JP3233772B2 - Welding work simulator device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding operation simulator for supporting the setting of welding operation conditions.

[0002]

2. Description of the Related Art In the case of performing welding by arc welding by buttping materials to be welded, there are a case where welding is performed manually and a case where welding is automatically performed by an automatic welding machine. Here, in the case where welding is performed by an automatic welding machine, a welding tip holding a welding wire is attached to a movable carriage together with a shield nozzle, which is a nozzle for spraying shielding gas, and arc welding is performed by controlling the movement of the movable carriage.

That is, a welding tip holding a welding wire is arranged in a shield nozzle, and the distance between the tip of the welding wire and a butt portion of a material to be welded is automatically sent out by a wire feeder which is an automatic welding wire adjusting device. And applying a voltage between the welding wire and the material to be welded to cause an arc discharge between the welding wire and the material to be welded. Move and go welding.

[0004] In performing arc welding with such an apparatus, in order to perform high quality and highly reliable welding, the type of the material to be welded, the groove shape of the material to be welded, and the plate of the material to be welded are used. Various conditions determined according to the thickness and the welding position must be optimally set, and the work must be performed under those conditions.

[0005] That is, when performing arc welding, the type of wire, wire diameter, and the like according to the type of material to be welded, the groove shape of the material to be welded, the thickness of the material to be welded, and the welding position.
Appropriate conditions to be used, such as the type of shielding gas, arc current value, arc voltage value, and welding speed, are determined. Among these conditions, the arc current value, arc voltage value, and welding speed are called welding conditions in a narrow sense.

By the way, when performing arc welding,
Given this welding condition in a narrow sense, it is not possible to estimate what the actual arc state and welding bead shape will be when welding is performed under these welding conditions. for that reason,
The arc condition and the weld bead shape can be known for the first time when the arc welding is performed by giving the welding conditions in the narrow sense.

Therefore, when setting the above welding conditions,
If you are not a skilled technician, make sure that the set conditions are appropriate,
It cannot be determined whether or not. Moreover, even a skilled technician may unintentionally mistakenly set a value.In such a case, it is necessary to confirm that there was a mistake in setting only after welding was actually performed under the set conditions. Knowing this is not only a problem in quality control, but also leads to poor processing of the product, and is a waste of working time, causing a great hindrance in productivity.

[0008]

As described above, when welding is performed by an automatic welding machine, it is necessary to set welding conditions to optimum values in advance. The wire type, wire diameter, shield gas type (gas type), arc current value, arc voltage value,
It is necessary to set welding conditions such as the welding speed, but for convenience of setting, these are given in a table format in the conventional apparatus.

Among them, the arc current value, arc voltage value and welding speed are called welding conditions in a narrow sense. By the way, given these narrowly defined welding conditions, when welding is performed under these conditions, what happens to the arc state and the weld bead shape cannot be estimated from the set numerical values.

Therefore, when these welding conditions are incorrectly set or when the set welding conditions are inappropriate, it is known that the welding conditions are inappropriate only at the stage of welding and it is known in advance. I can't. This is not only a problem in quality control, but also leads to poor processing of the product,
In addition, the work time is wasted, which causes a great hindrance in productivity.

Therefore, an object of the present invention is to automatically simulate a welding state under welding conditions to be performed before performing welding, and to determine in advance whether or not the conditions are appropriate. It is an object of the present invention to provide a welding condition simulator device which can perform the welding.

Further, a second object of the present invention is to show the set welding conditions, arc current and arc length, and whether these conditions are appropriate or not, and if so, why. An object of the present invention is to provide a welding condition simulator device which is effective for training of unskilled persons.

[0013]

In order to achieve the above object, the present invention is configured as follows. In other words, in order to achieve the first object, the type and diameter of the wire used for arc welding, the welding speed, the distance between the tip supporting the wire and the base material to be welded, the feeding of the wire sent out through the tip, Speed, and welding condition setting means for providing the welding conditions of the arc welding such as the applied arc voltage value, using the working conditions given by the welding condition setting means, each element of the working conditions theoretically determined and welding current, A first calculation function for obtaining a welding current, a wire protrusion amount, and an arc length by a formula indicating a relationship between a wire protrusion amount from a tip and an arc length of an arc generated on a wire tip side, and a welding speed and a wire feed amount. Calculation for obtaining a bead shape approximated to half the area of the ellipse by a relational expression utilizing that the relation of the welding speed with respect to the area of the ellipse is equal to half the area of the ellipse And a state diagram showing the state of the wire protruding with respect to the welding position of the base material to be welded and the state of the arc generated at the wire tip side based on these calculation results, and the welded state obtained by the arc welding under the processing conditions. An arithmetic unit having a function of creating a diagram showing a state of a bead shape on a base material, and a display unit for displaying a diagram obtained by the arithmetic unit are provided.

Further, the arithmetic means is provided with a function of creating character information of welding conditions and at least the welding current obtained, the voltage of the generated arc and the arc length, and the display means is provided with the function obtained by the arithmetic means. A function of displaying a figure and the character information is provided.

In order to achieve the second object, the arithmetic means uses a comparison criterion for checking an appropriate range of the welding conditions set by the welding condition setting means, and the set welding conditions are used. In addition to checking whether or not it is proper, a welding condition propriety checking function for creating a comment according to the result is added, and the display means is configured to display the figure and the comment obtained by this calculating means. .

[0016]

In a configuration for achieving the first object, in order to simulate a normal welding operation, a welding speed (trolley moving speed) vs.
Construction condition information such as the tip-base metal distance 1, the wire feed speed Vw, the arc voltage VA, the type of wire, and the wire diameter are given to the arithmetic means.

The state of arc welding when the selected wire type and wire diameter are used is determined in advance using the set values of the tip-base metal distance, the wire feed speed and the arc voltage. A calculation is performed using a relational expression between these parameters to determine the welding current, wire protrusion amount le and arc length la, and a state diagram showing the state of arc welding in this state is drawn and displayed. Further, the bead shape is simulated in consideration of the set value of the welding speed, the set value of the wire feeding speed and the set value of the arc voltage, and the shape is displayed as an image.

When the construction conditions given by the setting means are changed, the calculation means performs calculations under the new conditions, and redraws and displays the figure. As described above, the display diagram is updated each time the construction conditions are changed.

The calculating means creates character information of the welding conditions, at least the obtained welding current, the voltage of the generated arc and the arc length, and the display means displays the figure and the character information obtained by the calculating means. .

