TWI586474B - TIG welding system, recording medium and TIG welding method - Google Patents

Description

TIG welding system, recording medium and TIG welding method

The invention relates to a TIG welding system, a recording medium and a TIG welding method.

One of the main methods of welding LNG (Liquefied Natural Gas) storage tanks for storing liquefied natural gas is the so-called TIG (Tungsten Inert Gas) welding. TIG welding can achieve high-quality welding, but on the other hand, its work efficiency is poor, so in order to eliminate this, the automation of TIG welding has been developed in the past. Moreover, although the labor burden can be reduced by the automation of TIG welding, in order to allow the user to confirm the welding quality later, it is desirable to record the production history for a long time in advance.

Conventionally, a method of recording a production history at the time of arc welding such as TIG welding, a method of recording a production history by setting a general-purpose data logger outside the fusion splicing device, or recording a production history inside the fusion splicing device Method and so on. For example, the arc welding robot described in Patent Document 1 operates in a predetermined operation mode by an operation program taught in advance, and is pre-defined in each predetermined period of the operation mode. The arc welding robot arm that welds the material to be welded is set by the predetermined welding condition, and the storage means is provided, and at least one of the program name, the welding place, and the measurement data when the operation program is executed is stored as history information.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2006-26655

For example, in a welding environment of an LNG tank, since the working space is narrow or located at a high place, it is not possible to use a general supply method in which power is supplied from a generator of a power generation station through a feeder, and it is necessary to use an industrial hair set in the field. The motor is used to ensure power. In such a situation, for example, when the sudden power interruption or the like causes the welding operation to be abnormally stopped, it is expected that the production history, that is, the welding condition, will disappear.

An object of the present invention is to provide a TIG welding system capable of storing data of a welding condition without disappearing even if the welding operation is abnormally stopped.

Based on the object, the present invention is a TIG welding system comprising: a non-consumable electrode for generating an arc; a supply device for supplying filler welding a sliding member that oscillates the non-consumable electrode; a control panel that memorizes and outputs the welding condition; an operating box that allows the user to perform a memory operation of the welding condition; and a memory means that is output from the aforementioned control panel and utilizes the foregoing The welding box, which is changed by the user, and the welding condition which changes with time, are memorized at a predetermined time point, and the memory welding condition is stored when the power is interrupted.

Further, the above memory means is characterized in that it is provided to be detachable from the operation box.

Further, the welding condition for the temporal change is characterized in that the amplitude of the non-consumable electrode when the slider oscillates the non-consumable electrode.

Further, from another point of view, the present invention is a TIG welding system having: a non-consumable electrode for generating an arc; a supply device for supplying a filler wire; a slider for oscillating the non-consumable electrode; and a control panel for imparting welding conditions Memory and output; operation box, user can perform memory operation of welding condition; first memory means, welding condition for memory welding every first predetermined time; and second memory means, every second The second time, which is long in advance, reads and memorizes the welding condition stored in the first memory means, and stores the memory welding condition when the power is interrupted.

Further, the second memory means is characterized in that: the main data is stored in a file for all the welding conditions to be memorized during the predetermined period; and the sub-materials are memorized to be fixed every predetermined time. The file at which the sampling time is divided.

Moreover, the feature is that the main data is not used at the end of the welding operation. When the data is erased and saved, the sub-material is erased. Further, when the power supply is interrupted before the end of the welding operation, the sub-data is stored as a divided file and is not erased.

Further, the first memory means is characterized in that it is provided as an internal memory of the control panel, and the second memory means is provided detachably from the operation box.

Moreover, from another point of view, the present invention is a recording medium comprising: a non-consumable electrode for generating an arc; a supply device for supplying a filler wire; a slider for oscillating the non-consumable electrode; and a control panel for memorizing the fusion condition And outputting; an operation box for the user to perform a memory operation of the welding condition; a program used by the TIG welding system for enabling the aforementioned TIG welding system to perform the following functions: outputting from the aforementioned control panel and utilizing the aforementioned operation box The welding condition changed by the user and the welding condition which changes with time are stored in the memory means at a predetermined time point, and the memory welding condition is stored in the memory means when the power supply is interrupted.

Moreover, from another point of view, the present invention is a TIG welding method in which an arc is generated by a non-consumable electrode, the non-consumable electrode is oscillated by a slider, and a filler wire is supplied by a supply device, and the welded condition to be memorized is obtained. A TIG welding method for outputting a welding condition by a user of the operation box, and a welding condition that is output from the control panel and is changed by the user using the operation box, and is time-dependent. The changing welding condition is memorized in the memory means at a predetermined time point, and the memory welding condition is stored in the memory means when the power supply is interrupted.

According to the present invention, even if the welding operation is abnormally stopped, the data of the welding condition is not lost and can be stored.

1‧‧‧TIG welding system

10‧‧‧welding device

11‧‧‧fusion torch

12‧‧‧Two-axis slides

13‧‧‧Supply device

14‧‧‧Trolley

15‧‧‧Operator box

20‧‧‧Control panel

21‧‧‧ internal memory

30‧‧‧Splicing power supply

40‧‧‧MC power supply

151‧‧‧External memory

Fig. 1 is a schematic view showing an example of a schematic configuration of a TIG welding system of the present embodiment.

