JP3300247B2 - Aluminum alloy wire for container welding - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding wire in a container used for welding an aluminum alloy using a welding robot or an automatic machine, and more particularly to a welding wire in a container capable of obtaining good welding workability. It relates to an aluminum or aluminum alloy wire.

[0002]

2. Description of the Related Art When welding an aluminum alloy, in the automatic welding using a robot and an automatic machine, a large-capacity (large weight) welding aluminum or aluminum alloy wire has conventionally been used in order to reduce the frequency of wire replacement. It is used. Hereinafter, aluminum or aluminum alloy wires are collectively referred to as aluminum wires.

By the way, aluminum wires for welding are:
Since inert gas welding is softer than mild steel wire and is sensitive to arc fluctuations, etc., it is necessary to strictly control the wire feeding conditions in the torch cable and the power feeding condition with the power supply tip in the torch cable. .
Therefore, at the time of welding using this aluminum wire, the properties of the wire such as wire habits are important factors in order to ensure good welding workability.

A large-capacity welding wire for a container has the following most different properties from a small-capacity spool-wound wire in the following points. That is, since the welding wire with a large capacity is housed in the container so that the wire is drawn out in the direction perpendicular to the lamination surface, that is, in the coil axis direction of the wire laminated in a coil shape, When this wire is pulled out, twisting occurs in the circumferential direction of the wire. As a result, line runout tends to occur at the tip of the torch during welding. Further, if the wire passing through the torch has an excessively bent shape, the feed resistance increases, which causes a feed failure such as buckling of the wire.

Therefore, when storing the wire in the container, the wire is preliminarily twisted and stored so that the twist after the wire is pulled out is cancelled and becomes zero, so that the wire is drawn straight out. A designed pack-winding aluminum welding wire has been proposed (JP-A-61-88995).

[0006]

However, if the wire drawn out of the container is excessively linear, the contact pressure between the power supply tip and the wire becomes small, and the power supply point tends to become unstable. In some cases, it is difficult to obtain a good good arc.

In order to stabilize the contact pressure with the power supply tip, a welding wire in a container manufactured by intentionally forming a bending habit has been disclosed (Japanese Patent Application Laid-Open No. 58-35068). However, workability at the time of welding using aluminum wire is easily affected by the feeding performance,
For example, it is difficult to apply such a method to an aluminum wire because a linear shape that does not become a circular shape in a released natural state is essential.

The present invention has been made in view of the above-mentioned problems, and has a small line runout during welding, can maintain good arc stability, and preferably has a small bend and entanglement of the wire. It is an object of the present invention to provide an aluminum or aluminum alloy wire for welding in a container, which can obtain a stable feedability without performing welding.

[0009]

An aluminum or aluminum alloy wire for welding in a container according to the present invention is a welding wire for a container which is housed in a container in the form of a coil. The twist angle per 1 m of the wire when pulled out is 10 to 90 °.

The wire is pressed by a pressing member in the container, and the weight W (g) of the pressing member is
Ratio of wire tensile strength T (N / mm ² ) to
W) is Ru 0.3 to 1.3 der. Further, it is desirable to be housed in a container having an inner cylinder at the shaft center.

Further, it is preferable that the wire is pressed in the container by a pressing member having a circular guide hole for drawing out the wire, and is drawn out of the container along the periphery of the guide hole.

Further, the aluminum or aluminum alloy wire for welding in a container according to the present invention has an outer diameter of 30.
It is desirably stacked and housed in a container having a height of 0 to 700 mm and a height of 300 to 1000 mm, and preferably has a wire weight of 20 to 150 kg.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the accompanying drawings. FIG. 1 is a perspective view showing a welding aluminum wire in a container according to an embodiment of the present invention. FIG. 2 is a schematic diagram showing an example of a method for manufacturing a welding aluminum wire in a container according to an embodiment of the present invention. As shown in FIG. 1, an inner cylinder 7 is provided at an axial portion inside a cylindrical container 6, and around the inner cylinder 7, an aluminum wire 1 having an appropriate twist is provided.
Are stacked in a coil shape and housed in the container 6.
A holding member 8 is placed on the aluminum wire 1, and an inner cylinder 7 is provided at the center of the holding member 8.
A guide hole 9 having a diameter slightly larger than the outer diameter of the guide hole 9 is formed. The aluminum wire 1 is drawn out along the periphery of the guide hole 9.