When the welding conditions are set by the setting means for setting the welding conditions as described above, a simulation calculation based on a relational expression between these parameters which has been set in advance is performed, and a state diagram near the generated arc is obtained. (Tips, nozzles, wires, arcs, base materials) and bead shape diagrams, as well as the welding conditions set by the setting means and the calculated values of the arc current and arc length obtained by calculation. Therefore, the welding conditions (welding current (arc current), arc voltage,
Since whether or not the welding speed is appropriate is displayed in the form of an image indicating the state of construction, it is possible to intuitively judge by seeing this, so that trouble due to welding can be prevented.

Further, in the configuration for achieving the second object, in addition to the above, the calculating means sets the welding conditions by using a comparison standard for examining an appropriate range of the welding conditions set by the welding condition setting means. Whether or not the conditions are appropriate is checked, and a comment is created according to the checked result. Then, the figure and the comment obtained by the calculation means are displayed on the display means.

Since the display welding condition propriety checking function is added as described above, a comment corresponding to the result of checking whether the set welding condition is appropriate is displayed on the display means, so that the set welding condition is good. Or bad, and
If bad, what is wrong can be displayed as a comment, so that in addition to the above effects, further effects can be expected for training of unskilled persons.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. (First Embodiment) FIG. 1 is a block diagram showing one embodiment of the present invention. In FIG. 1, 1 is a calculator, 2 is a display unit of the calculator 1, and 3 is a welding condition setting device. For example, a personal computer, a workstation, or the like may be used as the arithmetic unit 1. In a personal computer, a workstation, or the like, various calculations are performed by a program process using a microprocessor as a control center, and an arc welding simulation described later is performed.
The result can be imaged by a graphic program and displayed on the display unit 2.

The display unit 2 may be any display suitable for displaying the result as an image by using the simulation function of the arithmetic unit 1. For example, a character and graphic such as a CRT display, a liquid crystal panel display, and a plasma display may be used. Anything that can display is available.

The welding condition setting unit 3 includes a welding speed (trolley moving speed) (ws) of the automatic welding machine to be simulated, a tip-base metal distance (l) of the automatic welding machine, and a wire feed of the automatic welding machine. Speed (Vw), arc voltage value (V
A), shielding gas type used for welding (CO ₂ (carbon dioxide) or CO ₂ + Ar (mixed gas of carbon dioxide and argon gas)), type of wire used for welding (solid wire or cored wire), used for welding This is a device for setting conditions such as the wire diameter (d = 1.2mmφ, 1.4mmφ, 1.6mmφ) to be performed, and for instructing the start / end of welding (simulation execution instruction), and setting the welding speed ws. Dial knob 3a for setting the tip-base distance l, dedicated dial knob 3c for setting the wire feed speed Vw, and dedicated dial knob 3c for setting the arc voltage value VA.
and d, whether to use a shielding gas species (CO _2, CO ₂
Switch 3e for selecting whether to use + Ar, the type of wire (whether to use solid wire or not)
Switch 3 to select whether to use a cored wire)
j, a switch 3f for selecting a wire diameter d = 1.2 mmφ, a switch 3g for selecting a wire diameter d = 1.4 mmφ, a switch 3h for selecting a wire diameter d = 1.6 mmφ, and a switch 3j for indicating welding start / end of welding. Is provided on the operation panel surface.

Each of the dial knobs 3a to 3d is a knob for variably operating the resistance value of a corresponding volume (variable resistor). Each volume is, for example, a voltage dividing resistor applied to both ends with a predetermined potential difference. In addition, the set value (set voltage) can be continuously changed by changing the voltage division ratio by changing the operation of the dial knob. Therefore, by variably operating these dial knobs 3a to 3d, the set values of the welding speed ws, the tip-base metal distance l, the wire feeding speed Vw, and the arc voltage value VA can be given without any change. These set values of the welding speed, the tip-base metal distance, the wire feeding speed, and the arc voltage are output as analog signals.

The switches 3e to 3e of the welding condition setting device 3
Reference numeral 3j outputs two kinds of voltages, a predetermined DC voltage and a voltage of zero volt, by a switching operation. The predetermined DC voltage is a signal of a logic level "H" of a digital signal. It is used as a signal of a logical level "L" of a digital signal. Therefore, these shielding gas types, wire types, and wire diameters (1.2 mmφ, 1.4 mm
φ, 1.6 mmφ) and welding start / end signals are digital signals.

These signal sources are housed in one housing. The A / D converter 4 is a circuit for converting an analog signal into a digital signal. The A / D converter 4 converts the analog signal output from the welding condition setting device 3 into a digital signal and supplies the digital signal to the arithmetic unit 1. This device converts the set values of the tip-base metal distance l, the wire feed speed Vw, and the arc voltage value VA into digital signals and provides them to the arithmetic unit 1.

The digital signal input device 5 is provided with a digital signal (switches 3e to 3e) output from the welding condition setting device 3.
3j) and processes it as parallel data.
Output to

In the present apparatus, the welding condition is set by the welding condition setting device 3 so that the computing unit 1 performs an arc phenomenon simulation based on the set welding conditions.
The result is graphically displayed on the display unit 2 together with the data of the set welding conditions.

FIG. 2 shows an example of this display. FIG. 2 is a specific display example on the display unit 2 of the arithmetic unit 1. In the figure, 6 is a welding tip in a welding machine, 7 is a wire, 8 is an arc, 9 is a shield nozzle, 1
0 is a base material to be welded, and 11 is a weld bead.

A wire 7 is fed out from the tip of the welding tip 6, and the tip of the wire 7 is arranged to face the welded portion of the workpiece 10 to be welded. An arc 8 is generated between the wire 7 and the base material 10 to be welded. The shield nozzle 9 surrounds the welding tip 6 and the wire 7 and blows out a shielding gas to shield the arc welded portion with the shielding gas to prevent oxidation and the like.

The image graphically displayed is a cross-sectional view showing the state of welding, and the shape of the weld bead 11 on the base material 10 to be welded after welding obtained as a result of welding under the conditions. .

In FIG. 2, a base material 10 to be welded is disposed below, and a welding tip 6 is disposed on the upper surface thereof.
A state in which a wire 7 is protruded from the welding tip 6 and an arc 8 is generated between the tip thereof and the base material 10 to be welded is shown in the upper right area of the screen, and the base material to be obtained after the construction is shown in the area below the upper part. The shape of the weld bead 11 on 10 is shown in a sectional view.

