JP5532209B2 - Welding machine equipped with indicator and welding method using the same - Google Patents

Description

  The present invention relates to a welding machine including a display and a welding method using the same, and more particularly to a welding machine including a display that displays an overlap amount of welding beads and a welding method thereof.

When performing welding that requires a relatively wide range of beads such as multi-layer welding or build-up welding, it is common to perform a weaving operation on the tip of the welding torch. The weaving operation refers to reciprocating the tip of the welding torch about the weld line in a direction perpendicular to the weld line direction.
In welding in which the waving operation is performed in this way, for example, even if the weaving speed, which is the speed at which the tip of the torch is reciprocated, and the welding speed along the weld line direction are constant, the groove width of the welding object, that is, the weaving width, is constant. When it changes, the overlap amount (oscillate pitch) of the weld beads changes.

  In welding with such a weaving operation, when a pair of pipes are joined, an image of a groove portion photographed by a CCD camera is image-processed to recognize the groove center position and groove width of the workpiece, and to perform the opening. There is an automatic welding machine that performs welding by calculating a welding position and an oscillating width by a welding torch based on a tip center position and a groove width (see Patent Document 1).

Japanese Patent Laid-Open No. 11-58008

However, even if the welding position and the oscillating width by the welding torch can be determined from the groove center position and the groove width as in the automatic welding machine disclosed in Patent Document 1, the bead overlap amount generated as a result of welding Cannot be accurately grasped.
Further, in the case of semi-automatic welding or manual welding, the amount of bead overlap largely depends on the skill of the operator. The amount of bead overlap is affected by the weaving width, the weaving speed, and the welding speed, and it is difficult for an inexperienced worker or the like to make the bead overlap constant. If the amount of bead overlap is not constant, there is a problem in that poor welding, undercut, overlap, and the like occur, so that the quality of welding deteriorates and the aesthetic appearance is impaired.

  The present invention has been made to solve such problems, and the object of the present invention is to make it possible to easily make the amount of bead overlap constant regardless of the operator's experience and to improve the welding quality. Another object of the present invention is to provide a welding machine equipped with a display device and a welding method using the same.

In order to achieve the above object, in the welding machine having the indicator of claim 1, welding is performed along the welding line while reciprocating the tip of the welding torch in a direction substantially perpendicular to the welding line and overlapping the beads. And a welding speed provided at a control unit for setting welding conditions in the welding machine, a welding speed that is a speed that advances in the welding line direction of the welding machine, and a weaving that is a width in which the welding torch reciprocates in a direction substantially perpendicular to the welding line The bead overlap amount is sequentially calculated from the width and the weaving speed at which the welding torch advances in a direction substantially perpendicular to the weld line, and the result and the appropriate range of the bead overlap amount according to the welding target are obtained. And a bead overlap amount display for displaying the relationship in a monitorable manner.
Moreover, in the welding machine provided with the indicator of claim 2, the bead overlap amount indicator in claim 1 is an analog meter in which a needle swings in accordance with the calculated bead overlap amount. It is a feature.

In a welding method using a welding machine provided with the indicator of claim 3 , a welding machine that performs welding along the weld line while reciprocating the tip of the welding torch in a substantially vertical direction of the weld line and overlapping the beads, Welding speed, which is the speed at which the welding machine advances in the direction of the welding line, weaving width, at which the welding torch reciprocates in the direction substantially perpendicular to the welding line, and weaving, at which the welding torch advances in the direction substantially perpendicular to the welding line A bead overlap amount display unit that sequentially calculates the bead overlap amount from the speed and displays the result and the relationship between the result and the appropriate range of the bead overlap amount according to the object to be welded. display amount of overlap indicator, wherein when it exceeds the proper range, the operating the welder to increase the weaving speed, when it falls below the appropriate range, the weaving speed It is characterized by operating the welding machine so as to reduce.

