Device and Method for the Double-Sided Processing of Flat Work Pieces

Abstract

The invention relates to a device for the double-sided processing of flat work pieces, comprising an upper working disc and a lower working disc, wherein the working discs between the working surfaces thereof facing each other, form a working gap for processing the work pieces, and wherein at least one of the working discs comprises a plurality of bores extending through the working surface for feeding a liquid working medium into the working gap, wherein the bores are combined in several groups, wherein each group of bores is connected to a separate pressurized supply line for the working medium, and at least one pressure control apparatus is provided, which makes it possible to control the pressure of the working medium in the supply lines separately from one another.

1 . A device for the double-sided processing of flat work pieces, comprising an upper working disc ( 40 ) and a lower working disc, wherein the working discs ( 40 ) between the working surfaces ( 46 ) thereof facing each other, form a working gap for processing the work pieces, and wherein at least one of the working discs ( 40 ) has a plurality of bores ( 48 ) extending through the working surface ( 46 ) for supplying a liquid working medium into the working gap,
 wherein the bores ( 48 ) are combined into several groups, wherein each group of bores ( 48 ) is connected to a separate pressurized supply line ( 36 ) for the working means, and   wherein at least one pressure control apparatus ( 35 ) is provided with which the pressure of the working means in the supply lines ( 36 ) can be regulated separately from each other.   
     
     
         2 . The device according to  claim 1 , wherein the supply lines ( 36 ) can each be connected to a common main pressure supply line and to the bores ( 48 ) of one group. 
     
     
         3 . The device according to  claim 2 , wherein the common main pressure supply line is guided through a vertical drive shaft ( 20 ) assigned to the at least one working disk ( 40 ) provided with the bores ( 48 ). 
     
     
         4 . The device according to  claim 2 , wherein the supply lines ( 36 ) are guided through a vertical drive shaft ( 20 ) assigned to the at least one working disk ( 40 ) provided with the bores ( 48 ). 
     
     
         5 . The device according to  claim 1 , wherein the cross section of the bores ( 48 ), or the cross section of lines ( 52 ) of liquid guided in the bores ( 48 ), are reduced in the region of the end thereof opening into the working surface ( 46 ). 
     
     
         6 . The device according to  claim 1 , wherein a measurement apparatus for measuring the torque applied by a rotary drive onto at least one vertical shaft ( 20 ) connected to the at least one of the working discs, wherein the control apparatus ( 35 ) compares the torque measured by the measurement apparatus with a reference torque or a reference torque range, and in the case of a deviation of the measured torque from the reference torque or the reference torque range changes the pressure of the working means in at least a few of the supply lines ( 36 ) such that the measured torque is again equal to the reference torque or lies within the reference torque range. 
     
     
         7 . The device according to  claim 6 , wherein the control device ( 35 ) compares the measured torque with a predetermined limit torque, and that if the measured torque fall below the limit torque, the control apparatus ( 35 ) reduces the pressure of the working means in at least a few of the supply lines ( 36 ) such that the value of the measured torque is again above the limit torque. 
     
     
         8 . The device according to  claim 1  wherein the bores ( 48 ) are combined into groups depending on how often the bores ( 48 ) are covered by work pieces to be processed during operation of the device ( 10 ). 
     
     
         9 . The device according to  claim 8 , wherein the control apparatus ( 35 ) sets the pressure of working means in the supply lines ( 36 ) of the group depending on how frequently the bores ( 48 ) of a respective group are to be covered by work pieces to be processed during operation of the device ( 10 ). 
     
     
         10 . A method for operating a device for the double-sided processing of flat work pieces, wherein the device has an upper working disc ( 40 ) and a lower working disc, wherein the working discs ( 40 ) between the working surfaces ( 46 ) thereof facing each other form a working gap for processing the work piece, and wherein at least one of the working discs ( 40 ) has a plurality of bores ( 48 ) extending through the working surface ( 46 ) for supplying a liquid working medium into the working gap,
 wherein the bores ( 48 ) are combined into several groups,   wherein each group of bores ( 48 ) is pressurized with working means, and   the working means pressure of the working means supplied to each of the groups ( 48 ) can be regulated separately from each other.   
     
     
         11 . The method according to  claim 10 , wherein the torque applied by a rotary drive onto at least one vertical drive shaft ( 20 ) connected to at least one of the working disks, is measured, and the torque measured by the measurement apparatus with a reference torque or a reference torque range, and in the case of a deviation of the measured torque from the reference torque or the reference torque range changes the pressure of the working means in at least a few of the supply lines such that the measured torque is again equal to the reference torque or lies within the reference torque range. 
     
     
         12 . The method according to  claim 11 , wherein the measured torque is compared to a predetermined limit torque, and that if the measured torque falls below the limit torque, the pressure of the working means of the working means supplied to at least a few groups is reduced so that the measured torque is again above the limit torque. 
     
     
         13 . The method according to  claim 10 , wherein the bores ( 48 ) are combined into groups depending on how often the bores ( 48 ) are to be covered by the work pieces to be processed during operation of the device. 
     
     
         14 . The method according to  claim 13 , wherein the pressure of working means of the working means supplied to the groups is set depending on how frequently the bores ( 48 ) of a respective group are to be covered by the work pieces to be processed during operation of the device.