This graphic is drawn based on the simulation result, and in order to draw this figure,
The arithmetic unit 1 performs the following simulation.
That is, in this device, the welding condition setting device 3
By setting welding conditions, a simulation is performed based on the set conditions. At this time, since an analog signal is calculated, the parameters and symbols are defined as follows.

Among the welding conditions set by the welding condition setting unit 3, the welding speed is set to ws [mm / min], the distance between the tip and the base material is set to l [mm], and the wire feed amount is set to Vw [mm / sec]. ],
The arc voltage is VA [V], and the wire diameter is d [mmφ].

FIG. 3 shows a state in which the wire 7 protrudes from the welding tip 6 and the arc 8 flows from the tip toward the base material 10 to be welded. And their symbols are as defined below.

That is, la is the arc length, which is the length of the arc 8 generated from the tip of the wire 7 toward the base metal 10 to be welded. Also, le is the amount of wire protrusion, and is the protrusion length of the wire 7 protruding from the welding tip 6. Va is a true arc voltage, and is a potential difference of the arc 8 generated from the tip of the wire 7 toward the base metal 10 to be welded.

Ve is a voltage drop generated by the arc current i at the wire protruding portion. If an arc having an arc length la is generated when the wire protrusion length is le, a true arc voltage at this time is Va, and an arc current i (welding current) flows i. The generated voltage drop is V
Assuming that e, there is the following relationship among VA, Va, and Ve.

VA = Va + Ve (1) From the wire diameter d, the wire feed speed Vw, and the wire protrusion length le, the arc current i, which is the welding current, has the following equation (2).

[0041]

(Equation 1)

Here, k1, k2 and k3 are constants.
In the case of a solid wire, the wire diameter d is a given value as it is, and in the case of a cored wire, the wire diameter d is multiplied by a value of 0.8 to 0.95.

The voltage drop generated at the wire protruding portion due to the arc current i has the following relationship (3). Ve = k4 ・ le ・ ik5 ・ v / i (3) where k4 and k5 are constants.

From the arc voltage VA and the voltage drop Ve at the wire protruding portion, the true arc voltage Va is given by the following (4).
It is obtained by the formula. Va = VA-Ve (4) The arc length la has the relationship of the following equation (5).

La = (Va−k6 · ik7) / k8 (5) where k6, k7, and k8 are constants, and k6 differs depending on the type of the shielding gas (CO ₂ or CO ₂ + Ar).

The wire protrusion length le is given by: le = l-
If the wire protrusion length le obtained from this relationship is given to equation (2) and the operation is repeated, the wire protrusion length le and the arc length la converge to constant values.

Since the arc length la and the wire protrusion length le are obtained as described above, the relationship between l, la and le, including the set value of the tip-base metal distance l, is shown in the right half of FIG. And, as shown in FIG. 3, a welding operation state diagram reflecting the dimensional relationship is drawn and displayed as an image.

Next, the bead shape is simulated by the upper half of the ellipse as shown in FIG. If the radius in the major axis direction of this ellipse is a and the radius in the minor axis direction is b, the area of the upper half of the ellipse is π
Given by a · b / 2. The welding speed ws is equal to this area and the wire feed amount (d / 2) ² π · Vw. That is, (π · a · b / 2) = (d / 2) ² π · Vw / ws (6) Further, if the arc voltage VA is low, the weld bead is convex, so b = k9−k10 · VA (7) Here, k9 and k10 are constants.

From the equations (6) and (7), a radius a in the major axis direction and a radius b in the minor axis direction are obtained.
Is drawn on the welding line of the base metal to be welded, and is drawn as the obtained bead shape in the lower part of the right area of FIG.

These calculations, plotting, and display are repeated until the welding end signal is turned on. Thus, if the various condition settings are changed, the welding state after the change can be immediately graphically displayed together with the current setting condition values.

Next, the operation of the present apparatus having the above configuration will be described. FIGS. 4 and 5 show flowcharts of the operation of the present apparatus, and the following description will be based on this. When the present apparatus is operated, the arithmetic unit 1 first temporarily sets the wire protrusion length le (S1). For this, a specific numerical value is prepared in advance as an initial setting value, for example, set to 15 mm as an initial value.

Then, the arithmetic unit 1 waits for the welding start / welding end switch 3j of the welding condition setting unit 3 to be operated to the welding start side (waits for the welding start to be turned on) (S
2). When the welding start switch 3j is turned on by the operator's operation, a signal indicating that the welding start switch 3j is turned on is given from the welding condition setting unit 3 to the arithmetic unit 1 via the digital signal input unit 5, so that The arithmetic unit 1 thereby performs a simulated arithmetic operation, and sets the shielding gas type (CO ₂ or CO ₂ + A) set in the welding condition setting unit 3.
r), wire type (solid wire or cored wire), and wire diameter d (1.2 mm, 1.4 mm, 1.6 mm)
Is set through the digital signal input device 5 (S3).

The arithmetic unit 1 converts the analog set values of the welding speed ws, the tip-base metal distance l, the wire feed speed Vw, and the arc voltage value Va set in the welding condition setting unit 3 into A / A.
The data is fetched through the D converter 4 (S4).

Next, the arithmetic unit 1 converts the analog quantities taken in step S4 into respective physical quantities (S5).
An example is shown in FIG. In each of the figures, the horizontal axis represents the input voltage, and the vertical axis represents (a) the welding speed ws, (b) the tip-base distance l, (c) the wire feed speed Vw,
(D) shows the arc voltage VA. The input voltage is converted into a physical quantity corresponding to the vertical axis.

Next, the welding current i is calculated from the set wire diameter d, wire feed speed Vw and wire protrusion length le based on the equation (2) (S6). here,
The value of the wire diameter d to be substituted into the equation (2) is a value obtained by multiplying d by a value of 0.8 to 0.95 when the wire to be used is a solid wire or in the case of a cored wire.

Next, the voltage drop caused by the arc current at the wire protruding portion is obtained by calculation based on the equation (3) (S7). Further, the true arc voltage Va is obtained from VA and Ve by the equation (4) (S8), and the arc length la is calculated by the equation (5).
It is determined according to the equation (S9).

Next, the arithmetic unit 1 determines the wire protrusion length le from the relationship of le = l-la (S10), returns the obtained wire protrusion length le to step S5, and repeats the calculation up to step S10 described above. . As a result, the wire protrusion length le and the arc length la converge to constant values.

