KR20150104031A - Tig welding system, program and tig welding method - Google Patents

Abstract

The present invention provides a TIG welding system which stores data about the welding conditions without losing the data when a welding operation is abnormally stopped. The TIG welding system (1) comprises: a non-dissipate electrode to generate an arc; a supply unit (13) to supply a filler wire; a biaxial slider (12) to oscillate the non-dissipate electrode; a control panel (20) to store and output welding conditions; a control box (15) to allow users to run a storage operation of the welding conditions; and an external memory (151) which recalls a welding condition outputted from the control panel to be changed by users and changed with time at a predetermined timing using the control box (15), and stores the recalled welding conditions with a disconnection of power.

Description

[0001] TIG WELDING SYSTEM, PROGRAM, AND TIG WELDING METHOD [0002]

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

TIG (Tungsten Inert Gas) welding is one of the main welding methods in LNG (Liquefied Natural Gas) tanks that store liquefied natural gas. TIG welding is capable of high-quality welding while lowering the working efficiency. To solve this problem, automation of TIG welding has been progressing conventionally. Thus, although reduction of labor load is realized by automation of 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 at the time of arc welding such as TIG welding, there is a method of recording a production history by installing a general-purpose data logger or the like outside the welding apparatus, And a method of recording history. For example, the arc welding robot described in Patent Document 1 operates in a predetermined operation pattern by an operation program preliminarily taught, and welds the workpiece with predetermined welding conditions preset in each predetermined period of the operation pattern An arc welding robot comprising storage means for storing at least one of a program name, a welding spot, and measurement data at execution of an operation program as history information.

(Patent Document 1) Japanese Patent Application Laid-Open No. 2006-26655

For example, in a welding environment of an LNG tank, since the work space is narrow and high, it is not a general supply method of supplying electric power from a generator of a power plant through a power transmission line, It is necessary to secure power. In this case, it is conceivable that, for example, the welding operation is abnormally stopped due to sudden power-off or the like, and the data of the welding condition as the production history is lost.

An object of the present invention is to provide a TIG welding system capable of preserving welding condition data without loss even when the welding operation is stopped abnormally.

In order to achieve the above object, according to the present invention, there is provided a plasma processing apparatus 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 welding condition changing and welding condition changed by the user using the operation box and outputted from the control panel at a predetermined timing, And a storage means for storing the stored welding conditions at the time of power interruption.

Further, the storage means is provided so as to be attachable and detachable with respect to the operation box.

Further, the welding conditions varying with time are characterized by a deviation width of the non-consumable electrode when the slider oscillates the non-consumable electrode.

According to another aspect of the present invention, there is provided a plasma processing apparatus comprising: a non-consumable electrode for generating an arc; a supply device for supplying the filler wire; a slider for oscillating the non-consumable electrode; A first storage means for storing a welding condition used for welding at a predetermined first time, a first storage means for storing a welding condition stored in the first storage means, And a second storage means for reading and storing the welding conditions at a predetermined second time longer than one hour and storing the stored welding conditions at the time of power interruption.

The second storage means is characterized by having main data in which all the welding conditions to be stored in a predetermined period are stored as one file and sub data in which welding conditions are stored as files divided at predetermined sampling times .

Further, at the end of the welding operation, the main data is not erased but the sub data is erased. When the power is turned off before the welding operation is finished, the corresponding sub data is not erased as a divided file .

The first storage means is provided as an internal memory of the control panel, and the second storage means is detachably mountable to the operation box.

According to another aspect of the present invention, there is provided a plasma processing apparatus comprising a non-consumable electrode for generating an arc, a supply device for supplying the filler wire, a slider for oscillating the non-consumable electrode, a control panel for storing and outputting welding conditions, A program for use in a TIG welding system having a manipulation box that enables a user to perform a storage operation of a welding condition, the program comprising: a welding condition output from the control panel and changed by a user using the manipulation box; A program recorded on a recording medium for causing a TIG welding system to realize a function of storing a condition at a predetermined timing in a storage means and storing the stored welding condition in a corresponding storage means at the time of power cutoff.

In addition, in another aspect, the present invention provides a method of manufacturing a semiconductor device, comprising: generating an arc by a non-consumable electrode, oscillating the non-consumable electrode by a slider, supplying a filler wire by a feeding device, Wherein the welding condition is changed by the user using the operation box and outputted from the control panel, and the welding condition is changed with time by the user using the operation box, Is stored in the storage means at a predetermined timing, and the stored welding conditions are stored in the storage means at the time of power interruption.

