JP2007000904A - Device for automatically changing-over welding wire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain an automatically changing-over device of a welding wire with which changeover to other welding wires is smoothly performed even when it is during welding. <P>SOLUTION: This device comprises a plurality of primary feeding device 2 for moving the welding wire, a secondary feeding device 10 for moving the welding wire toward a welding torch 26, a torch moving device 25, a wire changing-over device 20 for individually facing the wire delivering ports 5a, 5b of the primary feeding device 2 to the wire introducing port 16 of the secondary feeding device 10, a wire cutting device 30 for cutting the welding wire exposed from the welding torch 26, a sensor 17 for detecting the present of the welding wire and, a controlling device 40 comprising a changeover recognizing part 41 of the welding wire, a drive setting part 42 for setting the driving order of the above respective devices by inputting the signals of the changeover recognizing part 41 and the sensor 17 and a drive commanding part 43 for issuing a driving command to the above respective devices by inputting the signal of the drive setting part 42. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to an automatic welding wire switching device that automatically switches wires of a welding machine.

As a conventional technique, a plurality of wire reels are installed, and a welding wire is provided for each welding base material by installing a jig in the welding head supply unit that automatically follows the sent wire. There was something that switched automatically.

In the conventional device, the tip of the welding wire exposed from the welding torch was not cut, so when switching to another welding wire during welding, the tip of the welding wire used so far was used. Since there is a large-diameter molten ball in the part, the welding wire in use cannot be returned to the supply part of the welding head, so it is difficult to switch to another welding wire during welding. there were.

JP 2002-11576 A

An object of the present invention is to obtain a novel automatic welding wire switching device that can smoothly switch to another welding wire even during welding.

The present invention is configured as follows to achieve the above object. That is, a plurality of primary feeding devices for moving one welding wire in the feeding or winding direction are provided, and one welding wire is directed toward the welding torch on the downstream side of the primary feeding device in the feeding or winding direction. A wire switching device provided with a secondary feeding device to be moved, and a torch moving device for moving the welding torch, wherein the wire discharge port of the primary feeding device individually faces the wire introduction port of the secondary feeding device; A switching recognition unit that includes a wire cutting device that cuts a welding wire exposed from the welding torch, and a sensor that detects the presence or absence of a welding wire at the wire introduction port or the wire discharge port, and inputs a switching signal of the welding wire The switching recognition unit and the sensor signal to input the primary feeding device, the secondary feeding device, the torch moving device, the wire switching device, and the wire cable. A drive setting unit for setting the driving order of the device, and a drive command to the primary feeding device, the secondary feeding device, the torch moving device, the wire switching device, and the wire cutting device by inputting a signal of the driving setting unit Is provided with a control device having a drive command unit that emits.

In the present invention, since the welding wire exposed from the welding torch is cut by the wire cutting device, the welding wire in the welding torch can be smoothly returned to the primary feeding device, and when the wire is returned, By operating the switching device, the wire discharge port of the other primary feeding device can smoothly face the wire introduction port of the secondary feeding device. For this reason, even during welding, it can be easily switched to another welding wire.

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, FIG. 1 is a schematic view of the entire apparatus according to the present invention, FIG. 2 is a side view of a secondary feeding apparatus according to the present invention, FIG. 3 is a plan view of a wire cutting apparatus according to the present invention, and FIG. FIG. 5 is a flowchart showing the operation of the control device according to the present invention.

In FIG. 1, reference numeral 1 denotes an automatic welding wire switching device, which includes a primary feeding device 2, a secondary feeding device 10, a wire switching device 20, a torch moving device 25, a wire cutting device 30, and a control device 40. Become.

The primary feeding device 2 includes primary feeding devices 2A and 2B having substantially the same structure, and has a pair of feeding rolls 3a and 3b that are rotated forward and backward by motors M1a and M1b. The welding wires W1 and W2 wound on a reel (not shown) are individually sandwiched between the feeding rolls 3a and 3b and unwound, and inserted into the flexible tubes 4a and 4b to be inserted into the subsequent stage, that is, the downstream secondary feed. It sends to the feeder 10.

