Patent EP-2420344-A1 (EP)
Inventor: LIEBEL MARTIN
IPC: B23K26/08
Filed: 2011-08-05
Abstract: The method of producing contour cut in a metal band continuously transported by a conveying device (3) in a transport direction, comprises: structuring the metal bands with respect to its width in three overlapping processing strips extending into the transport direction, where a first processing strip has a first width (B1), a second processing strip has a second width, and a third processing strip has a third width; and providing a first laser cutting device (10) assigned to the first processing strip whose first working area is limited by the first width. The method of producing contour cut in a metal band continuously transported by a conveying device (3) in a transport direction, comprises: structuring the metal bands with respect to its width in three overlapping processing strips extending into the transport direction, where a first processing strip has a first width (B1), a second processing strip has a second width, and a third processing strip has a third width; providing a first laser cutting device (10) assigned to the first processing strip whose first working area is limited by the first width and in the transport direction by a first length; providing a second laser cutting device (11) assigned to the second processing strip whose downstream or upstream at the first working area is subsequently limited by a second working area through the second width and in the transport direction by a second length; providing a third laser cutting device (12) assigned to a third processing strip whose third working area is limited by the third width and in the transport direction by a third length; controlling the first, the second and the third laser cutting devices such that a first part section of the contour cut is produced by the upstream laser cutting device and a second part section remaining to a completion of the contour cut is produced by a continuation of the first part section below from the downstream laser cutting device. The third working area of the third laser cutting device is located in a direction perpendicular to the transport direction adjacent to the first working area of the first laser cutting device. The first and second widths are smaller than the width of the metal bands. The second processing strip centrally extends itself, and the first and third processing strips overlap at an edge. A first breakthrough provided in the conveying device in alignment is rotatably moved on a first laser beam emitted by the laser cutting device so that the first laser beam is irradiated to the first breakthrough, where: a second breakthrough provided in the conveying device in alignment is rotatably moved on a second laser beam emitted by the second laser cutting device so that the second laser beam is irradiated to the second breakthrough; and a third breakthrough provided in the conveying device in alignment is rotatably moved on a third laser beam so that the third laser beam emitted by the third laser cutting device is irradiated to the third breakthrough. The conveying device comprises: a first transport device corresponding to the first processing strip and a second transport device subsequent in the transport direction; a third transport device parallely arranged to the first transport device corresponding to the second processing strip and a fourth transport device parallely arranged to the second transport device; and a fifth transport device parallely arranged to the third transport device corresponding to the third processing strip and a sixth transport device parallely arranged to the fourth transport device. The first breakthrough is formed between a first end of the first transport device and a second end opposite to the second transport device. The rotating movement of the first breakthrough is generated by a same direction movement of the first and second ends in or against the transport device. The second breakthrough is formed between a third end of the third transport device and a fourth end lying opposite to the fourth transport device. The rotating movement of the second breakthrough is generated by the same direction movement of the third and fourth ends in or against the transport device. The third breakthrough is formed between a fifth end of the fifth transport device and a sixth end lying opposite to the sixth transport device; and the rotating movement of the third breakthrough is generated by the same direction movement of the fifth and sixth ends in or against the transport device. The metal band is moved with a constant transport speed in the transport direction. The production of the contour cut is cut at one end of the first part section of a first arch deviating from a predetermined contour of the contour cut, where the second part section is utilized before the one end of the first part section and is performed in a second arch deviating from the predetermined contour. A transverse position of the metal band passing to the transport direction is adjusted so that the contour cut is produced with a minimum number of part cuts. An independent claim is included for a device for producing contour cut in a metal band.