JPH106007A - Remote controller for finely regulating welding current in welding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and quickly establish to a ready-made welding machine main body and remote control box without applying any work and to finely regulate a welding current or the like while continuing the welding work. SOLUTION: In a remote controller for finely regulating the welding current in the welding machine, which is provided with the welding machine main body 1 and a welding torch 2 and a remote control box 3, wherein a current regulator is operated by handling the dial knob 4 of the remote control box 3 to remotely regulate the welding current, the dial knob 4 of the remote control box 3 is turned with a battery powered motor 6 and winding of an endless belt 15 having a large stretching property, the main body 5 provided with the motor and battery is installed to the outside plate 7 of the remote control box, a switch part 8 putting ON/OFF the current to the motor is installed to the side face in the vicinity of the gripping part 9 of the welding torch 2, and the motor/battery of the main body and the switch part are connected with a covered wire 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote device for finely adjusting a welding current in a welding machine. More specifically, a welding operator himself / herself can increase or decrease a welding current set at the start of welding. The present invention relates to a device capable of finely adjusting the welding voltage to an appropriate one by remote control while continuing a welding operation, and also relates to a device capable of finely adjusting a welding voltage in a MIG welding machine.

[0002]

Prior to the start of welding, the welding current, welding voltage, etc., as one of the welding conditions, are based on the material / size / thickness of the base material (weld to be welded), type of welding rod, joint type, groove. Appropriate settings should be made according to the type, welding sequence, type of welding machine, and the like. The standard welding conditions at this time are, for example, JI
"Standard welding conditions" are shown in a graph in SZ 3604-1993 "Inert Gas Arc Welding Standard for Aluminum", which may be set by the welding machine body based on the graph.

[0003] However, from the graph of the above standard welding conditions, it is necessary to have experience and knowledge to find the actual welding conditions.
It is difficult to set an appropriate one according to each specific welding condition. Therefore, when performing a new welding work, generally, the welding method should be checked in advance for the test material of the target base material, and the welding current and other welding conditions at that time should be confirmed to be appropriate. The main welding is performed.

[0004] Even when the welding operation is started with the welding current and other welding conditions being set to appropriate values, if the thickness of the base material to be welded changes halfway, the welding is performed. It is necessary to fine-tune the conditions to be appropriate for the situation. This is because when the thickness of the base material is reduced, the welding current is too high and an undercut occurs in the base material. When the thickness is increased, the current is too low and the overlap occurs.

[0005] Fine adjustment of the welding current and the like during the welding operation may be performed at a distance of several tens of meters from the main body of the welding machine. (Control box), and the dial knob is operated to adjust an internal current regulator (for example, a variable resistor) so that the increase / decrease of the welding current or the like can be finely adjusted.

However, in the welding by the TIG welding method,
Welding is carried out by holding the welding torch (holder) in one hand and the welding rod in the other hand, so that the welding worker has both hands blocked, and the worker during welding can operate the dial knob on the remote control box. Can not do. If the welding operator himself tries to operate, the welding torch is turned off, the arc is once turned off, the dial knob is operated, and then the welding operation is restarted. However, once the arc is cut, the beads (weld metal) at the time of resuming welding often become mixed or chipped with air or other impurities, resulting in poor welding in many cases.

[0007] For this reason, an assistant was attached to the welding worker, and the welding operator instructed the assistant to operate the knob of the remote control box while continuing the welding work.
Communication between the welding worker with the protective surface and the assistant was not sufficiently achieved, and fine adjustment of welding current and the like could not be properly performed in many cases.

[0008] On the other hand, even in welding by the MIG welding method, a welding torch having a wire-shaped welding core material inserted therein is often held with both hands for stability, and the welding worker still has both hands closed. ing. As in the case of the TIG described above, the operator himself during welding cannot operate the dial knob of the remote control box, and once the arc is cut, air or other impurities are mixed into the bead or chipping occurs, resulting in poor welding. However, it was not possible to fine-tune properly by adjusting through assistants.

In order to solve the above problem, a push button or a dial type switch has been provided in the welding torch (holder) portion or a separate foot switch has been provided so that the welding operator himself can continue the welding operation. However, there have been proposed some switches which can be operated to finely adjust a welding current or the like.

A) Two push-button switches are attached to the holding portion of the welding torch of the arc welding machine, and the AC output of the auxiliary power supply of the welding machine is led to the welding rod holder via the pressure reducing transformer and the signal line.
The two pushbutton switches attached to the gripper feed back through a rectifier through a negative DC signal and a negative signal line, and operate either one of the two relays to switch the pole of the DC current to the motor, By rotating forward and backward, the drive shaft of the welding current adjusting resistor is linked to enable fine adjustment of the increase / decrease of the welding current (for example, Japanese Patent Application Laid-Open No.
No. 68180).

B) a power supply device having a current controller for changing a welding current value, an electrode holding torch connected to the current controller via a power cable, and a torch for setting a desired welding current. A dial for adjusting the welding current provided on the grip portion and a transmission cable for inputting a command set by the dial to the current controller are provided. By operating the dial of the torch grip portion, the current control in the power supply device is performed. The apparatus is controlled so that the increase / decrease of the welding current can be finely adjusted (for example, see Japanese Utility Model Application Laid-Open No. 58-76384).

