Tool, device and method for deburring bore holes

Abstract

A rotationally driven tool for deburring bore holes, which join laterally into a substantially cylindrical recess. The tool contains a cutting head seated on a shaft, wherein the cutting head contains at least one cutting edge, which extends in the axial direction at least one some sections. In order to perform the deburring process reliably and with as little effort as possible, the tool contains at least one inner flow-enhancing agent channel, from which at least one cutoff channel extends, which joins in the area of the cutting head in an outer circumferential surface thereof preferably at a circumferential distance to the at least one cutting edge. Because the diameter of the cutting head is selected such that it can be introduced into the recess with radial play, the feeding of pressurized flow-enhancing agent leads to a radial excursion of the tool shaft.

1 . (Amended) A rotationally drivable tool for deburring bore holes, including bore holes that join laterally into a substantially cylindrical recess, which comprises: 
 a cutting head for deburring the bore holes and which comprises a shaft in which the cutting head is seated, wherein the cutting head contains at least one cutting edge, which extends in the axial direction at least on some sections and which due to a relative movement between the tool and workpiece performs a cutting operation;    at least one inner flow-enhancing agent channel, from which at least one cutoff channel extends, which joins in an area of the cutting head in an outer circumferential surface at a circumferential distance to said at least one cutting edge, wherein a diameter of the cutting head is such that said cutting head is introduceable into the recess with radial play.    
     
     
         2 . (Amended) Tool according to  claim 1 , wherein said cutting head has a plurality of cutoff channels formed therein which respectively communicate with a plurality of port openings, which are distributed unevenly across a circumference of the cutting head such that a total of dynamic pressure forces generated in an area of the port openings between the cutting head and the inner wall of the recess applies an excursion force to the cutting head in a radial direction.  
     
     
         3 . (Amended) Tool according to  claim 1 , wherein said at least one cutoff channel comprises a plurality of cutoff channels and wherein such port openings are staggered in an axial direction.  
     
     
         4 . (Amended) Tool according to one of  claim 1 , wherein said at least one cutoff channel has a diameter in a range from 0.1 to 5 mm.  
     
     
         5 . (Amended) Tool according to one of  claim 1 , wherein said at least one cutting edge comprises a plurality of multitude of cutting edges distributed across a circumference.  
     
     
         6 . (Amended) Tool according to one of  claim 1 , wherein said shaft has a length in a range of from 5 to 1000 mm.  
     
     
         7 . (Amended) Tool according to one of  claim 1 , wherein said shaft is tapered in relation to a diameter of the cutting head.  
     
     
         8 . (Amended) Tool according to one of  claim 1 , wherein said at least one flow-enhancing channel comprises a plurality of flow-enhancing agent channels.  
     
     
         9 . (Amended) Tool according to  claim 2 , wherein at least one of said port openings is located in an area of said at least one cutting edge.  
     
     
         10 . (Amended) Tool according to  claim 2 , wherein said at least one cutting edge comprises a plurality of cutting edges and at least one of the port openings is located in an area of a groove base located between two adjacent cutting edges of said plurality of cutting edges.  
     
     
         11 . (Amended) Tool according to  claim 1 , wherein said the at least one cutoff channel comprises a substantially straight lined cutoff channel.  
     
     
         12 . (Amended) Tool according to  claim 11 , wherein said at least one cutoff channel comprises a bore hole formed in said cutting head.  
     
     
         13 . (Amended) Tool according to  claim 11 , wherein said at least one cutoff channel comprises an eroded recess formed in said cutting head.  
     
     
         14 . (Amended) Tool according to  claim 11 , wherein an angle of the cutoff channel formed with respect to the axis of the tool is in the range from 5 to 175°.  
     
     
         15 . (Amended) Tool according to  claim 1 , wherein said at least one cutting edge forms an angle with respect to an axial plane of the tool.  
     
     
         16 . (Amended) Tool according to  claim 1 , wherein the cutting head has a gate, which is formed by one of a chamfer or a rounded section.  
     
