METHOD FOR FORMING STEEL PLATE BY HOT PRESS

WIPO Patent Application WO/2012/011224

A1

The present invention reduces energy consumption to a minimum to cut running costs, continuously obtains final formed products with stable quality, and has high productivity. Specifically, a primary forming step (4) for forming a primary formed product (p1) by plastic-working a heated steel plate for a predetermined period of time by a primary forming die (42), a secondary forming step (5) for forming a secondary formed product (p2) by machining the primary formed product (p1) for a predetermined period of time by a secondary forming die (52), and a quenching step (6) for obtaining a final formed product (P) quenched by holding the secondary formed product (p2) under pressure over a longer period of time than in the primary forming step (4) and secondary forming step (5) by a cooling die (62) set in a servo motor-controlled hydraulic press (61) are sequentially and continuously performed. The quenching step (6) is performed independently without coordinating with the primary forming step (4) and the secondary forming step (5). During a period until the quenching step (6) is completed, both the primary forming step (4) and the secondary forming step (5) were completed, and the primary formed product (p1) and the secondary formed product (p2) are apart from the pressurization surfaces of the respective dies.

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TAKASUE, Tekkan (3-1 Shinchi, Fuchu-cho, Aki-gu, Hiroshima 70, 〒7308670, JP)
高末　鉄幹 (〒70 広島県安芸郡府中町新地３番１号マツダ株式会社内 Hiroshima, 〒7308670, JP)
ISHIDA, Kyousou (3-1 Shinchi, Fuchu-cho, Aki-gu, Hiroshima 70, 〒7308670, JP)
石田　恭聡 (〒70 広島県安芸郡府中町新地３番１号マツダ株式会社内 Hiroshima, 〒7308670, JP)
HIRONAKA, Kouji (7-17, Yaga-shinmachi 5-chome, Higashi-ku, Hiroshima-sh, Hiroshima 44, 〒7320044, JP)
広中　浩二 (〒44 広島県広島市東区矢賀新町５丁目７番１７号株式会社今西製作所内 Hiroshima, 〒7320044, JP)
YAMAZAKI, Takuya (10-1, Agaminami 2-chome, Kure-sh, Hiroshima 04, 〒7370004, JP)
山崎　拓哉 (〒04 広島県呉市阿賀南２丁目１０－１株式会社積層金型内 Hiroshima, 〒7370004, JP)

JP2011/003537

January 26, 2012

June 21, 2011

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MAZDA MOTOR CORPORATION (3-1 Shinchi, Fuchu-cho Aki-gu, Hiroshima 70, 〒7308670, JP)
マツダ株式会社 (〒70 広島県安芸郡府中町新地３番１号 Hiroshima, 〒7308670, JP)
IMANISHI MANUFACTURING CO., LTD. (7-17, Yaga-shinmachi 5-chome Higashi-ku, Hiroshima-sh, Hiroshima 44, 〒7320044, JP)
株式会社今西製作所 (〒44 広島県広島市東区矢賀新町５丁目７番１７号 Hiroshima, 〒7320044, JP)
SEKISOU KANAGATA CO., LTD. (10-1, Agaminami 2-chome Kure-sh, Hiroshima 04, 〒7370004, JP)
株式会社積層金型 (〒04 広島県呉市阿賀南２丁目１０－１ Hiroshima, 〒7370004, JP)
KEYLEX CORPORATION (2-51, Minami Myoujin-Machi Kaita-cho, Aki-gu, Hiroshima 55, 〒7360055, JP)
株式会社キーレックス (〒55 広島県安芸郡海田町南明神町２番５１号 Hiroshima, 〒7360055, JP)
TAKASUE, Tekkan (3-1 Shinchi, Fuchu-cho, Aki-gu, Hiroshima 70, 〒7308670, JP)
高末　鉄幹 (〒70 広島県安芸郡府中町新地３番１号マツダ株式会社内 Hiroshima, 〒7308670, JP)
ISHIDA, Kyousou (3-1 Shinchi, Fuchu-cho, Aki-gu, Hiroshima 70, 〒7308670, JP)
石田　恭聡 (〒70 広島県安芸郡府中町新地３番１号マツダ株式会社内 Hiroshima, 〒7308670, JP)

B21D24/00; B30B13/00; B30B15/34

MAEDA, Hiroshi et al. (Osaka-Marubeni Bldg, 5-7 Hommachi 2-chome, Chuo-ku, Osaka-sh, Osaka 53, 〒5410053, JP)

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