C) In addition to the dial knob of the remote control box, four push-button switches for increasing / decreasing the welding current and voltage are independently provided on the holding portion of the arc welding torch. A sequence circuit is set up in the welding power supply to increase or decrease the welding current or voltage each time it is pressed, and the welding operator operates the switch on the grip of the torch during welding to adjust current and voltage. (See, for example, Japanese Utility Model Unexamined Publication No. 59-49466) by operating a variable resistor for adjusting the welding current and voltage.

D) a torch switch provided on the holding portion of the welding torch, a switch signal input circuit for inputting a switch signal from the switch, and switch signal determining means for determining a switch signal based on an output signal of the circuit. A current change pattern setting means for setting a current change pattern corresponding to the switch signal; and a control current generating means for inputting the current change pattern from the current change pattern setting means to generate a welding control current. A welding control current is generated by a switch signal of an operator operating a torch switch during welding so that a welding current of a welding machine can be controlled (see, for example, JP-A-2-133175).

E) A variable resistor for increasing / decreasing a welding current supplied to the welding torch in a remote control box, a worm wheel pivotally supported on a rotating shaft of the resistor, and a forward / reverse rotatable motor. An electric motor and a worm gear provided on the rotating shaft of the motor, and a separate foot switch is provided by an extension cable from the remote control box, and the welding operator operates the foot switch during welding to operate the electric motor in the remote control box. And a variable resistor that is rotated through a worm gear wheel to finely adjust the increase or decrease of the welding current (see Japanese Utility Model Laid-Open No. 3-62671).

[0015]

However, all of the conventional means described in a) to e) above have the following problems, and have not been widely used until they are generally used.

That is, in any of the above, the function of allowing the welding operator himself to finely adjust the welding current and the like during the welding operation is performed mechanically or in an electric circuit inside the welding machine main body or inside the remote control box. Therefore, it is necessary to manufacture the welding machine body or the remote control box from the design stage with the configuration having the function.

[0017] Therefore, a welding machine having this function is considerably more expensive than a welding machine having no such function. A person who purchases a welding machine without the function cannot add the function later. Therefore, we had to replace the welding machine or purchase a new welding machine with the function separately.

The present invention relates to a device which enables a welding operator to make fine adjustments of a welding current or the like during a welding operation, and aims to solve the problems of the above-mentioned conventional structure.
That is, an object of the present invention is to allow anyone to easily and quickly attach the apparatus without modifying the ready-made welding machine main body and remote control box, and to make welding current etc. while the welding worker himself continues the welding work. An object of the present invention is to provide a remote device for fine adjustment of a welding current of a welding machine, which can be finely adjusted.

[0019]

A remote device for finely adjusting a welding current of a welding machine according to the present invention has a welding machine main body 1, a welding torch 2, and a remote control box 3, and operates a dial knob 4 of the remote control box 3. In the remote device for fine adjustment of the welding current of the welding machine in which the welding current can be adjusted remotely by operating the current controller, the dial knob 4 of the remote control box 3 is connected to the battery-driven motor 6 and the endless belt having large elasticity. The main unit 5 provided with the motor 6 and the battery 11 can be mounted on the outer plate 7 of the remote control box 3.
A switch unit 8 for turning ON / OFF the electric current to the side of the welding torch 2 can be attached to a side surface of the welding torch 2 in the vicinity of the gripping unit 9.
0.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the above configuration, a main body 5 is provided with a motor 6 which can be rotated by a battery 11 and can be rotated forward and backward, and a small-diameter pulley 13 is mounted on a rotating shaft 12 of the motor 6. An endless belt 15 having high elasticity is provided so that the pulley 13 can be wound around the small-diameter peripheral portion 14 of the dial knob 4 of the remote control box 3.

The switch section 8 provided in the vicinity of the holding section 9 of the welding torch section 2 is provided with respective pushbutton switches 16 for rotating the motor 6 provided in the main body section 5 forward and backward.

The rotating shaft 1 of the motor 6 provided in the main body 5
2 is provided so as to be parallel to the rotation axis 17 of the dial knob 4 of the remote control box 3, but the position of the pulley 13 provided on the motor 6 in the axial direction is the axis of the small diameter peripheral portion 14 of the dial knob 4. It is preferable that the motor 6 or the pulley 13 be slidable in the axial direction so that the motor 6 or the pulley 13 is slidable in the axial direction so as to be on the same plane perpendicular to both axial directions with respect to the position in the direction, and the mounting position is preferably adjustable.

The above configuration will be described more specifically.
Generally, in the G welding machine, a current adjuster (not shown) is provided in the remote control box 3 so that the increase and decrease of the welding current such as the base current and the pulse current (or the crater current) can be adjusted. Two dial knobs 4a and 4b are provided so as to be operable.