Fig. 2 is a schematic block diagram showing an example of a TIG welding system of the present embodiment.

[Fig. 3] A diagram for explaining an example of the oscillation amplitude.

Fig. 4 is a view showing an example of a screen displayed on the display unit of the operation box.

Fig. 5 is a schematic flow chart showing an example of a procedure for storing the welding conditions in the internal memory and the external memory.

[Fig. 6] (a) to (c) are diagrams for explaining a procedure for storing the welding conditions in the internal memory and the external memory.

[Fig. 7] A diagram for explaining a procedure for storing the welding conditions in the internal memory and the external memory.

[Fig. 8] A schematic diagram showing an example of data which is saved as a welding condition of the main data at the time of normal completion.

[Fig. 9] (a) to (c) are diagrams showing an example of data stored as a welding condition of the sub-data at the time of abnormal stop such as a power interruption.

FIG. 10 is a schematic view showing an example of a hardware configuration of a control panel.

Embodiments of the present invention will be described in detail below with reference to the drawings.

<Composition of TIG welding system>

First, the TIG welding system 1 of the present embodiment will be described. Fig. 1 is a schematic view showing an example of a schematic configuration of a TIG welding system 1 of the present embodiment. Fig. 2 is a schematic block diagram showing an example of the TIG welding system 1 of the embodiment. Here, the term "TIG welding" refers to the use of a tungsten electrode to cause an arc between the base material and the tungsten electrode, which is the object to be welded, and the fusion of the base material and the filler wire by heat. technique. The filler wire is supplied to fill the metal at the welded portion of the base material. Further, the tungsten electrode is used as a non-consumable electrode which is hard to be consumed even if it is subjected to arc heat. Hereinafter, the tungsten electrode will be simply referred to as "electrode".

As shown in FIG. 1 and FIG. 2, the TIG welding system 1 of the present embodiment includes a welding device 10 for TIG welding, which generates an arc from an electrode, and welds the base material B, which is a welding target, by heat; and controls The disk 20 controls the components constituting the TIG welding system 1. Further, the TIG welding system 1 includes a fusion power source 30, a voltage is applied to a welding torch 11 attached to the welding device 10 to generate an arc, and the MC power source 40 is sent to the welded portion at the welding device 10 pair. The filler wire is energized; and the cooling water circulator 50 circulates the cooling water in the welding device 10. Further, in the TIG welding system 1 of the present embodiment, power is supplied to a device that requires electric power such as the fusion power source 30 or the MC power source 40. Since the generator is shown to ensure electric power, it is determined that a power failure or the like may occur in the welding operation, and there is a case where the welding operation is abnormally stopped.

The welding device 10 includes a welding torch 11 and a holding electrode, and a biaxial slider 12 having the electrodes in the left-right direction, that is, the Y-axis direction in FIGS. 1 and 2, and the direction perpendicular to the paper surface in FIG. The vertical direction is the Z-axis direction; and the supply device 13 supplies the filler wire to the welded portion. Further, the welding device 10 is provided with the bogie 14, and the welding torch 11, the biaxial slider 12, the supply device 13, and the operation box 15 to be described later are held in the vertical direction in Fig. 1, that is, in the direction perpendicular to the paper surface in Fig. 2 Travel in the X-axis direction. Further, the welding device 10 is provided with an operation box 15, and is held by the carriage 14, so that the user can perform a memory operation of the welding condition.

The welding torch 11 is a holding electrode, and an arc is generated by applying a voltage to the electrode from the welding power source 30.

As an example of the slider, the biaxial slider 12 is connected to the welding torch 11, and as shown in FIG. 2, has a lateral sliding portion 121 such that the electrode is in the Y-axis direction, in other words, parallel to the surface of the base material B. Sliding in the width direction of the groove G (the horizontal direction in FIG. 2), that is, the oscillation of the electrode; and the vertical sliding portion 122, so that the electrode is in the Z-axis direction, in other words, in the base material B. The thickness direction (longitudinal direction in Fig. 2) slides. The lateral sliding portion 121 and the vertical sliding portion 122 have 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.

The supply device 13, as shown in FIG. 1, has: a wire reel 132 for winding a filler wire; and a feeding portion 133 for welding the filler wire from the wire The wire reel 132 is fed to the groove G through a cable conduit 131.

The trolley 14, as shown in Fig. 1, travels in the X-axis direction, in other words, in the direction of the weld line parallel to the surface of the base material B. As a result, the welding torch 11, the twin-shaft slider 12, the supply device 13, the operation box 15, and the like are facilitated to move in the X-axis direction.

