WORK CLAMP METHOD, WORK CLAMP DEVICE, WORK PLANE GRINDING METHOD AND WORK PLANE GRINDER

摘要

PROBLEM TO BE SOLVED: To provide a work clamp method and a work clamp device capable of easily clamping a piece of work in an outer diameter reference with a simple structure.SOLUTION: A work clamp device 5 clamps a piece of work W with a plurality of clamp claws 16 and 16A, and comprises pressing means 19 for retreating while keeping a temporary clamp state, when pressing the piece of work W to a side of part of clamp claw 16A of the respective clamp claws 16 and 16A in an unclamping attitude, and temporarily clamping the piece of work W between the clamp claw 16A and itself in a state where its outside surface follows after the clamp claw 16A, and actually clamping the piece of work W by closing the plurality of clamp claws 16 and 16A. Two pairs of clamp claws 16 and 16A are arranged in the circumferential direction, and the pressing means 19 is arranged between two clamp claws 16 on one side, and presses the pieces of work W to two clamp claw 16A on the other side.