This aluminum wire for welding in a container can be produced, for example, by the following method.
As shown in FIG. 2, above the container 6, a wire twisting device 2 that is driven to rotate is supported by an arm (not shown) or the like with its rotation axis set in a vertical direction. Is provided with a plurality of columnar wire support members 2a. The aluminum wire 1 is supported by the device 2 by being sandwiched between these support members 2a so that the wire 1 does not rotate in the circumferential direction. Also,
The wire 1 is sent out from above by the device 2, is inserted into a tubular guide 3 disposed below the wire twisting device 2, and is housed in a container 6 below the wire guide 3. I have.

When a welding aluminum wire in a container is manufactured by using these devices, the aluminum wire 1 processed to a desired diameter is fed into the container 6 via the wire twisting device 2 and the guide 3. . At this time, for example, the device 2 is rotated in the direction indicated by the arrow 4 in the drawing, and the guide 3 is also rotated in the direction indicated by the arrow 5. Then, the wire 1 is given an appropriate twist and stacked and stored in a coil shape in the container 6.

FIG. 3A is a schematic diagram showing a method for measuring the twist angle of the wire, and FIG. 3B is a schematic diagram showing the twist angle of the wire. As shown in FIG. 3, the container 6 in which the wires 1 are stored is covered with, for example, a wire drawing jig 10 in which a wire drawing hole 10a is formed. In such a case, first, the distal end of the wire 1 immediately after being pulled out from the hole 10a is bent at a right angle to form a bent portion 11a.

Next, the wire 1 is pulled out by 1 m in the vertical direction from the hole 10a without fixing the tip portion in the circumferential direction of the wire. The bent portion 1 immediately after being pulled out from the hole 10a
The angle α (°) at which the bent portion rotates from the position A in plan view of 1a to the position B in plan view of the bent portion 11b drawn 1 m from the hole 10a is the twist angle of the wire.

In this embodiment, since the wire 1 is housed in the container 6 by twisting the wire so that the twist angle is 10 to 90 °, the wire 1
Can be appropriately bent after the wire is pulled out. The wire drawn from the container passes through the power supply tip, for example, via a conduit liner in a welding torch. At this time, since the wire 1 is twisted, its shape has a swell similar to a sine wave having a helical shape. The greater the twist of the wire 1, the greater the swell, the greater the feeding failure or the line deflection at the tip of the torch, and the smaller the twist of the wire 1, the smaller the swell, and the wire becomes linear.

If the twist angle of the wire 1 is less than 10 °, the wire passing through the power supply tip becomes too linear, and the contact pressure with the tip decreases and becomes unstable.
It is difficult to obtain stable current during welding. As a result, the arc becomes unstable, and fusion with the chip occurs during welding. On the other hand, if the torsion angle of the wire 1 exceeds 90 °, the undulation of the wire becomes excessive, so that the line deflection at the tip of the torch increases during welding, and the bead meanders. Further, the feeding resistance of the wire in the conduit cable increases, and the arc becomes unstable. Therefore, by setting the twist angle of the wire to 10 to 90 °, when the wire 1 is pulled out from the container 6, the wire does not become excessively linear, and a decrease in arc stability can be suppressed. . Further, since the wire does not have an excessively bent shape, it is possible to prevent occurrence of wire feeding failure. The twist angle of the wire refers to the rotation angle of the tip when the wire is pulled 1 m from the container without fixing the tip of the wire, regardless of the rotation direction.
Absolute value. That is, the twist may be given in either the clockwise direction or the counterclockwise direction.

