Patent ID: 6694794
Filing Date: 2004-02-24
Classification: B21D,B23Q

Abstract:
A draw-bending machine comprising:a base frame (2); a bending head (3) movably in engagement with the base frame (2) and including at least one bending die (4) rotatable about a bending axis (Z); a support and positioning device (9) of said at least one bending head (3), said support and positioning device (9) being linked to the base frame (2); handling and locking means (51) for a pipe (6) to be bent; the support and positioning device (9) of said at least one bending head (3) presenting: a first support arm (10) movably in engagement with the base frame (2), said first support arm (10) having a first end (10a) and a second end (10b) opposite to the first end (10a); first actuating means (11) of the first support arm (10); second actuating means (12) of the first support arm (10); a second support arm (17) having a first end (17a) hinged on the first end (10a) of the first support arm (10) at a first articulation axis (J) and a second end (17b) hinged on the bending head (3) at a second articulation axis (K); third actuating means (18) of the second support arm (17) around the first articulation axis (J); fourth actuating means (19) of the bending head (3) around the second articulation axis (K); the draw-bending machine being characterized in that the handling and locking means (51) for the pipe (6) to be bent comprises a first gripping unit (25) having first (27) and second (28) clamps aligned along a first alignment direction (P) spaced along the axis of the pipe to tighten the pipe (6) to be bent at two regions spaced apart from each other.