JPH0992424A - Welding device for connecting electric wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably perform the welding of the connection part of a different cross sectional area by preventing the generation of uneven wear of an electrode and ununiformity of a current density. SOLUTION: A first electrode 20 having a different width is fitted to each of four first bases 13 capable of being rotated and moved. Also, a second base 14 is disposed opposite to each of the first bases 13, and each of the second bases 14 is approachably and separably supported to each of the first bases 13 by a supporting member 16. A second electrode 21 which makes an electrode pair with each of the first electrodes 20 is fitted to each of the second bases 14, and the electrode pairs of each of the first electrodes 20 and each of the second electrodes 21 are alternatively and movably disposed in the pressing position by a pressing means. Also, a voltage is applied between both electrodes 20, 21 to perform welding in the state that the interconnection part of a plurality of electric wires and the connection part of electric wires and terminals are held between both selected electrodes 20, 21 with the second electrode 21 pressed by the pressing means.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a one-sided electrode,
A welding device for wire connection, which applies a voltage between both electrodes in a state in which a connection part of a plurality of electric wires is sandwiched between the one side electrode and the other side electrode forming an electrode pair, and welds the connection part. Regarding

[0002]

2. Description of the Related Art In a wire harness used in automobiles, industrial equipment, etc., electric wires or electric wires and terminals are often connected by resistance welding. In this case, the number of electric wires, conductor diameter, and terminal size are used. Current,
Welding conditions such as energization time, pressure, and optimum electrode width are defined.

However, since there are many kinds of conductor diameters of the electric wires used in this wire harness, when connecting a plurality of electric wires having several kinds of conductor diameters in combination as described above, the cross-sectional area of the connecting portion (hereinafter This is called a total size), and if you try to resistance weld multiple connection parts of different total sizes, you must prepare electrodes with different widths according to the total size. Since the machine can basically only attach electrodes of one type of width, multiple welding machines with different electrode widths can be used to weld joints with different total sizes in the same process in the process of manufacturing a wire harness. You need to prepare.

Therefore, as shown in FIG. 6, the electrodes 1a and 1b having a relatively wide width are used, and the arrangement of the holding jigs 2a and 2b of the electrodes 1a and 1b is changed, whereby the state of FIG. As in the state, it is considered that the effective holding width of the electric wire connecting portion between the electrodes 2a and 2b can be appropriately changed so that welding of different total sizes can be performed with the same electrode width. In addition, in FIG. 6, 3 indicates a welding power source.

[0005]

[0006] However, FIGS.
As shown in Fig. 6, when trying to cope with welding of different total sizes by the holding jigs 1a and 1b, the electrode consumption becomes uneven when the welding of small size increases, and conversely when the welding of large size is performed, the electric wire is used. Is not compressed uniformly,
There is a problem that the welding performance becomes unstable due to inconveniences such as uneven current density, which makes practical application difficult.

The problem to be solved by the present invention is to prevent uneven consumption of electrodes and non-uniformity of current density and to enable stable welding of connecting portions having different cross-sectional areas. is there.

[0007]

According to the first aspect of the present invention,
Between the one-side electrode and the other-side electrode forming the electrode pair with the one-side electrode, the connecting portion between the plurality of electric wires or the connecting portion between the electric wire and the terminal is sandwiched by the pressing of the other-side electrode by the pressing means. In the welding device for wire connection, in which a voltage is applied between the two electrodes to weld the connection portion, the one side electrode and the other side electrode forming an electrode pair with the one side electrode have different widths. A plurality of electrodes are provided, and the electrode pair of each of the one-side electrodes and each of the other-side electrodes is selectively movably arranged at the pressing position by the pressing means.

At this time, as described in claim 2, each of the electrode pairs is arranged so as to be movable around the rotation axis by a predetermined rotation angle, or as in claim 3, each of the electrode pairs is moved. It is effective that they are arranged on a straight line so that they can be moved by a predetermined amount in both directions.

According to a fourth aspect of the present invention, a plurality of one bases that are movably provided and are moved by a predetermined amount by the moving means, and a supporting member that is arranged so as to face each of the one bases. Approaching each one of the bases,
A plurality of other bases supported by the respective one bases so as to be separated from each other and interlocked with the respective one bases, an urging means for urging the other bases in the separating direction, and a predetermined position Pressing means for pressing the moved other base in the direction of the one base, a plurality of one-side electrodes with different widths provided on each of the one bases, and each of the other bases provided with When the pressing means presses the other base, a plurality of other side electrodes that pair with each of the one side electrodes and sandwich a connecting part between a plurality of electric wires or a connecting part between an electric wire and a terminal, and the connecting part It is preferable to include a power supply that applies a voltage between the one-side electrode and the other-side electrode that sandwich the electrode.

At this time, as described in claim 5, the moving means comprises a rotating shaft and a driving means for the rotating shaft, and the respective one bases are rotationally moved by rotating the rotating shaft by a predetermined angle, or As described in Item 6, the moving means is composed of a moving body that moves bidirectionally in a straight line and a driving means for the moving body, and it is advantageous that each of the bases is interlocked with movement of the moving body by a predetermined amount. Target.