In a welding method using a welding machine equipped with a display device according to claim 4 , a welding machine for performing welding along the weld line while reciprocating the tip of the welding torch in a substantially vertical direction of the weld line and overlapping the beads, Welding speed, which is the speed at which the welding machine advances in the direction of the welding line, weaving width, at which the welding torch reciprocates in the direction substantially perpendicular to the welding line, and weaving, at which the welding torch advances in the direction substantially perpendicular to the welding line A bead overlap amount display unit that sequentially calculates the bead overlap amount from the speed and displays the result and the relationship between the result and the appropriate range of the bead overlap amount according to the object to be welded. display amount of overlap indicator, if it exceeds the proper range, operating the welding machine so as to reduce the welding speed, when it falls below the appropriate range increases the welding speed It is characterized by operating the welder.

In a welding method using a welding machine equipped with a display device according to claim 5 , a welding machine for performing welding along the weld line while reciprocating the tip of the welding torch in a substantially vertical direction of the weld line and overlapping the beads, Welding speed, which is the speed at which the welding machine advances in the direction of the welding line, weaving width, at which the welding torch reciprocates in the direction substantially perpendicular to the welding line, and weaving, at which the welding torch advances in the direction substantially perpendicular to the welding line A bead overlap amount display unit that sequentially calculates the bead overlap amount from the speed and displays the result and the relationship between the result and the appropriate range of the bead overlap amount according to the object to be welded. display amount of overlap indicator, wherein when it exceeds the proper range, the operating the welder to increase the weaving speed, when it falls below the appropriate range, the weaving speed Operating the welder to reduce further, even after the operation of the weaving speed, the display of the bead overlap amount indicator, wherein when it exceeds the proper range, the so decreasing the welding speed welding operating the machine, if it falls below the appropriate range is characterized in that operating the welder to increase the welding speed.

According to the welding machine equipped with the indicator according to claims 1 and 2 of the present invention using the above means, the overlap amount of the beads is calculated from the welding machine, the welding speed, the weaving width, and the weaving speed, and the result is displayed. A bead overlap amount indicator.
In this way, by providing the bead overlap amount display for calculating and displaying the bead overlap amount, it is possible to easily detect the fluctuation of the bead overlap amount, and welding according to the fluctuation of the bead overlap amount. Work can be done.

In addition, the bead overlap amount indicator is provided in the control unit for setting the welding conditions in the welding machine, so that the bead overlap amount change is detected immediately and the bead overlap amount change is immediately detected by the control unit. It is possible to perform operations according to.
From the above, regardless of the operator's experience, the amount of bead overlap can be easily made constant, and the welding quality can be improved.

According to the welding method using the welding machine provided with the indicator of claim 3 , the welding machine provided with the bead overlap amount indicator for calculating and displaying the bead overlap amount based on the welding speed, the weaving width, and the weaving speed. When the display on the bead overlap amount indicator exceeds the predetermined appropriate range, the operation is performed to increase the weaving speed, and when the display is below the predetermined appropriate range, the operation is performed to decrease the weaving speed. .

As described above, when the bead overlap amount is out of the proper range, the welding can be performed with an appropriate bead overlap amount by operating the weaving speed.
Thereby, the amount of bead overlap can be easily made constant regardless of the experience of the operator, and the welding quality can be improved.
According to the welding method using the welding machine provided with the indicator of claim 4 , the welding machine provided with the bead overlap amount indicator that calculates and displays the bead overlap amount based on the welding speed, the weaving width, and the weaving speed. When the display on the bead overlap amount indicator exceeds a predetermined appropriate range, the welding speed is decreased, and when the bead overlap amount indicator is lower than the predetermined appropriate range, the welding speed is increased. .

In this way, when the bead overlap amount is out of the appropriate range, the welding can be performed with an appropriate bead overlap amount by operating the welding speed.
Thereby, the amount of bead overlap can be easily made constant regardless of the experience of the operator, and the welding quality can be improved.
According to the welding method using the welding machine provided with the indicator of claim 5 , the welding machine provided with the bead overlap amount indicator that calculates and displays the bead overlap amount based on the welding speed, the weaving width, and the weaving speed. In this case, when the display of the bead overlap amount indicator is out of the predetermined appropriate range, the weaving speed is first operated, and after the operation of the weaving speed, the welding speed is set next. Manipulate.

As described above, when the bead overlap amount deviates from the appropriate range, the bead overlap amount can be reliably within the appropriate range by increasing the weaving speed and decreasing the welding speed.
Thereby, the amount of bead overlap can be easily made constant regardless of the experience of the operator, and the welding quality can be improved.