The operation box 15 has a plurality of operation buttons (not shown), and the operation buttons of the conditions (hereinafter referred to as welding conditions) defined in the change welding operation are accepted or started by the user pressing each operation button. The operation of the welding operation, etc. Further, the operation box 15 has an insertion port of the external memory 151, and the welding condition transmitted from the control panel 20 is stored in the external memory 151 inserted from the insertion port during the welding operation. The external memory 151 is provided to be detachable from the operation box 15, and for example, a flash memory is used from the viewpoint of versatility, large capacity, and small size, but any memory medium can be used.

In addition, the welding conditions stored in the external memory 151 are determined to be stored in the form of main data and sub-data. The main data is all the welding conditions that should be memorized from the beginning to the end of the welding, and is memorized as a file. In addition, the sub-information is information that the welding condition is memorized and is divided into files that are divided every predetermined sampling time. The divided sub-data is set to be able to continue to be a material. In the present embodiment, an example of a predetermined period is used in a period from the start of welding to the end of welding.

Also, when the welding operation ends normally, it is remembered. The main data of the welding condition from the start to the end of the welding is maintained and stored in the external memory 151 without being eliminated. On the other hand, the multiple files that are divided, that is, the secondary materials, will be eliminated.

In addition, in the case where the welding operation is abnormally terminated due to a power interruption or the like before the welding operation is normally completed, the main data has not been finalized and becomes damaged data. On the other hand, the sub-data is stored as a divided file, and is stored in the external memory 151 without being erased.

Further, the operation box 15 has, for example, a display unit (not shown) including a liquid crystal monitor or the like, and displays the content of the welding condition, error information, and the like on the display unit. The so-called error information is information about errors that occur before or during the welding operation. The error information includes, for example, information on errors such as arc disconnection, arc stop, electrode short circuit, servo abnormality, and power supply abnormality. Further, the error information includes, for example, information on the abnormality of the distance between the electrode and the base material B (hereinafter referred to as the arc length). The information on the abnormality of the arc length is output based on the length of the arc visually detected by a camera or the like, the amount of movement of the electrode obtained by AVC control, or the like. Here, the AVC control is a process of measuring the welding voltage and moving the welding torch 11 up and down so that the voltage conforms to a predetermined reference voltage, thereby adjusting the arc length to a constant level.

The control panel 20 is provided away from the operation box 15 and the like held by the carriage 14, and controls the operations of the respective units constituting the TIG welding system 1. For example, the control panel 20 controls the sliding caused by the biaxial slider 12, or the movement of the trolley 14, the supply of the filler wire by the supply device 13, and the like. Work. Further, the control panel 20 controls the electric power supplied from the welding power source 30 to the electrode or the base material B, or the electric power supplied from the MC power source 40 to the filler wire.

Further, the control panel 20 performs control for memorizing and outputting the welding conditions. Here, the control panel 20 memorizes the welding condition in the internal memory 21 of the control panel 20 in the welding operation, and transmits the welding condition stored in the internal memory 21 to the external memory 151 inserted into the operation box 15. control. In detail, the control panel 20 stores the welding conditions for welding in the internal memory 21 every predetermined time, and the welding conditions stored in the internal memory 21 are longer than the first time. The second time is read in advance and transmitted to the external memory 151. In the present embodiment, an example of the first memory means uses the internal memory 21. Further, as an example of the memory means and the second memory means, the external memory 151 is used.

<Description of welding conditions>

Next, the conditions of the welding operation, that is, the welding conditions stored in the internal memory 21 and the external memory 151 will be described. The user can use the operation box 15 to set or change the welding conditions, for example, including welding current, pulse current, MC current, welding voltage, peak voltage at both ends, welding speed, wire feeding speed, peak wire feeding speed, oscillation. Speed, oscillation stop time, oscillation amplitude, reverse height, offset, etc.

The so-called welding current is the electrode and base material in the welding operation. The current between B. In the present embodiment, the welding current can be set to either AC or DC. Moreover, when the welding current is DC, the welding current may also be a pulse. In detail, the output of the pulse is different in the settings of "When the line is welded" and "When the line is oscillated". In the case of setting in the case of straight-line welding, the welding current is switched to a low current (hereinafter referred to as a basic current) and a high current (hereinafter referred to as a peak current) in response to the pulse frequency, which is a general pulse current welding. On the other hand, in the case of the setting at the time of oscillation welding, when the electrode is oscillated while the oscillation end is stopped, it is switched to the peak current. In addition, since the welding condition differs depending on, for example, the thickness or type of the base material B, the peak current value, the pulse period, and the like in the case where the welding current is pulsed is set to be set in accordance with the environment at the time of welding.

The MC current is the current that energizes the filler wire during the welding operation. The welding voltage is the voltage between the electrode and the base material B in the welding operation. In addition, the peak voltage at both ends is the voltage applied to the welding voltage when the electrode stops at the oscillation end. When the oscillation end is stopped, the AVC control is performed by adding a voltage of a set value of the peak voltages of both ends to the set value of the welding voltage.

