JPH0446679A - Resistance welding equipment - Google Patents

Abstract

PURPOSE:To surely weld a wire to a terminal having a small welding area by providing a cutter mechanism to cut the wire after welding and a wire forming means to form the wire into a shape along the electrode face after the wire is cut on the resistance welding machine. CONSTITUTION:The resistance welding equipment is provided with the cutter mechanism 8 which is movable in the direction of the tip of an electrode 2 from above an electrode part 1 of the resistance welding equipment and cuts the wire 32 after welding of the wire 32 to a member 17 and the wire forming means 4 which clamps the wire 32 being supplied to the lower part of the electrode 2 after the wire being cut by the cutter mechanism 8 and forms it into the shape along the electrode face. Accordingly, when the wire 32 is welded to the member 17 and the wire 32 is cut by the cutter mechanism 8, the wire 32 being supplied to the lower part of the electrode by the wire forming means 4 is clamped after this and formed into the shape along the electrode face.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a resistance welding device that connects a wire between, for example, two welding terminals by resistance welding.

(Prior art) Figure 14 is a diagram showing the configuration around the head of a resistance welding device.
FIG. 15 is a configuration diagram seen from the direction AA. Reference numeral 1 denotes an electrode section provided on a welding head (not shown) that is movable, for example, up and down and back and forth. This electrode part 1 is
For example, a pair of parallel positive electrodes 2 and ground electrodes 3
are arranged along the vertical direction. A rear clamper 4 that can be opened and closed is provided on the blade immediately after the ground electrode 3. Further, a wire nozzle 5 is provided protruding from the rear end of the rear clamper 4. The entire nozzle of the wire nozzle 5 is inclined at an angle toward the tip of the positive electrode 2, so that the wire 6 can be guided to the tip of the electrode from a direction oblique to the electrode 2. On the other hand, a front clamper 7 is provided on the side directly in front of the electrode 2 opposite to the rear clamper 4 so as to be movable up and down in the vertical direction. Furthermore, a cutter 8 for cutting the wire is provided on the front side of the front clamper 7. This cutter 8 is, for example, an electrode 1
The wire nozzle 5 is movably supported along a movement path (not shown) inclined at an angle toward the tip of the wire nozzle 5
and the electrode tip intersect.

On the other hand, the control system has a configuration shown in FIG. That is, a head moving device 10 that moves the welding head up and down as well as in the left and right directions. Front clamper lifting device 11 for lifting and lowering the front clamper 7. Cutter lifting device 12 for lifting and lowering the cutter 8. Front clamper drive device 13 that opens and closes the front clamper 7. A rear clamper drive device 14 for opening and closing the rear clamper 4 is provided with a welding power source 15 connected between the positive electrode 2 and the ground electrode 3, and these are connected to a control circuit 16 composed of a microcomputer or the like.

With such a configuration, the wire 6 is led out to the tip of the electrode 2 through the wire nozzle 5 in advance. The wire 6 on the rear side of the electrode 2 is clamped by the rear clamper 4. Then, the first welding terminal 17 is positioned directly below the electrode 2.

Next, as shown in FIG. 17, the entire welding head begins to descend, and the tip of the electrode 2 presses the wire 6 against the upper surface of the first welding terminal 17. Subsequently, when the tip of the ground electrode 3 contacts the first welding terminal 17, the rear clamper 4 opens and the welding power source 15 energizes the electrode 2 and the ground electrode 3, causing a gap between the electrode 2 and the ground electrode 3. Welding current flows. In this way, the tip of the wire 6 is welded to the upper surface of the first welding terminal 17. When this welding is completed, as shown in FIG. 18, it moves backward by the amount of wire connection at the next welding location. When this movement is completed, the wire 6 is clamped by the rear clamper 4, and then the welding head is lowered in this state. As the wire 6 descends, the middle portion of the wire 6 protruding from the front side of the electrode 2 is clamped by the front clamper 7, as shown in FIG. 19, and the portion of the wire 6 around the electrode 2 is held. Next, as shown in FIG. 20d, the wire 6 is routed between the first welding terminal 17 and the second welding terminal 18, and the middle part of the wire 6 is lowered to the upper surface of the second welding terminal 18. be done.

Then, when the descending wire 6 approaches the second welding terminal 18 as shown in FIG.
Then, the rear clamper 4 is released, and the middle part of the wire 6 at the tip of the electrode 2 is pressed against the upper surface of the second welding terminal 18 and grounded as shown in FIG. Electrode 3 contacts second welding terminal 18 . and,
As with the first welding terminal 17, when the earth electrode 3 contacts, a welding current flows between the electrode 2 and the earth electrode 3, and the middle part of the wire 6 is welded to the upper surface of the second welding stage 18. . When welding with the second welding terminal 18 is completed, the second
As shown in Figure 3, the entire welding head moves upward and is positioned at the wire cutting position. When this position is reached, the cutter 8, which has been waiting, descends obliquely from above toward the tip of the electrode 2, and the wire 6 is cut at the tip of the electrode 2.

When the operation of the cutter 8 is completed, the work of connecting the wire 6 between the first welding terminal 17 and the second welding terminal 18 is completed.

