CAUKING TOOL FOR IMPROVING STRIPPER STRUCTURE OF PUNCH TOOL TO EXTEND REPLACEMENT CYCLE AND CIRCUMFERENTIALLY GUIDING AND SUPPORTING COLLET OF DIE TOOL TO PREVENT DISMANTLING OF PARTS OF COLLET

摘要

PURPOSE: To provide a cauking tool for joining steel sheets, to extend service life to 200,000 cycles or more by constructing a stripper in a coil spring type, to minimize working radius by inserting the stripper into a punch die, thereby limiting an operation range of the stripper, and to prevent dismantling and separation of parts of collet by mounting a die cover on the outer circumference of the collet. CONSTITUTION: The cauking tool for joining steel sheets comprises a punch tool(P) comprising a punch cover(15) on an upper portion where set bolt fixing holes(16,16') are perforated, a stripper(11) in which an empty space(12) is formed, and a punch on which a shank(10) and a set bolt fixing groove(14) are formed, wherein the stripper and the punch are inserted into the punch cover in such a manner that a coil spring(17) is inserted onto the outer circumference of the punch in an upper part of the stripper, and set bolts(18,18') are screw connected to the set bolt fixing groove through the set bolt fixing holes from the outer side of the punch cover to fix the punch; and a die tool(D) with a die cover(21) on an upper portion where a collet guide(23) is formed, and on an intermediate portion of which vent holes(24,24') are perforated, a collet(20), and a die(25) on a lower portion where a shank(22) is formed, wherein the collet is inserted into the die cover, and the die is close fitted into the collet so that the die is fixed.