US 12,115,574 B2
Bending press and method for operating a bending press
Thomas Denkmeier, Traun (AT); and Christian Kurz, Linz (AT)
Assigned to TRUMPF Maschinen Austria GmbH & Co. KG, Pasching (AT)
Appl. No. 17/255,053
Filed by TRUMPF Maschinen Austria GmbH & Co. KG., Pasching (AT)
PCT Filed Jul. 25, 2019, PCT No. PCT/AT2019/060245
§ 371(c)(1), (2) Date Dec. 22, 2020,
PCT Pub. No. WO2020/019012, PCT Pub. Date Jan. 30, 2020.
Claims priority of application No. A 50659/2018 (AT), filed on Jul. 27, 2018.
Prior Publication US 2021/0121930 A1, Apr. 29, 2021
Int. Cl. B21D 5/04 (2006.01); B21D 5/02 (2006.01); B21D 55/00 (2006.01); F16P 3/00 (2006.01)
CPC B21D 5/04 (2013.01) [B21D 5/02 (2013.01); B21D 55/00 (2013.01); F16P 3/001 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A bending press for bending a workpiece, the bending press comprising:
a first platform with a first tool mount and a second platform with a second tool mount, wherein one of the platforms is movable relative to the other platform for performing a working movement,
a first safety device for creating a light barrier extending between the tool mounts transversely to the working movement of the movable platform, wherein the first safety device has a first mount and a second mount, wherein one of the mounts carries a light emitter and the other mount carries a light receiver, and wherein the first mount is arranged on a first side of the first platform and is adjustable relative to the first platform by a first adjustment drive,
a controller that is connected to the first adjustment drive,
wherein the first tool mount comprises a guide rail configured to receive a bending tool, the guide rail comprising a first end having a first front side opening for changing the bending tool,
wherein access for changing the bending tool via the first front side opening is obstructed in a first relative position of the first mount to the first platform and is unblocked in a second relative position of the first mount to the first platform,
wherein the first tool mount has a clamping device for fixating at least one bending tool inserted in the guide rail,
wherein the clamping device can be actuated between a clamping state and a releasing state,
wherein the clamping device is actuatable by the controller and/or the clamping device has a state readable by the controller, and
wherein, in an operating mode, the controller is configured to automatically move the first mount into the second relative position by controlling the first adjustment drive when the clamping device is brought into or is in a releasing state.