Bending angle measuring device and method for measuring a bending angle by means of the bending angle measuring device

摘要

The invention relates to a bending angle measuring device (23) comprising an illumination device (25) with at least one light source (26) and an optical detection means (29) having a light detecting surface (30). At the bending angle measuring device (23) is at least one rotationally symmetrical body (32) having a specular surface (33), wherein a central axis (34) of the rotationally symmetrical body (32) is arranged parallel to the bending edge aligned with one of the illumination device (25) is reflected emitted first light beam (37) from the sheet metal part (4) and passed as a second light beam (39) for the rotationally symmetrical body (32) and reflects the second light beam (39) on the rotationally symmetrical body (32) and as a third light beam (40) for optical detecting means (29), in particular on its light-detecting surface (30) is passed.