Since the arc length la and the wire protrusion length le have been obtained as described above, the arithmetic unit 1 includes the relationship between l, la and le, including the set value of the tip-base metal distance l. A state diagram is drawn and shown according to its size, as shown in the right region of FIG. 2 and FIG. 3 (S21).

Next, the arithmetic unit 1 obtains a and b by performing calculations based on the equations (6) and (7).
Simulate with the upper half of the ellipse. Then, the right and lower figures of FIG. 2 are drawn as a bead shape. Also, a list of welding conditions is displayed in characters in the left half area of the screen in FIG. 2 (S2).
2).

The arithmetic unit 1 performs these calculations and the plotting display by using a welding start / end switch 3 of the welding condition setting unit 3.
By the operation of j, it repeats until the welding end signal comes (S
23). Then, by performing the setting operation of the welding condition setting device 3 to change the welding condition, the state under the changed condition is immediately simulated, and an image indicating the state is displayed. Whether the welding conditions (welding current (arc current), arc voltage, welding speed) to be performed are appropriate can be intuitively known before construction.

As described above, by using the present simulator, whether or not the welding conditions (welding current (arc current), arc voltage, welding speed) to be carried out are appropriate is displayed in the form of an image showing the working state. By doing so, it is possible to intuitively judge by seeing this, and it is possible to prevent troubles due to welding work.

Particularly for unskilled welding users, it is important to understand how changes in parameters such as the wire feed speed, arc voltage, and tip-base metal distance affect welding development (including arc phenomena). It is difficult to do this, but by using this simulator, it can be understood visually.

In the present apparatus, the signals giving the welding speed, the tip-base material distance, the wire feeding speed and the arc voltage given to the arithmetic unit 1 are analog quantities, and their magnitudes are changed by changing the variable resistors. Can be changed, and as shown in FIG. 6, the magnitude of the signal such as the welding speed and the analog amount are in a monotonically increasing relationship.

The type of the shielding gas, the type of the wire and the diameter of the wire are set to a high level by the digital signal of the selected parameter. 1.2 mmφ,
(1.4 mmφ, 1.6 mmφ, etc.), the selected parameter can be recognized by checking which parameter signal information is at a high level.

Then, analog signals of the welding speed, the tip-base metal distance, the wire feeding speed and the arc voltage given to the arithmetic unit 1 are taken into the arithmetic unit 1 via the A / D converter and set to the set welding. Recognize the speed, tip-base distance, wire feed speed, and arc voltage, and select the type of shielding gas, wire type, and wire diameter. Utilizing the fact that there is a certain relationship between the distance between the base material and the arc voltage, the arc length la and the wire protrusion length le are calculated from this relationship, and the wire protrusion from the tip together with the vicinity of the tip of the welding torch is calculated. Long l
arc length l from the wire corresponding to e to the base metal from the wire tip
Draw an arc with a length corresponding to a
Was displayed. Further, the welding speed ws is taken in, the bead shape is calculated from the welding speed ws, the wire feeding speed and the arc voltage, and displayed on the display unit 2 of the calculator 1.

Then, the analog and digital signals are fetched, and the arc length la and the wire protrusion length le corresponding to the type of the shielding gas, the type of the wire and the wire diameter d are obtained by calculation.
Then, the above-mentioned processing of drawing a wire corresponding to the wire protrusion length le from the tip and an arc having a length corresponding to the arc length la from the wire tip to the base metal is repeated together with the figure near the tip of the welding torch. So that figures are displayed according to the latest settings.

In addition, in order to quantitatively understand the welding condition, information on the selected shielding gas type, wire diameter, tip-base metal distance, wire feed speed, arc current, etc. Information such as values, arc voltage values, and arc lengths are also displayed in characters.

Therefore, according to the present invention, the welding simulation can be easily performed by simplifying the configuration and the simulation result can be displayed in a diagram, so that the welding conditions (welding current (arc current), arc voltage, welding speed) to be applied can be obtained.
Can be known in the form of an image indicating the state of work, and thus the appropriateness of the set welding conditions can be intuitively determined from this. Therefore, trouble in welding work can be prevented.

In the above example, according to the latest setting contents,
Simulate the welding situation under the set conditions, display the arc welding state diagram including the arc state under the conditions, and quantitatively understand the welding state,
Information on the selected shield gas type, wire diameter, tip-base metal distance, wire feed speed, arc current value, arc voltage value, arc length, etc. are also displayed in characters, so let's construct Whether welding conditions (welding current (arc current), arc voltage, welding speed) are appropriate can be intuitively determined from the image showing the construction state, but if it is inappropriate If the reason is understood, the effect of further improving skills can be expected even when training unskilled persons. An embodiment in which such effects can be obtained will be described below.

(Second Embodiment) FIG. 8 is a block diagram showing one embodiment of the present invention. In FIG. 8, 1a is a calculator, 2 is a display unit of the calculator 1a, and 3 is a welding condition setting device.

These components in the second embodiment are basically the same as the arithmetic unit 1, the display unit 2, and the welding condition setting unit 3, which are the components having the same names in the first embodiment. However, the arithmetic unit 1a according to the second embodiment has the same function as the arithmetic unit 1 according to the configuration of the first embodiment, and furthermore, there is no case where the arc current and the arc voltage are within the appropriate range based on the result of further simulation. In some cases, a function of creating a comment and displaying the comment on the display unit 2 is provided.

The current / voltage appropriate condition is set in the arithmetic unit 1a as a necessary reference for comparison. The range of the current / voltage appropriate condition is based on, for example, the experience of a skilled person or an experimental value. Originally set in advance. Further, the arithmetic unit 1a is provided with a function of comparing with this comparison criterion, selecting an optimal comment according to the result, and displaying the selected comment on the display 2.

The comment is set in advance, and “welding conditions are appropriate”, “the arc current is low”,
“The arc current is correct but the arc voltage is too high.”
I have prepared a comment like that. Then, when it is determined that the arc current is within the appropriate range, a comment “Welding conditions are appropriate” is selected and displayed on the display unit 2. The message "The current is low." Is selected and displayed on the display 2. Also, if the arc current is within the appropriate range according to the comparison standard but the arc voltage is too high, "The arc current is appropriate." Is too high. "Is selected and displayed on the display unit 2.