Therefore, in the remote device for fine adjustment of the welding current of the welding machine according to the present invention, two motors 6a and 6b which can be rotated by the battery 11 and can be rotated forward and backward are provided in the main body 5.
Pulleys 13a and 13b having small diameters are mounted on the rotating shafts 12a and 12b of the motors 6a and 6b, respectively. Each of the pulleys 12a, 12b has a small diameter peripheral portion 14a, 14b of each dial knob 4a, 12b of the remote control box 3.
Endless belt 15a, which can be wound around
15b are provided.

The switch 8 attached to the side of the welding torch 2 near the grip 9 has a switch 2 provided in the main body 5.
Push button switches 16a1, 16a for turning ON / OFF the current for forward rotation and reverse rotation for each motor 6a, 6b
2, 16b1 and 16b2. Of the push-button switches 16a1, 16a2, 16b1, 16b2, between the forward switch and the reverse switch, two more than the height of each switch.
It is preferable to form a partition wall 41 that is higher by about 3 mm.

Each of the motors 6a and 6b is rotated by a battery 11 housed in the main body 5 to rotate each of the pulleys 13a and 13b.
・ Endless belts 15a, 15b ・ Dial knobs 4a, 4
Since the current regulator in the remote control box 4 can be operated through the rotation of b, any device can be used as long as it can exert sufficient rotational force. Each of the motors 6a,
It is desirable that the rotation speed and the rotation angle per unit time of 6b are not so large for fine adjustment.

In order to mount the main unit 5 on the outer side surface 7 of the remote control box 3, it is easy to mount the main unit 5 using a double-sided adhesive tape 20 or an adhesive, for example. Similarly, the switch section 8 can be easily attached to the holding section 9 of the welding torch 2 by using a double-sided adhesive tape 21 or an adhesive. However, the present invention is not limited to this, and a mounting band or another mounting tool may be used separately.

The endless belts 15a and 15b are
Each pulley 13a on the rotating shafts 12a, 12b of the
13b and each dial knob 4 of the remote control box 3
a, 4b, the distance between the axes of the small-diameter peripheral portions 14a, 14b and the small-diameter peripheral portions 14a, 14b of the dial knobs 4a, 4b.
A material having high elasticity is used in order to correspond to the outer diameter of b. For example, any type may be used as long as it is made of natural rubber or synthetic rubber, has sufficient elasticity and can be used as a belt.

The pulleys 13a and 13b have a small diameter.
The outer diameter is the small diameter peripheral portion 14 of the dial knobs 4a, 4b.
The diameters are smaller than the outer diameters of a and b, and the finer the adjustment, the greater the ratio. However, pulleys 13a, 1
In order to ensure that the endless belts 15a and 15b are wrapped around 3b and to use the dial knobs 4a and 4b of the ready-made remote control box 3, it is usually set to a range of about 1: 4 to 1:10. desirable. However, the dial knobs 4a and 4b may be configured such that the existing ones provided on the remote control box 3 are removed and replaced with separate ones.

When the remote device for finely adjusting the welding current according to the present invention is used by being attached to a ready-made welding machine, the following is performed. First, the main body 5 is mounted not on the front surface (the surface provided with the dial knobs 4a and 4b) of the remote control box 3 but on the outer surface 7 adjacent thereto, and pulleys on the rotating shafts 12a and 12b of the motors 6a and 6b are provided. 13a, 13b, endless belts 15a, 15b on the small diameter peripheral portions 14a, 14b of the dial knobs 4a, 4b of the remote control box 3, respectively.
Wrap around.

On the other hand, the switch section 8 is mounted on an appropriate position on the side surface near the grip section 9 of the welding torch 2. The mounting portion does not hinder the normal welding operation, and when fine adjustment of welding current or the like is necessary, the thumb of the hand holding the grip portion 9 can be easily pressed by each of the push button switches 16a1, 16a2,
The welding operator himself may decide so as to reach 16b1 and 16b2 in consideration of the shape of the holding portion 9 of the welding torch 2, the size of the hand, the state of use, and the like.

The attachment of the remote device for fine adjustment of the welding current to the welding machine is as described above.
There is no need to modify the remote control box 3 or any other special processing, and anyone can easily and quickly attach this device to a ready-made welding machine.

At the time of attachment, each pulley 13a, 13
b and small-diameter peripheral portions 14a, 1 of each dial knob 4a, 4b.
The endless belts 15a and 15b connecting 4b are made of a material having high elasticity. Therefore, the distance between the axes of the pulleys 13a and 13b and the small-diameter peripheral portions 14a and 14b differs depending on the model of the ready-made remote control box 3, or the small-diameter peripheral portions 14a and 14b of the dial knobs 4a and 4b.
Endless belts 15a, 15b
Absorbs the difference with great elasticity, and can always be wound around with the proper tension.

Similarly, at the time of attachment, the pulleys 13a, 13b on the motors 6a, 6b or their rotating shafts 12a, 12b.
If the position of b can be adjusted and fixed by sliding in the axial direction, the position of the small-diameter peripheral portions 14a and 14b of the dial knobs 4a and 4b in the axial direction differs depending on the model of the ready-made remote control box 3. Each pulley 13a,
Since the position of 13b can be set so as to be on the same plane as the small-diameter peripheral portions 14a and 14b, the endless belts 15a and 15b are wound without being inclined in the axial direction. Even on this surface, the endless belts 15a and 15b are always appropriate. Wrapped around.

