JPH0481279A - Welding wire feeder - Google Patents

Abstract

PURPOSE:To always supply a welding wire to the accurate position without exchanging the wire nozzles each time by providing plural wire nozzles conforming to each wire diameter according to a kind of the welding wire diameter and operating a wire nozzle selecting device. CONSTITUTION:The plural wire nozzles 3A and 3B having the different inside diameters mutually corresponding to the welding wire 4 diameter are provided. In a state with the wire nozzle 3A selected, the welding wire 4 sent out from a spool 5A by a wire sending-out device 6A is led by the wire nozzle 3A via a wire feed tube 11 and supplied to a beam spot from the welding torch 2. When a command to the effect that materials 1 to be welded of a next stage are changed is inputted, the wire nozzle selecting device 12 is operated. A table 16A for ascending and descending is first raised and a table 13 for changing over is moved crosswise up to the position where the wire nozzle 3B can be selected and then, the table 16A for ascending and descending is lowered up to the specified position. In this state, a wire sending-out device 6B is operated to send out the welding wire 4 from a spool 5B. The welding wire 4 is led by the wire nozzle 3B via the wire feed tube 11 and supplied to the beam spot from the welding torch 2.

Description

[Detailed Description of the Invention] [Field of Industrial Application] H1) The present invention relates to a welding wire feeding device that supplies the welding wire to a welding part in a laser beam welding machine that performs butt welding, for example. .

[Conventional technology]

Generally, when the material, plate thickness, etc. of the materials to be welded are different, the optimal welding wire is selected in accordance with each of the welding conditions as well as other welding conditions. Therefore, when there are multiple types of materials to be welded, in order to improve the efficiency of welding work, multiple types of welding wires that are suitable for each type are prepared at the same time, and the welding wire is fed according to the type of the welded materials. Welding wire feeding devices that can automatically switch wires are often used.

FIG. 4 is a block diagram showing a conventional welding wire feeding device of this kind disclosed, for example, in Japanese Utility Model Application Publication No. 174779/1983. In the figure, (1) is the workpiece to be butt welded at the welding part (1a), (2) is the welding torch using a laser beam, and (3) is the welding wire (4) inserted through it to the welding part (1a). Leading wire nozzle, (58) (5B) is the spool on which the welding wire (4) is wound, (6Δ)
(6B) is a wire feeder that sends out the welding wire (4) wound on the spool (5A) (5B) with a pinch roller, (7) is a wire switching device, and a fixed block (8),
The movable block (9) and the cylinder 00 for driving the movable block (9) are generally configured. (11) is wire feeder (6A) (6B) and fixed block (8)
and between the wire nozzle (3) and the movable block (9)
This is a wire feeding duplex for stably feeding the welding wire (4) between the welding wire (4) and the welding wire (4).

Next, the operation will be explained. This device has two types of welding wires (4) on spools (5A) and (5B), respectively.
It is wound on the wire feeder (6A) or (6B
) is sent out. The wire switching device shown in the figure (the force is switched to the spool (5B) side,
The welding wire (4) from B) passes through the wire feeder (6B), passes through the through holes of the fixed block (8) and the movable block (9), and reaches the wire nozzle (3). The wire nozzle (3) is installed in such a way that its central axis coincides with the welding part (la) at a predetermined position (where the beam spots 1~ from the welding torch (2) are irradiated).
The posture is adjusted, and the welding wire (4) moves from its tip to the welding part (la) along the central axis of the wire nozzle (3).
It is continuously guided towards.

When switching the welding wire (4), first, reverse the wire feeder (6B) and pull the tip of the welding wire (6B) back to the fixed block (8).
) to move the movable block (9) to the left. Next, operate the wire feeder (6A) to
The welding wire from A) is sent out] and is supplied to the welding part (la) from the wire nozzle (3) via the wire switching device (71).

[Problem to be solved by the invention]

As described above, the conventional welding wire feeding device is equipped with different types of welding wire (4) on the spools (5A) and (5B), so the welding wire (4) can be adjusted according to the type of material to be welded. However, since the wire nozzle (3) that ultimately guides the welding wire (4) to the welding area (la) is shared, the following problems arise.

That is, the welding wire (4) has a material (7) depending on its type.
I) Not only that, but the wire diameter may also differ. Therefore, the inner diameter of the wire nozzle (3) is selected to a value that allows the welding wire (4) having the largest wire diameter to be inserted therethrough.

As a result, if the diameters of the welding wire (4) and wire nozzle (3) do not match depending on the combination, for example, a wire nozzle (3) with an inner diameter of 1.2 mm may have a wire diameter of 0.9 mm.
A case may occur in which a welding wire (4) is inserted through the welding wire (4). In this case, welding wire (4) and wire nozzle (3)
Since the centers of the welding wires do not match, the welding wire
- Since the beam spot from (2) will not be accurately supplied, good welding quality will not be obtained. In this case, if you try to maintain welding quality, welding wire (4
] Every time the wire diameter changes, it is necessary to replace the wire nozzle (3) with one that matches the wire diameter, which makes the work extremely complicated.

