condition value is set. Furthermore, during the welding operation, the user can change the welding conditions using the operation box 15. Further, “welding current”, “P current”, “welding voltage”, “welding speed”, “push width”, “push speed”, and “error information” are the same as those displayed on the display screen of FIG. It is. Thus, it is preferable to leave the machine number, the reproduction condition number, and the like in the stored data in addition to the welding conditions and the date and time when the data is stored.

  The welding conditions are stored in the internal memory 21 every 2 minutes and transferred from the internal memory 21 to the external memory 151 every 4 minutes. In the external memory 151, the welding conditions are stored separately for the main data and the sub data. However, when the welding operation is normally completed after 32 minutes, the sub data is deleted, and the data shown in FIG. Saved.

  The data shown in FIGS. 9A to 9C is sub-data stored when the operator starts welding at 9:00 on October 12, 2012 and abnormally stops after 12 minutes. Here, the welding conditions are stored in the internal memory 21 every 2 minutes and transferred from the internal memory 21 to the external memory 151 every 4 minutes. However, as shown in FIGS. Data transferred from is saved as a separate file.

  The data shown in FIG. 9 (a) is data stored in the external memory 151 4 minutes after the start of welding, and stores welding conditions, etc. 2 minutes after the start of welding and 4 minutes after the start of welding. . The data shown in FIG. 9B is data stored in the external memory 151 after 8 minutes from the start of welding, and stores welding conditions and the like after 6 minutes and 8 minutes from the start of welding. The data shown in FIG. 9C is data stored in the external memory 151 12 minutes after the start of welding, and stores welding conditions, etc. 10 minutes and 12 minutes after the start of welding.

  Furthermore, after 12 minutes from the start of welding, the user stopped abnormally before the welding stop operation was performed by the user. Therefore, the abnormal stop is recorded in the “type” column, and the cause of the error is recorded in the “error information” column. . On the other hand, the main data in the case of power interruption (power interruption) is in a damaged state, but the sub data remains as it is. That is, the three files in FIGS. 9A to 9C remain stored in the external memory 151 even when the power interruption is stopped.

  Further, the operator can display the saved welding condition data shown in FIGS. 8 and 9 on the display unit of the operation box 15, and further, for example, in a file format such as CSV (Comma-Separated Values). It is also possible to convert. In addition, the sub data is divided as a file every second time, but it may be edited into one file by the sub data editing function of the control panel 20, or edited into one file by an external application. Also good.

Moreover, the welding conditions shown in FIGS. 8 and 9 are examples of stored welding conditions. For example, only one of the welding conditions shown in FIGS. 8 and 9 may be stored. The other welding conditions such as the inverted height and shift amount may be further stored.
Further, in the example shown in FIGS. 8 and 9, the error information is stored as the sub data shown in FIG. 9C, but the present invention is not limited to such a configuration. For example, the main data and sub data may store an error or the like notifying the abnormality of the TIG welding system 1 although the welding operation is not stopped.

  As described above, the TIG welding system 1 stores in the internal memory 21 and the external memory 151 the welding conditions set or changed by the user and the conditions relating to the oscillating width that changes over time. Here, the control panel 20 stores the welding conditions in the internal memory 21 of the control panel 20 every first time, and transfers the welding conditions from the internal memory 21 every second time longer than the first time. And stored in the external memory 151. Even when the welding operation is abnormally stopped due to power interruption or the like, the welding conditions stored in the external memory 151 remain stored without being lost. Therefore, it becomes easy to manage the welding conditions used for welding, and the welding quality is confirmed based on the recorded welding conditions.

  In this embodiment, the welding operation is performed using one electrode, but the welding operation may be performed using a plurality of electrodes such as two electrodes. When there are a plurality of electrodes, welding conditions corresponding to each electrode are displayed on the display unit, and the user can check and set the welding conditions for each electrode in the operation box 15. And the welding conditions of each electrode are memorize | stored in the internal memory 21 and the external memory 151 similarly to the memory | storage procedure shown in FIG. However, since the amount of information to be stored increases as the number of electrodes increases, the number of electrodes is preferably 1 to 4, for example, considering the storage capacity of the storage means.

  Moreover, in this Embodiment, when a welding current is a direct current, the polarity of an electrode and a filler wire shall not be ask | required. In general, when the electrode is negative, it is called DCEN (Direct Current Electrode Negative), and when the electrode is positive, it is called DCEP (Direct Current Electrode Positive). Deepen. On the other hand, when the electrode is positive (DCEP), the effect of the cleaning action, which is the action of removing the oxide film on the surface of the base material B that has become the negative pole, is obtained.

  Furthermore, in the present embodiment, the material of the base material B is not limited, but for example, 9% N steel, stainless steel, and aluminum alloy are often used for the LNG tank, which is an iron-based alloy or an aluminum-based alloy. It is preferable.

