Tool clamping system

Abstract

Disclosed is a tool system including a drive for driving a tool holder including an electromagnetic generator for generating electrical energy from inertial energy of the tool holder. The tool holder may be driven in rotation, wherein the electromagnetic generator comprises a rotor part, which is rotatably mounted on the tool holder, and a stator part on the tool holder cooperating with each other for generating a voltage by electromagnetic induction. Alternatively, an axially movable inertial mass can be used for utilization of an oscillating linear movement.

1 . A tool clamping system for clamping a tool, comprising:
 a tool holder for holding a tool;   a drive for driving said tool holder oscillatingly;   an electromagnetic generator for generating electrical energy from an inertial energy of said tool clamping system;   wherein said electromagnetic generator is configured for generating electrical energy from said inertial energy of said oscillating drive.   
     
     
         2 . The tool clamping system of  claim 1 , wherein said drive is configured for driving said tool holder back and forth in a longitudinal direction. 
     
     
         3 . The tool clamping system of  claim 2 , further comprising an inertial mass being mounted axially movably on a shaft of said tool holder. 
     
     
         4 . The tool clamping system of  claim 3 , wherein said tool holder is configured for receiving a honing tool. 
     
     
         5 . The tool clamping system of  claim 4 , wherein said inertial mass is mounted axially movably between two stops. 
     
     
         6 . The tool clamping system of  claim 3 , wherein, on said shaft and said inertial mass, there is provided at least one winding cooperating with a magnet for generating an induction voltage from said oscillating movement. 
     
     
         7 . The tool clamping system of  claim 6 , wherein said drive is further configured for rotatingly driving said tool, and wherein said at least one winding cooperating with said magnet is further configured for generating an induction voltage from said rotating movement. 
     
     
         8 . The tool camping system of  claim 6 , further comprising at least one permanent magnet arranged on said inertial mass cooperating with said at least one winding, wherein said at least one winding is arranged on said shaft. 
     
     
         9 . The tool camping system of  claim 8 , wherein said at least one winding is part of a magnet array. 
     
     
         10 . The tool clamping system of  claim 8 , wherein said inertial mass is mounted movably in an axial direction between two stops, wherein a maximum amplitude defined in said axial direction between said two stops is greater than an axial length of said at least one permanent magnet. 
     
     
         11 . The tool clamping system of  claim 10 , wherein said at least one winding comprises a magnet core having an axial length deviating from an axial length of said at least one permanent magnet. 
     
     
         12 . A tool clamping system for clamping a tool, comprising:
 a tool holder for holding a tool;   a rotary drive for driving said tool holder rotatingly about a longitudinal axis thereof;   an electromagnetic generator comprising a stator part being mounted on said tool holder and a rotor part being rotatably mounted on said stator part;   wherein said stator part and said rotor part cooperate as an electromagnetic generator configured for generating electrical energy from inertial energy of said rotor part relative to said stator part.   
     
     
         13 . The tool clamping system of  claim 12 , wherein said rotor is mounted magnetically by means of a magnetic bearing comprising permanent magnets. 
     
     
         14 . The tool clamping system of  claim 12 , wherein said rotor comprises a pole system including permanent magnets, said pole system including windings on said stator part. 
     
     
         15 . The tool clamping system of  claim 12 , wherein said electromagnetic generator is configured as a drum rotor with hollow-cylindrical structure or as a disk rotor. 
     
     
         16 . The tool clamping system of  claim 15 , wherein said electromagnetic generator comprises induction windings being connected as mono-phase or multi-phase voltage source. 
     
     
         17 . The tool clamping system of  claim 12 , wherein an output voltage of said electromagnetic generator is fed to a rectifier, an output of which is connected to a voltage stabilizer comprising at least one capacitor. 
     
     
         18 . The tool clamping system of  claim 17 , wherein said capacitor is configured as a gold-cap capacitor. 
     
     
         19 . The tool clamping system of  claim 12 , further comprising a sensor for monitoring at least one operating parameter of said tool clamping system, said sensor generating an output signal indicative for said operating parameter, said output signal being transmitted to an evaluation circuit. 
     
     
         20 . The tool clamping system of  claim 19 , further comprising a transmitter for transmitting said output signal of said sensor wireless to a stationary evaluation circuit provided outside of said tool.