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

1 is a view showing an example of a schematic configuration of a TIG welding system according to the present embodiment.
2 is a block diagram showing an example of a TIG welding system according to the present embodiment.
3 is a diagram for explaining an example of the oscillation width.
4 is a view showing an example of a screen displayed on the display section of the operation box.
5 is a flowchart showing an example of a procedure for storing the welding conditions in the internal memory and the external memory.
Figs. 6 (a) to 6 (c) are diagrams for explaining an example of a procedure of storing the welding conditions in the internal memory and the external memory.
7 is a diagram for explaining an example of a procedure of storing welding conditions in an internal memory and an external memory.
Fig. 8 is a view showing an example of data of welding conditions stored as main data at the normal end; Fig.
Figs. 9 (a) to 9 (c) are diagrams showing examples of data of welding conditions stored as subdata when an abnormal stop such as power supply interruption is performed.
10 is a diagram showing an example of the hardware configuration of the control panel.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

<Configuration of TIG Welding System>

First, the TIG welding system 1 according to the present embodiment will be described. Fig. 1 is a view showing an example of a schematic configuration of a TIG welding system 1 according to the present embodiment. 2 is a block diagram showing an example of a TIG welding system 1 according to the present embodiment. Here, TIG welding is a welding method in which an arc is generated between a base material, which is an object of welding, and a tungsten electrode by using a tungsten electrode, and the base material and the filler wire are melted and joined to the arc. The filler wire is supplied to replenish the metal to the welded portion of the base material. Further, the tungsten electrode is used as a non-consumable electrode which is not well consumed by arc heat. Hereinafter, the tungsten electrode may be referred to simply as an &quot; electrode &quot;.

As shown in Figs. 1 and 2, the TIG welding system 1 according to the present embodiment is a welding system for welding a TIG welding process in which an arc is generated from an electrode to weld a base material B, An apparatus 10 and a control panel 20 for controlling each part constituting the TIG welding system 1. The TIG welding system 1 further includes a welding power source 30 for applying a voltage to the welding torch 11 mounted on the welding apparatus 10 and generating an arc, An MC power supply 40 for energizing the fed filler wire and a cooling water circulator 50 for circulating cooling water in the welding apparatus 10. [ In the TIG welding system 1 according to the present embodiment, a generator (not shown) that supplies electric power to a device requiring electric power such as the welding power source 30 or the MC power source 40 is used to generate electric power Therefore, there is a possibility that the welding operation may stop abnormally due to a power failure or the like during the welding operation.

The welding apparatus 10 includes a welding torch 11 for holding an electrode, and a Y-axis direction in the left and right direction in Figs. 1 and 2, and a direction perpendicular to the ground in Fig. 1, And a feeding device 13 for feeding the filler wire to the portion to be welded. 1, while the welding apparatus 10 holds the welding torch 11, the biaxial slider 12, the supplying device 13, the operation box 15 to be described later, and the like, And a cart 14 running in the X-axis direction, which is a direction perpendicular to the X-axis direction. The welding apparatus 10 is provided with an operation box 15 which is held in the cart 14 and allows the user to perform storage operation of welding conditions.

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

The biaxial slider 12 as an example of a slider is connected to the welding torch 11 and is arranged in the Y axis direction, in other words, parallel to the surface of the base material B, A horizontal slide portion 121 for sliding the electrode in the width direction (lateral direction in FIG. 2) of the substrate G, that is, the electrode in the Z-axis direction, in other words, Direction) in which the electrodes are slid. The transverse slide portion 121 and the longitudinal slide portion 122 have a motor, a power transmission mechanism for transmitting the power of the motor, and the like, and slide the electrodes in the Y-axis direction and the Z-axis direction, respectively.

1, the feeder 13 includes a wire reel 132 around which a filler wire is wound and a wire reel 132 for feeding a filler wire from the wire reel 132 to the groove G through the conduit cable 131, (Feeding portion) 133 for feeding the food.

The cart 14 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 shown in Fig. As a result, the welding torch 11, the biaxial slider 12, the supplying device 13, the operating box 15, and the like move in the X-axis direction.