The present apparatus having the above-described configuration sets the welding condition by the welding condition setting device 3 to thereby set the arithmetic unit 1a.
Performs an arc phenomenon simulation based on the set welding conditions, graphically displays the result, and displays it on the display unit 2 together with the data of the set welding conditions.

This display is, for example, as shown in FIG. 2 as in the first embodiment, and is a specific display example on the display unit 2 of the arithmetic unit 1a. In the drawing, a wire 7 is fed out from a tip of a welding tip 6 in a welding machine, and the tip of the wire 7 is arranged to face a welded portion of a base material 10 to be welded, and an arc applied to the wire 7 and the base material 10 to be welded. A state in which an arc 8 is generated between the wire 7 and the base material 10 to be welded by the voltage is illustrated. Shield nozzle 9 is welding tip 6
And the wire 7 are blown out, and a shielding gas is blown out to shield the arc welded portion with the shielding gas to prevent oxidation and the like.

The image graphically displayed is a cross-sectional view showing the state of welding and the shape of the weld bead 11 on the base material 10 to be welded obtained after welding under the conditions. .

In FIG. 2, the base material 10 to be welded is arranged below, the welding tip 6 is arranged on the upper surface side, the wire 7 protrudes from the welding tip 6, and the tip of the tip 7 and the base material 10 The state in which the arc 8 is generated between the two is shown in the upper right area of the screen, and the area under the arc 8 is a cross-sectional view showing the shape of the weld bead 11 on the base material 10 to be welded obtained after construction.

This graphic is drawn based on the simulation result, and in order to draw this figure,
The arithmetic unit 1a performs the same simulation as in the first embodiment.

That is, by setting welding conditions in the welding condition setting device 3, a simulation is performed based on the set conditions. At this time, since an analog signal is calculated, the parameters and symbols are set as follows. , Shall be defined.

Among the welding conditions set by the welding condition setting device 3, the welding speed is set to ws [mm / min], the tip-base material distance is set to l [mm], and the wire feed amount is set to Vw [mm / sec]. ],
The arc voltage is VA [V], and the wire diameter is d [mmφ].

FIG. 3 shows a state in which the wire 7 protrudes from the welding tip 6 and the arc 8 flows from the tip toward the base material 10 to be welded. And their symbols are as defined below.

That is, la is the arc length, which is the length of the arc 8 generated from the tip of the wire 7 toward the base metal 10 to be welded. Also, le is the amount of wire protrusion, and is the protrusion length of the wire 7 protruding from the welding tip 6. Va is a true arc voltage, and is a potential difference of the arc 8 generated from the tip of the wire 7 toward the base metal 10 to be welded.

Ve is a voltage drop generated by the arc current i at the wire protrusion. If an arc having an arc length la is generated when the wire protrusion length is le, a true arc voltage at this time is Va, and an arc current i (welding current) flows i. The generated voltage drop is V
Assuming that e, VA, Va, and Ve have the relationship of equation (1).

That is, VA = Va + Ve. Then, based on the wire diameter d, the wire feeding speed Vw, and the wire protrusion length le, the arc current i, which is the welding current, is obtained.
Has the relationship of equation (2).

In the equation (2), k1, k2, and k3 are constants, and the wire diameter d is a given value of the given diameter in the case of a solid wire, and 0.8 in the case of a cored wire. Multiply by a value of ~ 0.95.

The voltage drop generated at the wire protruding portion due to the arc current i has the relationship of the equation (3). That is, Ve = k4.le.ik5.v / i. However, k4 and k5 are constants.

From the arc voltage VA and the voltage drop Ve at the wire protruding portion, the true arc voltage Va is given by the following equation (4).
That is, Va = VA−Ve. The arc length la is given by the equation (5), that is, la = (Va-k6.i
−k7) / k8. However, k6, k7, k8
Is a constant, and k6 varies depending on the type of shielding gas (CO ₂ or CO ₂ + Ar).

The wire protrusion length le is given by: le = l-
If the wire protrusion length le obtained from this relationship is given to equation (2) and the operation is repeated, the wire protrusion length le and the arc length la converge to constant values.

Since the arc length la and the wire protrusion length le are obtained as described above, the relationship between l, la and le, including the set value of the tip-base metal distance l, is shown in the right half of FIG. And, as shown in FIG. 3, a welding operation state diagram reflecting the dimensional relationship is drawn and displayed as an image.

Next, as in the first embodiment, the bead shape is changed as shown in FIG.
Simulate with the upper half of the ellipse. Assuming that the radius in the major axis direction of this ellipse is a and the radius in the minor axis direction is b, the area of the upper half of the ellipse is given by π · a · b / 2. Assuming that the welding speed ws is equal to this area and the wire feed amount (d / 2) ² π · Vw, the following equation (6) is obtained: (π · a · b / 2) = (d / 2) ² The relationship of π · Vw / ws holds.

Further, normally, when the arc voltage VA is low, the weld bead tends to be convex. Therefore, b is expressed by the equation (7), that is, b = k9−k10 · VA similarly to the first embodiment. Become Here, k9 and k10 are constants.

From equations (6) and (7), a radius a in the major axis direction and a radius b in the minor axis direction are obtained.
Is drawn on the welding line of the base metal to be welded, and is drawn as the obtained bead shape in the lower part of the right area of FIG.

These calculations, plotting, and display are repeated until the welding end signal is turned on. Thus, if the various condition settings are changed, the welding state after the change can be immediately graphically displayed together with the current setting condition values.

In addition to such processing, the arithmetic unit 1a determines whether or not the arc current and the arc voltage are within the proper ranges with reference to the welding condition set value and the simulation result. A comment is created and displayed on the display 2 depending on whether it is within the appropriate range or not.

The current / voltage appropriate conditions are set in the arithmetic unit 1a as a necessary comparison standard. The range of the current / voltage appropriate conditions is, for example, based on the experience of a skilled person, an experimental value, or the like. Based on Further, the arithmetic unit 1a is provided with a function of comparing with this comparison criterion, selecting an optimal comment according to the result, and displaying the selected comment on the display 2.

As described above, the comment is preset in the arithmetic unit 1a, and "the welding conditions are appropriate.", "The arc current is low.", "The arc current is appropriate but the arc voltage is too high." I have prepared a comment that says, "

Then, the arithmetic unit 1a determines that
If it is determined that the arc current is within the appropriate range, a comment “Welding conditions are appropriate” is selected and displayed on the display 2. The message "Low" is selected and displayed on the display 2. Also, if the arc current is within the proper range according to the comparison standard but the arc voltage is too high, the message "The arc current is appropriate but the arc The voltage is too high. "And the result is displayed on the display 2 so that the user can see the result of simulating the state of arc welding under the set welding conditions.
Whether the set welding conditions are appropriate or not, and if improper, what is inappropriate is specifically known.

