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Draw-bending machine

  • US 20030061853A1
  • Filed: 09/17/2002
  • Published: 04/03/2003
  • Est. Priority Date: 10/02/2001
  • Status: Active Grant
First Claim
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1. 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 one (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 a first (27) and a second (28) clamps aligned along a first alignment direction (P) to tighten the pipe (6) to be bent at two regions spaced apart from each other.

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