JPH07112276A - Method and device for feeding welding filler metal and consumable electrode - Google Patents

Abstract

PURPOSE:To surely prevent filler positional deviation of welding filler metal or the consumable electrode and to stabilize the welding quality. CONSTITUTION:In welding base metals 1 while the filler metal 8 is fed to a weld zone 2, beltlike filler metal 8' wound round a filler metal reel 7 is used to feed by changing the cross-sectional shape by forming rollers 10a and 10b which also serve as feed rollers just before a feed nozzle 9, by which rigidity of the filler metal 8 is improved and rectilinial directivity is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding filler material, a method for feeding consumable electrodes, and an apparatus therefor.

[0002]

2. Description of the Related Art When a welding filler metal or a consumable electrode is fed to a welded portion, if a position shift relative to the welding target position, that is, a welding position shift occurs, a welding defect such as defective fusion or a weld metal It causes unevenness and seriously affects the quality of the weld. Therefore, there is a need for a feeding method in which some measure is taken in order to prevent the displacement of the welding position of the welding material or the consumable electrode. Conventionally, as a method of feeding the filler material or the consumable electrode while preventing the displacement of the filler metal position, as shown in the perspective view of FIG. 3, a filler material or a consumable electrode called a wire having a circular cross section is used. Then, by applying pressure with several pressure rollers whose magnitude of pressure can be adjusted, the winding curl of the wire generated when winding on the reel is removed, straightened and sent to the welding part. There is a method of feeding by feeding the filler material or the consumable electrode while preventing the filler position displacement.

That is, in FIG. 3, the welded portion 2 of the base material 1
The non-consumable electrode 4 protrudes from the tip of the welding torch 3 facing the welding torch 3 and the welding cable 5 is provided at the rear end of the non-consumable electrode 4.
A welding power source 6 is connected through the welding source 2, and a welding material 8 wound around a welding material reel 7 from the front is fed to the welding portion 2 via a feeding nozzle 9. In addition, two feeding rollers 12 and 3 are provided between the feeding nozzle 9 and the filler reel 7.
A pair of pressure rollers 13 are provided, and a horizontal direction control motor 14 and a vertical direction control motor 15 which are connected to a feeding nozzle remote control panel 16 are connected to the feeding nozzle 9.

However, when welding the filler material 8 while feeding it with such a device, the welder feeds the filler material 8 by an inching operation for several tens of centimeters before starting welding, and pressurizes the welding roller. The direction and magnitude of the pressing force is adjusted by 13, and the curling of the filler material 8 that occurs when the filler material 8 is wound on the filler material reel 7 is removed by this pressure, and the filler material 8 is straightened and melted. By welding the filler material 8 to the welded portion 2, the filler material 8 is prevented from being displaced in the filler position and is fed. In this case, if the direction and size of the curl of the filler material 8 are constant. The pressure roller 13 adjusted at the beginning may always be used, but the actual winding behavior of the filler material 8 depends on the stress generated when the filler material 8 is wound on the filler material reel 7. The size depends on the position of the filler material reel 7 and the winding diameter. Not a different constant. Therefore, this method has a drawback that the pressure roller 13 must be adjusted many times to remove the curl of the filler material 8. Further, during the actual welding process, the pressure roller 13 is hardly readjusted, and the welder changes the position of the feed nozzle 9 remotely when the welding position of the filler material 8 changes during monitoring. It is sequentially adjusted in the vertical and horizontal directions by the board 16 and returned to the proper welding position, and this adjustment is one of the main tasks of the welder because it needs to be performed over the entire period during welding. Therefore, in the conventional method of preventing the displacement of the welding position of the filler material 8, there are problems such as the precision of displacement prevention and the durability of displacement prevention.

[0005]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above circumstances, and it is possible to reliably prevent the displacement of the welding position of the welding filler metal or the consumable electrode and to stabilize the welding quality. It is an object of the present invention to provide a welding filler material, a method for feeding consumable electrodes, and a device therefor which can be realized.

[0006]

To this end, the present invention provides a welding method in which a welding filler metal or a consumable electrode is welded while being fed to a welded portion, and a belt-shaped filler material or a consumable electrode is used immediately before the welding. In a device for changing the cross-sectional shape for feeding, and for feeding a belt-shaped filler material or consumable electrode wound on a reel to a welding portion through a feeding nozzle, the belt-like shape is provided immediately before the feeding nozzle. And a forming and feeding roller for changing the cross-sectional shape of the filler material or the consumable electrode for feeding.