The operation box 15 has a plurality of operation buttons (not shown), and each operation button is pressed by the user. The operation box 15 is an operation for changing the setting of a condition (hereinafter referred to as a welding condition) , An operation for starting welding work, and the like. The operating 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 detachably mountable to the operation box 15. For example, the flash memory is used from the viewpoints of general-purpose, large-capacity, and small size, but any storage medium may be used .

It is assumed that 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 the welding conditions to be stored in the period from the start to the end of welding are stored as one file. The subdata is data in which the welding conditions are stored as files divided at predetermined sampling times. The subdivided data can be connected and made into one piece of data. In this embodiment, as an example of a predetermined period, a period from the start of welding to the end of welding is used.

Thus, when the welding operation is normally completed, the main data in which the welding conditions for the period from the start of welding to the end of welding are stored are not deleted but stored in the external memory 151 as they are. On the other hand, subdata that are a plurality of divided files are erased.

If the welding is terminated abnormally during the welding operation due to the power-off or the like before the welding operation is normally completed, the main data is not finalized but is damaged. On the other hand, the subdata is not deleted as a divided file but stored in the external memory 151 as it is.

The operation box 15 has a display section (not shown) constituted by, for example, a liquid crystal monitor or the like, and displays contents of the welding conditions and error information on the display section. The error information is information about an error occurring before the welding operation or during the welding operation. The error information includes, for example, information about an error such as an arc break, an arc stop, an electrode short circuit, a servo error, and a power supply error. Incidentally, the error information includes, for example, information about an abnormality of the distance between the electrode and the base material (hereinafter referred to as the arc length). The information on the arc length abnormality is output on the basis of an arc path visually detected by a camera or the like, a movement amount of an electrode obtained by AVC control, or the like. Here, the AVC control is a control for constantly adjusting the arc length by measuring the welding voltage and moving the welding torch 11 up and down so that the voltage is equal to a preset reference voltage.

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

Further, the control panel 20 performs control to store and output the welding conditions. The control panel 20 stores the welding conditions in the internal memory 21 of the control panel 20 during the welding operation and controls the welding conditions stored in the internal memory 21 As shown in Fig. In other words, the control panel 20 stores the welding conditions used in the welding in the internal memory 21 every predetermined first time, and sets the welding conditions stored in the internal memory 21 to a predetermined And transfers the read data to the external memory 151 at a second time. In the present embodiment, the internal memory 21 is used as an example of the first storage means. The external memory 151 is used as an example of the storage means and the second storage means.

<Description of Welding Conditions>

Next, welding conditions to be stored in the internal memory 21 and the external memory 151, which are welding conditions, will be described. The user can set or change the welding conditions using the operating box 15. The welding conditions include, for example, welding current, pulse current, MC current, welding voltage, both-end peak voltage, welding speed, Speed, peak wire feeding speed, oscillation rate, oscillation stop time, oscillation width, inversion height, shift amount, and the like.

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 AC or DC. Further, when the welding current is a direct current, the welding current may be a pulse. In other words, the pulse output differs from the setting for "straight welding" and "osilate welding". In the case of setting at the time of straight welding, the welding current is switched to a low current (hereinafter referred to as a base current) and a high current (hereinafter referred to as a peak current) according to the timing of the pulse frequency. On the other hand, in the case of the setting at the time of oscillation welding, the peak current is switched at the time of stopping the oscillation when the electrode is oscillated. In addition, since the welding conditions are different depending on the thickness and kind of the base material B, for example, the peak current value and the pulse period in the case of the pulse of the welding current are set according to the environment at the time of welding.

The MC current is a current that is energized in the filler wire during the welding operation. The welding voltage is a voltage between the electrode and the base material B during the welding operation. The peak-to-peak voltage is a voltage added to the welding voltage when the electrode stops at the oscillation end. At the time of stopping the oscillation, the AVC control is performed by the voltage at which the set value of the both-end peak voltage is added to the set value of the welding voltage.

The welding speed is the traveling speed of the cart 14 during the welding operation. The wire feeding speed is the speed at which the filler wire is fed from the feeding device 13 during inching and welding operations of the filler wire. The peak wire feeding speed is the wire feeding speed when the electrode is stopped at the oscillation end. During the oscillation stop, the wire feeding speed is changed to the speed at which the set value of the peak wire feeding speed is increased or decreased.