It is a schematic block diagram of the welding machine provided with the indicator which concerns on this invention. It is a schematic top view of the welding machine provided with the indicator which concerns on this invention. It is a figure which shows the meter display of an oscillating pitch.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Referring to FIG. 1, there is shown a schematic configuration diagram of a welding machine including a display device according to the present invention.
A welding machine 1 shown in FIG. 1 is a so-called semi-automatic arc welding machine, which performs downward butt welding on a pair of flat base materials 2a and 2b.
Specifically, the carriage 10 is placed across the base materials 2a and 2b. The cart 10 can travel along a weld line passing through the center of the groove between the base materials 2a and 2b by driving the motor. A welding torch 14 is provided on the carriage 10 via a torch support mechanism 12. The torch support mechanism 12 supports the welding torch 14 so as to be swingable in the vertical direction and the width direction perpendicular to the welding line by driving the motor.

A welding wire 14a is fed into the welding torch 14 from a wire feeder (not shown) via a hose 16 and a shield gas is supplied from a cylinder (not shown).
Further, the welding torch 14 and the carriage 10 are electrically connected to a welding control device 18 (control unit).

The welding control device 18 performs power source management such as electric power supplied to the welding torch 14 and the carriage 10 and also has a function of controlling the feeding amount of the welding wire, the shielding gas supply amount, the operation of the welding torch 14 and the carriage 10, and the like. Have.
The front panel 18a of the welding control device 18 is provided with various indicators such as a current meter 20, a voltage meter 22, a welding speed meter 24, an oscillating pitch meter 26, and the like. Further, the front panel 18a includes a current operation unit 28 and a voltage operation unit 30 for setting a current value and a voltage value of electric power supplied to the welding torch 14, a welding speed operation unit 32 for setting a traveling speed of the carriage 10, and a torch. A weaving width operation unit 34 for setting a reciprocating width (hereinafter referred to as a weaving width) of the swinging of the welding torch 14 in the width direction by the support mechanism 12 and a swinging speed (hereinafter referred to as a weaving speed) of the welding torch 14 in the width direction. Various operation units such as a weaving speed operation unit 36 to be set are provided.

Each type of meter is an analog meter in which a needle swings according to a detected value, and has a scale corresponding to each detected value.
A current meter 20 that displays the current value actually supplied to the welding torch 14, a voltage meter 22 that also displays the voltage value, and a welding speed meter 24 that displays the actual traveling speed of the carriage 10 are conventional meters. The detailed description is omitted.

Hereinafter, the oscillating pitch meter 26 will be described in detail.
FIG. 2 shows a schematic top view of a welding machine equipped with a display according to the present invention, and FIG. 3 shows a diagram showing a meter display of the oscillating pitch. In FIG. 2, the groove width is shown large for easy understanding.
As shown in FIG. 2, the welding speed in the welding line direction, that is, the traveling speed of the carriage 10 is the welding speed v, the reciprocating width at which the tip of the welding torch 14 swings in the width direction is the weaving width Ww, and the welding torch 14. The weaving speed Wv is the speed at which the tip swings in the width direction, and the oscillating pitch P is the amount of overlap of beads formed by one reciprocation of the tip of the welding torch 14.

The welding control device 18 detects the welding speed v obtained by detecting the traveling speed of the carriage 10, the weaving width Ww obtained by detecting the swinging width and the swinging speed of the welding torch 14 in the torch support mechanism 12, and the weaving. The speed Wv information is acquired.
The welding control device 18 calculates the obtained welding speed v, weaving width Ww, and weaving speed Wv based on the following equation (1) to calculate the oscillating pitch P.

P = (Ww / Wv) × v (Formula 1)
As shown in FIG. 3, the oscillating pitch meter 26 is configured such that the needle swings to a position corresponding to the value of the oscillating pitch P calculated by the welding control device 18.
Hereinafter, a welding method using the welding machine including the display device according to the present invention configured as described above will be described.

