JPH10230358A - Tig welding equipment used in tig welding and burn removing in common - Google Patents

Abstract

PROBLEM TO BE SOLVED: To speed up a working speed and to reduce the electric power consumption by replaceing parts in the tip end part of a TIG welding torch with a burn removing electrode holder and switching the selector switch of a welding power source part from the TIG side to the burn removing side. SOLUTION: The TIG welding and burn removing torch is made to function as the TIG welding torch in the case of the combination of codes 1-7 and is made to function as the burn removing work torch in the case of the combination of codes 1-3 and codes 8-11 in accordance with the purpose of working. The thread ridge of the burn removing electrode holder 8 is made longer than the thread ridge of a collect body 5, a cap 2 is screwed into the thread part within a touch body 1, both tip ends of the burn removing electrode holder 8 and the cap 2 are fixed, and the angle of a burn removing electrode plate 10 is optionally varied. On the other hand, TIG welding or burn removing work is simply selected by switching the selector switch. Also, a gas pressure sensor is provided in an inert gas circuit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to TIG welding of stainless steel and the like and TIG welding and scoring TIG for cleaning a discolored portion by welding of the surface of a workpiece such as a stainless steel by an electrochemical method. It relates to a welding device.

[0002]

2. Description of the Related Art For example, when performing TIG welding of stainless steel or the like, a TIG welding torch is used for performing burn-off work after welding stainless steel or the like.
It is general that burnt torches are prepared and used separately.

As an example of an apparatus for welding the above stainless steel or the like, as shown in FIG. 5, there is an apparatus 31 for welding or scoring with an object to be welded 27. The term "burnout" as used herein is a concept that includes not only the work of electrochemically removing and cleaning discolored portions caused by welding of the surface of a workpiece such as stainless steel, but also the polishing of tungsten or cobalt itself. . In addition, "stainless steel etc." here means all stainless steel materials including general carbon steel.
Includes titanium, tungsten and cobalt.

In the TIG welding apparatus 31 for both TIG welding and scorching, the TIG welding apparatus includes a workpiece 2
7, a TIG welding torch 32, a TIG welding power supply / burning power supply 33, an inert gas cylinder 24, a primary input power supply 34, a power cable and a control cable for connecting the devices to each other, and a gas hose.

[0005] As a scoring device, a scoring torch 35 is used instead of the TIG welding torch 32 in the above combination.
Is connected, and the inert gas is unnecessary, so that it is not necessary to prepare the inert gas cylinder 24.

In the case of FIG. 5, the power supply 33 has a function for both welding and scoring, but a TIG welding power supply and a dedicated power supply are prepared respectively as a TIG welding power supply and a TIG welding power supply. It is a matter of course that two different operations may be performed by using independent devices as the device and the burning device.

Therefore, in order to perform TIG welding and scorching work, naturally, two kinds of torches, a TIG welding torch 32 and a scorching torch 35, are prepared, and each time they are replaced with a torch suitable for either operation. It was necessary to prepare a TIG welding device and a burning device suitable for each operation.

FIG. 6 shows an example of a burning torch.
Reference numeral 35 denotes a burning torch, reference numeral 8 denotes a burning electrode holder, reference numeral 9 denotes a set bolt for an electrode plate, reference numeral 10 denotes an electrode plate, reference numeral 11 denotes a mop, reference numeral 12 denotes a torch holder, reference numeral 13 denotes a torch switch, and reference numeral 14 denotes a control. Reference numeral 16 denotes a power cable.

FIG. 7 is a perspective view schematically showing a state in which a stainless steel plate is butt-butted and a seam is removed halfway after TIG welding. Reference numeral 41 denotes an object to be welded (stainless steel), reference numeral 42 denotes a discolored portion by welding, reference numeral 43 denotes a weld bead, and reference numeral 44 denotes an area in which the discolored portion on the surface has been cleaned and cleaned by welding. .

[0010] The mop 11 of the scorch torch 35 is impregnated with an electrolytic solution and interposed between the electrode plate 10 and the workpiece 41, and a current for scorch is applied to perform electrolysis, thereby forming a discolored portion due to welding. Clean electrochemically. If the burning speed is too slow, the progress of the above-mentioned operation affects the base material of the work to be welded, resulting in a polishing state.
By actively utilizing this state, it can be applied not only to burnout of a welded portion but also to polishing of metal.

Further, although an example of burning after TIG welding is shown here, for example, burning around spot welding marks in resistance welding and burning of discolored portions generated on both sides of the seam line by seam welding. There are various application areas of burning work.

[0012]

By the way, in order to alternately perform the TIG welding operation and the scorching operation in the above-mentioned conventional technology, it is necessary to prepare two types of torches, a welding torch and a scorching torch. In addition, the TIG welding torch 32 is connected to the dual power source 33 for the TIG welding work as shown in FIG.

When two types of TIG welding device and burning device are independently installed, it is necessary to prepare two types of power sources, which is costly and requires a large installation space. Was.

