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. 24, 2001
Filed:
Nov. 30, 1999
Masashi Tado, Iyomishima, JP;
Koichi Kondo, Niihama, JP;
Sumitomo Heavy Industries, Ltd., Tokyo, JP;
Abstract
The present invention relates to a forming press of crankshafts which is safe, has a slide of large strength and high forming precision, and is capable of high-speed cyclic operation. A forming press of crankshafts includes a forging unit for twisting and a forging unit for reshaping, wherein (i) a twisting oil-hydraulic cylinder is mounted on the crown, (ii) twisting push rods are disposed along outer surfaces of the slide, and (iii) the bottom ends of the twisting push rods are connected by twisting-down beams and untwisting beams. The slide is of inverted T-form in section, and the pressing block is of H-form as seen from above and of inverted U-form as seen from one side. Therefore, they do not interfere with each other and a large stroke can be secured. The twisting angle is set using an upper stopper provided in the pressing block and an automatic telescopic lower stopper provided in the slide and freely movable toward and away from the upper stopper. An upper guide and a lower guide are provided between the pressing block and the slide. Each guide directs four portions, around the lower stopper, of the pressing block against its forward, backward, rightward, and leftward deviation.