The oscillation rate is the speed of the electrode when the biaxial slider 12 oscillates the electrode. The oscillation stop time is a time when the electrode is stopped at the oscillation end of the left end or the right end when the electrode is oscillated, and there are the left end stop time and the right end stop time. The oscillation width is the width of deviation of the electrode when the biaxial slider 12 oscillates the electrode. In the present embodiment, an oscillation width is used as an example of a welding condition that changes over time. The details of the oscillation width will be described later.

The inversion height is a height that rises along the shape of the groove surface, and is a threshold value used for groove detection along the groove. The inversion height includes a left-end inversion height and a right-end inversion height along the left and right ends of the oscillation end. The shift amount is the amount by which the electrode moves from the oscillation end while the electrode is stopped at the oscillation end, and there are the left-end shift amount and the right-end shift amount in accordance with the oscillation end.

<Explanation of oscillation width>

Next, the oscillation width, which is a welding condition, will be described. 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 cart 14 (the direction of arrow A1). At this time, the biaxial slider 12 shakes the electrode by oscillating in the direction of the arrow B 1 and the direction of the arrow B 2, for example, so that the welding can be performed with high accuracy according to the shape of the groove of the base material B. Thus, the distance between both ends of the oscillation end when the electrode is oscillated is the oscillation width. In the example shown in Fig. 3, the distance L1 and the distance L2 at both ends of the oscillation end at some point are shown as an example of the oscillation width.

Here, since the welding spot of the base material B varies depending on the shape of the base material B, the oscillation width also changes over time. The control panel 20 determines the width to which the electrode should be moved according to the shape of the base material B and controls the biaxial slider 12 to oscillate the electrode based on the determined width. The oscillation width determined by the control panel 20 at that point is stored in the internal memory 21 or the external memory 151 every first or second time from the start of welding.

&Lt; Description of the screen displayed on the display unit &

Next, a screen displayed on the display portion of the operating box 15 will be described. Fig. 4 is a view showing an example of a screen displayed on the display section of the operating box 15. Fig. In the screen shown in Fig. 4, "welding current", "P current", "oscillation rate", "welding speed", "left end stop", "left shift" , "Welding voltage", "MC current", "oscillation width", "wire speed", "right end stop", "right shift", "right reversing height" and "positive P voltage" are displayed. The set values of the respective welding conditions are displayed next to the characters of the respective welding conditions.

Quot; P current &quot; is a set value of a peak current at the time of application of a pulse current welding, &quot; Oscillation rate &quot; is a set value of an oscillation rate, &quot;Quot; is the set value of the welding speed, &quot; left end stop &quot; is the set value of the left end stop time, &quot; left shift &quot; is the set value of the left end shift amount, . "Welding voltage" is the set value of the welding voltage, "MC current" is the set value of the MC current, "Oscillate width" is the set value of the oscillation width, "Wire speed" is the set value of the wire feeding speed, Quot; is a set value of the right end stop time, &quot; right shift &quot; is a set value of the right end shift amount, &quot; right inversion height &quot;

In the illustrated example, the welding current is 100 amperes (unit of current: A), the peak current is 0 A, the oscillation rate is 100 cm / min (cm per minute), the welding speed is 5.0 cm / Is set to 1.0 second, and the left-end shift amount is set to 0.0 mm. The value obtained by multiplying the set value by 0.05 is the actual left-end inversion height (mm) at the left-end inversion height, and is set at 0.25 mm in the case of the set value 5. Peak wire feeding speed is set to 0 cm / min when set value is 0, and peak wire feeding speed is multiplied by setting value multiplied by 10. The welding voltage was set to 12.0 volts (unit of voltage: V), the MC current was set to 40 A, the oscillation width was set to 15.0 mm, the wire feeding speed was set to 100 cm / min, the right stop time was set to 1.0 second, The value obtained by multiplying the set value by 0.05 is the rightward inversion height (mm), the set value 5 is set to 0.25 mm, and the both-end peak voltage is set to 0.0V. Here, the values set or changed by the user are displayed for each welding condition. However, as described above, the oscillation width is set to a value determined with the control panel 20 according to the shape of the base material B Are displayed.

