Clamp jig and method of polishing workpiece

Abstract

Provided is a clamp jig which includes: a workpiece bonding member in which a curved workpiece is bonded to one end side thereof to be held; one clamping member and the other clamping member between which an end of the workpiece bonded to the workpiece bonding member to be held is sandwiched from both sides thereof; an elastic member made of an elastic material that comes in contact with an end of the one clamping member; and a plurality of holding members that push the workpiece by supporting the end of the workpiece at multiple points of the elastic member. In the clamp jig, the end of the workpiece is supported at multi-contacts in a state where curvature of the workpiece is maintained.

What is claimed is: 
     
         1 . A clamp jig grasping a curved workpiece, comprising:
 a workpiece bonding member in which the workpiece is bonded to one end side thereof to be held;   one clamping member and the other clamping member between which an end of the workpiece bonded to the workpiece bonding member to be held is sandwiched from both sides thereof;   an elastic member made of an elastic material that comes in contact with an end of the one clamping member; and   a plurality of holding members that push the workpiece by supporting the end of the workpiece at multiple points of the elastic member, wherein   the end of the workpiece is supported at multi-contacts in a state where curvature of the workpiece is maintained.   
     
     
         2 . A method of polishing a workpiece in which a clamp jig is used and a lower end of the clamp jig is polished by a rotary surface plate, the clamp jig including: a workpiece bonding member in which a curved workpiece is bonded to one end side thereof to be held; one clamping member and the other clamping member between which an end of the workpiece bonded to the workpiece bonding member to be held is sandwiched from both sides thereof; an elastic member made of an elastic material that comes in contact with an end of the one clamping member; and a plurality of holding members that push the workpiece by supporting the end of the workpiece at multiple points of the elastic member, wherein
 when the surface plate rotates, the clamp jig reciprocally moves in a radial direction of the surface plate in a state where the end of the workpiece is maintained between the one and the other clamping members while being curved by the elastic member and the plurality of holding members.