JPS6044183A - Packed wire for welding - Google Patents

Abstract

PURPOSE:To eliminate troubles in feeding such as entanglement, kink, etc. of a wire during drawing out of the wire from a pail pack by specifying the difference in the circumferential length of optional adjacent wire loops. CONSTITUTION:The difference in the circumferential lengths of optional adjacent wire loops is made <=45mm. with a welding wire loaded into a pail pack 1 after twisting the wire. A retaining member 6 is placed on the wire laminate W. Simultaneous pop-out of several loops from the inside of the member 6 is thus eliminated in the stage of using the wire W' in the pail pack by taking the wire out of said pack and the entanglement and kink owing to such pop-out are obviated. The circumferential length of the wire loop refers to the length of the loop from the intersected point (a) of the line D connecting the center C of the pack 2 and the outermost circumferential point (d) of a wire loop L up to the intersected point (b).

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a load of welding wire that is twisted and stored in layers in a pail pack.

(Prior Art) In automatic and semi-automatic welding, large-capacity welding wire storage containers are used for the purpose of improving efficiency, and a typical example is a pail pack. This stores a large amount of wire in a bag, and feeds the wire to the welding torch using a take-out device or a feeder. Fully automatic welding has recently become very popular, and highly accurate construction conditions are desired. Therefore, a twisting hole (approximately 360° twisting is inserted in each loop) can eliminate weld bead meandering and arc instability caused by reversing the wire tip.
Pail packs loaded with wire have come into use. However, when it comes to loose wires, for example, a wire with a twist of ~360 degrees exerts a restoring force due to the stress of the twist, and a force that tries to spread toward the outer periphery inside the bag is always working, and when the wire is freed, it falls to the top of the pail pack. Because the wire has a tendency to jump up, feeding troubles such as tangles and tangles occur when the wire is drawn out. For this reason, methods such as placing a rigid annular restraining member on top of the wire stack stored in a pail pack and pressing down the wires from above have been used. It is difficult to prevent the wires from jumping out from inside. Even though the wire loops are regularly eccentric and stacked in a flower pattern, a situation occurs where several loops are pulled out at once instead of being pulled out one by one in a regular manner. When this happens, the pulled out loop becomes free9, and the loop tries to restore itself to its original position due to the torsional stress, inverting it within the pad, causing tangles and tangles, and the wire is fed to the welding torch. It becomes impossible to continue welding work.

(Object of the Invention) The present invention has been made in order to solve the above-mentioned drawbacks of the prior art, and provides a welding method that allows wires to be drawn out smoothly without any feeding troubles such as tangling or tangles when drawing out wires from a pail pack. The purpose of the present invention is to provide a pail pack interior filling for wire for use in the industry.

(Structure of the Invention) The gist of the present invention that achieves this object is to provide a welding wire charge which is made by putting a screw in a pail pack and loading it, in which any adjacent loose wires are removed. The difference in circumference length is 45w or less.

The inventors of the present invention have found that in order to fundamentally eliminate the inconveniences such as tangles and tangles when removing screw-in welding wire from inside the pail pack, it is necessary to improve the storage condition of the wire in the pail pack. Having realized that this is necessary and completed the present invention, by storing welding wires in a stacked manner as described above, it is possible to always smoothly take out the wires.

The present invention will be explained in detail below.

FIG. 1(a) shows a sectional view of a welding wire charge, and C1(b) shows a sectional view taken along the line A-=A' in (,). Further, FIG. 2 is a diagram showing the state in which the charge is used. As shown in the figure, the pale pack l includes an outer cylinder 2 and an inner cylinder 3 whose lower end is fixed to the bottom plate part 4 of the outer cylinder 2 (this inner cylinder 3 is not necessary), and these are arranged concentrically, Welding wire is wound in a loop between the walls between the inner and outer cylinders and is stored in a stacked manner. W indicates a loop-shaped laminate of welding wire, and 5 indicates a lid.

Although not shown, the pail pack is provided with a jig to prevent the loaded state from being distorted during transportation.