The welding speed is the traveling speed of the trolley 14 in the welding operation. The wire feed speed is the speed at which the filler wire is fed from the supply device 13 during the entrainment and welding operation of the filler wire. The so-called peak wire feeding speed is the wire feeding speed at which the electrode stops at the oscillating end. When the oscillating end is stopped, the wire feeding speed is changed to a speed at which the set value of the peak wire feeding speed is increased or decreased.

The so-called oscillation speed is when the biaxial slider 12 oscillates the electrode. The speed of the electrode. The oscillation stop time is the time when the electrode stops at the oscillation end of the left end or the right end when the electrode is oscillated, and there is a left end stop time and a right end stop time. The amplitude of the oscillation is the amplitude of the electrode when the biaxial slider 12 oscillates the electrode. In the present embodiment, the oscillation width is used as an example of the welding condition for the temporal change. The details of the oscillation amplitude will be described later.

The reverse height is a height that rises along the shape of the groove surface, and is a threshold for groove detection for groove patterning. In the reverse height, the left end and the right end of the oscillating end have a left end reverse height and a right end reverse height. The offset amount is the amount by which the electrode is moved from the oscillation end during the period in which the electrode stops at the oscillation end, and the left end offset amount and the right end offset amount are required in response to the oscillation end.

<Explanation of oscillation amplitude>

Next, the oscillation amplitude of the welding condition will be described. Fig. 3 is a diagram for explaining an example of the oscillation amplitude. 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 is welded to the shape of the groove of the base material B with high precision, and oscillates, for example, in the direction of the arrow B1 and the direction of the arrow B2 to vibrate the electrode. In this way, the distance between the ends of the oscillating end when the electrode is oscillated is the oscillation amplitude. In the example shown in Fig. 3, the distance L1 or the distance L2 at both ends of the oscillation end at a certain point in time is revealed as an example of the oscillation amplitude.

Here, the welded portion of the base material B changes depending on the shape of the base material B, and therefore the amplitude of the oscillation also changes with time. Control panel 20, The amplitude of the swinging electrode is determined in accordance with the shape of the base material B, and the biaxial slider 12 is controlled to allow the electrode to oscillate according to the determined amplitude. Further, from the start of welding, the oscillation amplitude determined at the control panel 20 at this time point is stored in the internal memory 21 or the external memory 151 every other time or second time.

<Description of the screen displayed on the display unit>

Next, a screen displayed on the display unit of the operation box 15 will be described. 4 is a view showing an example of a screen displayed on the display unit of the operation box 15. In the screen shown in Fig. 4, as the welding condition, "splicing current", "P current", "oscillation speed", "splicing speed", "left end stop", "left offset", and "left reverse height" are displayed. "PW speed", "welding voltage", "MC current", "oscillation amplitude", "wire speed", "right end stop", "right offset", "right reverse high", "two P voltage" . Further, the set values of the respective welding conditions are displayed next to the characters of the respective welding conditions.

In the screen shown in Fig. 4, the "splicing current" is the set value of the welding current, the "P current" is the set value of the peak current when the pulse current is selected, the "oscillating speed" is the set value of the oscillation speed, and the "welding speed". For the setting value of the welding speed, "Left stop" is the set value of the left stop time, "Left offset" is the set value of the left end offset, "Left reverse high" is the set value of the left reverse height, "PW Speed is the set value of the peak wire feed speed. In addition, the "welding voltage" is the set value of the welding voltage, the "MC current" is the set value of the MC current, and the "oscillation amplitude". The set value of the oscillation amplitude, the "wire speed" is the set value of the wire feed speed, the "right stop" is the set value of the right stop time, the "right offset" is the set value of the right offset, and the "right reverse" is high. The set value for the right end reverse height and the "two P voltages" are the set values of the peak voltages at both ends.

Further, in the example of the figure, the welding current is set to 100 amps (current unit: 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 set. 1.0 second, the left end offset is 0.0mm. The left end reversal height is a value obtained by multiplying the set value by 0.05 to the actual left end reversal height (mm). In the case of the set value of 5, it is set to 0.25 mm. The peak wire feed speed is a set value multiplied by 10 and the value is the peak wire feed speed. When the set value is 0, it is set to 0 cm/min. Further, the welding voltage is set to 12.0 volts (voltage unit: V), the MC current is 40 A, the oscillation amplitude is 15.0 mm, the wire feeding speed is 100 cm/min, the right end stop time is 1.0 second, and the right end offset is 0.0 mm; The height of the right end is inverted, and the value obtained by multiplying the set value by 0.05 is the right reverse height (mm). When the set value is 5, it is set to 0.25 mm, and the peak voltage at both ends is set to 0.0 V. Here, for each welding condition, the value set or changed by the user is displayed. However, as described above, the oscillation amplitude is a value that is determined on the control panel 20 in response to the shape of the base material B as described above.

Further, in the screen shown in Fig. 4, the error information on the cooling water shows the text "Detecting abnormality of the cooling water before the start of welding". Also, the text of "original completion" is written when the welding torch 11 or the table is made When the car 14 or the like returns to the original point of the predetermined origin, the processing will be black and white (the background is black and the text is white). Further, in the screen shown in FIG. 4, for example, the user selects the item of "splicing current" by pressing an operation button or the like, and the user can further change the setting value of the welding current.

