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:
Jan. 13, 1998
Filed:
Sep. 06, 1995
Shunitsu Ito, Ichinomiya, JP;
Murata Kikai Kabushiki Kaisha, Kyoto, JP;
Abstract
A control apparatus which increases a hit rate, stabilizes a punch process, and makes use of a small motor. Such control apparatus is applicable to a punch drive apparatus that drives a punch tool by a servomotor via a ram and a toggle system. Such a structural arrangement includes a memory that memorizes a ram speed curve line from when the servomotor starts rotating to when the ram achieves a fixed speed; another memory that memorizes a surface height position of a sheet metal; and calculating device that calculates the lowest height of the ram at the aforementioned fixed speed when the punch tool reaches the surface of the sheet metal, and then sets a raised stand-by position of the ram. Such raised stand-by position is set in a ram shaft control device having the servo-controller.