A device for thermally coating a surface and method for measuring the position or shape of a wire end in a device for thermally coating a surface

摘要

Device for thermally coating a surface with a spray burner (2) comprising a wire feed device (4) with at least one guide element (10, 12) for guiding a wire (16), a plasma gas source, a nozzle device (6) with a nozzle opening (14) for producing a plasma jet, which is directed onto a wire end (18), a first electrode (20) and a second electrode (22), wherein the wire (16) acts as a second electrode (22), and an adjusting device (26), whereby the wire end (18) is adjustable by a defined adjustment. In such an embodiment, the adjustment path is estimated and aligned by repetitive adjustment of the wire relative to the plasma jet, whereby the adjustment of the wire end is very time consuming. According to the invention, it is therefore proposed that a measuring device (40) is provided which is fastened in a defined position on the spray burner (2), wherein the position or shape of the wire end (18) can be determined via the measuring device (40).