Device and method for the surface machining of workpieces

Abstract

A device for surface machining of a workpiece includes: a plurality of tools configured to rotate and/or oscillate around axes; and two tool holders, arranged one behind the other in a direction of passing of the workpiece. Each tool holder has at least one tool, the two tool holders being movable in a common plane in opposite directions transverse to the direction of passing of the workpiece. A maximum machining width of the device corresponds to a sum of the widths of machining areas defined by the tools transverse to the direction of passing of the workpiece.

What is claimed is: 
     
         1 . A device for surface machining of a workpiece, the device comprising:
 a plurality of tools configured to rotate and/or oscillate around axes; and   two tool holders ( 15 ,  16 ), arranged one behind the other in a direction of passing ( 14 ) of the workpiece, each tool holder ( 15 ,  16 ) having at least one tool ( 12 ,  13 ), the two tool holders ( 15 ,  16 ) being movable in a common plane in opposite directions transverse to the direction of passing ( 14 ) of the workpiece, and wherein a maximum machining width of the device ( 1 ) corresponds to a sum of the widths of machining areas defined by the tools ( 12 ,  13 ) transverse to the direction of passing ( 14 ) of the workpiece.   
     
     
         2 . The device according to  claim 1 , further comprising guides ( 22 ,  23 ) in which the two tool holders ( 15 ,  16 ) are movable at a common carrier ( 21 ), the distance of the common carrier ( 21 ) relative to a machining plane of the workpiece being adjustable. 
     
     
         3 . The device according to  claim 2 , further comprising:
 a circulating belt ( 26 ) at which the two tool holders ( 15 ,  16 ) are arranged; and   a drive ( 25 ) configured to drive the circulating belt ( 26 ).   
     
     
         4 . The device according to  claim 1 , wherein each tool holder ( 15 ,  16 ) has a plurality of tools ( 12 ,  13 ) arranged in a row transverse to the direction of passing ( 14 ) of the workpiece. 
     
     
         5 . The device according to  claim 4 , wherein the tools ( 12 ,  13 ) of a particular tool holder ( 15 ,  16 ) have a common drive ( 17 ,  18 ). 
     
     
         6 . A method for surface machining of a workpiece using a device according to  claim 1 , the method comprising:
 carrying out the surface machining with tools in the two tool holders ( 15 ,  16 );   rotating and/or oscillating the tools around axes of the tools;   arranging the two tool holders ( 15 ,  16 ), which are displaceable transverse to a direction of passing ( 14 ) of the workpiece, one behind the other in the direction of passing ( 14 ) of a workpiece, wherein the width of every machining area defined by the tools ( 12 ,  13 ) transverse to the direction of passing ( 14 ) of the workpiece amounts to one half of a maximum machining width of the device ( 1 ); and   oscillating the two tool holders ( 15 ,  16 ) transverse to the direction of passing ( 14 ) of the workpiece during the surface machining.   
     
     
         7 . The method according to  claim 6 , wherein the two tool holders ( 15 ,  16 ) oscillate synchronously in opposite directions. 
     
     
         8 . The method according to  claim 6 , wherein the tools of the two tool holders rotate and/or oscillate about their respective axes in opposite directions. 
     
     
         9 . The method according to  claim 6 , wherein when tools work at an offset transverse to a center plane in the direction of passing ( 14 ) of the workpiece, an offset of the two tool holders ( 15 ,  16 ) transverse to a center plane ( 34 ) of the two tool holders ( 15 ,  16 ) is changed when there is wear of inner ones of the tools. 
     
     
         10 . The method according to  claim 6 , wherein the two tool holders ( 15 ,  16 ) are positioned one directly behind the other during the surface treatment.