[0007]

In the welding filler material and consumable electrode feeding method of the present invention, when welding is performed while the filler material or the consumable electrode is being welded to the welded portion, the belt-shaped filler material or the consumable electrode is welded. By changing the cross-sectional shape immediately before, the cross-section coefficient increases and the rigidity improves, which gives the filler material or the electrode a linear directivity, and the displacement of the welding position due to the curl is caused. It can be surely prevented, the quality of welding can be stabilized, and the work of the welder can be reduced.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A welding filler material, a method for feeding consumable electrodes and an apparatus therefor according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an overall perspective view of the feeding device, and FIG. It is an expansion perspective view. In the above figure, the non-consumable electrode 4 protruding from the tip of the welding torch 3 faces the welded portion 2 of the base material 1 to be flat-plate butt-welded, and the welding cable 5 is provided at the rear end of the non-consumable electrode 4. Welding power source 6 is connected,
Further, a band-shaped filler material 8 ′ wound around the filler material reel 7 is fed to the welded portion 2 from the front via a feed nozzle 9.
In front of the feeding nozzle 9, a pair of forming and feeding rollers 10a, 10b for changing the cross-sectional shape of the band-shaped filler material 8'and feeding it as the filler material 8 are provided. The forming / feeding roller 10a is provided with a forming ridge 11a, and the other forming / feeding roller 10b is provided with a forming groove 11b that fits with the forming ridge 11a.

In such an apparatus, the filler material reel 7
The strip-shaped filler material 8'rolled around the pair of forming / feeding rollers 10a, 1
By passing 0b, the cross-sectional shape is transformed into a semi-arc shape and becomes the filler material 8, the cross-section coefficient increases and the rigidity improves,
As a result, the filler material 8 is welded in a state where the linear directivity is given, so that the displacement of the filler position due to the curl can be prevented. Therefore, in this way, the filler material 8 is welded to the weld 2
By preventing the displacement of the welding position by feeding to the welding machine, it is possible to eliminate the monitoring work required for automatic welding, contribute to cost reduction, and stabilize welding quality. When this method is applied to GTA welding, the width of the band-shaped filler metal 8'is about 2 to 5 mm and the thickness is 0.1 to 0.3 so that melting by an arc is possible in a state where the cross section is deformed.
mm is suitable. When applied to electroslag welding, electron beam welding, laser welding, etc., the width and thickness are changed according to the shape and size of the heat source.

[0010]

In summary, according to the present invention, in a welding method in which a welding filler metal or a consumable electrode is fed while being fed to a welding portion, a band-shaped filler material or a consumable electrode is used to change the cross-sectional shape immediately before the welding. In a device for changing and feeding, and for feeding a band-shaped filler material or consumable electrode wound on a reel to a welding portion through a feed nozzle, the belt-shaped filler metal immediately before the feed nozzle. By arranging a forming and feeding roller that feeds by changing the cross-sectional shape of the material or consumable electrode, it is possible to reliably prevent displacement of the welding position of the welding filler material or consumable electrode,
INDUSTRIAL APPLICABILITY The present invention is extremely useful industrially because a welding filler material, a method of feeding a consumable electrode and a device therefor capable of stabilizing the welding quality can be obtained.

[Brief description of drawings]

FIG. 1 is an overall perspective view of an embodiment of a welding filler material and a consumable electrode feeder according to the present invention.

FIG. 2 is an enlarged perspective view of a main part of the above.

FIG. 3 is a perspective view of a conventional feeding device.

[Explanation of symbols]

 1 Base material 2 Welding part 3 Welding torch 4 Non-consumable electrode 5 Welding cable 6 Welding power source 7 Filler material reel 8 Filler material 8'Strip-shaped filler material 9 Feed nozzle 10a, 10b Forming / feeding roller 11a Forming convex ridge 11b Molded groove

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[Procedure amendment]

[Submission date] December 20, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 2

[Correction method] Change

[Correction content]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

In such an apparatus, the filler material reel 7
The strip-shaped filler material 8'rolled around the pair of forming / feeding rollers 10a, 1
By passing 0b, the cross-sectional shape is arcuate (V-shaped, U-shaped)
The shape of the filler metal 8 is transformed into the filler metal 8, the section modulus is increased and the rigidity is improved. As a result, the filler metal 8 is welded in the state where the linear directivity is given. It is possible to prevent the displacement of the welding position due to. Therefore, by feeding the filler material 8 to the welded portion 2 in this way to prevent the welding position displacement, the monitoring work required during automatic welding becomes unnecessary, which contributes to cost reduction and stable welding quality. Can be realized. When this method is applied to GTA welding, the width of the band-shaped filler material 8'is about 2 to 5 mm and the thickness is 0.1 to about 200 mm so that the melting can be performed by an arc in a state where the cross section is deformed. About 0.3 mm is suitable. When applied to electroslag welding, electron beam welding, laser welding, etc., the width and thickness are changed according to the shape and size of the heat source.

Claims (2)

[Claims] 1. A welding method in which a welding filler metal or a consumable electrode is welded while being fed to a welded portion, and a belt-shaped filler material or a consumable electrode is used to change the cross-sectional shape immediately before the welding and feed the filler. Welding filler material and method for feeding consumable electrodes. 2. A device for feeding a strip-shaped filler material or a consumable electrode wound on a reel to a welding portion via a feed nozzle, wherein the strip-shaped filler material or a consumable electrode is provided immediately before the feed nozzle. A method for feeding a welding filler metal and a consumable electrode, characterized in that a forming / feeding roller for changing the cross-sectional shape of the feeding is provided.