Importance

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Abstract

There provides a tool, which is capable of smoothly executing a cutting and protruding process in all the steps from the starting to ending of cutting and protruding of a small protrusion when the protrusion is cut and protruded on an upper surface of a workpiece. In a protrusion forming tool for forming a protrusion 33 on a surface of a workpiece by cooperation of a punch 3 and a die 7, the punch 3 has a cylindrical punch guide 9, and a punch driver 15 having a punch head 17 at its upper end is provided to an upper portion of the punch guide 9 so as to be movable up and down and so that a force is applied to the punch driver 15, and an elastic member 23 is provided between an up/down slider 21, which is provided in a position below the punch driver 15 in the punch guide 9 movably up and down, and the punch driver 15, and a cutting and protruding blade 25C for cutting and protruding a protrusion on a surface of a workpiece is provided at a lower end of a punch body 25 which is provided in a position below the up/down slider 21 in the punch guide 9, and an upper surface of the punch body 25 is brought into surface-contact with an inclined surface 21A on a lower surface of the up/down slider 21.

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First Claim