  In the present embodiment, main data and sub data are stored in one external memory 151. However, for example, main data and sub data may be stored in separate external memories 151.

<Hardware configuration of control panel>
Next, the hardware configuration of the control panel 20 will be described. FIG. 10 is a diagram illustrating an example of a hardware configuration of the control panel 20.
As shown in the figure, the control panel 20 includes a CPU (Central Processing Unit) 201 that is a computing means, a volatile memory 202 that is a storage area, and a nonvolatile memory 203. Here, the CPU 201 executes various programs such as an OS (Operating System) and application software. The volatile memory 202 is a storage area for storing various programs and data used for execution thereof, and the non-volatile memory 203 is a storage area for storing input data for various programs, output data from various programs, and the like. is there.

  Furthermore, the control panel 20 includes a communication interface (hereinafter referred to as “communication I / F”) 204 for performing communication with the outside, and a driver 205 for reading and writing data with respect to the storage medium. . Note that FIG. 10 is merely a hardware configuration example, and the control panel 20 is not limited to the illustrated configuration. In the control panel 20, the non-volatile memory 203 stores a program for realizing a function of storing welding conditions. Then, this program is loaded into the volatile memory 202, and processing based on this program is executed by the CPU 201, thereby realizing the processing shown in FIG. The internal memory 21 is realized by, for example, a volatile memory 202.

  The program for realizing the embodiment of the present invention can be provided not only by a communication means but also by storing it in a recording medium such as a CD-ROM.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the said embodiment. It will be apparent to those skilled in the art that various modifications and alternative embodiments can be made without departing from the spirit and scope of the invention.

DESCRIPTION OF SYMBOLS 1 ... TIG welding system, 10 ... Welding device, 11 ... Welding torch, 12 ... Biaxial slider, 13 ... Feeder, 14 ... Dolly, 15 ... Operation box, 20 ... Control panel, 21 ... Internal memory, 30 ... Welding power source 40 ... MC power supply 151 ... External memory

Claims (9)

A non-consumable electrode that generates an arc;
A supply device for supplying filler wire;
A slider for oscillating the non-consumable electrode;
A control panel for storing and outputting welding conditions;
An operation box that allows a user to memorize welding conditions;
The welding conditions output from the control panel and changed by the user using the operation box and the welding conditions that change over time are stored at a predetermined timing, and the stored welding conditions are stored when the power is cut off. A TIG welding system comprising storage means.   The TIG welding system according to claim 1, wherein the storage unit is provided so as to be detachable from the operation box.   3. The TIG welding system according to claim 1, wherein the welding condition that changes with time is a swing width of the non-consumable electrode when the slider oscillates the non-consumable electrode. A non-consumable electrode that generates an arc;
A supply device for supplying filler wire;
A slider for oscillating the non-consumable electrode;
A control panel for storing and outputting welding conditions;
An operation box that allows a user to memorize welding conditions;
First storage means for storing the welding conditions used for welding for each predetermined first time;
The second welding condition stored in the first storage means is read and stored every predetermined second time longer than the first time, and the stored welding condition is stored when the power is turned off. A TIG welding system comprising storage means.   The second storage means includes main data in which all welding conditions to be stored in a predetermined period are stored as one file, and welding conditions as files divided at predetermined sampling points. 5. The TIG welding system according to claim 4, further comprising sub-data to be stored.   At the end of the welding operation, the main data is stored without being deleted, while the sub data is deleted, and when the power is turned off before the welding operation is completed, the sub data is deleted as a divided file. 6. The TIG welding system according to claim 5, wherein the TIG welding system is stored without being stored.   The first storage means is provided as an internal memory of the control panel, and the second storage means is provided detachably with respect to the operation box. The TIG welding system according to claim 1. A non-consumable electrode for generating an arc, a feeder for supplying a filler wire, a slider for oscillating the non-consumable electrode, a control panel for storing and outputting welding conditions, and an operation enabling a user to store welding conditions. A program used in a TIG welding system with a box,
The welding conditions output from the control panel and changed by the user using the operation box, and the welding conditions that change over time are stored in the storage means at a predetermined timing, and the stored welding conditions are stored in the power source. The program for making the said TIG welding system implement | achieve the function preserve | saved at the said memory | storage means in the case of cutting | disconnection. An arc is generated by a non-consumable electrode, the non-consumable electrode is oscillated by a slider, a filler wire is supplied by a supply device, a stored welding condition is output from a control panel, and a welding condition stored by a user using an operation box is stored. A TIG welding method enabling operation,
The welding conditions output from the control panel and changed by the user using the operation box, and the welding conditions that change over time are stored in the storage means at a predetermined timing, and the stored welding conditions are stored in the power source. A TIG welding method for storing in the storage means upon disconnection.

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