MARKING DEVICE FOR BENDING THE TUBE

摘要

A marking apparatus for bending a tube is provided to mark a bending start point along other side section of a bush for making by using the front end of a scriber. A marking apparatus for bending a tube(20) comprises an index clamp block(10) fixing a part of tube to be bent and having a levelly processed reference plane(15) at one side surface; a bush for marking(30) fit into the outer peripheral surface of the tube in order that one side section tightly contacts to the reference plane of the index clamp block; and a scriber indicating the marking start point on the outer peripheral surface of the tube along other side section of the bush for marking. An end protrusion unit having the inside diameter bigger than the inside diameter of the bush for marking is formed on the inside diameter surface at other side end of the bush for marking.