JPH0312454Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is to check whether the welding robot's torch is misaligned with respect to the starting point of welding when welding can assemblies, etc. using a welding robot. Regarding equipment.

[Conventional technology]

When welding can assemblies, etc. using a welding robot, it is necessary to align the torch of the welding robot with the origin of welding in order to avoid welding defects. It is necessary to check whether there is any deviation.

Conventionally, a punch mark is engraved at the welding start point of the welding object, and the welding robot is taught the operation of moving the torch to check whether the torch is misaligned with the punch mark. During welding, the above operation is performed to check whether the torch is deviated from the origin at which welding starts.

[Problem that the invention attempts to solve]

In the above conventional technology, when starting welding, unless a pre-programmed confirmation operation is executed, it is impossible to confirm whether the welding robot's torch is deviated from the welding start origin, and the operator has to complete the confirmation. must be present until then. Additionally, if the worker is engaged in other work and neglects to check the above, there is a risk that welding will start even though the torch is off the welding starting point, resulting in defective welding. There is.

The purpose of this invention is that when checking whether the torch of a welding robot is misaligned with the welding start origin, there is no need for a worker to be present until the confirmation is completed, and the torch is at the welding start origin. It is an object of the present invention to provide a torch origin deviation confirmation device for a welding robot that can prevent welding defects by preventing welding from starting if the welding point deviates from the welding robot.

[Means for solving problems]

The above object includes a main body frame, a plate rotatably attached to the main body frame with a horizontal pin as a fulcrum, and a plate provided on the base end side of the plate.
A means for holding the plate in a horizontal state, a torch insertion hole provided at the distal end of the plate, and a means installed at the proximal end of the plate of the main body frame, which is activated when the plate comes into contact with the plate as it rotates. This is achieved by having a detector that outputs a stop signal to the welding robot, the torch insertion hole being selected to have a diameter slightly larger than the outside diameter of the torch, and being provided at a position that coincides with the origin of the welding start. be done.

[Effect]

To start welding, a plate is interposed between the torch of the welding robot and the object to be welded, and the torch is moved toward the torch insertion hole of the plate.
At this time, if the torch and the welding start origin of the object to be welded coincide with each other, the torch is inserted into the torch insertion hole and the plate is held in a horizontal state.
Furthermore, if the torch is misaligned with respect to the welding starting point, the torch interferes with the plate, the plate rotates about the horizontal pin, and its base end contacts the detector, causing the detector to operate. As a result, a stop signal is output from the detector and the operation of the welding robot is stopped. Therefore, there is no need for the worker to be present until the torch origin has been checked for misalignment, and if the torch is misaligned from the welding starting origin, welding will not start, so it is possible to prevent welding defects. It can be prevented.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. FIG. 1 shows a front view of a torch origin deviation checking device according to the present invention, and FIG. 2 shows a plan view thereof. In the figure, this device includes a main body frame 1 and a bracket 1a of the main body frame 1.
A plate 2 is attached to the plate 2 so as to be rotatable about a horizontal pin 3 as a fulcrum, and a plate 2 is attached to the lower surface of the proximal end of the plate 2, and the plate 2 is held in a horizontal state by adhering to an adsorption surface 1b formed on the main body frame 1. A magnet 4, a torch insertion hole 5 provided on the distal end side of the plate 2, and a torch insertion hole 5 provided on the base end side of the plate 2 of the main body frame 1 are installed, and when the plate 2 rotates and comes into contact with the plate 2, it is activated and welds. A detector 6 is provided to output a stop signal to a robot (not shown). The torch insertion hole 5 has a hole diameter _D2 that is slightly larger (approximately 2.00 mm) than the outer diameter _D1 of the welding robot's torch 7, and is located at the origin of welding of the welded object (both not shown). are located in matching positions.

Next, the operation of this embodiment will be explained. To start welding, the plate 2 is interposed between the torch 7 of the welding robot and the object to be welded, and the torch 7 is moved toward the torch insertion hole 5 of the plate 2. At this time, if the welding start point of the torch 7 matches the welding start point of the workpiece, the torch 7 is inserted into the torch insertion hole 5 as shown by the imaginary line in FIG.
Plate 2 remains held horizontally.
Furthermore, if the torch 7 is misaligned with the welding starting point, the torch 7 will interfere with the plate 2, and as shown in FIG. 3, the plate 2 will rotate about the horizontal pin 3 and the base end will become 6 and the detector 6 is activated. As a result, a stop signal is output from the detector 6, and the operation of the welding robot is stopped.

Therefore, in this embodiment, there is no need for the worker to remain on the spot until after checking for the torch origin deviation, and if the torch 7 is misaligned with the welding start origin, the welding robot will stop. Therefore, welding defects can be prevented. Furthermore, in this embodiment, when the welding robot stops because the torch 7 is misaligned with the welding starting point, it is possible to notify the worker at a remote location by making a notification (by sounding an alarm bell, etc.). is also possible.

In the above embodiment, the magnet 4 is used as a means for holding the plate 2 in a horizontal state, but a weight may be used instead.

[Effect of idea]

As explained above, according to the present invention, when checking whether the torch of a welding robot is misaligned with respect to the starting point of welding, the worker is required to remain at the spot until the check is completed. Moreover, if the torch is misaligned with the welding start origin, the welding robot will stop and welding will not start, so welding defects can be prevented.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of the welding robot torch origin deviation fixing device of the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is an operational view. 1... Body frame, 1b... Magnet attraction surface,
2...Plate, 3...Horizontal pin, 4...Magnet,
5...Torch insertion hole, 6...Detector, 7...Welding robot torch.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A device for checking whether or not the torch of the welding robot is deviated from the welding starting point when welding is performed by a welding robot, which includes a main body frame and a plate rotatably mounted about a horizontal pin as a fulcrum; means provided on the proximal end of the plate to hold the plate in a horizontal state; a torch insertion hole provided on the distal end of the plate; A detector is installed on the base end side of the plate of the main frame, and is activated when the plate rotates and comes into contact with the plate to output a stop signal to the welding robot, and the torch insertion hole is larger than the outside diameter of the torch. 1. A torch origin deviation confirmation device for a welding robot, characterized in that the hole diameter is selected to be slightly larger and the device is installed at a position that coincides with the welding start origin. 2. The utility model registration claim 1, wherein the means for holding the plate in a horizontal state is constituted by a magnet, and is adapted to hold the plate horizontally by adhering to an adsorption surface formed on the main body frame. A device to check the origin deviation of the torch of a welding robot.