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:
Jul. 16, 2002
Filed:
Jul. 02, 2001
Toshinaka Shinbutsu, Ohtsuki, JP;
Minoru Yoshizawa, Ohtsuki, JP;
Shuichi Amano, Ohtsuki, JP;
Katsuyuki Nakata, Tokyo, JP;
Hiroshi Yoshikawa, Tokyo, JP;
Hiroshi Okino, Tokyo, JP;
Nissei Co., Ltd., Yamanashi-ken, JP;
Abstract
A round die type form rolling apparatus comprises: a pair of die moving blocks rotatably supporting a pair of round dies ; four beam shafts disposed around the rolling position of a work being rolled by the round dies and extending between the pair of die moving blocks ; and a push mechanism for moving the pair of die moving blocks toward each other. The die moving blocks are moved, guided by the beam shafts , toward each other and the reaction forces generated between a pair of the round dies by the rolling pressure are shared by the beam shafts to prevent the round dies from escaping outwardly upwardly due to the reaction force from the work that is generated when the rolling pressure is applied to the work. This arrangement improves the machining precision of the work.