| 摘要 |
PROBLEM TO BE SOLVED: To facilitate extraction of manufactured goods from a punch of a box tube bending die used at the time of manufacturing the goods of a box or tubular shape and to improve the supporting strength of the punch. SOLUTION: The box tube bending die is equipped with a pair of holders 11 and 12 mounted on an upper table, the punch 15 which is freely turnably supported via a turning shaft 16 on the one holder 11 and is supported on an abutting surface 19 of the other holder 12 and a pressure plate 22 which is freely turnably mounted on the holder 12 formed by the abutting surface 19 and fixes the punch 15. COPYRIGHT: (C)2006,JPO&NCIPI
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