JPH0114398Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a welding wire supply device for a consumable electrode type automatic arc welding machine, and is capable of informing an operator when to efficiently connect preliminary welding wire. The present invention relates to a welding wire remaining amount detection device.

(Prior art) A consumable electrode type automatic arc welding machine is equipped with a wire feeding device that feeds a welding wire at a constant speed, and generally has a configuration in which the welding wire is inserted and guided through a conduit tube leading to the tip of the welding torch. has been done.

By the way, as a practical problem when working with this type of welding machine, there is the problem of so-called "wire breakage." In other words, if the welding wire is used up during welding, a new welding wire must be set in the supply device and re-welded, which requires a lot of effort and time. .

For this reason, in the past, a means for detecting the end of the welding wire was provided to stop the cycle with one cycle's worth of welding wire remaining in the conduit tube, thereby solving the problem of "wire breakage" mentioned above. It was seen as a means to solve the problem. That is, a method has been adopted in which the detection means is used to stop the cycle of the welding machine and prompt the operator to connect the preliminary welding wire.

This conventional method certainly works effectively when welding a certain length repeatedly because the amount of welding wire used in one cycle is constant, and the operator can use new welding wire. This eliminates the need for resetting the material into the supply device, and also eliminates the need for re-welding.

However, conventional means prevent “wire breakage” by stopping the welding machine cycle.
In order to solve this problem, the welding operation must necessarily be stopped while the operator connects the preliminary welding wire. Furthermore, with the recent spread of industrial robots, when arc robots are used to produce different weld lengths in lots, the use of welding wire is not constant, and the welding wire is often used up to the end, which is the problem mentioned above. As a result, the welding operation has to be stopped and a new welding wire must be inserted into the conduit cable, set into the feed motor, and then reinstalled into the welding wire supply device. In addition to being forced to do so, it also resulted in lost time until work could be resumed, which was a major problem that reduced Ark Robot's productivity.

(Technical Problem to be Solved by the Invention) A technical problem to be solved by the invention is to provide a means for efficiently connecting preliminary welding wires in an automatic arc welding machine. In other words, it has been recognized that the most efficient method is to warn the operator that it is time to connect the wire while leaving enough welding wire to match the welding length, and connect the preliminary welding wire during operation. Based on this, a welding wire remaining amount detection device is provided as a simple and specific means for this purpose.

(Means for Solving the Problems) In order to achieve the above technical problem, such a device includes a proximity switch whose detection body is a welding wire housed in a drum-shaped wire pack, and a proximity switch that holds the proximity switch. The device is comprised of a mounting bracket and a belt extending from the mounting bracket around the drum-shaped wire pack to detachably attach the proximity switch to the outer peripheral surface of the drum-shaped wire pack.

(Function/Effect) Therefore, the operator can determine when to connect the wire by simply installing the device according to the present invention at a height where the amount of welding wire remaining in the drum-shaped wire pack is preferable for wire connection. Therefore, the pre-welding wire can be connected while the equipment is in operation.

That is, according to the present invention, it is possible to easily and freely set the remaining amount of welding wire at the time of wire connection using a simple device, and therefore, the preliminary welding wire can be connected without stopping the work. It has high practical value as a simple means to solve the practical problem of consumable electrode automatic arc welding machines, that is, the problem of wire breakage, and especially as an efficient means for solving the problem in arc robots.

(Example) An embodiment of the present invention will be described based on the drawings.

Welding wire remaining amount detection device 1 given as an example
0 has a known proximity switch 1 which is held in a mounting bracket 2. The mounting bracket 2 is bent into a U-shape, and the proximity switch 1 is mounted through the mounting bracket 2 in the center thereof.
Belts 3 and 4 are provided on both sides of the mounting bracket 2, with one belt 3 having a fastener 5 and the other belt 4 having a plurality of fastening holes 6 spaced apart in the length direction thereof. , 6, ... are provided.

Welding wire remaining amount device 10 having the above configuration
As shown in FIG. 3, belts 3 and 4 are wound around the outer peripheral surface of a paper-shaped drum-shaped wire pack 12 containing a welding wire 11 and attached thereto. Figure 2 shows a cross section of the installed state.As shown in Figure 2, the proximity switch 1 is installed through the center of the mounting bracket 2, which is bent into a U-shape. wire pack 12
The proximity switch 1 attached to the outer peripheral surface of the drum-shaped wire pack 12 is arranged in the radial direction of the drum-shaped wire pack 12.
The welding wire 11 housed in the welding wire 2 acts as a detection object.

This proximity switch 1 is connected to an advance notice control panel (not shown), and when the proximity switch 1 is turned OFF (or ON), a warning light is turned on to notify the operator that it is time to weld the wire. In FIG. 3, 13 is a welding torch, 14 is a conduit cable, 15 is a guide roller, and 16 is a limit switch as a conventional wire end detection means.

When the amount of welding wire 11 in the wire pack 12 gradually decreases to the amount remaining at the position set by the proximity switch 1, the proximity switch 1 detects this through the paper wire pack and displays a warning light to indicate when to connect the wire. .

Adjustment of the wire connection timing, that is, adjustment of the detection timing of the proximity switch 1, is performed by mounting the detection device 10 on the drum-shaped wire pack 12 and then moving it up and down to set it to an arbitrary height. and,
The operator, who has learned from the warning light that it is time to connect the wires, connects the preliminary welding wire and then reinstalls the detection device 10 into the wire pack containing the preliminary welding wire. These series of wire connection operations can be performed while the equipment is in operation.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the embodiment, Fig. 2 is a partial sectional view of the embodiment mounted on a drum-shaped wire pack,
FIG. 3 is a schematic overall view from the drum-shaped wire pack to the welding torch. 10... Welding wire remaining amount detection device, 1... Proximity switch, 2... Mounting bracket, 3, 4...
Belt, 11...Welding wire, 12...Drum-shaped wire pack.

Claims (1)

[Scope of Claim for Utility Model Registration] A proximity switch whose sensing object is a welding wire housed in a drum-shaped wire pack; a mounting bracket for holding the proximity switch; and a mounting bracket extending from the mounting bracket around the drum-shaped wire pack. , a belt to which the proximity switch is detachably attached to the outer peripheral surface of a drum-shaped wire pack.