This invention was made to solve the above-mentioned problems, and it provides a welding wire that can always be fed to an accurate position without having to replace the wire nozzle each time, even if the wire diameter of the welding wire differs. The purpose is to obtain a feeding device.

[Means to solve the problem]

A welding wire feeding device according to the present invention includes a plurality of wire nozzles having mutually different inner diameters, a wire feeder and a spool for feeding welding wire to each of these wire nozzles, and further comprises The apparatus is equipped with a wire nozzle selection device that arbitrarily selects one wire nozzle for guiding the welding wire to be inserted into the welding part from among the plurality of wire nozzles by adjusting the mounting position or attitude of the nozzle.

[For production]

In this invention, a plurality of wire nozzles matching each wire diameter are provided depending on the type of wire diameter of the welding wire, and for example, a wire nozzle selection device operates based on a welding wire selection command signal to select a wire nozzle that is commanded. Adjust to the normal position and posture.

〔Example〕

FIG. 1 is a configuration diagram showing a welding wire feeding device according to an embodiment of the present invention. What is different from the conventional method is the welding wire (4
) and a wire nozzle selection device (12) for arbitrarily selecting one of the two wire nozzles (3A) and (3B) having different inner diameters corresponding to the wire diameters of the wire nozzles (3A) and (3B).
Hereinafter, this change will be mainly explained, including FIG. 2, which shows the details of the wire nozzle selection device (12).

(13) is a switching table configured to be movable along a guide (14), and is operated by a cylinder (15). (+6A) (16B) is the switching table (1
3) is an elevating table that is configured to be able to raise and lower the wire nozzles (38) and (3B), respectively.

In addition, both wire nozzles (3Δ) (311 installation interval S
The lifting distance V is set to a value as small as possible within a range where when one of the wire nozzles is selected to perform welding, the other wire nozzle does not interfere with the work.

In addition, as shown in Figure 3, the inner diameter of each wire nozzle (3) is set to a size that matches the wire diameter as much as possible within the range that allows insertion of the welding wire (), and the wire nozzle (3) and welding The center is always aligned with the wire (4).

Next, the operation will be explained. Figures 1 and 2 show the wire nozzle (3A) selected and the wire feeder (
The welding wire (4) fed out from the spool (5A) by the wire feeding tube (11) is guided by the wire nozzle (3A) and supplied to the beam spot from the welding torch (2). Of course, this wire nozzle (3Δ) has an inner diameter that matches the wire diameter of the welding wire (2) that is inserted through it, so the welding wire (4)
will be supplied to the beam spot with extremely precise positional accuracy.

Here, when a command is input to change the material to be welded (1) for the next process, the wire nozzle selection device (
12) works. That is, first, the lifting table <16
A) rises, and then the switching table (13) moves laterally to the position where the wire nozzle (3B) can be selected.
The lifting table (16B) is lowered to a predetermined position. In this state, operate the wire feeder (6B) to
Send out the welding wire (4) from B).

The welding wire (') is guided by the wire nozzle (3B) through the wire feed tube (11) and supplied to the beam spot of the welding torch (2).In this case, the wire nozzle (3B) The welding wire (4) has an inner diameter that matches the wire diameter of the welding wire (4).
] will be supplied to the beam spot with sufficient accuracy.

In the above embodiment, the welding wire (4) has two types of wire diameters and two wire nozzles, etc. are provided. However, if the welding wire (4) has two or more wire diameters, If this happens, the number of wire nozzles etc. can be increased accordingly.

In addition, a switching table (13) and a lifting table (+
6A) and the like is not limited to cylinder operation, but may also be driven by a combination of an electric motor and a screw mechanism, for example.

〔Effect of the invention〕

Since the present invention is configured as described above, a welding wire of a desired wire diameter is automatically selected depending on the type of material to be welded, etc., and the welding wire is guided to the welding part with sufficient positional accuracy. be able to.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing a welding wire feeding device according to an embodiment of the present invention, Fig. 2 is a block diagram showing details of the wire nozzle selection device, and Fig. 3 is a sectional view of the wire nozzle. 4
The figure is a configuration diagram showing a conventional welding wire feeding device. In the figure, (1a) is the welded part, (31 (3A) (3
B) is a wire nozzle, (4) is a welding wire, (5A)
(5B> is the spool, (68), (6B) is the wire feeder, and (12) is the wire nozzle selection device. The same reference numerals in each figure indicate the same or corresponding parts. Agent: Patent Attorney Oiwa MasuoFigure 1Figure 4 1rjEtfL/') 1O

Claims (1)

[Claims] A spool capable of winding welding wire, a wire feeder that feeds out the welding wire wound around the spool, and a wire nozzle that guides the welding wire fed from the wire feeder to a welding area. a plurality of wire nozzles having mutually different inner diameters, and the wire feeder and spool for supplying welding wire to each of these wire nozzles; A welding wire feeding device comprising a wire nozzle selection device that arbitrarily selects one wire nozzle from among the plurality of wire nozzles to guide the welding wire to be inserted into the welding part by adjusting the welding wire. .