<Description of the memory procedure of the welding condition>

Next, a procedure for the control panel 20 to memorize the welding conditions in the internal memory 21 and the external memory 151 in the welding operation will be described. FIG. 5 is a schematic flow chart showing an example of the procedure for storing the welding conditions in the internal memory 21 and the external memory 151. Here, the external memory 151 is inserted in the operation box 15. Further, the user is set to use the operation box 15 before the start of the welding operation or the welding box 15 to set or change the welding condition, and the welding condition is displayed on the display unit of the operation box 15. Further, when the user starts the welding operation, the servo motor that controls the position and speed of the welding torch 11 or the carriage 14 is turned on (ON) to return the welding torch 11 and the like to the origin.

First, when the user presses an operation button for accepting an operation to start the welding operation among the operation buttons provided in the operation box 15, the control panel 20 receives the operation of starting the welding through the operation box 15 (step 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. The control panel 20 controls the operation of the welding torch 11 or the trolley 14 to start the welding operation according to the welding condition set in advance, and the start of the welding operation is started. The time at which the welding operation is performed (hereinafter referred to as 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 is stored in the internal memory 21 every time the welding is started, and the welding condition for the welding operation is memorized every time the first predetermined time has elapsed. Here, the control panel 20 determines whether the first time has elapsed (step 103), and the welding condition used for the welding operation, that is, the welding condition set at the time point, is performed every time the first time (Yes in step 103) elapses. It is memorized 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 memorize the welding condition in the internal memory 21.

Further, the control panel 20 memorizes the welding condition stored in the internal memory 21 in the external memory 151 of the operation box 15 every time the predetermined second time elapses from the welding start timing. Here, the control panel 20 determines whether the second time has elapsed (step 105), and every time the second time elapses (Yes in step 105), the time point is stored in the internal memory 21 for the fusion condition read, and The read fusion condition is memorized in the external memory 151 (step 106). Here, in the external memory 151, the welding condition is memorized in the form of the main data and the sub-data, and as the sub-data, the sampling point is taken every second time, and the welding condition is memorized as every sampling. The file that was split at the time. Further, when an abnormality is caused by a power interruption or the like, the stored sub-data is not erased and is 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 condition in the external memory 151.

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

Next, the control panel 20 determines whether or not the operation of stopping the welding operation has been accepted (step 107). Here, for example, when the user presses an operation button for accepting an operation to stop the welding operation, the control panel 20 receives the operation of the welding stop through the operation box 15 (Yes in step 107), and causes the welding torch 11 or The trolley 14 or the like is stopped to stop the welding operation. Further, the control panel 20 stores the time at which the welding operation is stopped (hereinafter referred to as the welding stop time) and the welding condition set at the time point in the internal memory 21 (step 108), and the present processing flow ends. On the other hand, if the operation of the welding stop is not accepted (No in step 107), the process proceeds to step 103, and the control panel 20 continues to store the welding condition in the internal memory 21 every first time, and the welding is performed every second time. The condition is stored in the external memory 151.

Further, in the procedure shown in FIG. 5, it is designed such that the user presses an operation button for accepting the start of the welding operation, thereby starting the welding operation and starting the process of memorizing the welding condition, but is not limited to such a configuration. . For example, an operation button for starting the memory can be additionally set. Further, it is also possible to design the process of memorizing the welding condition by using the welding current at the start of welding and the rise of the welding voltage as a trigger. Also, if the operation button is designed to be started by pressing the welding operation, The memory processing of the welding condition will be started, and the user will be prevented from forgetting the operation or handling the error. Similarly, it is desirable to stop the memory processing of the welding condition by pressing the operation button for accepting the operation of stopping the welding operation by the user.

Further, the interval between the memory welding conditions, that is, the first time and the second time, is determined to be changeable by the user. For example, if the first time is less than 1 second, the amount of data of the welding condition to be recorded becomes large, and when the welding operation is performed for a long time of more than half a day, the external memory 151 may not be able to leave all of it. course. In addition, the amount of data becomes larger, and the ease of the work confirmed by the user is lost. Further, from the viewpoint of the accuracy of the recording confirmation, the data of one welding condition is obtained at least every 600 seconds, and the tendency of the arc stability can be confirmed. Therefore, the first time is preferably in the range of 1 second to 600 seconds.

In addition, when the time point stored in the first time of the internal memory 21 is used as the save point, the save point from the number of points to the tens of points is set to one set in the second time. Here, the number of storage points when the control panel 20 collectively transmits the welding condition from the internal memory 21 to the external memory 151 is not investigated, but the risk of abnormal termination is determined from the viewpoint of the accuracy of the recording by the user. From the viewpoint, it is preferable to uniformly transfer the storage points of 50 or less as one group to the external memory 151.

