Chip-removing tool for deburring bores

Abstract

A chip-removing tool for deburring bores, which laterally open into a cylindrical recess for example, comprising a shaft; a cutting head with at least one cutting wedge on the circumference, said cutting wedge being paired with a flute and having a cutter, which extends in an axial direction at least in some sections, carries out a cutting process on the basis of a relative movement between the tool and a workpiece, and lies on a virtual cylindrical rotational surface with a diameter that corresponds to the nominal diameter of the chip-removing tool, and at least one cutting wedge- and flute-free surface region; at least one fluid channel closed on the cutting head side and extending through the shaft and into the cutting head; and at least one puncture channel which starts from the fluid channel and comprises an opening that lies in the cutting wedge- and flute-free surface region.

1 . A chip-removing tool, for deburring bores, comprising:
 a shaft,   a cutting head with at least one cutting wedge on the circumference, said cutting wedge being paired with a flute and having a cutter, which extends in an axial direction at least in some sections, carries out a cutting process on the basis of a relative movement between tool and workpiece, and lies on a virtual cylindrical rotational surface with a diameter that corresponds to a nominal diameter of the chip-removing tool, and at least one cutting wedge- and flute-free surface region,   at least one fluid channel, which is closed on the cutting head side and which extends through the shaft and into the cutting head, and   at least one puncture channel, which starts from the fluid channel and comprises an opening that lies in the cutting wedge- and flute-free surface region,   the opening that lies in the cutting wedge- and flute-free surface region in a dynamic pressure active surface, which is radially recessed relative to the virtual rotational surface of the cutting head, and which is larger than a flow cross sectional surface of the at least one puncture channel at the opening.   
     
     
         2 . The chip-removing tool according to  claim 1 , wherein the dynamic pressure active surface is provided in such a way that the sum of the dynamic pressure forces created in the region of the dynamic pressure active surface between the chip-removing tool or the cutting head, respectively, and the inner wall of the recess, can deflect the shaft in the radial direction. 
     
     
         3 . The chip-removing tool according to  claim 1 , wherein the dynamic pressure active surface has a shape of an even surface. 
     
     
         4 . The chip-removing tool according to  claim 1 , wherein the dynamic pressure active surface has a shape of a trough-like depression. 
     
     
         5 . The chip-removing tool according to  claim 1 , wherein the dynamic pressure active surface is shaped concavely or convexly in a direction of the at least one puncture channel. 
     
     
         6 . The chip-removing tool according to  claim 1 , wherein the dynamic pressure active surface runs axially parallel to a longitudinal central axis of the tool. 
     
     
         7 . The chip-removing tool according to  claim 1 , wherein the dynamic pressure active surface has a smaller axial length than the cutting head. 
     
     
         8 . The chip-removing tool according to  claim 7 , wherein, viewed in a tool feed direction, the dynamic pressure active surface ends at a defied distance to a front and rear end of the cutting head. 
     
     
         9 . The chip-removing tool according to  claim 1 , wherein the chip-removing tool has two straight-lined puncture channels, which starts at the at least one fluid channel. 
     
     
         10 . The chip-removing tool according to  claim 1 , wherein the at least one fluid channel runs along a longitudinal central axis of the chip-removing tool. 
     
     
         11 . The chip-removing tool according to  claim 1 , wherein the diameter of the cutting head is larger than a diameter of the shaft. 
     
     
         12 . The chip-removing tool according to  claim 1 , wherein the cutting head has a plurality of cutting wedges comprising straight grooves. 
     
     
         13 . The chip-removing tool according to  claim 1 , wherein a plurality of interior fluid channels are provided. 
     
     
         14 . The chip-removing tool according to  claim 1 , wherein the cutting head has a gate at least on its side, which faces away from the shaft. 
     
     
         15 . The chip-removing tool according to  claim 1 , wherein the tool is configured to function as a milling or drilling tool, or as a reamer. 
     
     
         16 . The chip-removing tool according to  claim 1 , wherein the cutting head is divided in a circumferential direction into a cutting wedge partial region and a cutting wedge- and flute-free partial region, which forms the cutting wedge- and flute-free surface region. 
     
     
         17 . The chip-removing tool according to  claim 1 , wherein the tool is a rotationally driven chip-removing tool. 
     
     
         18 . The chip-removing tool according to  claim 1 , wherein the too is for deburring bores that laterally open into a cylindrical recess. 
     
     
         19 . The chip-removing tool according to  claim 12 , wherein the cutting head has three cutting wedges comprising straight grooves.