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:
Dec. 13, 1983
Filed:
Mar. 23, 1981
Heinz Voigt, Wuppertal, DE;
Martin Wolters, Wuppertal, DE;
Ernst Thielenhaus KG, Wuppertal, DE;
Abstract
A rough-ground camshaft has a shaft extending along and defining an axis and carrying a plurality of axially spaced cams each having a cam surface. This camshaft is finish-ground in system wherein for each cam there is a respective coarse prefinish tool and a respective fine finish tool. Every other cam surface is engaged in one diametrial direction by the respective coarse prefinish tool and in the opposite diametrical direction by the respective fine finish tool, and vice versa for the remaining cams, so that the prefinish tools, like the finish tools, alternate to opposite side of the camshaft axis. The camshaft is rotated about its axis and to start with all of the tools are urged against the respective cams, so that each cam is engaged in one diametrical direction by the respective prefinish tool and in the opposite direction by the respective fine finish tool. This shapes the tools, whereupon the fine finish tools are retracted for prefinishing of the cam surfaces. Then the prefinish tools are retracted and the fine finish tools are engaged with the cams for fine-finishing.