Machine for bending tubes with small diameter
AssigneeRobolix
InventorPhilippe Jaubert
Life of this patent
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Abstract
A machine for bending tubes (1) with small diameters, which are pre-cut and provided with connection systems at both ends. This machine comprises elements (5) for grasping the rear end of the tube (1), elements for entrainment of the grasping elements according to a longitudinal axis, and at least one bending head, comprising two forming rollers (7, 8), each of which has at least one peripheral groove, a folding finger (23), which is associated with a unit (24) for displacement according to a circular path which is centered on an axis (Y) at right-angles to the axis (X), and with a system (29) for displacement in translation according to an axis (Y1) which is parallel to (Y), and guide units for the tube (1), which are disposed upstream and in the vicinity of the forming rollers (7, 8).
Claims16
A bending machine for bending tubes with small diameters, which are pre-cut such as to have a predetermined length, and are provided with connection systems at both ends, the bending machine comprising:
- a frame, on which there is mounted at least one bending head, and means for longitudinal displacement of the tube relative to the frame along a longitudinal axis (X), wherein:
- the means for longitudinal displacement comprise means for grasping the rear end of the tube, and means for entrainment of the grasping means along the longitudinal axis (X);
- each bending head comprises:
- two forming rollers, each of which has at least one peripheral groove with a semi-circular cross-section, which, in a coupled position of the rollers, is designed to form a guide duct having a neck with a diameter which is substantially larger than that of the tube;
- means for relative displacement of the forming rollers, which can position the rollers either in their coupled position, or in an open position which permits passage of the tube along a first axis which is perpendicular to the longitudinal axis (X);
- a folding finger disposed downstream and in the vicinity of the forming rollers;
- means for displacement of the folding finger along a circular path which is centered on a second axis (Y) at right angle to the longitudinal axis (X);
- means for displacement in translation of the folding finger along a third axis (Y1) which is parallel to the second axis (Y);
- and
- guide units for guiding the tube, disposed on both sides of the longitudinal axis (X), such as to come into contact with the tube upstream and in the vicinity of the forming rollers;
- said guide units being structured and arranged to retract transversely, under the effect of a longitudinal force exerted by the grasping means.
A bending head for a machine for bending pre-cut tubes with a small diameter, which are provided with connection systems at both ends, the bending head comprising:
- two forming rollers each of which having at least one peripheral groove with a semi-circular cross-section, which, in a coupled position of the rollers, is designed to form a guide duct which is centered according to a longitudinal axis (X), and has a neck with a diameter which is substantially larger than that of the tube;
- means for relative displacement of the forming rollers, which can position the roller either in their coupled position, or in an open position which permits passage of the tube along a first axis which is perpendicular to the longitudinal axis (X);
- a folding finger disposed upstream and in the vicinity of the forming rollers;
- means for displacement of the folding finger along a circular path which is centered on a second axis (Y) at right angles to the longitudinal axis (X);
- means for displacement in translation of the folding finger along a third axis (Y1) which is parallel to the second axis (Y);
- and
- guide units for guiding the tube disposed on both sides of the longitudinal axis (X), such as to come into contact with the tube upstream and in the vicinity of the forming rollers;
- said guide units being structured and arranged to retract transversely under the effect of a longitudinal force exerted by a grasping means.
Dependencies are inferred from the claim text.