The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 26, 2016
Filed:
Jun. 21, 2011
Tekkan Takasue, Hiroshima, JP;
Kyousou Ishida, Hiroshima, JP;
Kouji Hironaka, Hiroshima, JP;
Takuya Yamazaki, Hiroshima, JP;
Kenichi Hatakeyama, Hiroshima, JP;
Shinichiro Kurusu, Hiroshima, JP;
Akihiro Nakashima, Hiroshima, JP;
Toshiharu Nakashima, Hiroshima, JP;
Tekkan Takasue, Hiroshima, JP;
Kyousou Ishida, Hiroshima, JP;
Kouji Hironaka, Hiroshima, JP;
Takuya Yamazaki, Hiroshima, JP;
Kenichi Hatakeyama, Hiroshima, JP;
Shinichiro Kurusu, Hiroshima, JP;
Akihiro Nakashima, Hiroshima, JP;
Toshiharu Nakashima, Hiroshima, JP;
MAZDA MOTOR CORPORATION, Hiroshima, JP;
IMANISHI MANUFACTURING CO., LTD., Hiroshima, JP;
SEKISOU KANAGATA CO., LTD., Hiroshima, JP;
KEYLEX CORPORATION, Hiroshima, JP;
Abstract
Consumed energy is minimized to reduce running cost. Final formed products of uniform quality are successively obtained. High productivity is provided. A primary forming step of obtaining a primary formed product by plastically working a heated steel sheet with a primary forming die set for a predetermined time period, a secondary forming step of machining the primary formed product with the secondary forming die set for a predetermined time period to obtain a secondary formed product, and a hardening step of allowing a cooling die set placed in a hydraulic press controlled by a servomotor to hold the secondary formed product under pressure for a longer time period than the time period of each of the primary and secondary forming steps to obtain a hardened final formed product are successively performed in sequence. The hardening step is performed independently without coordinating with the primary and secondary forming steps.