The secondary feeding device 10 sends one welding wire W1 (or W2) fed from the primary feeding device 2 toward the welding torch 26 on the downstream side, as shown in FIG. ing. That is, a drive roll 12 that is rotated forward and backward by a motor M2 and two pairs of upper and lower feed rolls 13 and 14 that are rotated forward and backward by the drive roll 12 are attached to the base 11, and the lower feed rolls 13b and 14b cannot move up and down. In addition, the upper feed rolls 13a and 14a can be adjusted up and down by the adjustment knob 15, and by operating the adjustment knob 15, the clamping force of the welding wire W1 (or W2) by the feed rolls 13 and 14 is adjusted. It has become.

A welding wire introduction pipe (wire introduction port) 16 is attached to the upstream side of the feed rolls 13 and 14 (right part in FIG. 2), and a sensor 17 is attached to the introduction pipe 16. The sensor 17 detects the presence or absence of the welding wire W1 (or W2) in the introduction pipe 16. The sensor 17 may be attached to wire discharge ports 5a and 5b or connection pipes 23a and 23b, which will be described later.

A wire switching device 20 is attached to the right end (upstream end) of the base 11. That is, as shown in FIG. 1, a slider 22 reciprocated in a lateral direction (vertical direction in FIG. 1) by a cylinder 21 is attached to a base 11, and two connecting pipes 23a and 23b are attached to the slider 22 in the front-rear direction. Wire outlets 5a and 5b attached to the downstream ends of the flexible tubes 4a and 4b described above are connected to the connecting pipes 23a and 23b in parallel in the horizontal direction in FIG. When the connecting pipes 23a and 23b are reciprocated in the lateral direction (vertical direction in FIG. 1) by the cylinder 21, they face the introduction pipe 16 alternately.

The welding torch 26 is moved by the robot arm, that is, the torch moving device 25 in the three axial directions of front and rear, left and right, and up and down, and the welding wire W1 (or W2) sent by the secondary feeding device 10 is transferred to the workpiece. Move along the set part. Moreover, when switching the welding wire W1 (or W2), the front-end | tip part of the said welding torch 26 is moved to the wire cutting apparatus 30 site | part.

The wire cutting device 30 is configured as shown in FIGS. Specifically, a fixed blade 32 having a V shape in plan view is fixed to the right end portion of the base 31, and a slider 35 reciprocated in the front-rear direction (left-right direction in FIG. 3) by a cylinder 34 is attached to the left portion of the base 31. A movable blade 33 having a V shape in plan view is attached to 35 so as to face the fixed blade 32. The movable blade 33 is moved in the direction of the fixed blade 32 by the cylinder 34, and the welding wire W1 (or W2) interposed between the both blades 33, 32 is cut.

In FIG. 1, reference numeral 40 denotes a control device that drives and controls the primary feeding device 2, the secondary feeding device 10, the wire switching device 20, the torch moving device 25, and the wire cutting device 30. As shown in FIG. 4, the control device 40 includes a switching recognition unit 41, a drive setting unit 42, a drive command unit 43, a timer 44, and the sensor 17 described above.

When the switching switch (not shown) of the welding wire W1 (W2) is turned on, the switching recognition unit 41 recognizes this and issues a switching signal to the drive setting unit 42. The drive setting unit 42 inputs signals from the switching recognition unit 41, the sensor 17, and the timer 44, and receives the primary feeding device 2, the secondary feeding device 10, the wire switching device 20, the torch moving device 25, and the wire cut. The driving order of the device 30 is set. The timer 44 is activated when the sensor 17 detects the arrival of a new welding wire W1 (or W2) in the introduction pipe 16, and the welding wire W1 (by the primary feeding device 2 and the secondary feeding device 10) ( Alternatively, the feeding time (feeding amount) of W2) is determined. That is, the operating time of the primary feeding device 2 and the secondary feeding device 10 is determined so that the tip of the new welding wire W1 (or W2) arrives at the tip of the welding torch 26. Yes.

The operation of the control device 40 is as shown in FIG. In FIG. 5, S <b> 1 to S <b> 15 indicate each step of the control device 40. First, when a start switch (not shown) for switching the welding wire W (W2) is turned on S1, a welding wire switching program is started in S2, and the primary feeding device 2A (or 2B) used in S3 is started. In this example, the primary feeding device 2A is determined. In S 4, the torch moving device 25 is operated to move the tip of the welding torch 26 to the wire cutting device 30, and the tip of the welding wire W 1 exposed from the welding torch 26 is fixed to the fixed blade 32 of the wire cutting device 30. And the movable blade 33.