However, if the area of the welding surfaces of the first and second welding terminals 17 and 18 is small, when the wire 6 is pressed by the positive electrode 2, the wire 6 or the first and second welding terminals 17
．． It may deviate from the age of 18. Then, the first and second
It becomes impossible to connect the welding terminals 17 and 18 with the wire 6.

(Problems to be Solved by the Invention) As described above, if the area of the welding terminal is small, the wire will come off and welding will not be possible.

SUMMARY OF THE INVENTION An object of the present invention is to provide a resistance welding device that can reliably weld a wire even if the welding surface of a member to be welded is small.

[Structure of the Invention (Means for Solving the Problems) The present invention provides a method in which a pair of electrodes that can be raised and lowered are pressed into contact with a member to be welded with a wire interposed therebetween, and in this state there is a connection between the electrodes and the member to be welded. In a resistance welding device that welds a wire to a workpiece by applying a current to the workpiece using resistance heat, the device can move forward and backward from above the electrode to the tip of the electrode, and after welding the wire to the workpiece, the wire is welded to the workpiece. The above object is achieved by providing a cutter mechanism for cutting the wire, and a wire forming means for clamping the wire supplied below the electrode and forming it into a shape along the electrode surface after the cutter mechanism cuts the wire. It is a resistance welding device.

(Function) By providing such a means, when a wire is welded to the workpiece and this wire is cut by the cutter mechanism, the wire fed below the electrode is clamped by the wire forming means. The electrode is then molded into a shape that follows the electrode surface.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. Note that the same parts as in FIGS. 14 to 16 are given the same reference numerals, and detailed explanation thereof will be omitted.

FIG. 1 is an overall configuration diagram of a resistance welding device, and FIG. 2 is a block diagram of a control system of the same device.

An operation panel 21 is provided on the pedestal 20. This frame 2
0 is provided with an XY child table 2, and this
A θ table 23 is provided on the Y table 22.

A work lamp mechanism 2 is placed on this θ table 23.
4 is provided, and a circuit element 25, which is a work, is fixed by this work clamp mechanism 24. On the other hand, a welding head mechanism 26 is provided above the circuit element 25 so as to move up and down with respect to the circuit element 25. An electrode section 27 having a positive electrode 2 and a ground electrode 3 is provided at the tip of this welding head mechanism 26, and resistance welding is performed with this electrode section 27 in contact with the welding terminal of the circuit element 25. There is. Moreover, this welding head mechanism 2
A cutter mechanism 29 for moving a cutter 28 forward and backward from diagonally above the electrode portion 27 of No. 6 is provided. Reference numeral 30 denotes a wire supply mechanism, which draws out the wire 32 wound around the bobbin 31 and supplies it to the lower part of the electrode section 27 of the welding head mechanism 26 by a constant length.

Further, the welding head mechanism 26 is provided with a visual recognition camera 33 for recognizing the circuit elements 25, and a control device 34 for the visual recognition camera 33 and its monitor television 35 are also provided on the pedestal 20.
The image captured in step 3 is displayed on a monitor television 35. Further, a power transformer constituting a welding power source and its control device are provided on the pedestal 20, so that electric power for resistance welding is supplied to the welding head mechanism 26. Further, a main controller 36 of the apparatus is provided below the pedestal 20.

The electrode section 27 of the welding head mechanism 26 will be explained as follows.
FIG. 3 shows a configuration diagram of the electrode section 27, and FIG. 4 is a configuration diagram seen from the BB direction.

A wire molding clamper 40 is provided above and in front of each electrode 2.3 in parallel with the cutter 8. This wire forming ramper 40 moves forward and backward in the direction toward the electrode 2, clamps the wire 6 supplied to the electrode 2, and forms it into a shape along the surface of the electrode 2.

Next, the configuration of the main controller 36 will be explained with reference to the block configuration diagram shown in FIG. This main control device 36 has drive circuits 10 to 15, 41 connected to a control circuit 16 comprising a microcomputer. Here, the wire forming drive device 41 includes a cutter mechanism 29
It has a function of clamping the wire 6 supplied below the electrode 2 after cutting the wire 6 by the wire 6, and forming it into a shape along the surface of the electrode 2.

Next, the operation of the resistance welding device configured as described above will be explained.

First, the wire 32 is welded to the first welding terminal 17 formed on the circuit element 25.

Hereinafter, it operates according to each command issued from the control circuit 16. The wire 32 is supplied to the tip of the electrode 2 through the wire nozzle 5 by the wire supply mechanism 30, and is clamped at the rear side of the wire 32 by the rear clamp 4.

With respect to this initial state of the welding head mechanism 26, the first welding terminal 17 of the circuit element 25 is positioned directly below the electrode 2.