Further, since the remote device for fine adjustment of the welding current uses the battery-driven motors 6a and 6b, it is not necessary to take out the driving force from the welding machine body 1 or the remote control box 3, and the switch unit 8 and the The motor 6a of the main body 5,
There is no need to pass the covered wire 10 between the battery 6b and the battery 11 through the welding machine body 1 or the remote control box 3, so that the wiring is not troublesome and does not hinder the welding operation.

As described above, even when the welding operation is performed by attaching the remote device for fine adjustment of the welding current to a ready-made welding machine, the base material to be welded (material to be welded) before the start of welding is the same as before. The welding current, voltage, etc., one of the welding conditions, according to the material, size, thickness, welding rod type, joint type, groove type, welding sequence, type of welding machine, etc. of the welding machine body 1 or remote control box 3 Operate the dial knob to set it properly.

If the thickness of the base metal to be welded changes halfway after starting the welding operation under the welding conditions, it is necessary to finely adjust the welding current, voltage, etc., to appropriate values for the situation. However, when the remote device for fine adjustment of the welding current is attached, the welding worker attaches the welding torch 2 to the holding portion 9 with a thumb while holding the holding portion 9 while continuing the welding operation. A certain switch section 8 may be operated.

If it is desired to finely adjust the base current or the pulse current (or the crater current) of the welding current in the increasing direction, the pushbutton switches 16a1 and 16b1 for the forward rotation of the motor among the pushbutton switches for adjusting the current of the switch section 8 are pressed. If fine adjustment in the decreasing direction is desired, the pushbutton switches 16a2 and 16b2 for reverse rotation of the motor may be pressed. Each push button switch 1
6a1, 16a2, 16b1, and 16b2, depending on the pressing time, through the covering wire 10 extending from the switch section 8,
The current from the battery 11 causes the motors 6a and 6b of the main body 5 to rotate forward or reverse.

As a result, the small-diameter pulleys 13a and 13b on the rotating shafts 12a and 12b rotate forward or backward, and each dial knob of the remote control box 3 is rotated via the endless belts 15a and 15b wound therearound. 4a, 4b
Is rotated. At this time, since the outer diameter ratio between the pulleys 13a, 13b and the dial knobs 4a, 4b is considerably large as described above, the number of rotations and the number of rotations of the respective dial knobs 4a, 4b with respect to the number of rotations of the motors 6a, 6b. Since the angle is small and the operation of the current regulator is little by little, the welding current is finely adjusted in the increasing or decreasing direction.

In the MIG welding machine, generally, a dial knob for current adjustment and a dial knob for voltage adjustment are provided on the remote control box 3 so that the increase and decrease of the welding current and the welding voltage can be adjusted. 7). Therefore, in order to use the remote device for fine adjustment of the welding current of the present welding machine for the MIG welding machine, the respective rotating shafts 12a, 12b of the respective motors 6a, 6b are required.
endless belt 1 wrapped around pulleys 13a and 13b on b
5a and 15b are connected to the small diameter peripheral portions 14 of the dial knobs 4a and 4b for controlling the current and the voltage of the remote control box 3, respectively.
a and 14b may be wound around each. Also welding torch 2
Each of the push button switches 16a1, 16a2, 16b1, 16b2 of the switch unit 8 mounted on the side surface near the gripper 9
The current may be used for increasing / decreasing adjustment and the voltage may be used for increasing / decreasing adjustment.

It should be noted that each of the push button switches 16a1 and 16b1 for forward rotation of the switch section 8 and the push button switch 16a for reverse rotation
If a partition wall 41 having a height higher than each switch is formed between 2 and 16b2, the push button switch 16a for normal rotation is formed.
Pushbutton switches 16a2 and 16b for reverse rotation with 1 and 16b1
This eliminates the mistake of pushing 2 and pushing simultaneously, and when the torch 2 is placed on the floor, each push button switch may accidentally turn on or be damaged by hitting something. Is prevented.

[0042]

1 to 6 show an embodiment in which a remote device for finely adjusting the welding current of a welding machine according to the present invention is attached to a TIG welding machine.

The welding machine is the same as the one for the ready-made TIG welding method. Reference numeral 1 denotes a welding machine main body, 2 denotes a welding torch, and 3 denotes a remote control box. And a tube 22 that bundles a power supply cable, a gas supply pipe, a water supply hose, a drainage hose, and the like. Here, the welding machine body 1 is an inverter-controlled welding machine, which is a mainstream in recent years. The welding machine main body 1 is connected to a remote control box 3 for adjusting welding current by a remote control cable 23.

The remote control box 3 has a built-in current adjuster (not shown) capable of adjusting a base current and a pulse current (or a crater current) therein, and has rotating shafts 17a and 17b capable of adjusting the current adjusters. Two dial knobs 4a and 4b are provided outside through the intermediary. Here, a variable resistor is used as the current regulator, and the outer diameter of each small-diameter peripheral portion 14a, 14b of each dial knob 4a, 4b is about 21 mm here.