  First, at the start of welding, the operator operates various operating units to set initial conditions according to the welding target, such as setting the weaving width Ww by operating the weaving width operating unit 34 according to the groove width, Start welding. After starting welding, the oscillating pitch meter 26 monitors whether or not the value of the oscillating pitch P is within an appropriate range according to the object to be welded, as shown in FIG. The appropriate range is set in advance according to the object to be welded.

When the oscillating pitch P is within the proper range, the welding conditions are maintained, and when the oscillating pitch P is outside the proper range, the oscillating pitch P is adjusted.
As an operation in the adjustment operation, first, the weaving speed operation unit 36 is operated in order to adjust the weaving speed Wv in which the adjustment width is relatively narrow and the oscillating pitch P can be finely adjusted.
Specifically, when the value of the oscillating pitch meter 26 exceeds the appropriate range, the set value of the weaving speed Wv is increased by operating the weaving speed operation unit 36. In this way, by increasing the weaving speed Wv and increasing the rocking speed of the welding torch 14, the bead is thinned and the oscillating pitch P is decreased.

On the other hand, when the value of the oscillating pitch meter 26 falls below the appropriate range, the set value of the weaving speed Wv is decreased by operating the weaving speed operation unit 36. In this way, the bead is thickened by decreasing the weaving speed Wv and slowing the rocking speed of the welding torch 14, and the oscillating pitch P is increased.
Further, when the oscillating pitch P does not fall within the proper range even after the adjustment with the weaving speed Wv, the welding speed operating unit 32 adjusts the welding speed v that is relatively wide and can adjust the oscillating pitch P significantly. To operate.

  Specifically, when the value of the oscillating pitch meter 26 exceeds the appropriate range, the welding speed operation unit 32 is operated to decrease the set value of the welding speed v. In this way, the welding speed v is decreased and the traveling speed of the carriage 10 is decreased, so that the progress in the weld line direction is delayed, and the oscillating pitch P is decreased. In particular, the oscillating pitch P can be reliably reduced by increasing the weaving speed Wv and then decreasing the welding speed v.

  On the other hand, when the value of the oscillating pitch meter 26 falls below the appropriate range, the welding speed operating unit 32 is operated to increase the set value of the welding speed v. In this way, the welding speed v is increased, and the traveling speed of the carriage 10 is increased, so that the progress in the weld line direction is accelerated and the oscillating pitch P is increased. In particular, the oscillating pitch P can be reliably increased by increasing the welding speed v after reducing the weaving speed Wv.

As described above, by providing the welding control device 18 of the welding machine 1 with the oscillating pitch meter 26 that sequentially calculates and displays the overlap amount of the beads, the fluctuation of the oscillating pitch P can be easily detected. An operation corresponding to the variation of the pitch P can be immediately performed by the welding control device 18.
When the oscillating pitch P is out of the proper range in the oscillating pitch meter 26, the oscillating pitch P can be easily set within the proper range by operating the weaving speed Wv and the welding speed v depending on whether the oscillating pitch P is above or below the proper range. Can be modified within.

Further, in the adjustment operation of the oscillating pitch P, first, the weaving speed Wv having a narrow adjustment width is adjusted, and then the welding speed v having a wide adjustment width is adjusted, so that the oscillating operation is ensured while ensuring the stability of the welding work. The pitch can be within an appropriate range.
Thus, by performing the operation according to the meter display of the oscillating pitch meter 26 that displays the bead overlap amount, the bead overlap amount can be easily made constant regardless of the experience of the operator, and the welding quality is improved. be able to.

Although the description about embodiment of the welding machine provided with the indicator which concerns on this invention, and embodiment of the welding method using this is finished above, embodiment is not restricted to the said embodiment.
For example, in the above-described embodiment, downward welding is taken as an example, but the welding posture is not limited to downward, and may be standing, upward, lateral, or the like.
In the above embodiment, arc welding is taken as an example, but the welding technique is not limited to this, and the present invention can be applied as long as it is a welding technique in which beads are stacked by a weaving operation.