In the screen shown in Fig. 4, the letters "abnormality of the cooling water before the start of welding" are displayed as error information about the cooling water. The character notation of &quot; origin completion &quot; turns black and white inversion (the background is black and the characters are white) when the home position return processing for returning the welding torch 11, the cart 14 and the like to the predetermined origin is completed. In the screen shown in Fig. 4, for example, an item of &quot; welding current &quot; is selected by the user pressing an operation button or the like, and the user can further change the setting value of the welding current.

&Lt; Description of the order of storing welding conditions &gt;

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. 5 is a flowchart showing an example of a procedure for storing welding conditions in the internal memory 21 and the external memory 151. Fig. Here, it is assumed that an external memory 151 is inserted into the operation box 15. It is assumed that the user sets or changes the welding conditions using the operating box 15 before the start of the welding operation or during the welding operation and the welding conditions are displayed on the display portion of the operating box 15. [ In addition, the user turns on the servomotor for controlling the position, speed, etc. of the welding torch 11 and the cart 14 and turns the welding torch 11 back to the origin do.

First, when the user presses an operation button for accepting an operation for starting the welding operation among the operation buttons of the operating box 15, the control panel 20 receives the operation of welding start through the operation box 15 (Step 101). Here, if the external memory 151 is not inserted into the operating box 15, an error is displayed on the display portion of the operating box 15. Upon receipt of the welding start operation, the control panel 20 controls the operation of the welding torch 11, the cart 14, and the like based on preset welding conditions to start the welding operation, (Hereinafter referred to as welding start time) and the set values of the welding conditions are stored in the internal memory 21 (step 102).

Next, the control panel 20 stores the welding conditions used in the welding operation in the internal memory 21 every time the predetermined first time elapses from the welding start time. Here, the control panel 20 judges 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, that is, The set welding conditions 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.

The control panel 20 stores the welding conditions stored in the internal memory 21 in the external memory 151 of the operating unit 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). Whenever the second time elapses (Yes in step 105), the control panel 20 determines the welding conditions stored in the internal memory 21 And stores the read welding conditions in the external memory 151 (step 106). Here, the welding conditions are stored in the form of main data and sub data in the external memory 151, but as the sub data, the timing for each second time is set as the sampling time, and the welding conditions are stored as the divided files for each sampling time . At the time of an abnormal stop due to the power-off or the like, the stored sub data is not deleted but stored in the external memory 151 as it is. 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. [

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. The welding condition data stored in the internal memory 21 is transferred to the external memory 151 every five minutes and stored in the external memory 151. [

Next, the control panel 20 determines whether or not an operation for stopping the welding operation has been accepted (step 107). Here, for example, when the user presses the operation button for accepting the operation for stopping the welding operation, the control panel 20 receives the operation for stopping the welding through the operation box 15 (Yes at step 107) The welding torch 11, the cart 14, and the like are stopped to stop the welding operation. 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 conditions set at that time in the internal memory 21 (step 108) do. On the other hand, if the welding stop operation is not accepted (No in step 107), the control panel 20 stores the welding conditions in the internal memory 21 every first time, The welding conditions are stored in the external memory 151 every time.

In the procedure shown in Fig. 5, the welding operation is started by pressing the operation button for accepting the welding operation start operation, and the process of storing the welding condition is also started. However, no. For example, an operation button for starting the memory may be provided separately. The process of storing the welding conditions may be started with the rise of the welding current and the welding voltage at the start of welding. In addition, when the storage process of the welding conditions is started by pressing the operation button of the welding operation start, it is prevented that the user forgets to operate or erroneously processes the welding operation. Likewise, it is preferable that the storage process of the welding conditions is also stopped by pressing the operation button for accepting the operation of stopping the welding operation.

Further, it is assumed that the first and second time intervals in which the welding conditions are stored can be changed 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 enormous, and if the welding operation is performed for a long period of time longer than half a day, no history is left in the external memory 151 . Further, the larger the data amount, the simpler the operation of confirming the recording by the user is lost. Further, from the viewpoint of accuracy of record confirmation, if the data of one welding condition is acquired at least 600 seconds, the tendency of the arc stability can be confirmed. Therefore, it is preferable that the first time is defined in the range of 1 second to 600 seconds.

In addition, when the timing for each first time stored in the internal memory 21 is a storage time, the storage time of several viewpoints from several viewpoints can be defined as one group for the second time. Here, the number of storage time points when the control panel 20 transfers the welding conditions collectively from the internal memory 21 to the external memory 151 is irrelevant. However, from the viewpoint of the accuracy of the recording confirmation by the user, It is preferable that the storage time of 50 or less is collectively transferred to the external memory 151 as one group.

