Grinding processing apparatus

Abstract

A grinding processing apparatus according to an embodiment includes: a rotary table configured to be rotatable and to hold a workpiece; a grinder including a rotation unit and configured to grind a surface of the workpiece held by the rotary table by rotation of the rotation unit; a holding unit configured to hold the grinder such that a rotation axis of the rotation unit forms an angle exceeding 0 degrees and being 60 degrees or less to a vertical axis; a horizontal movement slider configured to slide the holding unit in a horizontal direction in a state where a tip tool of the rotation unit is in contact with the workpiece; and a controller configured to control rotation of the rotary table and the rotation unit, and to control the grinder to linearly slide between a center side and an outer peripheral side of the workpiece.

What is claimed is: 
     
         1 . A grinding processing apparatus, comprising:
 a rotary table configured to be rotatable and to hold a workpiece;   a grinder including a rotation unit and configured to grind a surface of the workpiece held by the rotary table by rotation of the rotation unit;   a holding unit configured to hold the grinder such that a rotation axis of the rotation unit forms an angle exceeding 0 degrees and being 60 degrees or less to a vertical axis;   a horizontal movement slider configured to slide the holding unit in a horizontal direction in a state where a tip tool of the rotation unit is in contact with the workpiece; and   a controller configured to control rotation of the rotary table and the rotation unit, and to control the grinder to linearly slide between a center side and an outer peripheral side of the workpiece.   
     
     
         2 . The grinding processing apparatus according to  claim 1 , wherein the tip tool of the grinder is a cup brush-type wire brush. 
     
     
         3 . The grinding processing apparatus according to  claim 2 , wherein a diameter of a steel wire of the wire brush of the grinder is 0.01 mm or more and 2 mm or less. 
     
     
         4 . The grinding processing apparatus according to  claim 3 , wherein the steel wire is any of a hard steel wire and a plated steel wire. 
     
     
         5 . The grinding processing apparatus according to  claim 1 , wherein, in a case where the angle is formed by tilting an upper side of the rotation axis from the vertical axis toward one direction of two directions along an axis orthogonal to the vertical axis, the controller is configured to slide the grinder in another direction along the orthogonal axis. 
     
     
         6 . The grinding processing apparatus according to  claim 1 , wherein the controller is configured to control the horizontal movement slider to horizontally move the grinder from the outer peripheral side to the center side of the workpiece. 
     
     
         7 . The grinding processing apparatus according to  claim 1 , wherein the controller is configured to control the horizontal movement slider to horizontally move the grinder from the center side to the outer peripheral side of the workpiece. 
     
     
         8 . The grinding processing apparatus according to  claim 1 , wherein the controller is configured to control the rotary table to cause a rotational speed of the workpiece to be 3000 rpm or more and 6000 rpm or less. 
     
     
         9 . The grinding processing apparatus according to  claim 1 , wherein the controller is configured to control the grinder to cause a rotational speed of the rotation unit to be 1000 rpm or more and 15000 rpm or less. 
     
     
         10 . The grinding processing apparatus according to  claim 1 , wherein the controller is configured to control the horizontal movement slider to cause a speed of horizontal movement of the grinder to be 0.5 m/s or more and 5.0 m/s or less. 
     
     
         11 . The grinding processing apparatus according to  claim 1 , wherein the controller is configured to control a rotational speed of the rotary table and a speed of horizontal movement of the grinder to cause each of positions on a surface of the workpiece to come into contact with the tip tool and be ground a same number of times as number of times of grinding at other positions.