US 12,214,403 B2
Method and device for determining a bending angle on a bending machine
Kevin Scharfenberg, Großrettbach (DE)
Assigned to BYSTRONIC LASER AG, Niederönz (CH)
Appl. No. 18/282,516
Filed by Bystronic Laser AG, Niederönz (CH)
PCT Filed Mar. 24, 2022, PCT No. PCT/EP2022/057742
§ 371(c)(1), (2) Date Sep. 16, 2023,
PCT Pub. No. WO2022/200488, PCT Pub. Date Sep. 29, 2022.
Claims priority of application No. 21164938 (EP), filed on Mar. 25, 2021.
Prior Publication US 2024/0157425 A1, May 16, 2024
Int. Cl. B21D 5/00 (2006.01); B23Q 15/12 (2006.01); B23Q 15/26 (2006.01); B23Q 17/24 (2006.01); G01B 11/16 (2006.01); G01B 11/25 (2006.01); G01B 11/26 (2006.01)
CPC B21D 5/006 (2013.01) [B21D 5/004 (2013.01); B23Q 15/12 (2013.01); B23Q 15/26 (2013.01); B23Q 17/249 (2013.01); B21D 5/002 (2013.01); G01B 11/167 (2013.01); G01B 11/2513 (2013.01); G01B 11/2545 (2013.01); G01B 11/26 (2013.01); G05B 2219/37403 (2013.01); G05B 2219/37571 (2013.01); G05B 2219/39045 (2013.01); G05B 2219/45143 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for determining bending angles on a bending machine, wherein the bending machine comprises an upper tool and a lower tool configured to form a workpiece arranged between the upper tool and the lower tool by bending along a bending line of the workpiece, wherein one or more measuring arrangements are positioned on the bending machine, each measuring arrangement including at least one illumination device and at least one acquisition device, and wherein each measuring arrangement is assigned a different surface portion of the workpiece which lies laterally adjacent to the bending line and extends along the bending line, the method comprising the steps of:
imaging a light pattern on the workpiece by means of each illumination device onto a corresponding one of the surface portions, wherein each light pattern comprises a plurality of zones arranged side by side along the bending line, the plurality of zones are arranged immediately adjacent side by side such that each light pattern covers the corresponding surface portion;
acquiring each light pattern by means of the at least one image acquisition device wherein image information of each light pattern is obtained;
identifying each zone from the image information by means of an evaluation device;
determining a bending angle caused by bending within each zone, wherein each bending angle is determined for each zone along an entirety of the bending line of the workpiece without contact and without mechanical movement of each measuring arrangements.