Therefore, according to the first and fourth aspects of the present invention, one side and the other side electrodes having a width corresponding to the size of the connecting portion to be welded are selected, and the selected electrode pair is set to the pressing position by the pressing means. By appropriately moving the electrodes, it is possible to prevent the uneven consumption of electrodes and the non-uniformity of the current density as in the conventional case, and it is possible to stably weld the connecting portions having different cross-sectional areas.

By the way, it is desirable that each electrode is formed of tungsten.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) FIG. 1 is a schematic view of a first embodiment of the present invention, FIG. 2 is a partial front view, and FIG. 3 is a partial sectional view of FIG.

As shown in these figures, a welding head base 11 is attached to a rotary shaft 10 which is composed of the shaft itself of a motor (not shown) as a driving means or which is connected to the motor shaft. Four first bases 13, which are one base whose position is moved by rotation of the rotating shaft 10 by a predetermined angle (here, 90 °), are provided, and are opposed to each of the first bases 13. The second base 14, which is the other base, is arranged.

At this time, one end of a rod-shaped support member 16 is attached to a corner of each second base 14 with a substantially cylindrical insulator 17 interposed (see FIG. 3).
The other end of the first base 13 is inserted into a through hole in the corner of the first base 13, and a spring 19 as a biasing means is wound around the support member 16 between the first and second bases 13 and 14, Both ends of 19 are locked to the first and second bases 13 and 14 to urge the second base 14 in a direction away from the first base 13, whereby each second base 14 is moved. The first base 13 is supported so that it can approach and separate from each other. However, the support member 1 that penetrates the first base 13
6 is provided with a stopper so that it does not come out from the through hole of the first base 13.

Then, the first electrodes 20 which are one-side electrodes having different widths are mounted on the respective first bases 13, and the respective first electrodes 20 and the electrode pairs are mounted on the respective second bases 14. Second electrodes 21, which are electrodes on the other side having different widths to be formed, are mounted respectively, and when the rotating shaft 10 rotates, for example, the rotating shaft 10 in FIG.
When the first and second bases 13 and 14 move to the 2 o'clock position, the second base 14 together with the second electrode 21 are moved by the pressing means including a press machine and a pressing body 23 (not shown). The first electrode 13 is pressed in the direction of the first electrode 13 and the second electrode 21 moves in the direction of the first electrode 20 forming a pair with the second electrode 21 to move both electrodes 2
A connecting portion between a plurality of electric wires or a connecting portion between an electric wire and a terminal is sandwiched between 0 and 21.

By the way, each of the electrodes 20 and 21 is made of, for example, tungsten. As shown in FIG. 2, the first electrode 20 is disposed in the recess 24 of the first base 13, and the second electrode 21 is the second electrode. When moved in the direction of the first electrode 20, the connecting portion to be welded is accommodated and held in the space formed by both electrodes 20 and 21 and the inner peripheral surface of the recess 24 of the first base 13. .

Further, both electrodes 20 and 21 are contacted with a conductive member 25, which is embedded in the first and second bases 13 and 14 and is made of copper or the like, while maintaining electrical continuity, and a welding power source 27 is electrically connected. Power is supplied to both electrodes 20, 21 via a pressing body 23 and a power supply body 28 that are electrically connected. At this time, the pressing body 23 moves in the direction of the second base 14 only at the time of welding, and normally the second body 14 moves in the second direction.
Is held in a standby state at a position away from the base 14.

Then, the first and second electrodes 2 having a width corresponding to the size (cross-sectional area) of the wire connecting portion to be welded
The electrode pair consisting of 0 and 21 is selected, and the selected electrode pair is appropriately moved to the pressing position by the pressing means (the position at 12 o'clock in FIG. 1), and the first electrode 20 and the recess 24 of the first base 13 are selected.
The connection part is accommodated in the accommodation space defined by the inner peripheral surface of the second base 14 and the pressing body 23 is operated by the pressing body 23.
Is pressed in the direction of the first base 13, a predetermined pressure is applied to the connection portion in the accommodation space by the second electrode 21, and a predetermined welding current is passed between the electrodes 20 and 21 by the power supply 27 for a predetermined time. Flow to perform resistance welding of the connection.

Therefore, since the electrode pair of the first and second electrodes 20 and 21 having the width corresponding to the size of the connecting portion to be welded can be selected, the electrode pressing jig 2 shown in FIGS. 6 and 7 can be selected.
It is possible to prevent uneven electrode consumption and non-uniformity of current density as in the case of using a and 2b, and it is possible to stably weld connecting portions having different cross-sectional areas.

(Second Embodiment) FIG. 4 shows a second embodiment of the present invention.
5 is a schematic diagram of an embodiment of the first embodiment, as shown in FIG.
The pair of second bases 13 and 14, and the first and second electrodes 2
Six electrode pairs of 0 and 21 are provided respectively, and these are rotated by 60 ° by the rotation of the rotary shaft 10, and it is possible to select one of the six electrode widths according to the size of the connection portion to be welded. And in this case also the first
It is of course possible to obtain the same effect as in the case of the first embodiment, and since the selectable electrode width is two patterns larger than that of the first embodiment, it is possible to weld a larger total size of connection portions. Will be possible.

