Synova Sa

Benjamin Carron

Bernold Richerzhagen

Ronan Martin

Annika Richmann

Florent Bruckert

Grigore Suruceanu

Stephane Delahaye

Yury Kuzminykh

The invention concerns a process for treating a workpiece, preferably for shaping a workpiece by ablating material, by a liquid jet guided laser beam. The process comprises the following steps: Production of a liquid jet by a nozzle; impinging the liquid jet on a reference surface allocated to the workpiece, whereby an intersection of the liquid jet with the reference surface defines a liquid jet-footprint; effecting a displacement between the liquid jet and the reference surface, whereby the liquid jet-footprint evolves to a trace along a trajectory associated with the trace during the time frame, wherein the trace covers a trace-area; irradiating the workpiece at least during part of the time frame with a laser beam coupled into the liquid jet, preferably for ablating material such that the trace has at least one overlap-area, wherein each of the at least one overlap-areas is defined by an associated common area of an associated second length-section of the trace and an associated first length-section of the trace and wherein the workpiece is irradiated by the laser beam along at least one of the length-sections. It concerns further a computerized numerical control (CNC) program for controlling a liquid jet guided laser machining device and a computer readable medium containing such a CNC program. Further, it contains a computer program for generating the above mentioned CNC program. Finally the invention concerns a liquid jet guided laser machining device to perform the above mentioned process.

Process of treating a workpiece using a liquid jet guided laser beam

A process for providing a protection against damages in a machine head is claimed. The process comprises the following steps: First a blind steel plate (protection plate) is fixed to a protection chamber (). Then the transparent liquid jet (WJ) guided laser beam (LB) is started, which drills a transit-hole into it. This protection plate () has the transit-hole () precisely arranged on the optical axis. Therefore no further alignment is required. Further an apparatus for treating a work piece by means of a laser beam (LB) which is guided in a transparent liquid jet (WJ) is claimed. The apparatus comprises a protection chamber () mounted on the output () of a coupling unit (CU) and a protection plate () replaceable fixed to the first chamber () protecting the outlet () of the first chamber () from sputtered debris.

Method and apparatus for improving reliability of a machining process

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Savigny, Switzerland

Benjamin Carron