JIG FOR FIXING INSIDE DIAMETER OF WORK PIECE

摘要

The present invention provides a jig for fixating an inner diameter of a workpiece comprising: a table having a locking groove and having a first shaft receiving groove; a rotation shaft wherein a supporter is installed and screw threads is formed in an outer circumference and a handle is formed in one end; a support unit where an insertion hole and a recessed groove and a contact unit and a locking piece and a second shaft receiving groove and an installation groove and a penetration hole are formed; a first rotor composed of a rotational shaft and a ring-shaped gear wheel and a first bevel gear; a second rotor having a second bevel gear and composed of a rotation induction unit having a first coupling hole; a moving shaft where a body unit and a control tap and a second coupling hole are formed; and a pipe expansion body wherein a fastening groove is formed and a pipe expansion wing composed of a tilted inner surface unit and a tilted outer surface unit is installed in a circumferential form.