Method And Device, For Grinding A Cutting Tool, Especiallay A Knife

Abstract

The invention relates to a method for grinding a cutting tool, especially a knife. The aim of the invention is to provide a method which allows configuration of individual leaf or blade geometries at comparatively low costs. For this purpose, the cutting tool is contacted with the effective surface of a grinding device, and the cutting tool and the grinding device can be displaced in relation to each other by at least three degrees of freedom.

1 . A method for grinding treatment of a cutting tool, in particular a knife, where the cutting tool is brought into contact with the active surface of a grinding device, whereby the cutting tool and the grinding device are moved relative to each other in at least three degrees of freedom. 
   
   
       2 . The method according to  claim 1 , wherein the grinding device is moved rotationally and/or translationally. 
   
   
       3 . The method according to  claim 1 , wherein the cutting tool is moved rotationally and/or translationally. 
   
   
       4 . The method according to  claim 1 , wherein the final grinding geometry of the cutting toot is achieved by the superposition of the rotational and/or translational motion of the grinding device and the rotational and/or translational motion of the cutting tool. 
   
   
       5 . The method according to  claim 1 , wherein the grinding device is moved rotationally and translationally in at least one direction which is transverse to the rotational axis. 
   
   
       6 . The method according to  claim 1 , wherein the cutting tool is moved rotationally and translationally at least one direction which is transverse to the rotational axis. 
   
   
       7 . The method according to  claim 1 , wherein the cutting tool is moved translationally in a direction which is transverse to the face normal of the active surface of the grinding device. 
   
   
       8 . The method according to  claim 1 , wherein the cutting tool is moved rotationally around an axis of revolution which is parallel to the rotational axis of the grinding device. 
   
   
       9 . The method according to  claim 1 , wherein the cutting tool and the grinding device are driven in the same direction in relation to their respective rotational motions. 
   
   
       10 . The method according to  claim 1 , wherein the cutting tool is driven in an oscillating manner with a predeterminable frequency in relation to its translational and/or rotational motion. 
   
   
       11 . The method according to  claim 1 , wherein the grinding device is driven in an oscillating manner with a predeterminable frequency in relation to its translational and/or rotational motion. 
   
   
       12 . The method according to  claim 1 , wherein the grinding device is driven at a higher rotational speed with regard to its rotary motion in comparison with the rotary motion of the cutting tool. 
   
   
       13 . The method according to  claim 1 , wherein the grinding device is driven at a predeterminable rotating speed with regard to its rotary motion. 
   
   
       14 . The method according to  claim 1 , wherein the cutting tool is driven at a predeterminable rotating speed with regard to its rotary motion. 
   
   
       15 . The method according to  claim 1 , wherein the rotating speed of the grinding device and/or the rotating speed of the cutting tool is set as desired in the course of the execution of the method. 
   
   
       16 . The method according to  claim 1 , wherein the blade of the cutting tool is treated. 
   
   
       17 . The method according to  claim 1 , wherein during a first grinding treatment, one blade side, and during a second grinding treatment, the other blade side of the cutting tool is finished in one step. 
   
   
       18 . The method according to  claim 1 , wherein the transition area between the blade side and the bolster is treated, and preferably rounded. 
   
   
       19 . The method according to  claim 1 , wherein the transition area between the blade side and the blade back is treated, and preferably rounded. 
   
   
       20 . The method according to  claim 1 , wherein the cutting tool clamped in a holding device is guided past a rotatably arranged grinding device with its blade sides to be treated, where the active surface of the grinding device is essentially brought into line contact with the blade side to be treated, and the grinding device is moved translationally and transversely to its axis of revolution in dependence on the blade geometry to be produced. 
   
   
       21 . The method according to  claim 20 , wherein the holding device is designed rotatably, and the cutting tool is guided past the active surface of the grinding device on at least a partly circular path. 
   
   
       22 . The method according to  claim 20 , wherein the active surface of the grinding device is essentially brought into line contact with the blade side of the cutting tool to be treated in longitudinal direction of that blade side across its entire length. 
   
   
       23 . The method according to  claim 20 , wherein the holding device is arranged movably in at least two directions which are transverse to each other, and that the cutting tool is guided past the active surface of the grinding device, while these two directions of motion are superposed. 
   
   
       24 . The method according to  claim 20 , wherein the cutting tool is guided past the active surface of the grinding device by a superposition of the two translational directions of motion on at least a partly circular path. 
   
   
       25 . The method according to  claim 1 , wherein the wear of the active surface of the grinding device is compensated by a translational adjustment motion of the grinding device transverse to its axis of revolution. 
   
   
       26 . The method according to  claim 20 , wherein the holding device, including the clamped cutting tool, is moved toward the grinding device in the beginning of the grinding process. 
   
   
       27 . A device for grinding treatment of a cutting tool, in particular a knife, with a holding device for accommodating the cutting tool to be treated and a grinding device, whereby the holding device and the grinding device are arranged movable relative to each other with regard to at least three degrees of freedom. 
   
   
       28 . The device according to  claim 27 , wherein the holding device is designed rotatably. 
   
   
       29 . The device according to  claim 27 , wherein the holding device is designed translationally movable. 
   
   
       30 . The device according to  claim 27 , wherein the holding device is designed translationally movable in two directions which are transverse to each other. 
   
   
       31 . The device according to  claim 27 , wherein the holding device is translationally movable longitudinally and transversely to its axis of revolution. 
   
   
       32 . The device according to  claim 27 , wherein the holding device is formed in the shape of a cylinder. 
   
   
       33 . The device according to  claim 32 , wherein the holding device comprises several holding elements on its outer cylinder surface for simultaneous accommodation of several cutting tools. 
   
   
       34 . The device according to  claim 27 , wherein the holding device has a longitudinal extent which exceeds the longitudinal extent of a cutting tool accommodated by the holding device. 
   
   
       35 . The device according to  claim 27 , wherein the grinding device is designed rotatably. 
   
   
       36 . The device according to  claim 27 , wherein the grinding device is designed translationally movable transverse to its axis of revolution. 
   
   
       37 . The device according to  claim 27 , wherein the grinding device is formed annularly, whereby the outer surface of the ring forms the active surface of the grinding device provided with an abrasive. 
   
   
       38 . The device according to  claim 27 , wherein the width of the active surface in longitudinal direction of the axis of revolution of the holding device is formed corresponding to the length of the cutting tool. 
   
   
       39 . The device according to  claim 27 , wherein the grinding device is formed rounded on the bolster side of the cutting tool to be treated. 
   
   
       40 . The device according to  claim 27 , comprising a computer unit for controlling the rotational and/or translational traversing movement of the holding device and/or the grinding device.