PRESS BRAKE ASSEMBLIES, TOOL HOLDER APPARATUSES, AND COMPONENTS THEREOF

摘要

A tool holder (10)) apparatus for a press brake is provided. The apparatus comprises a support plate (14) having a first receiving surface (34). A pivotable clamp (42) has an engagement portion (67) that is moveable toward the first receiving surface of the support plate by pivoting the clamp. The engagement portion(67) has therein formed a bore (93) in which a lifting shaft (75) is rotatably received. The engagement portion defines an opening communicating with the bore. The shaft has therein formed a notch(21) that is adapted to be engaged through the opening by an exterior corner of a forming tool (28). The notch is configured such that when the engagement portion of the clamp is forced against such tool, a first surface (123) of the exterior tool corner bears against a first surface (23) portion of the notch and causes the shaft to rotate within the bore, thereby bringing a second surface portion of the notch (27) to bear against a second surface (127) of the exterior tool corner and delivering to the tool a mounting force having a component normal to the second surface of the exterior tool corner.