Welding wire is given a torsion of approximately 3600 degrees per turn within the elastic limit of the wire in order to prevent the weld bead from meandering during welding, and is stored in a loop shape within a pail pack. ing. As shown in (,), the wires are stored in a stacked state in which the outer periphery of the wire laminate W is in contact with the inner wall of the outer cylinder 2 of the pale pack, and if the wire has an inner cylinder 3, the inner periphery of the laminate W and the inner wall 3 are in contact with each other. There is a gap between the outer walls.

Also, the state of each layer of the laminated wire loop L is (b
), it has a flower pattern shape.

The twisted welding wires stacked and stored in the pail pack are taken out as shown in FIG. 2, as shown in FIG. , a hole at the top of the extraction device R9, and a path of the conduit tube 11 to a welding torch (not shown). A wire feeding mechanism is provided on the welding torch side of the conduit tube 11, and the shear wire W' is taken out by this feeding mechanism.

When using welding wires stacked and stored in a pail pack, it is necessary to always achieve smooth wire removal, but this greatly depends on how the wires are stacked and stored in the pail pack.

As shown in FIG. 1(a) and its cross-sectional view (b), if the wires are stacked in the pail pack in an orderly and uniform manner, the wires can be taken out without becoming tangled. That is, as mentioned above, since the holding member 6 is placed on the wire stack W when taking out the wire, the wire becomes free only when it is pulled out from the upper end of the wire stack W. However, at this time, the loops are pulled out one by one in a regular manner, eliminating the need to pull out several loops that would cause tangles and tangles.

In order to achieve this ideal smooth wire removal, the inducer/cutter 5 has conducted repeated experimental research and has focused on the loop diameter of the stacked wires, that is, the loop circumference length. It was found that this has a severe effect on the quality of ejecting. In other words, if there is variation in the wire circumference length, the outer circumference of the loose wire will not be aligned and there will be loose wire located on the inside of the outer circumference of the normal loose wire.
It becomes easier. In this case, the adjacent wire loops are held down by the holding member and are in the same plane, so when the wire of the large loop is pulled up, the wire of the next small loop is pushed out at the same time, and the two loose wires, large and small, are pulled out. exhibit a condition. This is shown in Figure 3 (a) and (b
) To explain, there are variations in the circumferential length of the loose wire. (a) When the preceding large loop A and the following small loop B are adjacent to each other as shown in the figure, loop B is located inside loop A, Moreover, since it is held down by the holding member and lies in the same plane, when the loop A is pulled out, the loop B is pushed by the loose A and is pulled out at the same time, resulting in several loops being taken out at once. Figure (b) is a three-dimensional diagram showing the positional relationship of the loops, b, x, x' are the outer periphery of the laminate, Y, Y
' is a line indicating the inner circumference.

As a result of experiments, the present inventors found that when the circumferential length of adjacent loose wires is larger than the difference of 45 cm in circumference, it is common for several loose wires to jump out at the same time, causing tangles. After confirming that this occurs, the present invention was completed.

1. What is the circumferential length of loose wire in the present invention? As shown in Fig. 4, the center C of the pail pack 2 and the outermost wire loop L in Fig. 5 are the difference in circumferential length of adjacent wire loops and the number. It is a figure which shows the relationship of the wire jump of a loop.

This uses JIS, YCW-1 wires with wire diameters of 1 and 2φ, and sets the difference in the circumferential length of the matching wire loops to a constant length. There are 7 types of pail packs that can have 20 such sections (
The difference in circumference length is 20.35.45,50°60.70.1
This is the result of investigating the number of times the wire jumps out from the inside of the holding member in several loops when the wire is taken out using the wire take-out device shown in Fig. 2. As is clear from the figure, in the case of a pail pack in which the difference in the circumferential length of adjacent containers (1) was 45 mm or less, the wire did not jump out even once.

(11) If the difference in circumference length between adjacent rings exceeds 45 m,
The wire jumps out every 7 times when taking out too many ears. 4 times/20 times with a pail pack with a difference in circumference of 50 cm.
There were 19 jumps/20 jumps with the 100cm bay pack.

