JPH0333434B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a welding wire charge in which welding wire is stacked and stored in a loop shape in a pail pack, and in particular, it is used to prevent the transfer of welding wire from one pail pack to another during welding. This invention relates to a welding wire charge made possible.

If the amount of welding wire is small, it is wound around a bobbin, or if it is a large amount, it is stored in a pail pack. The pail pack is a cylindrical body made of metal or cardboard with a bottom. When in use, the lid is removed, a conical wire is taken out and fitted, and the welding wire is pulled out through the device and used for welding.

FIG. 1 is a diagram showing the state of use of welding wire housed in a generally implemented pail pack. 1 is a welding pail pack with outer cylinder 2 and inner cylinder 3.
A loop 4 of welding wire W is inserted between them.
to store. In order to prevent the wire W from twisting when pulled out, the wire W is twisted approximately 360° per turn in the opposite direction to the twist that occurs when being pulled out, forming the loop 4. Therefore, the wire W in the loop 4 is always twisted. The loop 4 is about to expand, and a restraining plate 5 is placed on top of the loop 4 to suppress this expansion. Note that this force to expand acts not only upward but also radially outward, so the loop 4 extends toward the outer cylinder 2 and creates a gap between it and the inner cylinder 3 as shown in the figure. , the inner cylinder 3 may be omitted. Reference numeral 6 denotes a wire take-out device, which has a conical shape and is attached to the upper open end of the outer cylinder 2 by a fastening band 7. At the time of shipment from the factory, there is a disc-shaped lid (not shown) on the top of the outer cylinder 2. This lid is removed at the welding site, and the wire W is removed from the inside.
is pulled out, the wire is inserted through the wire guide hole and the conduit tube 8, etc. at the top of the wire take-out device 6, and then the wire take-out device 6 is attached to the upper part of the outer cylinder as shown.

Although not shown, a wire feeder torch or the like is provided at the tip of the conduit tube 8, and the wire W
is supplied to the welding section through these. As the welding progresses, the wire W in the pail pack 1 is successively pulled out from the upper part of the loop 4 and gradually decreases, and the holding plate 5 moves down. In the figure, reference numeral 9 denotes a ring provided at the upper end of the inner cylinder to prevent wires from tangling, and is used as necessary.

Conventionally, when using such a wire for welding within a pail pack, there has been a drawback when the wire in one pail pack is used up and replaced with a new pail pack. In other words, it is difficult to check the amount of welding wire remaining in the pail pack and estimate when to replace it with a new pail pack, and the pail pack becomes empty only when the welding wire in the pail pack runs out and the arc stops. However, in recent years, welding work has become increasingly automated, and welding robots, etc., are performing fully automatic and unmanned welding. If the welding work is interrupted because the wire runs out, it takes time to replace the pale pack, pass the welding wire through the conduit tube and torch, and restart the arc, which is undesirable as it reduces work efficiency. . Further, it is not preferable to interrupt and restart welding midway in order to obtain a good welded part.

The present invention solves the above-mentioned problems when replacing the pail pack in the prior art, and aims to provide a welding wire charge that allows the replacement of old and new pail packs during welding without interrupting the welding operation. , the gist of which is a welding wire charge in which welding wires are stacked in a loop in a pail pack, and an annular restraining member is placed on the upper end of the loop, and the stacked welding wires are The terminal end of the welding wire is guided upward along the body of the pail pack, taken out from inside the holding member and attached to the upper part of the pail pack, and the starting end of the welding wire is taken out from inside the holding member.

When using welding wire in a pail pack, a large amount of welding is to be performed, and in this case a large amount of welding wire is used, and it is important to increase welding efficiency, and for that purpose the wire in the pail pack is used up. It is advisable to start feeding wire from a new pail pack immediately. In order to transfer welding wire continuously from one pail pack to another, it is sufficient to weld and join the final end of the wire in the currently used pail pack to the starting end of the wire in a new pail pack. Since the final end is located at the lower end of the stacked wire loops, that is, at the bottom of the pail pack, it cannot be pulled out for joining, and conventionally it has been impossible to continuously transfer the welding wire from one pail pack to another. The present inventors studied the loading state of the welding wire in the pail pack, that is, the treatment of the wire end, in order to enable continuous transfer of the welding wire between the pail packs, and
The present invention has been completed, and by loading the welding wire as described above, it is possible to smoothly and continuously transfer the welding wire between the pail packs.

