Machine For Bending Tubular Products and Tube Bending Machine

Abstract

A machine to bend tubular elements comprising bending means provided with a bending arm and a bend core disposed, when in use, inside said tubular element. The bend core comprises a support bar, a contrasting ogive and a possible bend-follower element disposed articulated at the head of the contrasting ogive. The machine also comprises movement means to move said tubular element in a direction toward said bending means and cutting means to cut a segment of tube. The machine comprises holding means disposed on the perimeter around said tubular element and configured to maintain said bend core in a condition of suspension inside said tubular element.

1 . A machine to bend tubular elements comprising bending means provided with at least a bending arm and a bend core disposed, when in use, inside said tubular element, the bend core comprising a support bar, a contrasting ogive and a possible bend-follower element disposed articulated at the head of the contrasting ogive, the machine also comprising movement means, to move said tubular element in a direction toward said bending means, and cutting means to cut a segment of tube, wherein it also comprises holding means disposed on the perimeter around said tubular element and configured to maintain said bend core in a condition of suspension inside said tubular element. 
     
     
         2 . The machine as in  claim 1 , wherein the movement means are of the type with an unwinding reel and the holding means are of the magnetic type and comprise at least a magnetic element disposed downstream of said unwinding reel in the direction and outside and around the tubular element, so as to generate a magnetic field cooperating with said support bar and to keep the bend core in magnetic suspension inside said tubular element. 
     
     
         3 . The machine as in  claim 2 , wherein said support bar is provided with a magnetic polarization. 
     
     
         4 . The machine as in  claim 2 , wherein said magnetic elements and said bend core define between them an interspace into which the tubular element is inserted around said bend core. 
     
     
         5 . The machine as in  claim 1 , wherein the feed means are of the combined type, with an unwinding reel and a movement gripper, and the holding means comprise a first gripping member, disposed on one side of the perimeter of the tubular element in cooperation with a first end of the bend core, in order to selectively keep said bend core in the suspended condition inside the tubular element during the feed steps of said tubular element in the direction of feed and toward said bending means, and a second gripping member, distanced longitudinally from said first gripping member, and disposed in cooperation with a second end of the bend core, and able to keep the bend core in the suspended condition inside the tubular element during the bending steps of said tubular element, in which the tubular element is moved by said grippers. 
     
     
         6 . The machine as in  claim 5 , wherein it comprises at least a cutting member disposed upstream and/or downstream of the gripping member with respect to the direction of feed, and able to divide the tubular element into segments of the desired length. 
     
     
         7 . A method to bend tubular elements comprising at least a bending step, in which bending means provided with at least a bending arm act on an external surface of said tubular element, and a bend core disposed inside said tubular element contrasts the action of said bending arm from the inside and conforms the bend of said tubular element in a desired manner, and at least a movement step in which movement means move said tubular element both to feed it toward said bending means and also during the bending step, wherein, both in said bending step and also in said movement step, said bend core is maintained in a condition of suspension inside said tubular element by means of holding means, disposed on the perimeter around said tubular element. 
     
     
         8 . The machine as in  claim 2 , wherein it comprises at least a cutting member disposed upstream and/or downstream of the gripping member with respect to the direction of feed, and able to divide the tubular element into segments of the desired length.