Patent ID: 7584640

Claim:
A press brake tool for bending a workpiece, the tool comprising: a punch having a punch tip; a press brake die including a pair of rotary members and at least one elastic member, and the press brake die defining an elongated lateral groove facing the punch tip and at least one longitudinal through hole communicating with the lateral groove, the pair of rotary members spaced from each other and rotatably received in the elongated lateral groove, the at least one elastic member received in the at least one longitudinal through hole and abutting the pair of the rotary members; and a die holder fixing the die thereto; wherein the elongated lateral groove includes a recessed portion with a W-shaped extremity, and two C-shaped sub-grooves respectively disposed at opposite sides of the recessed portion and communicating with the recessed portion; each rotary member includes a curved portion rotatably received in a corresponding C-shaped sub-groove and an elongated contact portion integrated with the curved portion; the elongated contact portion includes a smooth upper surface smoothly contacting the workpiece and a lower surface opposite to the upper surface abutting the elastic members and subsequently received in the recessed portion when the workpiece is bent.