Die for a bending or folding apparatus, and a bending or folding apparatus

Abstract

A die for a bending or folding device includes a base; at least one pair of bending beams mounted therein, symmetrical to a central plane, so as to pivot passively about axes, which form a flat rest surface in the base position and a V-shaped base cavity in the folding position; at least one return element for each beam acting on the beam towards base position; at least one slide for each beam. Two slides in each case rest on the beams in base position symmetrically to the central plane and form a flat rest surface for a workpiece with flat rest sections, which can slide transversely to the axis with a workpiece to be processed. A support is fixed on the slide, in base position and the slide rests on a base stationary support point and is free of force and lifted off the point in folding position.

1 . A die ( 1 ) for a bending or folding device, comprising a base body ( 2 ); at least one pair of bending beams ( 3 ), which are mounted in the base body ( 2 ), symmetrically with respect to a central plane (M) of the die ( 1 ), so as to be passively pivotable about axes (B) lying parallel to said central plane (M), and which in the base position form a flat rest surface ( 4 ) and in the folding position form a V-shaped die cavity in the base body ( 2 ); at least one return element ( 5 ) for each bending beam ( 3 ), which applies a force towards the base position to the bending beam ( 3 ); at least one sliding element ( 6 ) for each bending beam ( 3 ), wherein in the base position two sliding elements ( 6 ) in each case lie symmetrically to the central plane on the bending beams ( 3 ) and with flat rest sections form a flat, preferably closed rest surface for a workpiece parallel to the rest surface of the bending beams ( 3 ), and which are arranged in such a way that they can slide on the rest surface of the bending beam ( 3 ) parallel to the rest surface and transversely to the axis with a workpiece to be processed during the folding operation, wherein a widened edge section of each sliding element ( 6 ) projects further outwards away from the central plane over the outer edge of the bending beam ( 3 ) facing away from the central plane;
 comprising   a support section ( 9 ) that is rigidly attached to the sliding element ( 6 ), rests against a support point ( 11 ) on the base body ( 2 ) that is stationary during the folding operation when the bending beam ( 3 ) and the sliding element ( 6 ) are in the base position, and is lifted off the support point ( 11 ) and free of force when in the folding position.   
     
     
         2 . The die ( 1 ) according to  claim 1 , wherein the support section ( 9 ) is arranged being offset outside the plane of the rest section ( 7 ) of the sliding element ( 6 ) in the direction of the base body ( 2 ), and being offset parallel to the rest section ( 7 ) from the outermost edge of the rest section ( 7 ) of the sliding element ( 6 ) towards the central plane (M). 
     
     
         3 . The die ( 1 ) according to  claim 2 , wherein at least one connection section ( 10 ), preferably concave in the direction of the base body ( 2 ), extends between the outermost edge of the rest section ( 7 ) of the sliding element ( 6 ) and the support section ( 9 ). 
     
     
         4 . The die ( 1 ) according to  claim 3 , wherein the support section ( 9 ) is formed by an edge strip of the connection section ( 10 ) arranged perpendicular to the rest section ( 7 ). 
     
     
         5 . The die ( 1 ) according to  claim 4 , wherein a preferably adjustable limiting element ( 12 ) is arranged in the area of the linkage of the return element ( 5 ) on the bending beam ( 3 ), which defines the outermost position of the sliding element ( 6 ) on the bending beam ( 3 ). 
     
     
         6 . The die ( 1 ) according to  claim 5 , wherein the sliding elements ( 6 ) are attached to the bending beams ( 3 ) in a removable manner. 
     
     
         7 . The die ( 1 ) according to  claim 6 , wherein at least one mushroom-shaped fixing element ( 12 ) is arranged in the region of the linkage of the return element ( 5 ) on the bending beam ( 3 ), and that wherein at least one keyhole-shaped recess ( 15 ) is arranged in the region of the support section ( 10 ) of the sliding element ( 6 ), which recess ( 15 ) matches the fixing element ( 12 ) and thus interacts with it. 
     
     
         8 . The die ( 1 ) according to  claim 5 , wherein at least one retaining clip ( 16 ) is inserted in the area of the linkage of the return element ( 5 ) on the bending beam ( 3 ), to which retaining clip ( 16 ) the limiting element ( 12 ) and/or the fixing element is attached or can be attached. 
     
     
         9 . The die ( 1 ) according to  claim 8 , wherein the retaining clip ( 16 ) comprises a first section which has a receptacle, preferably a threaded bore, for the limiting element ( 12 ) and/or the fixing element, wherein the first section preferably runs parallel to the support section ( 9 ) of the sliding element ( 6 ), and wherein a second section of the retaining clip ( 16 ) has a connecting structure with the bending beam ( 3 ), preferably its spring anchor ( 3   a ). 
     
     
         10 . The die ( 1 ) according to  claim 9 , wherein the second section of the retaining clip ( 16 ) has a breakthrough through which the spring anchor ( 3   a ) of the bending beam ( 3 ) can be passed, wherein the second section runs essentially transversely to the first section. 
     
     
         11 . The die ( 1 ) according to  claim 10 , wherein the second section of the retaining clip ( 16 ) is located in the position of use between the bending beam ( 3 ) and a transverse bore for suspending the return element ( 5 ), and wherein preferably a fixing by means of the return element ( 5 ) suspended in the transverse bore is provided. 
     
     
         12 . A bending or folding device, comprising at least one die ( 1 ) with a base body ( 2 ) and at least one pair of bending beams ( 3 ), which bending beams ( 3 ) are mounted in the base body ( 2 ), symmetrically with respect to a central plane of the die ( 1 ), so as to be passively pivotable about axes (B) lying parallel to said central plane (M), and which in the base position form a flat rest surface ( 4 ) and in the folding position form a V-shaped die cavity in the base body ( 2 ); at least one return element ( 5 ) for each bending beam ( 3 ), which return element ( 5 ) applies a force towards the base position to the bending beam ( 3 ); at least one sliding element ( 6 ) for each bending beam ( 3 ), wherein in the base position two sliding elements ( 6 ) in each case lie symmetrically to the central plane (M) on the bending beams ( 3 ) and with flat rest sections ( 7 ) form a flat, preferably closed rest surface for a workpiece (W) parallel to the rest surface ( 4 ) of the bending beams ( 3 ), and which are arranged in such a way that they can slide on the rest surface of the bending beam ( 3 ) parallel to the rest surface ( 4 ) and transversely to the axis (B) with a workpiece (W) to be processed during the folding operation, wherein a widened edge section of each sliding element ( 6 ) projects further outwards away from the central plane (M) over the outer edge of the bending beam ( 3 ) facing away from the central plane (M); and at least one punch ( 17 ) movably arranged along the central plane (M) for exerting a pressure-pushing force on a workpiece (W) resting on the bending beams ( 3 ) and the sliding elements ( 6 ), thereby causing the bending beams ( 3 ) to pivot and simultaneously bending the workpiece (W) along a bending line lying in the central plane (M),
 wherein   at least one die ( 1 ) is formed according to  claim 1 .   
     
     
         13 . The device according to  claim 12 , wherein multiple dies ( 1 ) are arranged in a row in a longitudinal direction with a common central plane (M), for bending a workpiece (W) that is longer than a single die ( 1 ),
 wherein   at least one sliding element ( 6 ) is longer than a single die ( 1 ), preferably the same length as or longer than the workpiece (W).