The remote device for finely adjusting the welding current of the welding machine according to the present invention comprises a main body 5 which can be mounted on the remote control box 3 and a switch 8 which can be mounted near the grip 9 of the welding torch 2. The battery 11 of the main body 5, the motors 6a and 6b, and the switch 8 are connected by a covered wire 10.

The main unit 5 is provided in a main unit case 25 attachable to the outer surface 7 of the remote control box 3 for adjusting a base current and a pulse current (or a crater current).
Two motors 6a and 6b, each capable of forward and reverse rotation, are built in. Each of the motors 6a and 6b is
The horizontal axis of the dial knobs 4a and 4b is provided horizontally in the front-rear direction in the main body case 18 so that the axes of the dial knobs 4a and 4b are parallel to the rotation axes 17a and 17b of the dial knobs 4a and 4b. is there.

The main body case 18 has a horizontal width and a front-rear width substantially equal to the horizontal width and the front-rear width of the remote control box 1, has a U-shaped vertical cross section with an open front surface, and is made of, for example, aluminum, iron or hard material. It may be made of plastic, but here is made of aluminum alloy. A front plate 24 made of a transparent plastic plate is provided on the front surface of the main body case 18 so as to cover the dial knobs 4a and 4b of the remote control box 3 on the front surface.
It is attached at.

The main body 5 is mounted on the remote control box 3 by placing the bottom plate of the main body case 18 on the upper plate 7 of the remote control box 3, here with a double-sided adhesive tape 20.
It is fixed.

Each of the motors 6a and 6b in the main body 5 has a voltage of 3 volts, a current consumption of 640 mA, and 5900 rpm.
m is used. Although the motors 6a and 6b are sufficient at this level, the present invention is not limited to this, and the motors 6a and 6b rotate with one or two or less batteries and have endless belts 15a and 15b.
Any device having a driving force capable of rotating the dial knobs 4a, 4b and the variable resistor via the control unit may be used.

Each motor 6a, 6
For mounting b, long holes 27a and 27b are formed in the upper plate of the main body case 18 in the front-rear direction (the same direction as the rotating shafts 12a and 12b of the motors 6a and 6b), and a U-shaped motor section having a vertical cross section The motors 6a, 6b are held by the metal fittings 28a, 28b, and the ear pieces on both sides of the metal fittings 28a, 28b are screwed from the outside of the main body case 18 through the long holes 27a, 27b.
9b can be inserted and tightened and fixed.

The mounting of the motors 6a and 6b is different from that described above, as shown in FIG.
A and 28b may be fixed, and a rubber plate 26 may be attached to the inner peripheral surfaces of the mounting brackets 28a and 28b, and the mounting position may be adjusted by sliding each motor 6 in the axial direction.
Although not shown, the pulleys 13a and 13b slide on the rotating shafts 12a and 12b of the motors 6a and 6b, respectively.
The mounting position may be adjustable.

The distance between the axes of the two motors 6a and 6b provided in the main body case 18 is substantially the same as the distance between the axes of the two dial knobs 4a and 4b of the remote control box 3. Here, it is set to about 80 mm. A battery housing 19 described below is provided between the two motors 6a and 6b in the main body case 18.

The rotating shafts 12a of the motors 6a, 6b,
Each of the pulleys 13a and 13b attached to the 12b has flanges on both outer sides so that the wound endless belts 15a and 15b do not easily come off. Each of the pulleys 13a,
13b has a small diameter, and here, dial knob 4a,
4b, the outer diameter of the small-diameter peripheral portions 14a, 14b is about 2 as described above.
Although the diameter is 1 mm, an outer diameter of about 5 mm is used.

The battery 11 housed in the battery housing 19 of the main body 5 is a small, lightweight AA
Two of them are used, and they are arranged in series so that a voltage of 3 volts can be obtained.

The endless belts 15a and 15b differ in the distance between the shafts between the pulleys 13a and 13b and the small-diameter peripheral portions 14a and 14b of the dial knobs 4a and 4b depending on the type of the remote control box 3, and the small diameter of the dial knobs 4a and 4b. Circumference 1
In order to cope with the difference between the outer diameters of 4a and 14b, a synthetic rubber having high elasticity is used. Here, each pulley 1
3a, 13b and small diameter peripheral portion 1 of dial knobs 4a, 4b
The center distance between the shafts 4a and 14b is about 57 mm, and the endless belts 15a and 15b used here have a width of about 5 mm, a thickness of about 1 mm, and a normal inner diameter of about 43 mm.

The switch section 8 is provided near the holding section 9 of the welding torch 2 because this embodiment is for a TIG welding machine.
push button switch 16a1 for reverse rotation of a and push button switch 16a2 for reverse rotation, and push button switch 1 for forward rotation of the motor 6b for adjusting pulse current (or crater current)
6b1 and a total of four pushbutton switches 16b2 to reverse.

The switch unit 8 includes the battery 1 in the main unit 5.
1 and a covering wire 10 connected to each of the motors 6a and 6b. The switch portion 8 is housed in a rubber switch cover 30 having both dustproofness and waterproofness, but has flexibility such that it can follow the outer peripheral curved surface of the holding portion 9 of the welding torch 2. . In order to mount the switch portion 8 on the holding portion 8 of the welding torch 2, the back surface of the switch cover 30 may be mounted with a double-sided adhesive tape 21.

