| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method of working metal and a tool for forming a boss by which fine appearance is obtained easily and a boss having high mechanical strength between itself and the body of equipment is formed. <P>SOLUTION: The boss (projection) 31 is formed by making a metal enter the groove of a working tool 1 by making the metal plastically flow by pushing the working tool 1 against a metal plate 30 while rotating it. A projecting part 1c is provided in the edge part of the working surface of the working tool 1. The metal which is going to move to the side part of the working tool 1 is pushed back because this projecting part 1c turns into a wall. Thus, the generation of burrs and recessed parts on the back of the metal plate 30 is suppressed. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
