DE9100718U1 - Device for displaying the remaining wire quantity - Google Patents

Description

22.01.1991

WE/Su 91/1201G B

Thyssen Welding Technology GmbH, 4700 Hamm

Device for displaying the remaining wire quantity

The innovation concerns a device for displaying a remaining quantity of wire wound on a large spool while the wire is being unwound from the large spool.

Dry wire electrodes for partially and fully mechanized welding processes are increasingly being used on so-called large spools, e.g. barrel spools, with wire weights of 100 to 300 kg. The installation of such spools away from the welding station or the robot station makes it difficult to manually detect the amount of wire in stock. Automatic detection of a certain remaining quantity, which is sufficient to complete the welding work on the component that has begun, should be achieved with the help of a suitable device.

The prerequisite is a marking by applying paint or tarnish to the wire surface at a certain distance from the end of the rinsed wire. The marking is now detected by an optical device that detects a marking, in particular a paint marking, on the surface of the wire within a gap between the guide rollers for the wire. The optical device is connected to a signaling device that emits a signal when a marking is detected on the wire surface. The guide rollers ensure that the wire is guided vibration-free at a specified distance in front of the reading head of the measuring device.

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When the signal device is activated, the impending exhaustion of the wire supply is indicated. The remaining amount of wire electrode on the spool provides the opportunity to complete the welding of the component currently being processed. A new spool can then be set up to weld the next component.

According to a preferred embodiment of the device according to the invention, the optical device with the signaling device should be adjustable in terms of detection sensitivity and should have a timer. This ensures that the signaling device only responds when the optical device recognizes the intended marking with its characteristics of contrast intensity and marking length on the wire surface. In this way, it is ruled out that the optical device will also respond accidentally when there are other unintentional markings on the wire surface.

The innovation is explained in more detail using the drawing. Fig. 1 shows the device according to the innovation schematically.

Wire 7 is continuously drawn off a large spool 1, here a barrel spool, and guided to the welding point. The new device for displaying a remaining amount of wire 7 wound on the large spool 1 comprises the optical device 2 for detecting a marking k on the surface of the wire 7 and a signaling device 5 connected to it via a timing element 6. Guide rollers 3 ensure vibration-free guidance of the wire 7 in the area of the

The optical device 2 is directed at a wire section 8 between the guide rollers 3 and registers a mark 4 on the surface of the wire 7, which appears when only a certain amount of wire remains.

is wound on the spool &iacgr; to indicate the imminent emptying of the spool 1.

Claims (3)

Protection claims 1. Device for displaying a residual amount of wire (7) wound on a large spool (1) during the unwinding of the wire from the large spool, characterized by an optical device (2) which detects a marking (4), in particular a start-up marking, on the surface of a wire section (8) located between guide rollers (3) spaced apart in the direction of wire travel and is connected to a signaling device (5). 2. Device according to claim 1, tfacharacterized in that the optical device (2) is connected to the signaling device (5) via a timing element (6). 3. Device according to claim 1, jjlacharacterized in that the detection sensitivity of the ifiptical device (2) with the signaling device (5) and the timing element \ is adjustable.