In the present embodiment, as shown in FIG. 1, since the wire 1 is pressed by the pressing member 8 in the container 6, the wires 1 stacked in the container 6
When the wire is pulled out, entanglement due to the jumping up of the wire is prevented, and the wire 1 can be drawn out smoothly. However, since the aluminum wire is lighter and softer than the mild steel wire, if the weight of the pressing member 8 is too large, deformation such as bending when the wire is pulled out easily occurs. Therefore, in the present embodiment, the wire (T / W) such that the ratio (T / W) of the tensile strength T (N / mm ² ) of the wire 1 to the weight W (g) of the pressing member 8 is 0.3 to 1.3. The tensile strength of No. 1 is adjusted.

The ratio (T / W) of the tensile strength T (N / mm ² ) of the wire 1 to the weight W (g) of the pressing member 8 is equal to 0.
If it is less than 3, the wire may be bent at the contact point with the pressing member when the wire is pulled out, and unstable deformation occurs. On the other hand, when the ratio (T / W) exceeds 1.3, the holding member is lifted together with the wire when the wire is pulled out.
The effect as the holding member cannot be obtained, and the wire may jump up. Therefore, the wire tensile strength T (N / mm ² ) with respect to the weight W (g) of the pressing member
Is preferably 0.3 to 1.3. In addition, the tensile strength of the wire can be adjusted by a softening process and a wire drawing process during the production of the wire.

Further, as shown in FIG. 1, in this embodiment, since the inner cylinder 7 is formed in the container 6 in which the wire 1 is stored, the movement of the wire 1 in the container 6 becomes smooth, When the wire 1 is pulled out, it is possible to prevent the wire from becoming entangled.

Further, in the present embodiment, the holding member 8
Is provided with a circular guide hole 9 for wire withdrawal.
Since the wire 1 is drawn out of the container 6 along the peripheral edge of the guide hole 9, when the wire 1 stacked in the container 6 is drawn out, it is possible to prevent the wire 1 from being entangled by jumping up. At the same time, it is possible to prevent the wire 1 from being deformed due to the contact between the wire 1 and the end of the holding member 8, and to smoothly pull out the wire 1 from the container.

Further, in this embodiment, the outer diameter of the container 6 is 300 to 700 mm and the height is 300 to 100 mm.
0 mm, and the weight of the wire stored in the container 6 is 20 mm.
To 150 kg. If the outer diameter of the container in which the wires are stored is less than 300 mm, the laminated wires will have a bending habit and the wire deflection will increase. On the other hand, if the outer diameter of the container exceeds 700 mm, a large space is required for installing the container in which the wires are stored, which is not practical.
On the other hand, if the height of the container is less than 300 mm, the capacity is equivalent to that of the spool wound wire, and the advantage of the large capacity of the welding wire in the container cannot be obtained. On the other hand, if the height of the container exceeds 1000 mm, operations such as filling the container into the wire feeding device become difficult.

If the weight of the wire is less than 20 kg, the capacity is equivalent to that of the spool wound wire, and the advantage of the large capacity of the welding wire in a container cannot be obtained. On the other hand, if the weight of the wire exceeds 150 kg, the load on the wire stacked on the bottom of the container increases, which may cause deformation. Therefore, when the size and the wire weight of the container 6 in which the wire is stored are defined as described above, the welding workability is improved, and the highly practical aluminum or aluminum alloy wire 1 in a container can be obtained.

[0026]

EXAMPLES Examples of the aluminum or aluminum alloy wire for welding in a container according to the present invention will be specifically described below in comparison with comparative examples.