<Example of memory procedure for welding conditions>

Next, a procedure example in which the welding conditions are memorized in the internal memory 21 and the external memory 151 will be described. Figure 6 (a) ~ (c), and Figure 7 will melt A diagram for explaining the procedure of the internal memory 21 and the external memory 151 is described. Here, the first time is 1 minute, and the second time is 5 minutes.

Fig. 6(a) is a diagram for explaining an example of the welding condition that is memorized 5 minutes after the start of welding. The welding condition data of the internal memory 21 shown in Fig. 6(a) shows the data of the welding conditions memorized in 5 minutes from the start of welding. Further, after 5 minutes from the start of welding, the data of the welding condition stored in the internal memory 21 is transferred to the external memory 151, and is memorized as the main data and the sub-data.

Fig. 6(b) is a diagram for explaining an example of the welding condition that is memorized 10 minutes after the start of welding. The welding condition data of the internal memory 21 shown in Fig. 6(b) shows the data of the welding condition which is memorized after being transferred to the external memory 151 5 minutes after the start of welding, and is 5 minutes after the start of welding. The data memorized within 5 minutes after the minute. Further, after 10 minutes from the start of welding, the data stored in the welding condition of the internal memory 21 is transferred to the external memory 151. Here, as the main data, the data of the welding condition within 10 minutes from the start of welding is memorized as one file. On the other hand, as a sub-material, in addition to the data of the welding condition to be transmitted first (the data within 5 minutes from the start of welding), the data of the new welding condition is also memorable (5 minutes after the start of welding)~10 After the minute of the data) as another file.

Figure 6 (c) is remembered 20 minutes after the start of welding An example of the welding condition is illustrated. The welding condition data of the internal memory 21 shown in Fig. 6(c) shows the information of the welding conditions memorized within 5 minutes after 15 minutes from the start of welding. Further, after 20 minutes from the start of welding, the data of the welding condition stored in the internal memory 21 is transmitted to the external memory 151. Here, as the main data, the data of the welding condition within 20 minutes from the start of welding is memorized as one file. On the other hand, as the sub-data, there is a data of the welding condition that is transmitted every five minutes as one file, and the total memory becomes four files every five minutes from the start of welding.

Here, for example, if the user presses an operation button for stopping the welding operation 20 minutes after the start of welding, it is considered that the welding operation is normally completed, and the sub-data is eliminated. On the other hand, the master data is maintained in the external memory 151.

Next, for example, it is assumed that a power interruption occurs 12 minutes after the start of welding. In this case, as shown in Fig. 7, after 12 minutes from the start of welding, at the time before the power interruption occurs, the internal memory 21 memorizes the fusion within 10 minutes from the start of the fusion to 12 minutes after the start of the fusion. Conditional information. Further, in the main data of the external memory 151, information on the welding conditions within 10 minutes from the start of welding is stored. On the other hand, in the sub-data, the data of the welding conditions within 5 minutes from the start of welding, and the welding conditions within 5 minutes from the start of welding to 5 minutes after 10 minutes are stored as individual files. .

Also, when a power interruption occurs, the file of the master data is The data has not yet been finalized, and the sub-data has been finalized as a divided file, so it is kept in the external memory 151 without being damaged. In other words, as a sub-material, a file storing the welding conditions within 5 minutes from the start of welding, and a file storing the welding conditions within 5 minutes after 5 minutes from the start of welding are stored. Here, the control panel 20 can also be designed to delete damaged master data. Further, in the case where the internal memory 21 is a volatile memory in which the stored information cannot be held without supplying power, the data of the welding condition stored in the internal memory 21 is eliminated due to the power interruption.

<Example of data of the welding condition to be memorized>

Next, the welding conditions stored in the external memory 151 will be described. Fig. 8 is a view showing an example of data which is saved as a welding condition of the main data at the time of normal completion. In addition, FIG. 9(a) to (c) are diagrams showing an example of data stored as a welding condition of the sub-data at the time of abnormal stop such as a power interruption. Here, the description will be made with the first time being 2 minutes and the second time being 4 minutes.

In the data shown in Fig. 8, the "sequence number" is the number assigned to the welding device 10, the "year, month, and day" is the year and month when the data is recorded, and the "time" is the time at which the data is recorded. That is, the information shown in the figure is the information that was saved from 9:00 on October 12, 2012, and was saved after the welding operation was stopped after 32 minutes. In addition, "species" indicates the state of the welding operation, and memorizes one of welding start, welding, welding stop, and abnormal stop.

"Regeneration condition number" is a pre-defined weld strip The number of the piece. For example, when the regeneration condition number is "12", the values of the parameters of the welding condition are set to a welding current of 100 A, a welding voltage of 12.0 V, etc., if "12" is selected, it is set to be predetermined. The value of the welding condition. Further, in the welding operation, the user can change the welding condition using the operation box 15. In addition, "splicing current", "P current", "splicing voltage", "splicing speed", "oscillation amplitude", "oscillation speed", and "error information" are the same as those shown on the display screen of FIG. In this way, it is preferable that the stored data retains the serial number, the reproduction condition number, and the like in addition to the welding condition or the date and time when the material is memorized.