&Lt; Example of the order of storing welding conditions &gt;

Next, an example of the order in which the welding conditions are stored in the internal memory 21 and the external memory 151 will be described. Figs. 6 (a) to 6 (c) and Fig. 7 are diagrams for explaining an example of a procedure of storing the welding conditions in the internal memory 21 and the external memory 151. Fig. Here, a description will be made assuming that the first time is one minute and the second time is five minutes.

Fig. 6 (a) is a view for explaining an example of a welding condition stored after 5 minutes from the start of welding. The welding condition data of the internal memory 21 shown in FIG. 6 (a) shows the welding condition data stored for five minutes every minute from the welding start time. After five minutes from the welding start time, the welding condition data stored in the internal memory 21 is transferred to the external memory 151 and is stored as main data and sub data.

Fig. 6 (b) is a view for explaining an example of welding conditions stored 10 minutes after the start of welding. The welding condition data of the internal memory 21 shown in Fig. 6 (b) shows the welding condition data stored in the external memory 151 after 5 minutes from the start of welding. It is the data stored for 5 minutes after 10 minutes. Then, the welding condition data stored in the internal memory 21 is transferred to the external memory 151 10 minutes after the welding start time. Here, as the main data, the data of the welding condition for 10 minutes from the start of welding is stored as one file. On the other hand, as the sub data, data of new welding conditions (data after 5 minutes to 10 minutes from the start of welding) are stored as another file in addition to the data of the welding condition transferred (data of 5 minutes from the start of welding) .

Fig. 6 (c) is a view for explaining an example of welding conditions stored 20 minutes after the start of welding. The welding condition data of the internal memory 21 shown in Fig. 6 (c) shows the welding condition data stored for 5 minutes after 15 minutes to 20 minutes from the start of welding. Then, after 20 minutes from the welding start time, the welding condition data stored in the internal memory 21 is transferred to the external memory 151. Here, as the main data, the data of the welding condition for 20 minutes from the start of welding is stored as one file. On the other hand, as the sub data, the data of the welding condition transmitted every 5 minutes exists as one file, and is stored as a total of 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, the welding operation is normally terminated and the sub data is erased. On the other hand, the main data is stored in the external memory 151 as it is.

Next, for example, it is assumed that power interruption occurs after 12 minutes from the start of welding. In this case, as shown in Fig. 7, the data of the welding conditions between 10 minutes and 12 minutes after the start of welding is stored in the internal memory 21 at a point in time before power interruption occurs after 12 minutes from the start of welding It is remembered. The main data of the external memory 151 stores data of welding conditions for 10 minutes from the start of welding. On the other hand, the data of the welding condition for 5 minutes from the start of welding and the data of the welding condition for 5 minutes after 5 minutes to 10 minutes from the start of welding are stored in the sub data.

When the power supply is interrupted, the main data file is not finalized, and thus the data is corrupted. Since the sub data has been finalized as a divided file, it is stored in the external memory 151 without being damaged have. That is, the file storing the welding conditions for 5 minutes from the start of welding and the welding conditions for 5 minutes after 5 minutes to 10 minutes from the start of welding are stored as subdata. Here, the control panel 20 may delete the broken main data. In the case of a volatile memory in which the stored information can not be retained unless the internal memory 21 supplies power, the welding condition data stored in the internal memory 21 is erased by power interruption.

<Example of Data of Welding Conditions to Be Remembered>

Next, the welding conditions stored in the external memory 151 will be described. 8 is a diagram showing an example of data of a welding condition stored as main data at the time of normal termination. Figs. 9 (a) to 9 (c) are diagrams showing examples of data of welding conditions stored as subdata when an abnormal stop such as power-off is performed. Here, the first time is set to 2 minutes, and the second time is set to 4 minutes.

In the data shown in Fig. 8, the &quot; exhalation number &quot; is a number assigned to the welding apparatus 10, the &quot; date &quot; is the date and time the data was recorded, and the &quot; time &quot; That is, the data shown are the data saved when the welding operation was stopped 32 minutes after the welding operation was started at 9:00 on October 12, "Type" indicates the type of the welding operation state, and one of welding start, welding, welding stop, and abnormal stop is stored.