First Embodiment First, in order to clarify the prescribed range of the wire twist angle in the present invention, aluminum or aluminum alloy wires for welding in a container were manufactured under various conditions shown in Table 1 below, and this wire was used. The welding workability was evaluated by welding under the welding conditions shown in Table 2 below. However, 100 kg of an aluminum wire having a diameter of 1.2 mm was placed in a container having an outer diameter of 600 mm and a height of 800 mm.
Stacked and stored. The evaluation results of the welding test are shown in Table 3 below.
In the evaluation result column in Table 3 below, ○ indicates good, and △ indicates
Indicates that it is slightly defective, and X indicates that it is defective.

[0028]

[Table 1]

[0029]

[Table 2]

[0030]

[Table 3]

As shown in Tables 1 and 3 above, Example N
o. 5 and 6 and Reference Example Nos. In Nos. 1 to 4 , since the twist angle of the wire was within the specified range of the present invention, no wire deflection occurred, and the arc stability and the feed resistance were good.

On the other hand, in Comparative Example No. In Nos. 7, 9 and 11, since the wire twist angle was less than the lower limit of the range of the present invention, fusion with the chip occurred during welding, and good welding workability could not be obtained. Also, in Comparative Example No. In 8, 10, and 12, since the wire twist angle exceeded the upper limit of the range of the present invention, the linearity of the bead decreased due to line runout.

Second Example Next, in order to clarify the specified range of the ratio (T / W) of the wire tensile strength T (N / mm ² ) to the weight W (g) of the pressing member, the following Table 4 was used. Manufacture aluminum or aluminum alloy wires for welding in containers under various conditions shown,
Using this wire, the welding workability was evaluated under the same welding conditions and evaluation criteria as in the first example. Table 5 below shows the results of the welding test evaluation. In this embodiment, T /
Examples in which W was within the preferred range defined in the present invention were taken as examples, and those out of this range were taken as comparative examples.

[0034]

[Table 4]

[0035]

[Table 5]

As shown in Tables 4 and 5 above, Example N
o. 17 and 18 and Reference Example Nos. 13/16 is T / W
Is within the preferred range defined in the present invention,
A good feed resistance could be obtained without causing small bending or entanglement of the wire.

On the other hand, in Comparative Example No. 19, 21 and 23
Since the T / W is less than the lower limit of the preferred range of the present invention, the weight of the pressing member was too large, the wire could not be pulled out smoothly, and the wire was sometimes bent. Comparative Example No. 20, 22, and 24
However, the tensile strength of the wire was too high, the holding member was lifted together with the wire, and the effect of using the holding member could not be obtained, and the smooth pulling out of the wire was hindered.

Third Embodiment In order to clarify the effect of the inner cylinder in the container and the effect of using the guide hole in the holding member, the following Table 6 was used.
The aluminum or aluminum alloy wire for welding in a container was manufactured under various conditions shown in Table 2, and using this wire, welding was performed under the welding conditions shown in Table 2 above, and welding workability was evaluated. However, in Example 6 in Table 6 below . 29, comparative example
No. 25 and 27 and Comparative Example Nos. In the tests for evaluating the effect of the inner cylinder shown in 31, 33 and 35, a conduit cable smaller than a standard inner diameter is used as a conduit cable through which the wire after being pulled out of the container is inserted, and the twist of the wire is released. It was set to be difficult to be performed. That is, a feeding test was performed in a container under conditions in which the wire was likely to jump or the lamination of the wire was likely to be disturbed. The evaluation results of the welding test are shown in Table 7 below. In this example, an example in which the inner cylinder was provided in the container, and the wire was drawn out using the guide hole of the holding member was set as an example, and the other examples were set as comparative examples.

[0039]

[Table 6]

[0040]

[Table 7]

As shown in Tables 6 and 7 above, Example N
o. 29 and 30 and Reference Example Nos. In the case of 25 to 28, the wires are housed in a container having an inner cylinder, so that even if the wires jump up or the stacking of the wires is disturbed in the container, the wires are entangled by the presence of the inner cylinder. Was prevented, and there was no disturbance in the feed. Further, in the container, the wire is pressed by the pressing member having the guide hole, and the wire is drawn out of the container along the peripheral portion of the guide hole, so that the contact resistance between the pressing member and the wire is reduced. As a result, the wire could be smoothly pulled out and fed without affecting the properties of the wire.