Further, the direction of the weaving width is not limited to the groove width direction, and for example, a configuration in which weaving is performed with a narrow groove in the depth direction is also applicable.
In the above embodiment, the oscillating pitch meter is provided in the semi-automatic welding machine that operates according to the set value. However, the invention is not limited to the semi-automatic welding machine, and can be applied to, for example, a manual welding machine. In the case of manual welding, the operator's force is controlled according to the display of the oscillating pitch meter, not the operation of the operation unit of the welding control device.

  Further, in the above embodiment, the welding torch 14 is configured to reciprocate in the vertical direction of the welding line by being swung by the torch support mechanism 12, but the welding torch is not moved but is translated in the vertical direction of the welding line. May be configured to reciprocate.

DESCRIPTION OF SYMBOLS 1 Welding machine 2a, 2b Base material 10 Bogie 12 Torch support mechanism 14 Welding torch 18 Welding control device (control part)
26 Oscillating pitch meter 32 Welding speed operation section 34 Weaving width operation section 36 Weaving speed operation section

Claims (5)

A welding machine that performs welding along the weld line while reciprocating the tip of the welding torch substantially in the vertical direction of the weld line and overlapping the beads;
Provided in a control unit for setting welding conditions in the welding machine;
A welding speed that is a speed at which the welding machine advances in the welding line direction, a weaving width at which the welding torch reciprocates in a substantially vertical direction of the welding line, and a speed at which the welding torch advances in a substantially vertical direction of the welding line. A bead overlap amount display that sequentially calculates the bead overlap amount from the weaving speed, and displays the result and the relationship between the result and the appropriate range of the bead overlap amount according to the welding target ,
A welding machine equipped with a display device.   The welding machine with an indicator according to claim 1, wherein the bead overlap amount indicator is an analog meter in which a needle swings in accordance with the calculated bead overlap amount. A welding machine that performs welding along the weld line while reciprocating the tip of the welding torch substantially in the vertical direction of the weld line and overlapping the beads;
A welding speed that is a speed at which the welding machine advances in the welding line direction, a weaving width at which the welding torch reciprocates in a substantially vertical direction of the welding line, and a speed at which the welding torch advances in a substantially vertical direction of the welding line. A bead overlap amount display that sequentially calculates the bead overlap amount from the weaving speed and displays the result and the relationship between the result and the appropriate range of the bead overlap amount according to the welding target ,
Display of the bead overlap amount indicator, if it exceeds the appropriate range, the operating the welder to increase the weaving speed, when it falls below the proper range, decreases the weaving speed A welding method using a welding machine equipped with an indicator, wherein the welding machine is operated. A welding machine that performs welding along the weld line while reciprocating the tip of the welding torch substantially in the vertical direction of the weld line and overlapping the beads;
A welding speed that is a speed at which the welding machine advances in the welding line direction, a weaving width at which the welding torch reciprocates in a substantially vertical direction of the welding line, and a speed at which the welding torch advances in a substantially vertical direction of the welding line. A bead overlap amount display that sequentially calculates the bead overlap amount from the weaving speed and displays the result and the relationship between the result and the appropriate range of the bead overlap amount according to the welding target ,
Display of the bead overlap amount indicator, if it exceeds the appropriate range, the operating the welder to reduce welding speed, when it falls below the appropriate range increases the welding speed A welding method using a welding machine equipped with an indicator, wherein the welding machine is operated. A welding machine that performs welding along the weld line while reciprocating the tip of the welding torch substantially in the vertical direction of the weld line and overlapping the beads;
A welding speed that is a speed at which the welding machine advances in the welding line direction, a weaving width at which the welding torch reciprocates in a substantially vertical direction of the welding line, and a speed at which the welding torch advances in a substantially vertical direction of the welding line. A bead overlap amount display that sequentially calculates the bead overlap amount from the weaving speed and displays the result and the relationship between the result and the appropriate range of the bead overlap amount according to the welding target ,
Display of the bead overlap amount indicator, if it exceeds the appropriate range, the operating the welder to increase the weaving speed, when it falls below the proper range, decreases the weaving speed the welder to operate as,
Moreover, even after the operation of the weaving speed, the display of the bead overlap amount indicator, if it exceeds the proper range, the welder operated so as to reduce the welding speed, below the appropriate range In the case, a welding method using a welding machine equipped with a display, wherein the welding machine is operated so as to increase the welding speed.

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