[0014]

DISCLOSURE OF THE INVENTION The present invention has been proposed in view of the above problems, and has a structure in which only a part at the tip of a TIG welding torch is replaced with a burn-out electrode holder, so that the torch can be TIG-welded. The welding power source can be provided with a welding power source that can easily switch between welding conditions that meet TIG welding operations and those that meet burning operations by using a changeover switch on the welding power source. It has become possible.

[0015]

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

FIGS. 1 to 4 show an embodiment of the present invention. FIG. 1 shows a TIG welding and scoring T of the present invention.
FIG. 2 is a perspective view showing the entire configuration of the IG welding apparatus, and a torch 22 for both TIG welding and scorching, which is a feature of the present invention, is shown in FIG. 1 in a set state of TIG welding, that is, in a state shown in FIG. FIG. 3 shows the setting state of the burn-off operation.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described sequentially with reference to FIGS.

In FIG. 1, reference numeral 21 denotes a TIG welding / burning-out TIG welding apparatus, reference numeral 22 denotes a TIG welding / burning-out torch, reference numeral 23 denotes a TIG welding / burning-off TIG welding power source, and reference numeral 24 denotes an inert gas cylinder. Sign 2
5 is a 200V AC power supply, 26 is a 100V AC power supply,
Reference numeral 27 indicates an object to be welded.

FIG. 2 is a perspective view of the torch 22 in a TIG welding set state in a torch for both TIG welding and burning, and FIG. 3 is a perspective view of the torch 22 in a burning setting state of the torch. . Further, FIG. 4 is an exploded perspective view showing a main part for explaining a state in which the torch is replaced with a dual-purpose function.

2 to 4, reference numeral 1 denotes a torch body, reference numeral 2 denotes a cap, reference numeral 3 denotes packing, and reference numeral 4 denotes a torch body.
Is a collet, 5 is a collet body, 6 is a gas nozzle, 7 is a non-consumable electrode, 8 is a burnout electrode holder, 9 is a set bolt for an electrode plate, 10 is an electrode plate, 11 is a mop, and 11 Reference numeral 12 denotes a torch holder, reference numeral 13 denotes a torch switch, reference numeral 14 denotes a control cable, and reference numeral 15 denotes a power cable and a gas hose.

The torch 22 for both TIG welding and scorching
Depending on the purpose of the work, the combination of reference numerals 1 to 7 functions as a TIG welding torch, while the combination of reference numerals 1 to 3 and reference numerals 8 to 11 functions as a scoring work torch.

One of the major features of the present invention is that a single torch is used for both TIG welding and burning.

A torch 2 for both TIG welding and scorching, which is set on the scorching work torch shown in FIG.
In 2, the cap 2 is screwed into the torch body 1 by screwing the cap of the torch body 1 by making the thread of the burnout electrode holder 8 longer than the thread of the collet body 5.
Both ends of the burning electrode holder 8 and the cap 2 can be fixed. As a result, the angle of the burning electrode plate 10 can be set to 36.
0 ° can be arbitrarily changed, and the working posture as the scorch torch can be easily changed.

On the other hand, by switching a changeover switch (not shown) in the TIG welding power supply 23 for both TIG welding and burning, either TIG welding or burning can be easily selected. Further, a gas pressure sensor (not shown) is provided in the inert gas circuit of the welding power source, and the TIG welding and scorching torch 22 switches from the TIG welding setting state to the scoring set state. In the case of rearrangement, since the collet body 5 having the inert gas discharge hole 5a in the torch portion is replaced with the burnout electrode holder 8, the gas circuit is closed and the inert gas is released. And the gas circuit is under pressure, and by the gas pressure sensor,
In combination with the changeover switch of the welding power supply unit, during the burning operation, an interlock function is provided so that the operation can be performed only when the changeover switch is set to the burning side, and the height of the electrode plate for burning is high. Consideration is given to safety so that no voltage is generated.

Generally, for the purpose of reliably starting an arc during TIG welding, a high DC voltage several times to several tens times the normal arc voltage is applied to the welding torch for a short period of time until the arc is generated. A reliable arc is generated by superimposing and applying a normal arc voltage between the welding objects. As another method, a high-frequency voltage is applied between a welding torch and an object to be welded, and a high-frequency voltage is applied for the purpose of reliably starting an arc.

In any case, a voltage higher than a normal arc voltage must be applied. The “high voltage” here refers to the voltage applied at the start of TIG welding. I have.

As a precautionary measure, the meaning of "TIG welding" here is ascertained. This welding refers to non-consumable electrode gas shield arc welding itself.

Further, TIG welding and burning TIG
In the welding device, the welding power source is a DC power source, and the input voltage is automatically switched within the power source to reduce the power source voltage to one.
It can be used for both 00V and 200V. In addition to the TIG welding work, you can select whether or not the pulse is used in the scoring work. In addition, the torch switch is turned off during welding or scoring processing.
The TIG welding and scoring combined TIG welding apparatus having a self-holding function so that the work can be performed even in the state described above, has an input power supply voltage AC100V / AC200V automatic switching function. For this reason, it is possible to prevent accidents such as malfunctions with a wide power supply voltage and burnout due to overvoltage.

