Honing device

Abstract

A honing device includes a honing tool, a rotating main shaft to which the honing tool is fixed, an axial direction driver to cause the rotating main shaft to move in the Z-axis direction, a workpiece holder to hold a workpiece while a central axis of a processed hole of the workpiece and the a central axis of the rotating main shaft coincide with each other, and a holder drive unit to, by exerting a driving force on a portion of the workpiece holder corresponding to a point on an extension line of the central axis of the rotating main shaft in a direction along the central axis, cause the workpiece holder to move in a direction along the central axis.

What is claimed is: 
     
         1 . A honing device comprising:
 a honing tool to a tip portion of which a grindstone is disposed;   a main shaft having a long length and to which the honing tool is fixed while a tip portion of the honing tool extends from one end side in a longitudinal direction of the main shaft;   a rotation driver to cause the main shaft to rotate about a first rotational axis that is along a longitudinal direction of the main shaft;   an axial direction driver to cause the main shaft to move in a first direction that is along the first rotational axis;   a workpiece holder to hold a workpiece while a central axis of a processed hole of the workpiece and the first rotational axis coincide with each other; and   a holder drive unit to, by exerting a driving force on a portion of the workpiece holder corresponding to a point on an extension line of the first rotational axis in a direction along the first rotational axis, cause the workpiece holder to move in a second direction that is an opposite direction to the first direction.   
     
     
         2 . The honing device according to  claim 1 , further comprising:
 a controller to control the axial direction driver in such a way that the main shaft vibrates in a direction along the first rotational axis in a periodic manner and also control the holder drive unit in such a way that the workpiece holder vibrates in a direction along the first rotational axis in a periodic manner with a same period as a period of the main shaft and in a vibration waveform with a phase difference from a vibration waveform of the main shaft.   
     
     
         3 . The honing device according to  claim 2 , wherein the controller controls the holder drive unit to cause the workpiece holder to vibrate in a vibration waveform with a phase difference of x radians from a vibration waveform of the main shaft. 
     
     
         4 . The honing device according to  claim 2 , further comprising:
 an input device through which a user inputs amplitude ratio information indicating an amplitude ratio of amplitude of a vibration waveform of the main shaft to amplitude of a vibration waveform of the workpiece holder, wherein   the controller controls the axial direction driver and the holder drive unit in such a way that the main shaft and the workpiece holder vibrate at an amplitude ratio indicated by the amplitude ratio information.   
     
     
         5 . The honing device according to  claim 1 , wherein the holder drive unit includes:
 a rack gear having a long length and arranged in such a way that a longitudinal direction of the rack gear is along the first rotational axis; and   a pinion gear to rotate about a second rotational axis that is orthogonal to the first rotational axis and mesh with the rack gear on an extension line of the first rotational axis.   
     
     
         6 . The honing device according to  claim 1 , wherein the workpiece holder includes:
 a workpiece rotation restrictor to restrict the workpiece from relatively rotating about a central axis of the processed hole with respect to the workpiece holder;   a workpiece axial direction movement restrictor to restrict the workpiece from relatively moving in a central axis direction of the processed hole with respect to the workpiece holder; and   a workpiece support mechanism to support the workpiece in a movable manner in a direction orthogonal to a direction along the first rotational axis in such a way that a central axis of the processed hole coincides with the first rotational axis.   
     
     
         7 . The honing device according to  claim 1 , further comprising:
 a machine body including a head to collectively hold the honing tool, the main shaft, the rotation driver, and the axial direction driver and a supporting column having a long length, arranged in an attitude in which a longitudinal direction of the supporting column is along the vertical direction, and configured to support the head at one end on a vertically upper side, wherein   the holder drive unit is fixed to the other end on a vertically lower side of the supporting column.   
     
     
         8 . The honing device according to  claim 3 , further comprising:
 an input device through which a user inputs amplitude ratio information indicating an amplitude ratio of amplitude of a vibration waveform of the main shaft to amplitude of a vibration waveform of the workpiece holder, wherein   the controller controls the axial direction driver and the holder drive unit in such a way that the main shaft and the workpiece holder vibrate at an amplitude ratio indicated by the amplitude ratio information.   
     
     
         9 . The honing device according to  claim 2 , wherein the holder drive unit includes:
 a rack gear having a long length and arranged in such a way that a longitudinal direction of the rack gear is along the first rotational axis; and   a pinion gear to rotate about a second rotational axis that is orthogonal to the first rotational axis and mesh with the rack gear on an extension line of the first rotational axis.   
     
     
         10 . The honing device according to  claim 3 , wherein the holder drive unit includes:
 a rack gear having a long length and arranged in such a way that a longitudinal direction of the rack gear is along the first rotational axis; and   a pinion gear to rotate about a second rotational axis that is orthogonal to the first rotational axis and mesh with the rack gear on an extension line of the first rotational axis.   
     
     
         11 . The honing device according to  claim 2 , wherein the workpiece holder includes:
 a workpiece rotation restrictor to restrict the workpiece from relatively rotating about a central axis of the processed hole with respect to the workpiece holder;   a workpiece axial direction movement restrictor to restrict the workpiece from relatively moving in a central axis direction of the processed hole with respect to the workpiece holder; and   a workpiece support mechanism to support the workpiece in a movable manner in a direction orthogonal to a direction along the first rotational axis in such a way that a central axis of the processed hole coincides with the first rotational axis.   
     
     
         12 . The honing device according to  claim 3 , wherein the workpiece holder includes:
 a workpiece rotation restrictor to restrict the workpiece from relatively rotating about a central axis of the processed hole with respect to the workpiece holder;   a workpiece axial direction movement restrictor to restrict the workpiece from relatively moving in a central axis direction of the processed hole with respect to the workpiece holder; and   a workpiece support mechanism to support the workpiece in a movable manner in a direction orthogonal to a direction along the first rotational axis in such a way that a central axis of the processed hole coincides with the first rotational axis.   
     
     
         13 . The honing device according to  claim 2 , further comprising:
 a machine body including a head to collectively hold the honing tool, the main shaft, the rotation driver, and the axial direction driver and a supporting column having a long length, arranged in an attitude in which a longitudinal direction of the supporting column is along the vertical direction, and configured to support the head at one end on a vertically upper side, wherein   the holder drive unit is fixed to the other end on a vertically lower side of the supporting column.   
     
     
         14 . The honing device according to  claim 3 , further comprising:
 a machine body including a head to collectively hold the honing tool, the main shaft, the rotation driver, and the axial direction driver and a supporting column having a long length, arranged in an attitude in which a longitudinal direction of the supporting column is along the vertical direction, and configured to support the head at one end on a vertically upper side, wherein   the holder drive unit is fixed to the other end on a vertically lower side of the supporting column.