The present invention will be described below based on the specific examples shown in the drawings, but the following specific examples are not intended to limit the present invention, and various specific examples can be considered as appropriate without departing from the gist of the present invention.

FIG. 2a shows a sectional view of a welding wire charge according to the present invention, and FIG. 2b shows a sectional view taken along line A-A' in a. As shown in the figure, the pale pack 1 has an outer cylinder 2 which is its body and a bottom plate part 11 of the outer cylinder 2 whose lower end is the outer body.
The welding wire is provided with an inner cylinder 3 fixed to the inner cylinder 3, which are arranged coaxially, and a welding wire is wound into a loop in the space between the inner and outer cylinders and stored in a stacked manner. Reference numeral 4 indicates a loop-shaped stack of welding wires, and an annular restraining member 5 is placed on the upper end of the loop 4. The upper end of the outer cylinder 2, which is the bottomed body of the pale pack, is the lid 1.
0 is closed, and the mating portions of these members 2 and 10 are connected by a tightening band 7. Although not shown, an elastic member such as a sponge is provided between the restraining member 5 and the lid 10 at the time of shipment from the factory in order to prevent the stacked state of the wires from collapsing during transportation.

The welding wire is twisted within the elastic limit of the wire, for example, approximately 360 degrees per turn, in order to prevent the weld bead from meandering during welding, and is stacked and stored in a loop in the pail pack. As shown in the figure, the wire loop-shaped laminate 4 has its outer periphery in contact with the inner wall of the outer cylinder 2 of the pail pack, and its inner periphery and inner cylinder 3 are in contact with each other.
There is a gap between the outer walls. In the present invention, the terminal end portion 12 of the welding wire laminated within this pale pack is
The outer cylinder 2 is spirally connected from the lower end of the loop-shaped laminate 4.
It is guided upward along the inner wall of the loop-shaped laminate, passed between the upper end of the loop-shaped laminate and the bottom of the annular holding member 5 placed on the upper end, taken out from the inside of the holding member, and further spirally shaped into the inner wall of the outer cylinder 2. The final end is fixed to the table 13.

If the wire is arranged in a spiral shape on the inner wall of the outer cylinder, the terminal end of the wire will not be plastically deformed. Particularly in the holding member portion, the welding wire is sandwiched between the holding member 5 and the loop-shaped laminate 4, so it is easily bent, but if it is formed into a spiral shape as described above, no problems such as bending will occur. Since the terminal end of the wire above the holding member is pulled out when welding and joining the terminal end of the next pail pack, it is best to provide a margin of 2 loops in the illustrated example. However, when a certain amount of the welding wire in a pail pack is used and it is to be joined to the starting end of the wire in the next pail pack, there is enough room at the end of the wire, so there is no need to be particularly aware of the amount of the end of the wire beyond the holding member.

Note that there are no particular limitations on how to fasten the starting end 14 of the wire, but for example, the wire may be inserted and bent into a hole provided in the upper part of the inner cylinder 3 and fastened. The effects of the welding wire charge stacked and stored in the pail pack in this manner will be explained with reference to FIG. 3, which shows the usage state of the charge.

Figure 3 shows a state in which the welding wire in the currently used pail pack (hereinafter referred to as the old pack) 1' is used up during welding, and the welding wire is about to be replaced with a new pail pack (hereinafter referred to as the new pack) 1''. As shown in the figure, the final end of the wire in the old pack 1' and the starting end of the wire in the new pack 1'' are joined by butt welding, and the wire portion near the joint is attached to a clamp attached to the upper end of the outer cylinder of the old pack 1'. The wire is sandwiched between the members 15 to restrict the degree of freedom of the wire when it is transferred from the old pack to the new pack, and to prevent problems such as kink lines caused by twisting the wire. The clamping part of this clamping member is formed in a U shape, and clamps the wire via a sponge inside the clamping part. Note that it is preferable to restrict the movement of the wire during normal times, and adjust the clamping pressure by adjusting the thickness of the sponge, etc. so that the wire can be easily released when the wire is fed into the conduit tube 8. The wire introduction hole of the conduit tube 8 is attached to the indicator plate 16, and the support plate 16
can be moved freely onto a rail 17 provided above both the old and new packs by means of rollers (indicated by dotted lines) on its back.

