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:
May. 23, 1995
Filed:
Jun. 17, 1992
Charles S Cook, Pittsburgh, PA (US);
Edward S Diaz, Monroeville, PA (US);
Westinghouse Electric Corporation, Pittsburgh, PA (US);
Abstract
A production measuring system is provided for early identification of dimensional or operational problems in a pilger forming device. The forming device has a mandrel for supporting a tubular workpiece to be elongated and thinned, at least two opposed dies bearing against the workpiece, and a mechanical drive for rolling the dies over the workpiece under pressure while periodically rotating and advancing the workpiece along the mandrel. Sensors are directed at the workpiece and produce signals reflecting displacement of the workpiece in rotation, axial displacement and transverse displacement. The signals can be compared to nominal standards and/or graphed and displayed, for visualizing operational conditions. The sensors can be disposed axially before or after the dies, or both. Preferably, idler rollers coupled to rotary variable differential transformers encode axial and rotational displacement after the dies (on the formed workpiece), and a pair of non-contacting proximity sensors disposed at right angles encode transverse displacement of the workpiece before the dies.