On the other hand, in Comparative Example No. 31, 33 and 35
Since the wire was housed in a container having no inner cylinder, the wires were entangled in the container. Also, in Comparative Example No. In Nos. 32, 34, and 36, the wires were drawn from the outer peripheral edge of the holding member to above the center of the container without using the guide holes of the holding member. Therefore, the contact resistance between the outer peripheral edge portion of the pressing member and the wire is increased, and the wire is slightly bent, and the feeding of the wire is disturbed.

[0043]

As described in detail above, according to the present invention,
Since the twist angle when the wire is pulled out of the container is defined, the wire can be appropriately bent, and a reduction in arc stability that occurs when the wire has an excessively linear shape can be suppressed. In addition to this, it is possible to prevent the occurrence of feeding failure when the wire has an excessively bent shape. Further, the wire is pressed by the pressing member in the container, and when the ratio of the wire tensile strength to the weight of the pressing member is within an appropriate range, the entanglement of the wire is prevented, and the wire can be pulled out smoothly. At the same time, it is possible to prevent deformation such as bending when the wire is pulled out.

Further, when the inner cylinder is formed at the axial center of the container in which the wire is stored, the movement of the wire in the container can be further smoothed, and the entanglement of the wire can be prevented. it can. Furthermore, when the wire is pressed in the container by a pressing member having a wire guide circular guide hole and is drawn out of the container along the peripheral edge of the guide hole, when the wire is pulled out, the wire The wire can be prevented from being deformed due to contact with the end of the holding member, and the wire can be smoothly pulled out of the container.

Furthermore, if the dimensions of the container in which the wires are stored are properly selected, the welding workability is improved, and
A highly practical aluminum or aluminum alloy wire for a container can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an aluminum wire for welding in a container according to an embodiment of the present invention.

FIG. 2 is a schematic view showing an example of a method of manufacturing a welding aluminum wire in a container according to an embodiment of the present invention.

FIG. 3A is a schematic diagram illustrating a method of measuring a twist angle of a wire, and FIG. 3B is a schematic diagram illustrating a twist angle of a wire.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1; Wire 2; Wire twisting device 3; Guide 6; Container 7; Inner cylinder 8; Holding member 9;

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hideo Sugawara 3-36 Nagatano-cho, Fukuchiyama-shi, Kyoto Inside the Kobe Steel Fukuchiyama Plant (56) References JP-A-61-88995 (JP, A) JP-A-56-99076 (JP, A) JP-A-61-183057 (JP, A) JP-A-57-151352 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B23K 9 / 133 B23K 35/02 B23K 35/28

Claims (4)

(57) [Claims] 1. A coil is stacked and stored in a container.
In the welding wire with container of JIS 5000 series, the wire 1 when pulled out from the container in the axial direction of the coil.
with torsional angle per m is 10 to 90 °, before
Pressed by a holding member in the container,
Wire tensile strength T (N
/ Mm ²⁾ ratio (T / W) is this <br/> and containers welding A aluminum alloy wire, characterized in that 0.3 to 1.3. 2. The holding member is a wire drawing circle.
Has the form guide hole, containers welding A aluminum alloy wire according to claim 1, characterized in that it is withdrawn from the container along the periphery of the guide hole. 3. A packaged welding A aluminum alloy wire according to claim 1 or 2, characterized in that it is housed in a container having an inner cylinder in the axial section. 4. An outer diameter of 300 to 700 mm and a height of 3
00 to have been stacked and stored in the container is 1000 mm, containers welding A aluminum alloy wire according to any one of claims 1 to 3, characterized in that the wire weight is 20 to 150 kg.