As comparison standards for examining the appropriate range of the set welding conditions, FIG. 9 shows an example of the current / voltage appropriate condition range Ra of the arc welding using a solid wire, and FIG. Is shown. In each case, the vertical axis is the arc voltage (unit is [V]),
The horizontal axis is the welding current (unit is [A]).

FIGS. 11 to 13 show examples of display screens of the display 2 in a state where comments are displayed. This allows
A graphic indicating the result of the arc phenomena simulation performed based on the set welding conditions and the data of the set welding conditions are displayed on the display screen of the display unit 2 and further, whether or not the set welding conditions are appropriate is displayed in a comment column CMT. Then, the user of the apparatus is notified.

FIG. 11 shows a case where the arc current and the arc voltage are both within the proper ranges.
Indicates that the comment "Welding conditions are appropriate" is displayed on the display 2 because the setting conditions are appropriate in light of the appropriate conditions. FIG. 12 shows a case where the arc current is low, in which a comment indicating that "the arc current is low" is displayed in the comment column CMT.
FIG. 13 shows a case where the arc current is within the appropriate range but the arc voltage is too high, and a comment column "MT is appropriate but the arc voltage is too high" is displayed in the comment column CMT. ing.

FIGS. 14 and 15 show flow charts of the calculation in the device of the second embodiment, which will be described below. When this apparatus is operated, the arithmetic unit 1a first temporarily sets the wire protrusion length le (St1). For this, a specific numerical value is prepared in advance as an initial setting value, for example, set to 15 mm as an initial value.

The computing unit 1a waits until the welding start / welding end switch 3j of the welding condition setting unit 3 is operated to the welding start side (waits for the welding start to be turned on) (St).
2).

The welding start switch 3 is operated by the operator.
When j is turned on, a signal indicating that the welding start switch 3j is turned on is given from the welding condition setting device 3 to the computing device 1a via the digital signal input device 5, so that the computing device 1a performs the simulated calculation. Operate and set the shield gas type (CO ₂ or C ₂₎ set in the welding condition setting device 3.
O ₂ + Ar), wire type (solid wire or cored wire), and wire diameter d (1.2 mm, 1.4 mm,
1.6 mm) is taken in through the digital signal input device 5 (St3).

The arithmetic unit 1 converts the analog set values of the welding speed ws, the tip-base metal distance l, the wire feed speed Vw, and the arc voltage value Va set in the welding condition setting unit 3 into A / A.
The data is fetched through the D converter 4 (St4).

Next, the arithmetic unit 1 converts the analog quantities taken in step St4 into respective physical quantities (St
5). An example is shown in FIG. In each of the figures, the horizontal axis represents the input voltage, and the vertical axis represents (a) the welding speed ws,
(B) shows the distance l between the tip and the base material, (c) shows the wire feed speed Vw, and (d) shows the arc voltage VA. The input voltage is converted into a physical quantity corresponding to the vertical axis.

Next, the welding current i is calculated from the set wire diameter d, wire feeding speed Vw and wire protrusion length le based on the equation (2) (St6). here,
The value of the wire diameter d to be substituted into the equation (2) is a value obtained by multiplying d by a value of 0.8 to 0.95 when the wire to be used is a solid wire or in the case of a cored wire.

Next, the voltage drop caused by the arc current at the wire protruding portion is obtained by calculation based on the equation (3) (St7). Further, the true arc voltage Va is obtained from VA and Ve by the equation (4) (St8), and the arc length la is obtained by the equation (5) (St9).

Next, the arithmetic unit 1a calculates the wire protrusion length le.
Is obtained from the relationship of le = l-la (St10), the obtained wire protrusion length le is returned to Step St5, and the above-described calculation up to Step St10 is repeated. As a result, the wire protrusion length le and the arc length la converge to constant values.

Since the arc length la and the wire protrusion length le have been obtained as described above, the arithmetic unit a1 next calculates the chip length.
A state diagram including the relationship between l, la, and le including the set value of the base material distance l is drawn, and the right region of FIG.
(St21) according to the size.

Next, the arithmetic unit 1a calculates a and b by performing calculations based on the equations (6) and (7), and simulates the bead shape with the upper half of the ellipse as shown in FIG. Then, the right and lower figures of FIG. 2 are drawn as a bead shape. Also, a list of welding conditions is displayed in characters in the left half area of the screen in FIG. 2 (St.
22).

Then, the arithmetic unit 1a checks whether the welding conditions set by the welding condition setting unit 3 are appropriate (St).
23) As a result, if it is appropriate, a comment “Welding conditions are appropriate” is displayed on the display 2 (St24), and if inappropriate, what is appropriate and what condition is inappropriate is examined. A comment is displayed on the display 2 (St25).

The computing unit 1a performs these calculations, plots and displays, checks whether setting conditions are appropriate, and displays comments based on the results.
The operation is repeated until the welding end signal is received by operating the welding end switch 3j (St26).

By changing the welding condition by performing the setting operation of the welding condition setting device 3, the state under the changed condition is immediately simulated, and an image showing the state is displayed, and the setting is performed. Since the comment is displayed on the appropriateness of the welding conditions, the welding conditions to be applied (welding current (arc current), arc voltage, welding speed)
It is possible to intuitively know before and after the construction is appropriate, and in the case of improperness, it is possible to specifically know what is inappropriate and what is appropriate.

As described above, by using this simulator, whether or not the welding conditions to be performed (welding current (arc current), arc voltage, welding speed) are appropriate is displayed in the form of an image indicating the state of the work. By doing so, it is possible to intuitively judge by seeing this, and it is possible to prevent troubles due to welding work.

Particularly for those who are not skilled in welding, understanding how changes in parameters such as the wire feed speed, arc voltage, and tip-base metal distance affect welding development (including arc phenomena). It is difficult to do this, but by using this simulator, it can be understood visually.

In the present apparatus, the signals giving the welding speed, the tip-base metal distance, the wire feeding speed and the arc voltage given to the arithmetic unit 1a are analog quantities, and their magnitudes are changed by changing the variable resistors. Can be changed, and as shown in FIG. 6, the magnitude of the signal such as the welding speed and the analog amount are in a monotonically increasing relationship.