In the switch section 8, a partition wall 41 which is higher than the height of the switch by about 2 to 3 mm is formed between each of the push button switches 16a1, 16a2, 16b1 and 16b2 for normal rotation and reverse rotation. is there. This prevents the welding operator from switching the pushbutton switches 16a1 and 16a2 for normal rotation and the pushbutton switches 16b1 and 16b2 for reverse rotation and pressing them at the same time, such as when the torch part 2 is placed on the floor. Push button switches 16a1, 16a2, 16
The b1 and 16b2 will not be accidentally turned on or damaged by hitting something.

FIG. 4 is a circuit diagram of an embodiment of the remote device for fine adjustment of the welding current, the upper half of which is for adjusting the base current, and the lower half for adjusting the pulse current (crater current). However, here, the configuration is the same, and the description will be made on the case where the base current is adjusted.

In the above circuit diagram, the contacts 31, 32
Is turned on in conjunction with pressing a push button switch 16a1 for rotating the motor 6a for adjusting the base current in the forward direction. The contacts 33 and 34 press the push button switch 16a2 for rotating the motor 6a in the reverse direction. ON when linked
The ones that work are shown. These push button switches 16a1,
16a2 is a contact (normally open), both ON type (double cut type)
Using a switch.

In the circuit diagram, reference numerals 37 and 38 denote bias circuits for reverse rotation of the motor. The former 37 reverses the motor 6a from one contact 31 of the push button switch 16a1 for normally rotating the motor 6a for adjusting the base current. Push button switch 16
a2 is connected to one contact 36 of the push button switch 16a1 for rotating the motor 6a in the reverse direction from the other contact 32 of the push button switch 16a1 for rotating the motor 6a in the forward direction.
a2 is connected to another contact 35.

Further, in the same figure, reference numeral 39 denotes a battery side circuit which is connected from the positive and negative electrodes of the battery 11 to the contacts 31, 32 of the push button switch 16a1 on the forward side of the motor.
Is a motor-side circuit, which is connected from the positive / negative electrode of the motor 6a to the other contacts 33 of the push button switch 16a2 on the motor reverse side.
34.

[0063]

The above-described remote device for fine-tuning the current is connected to an existing T
To be attached to a welding machine for the IG welding method, the main body 5
Is attached to the remote control box 3 with a double-sided adhesive tape 20, and the rotation shafts 12a,
From the respective pulleys 13a and 13b on the 12b, the small diameter peripheral portion 14 of each dial knob 4a and 4b of the remote control box 3
Endless belts 15a and 15b may be wound around a and 14b, respectively.

At this time, the pulleys 13a, 13b on the rotating shafts 12a, 12b depend on the type of the remote control box 3 and the like.
And small diameter peripheral portions 14a, 14 of each dial knob 4a, 4b
b and the small-diameter peripheral portions 14a, 14
b, the endless belts 15a, 15b
The large elasticity absorbs the difference and is always wrapped around the proper tension.

If the pulleys 13a, 13b and the small-diameter peripheral portions 14a, 14b of the dial knobs 4a, 4b are not on the same plane orthogonal to the axial direction, the mounting brackets 28a for the motors 6a, 6b are used here. , 28b screw 29
a, 29b and loosen the metal fittings 28a, 28b
a, 27b to adjust the mounting position and tighten and fix.

In the above embodiment, if the welding operator wants to finely adjust the base current in the increasing direction while continuing the welding operation, the thumb of the hand holding the gripping portion 9 of the welding torch 2 is used.
Among the pushbutton switches for adjusting the base current of the switch section 8,
Press the push button switch 16a1 for forward rotation of the motor. Since the two contacts 31 and 32 shown in FIG. 4 are closed in conjunction with each other for the time during which the push button switch 16a1 is pressed, the current from the battery 11 passes through the battery-side circuit 39 and the closed contact 31.
The current flows through the motor-side circuit 40 to the motor 6a via one contact point 33 of the push button switch 16a2 for reverse rotation of the motor, thereby rotating the motor 6a forward.

The forward rotation of the motor 6a is controlled by the pulley 13a.
-The dial knob 4a of the remote control box 3 is rotated forward through the endless belt 15a, and the internal variable resistor is operated to finely adjust the base current in a direction to increase.

When it is desired to finely adjust the base current in the decreasing direction, the pushbutton switch 16a2 for reverse rotation of the motor is selected from the pushbutton switches for adjusting the base current of the switch section 8 of the switch section 8 similarly provided on the grip section 9 of the welding torch 2. Push. By the push button switch 16a2, the contacts 33, 35 (3
4 and 36), the current from the battery 11 is connected to the motor side circuit 40 via the battery side circuit 39, the reverse rotation bias circuit 37, and the closed contact 34 (36). It flows in the direction and enters the motor 6a for adjusting the base current, and reverses the motor 6a.

