| 摘要 |
PROBLEM TO BE SOLVED: To provide a press drawing method capable of press-drawing a reflecting surface with a condensing function with high accuracy, and a die to be used for the method. SOLUTION: In the press drawing method, a metal plate 10' is mounted on a fixed die 21 comprising a lower die 22 and a core 23, and the metal plate 10' is pressed to form a reflecting curved surface 11 by a movable die 25 comprising an upper die 26 and a punch 27. A boundary portion 13 between a non-pressed portion 12 of the metal plate 10' and a pressed portion 11' of the reflecting curved surface is compressed. Compression to 70% of the thickness before compression is most preferable. COPYRIGHT: (C)2005,JPO&NCIPI
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