Device for pre-tensioning a machine frame, machine frame, and pressing and drawing device

Abstract

A device for pre-tensioning a machine frame has a tie rod including a first and a further rod head for placement on the machine frame and a tension element for absorbing tensile forces between the rod heads. The tension element extends along a tension distance of the tie rod. At least one of the two rod heads includes a device for reversing the direction for the tension element. In further aspects, a machine frame and a pressing or drawing device are provided.

1 . Device ( 20 ) for pre-tensioning a machine frame ( 50 ), having a tie rod ( 21 ) comprising a first and a further rod head ( 22 ,  23 ) for placement on the machine frame ( 50 ) and comprising a tension element ( 24 ) for absorbing tensile forces between the rod heads ( 22 ,  23 ), whereby the tension element ( 24 ) extends along a tension distance ( 25 ) of the tie rod ( 21 ), wherein at least one of the two rod heads ( 22 ,  23 ) comprises a device ( 26 ) for reversing the direction for the tension element ( 24 ). 
     
     
         2 . Pre-tensioning device ( 20 ) according to  claim 1 , wherein the two rod heads ( 22 ,  23 ) comprise a device ( 26 ) for reversing the direction for the tension element ( 24 ). 
     
     
         3 . Pre-tensioning device ( 20 ) according to  claim 1 , wherein at least one of the rod heads ( 22 ,  23 ) has a deflection region ( 30 ) for the tension element ( 24 ), which region is configured in convex shape. 
     
     
         4 . Pre-tensioning device ( 20 ) according to  claim 3 , wherein rod heads ( 22 ,  23 ), have a deflection region ( 30 ) for the tension element ( 24 ), which region is configured in convex shape. 
     
     
         5 . Pre-tensioning device ( 20 ) according to  claim 1 , wherein both ends of the tie rod ( 24 ) are attached to a single one ( 23 ) of the two rod heads ( 22 ,  23 ). 
     
     
         6 . Pre-tensioning device ( 20 ) according to  claim 1 , wherein one ( 23 ) of the two rod heads ( 22 ,  23 ) has a device ( 31 ) for accommodating an attachment device ( 32 ) of the tension element ( 24 ). 
     
     
         7 . Pre-tensioning device ( 20 ) according to  claim 1 , wherein the rod heads ( 22 ,  23 ) of the tie rod ( 21 ) are configured asymmetrically. 
     
     
         8 . Pre-tensioning device ( 20 ) according to  claim 1 , wherein at least one of the rod heads ( 22 ,  23 ), preferably both rod heads ( 22 ,  23 ), comprise(s) contact surfaces ( 39 ) for a tensioning element ( 37 ,  38 ) of the tie rod ( 21 ), on the support side. 
     
     
         9 . Pre-tensioning device ( 20 ) according to  claim 8 , wherein the contact surfaces ( 39 ) are configured in concave shape. 
     
     
         10 . Pre-tensioning device ( 20 ) according to  claim 1 , wherein the tension element ( 24 ) is disposed so that it is turned around at least one of the two rod heads ( 22 ,  23 ). 
     
     
         11 . Pre-tensioning device ( 20 ) according to  claim 1 , wherein the tension element ( 24 ) is disposed on both sides of at least one of the two rod heads ( 22 ,  23 ). 
     
     
         12 . Pre-tensioning device ( 20 ) according to  claim 1 , wherein the tension element ( 24 ) has more than one tension segment ( 27 ) that acts between the rod heads ( 22 ,  23 ). 
     
     
         13 . Pre-tensioning device ( 20 ) according to  claim 1 , wherein tension element ( 24 ) is disposed so that it is passed from the first rod head ( 22 ) to the further rod head ( 23 ) and back multiple times. 
     
     
         14 . Pre-tensioning device ( 20 ) according to  claim 1 , wherein the tension element ( 24 ) is disposed so that it is passed along the tension distance ( 25 ) at least twice, preferably multiple times. 
     
     
         15 . Pre-tensioning device ( 20 ) according to  claim 1 , wherein tension element ( 24 ) has a length that amounts to a multiple of the tension distance ( 25 ). 
     
     
         16 . Pre-tensioning device ( 20 ) according to  claim 1 , wherein the tension element ( 24 ) has more than one tension distance section region ( 28 ) along the tension distance ( 25 ), so that tensile forces that act on the tension element ( 24 ) are distributed over multiple tension segments ( 27 ) of the tension element ( 24 ). 
     
     
         17 . Pre-tensioning device ( 20 ) according to  claim 1 , wherein the tension element ( 24 ) is configured as a tension cable ( 29 ), particularly as a steel cable. 
     
     
         18 . Pre-tensioning device ( 20 ) according to  claim 1 , wherein the tension element ( 24 ) is configured so that it can be rolled up. 
     
     
         19 . Pre-tensioning device ( 20 ) according to  claim 1 , wherein the tension element ( 24 ) is configured as an endless tension cable. 
     
     
         20 . Pre-tensioning device ( 20 ) according to  claim 1 , wherein the tie rod ( 21 ) has more than one tension element ( 24 ). 
     
     
         21 . Pre-tensioning device ( 20 ) according to  claim 1 , wherein the tie rod ( 21 ) is variably adjustable in its height. 
     
     
         22 . Pre-tensioning device ( 20 ) according to  claim 1 , wherein the tie rod ( 21 ) has a working height and at least one further height, such as a transport height and/or an installation height, whereby the further height can amount to less than one-third or less than half of the working height. 
     