In other words, if the difference in the circumferential length of any matching wire loops of the welding wires stacked and stored in the pail pack is 45 or less, several loops will not be taken out at the same time, and this will cause entanglement and tangles. It turns out that there isn't.

Next, a method for obtaining a welding wire charge according to the present invention will be described. A method of loading wire into a pail pack is to feed the wire into the pack at a constant linear speed, identify the landing point of the loop, and rotate the pack itself at a constant speed to make it eccentric. ), and the method of eccentrically moving the landing point of the loop by fixing the pack (Japanese Patent Application Laid-Open No. 137266/1983).
When we observe the state in which these are stacked and stored, we find that although the loop diameter and eccentric pitch are the same (the feeding speed is kept constant), the loop diameter varies from one to the other. be observed. This shows that even if the wire is fed at a constant speed, the same loop diameter will not necessarily be obtained. Differences in the loop diameters of the wires loaded in this pail pack are the cause of the above-mentioned wire loops popping out, and the differences in the loop diameters are caused by variations in the rigidity of the wires. In other words, if the wire has high stiffness locally, when that part is bent into a loop, it will strongly rebound and tend to become larger in diameter.On the other hand, since the wire is made into a loop at the same feeding speed, the adjacent loop will have a smaller diameter.
This creates a difference in wire loop diameter. Further, even though each loop is eccentrically arranged at a predetermined pitch equal to or larger than the wire diameter, the landing points of the loops are reversed. To explain this again as shown in Figure 3(b), if the stiffness of the large loop is greater than that of other loops and the stiffness is non-uniform, continuous C', B', A, B , the equilibrium of the five loops of wire in C is broken, the diameter of the large loop is small, and the diameters of the matching loops B and B' are small, thus causing contraction and expansion in the loop diameter, that is, looseness. Variations occur in the circumference length.

Since the stiffness of the wire is related to the tensile strength, it is effective to minimize the variation in the tensile strength in order to prevent variations in the circumferential length of the loop. Specifically (r), according to experiments, the maximum wire tensile strength in any scale-matching loop.

It is sufficient that the difference between the minimum values, that is, the range FMR, does not exceed 4.5 kff/2. The tensile strength of wire varies depending on the annealing conditions during wire manufacturing (hatch annealing of bobbin-wound wire in a bell furnace, continuous annealing of horizontally looped wire in a radiant tube heating furnace, etc.). Then these are dogs. Therefore, in order to keep the tensile strength of the wire to the desired value and minimize the variation, pay attention to the annealing temperature, annealing time, wire shape in the furnace, etc., and make sure that the variation in the tensile strength of the wire is 4.5 ktf/- or less. Make a wire of
355 DEG JP-A-57-13726.6, etc.), it is possible to obtain the load of the present invention in which the difference in circumferential length between arbitrary adjacent wire loops is 45 mm or less.

(Effects of the Invention) As is clear from the above description, according to the welding wire load of the present invention, when the welding wire is taken out from the pail pack and used, it is not placed on the wire stack. This eliminates the simultaneous jumping out of several loops from the inside of the holding member.
Tangle and tangle caused by this can be eliminated. Therefore, the load of the present invention has much better wire removal performance than conventional pail packs, and has great industrial value.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a welding wire charge, and FIG. 2 is a perspective view showing the state of use of the charge, with a portion shown in cross section. FIG. 3 is an explanatory diagram of wire looseness, FIG. 4 is an explanatory diagram of the circumferential length of the wire loop, and FIG. 5 is a diagram illustrating the relationship between the difference in circumferential length and the number of jumps. In the drawings, 1 is a pail pack, W is a wire laminate, W' is a wire, and L is a loose wire. Applicant: Nippon Steel Welding Industry Co., Ltd. Representative Patent Attorney Minoru Aoyagi Figure 3 (a) (l:1) Figure 4

Claims (1)

[Claims] A load of welding wire which is twisted and loaded into a pail pack, the welding wire being characterized in that the difference in circumferential length between any adjacent wire loops is 45 or less. Loading material.