Next, the entire welding head mechanism 26 begins to descend under the drive of the head moving device 10, and the tip of the electrode 2 presses the wire 32 against the upper surface of the first welding terminal 17, as shown in FIG. Subsequently, when the tip of the ground electrode 3 contacts the first welding terminal 17, the rear clamper 4 is released (opened) and
Electrode 2 and earth electrode 3 are energized from welding power source 15, welding current flows between electrode 2 and earth electrode 3, and the tip of wire 32 is welded to the upper surface of first welding terminal 17. . After welding the first welding terminal 17,
As shown in FIG. 6, the entire welding head mechanism 26 moves rearward and by the amount of wire connection at the next welding location. When the movement is finished, the rear clamp 4 first clamps the wire 32, and then the welding head mechanism 26 starts to descend in this state. And with that decline,
As shown in FIG. 7, the front clamper 7 clamps the middle part of the wire 32 coming out from the front side of the electrode 2, and
Hold the portion of the wire 32 around the periphery of the wire 32. Subsequently, the welding head moves forward and downward, routing the wire 32 between the first welding terminal 17 and the second welding terminal 18 as shown in FIG. Second
descends to the upper surface of the welding terminal 18.

When the descending wire 32 approaches the second welding terminal 18 as shown in FIG.
The movement path of the wire molded clamper 40 is opened. Then, as shown in FIG. 10, the electrode 2 is connected to the wire 32 at its tip.
The middle part is pressed against the upper surface of the second welding terminal 18, and the ground electrode 3 comes into contact with the second welding terminal 18. Then, as in the case of the first welding terminal 17, the ground electrode 3
With the contact, a welding current flows between the electrode 2 and the earth electrode 3, and the middle part of the wire 32 is welded to the upper surface of the second welding terminal 18. When welding with the second welding terminal 18 is completed, the rear clamper 4 is released and the entire welding head mechanism 26 moves to the rear side to a position where the wire is cut, as shown in FIG. When this position is reached, the cutter 8 and the wire forming ramper 40
moves downward toward the tip of the electrode 2 from an oblique direction, and the cutter 8 cuts the wire 32 at the tip of the electrode 2.

When the wire 32 is cut, the wire forming clamper 40 simultaneously clamps the wire 32 supplied to the electrode 2 near the electrode 2 as shown in FIG. In conjunction with the retreat, the wire forming clamper 40 moves back while clamping the wire 32. By retreating the wire forming clamper 40, the wire 32 is formed along the lower surface of the electrode 2 and in contact with the lower surface of the electrode 2. And wire molded clamper 40
releases the clamp on wire 32 and retreats further.

Next, the rear clamper 4 clamps the wire 32, and the entire welding head mechanism 26 rises and returns to its original position as shown in FIG.

In this way, in the above embodiment, when the wire 32 is cut after welding, the wire forming clamper 4
0 to clamp the wire 32 supplied below the electrode 2 and form it in a shape that follows the lower surface of the electrode 2, so the welding area of the second welding terminal 18 can be reduced. Even if the wire 32 is pressed against the second welding electrode 18 by the electrode 2, the wire 32 will not be displaced from the second welding electrode 18, even if it is small. Therefore, even if the welding area of the second welding electrode 18 is small, welding can be performed reliably. Further, since the wire molding clamper 40 is provided so as to be interlocked with the cutter 8, the mechanism is simpler than providing a completely separate wire molding clamper.

Note that the present invention is not limited to the above-mentioned embodiment, and may be modified without departing from the spirit thereof. For example, the wire molded clamper may be formed on the cutter 8 itself. That is, the cutter is shaped like scissors, and a hook is formed at the tip of each of its two blades. And the wire 32
After cutting the wire 3, each hook holds the wire 3.

[Effects of the Invention] As described in detail above, according to the present invention, it is possible to provide a resistance welding device that can reliably weld a wire even if the welding area of the welded member is small.

[Brief explanation of the drawing]

1 to 13 are diagrams for explaining a resistance welding apparatus according to the present invention, in which FIG. 1 is an overall configuration diagram, FIG. 2 is a block diagram of a main controller, and FIGS. 4 is a configuration diagram of the electrode section, FIGS. 5 to 13 are diagrams for explaining the welding action, and FIGS. 14 to 24 are diagrams for explaining the prior art. Fig. 15 is a block diagram of the electrode section, Fig. 16 is a block diagram of the control system, and Fig. 16 is a block diagram of the control system.
7 to 24 are diagrams for explaining the welding action. DESCRIPTION OF SYMBOLS 1... Electrode part, 2... Positive electrode, 3... Earth electrode, 4... Rear clamper, 7... Front clamper, 8...
・Cutter 17...first welding terminal, 18...second
welding terminal, 4...wire molded clamper. Applicant's Representative Patent Attorney Takehiko Suzue Figure 1 Figure 2 115 Figure 14 Figure 16 Figure 23 Figure 24

Claims (1)

[Claims] A pair of electrodes that can be raised and lowered are pressed into contact with a workpiece to be welded, with a wire interposed between them, and in this state, a current is passed between the electrodes and the workpiece to be welded, and the resistance heat generated at this time causes the wire to be connected to the workpiece. In resistance welding equipment for welding parts,
a cutter mechanism that can move forward and backward from above the electrode toward the tip of the electrode and cuts the wire after welding the wire to the welding member; and a cutter mechanism that cuts the wire after the cutter mechanism cuts the wire; A resistance welding device comprising wire forming means for clamping the wire supplied to the electrode and forming the wire into a shape along the electrode surface.