The &quot; reproduction condition number &quot; is a number indicating a predetermined welding condition. For example, when the reproduction condition number is &quot; 12 &quot;, values of respective parameters of the welding conditions such as a welding current of 100A and a welding voltage of 12.0V are determined. When &quot; 12 &quot; is selected, Respectively. In addition, during the welding operation, the user can change the welding conditions by using the operating box 15. The "welding current", "P current", "welding voltage", "welding speed", "oscillation width", "oscillation rate", and "error information" are the same as those shown on the display screen of FIG. As described above, it is preferable to leave the exhalation number, the regeneration condition number, and the like in the stored data in addition to the welding condition and the date and time when the data is stored.

The welding conditions are stored in the internal memory 21 every two minutes and transferred from the internal memory 21 to the external memory 151 every four minutes. In the external memory 151, the welding conditions are stored by dividing into the main data and the sub data. If the welding operation normally ends after 32 minutes, the sub data is erased and the data shown in FIG. 8 is stored as main data.

The data shown in Figs. 9 (a) to 9 (c) are sub data stored when the operator starts welding at 9:00 on October 12, 2012 and stops abnormally after 12 minutes. Here, the welding conditions are stored in the internal memory 21 every two minutes and transferred from the internal memory 21 to the external memory 151 every four minutes. However, as shown in Figs. 9 (a) to 9 (c) 21 are stored as other files.

The data shown in Fig. 9 (a) is data stored in the external memory 151 four minutes after the start of welding, and welding conditions for two minutes and four minutes from the start of welding at the start of welding are stored. The data shown in Fig. 9 (b) is data stored in the external memory 151 eight minutes after the start of welding, and the welding conditions after six minutes and eight minutes from the start of welding are stored. The data shown in Fig. 9 (c) is data stored in the external memory 151 after 12 minutes from the start of welding, and welding conditions after 10 minutes and 12 minutes from the start of welding are stored.

Furthermore, since the welding was stopped before the welding operation was stopped by the user 12 minutes after the start of welding, an error was recorded in the column of "type", and the cause of the error was recorded do. On the other hand, when the power is cut off (main power is turned off), the main data is in a broken state, but the sub data remains. That is, the three files shown in Figs. 9 (a) to 9 (c) are stored in the external memory 151 as they are even when the power supply shutdown is stopped.

The operator can display the stored welding condition data shown in Figs. 8 and 9 on the display unit of the operation unit 15, and further, for example, a file such as CSV (Comma-Separated Values) Format. Although the subdata is divided into files for every second time, it may be edited as one file by the subdata editing function of the control panel 20, or may be edited as one file by an external application.

The welding conditions shown in Figs. 8 and 9 are examples of the welding conditions to be stored. For example, only one of the welding conditions shown in Figs. 8 and 9 may be stored, and the above- Or the like may be further stored.

In the examples shown in Figs. 8 and 9, the error information is stored as the sub data shown in Fig. 9 (c), but the present invention is not limited to such a configuration. For example, in the main data or the sub data, the welding operation is not stopped but an error indicating the abnormality of the TIG welding system 1 may be stored.

As described above, the TIG welding system 1 stores in the internal memory 21 and the external memory 151 conditions relating to the welding conditions set or changed by the user or the oscillation width varying with time. Here, the control panel 20 stores the welding conditions in the internal memory 21 of the control panel 20 every first time, sends the welding conditions from the internal memory 21 every second time longer than the first time, (151). Even when the welding operation is abnormally stopped due to the power-off or the like, the welding conditions stored in the external memory 151 are preserved 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 the present embodiment, the welding operation is performed using one electrode, but a welding operation may be performed using a plurality of electrodes such as two electrodes. When there are a plurality of electrodes, the welding conditions according to the respective electrodes are displayed on the display unit, and the user can confirm and set the welding conditions of the respective electrodes in the operating box 15. [ 5, the welding conditions of the respective electrodes are stored in the internal memory 21 and the external memory 151. In this case, However, the larger the number of electrodes, the larger the amount of information to be stored. Therefore, in consideration of the storage capacity of the storage means, the number of electrodes is preferably 1 to 4, for example.