The type of the shielding gas, the type of the wire and the diameter of the wire are set to a high level by the digital signal of the selected parameter. Conversely, the arithmetic unit 1a sets the type of the shielding gas, the type of the wire and the diameter of the wire ( 1.2 mm
φ, 1.4 mmφ, 1.6 mmφ, etc.), the selected parameter can be recognized by checking which parameter signal information is at a high level.

The analog signals of the welding speed, the tip-base metal distance, the wire feed speed and the arc voltage given to the arithmetic unit 1a are taken into the arithmetic unit 1a via the A / D converter and set to the set welding. Speed, tip-base distance,
When the type of the shielding gas, the type of the wire and the diameter of the wire are selected, the wire feed speed, the distance between the tip-base material and the arc voltage are determined. The arc length la and the wire protrusion length le are obtained from this relationship by calculation, and the wire and wire tip corresponding to the wire protrusion length le from the tip together with the vicinity of the tip of the welding torch are used. An arc having a length corresponding to the arc length la is drawn from the base material to the base material and displayed on the display unit 2 of the arithmetic unit 1a. Further, the welding speed ws is taken in, the bead shape is calculated from the welding speed ws, the wire feeding speed and the arc voltage, and displayed on the display unit 2 of the calculator 1a.

Then, the analog and digital signals are fetched and the arc length la and the wire protrusion length le corresponding to the type of the shielding gas, the type of the wire and the wire diameter d are obtained by calculation, and the display unit 2 of the calculator 1a is obtained.
Then, the above-mentioned processing of drawing a wire corresponding to the wire protrusion length le from the tip and an arc having a length corresponding to the arc length la from the wire tip to the base metal is repeated together with the figure near the tip of the welding torch. So that figures are displayed according to the latest settings.

In addition, in order to quantitatively understand the welding state, information on the selected shield gas type, wire diameter, tip-base metal distance, wire feed speed, arc current, etc. Information such as values, arc voltage values, and arc lengths are also displayed in characters. Furthermore, the propriety of the set welding conditions is checked against the standard of the proper welding range, and from the result, a comment on the propriety of the set welding conditions and, if improper, a comment as to what is inappropriate. It can be displayed and notified.

Therefore, according to the second embodiment, the welding simulation can be easily performed by simplifying the configuration, and the simulation result can be displayed in a diagram, so that the welding conditions (welding current (arc current), arc voltage , Welding speed) can be known in the form of an image showing the state of work, so that it is possible to intuitively judge the suitability of the set welding conditions. It is possible to know specifically what is inappropriate in the case of inappropriate conditions, which is extremely useful for skill training of unskilled persons.

Although various embodiments have been described above, the present invention simulates a welding situation under the set conditions in accordance with the latest set contents, and performs arc welding under the conditions including an arc state. In addition to displaying the state diagram, the selected shield gas type, wire diameter information, tip-base distance, wire feed speed, arc current value, and arc voltage value can be quantitatively understood. , Arc length, etc. are also displayed in characters, and whether or not the welding conditions (welding current (arc current), arc voltage, welding speed) to be applied are appropriate is determined from the image indicating the application state. The determination can be made intuitively, and the reason for the inappropriateness can be understood, so that a further effect can be expected for training of the unskilled person.

The present invention is not limited to the above-described embodiment, and may be appropriately changed without departing from the scope of the invention.
For example, the numerical values in the above-described embodiment are merely examples, and the present invention is not limited thereto. In addition, the shield gas type, wire type, wire diameter, and the like are not limited thereto. Furthermore, in this embodiment, the apparatus was shown as a simulator.However, this apparatus was incorporated in an arc welding machine, and a simulation was performed under set conditions before starting welding work, and then the arc welding was performed under these set conditions. It can also be done.

Further, the comment created by the arithmetic unit may be a content indicating whether or not each of the setting conditions of the arc welding set by the welding condition setting unit is appropriate or not. It is also possible to easily obtain an amount deviating from the above and display the amount.

[0125]

As described in detail above, according to the present invention,
Welding conditions to be applied (welding current (arc current),
Whether or not the arc voltage and the welding speed are appropriate is displayed in the form of an image indicating the state of work, so that it is possible to intuitively judge by seeing this, so that troubles due to welding work can be prevented. In addition, since the suitability of the set welding conditions can be specifically known by comments, effects such as being optimal for training of unskilled persons can be obtained.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining an embodiment of the present invention,
FIG. 1 is a block diagram of the overall configuration of a device according to a first embodiment of the present invention.

FIG. 2 is a view for explaining an embodiment of the present invention, showing a display example of the apparatus of the present invention.

FIG. 3 is a diagram for explaining an embodiment of the present invention,
The figure which shows the dimension relationship at the time of welding.

FIG. 4 is a flowchart for explaining an operation example of the device according to the first embodiment of the present invention.

FIG. 5 is a flowchart for explaining an operation example of the apparatus according to the first embodiment of the present invention.

FIG. 6 is a diagram for explaining an embodiment of the present invention,
FIG. 4 is an input / output characteristic diagram of various parameters given by an analog amount in the welding condition setting device.

FIG. 7 is a diagram for explaining an embodiment of the present invention,
The figure for explaining the simulation of a bead shape.

FIG. 8 is a diagram for explaining an embodiment of the present invention,
FIG. 9 is a block diagram of the overall configuration of the device according to a second embodiment of the present invention.

FIG. 9 is a diagram for explaining an embodiment of the present invention,
The figure which shows the example of the current / voltage suitable condition range Ra of the arc welding which shows an example as a comparison standard for investigating the proper range of the set welding conditions.

FIG. 10 is a view for explaining an embodiment of the present invention, and shows an example of a current / voltage proper condition range Ra of arc welding showing an example as a comparison standard for examining a proper range of set welding conditions. FIG.

FIG. 11 is a diagram for explaining the embodiment of the present invention, and is a diagram showing a display example in which a comment indicating whether the set welding conditions are appropriate is additionally displayed.

FIG. 12 is a diagram for explaining the embodiment of the present invention, and is a diagram showing a display example in which a comment indicating whether set welding conditions are appropriate is additionally displayed.

FIG. 13 is a diagram for explaining the embodiment of the present invention, and is a diagram showing a display example in which a comment indicating whether the set welding conditions are appropriate is additionally displayed.

FIG. 14 is a diagram for explaining the embodiment of the present invention, and is a flowchart for explaining an operation example of the device in the second embodiment of the present invention.

