Belt processing device

Abstract

A belt processing device moves a processing belt relative to a workpiece to process the workpiece. The belt processing device comprises a first roller that is a processing roller, a second roller that is a driven roller, a processing belt that is supported by the first roller and the second roller, a pneumatic motor that rotates the first roller or the second roller, an elastic ring that is installed on the outer circumference of the first roller, and an expansion prevention member that is installed on the elastic ring and has a greater modulus of elasticity than the elastic ring.

1 . A belt machining device, which moves a machining belt relative to a workpiece to machine the workpiece, the belt machining device comprising:
 a first roller, which is a machining roller,   a second roller,   a machining belt which is supported by the first roller and the second roller,   a rotational power generation unit which rotates the first roller or the second roller,   an annular elastic body which is attached to an outer circumference of the first roller, and   an annular expansion prevention member which is attached to the elastic body and which has an elastic modulus greater than the elastic body.   
     
     
         2 . The belt machining device according to  claim 1 , wherein a portion of the machining belt which engages with the first roller contacts a surface of the workpiece to machine the surface of the workpiece. 
     
     
         3 . The belt machining device according to  claim 1 , wherein the rotational power generation unit comprises a fluid motor. 
     
     
         4 . The belt machining device according to  claim 3 , wherein the fluid motor is a pneumatic motor. 
     
     
         5 . The belt machining device according to  claim 1 , further comprising a holder part which can be attached to a tip of a spindle of a machine tool comprising a spindle, a table which is arranged to face the spindle and to which a workpiece is attached, and a feed device which moves the spindle and the table relative to each other.