Further, the welding condition is memorized in the internal memory 21 every two minutes, and is transferred from the internal memory 21 to the external memory 151 every four minutes. In the external memory 151, the welding condition is divided into main data and sub-data to be memorized. When the welding operation is normally completed after 32 minutes, the sub-data is eliminated, and the data shown in Fig. 8 is saved as the main data.

Further, the data shown in Figs. 9(a) to (c) are sub-data held by the operator at 9 o'clock on October 12, 2012, and stopped in an abnormal stop after 12 minutes. Here, the welding condition is memorized in the internal memory 21 every two minutes, and is transmitted from the internal memory 21 to the external memory 151 every four minutes, but is internally stored as shown in Figs. 9(a) to (c). The data transmitted by the body 21 will be saved as an individual file.

The material shown in Fig. 9(a) is the data memorized in the external memory 151 after 4 minutes from the start of the fusion, and the fusion start is memorized. At the time, the welding condition after 2 minutes from the start of welding, and after 4 minutes. Further, the data shown in Fig. 9(b) is the material stored in the external memory 151 after 8 minutes from the start of welding, and the welding condition after 6 minutes from the start of welding, 8 minutes after the welding is memorized. Further, the data shown in Fig. 9(c) is the data stored in the external memory 151 12 minutes after the start of welding, and the welding conditions after 10 minutes from the start of welding, 12 minutes after the welding, and the like are memorized.

Further, 12 minutes after the start of welding, the user has stopped abnormally before the operation of the welding stop by the user. Therefore, the recording is abnormally stopped in the "species" field, and the cause of the error is recorded in the "error information" field. On the other hand, in the case of power failure (power interruption), the master data will be damaged, but the subsidiary information will remain intact. That is, the three files of FIGS. 9(a) to (c) are maintained in the external memory 151 even when the power is turned off.

Further, the operator can display the data of the welding conditions to be stored as shown in FIG. 8 and FIG. 9 on the display unit of the operation box 15, and can be converted into, for example, CSV (Comma-Separated Values). File form. In addition, the sub-data is divided into files every second time, but can be edited into a file by the sub-data editing function of the control panel 20, and can also be edited into a file by an external application.

In addition, the welding conditions shown in FIGS. 8 and 9 are examples of the welding conditions to be memorized, and for example, it is designed to memorize only one of the welding conditions shown in FIG. 8 or FIG. 9, and may be designed to memorize the above-mentioned reverse height. or Other welding conditions such as offset.

Further, in the examples shown in FIGS. 8 and 9, the error information is stored in the sub-material as shown in FIG. 9(c), but the configuration is not limited thereto. For example, it can be designed as a master data or a secondary material, and the notification is that the notification does not stop the welding operation but is an abnormal error of the TIG welding system 1.

As described above, the TIG welding system 1 is a condition for the welding condition set or changed by the user or the oscillation amplitude of the temporal change, and is stored in the internal memory 21 and the external memory 151. Here, the control panel 20 memorizes the welding condition in the internal memory 21 of the control panel 20 every other time, and transmits the welding condition from the internal memory 21 to the outside every second time longer than the first time. Memory 151. In addition, even if the welding operation is abnormally stopped due to a power interruption or the like, the welding condition stored in the external memory 151 does not disappear and the storage is maintained. Therefore, it becomes easy to manage the welding conditions for welding, and the welding quality is confirmed based on the recorded welding conditions.

Further, in the present embodiment, the welding operation is performed using one electrode, but it is also possible to design a welding operation using a plurality of electrodes such as two electrodes. When there are a plurality of electrodes, the display unit displays the welding conditions corresponding to the respective electrodes, and the user can confirm and set the welding conditions of the electrodes in the operation box 15. Further, as in the memory procedure shown in FIG. 5, the welding conditions of the respective electrodes are memorized in the internal memory 21 and the external memory 151. However, as the number of electrodes becomes larger, the amount of information to be memorized increases. Therefore, if the memory capacity of the memory means is considered, the number of electrodes is preferably 1 to 4, for example.

Further, in the present embodiment, when the welding current is DC, the polarity of the electrode and the filler wire is not investigated. In general, when the electrode is negative, it is called DCEN (Direct Current Electrode Negative), when the electrode is positive, it is called DCEP (Direct Current Electrode Positive), but when the electrode is negative (DCEN), the damage of the electrode is small. Penetration will become deeper. On the other hand, when the electrode is positive (DCEP), the effect of removing the oxidized film on the surface of the base material B which becomes the negative electrode can be obtained, that is, the effect of purifying action can be obtained.

Further, in the present embodiment, the material of the base material B is not inspected. For example, 9% N steel, stainless steel, or aluminum alloy is preferably used for the LNG storage tank, and an iron alloy or an aluminum alloy is preferable.

Further, in the present embodiment, the main data and the sub-data are designed to be stored in one external memory 151. For example, the main data and the sub-data may be designed to be stored in the individual external memory 151.

<hardware structure of control panel>

Next, the hardware configuration of the control panel 20 will be described. Fig. 10 is a view showing an example of the hardware configuration of the control panel 20.