However, in FIG. 4, reference numeral 30 denotes a pressurizing power feeding mechanism including a pressing machine and a welding power source.

The number of pairs of the first and second bases 13 and 14 and the number of electrode pairs of the first and second electrodes 20 and 21 is not limited to the above four or six, but two. The above required number may be provided.

(Third Embodiment) FIG. 5 shows a third embodiment of the present invention.
FIG. 6 is a schematic view of the embodiment of FIG. 5, in which a pair of three first and second bases 13 and 14 moves bidirectionally on a straight line by driving means (not shown). 32, the electrode pairs of the first and second electrodes 20 and 21 having different electrode widths are attached to each pair of the first and second bases 13 and 14, and the size of the connection portion to be welded is set. When an electrode pair having a certain electrode width is selected, the selected electrode pair is moved to a pressing position by the pressurizing and feeding mechanism by moving the base board 32 by a predetermined amount.

Therefore, according to the third embodiment, the same effect as that of the first embodiment can be obtained.

The urging means for urging the second base 14 is not limited to the spring 19 described above, but the support member 1
6 is not limited to the one described above, either, and these are the second base 1 arranged so as to face the first base 13.
It suffices that the 4 can be supported so that it can move toward and away from the first base 13.

The material of each of the electrodes 20 and 21 is not limited to the above-mentioned tungsten.

[0028]

As described above, according to the inventions of claims 1 and 4, since the electrode pair of the one side electrode and the other side electrode depending on the size of the connecting portion to be welded can be selected,
By appropriately moving the selected electrode pair to the pressing position by the pressing means, it is possible to prevent uneven electrode consumption and non-uniformity of current density as in the case of using a conventional electrode pressing jig, and to prevent different cross-sectional areas. The connection part can be welded stably, which is extremely effective for manufacturing wire harnesses for automobiles and industrial equipment.

[Brief description of drawings]

FIG. 1 is a schematic diagram of a first embodiment of the present invention.

FIG. 2 is a partial front view of the first embodiment of the present invention.

FIG. 3 is a partial cutaway front view of the first embodiment of the present invention.

FIG. 4 is a schematic diagram of a second embodiment of the present invention.

FIG. 5 is a schematic diagram of a third embodiment of the present invention.

FIG. 6 is a schematic view of a conventional example in a certain state.

FIG. 7 is a schematic view of a conventional example in a different state.

[Explanation of symbols]

 Reference Signs List 10 rotary shaft 13 first base (one base) 14 second base (other base) 16 support member 19 spring (biasing means) 20 first electrode (one side electrode) 21 second electrode (other) Side electrode) 23 Pressing body 27 Welding power source

Claims (7)

[Claims] 1. A connection portion between a plurality of electric wires or an electric wire and a terminal between one side electrode and the other side electrode forming an electrode pair with the one side electrode by pressing the other side electrode by a pressing means. In the electric wire connecting welding device that welds the connecting portion by applying a voltage between the two electrodes while sandwiching the connecting portion, the one side electrode and the other side electrode forming an electrode pair with the one side electrode. A plurality of electrodes each having a different width are provided, and an electrode pair of each of the one-side electrodes and each of the other-side electrodes is selectively movably arranged at a pressing position by the pressing means. Welding equipment for connecting electric wires. 2. The welding apparatus for wire connection according to claim 1, wherein each of the electrode pairs is arranged so as to be movable around a rotation axis by a predetermined rotation angle. 3. The electric wire connecting welding device according to claim 1, wherein each of the electrode pairs is arranged so as to be bidirectionally movable by a predetermined amount on a straight line. 4. A plurality of one bases that are movably provided and are moved by a predetermined amount by a moving means, and a support member that is disposed so as to face each one of the bases to approach each of the one bases, A plurality of other bases supported by the respective one bases so as to be separated from each other and interlocked with the respective one bases, an urging means for urging the other bases in the separating direction, and a predetermined position A pressing unit that presses the other base that has moved in the direction of the one base, a plurality of one-side electrodes having different widths that are provided on each of the one bases, and a plurality of electrodes that are provided on each of the other bases. When the other base is pressed by the pressing means, a plurality of ones are paired with each of the one-side electrodes to sandwich a connecting part between a plurality of electric wires or a connecting part between an electric wire and a terminal. Square side electrode and said connecting portion cable connecting the welding device being characterized in that a power source for applying a voltage between the one side electrode and the other side electrode sandwiching the. 5. The moving means comprises a rotary shaft and a driving means for the rotary shaft, and the one of the bases is rotationally moved by rotating the rotary shaft by a predetermined angle. Welding equipment for connecting electric wires. 6. The moving means comprises a moving body that moves bidirectionally in a straight line and a driving means for the moving body, and each of the bases is interlocked with movement of the moving body by a predetermined amount. The welding apparatus for connecting electric wires according to claim 4. 7. The electric wire connecting welding device according to claim 1, wherein each of the electrodes is made of tungsten.