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AssigneePrecitec GmbH & Co. KG
InventorsBerthold Kessler, Bert Schurmann
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The invention concerns a method which can be carried out with a sensor device, for monitoring a laser machining operation to be performed on a work piece (12), in which for quality assurance with a local-resolution receiver assembly (10, 11, 14) a given field of observation (13) is selected in the region of the interaction zone between laser beam (25) and work piece (12), in which radiation coming from the selected field of observation (13) is detected with a radiation-sensitive receiver (10) which delivers an electrical signal corresponding to the detected radiation, in which the electrical signal is filtered in a signal processing circuit (16) in order to detect rapid and/or short, fault-related changes in intensity of the detected radiation, and in which the filtered electrical signal for the detection of faults during the laser machining operation.
Method for monitoring a laser machining operation to be performed on a work piece (12), in which the following steps are performed for quality assurance:
Method according to any of the preceding claims, characterised in that the filtered electrical signal is compared with stored values of a perfect machining operation in order to detect smaller faults such as small spittings or splashes as well as small holes.
Sensor device for monitoring a laser machining operation to be performed on a work piece (12), in particular for carrying out a method according to any of the preceding claims, with:
Dependencies are inferred from the claim text.