When the welding wire W taken out from the old pack in such a state is used up, the welding wire W left behind the restraining member at the bottom of the pale pack is rotated to the upper conduit tube 8.
is pulled up into the introduction hole. In this way, the welding wires laminated in the old pack are used up, and finally the terminal ends of the wires arranged in a spiral on the inner wall of the outer cylinder 2 are taken out from the pail pack. Next, the welding wire is released from the holding member 15 and the welding wire is removed from the new pack. The wire introduction hole of the conduit tube is attached to a movable indicator member on the rail 17, so it is in the optimal position according to the condition of the wire being pulled up.
Automatically move upwards. In addition to the above-mentioned clamping method, means for controlling the degree of freedom of the wire when transferring the wire from the old pack to the new pack include adsorption with a magnet, or insertion of the wire into a perforated cone 18 (shown by dotted line) such as an insulator. Various methods can be considered. In any case, the welding wire is twisted, so when the wire is free to some extent during wire transfer, it tends to twist in the opposite direction in an attempt to eliminate the twist, making it easy for tangles to occur.
Restricting the degree of freedom of the wire is a significant measure to achieve smooth wire transition. In addition to the above-mentioned rail method, the means for moving the wire introduction hole of the conduit tube 8 may be a method in which the end of the conduit tube is attached to the tip of an arm rotatably provided on a support. The above specific example is an example in which the present invention is applied to a load in which a loop body of welding wire is housed between the inner cylinder and the outer cylinder of a pail pack with a double cylindrical structure. It is known from Japanese Utility Model Application No. 58-71476 that a large-capacity load containing a loop of welding wire is housed in the gap and inside the inner cylinder. A large-capacity load containing a loop of welding wire also inside this inner cylinder is a normal pail pack as shown in Fig. 1, and another pail pack whose outer cylinder is the inner cylinder of this pack is housed. Therefore, in order to apply the present invention to this large-capacity load, as shown in FIG. The wire end portion 12b of the loop body 42 accommodated between the wires 21 and 21 may be arranged as shown in FIG.
When taking out the wire, the wire final end 12a of the loop body 41 inside the inner cylinder 31 and the wire starting end 14b of the loop body 42 between the inner and outer cylinders are joined, and the wire final end 12b of the loop body 42 between the inner and outer cylinders is connected to the other end. All you have to do is join the starting end of the wire of the new pail pack. Of course, the wire final end 12a of the loop body 41 inside the inner cylinder 31 and the wire starting end 14b of the loop body 42 between the inner and outer cylinders should be joined at the time of manufacturing the welding wire loading section (when loading the wire). is also possible.

In this way, by using the welding wire charge of the present invention, you can simply weld and join the final end of the welding wire in the currently used pail pack to the starting end of the wire in a new pail pack, allowing you to connect the old and new wires without interrupting welding. Exchanges can be made. In this regard, with the conventional technology, in the worst case scenario, the wire passes through the feeding device and cannot be fed, welding stops, and the wire breaks. Therefore, a new pail pack is ordered, the wire is pulled out from it, and the wire It is extremely troublesome to pass it through a feeding device, a welding torch, etc., and if it is an automatic welding device, it has to be reset to start welding. Furthermore, even if the welding wire is replaced with a new pail pack before it is used up, interruption of welding cannot be avoided.

As explained above, according to the present invention, the pail pack can be replaced automatically without interrupting the welding operation, so that it is possible to greatly reduce the hindrance to the welding operation, and its usefulness is extremely large.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the usage state of the welding wire stored in the pail pack, Fig. 2a is a diagram showing a cross-sectional view of the welding wire charge of the present invention, and Fig. 2b is a diagram showing the A-A of a. Fig. 3 is a diagram showing the state in which the load of the present invention is used, and Fig. 4 shows an embodiment in which the present invention is applied to a pail pack in which a loop body of welding wire is also accommodated inside the inner cylinder. FIG. DESCRIPTION OF SYMBOLS 1... Pail pack, 2... Body part, 4... Loop-shaped laminate, 5... Holding member, 8... Conduit tube, 12... Wire terminal part, W... Welding wire.

Claims (1)

[Claims] 1 A welding wire charge in which welding wire is stacked in a loop shape in a pail pack, and an annular restraining member is placed on the upper end of the loop, and the terminal end of the stacked welding wire is inserted into the pail pack body. The welding wire charge is characterized in that the welding wire is guided upward along the section, taken out from the inside of the holding member and attached to the upper part of the pail pack, and the starting end of the welding wire is taken out from the inside of the holding member.