Next, in S5, the wire cutting device 30 is operated, that is, the cylinder 34 is operated to move the movable blade 33 toward the fixed blade 32, and the tip of the welding wire W1 exposed from the welding torch 26 is removed. Next, in S6, the primary feeding device 2A and the secondary feeding device 10 are reversely rotated, that is, the motors M1a and M2 are reversely rotated to retract the welding wire W1 in the direction of the wire switching device 20.

When the sensor is turned off in S7, that is, when the welding wire W1 does not exist in the introduction pipe 16, the primary feeding device 2A and the secondary feeding device 10 are stopped in S8. Next, the wire switching device 20 is operated in S9. That is, the cylinder 21 is actuated to move the connecting pipes 23a and 23b in the lateral direction (downward in FIG. 1), and the connecting pipe 23b on the primary feeding device 2B side faces the introduction pipe 16 of the secondary feeding device 10. .

Next, in S10, the primary feeding device 2B and the secondary feeding device 10 are rotated forward. That is, the motors M1b and M2 are rotated forward to feed the welding wire W2 toward the welding torch 26. At this time, when the sensor 17 is turned on in S11, the timer 44 is turned on in S12. When the timer 44 is turned off in S13, the primary feeding device 2B and the secondary feeding device 10 are stopped, thereby bringing the tip of the welding wire W2 to the tip of the welding torch 26.

When the welding wire in the welding torch 26 is switched from W1 to W2 as described above, the welding wire switching program ends in S15. In the present invention, when there are two or more types of welding wires, the number of the connecting pipes 23 of the wire switching device 20 described above is two or more corresponding to the types of welding wires.

1 is a schematic view of an entire apparatus according to the present invention. It is a side view of the secondary feeder apparatus part by this invention. It is a top view of the wire cutting device by this invention. It is a block diagram of the control apparatus by this invention. It is a flowchart which shows operation | movement of the control apparatus by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Welding wire automatic switching device 2 Primary feeding device 3 Feeding roll 4 Flexible tube 5a, 5b Wire discharge port 10 Secondary feeding device 11 Base 12 Drive roll 13, 14 Feeding roll 16 Introducing pipe (wire introducing port)
17 Sensor 20 Wire switching device 21 Cylinder 22 Slider 23a, 23b Connecting pipe 25 Torch moving device 26 Welding torch 30 Wire cutting device 31 Base 32 Fixed blade 33 Movable blade 34 Cylinder 35 Slider 40 Controller 41 Switching recognition unit 42 Drive setting unit 43 Drive command unit 44 Timer M1a, M1b, M2 Motor W1, W2 Welding wire

Claims (1)

A plurality of primary feeding devices (2) for moving one welding wire in the feeding or winding direction are provided, and one welding wire is directed toward the welding torch (26) on the downstream side of the primary feeding device (2). A secondary feeding device (10) for moving in the unwinding or winding direction and a torch moving device (25) for moving the welding torch (26), and a wire discharge port of the primary feeding device (2) ( 5a, 5b) a wire switching device (20) for individually facing the wire introduction port (16) of the secondary feeding device (10), and a wire cut for cutting the welding wire exposed from the welding torch (26) A switching recognizing unit that includes a device (30) and a sensor (17) that detects the presence or absence of a welding wire at the wire introduction port (16) or the wire discharge port (5a, 5b), and inputs a welding wire switching signal. 41), and the signals of the switching recognition unit (41) and the sensor (17) are inputted to the primary feeding device (2), the secondary feeding device (10), the torch moving device (25), and the wire switching. A drive setting unit (42) for setting the drive order of the device (20) and the wire cutting device (30), and a signal from the drive setting unit (42) to input the primary feeding device (2), secondary A control device (40) having a drive command unit (43) for issuing a drive command to the feeding device (10), the torch moving device (25), the wire switching device (20), and the wire cutting device (30) is provided. An automatic welding wire switching device.

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