Further, a switch (not shown) for selecting the presence / absence of a pulse is provided in the dual-purpose welding power supply unit. With this switch, welding with or without a pulse or welding or burning can be arbitrarily selected.

In particular, by selecting the presence of a pulse and using a pulse current in the burning treatment,
There is also an advantage that the burning time is shortened and the power consumption is reduced.

Further, when a welding current or a scoring current starts and a welding current or a scoring current flows, the dual-purpose welding power source also has a convenient self-holding function that allows the operation to continue even if the torch switch 13 is released. I have it.

[0032]

As described above, according to the TIG welding and scoring combined TIG welding apparatus of the present invention, since the TIG welding and scorching combined torch is used, it is only necessary to replace the tip of the combined torch tip. In addition, the function of the torch can be easily changed between TIG welding and scoring.

When the dual-purpose torch is set for burning, the electrode holder for burning and the electrode plate can be rotated 360 ° by slightly loosening the cap, and tightened again at an arbitrary angle. This makes it possible to set, and the working posture as the scorch torch can be easily changed without using a tool.

On the other hand, TIG welding and scoring T
The IG welding power source can be set to TI
G welding and scorching can be easily switched, and the presence / absence of a pulse can be selected regardless of welding work or scoring work by another pulse selection switch.

Further, by using the gas pressure sensor disposed in the inert gas circuit, when the torch is set for the burning operation, the changeover switch is set to T.
If the IG welding side is set incorrectly, the interlock is applied so that no voltage is generated on the secondary output side, so that high voltage is not generated on the burn-off electrode holder or the electrode plate, resulting in a safety aspect. Demonstrates outstanding effects.

Further, in addition to a convenient function of a self-holding function, a work with a pulse can be selected in the burning operation, so that the operation speed is higher than that of a conventional model in which only a burning operation without a pulse can be performed. Has the dual advantage of being faster and using less power.

[Brief description of the drawings]

FIG. 1 is a TIG for both TIG welding and scorching according to the present invention.
It is a whole block diagram of a welding device.

FIG. 2 is a perspective view of the torch in a TIG welding set state in the torch for both TIG welding and scorching according to the present invention.

FIG. 3 is a perspective view of the torch of the combined torch for TIG welding and scorching according to the present invention in a scoring set state.

FIG. 4 is an exploded perspective view showing a main part of a torch for both TIG welding and scorching according to the present invention for explaining a function changeover state for both TIG welding and scorching.

FIG. 5 is an overall configuration diagram of an apparatus capable of functioning as both TIG welding and scorching as seen in a conventional example.

FIG. 6 is a perspective view of a scorch torch as seen in a conventional example.

FIG. 7 is a perspective view schematically showing a TIG welding and burn-out state in a stainless steel plate joint.

Continued on the front page (51) Int.Cl. ⁶ Identification code FI B23K 9/29 B23K 9/29 B 31/00 31/00 G

Claims (4)

[Claims] 1. A T for welding an object to be welded such as stainless steel.
In the IG welding apparatus, the part at the tip of the TIG welding torch is replaced with a burning electrode holder, and the welding power supply changeover switch in the welding apparatus is set to TI.
By switching from the G side to the burn-off side, T
From IG welding, it is possible to electrochemically clean the discolored part by welding of the surface of the workpiece such as stainless steel.
In the IG welding and scorching combined TIG welding device, by disposing a gas pressure sensor in the inert gas circuit of the welding power supply unit and replacing the tip of the TIG welding torch from TIG welding to scoring, At the tip of the torch, gas is not released, pressure is applied to the gas circuit, and by the gas pressure sensor, in combination with the changeover switch of the welding power supply unit, the changeover switch is set to the burnout side at the time of burnout work. TIG welding and scoring combined TIG welding equipment characterized in that it has an interlock function so that work can be performed only when it is in operation, and that safety is taken into consideration so that high voltage is not generated on the electrode plate for scorching. . 2. A power supply voltage of 100 V by using a DC power supply as a welding power supply part and automatically switching an input voltage inside the power supply in a TIG welding apparatus for both TIG welding and scorching.
・ A dual-purpose machine of 200V, with or without pulse during TIG welding and scoring work, and has a self-holding function so that work can be performed even when the torch switch is OFF during welding or scoring. 2. A TIG for both TIG welding and scorching according to claim 1.
IG welding equipment. 3. A TIG welding torch having a flexible copper wire and an inert gas hose connected at one end, a collet body mounted at the other end, and a collet and a non-consumable electrode inserted therein. In addition, by replacing the non-consumable electrode with a burnout electrode holder, an electrode plate and a mop, it has become possible to electrochemically clean the discolored portion due to welding of the surface of the workpiece such as stainless steel. Characteristic TIG welding and scorching torch. 4. The both ends can be fixed by screwing a cap with a screw portion inside the torch body by making the screw of the burn-off electrode holder longer than the screw of the collet body. The TIG according to claim 3, wherein the angle can be arbitrarily changed by 360 °.
A torch for both welding and scorching.