OPTICAL SAFETY DEVICE FOR PRESS BRAKES, PRESS BRAKE, AND OPTICAL MONITORING METHOD

OPTICAL SAFETY DEVICE FOR PRESS BRAKES, PRESS BRAKE, AND OPTICAL MONITORING METHOD

A determination part 70 determines whether or not a shadow of an upper mold 12 is expanded to a photodiode 564 by laser beam B projected to a light receiver 52 side based on a light receiving state of a photodiode 564 positioned in a vicinity of the upper mold 12. When it is determined that the shad...

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Bibliographische Detailangaben
1. Verfasser: MATSUURA, Kento
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL
PERFORMING OPERATIONS
PRESSES
PRESSES IN GENERAL
PUNCHING METAL
TRANSPORTING
WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL
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Zusammenfassung:A determination part 70 determines whether or not a shadow of an upper mold 12 is expanded to a photodiode 564 by laser beam B projected to a light receiver 52 side based on a light receiving state of a photodiode 564 positioned in a vicinity of the upper mold 12. When it is determined that the shadow of the upper mold 12 is expanded to the photodiode 564 positioned in the nearest vicinity of the upper mold 12, the invalidation unit 72 invalidates the photodiode 564. A detection unit 74 detects a presence or absence of a foreign body between the upper mold 12 and a lower mold 14 based on light receiving states of the effective plurality of photodiodes 56 during a lowering operation of an upper table 26.