As shown in the figure, the control panel 20 includes a CPU (Central Processing Unit) 201 which is a calculation means, and a volatile memory 202 and a non-volatile memory 203 which are memory areas. Here, the CPU 201 executes various programs such as an OS (Operating System) or an application software. In addition, the volatile memory 202 is used to memorize various programs or their execution. In the memory area such as the material, the non-volatile memory 203 is a memory area for storing input data for various programs or output data from various programs.

Further, the control panel 20 includes a communication interface (hereinafter referred to as "communication I/F") 204 for communicating with the outside, and a driver 205 for reading and writing data to and from the memory medium. 10 is only a hardware configuration example, and the control panel 20 is not limited to the configuration shown in the drawings. Further, in the control panel 20, a program for realizing the function of the memory fusion condition is stored in the non-volatile memory 203. Further, the program is loaded into the volatile memory 202, and the processing based on the program is executed by the CPU 201, whereby the processing shown in Fig. 5 and the like are realized. Further, the internal memory 21 is realized, for example, by the volatile memory 202.

Further, the program for realizing the embodiment of the present invention may of course be provided by a communication means or may be stored in a recording medium such as a CD-ROM.

The present invention has been described above using the embodiments, but the technical scope of the present invention is not limited to the above embodiments. It will be apparent to those skilled in the art that various changes and alternatives can be made without departing from the spirit and scope of the invention.

1‧‧‧TIG welding system

11‧‧‧fusion torch

12‧‧‧Two-axis slides

13‧‧‧Supply device

14‧‧‧Trolley

15‧‧‧Operator box

20‧‧‧Control panel

21‧‧‧ internal memory

30‧‧‧Splicing power supply

40‧‧‧MC power supply

121‧‧‧ horizontal sliding section

122‧‧‧Longitudinal sliding part

151‧‧‧External memory

G‧‧‧ slot

B‧‧‧Material

Claims (8)

A TIG welding system, comprising: a non-consumable electrode for generating an arc; a supply device for supplying a filler wire; a sliding member for oscillating the non-consumable electrode; a control panel for memorizing and outputting the welding condition; and an operation box for the user to perform a memory operation of the welding condition; and a memory means for squiring the non-consumable electrode when the sliding member is output from the control panel and is changed by the user using the operation box, and the welding condition is changed The amplitude of the non-consumable electrode is memorized at a predetermined time point, and the memory fusion condition is saved when the power is interrupted. The TIG welding system according to claim 1, wherein the memory means is provided to be attachable and detachable to the operation box. A TIG welding system, comprising: a non-consumable electrode for generating an arc; a supply device for supplying a filler wire; a sliding member for oscillating the non-consumable electrode; a control panel for memorizing and outputting the welding condition; and an operation box for the user to perform The memory operation of the welding condition; the first memory means, the welding condition for the memory welding every first predetermined time; and the second memory means, the second time which is predetermined in advance of the first time, Reading and memorizing the fusion of the memory in the first memory means Conditions, and the memory fusion conditions are saved when the power is interrupted. The TIG welding system according to claim 3, wherein the second memory means has: main data, all the welding conditions that should be memorized during the predetermined period are memorized as one file; and the auxiliary materials, The welding condition is memorized as a file that is divided every predetermined sampling time point. The TIG welding system according to Item 4 of the patent application, wherein, at the end of the welding operation, but the foregoing main data is not erased and saved, but the auxiliary materials are eliminated, and the power supply before the end of the welding operation When interrupted, the sub-data is stored as a divided file and is not erased. The TIG welding system according to any one of claims 3 to 5, wherein the first memory means is provided as an internal memory of the control panel, and the second memory means is provided for the operation The box can be loaded and unloaded. A recording medium recording a recording medium for a program used in a TIG welding system, the TIG welding system having: a non-consumable electrode for generating an arc; a supply device for supplying a filler wire; a slider for oscillating the non-consumable electrode; and a control panel for welding The condition is memorized and outputted; the operation box is operable for the user to perform the welding operation of the welding condition; and the TIG welding system is configured to perform the function of being outputted from the control panel and being changed by the user using the operation box. The welding condition and the welding condition which changes with time, that is, the amplitude of the non-consumable electrode when the slider oscillates the non-consumable electrode, is recorded at a predetermined time Recalling the memory means, and the memory fusion condition will be stored in the memory means when the power is interrupted. A TIG welding method is characterized in that an arc is generated by a non-consumable electrode, a non-consumable electrode is oscillated by a slider, and a filler wire is supplied by a supply device, and the memorized welding condition is output from the control panel, and the operation box can be used. The TIG welding method for performing the memory operation of the welding condition, the welding condition that is output from the control panel and is changed by the user using the operation box, and the welding condition that changes the time-dependent property, that is, the sliding member oscillates the non-consumable The amplitude of the non-consumable electrode at the time of the electrode is stored in the memory means at a predetermined time point, and the memory fusion condition is stored in the memory means when the power supply is interrupted.