     
         23 . Pre-tensioning device ( 20 ) according to  claim 1 , wherein the pre-tensioning device ( 20 ) comprises at least two tie rods ( 21 ), preferably four tie rods ( 21 ). 
     
     
         24 . Pre-tensioning device ( 20 ) according to  claim 1 , wherein the pre-tensioning device ( 20 ) comprises a device ( 35 ,  36 ) for tensioning the tie rod ( 21 ), and the device ( 35 ,  36 ) for tensioning has a wedge-shaped tensioning element ( 37 ), preferably two wedge-shaped tensioning elements ( 37 ,  38 ). 
     
     
         25 . Machine frame ( 50 ), having an upper crosshead ( 51 ) and a lower crosshead ( 52 ) for absorbing processing forces introduced into the machine frame ( 50 ), having frame elements ( 53 ) for spacing the crossheads ( 51 ,  52 ) apart from one another, and having at least one tie rod ( 21 ) that acts between the crossheads ( 51 ,  52 ), in which the tie rod ( 21 ) has two rod heads ( 22 ,  23 ) at the ends of the tie rod ( 21 ), as well as a tension element ( 24 ) that acts between the rod heads ( 22 ,  23 ), and in which the tie rod ( 21 ) is mounted on the crossheads ( 51 ,  52 ) by means of the rod heads ( 22 ,  23 ), wherein the tension element ( 24 ) is disposed between the rod heads ( 22 ,  23 ) of the tie rod ( 21 ) multiple times, wherein the tension element ( 24 ) is disposed so that it is deflected around at least one of the rod heads ( 22 ,  23 ). 
     
     
         26 . Machine frame ( 50 ) according to  claim 25 , wherein the tension element ( 24 ) is passed from a first rod head ( 22 ) to a further rod head ( 23 ) and/or vice versa multiple times, in such a manner that the ultimate strength of the tie rod ( 21 ) is greater than the ultimate strength of the tension element ( 24 ). 
     
     
         27 . Machine frame ( 50 ), having an upper crosshead ( 51 ) and a lower crosshead ( 52 ) for absorbing processing forces introduced into the machine frame ( 50 ), having frame elements ( 53 ) for spacing the crossheads ( 51 ,  52 ) apart from one another, and having at least one tie rod ( 21 ) that acts between the crossheads ( 51 ,  52 ), in which the tie rod ( 21 ) has two rod heads ( 22 ,  23 ) at the ends of the tie rod ( 21 ), as well as a tension element ( 24 ) that acts between the rod heads ( 22 ,  23 ), and in which the tie rod ( 21 ) is mounted on the crossheads ( 51 ,  52 ) by means of the rod heads ( 22 ,  23 ), comprising supports ( 55 ) for mounting at least one of the rod heads ( 22 ,  23 ), whereby at least one of the supports ( 55 ) comprises a pass-through ( 57 ) for the tension element ( 24 ), and whereby the pass-through ( 57 ) has a base surface that is greater than the rod head base surface. 
     
     
         28 . Machine frame ( 50 ) according to  claim 27 , wherein the rod head ( 22 ,  23 ), in each instance, is mounted on the support ( 55 ) so that it is oriented crosswise to the longitudinal expanse of the related pass-through ( 57 ). 
     
     
         29 . Machine frame ( 50 ) according to  claim 27 , wherein the support ( 55 ) comprises a device ( 35 ) for tensioning the tie rod ( 21 ), having tensioning elements ( 37 ,  38 ), in which the tensioning elements ( 37 ,  38 ) are disposed between contact surfaces of the rod head ( 22 ,  23 ) and contact surfaces of the support ( 55 ). 
     
     
         30 . Machine frame ( 50 ), having an upper crosshead ( 51 ) and a lower crosshead ( 52 ) for absorbing processing forces introduced into the machine frame ( 50 ), having frame elements ( 53 ) for spacing the crossheads ( 51 ,  52 ) apart from one another, and having at least one tie rod ( 21 ) that acts between the crossheads ( 51 ,  52 ), in which the tie rod ( 21 ) has two rod heads ( 22 ,  23 ) at the ends of the tie rod ( 21 ), as well as a tension element ( 24 ) that acts between the rod heads ( 22 ,  23 ), and in which the tie rod ( 21 ) is mounted on the crossheads ( 51 ,  52 ) by means of the rod heads ( 22 ,  23 ), comprising supports ( 55 ) for mounting at least one of the rod heads ( 22 ,  23 ), whereby at least one of the supports ( 55 ) comprises a pass-through ( 57 ) for the tension element ( 24 ), and whereby corresponding support pedestals are placed between the rod head ends of the rod head ( 22 ,  23 ) and the support ( 55 ), by means of which a pass-through ( 57 ) is bridged. 
     
     
         31 . Machine frame ( 50 ) according to  claim 25 , further comprising a device ( 20 ) for pre-tensioning the machine frame ( 50 ), said device having a tie rod ( 21 ) comprising a first and a further rod head ( 22 ,  23 ) for placement on the machine frame ( 50 ) and comprising a tension element ( 24 ) for absorbing tensile forces between the rod heads ( 22 ,  23 ), whereby the tension element ( 24 ) extends along a tension distance ( 25 ) of the tie rod ( 21 ), wherein at least one of the two rod heads ( 22 ,  23 ) comprises a device ( 26 ) for reversing the direction for the tension element ( 24 ). 
     
     
         32 . Pressing or drawing device having a machine frame ( 50 ) and having a device ( 20 ) for pre-tensioning the machine frame ( 50 ), wherein the pressing or drawing device comprises a pre-tensioning device ( 20 ) and/or a machine frame ( 50 ) according to  claim 1 .