The reverse rotation of the motor 6a causes the pulley 13a
-The dial knob 4a of the remote control box 3 is reversely rotated via the endless belt 15a, and the internal variable resistor is operated to finely adjust the base current in the decreasing direction.

In the above description, the case where the base current is increased or decreased is described. However, when it is desired to increase or decrease the pulse current (or the crater current), the gripping portion 9 of the welding torch 2 is also required.
Push button switches 16b1 and 16b for adjusting a pulse current (or a crater current) in the switch section 8 provided in the vicinity.
Press 2. Thus, as shown in the circuit diagram in the lower half of FIG. 4, a current flows in the same manner as described above, and the motor 6b for adjusting the pulse current (or crater current) rotates forward or reverse, and the pulley 13b and the endless belt 15b , The dial knob 4b of the remote control box 3 is rotated forward or backward to operate the variable resistor to finely adjust the pulse current (or the crater current) in the increasing / decreasing directions.

[0072]

As apparent from the above description, the remote device for finely adjusting the welding current of the welding machine according to the present invention can be easily and quickly attached without modifying the ready-made welding machine body and remote control box. This allows the welding operator to make fine adjustments to the welding current and the like while continuing the welding operation.

That is, some remote devices have been proposed in the past that allow the welding operator himself to finely adjust the welding current and the like while continuing the welding operation. However, these adjustments are performed mechanically or in an electric circuit inside the welding machine main body or the remote control box, and it was necessary to manufacture the welding machine main body or the remote control box in a configuration having the function from the design stage. . Therefore, a welding machine with this function becomes expensive, and those who purchase a welding machine without this function can not be attached to have the function later, or buy a welding machine with that function, Another one
We had to purchase a welding machine with that function, which was not economically easy and uneconomical.

On the other hand, the remote device for fine adjustment of the welding current of the welding machine according to the present invention has a very simple configuration as described above, so that the cost can be reduced. Therefore, even if the welding machine is not equipped with this type of equipment, even if it is installed later, there is no great burden economically, and the welding operator himself can continue welding work by simply installing this equipment. Can be fine-tuned.

Further, the work of attaching the remote device for fine adjustment of the welding current of the welding machine according to the present invention to a ready-made welding machine is performed by mounting the main body containing the motor and the battery on the outer surface of the remote control box, It is only necessary to wind an endless belt around each dial knob of the remote control box from the small diameter pulley on the rotating shaft, and attach the switch unit to the gripping portion of the welding torch. Therefore, there is no need to make any modification or processing to the ready-made welding machine body or remote control box, and anyone can easily and quickly attach this apparatus.

At the time of attachment, the endless belt connecting each pulley and the small-diameter peripheral portion of each dial knob is made of a material having high elasticity. Therefore, the shaft of each pulley and the small-diameter peripheral portion depends on the type of a ready-made remote control box. Even if there is a difference in the distance, or even if there is a difference in the outer diameter of the small-diameter peripheral portion of each dial knob, the endless belt absorbs the difference with great elasticity,
An endless belt can always be wound between each pulley and each small-diameter peripheral portion with an appropriate tension.

Further, if the position of each pulley on the motor or its rotating shaft can be fixed by sliding in the axial direction at the time of the above attachment, if each mounting position can be adjusted and fixed, each dial can be used depending on the model of the ready-made remote control box. Even if the position of the small-diameter peripheral part of the knob is different in the axial direction, the position of each pulley can be set so that it is on the same plane as the small-diameter peripheral part, so always wrap the endless belt properly on this surface. Can be.

Further, since the remote device for fine current adjustment of the present invention uses the battery-driven motor of the main body, it is not necessary to take out the driving force from the welding machine main body or the remote control box. It is not necessary to draw the sheathed wires connecting the battery and motor of the main body to the welding machine main body and the remote control box. For this reason, the troublesome handling of the signal cable as in the related art and the cable do not obstruct the welding operation are eliminated.

If a partition wall having a height higher than that of each switch is formed between each of the push button switches for normal rotation and each of the push button switches for reverse rotation in the switch section, the push button switches for forward rotation and reverse rotation are erroneously pressed. In addition, when the torch portion is placed on the floor, it is possible to prevent the respective pushbutton switches from being accidentally turned on when hitting something or being damaged.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing an embodiment in which a remote device for fine adjustment of welding current of a welding machine according to the present invention is attached to a TIG welding machine.

FIG. 2 is a perspective view showing an embodiment of a main body of a remote device for fine adjustment of welding current of a welding machine according to the present invention.

FIG. 3 is a partially longitudinal side view showing an embodiment of a remote device for fine adjustment of a welding current of a welding machine according to the present invention.

FIG. 4 is a circuit diagram used in an embodiment of a remote device for fine adjustment of welding current of a welding machine according to the present invention.

FIG. 5 is a partially longitudinal side view of another embodiment of the main body of the remote device for finely adjusting the welding current of the welding machine according to the present invention.

FIG. 6 is a perspective view showing an embodiment of a switch unit of the remote device for fine adjustment of welding current of the welding machine according to the present invention.

FIG. 7 is a schematic front view showing an embodiment in which a remote device for fine adjustment of welding current of a welding machine according to the present invention is attached to a MIG welding machine.