FIG. 15 is a diagram for explaining the embodiment of the present invention, and is a flowchart for explaining an operation example of the device in the second embodiment of the present invention.

[Explanation of symbols]

 1, 1a arithmetic unit 2 display unit of arithmetic units 1 and 1a 3 welding condition setting unit 3a to 3d dial knob 3e, 3j switch 4 A / D converter 5 digital signal input device 6 welding tip 7 ... wire 8 ... arc 9 ... shield nozzle 10 ... base material to be welded 11 ... weld bead

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Fumio Yamashita 1-1, Akunoura-cho, Nagasaki-shi, Nagasaki Mitsubishi Heavy Industries, Ltd. Nagasaki Shipyard (72) Inventor Junji Wakiyama 1-1, Akunoura-cho, Nagasaki-shi, Nagasaki Mitsubishi (56) References JP-A-4-111975 (JP, A) JP-A-4-55060 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B23K 9/095 G06F 17/00

Claims (6)

(57) [Claims] 1. The type and diameter of a wire used for arc welding,
Welding condition setting means for providing welding conditions such as a welding speed, a distance between a tip supporting the wire and a base material to be welded, a feeding speed of the wire sent out through the tip, and an applied arc voltage value; Using the construction conditions given by the welding condition setting means,
Each element of the above-mentioned construction conditions theoretically determined and the welding current, the amount of wire protruding from the tip, and the welding current by the equation showing the relationship between the arc length of the arc generated on the wire tip side,
Approximate to half of the ellipse by the first calculation function for calculating the wire protrusion amount and arc length, and the relational expression utilizing that the relationship between the welding speed and the welding speed with respect to the wire feed amount is equal to half the area of the ellipse. A second calculation function for determining the bead shape that has been made, and a state diagram showing the state of the wire protruding with respect to the welding position of the base material to be welded and the state of the arc generated on the wire tip side based on these calculation results, and the construction conditions Operating means having a function of creating a diagram showing a state of a bead shape on a base material to be welded obtained by the arc welding process, and display means for displaying a diagram obtained by the operating means. Welding work simulator device. 2. The type and diameter of a wire used for arc welding;
Welding condition setting means for providing welding conditions such as a welding speed, a distance between a tip supporting a wire and a base material to be welded, a feeding speed of the wire fed out through the tip, and an applied arc voltage value; Using the construction conditions given by the welding condition setting means,
Each element of the above-mentioned construction conditions theoretically determined and the welding current, the amount of wire protrusion from the tip, and the welding current by the equation showing the relationship between the arc length of the arc generated on the wire tip side,
Approximate to half of the ellipse by the first calculation function to calculate the wire protrusion amount and the arc length, and the relational expression utilizing that the relationship between the welding speed and the welding speed with respect to the wire feed amount is equal to half the area of the ellipse. A second calculation function for obtaining the bead shape obtained, and a state diagram showing a wire protruding state with respect to the welding position of the base material to be welded and an arc state generated on the wire tip side based on these calculation results, and the execution conditions. A diagram showing the state of the bead shape on the base material to be welded obtained by the arc welding process at the welding condition and a function of creating at least the welding current obtained above and the character display information of the generated arc voltage and arc length, and And a display means for displaying the figure and the character display information obtained by the calculation means. Simulator device. 3. The type and diameter of a wire used for arc welding.
Welding condition setting means for providing welding conditions such as a welding speed, a distance between a tip supporting the wire and a base material to be welded, a feeding speed of the wire sent out through the tip, and an applied arc voltage value; Using the construction conditions given by the welding condition setting means,
Each element of the above-mentioned construction conditions theoretically determined and the welding current, the amount of wire protruding from the tip, and the welding current by the equation showing the relationship between the arc length of the arc generated on the wire tip side,
Approximate to half of the ellipse by the first calculation function for calculating the wire protrusion amount and arc length, and the relational expression utilizing that the relationship between the welding speed and the welding speed with respect to the wire feed amount is equal to half the area of the ellipse. A second calculation function for determining the bead shape that has been made, and a state diagram showing the state of the wire protruding with respect to the welding position of the base material to be welded and the state of the arc generated on the wire tip side based on these calculation results, and the construction conditions The function of creating a diagram showing the state of the bead shape on the base material to be obtained obtained by the arc welding process in, using a comparison standard for examining the appropriate range of the welding conditions set by the welding condition setting means, A computing means having a welding condition propriety investigation function for examining whether or not the set welding conditions are appropriate and creating a comment corresponding to the result, A welding operation simulator device comprising: a display unit for displaying a diagram and a comment obtained by the calculation unit. 4. The type and diameter of a wire used for arc welding;
Welding condition setting means for providing welding conditions such as a welding speed, a distance between a tip supporting the wire and a base material to be welded, a feeding speed of the wire sent out through the tip, and an applied arc voltage value; Using the construction conditions given by the welding condition setting means,
Each element of the above-mentioned construction conditions theoretically determined and the welding current, the amount of wire protruding from the tip, and the welding current by the equation showing the relationship between the arc length of the arc generated on the wire tip side,
Approximate to half of the ellipse by the first calculation function for calculating the wire protrusion amount and arc length, and the relational expression utilizing that the relationship between the welding speed and the welding speed with respect to the wire feed amount is equal to half the area of the ellipse. A second calculation function for determining the bead shape that has been made, and a state diagram showing the state of the wire protruding with respect to the welding position of the base material to be welded and the state of the arc generated on the wire tip side based on these calculation results, and the construction conditions A function of creating a diagram showing the state of the bead shape on the base material to be welded obtained by the arc welding process and welding conditions and at least the obtained welding current and the voltage of the generated arc and the character display information of the arc length, Using the comparison criterion for examining the proper range of the welding conditions set by the welding condition setting means, the set welding conditions are used. Whether with examine its calculating means and a welding condition suitability study ability to create a comment corresponding to the result, the welding operation comprising a display means for displaying figures and comments obtained by the calculating means Simulator device. 5. The arc welding conditions provided by the welding condition setting means include the type of shielding gas to be used, and a correction corresponding to the type of shielding gas is added to the relational expression of the arc length calculation by the calculating means. The welding operation simulator device according to any one of claims 1 to 4, wherein 6. The comment according to claim 3, wherein the comment created by the calculation means is content indicating whether or not each of the welding conditions set by the welding condition setting means is appropriate. Welding work simulator equipment.