     
         17 . (Amended) Tool according to  claim 1 , wherein the radial play is in the range from 0.1 to 5 mm.  
     
     
         18 . (Amended) Tool according to  claim 1 , wherein said cutting head comprises one of wear-resistant steel, a high-speed steel, a hard metal and cerement.  
     
     
         19 . (Amended) Tool according to  claim 1 , wherein said shaft on a side thereof facing away from the cutting head, has connected thereto a fastening and fixation body, with which the tool can be fixed to a tool holding fixture for providing rotational and sliding movements thereof.  
     
     
         20 . (Amended) Tool according to  claim 1 , wherein said shaft, on a side thereof facing away from the cutting head, has a body connected thereto via which the flow-enhancing agent is feedable into the at least one flow-enhancing agent channel.  
     
     
         21 . (Amended) Tool according to  claim 19  wherein the fastening and fixation body comprises an element for feeding the flow-enhancing agent.  
     
     
         22 . (Amended) Tool according to  claim 1 , wherein said tool comprises one of a milling tool, a boring tool, a deep hole boring tool, a straight-fluted boring tool, a twist drill tool and a reamer.  
     
     
         23 . (Amended) Device for deburring bore holes, which join laterally into a substantially cylindrical recess, with a tool according to  claim 1 , which comprises a rotational drive device for driving said tool and a flow-enhancing agent source for feeding pressurized flow-enhancing agent into the at least one flow-enhancing agent channel.  
     
     
         24 . (Amended) Device according to  claim 23 , wherein the flow-enhancing agent comprises one of a liquid or gaseous coolant and a lubricant.  
     
     
         25 . (Amended) Device according to  claim 23  which comprises a pressure generating device having a flow-enhancing agent pressure in a range of from 3 to 3000 bar.  
     
     
         26 . (Amended) Device according to  claim 23 , which comprises a tool holding fixture connected to said shaft by fastening and fixation body via a bayonet lock.  
     
     
         27 . (Amended) Device for deburring bore holes, which join laterally into a substantially cylindrical recess, according to  claim 23 , with a tool having a fastening and fixation body with an element for feeding a flow enhancing agent thereto, which comprises a cylindrical body located a side facing away from a cutting head for feeding pressurized flow-enhancing agent, wherein the flow-enhancing agent pressure generates an axially stationary fixation force on the tool for preventing rotational movements in the tool holding fixture.  
     
     
         28 . (Amended) Device according to  claim 27 , wherein the tool holding fixture comprises a cylindrical holding bore for a body for feeding the flow-enhancing agent and a radially adjustable locking body having a keyhole recess, against which a shoulder of the fastening and fixation body is subjected to a pressure force when the flow-enhancing agent pressure is fed into the fastening and fixation body.  
     
     
         29 . (Amended) Method for deburring bore holes, which comprises the steps of: 
 (a) inserting a tool into a recess of a work piece for performing relative rotational movement in relation to the work piece; and    (b) building up a flow of a pressurized flow-enhancing agent through the tool while simultaneously radially moving the cutting head.    
     
     
         30 . (Amended) Method according to  claim 29 , which comprises releasing the flow-enhancing agent so that the flow-enhancing agent exiting at least one port opening of the cutting head generates a cutting jet by which a machining operation is performed.  
     
     
         31 . (Amended) Method according to claims  29  or  30 , characterized by the following steps: 
 a) inserting a tool into a recess of a work piece for performing relative rotational movement in relation to a workpiece having the recess  
 b) building up a flow of the pressurized flow-enhancing agent through the tool simultaneous radial excursing the cutting head.  
 
     
     
         32 . (Amended) Method according to  claim 31 , which comprises performing a feeding motion during step b) at least by one of the tool and the work piece.  
     
     
         33 . (Amended) Method according to one of the claims  29  through  32 , which comprises operating the tool and/or the work piece at a speed in a range from 100 to 50,000 RPM.  
     
     
         34 . (Amended) Method according to one of the claims  29  through  33 , wherein the cutting speed is in the range from 20 to 300 m/min.