[Explanation of symbols]

1-Welder body 14-Small diameter part 25
-Hinge part 2- Welding torch 14a-Small diameter peripheral part 26
-Rubber plate 3-Remote control box 14b-Small diameter peripheral part 27
a-Long hole 4-Dial knob 15-Endless belt 27
b-Long hole 4a-Dial knob 15a-Endless belt 28
a-Mounting bracket 4b-Dial knob 15b-Endless belt 28
b-Mounting bracket 5-Body 16-Pushbutton switch 29
a- Screw 6-Motor 16a1-Pushbutton switch 29
b- Screw 6a-Motor 16a2-Pushbutton switch 30
-Switch cover 6b-Motor 16b1-Push button switch 31
-Contact 7-Outer plate 16b2 -Pushbutton switch 32
-Contact 8-Switch section 17-Rotating axis 33
-Contact 9-Grasping part 17a-Rotating shaft 34
-Contact 10-Coated wire 17b-Rotating shaft 3
5-contact 11-battery 18-body case 3
6-Contact 12-Rotating Axis 19-Battery Storage Unit 3
7-bias circuit 12a-rotary shaft 20-double-sided adhesive tape 3
8-bias circuit 12b-rotary shaft 21-double-sided adhesive tape 3
9-Battery side circuit 13-Pulley 22-Tube 4
0-motor side circuit 13a-pulley 23-remote control cable 4
1-partition wall 13b-pulley 24-front plate

Claims (5)

[Claims] 1. A welding machine comprising a welding machine body 1, a welding torch 2 and a remote control box 3, wherein a current controller is operated by operating a dial knob 4 of the remote control box 3 to enable remote control of a welding current. In the remote device for fine current adjustment, the dial knob 4 of the remote control box 3 is rotated by winding a battery-driven motor 6 and an endless belt 15 having high elasticity, and the motor 6 and the battery 11 are provided. The main body 5 can be mounted on the outer plate 7 of the remote control box 3, and a switch 8 for turning ON / OFF the current to the motor 6 of the main body 5 is provided on a side surface of the welding torch 2 near the grip 9. A remote device for fine adjustment of welding current of a welding machine, which can be mounted and connects the motor 6 / battery 11 of the main body unit 5 and the switch unit 8 with a covered wire 10. 2. A remote device for fine adjustment of welding current of a welding machine according to claim 1, wherein a motor 6 rotatable by a battery 11 and capable of rotating forward and reverse is provided in the main body 5. Rotary axis 12 of
A small-diameter pulley 13 is mounted on the pulley 13, and an endless belt 15 having a large elasticity is provided on the pulley 13 so that the endless belt 15 can be wound around the small-diameter peripheral portion 14 of the dial knob 4 of the remote control box 3. Remote adjustment device. 3. The remote device for fine adjustment of welding current of a welding machine according to claim 1, wherein the switch unit 8 includes a push button switch 16 for normal rotation and reverse rotation of the motor 6 provided in the main body unit 5. A remote device for fine adjustment of welding current of a welding machine. 4. A remote device for fine adjustment of welding current of a welding machine according to claim 1, 2 or 3, wherein a motor 6 in the main body 5 has a rotating shaft 12 which is turned by a dial knob 4 of the remote control box 3. The position of the pulley 13 in the axial direction of the rotary shaft 12 is perpendicular to the axis of the dial knob 4 with respect to the position of the small-diameter peripheral portion 14 in the axial direction. A remote device for fine adjustment of welding current of a welding machine, wherein a motor 6 or a pulley 13 is slidable in the axial direction so as to be positioned on a surface and can be positioned and fixed. 5. A welding machine comprising a welding machine body 1, a welding torch 2 and a remote control box 3, wherein each of the current regulators is operated by operating two dial knobs 4 of the remote control box 3 so that the welding current can be remotely adjusted. In the remote device for fine-tuning the welding current of the machine, two motors 6a and 6b which can be rotated by a battery 11 and can be rotated forward and backward are provided in the main body 5 by rotating shafts 1 thereof.
2a and 12b are provided so as to be parallel to the rotation shafts 17 of the dial knobs 4a and 4b of the remote control box 3, and small-diameter pulleys 13a and 12b are respectively mounted on the rotation shafts 12a and 12b of the motors 6a and 6b. 13b, and each pulley 1
The position of the dials 3a and 13b in the axial direction is indicated by the dial knob 4.
The motors 6a, 6b or the pulleys 13a, 13b are slid in the axial direction so as to be positioned on the same plane orthogonal to the axis with respect to the positions of the small diameter peripheral portions 14a, 14b in the axial direction of the a, 4b. The pulleys 12a and 12b can be fixed, and the small diameter peripheral portions 14a and 14b of the dial knobs 4a and 4b of the remote control box 3 can be fixed.
Endless belt 15a, which can be wound around
15b, and the switch unit 8 includes motors 6a,
Each of the push button switches 16a1, 16a1 for forward rotation and reverse rotation of 6b
A remote device for fine adjustment of welding current of a welding machine, provided with 16a2, 16b1 and 16b2.