Bending Machine For Wire Mesh Mats

Abstract

A bending machine for wire mesh mats, which comprise groups of longitudinal and transverse wires intersecting one another at right angles and welded together at intersecting points. The bending machine operates without a mat inverter and makes bending of the longitudinal and transverse wires of the wire mesh mat possible with both a positive and a negative bending angle.

1 . A bending machine for wire mesh mats, which have groups of longitudinal and transverse wires intersecting one another at right angles and welded together at intersecting points, the bending machine comprising:
 a machine base frame receiving bending devices;   an advancing device moving the wire mesh mat through the bending machine and having a central drive device for all the bending and advancing operations that is triggered by a program control device;   a row of bending pins spaced apart from one another is mounted on a beam-like receiving device braced on the machine base frame and extending in a transverse direction of the machine, the number of bending pins being equivalent at least to the number of longitudinal and transverse wires of the wire mesh mat that are to be moved simultaneously;   wherein the receiving device is adapted to be positioned in height under servo control by an associated hoisting device relative to the wire mesh mat advanced in a plane (E) of the wire mesh mat and is adjustable in the transverse direction of the machine by an associated displacement device, in order for the bending pins, as bending elements or as steadying elements, to be placed against and above or below the wires that are to be bent;   a second row of bending pins, associated with the first row of bending pins, is mounted on a second beam-like receiving device, extending in the transverse direction of the machine and braced on the machine base frame;   wherein the second receiving device is likewise adjustable in its height relative to the wire mesh mat by an associated hoisting device and adapted to be positioned in the transverse direction of the machine relative to the mesh mat wires by an associated displacement device, in order for the second bending pins to be placed, as steadying elements or as bending elements, against and above or below the wires be bent; and   a third receiving device, braced on the machine base frame, equipped with bending levers which hold bending rollers that are associated with the first and second bending pins, a beam-like bending lever holder, pivotably supported on a drive shaft, being configured to be put into a kinematic motion in such a way, via a crank mechanism driven by the drive shaft, that the bending rollers engaging the wire to be bent execute a circular motion at a predetermined bending angle about the respective bending pin row acting as a bending element, the third receiving device also being adjustable in its height relative to the wire mesh mat under servo control by an associated hoisting device.   
     
     
         2 . The bending machine of  claim 1 , wherein a reversing device for the bending levers is provided on the machine base frame, with which reversing device the positioning of the bending rollers relative to the respective bending pin row is effected. 
     
     
         3 . The bending machine of  claim 2 , wherein the reversing device is formed by a piston cylinder, whose piston rod is coupled on one end via a pitman to the bending lever holder and on the other via a connecting rod to the drive shaft. 
     
     
         4 . The bending machine of  claim 3 , wherein the hoisting device, embodied as a hydraulic cylinder, of each receiving device is in engagement via a sliding block with sliding block guides of the receiving device. 
     
     
         5 . The bending machine of  claim 4 , wherein, the receiving device is adjustable by the hoisting device to positive or negative bending angles for the bending rollers ( FIG. 1 ,  FIG. 3 ).