In this embodiment, when the welding current is DC, the polarity of the electrode and the filler wire does not matter. In general, DCEN (Direct Current Electrode Negative) is called when the electrode is negative and DCEP (Direct Current Electrode Positive) when the electrode is positive. However, when the electrode is negative (DCEN) Is deepened. On the other hand, when the electrode is positive (DCEP), the effect of the cleaning action, that is, the action of removing the oxide film on the surface of the base material B as the negative electrode can be obtained.

In this embodiment, the material of the base material B does not matter, but for example, 9% N steel, stainless steel, or aluminum alloy is often used for the LNG tank, and an iron-based alloy or an aluminum- desirable.

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

<Hardware configuration of control panel>

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

As shown in the figure, the control panel 20 includes a CPU (Central Processing Unit) 201 which is a computing unit, a volatile memory 202 which 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 nonvolatile memory 203 is a storage area for storing input data for various programs and output data from various programs, etc. The volatile memory 202 is a storage area for storing various programs, to be.

The control panel 20 also includes a communication interface (hereinafter referred to as &quot; communication I / F &quot;) 204 for communicating with the outside, a driver 205). 10 is only a hardware configuration example, and the control panel 20 is not limited to the illustrated configuration. In the control panel 20, a program for realizing the function of storing the welding conditions is stored in the nonvolatile memory 203. [ Then, this program is loaded into the volatile memory 202, and the processing is executed by the CPU 201 in accordance with this program, whereby the processing shown in Fig. 5 and the like are realized. 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 communication means but also by recording it on a recording medium such as a CD-ROM.

While the present invention has been described with reference to the embodiment, the technical scope of the present invention is not limited to the above embodiment. It will be apparent to those skilled in the art that various changes and alternatives may be employed without departing from the spirit and scope of the invention.

1: TIG welding system 10: welding device
11: welding torch 12: two-axis slider
13: Feeder 14: Cart
15: Operation box 20: Control box
21: internal memory 30: welding power source
40: MC power 151: External memory

Claims (9)

A non-consumable electrode for generating an arc,
A feeder for feeding the filler wire,
A slider for oscillating the non-consumable electrode,
A control panel for storing and outputting welding conditions,
An operation box allowing the user to perform a storage operation of welding conditions,
A storage means for storing the welding conditions changed by the user and the welding conditions varying with time at a predetermined timing outputted from the control panel and changed by the user using the operation box and storing the stored welding conditions at power-
And a TIG welding system.
The method according to claim 1,
Wherein the storage means is detachably mountable to the operation box.
3. The method according to claim 1 or 2,
Wherein the time varying welding condition is a deviation width of the non-consumable electrode when the slider oscillates the non-consumable electrode.
A non-consumable electrode for generating an arc,
A feeder for feeding the filler wire,
A slider for oscillating the non-consumable electrode,
A control panel for storing and outputting welding conditions,
An operation box allowing the user to perform a storage operation of welding conditions,
A first storage means for storing a welding condition used for welding at a predetermined first time,
A second storage means for reading and storing the welding condition stored in the first storage means at a predetermined second time longer than the first time,
And a TIG welding system.
5. The method of claim 4,
Wherein the second storage means has main data in which all the welding conditions to be stored in a predetermined period are stored as one file and sub data in which welding conditions are stored as files divided at predetermined sampling times TIG welding system.
6. The method of claim 5,
The main data is not erased while the sub data is erased and at the time of power interruption before the welding operation is finished, the sub data is stored as a divided file without being erased TIG welding system.
7. The method according to any one of claims 4 to 6,
The first storage means is provided as an internal memory of the control panel,
And said second storage means is detachably mountable to said operation box.
A slider for oscillating the non-consumable electrode; a control panel for storing and outputting welding conditions; and a controller for controlling the welding conditions to be stored A program for use in a TIG welding system having an operating box,
And the welding condition changed by the user and the welding condition changed by the user by using the operation box and stored in the storage means at a predetermined timing and at the same time, A program recorded on a recording medium for realizing a function to be stored in a storage means in the TIG welding system.
Consuming electrode is oscillated by the slider, the filler wire is supplied by the supplying device, the stored welding condition is outputted from the control panel, and the user performs welding A TIG welding method capable of storing and manipulating conditions,
And the welding condition changed by the user and the welding condition changed by the user by using the operation box and stored in the storage means at a predetermined timing and at the same time, The TIG welding method is stored in the storage means.

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