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:
Nov. 19, 2013
Filed:
Jun. 18, 2010
Markus Heinloth, HeinlothPostbauer-Heng, DE;
Jürgen Bär, Fürth, DE;
Helmut Klein, Abenberg, DE;
Ralf Klötzer, Langewiesen, DE;
Markus Heinloth, HeinlothPostbauer-Heng, DE;
Jürgen Bär, Fürth, DE;
Helmut Klein, Abenberg, DE;
Ralf Klötzer, Langewiesen, DE;
Kennametal Inc., Latrobe, PA (US);
Abstract
The invention relates to a method and a device for the precision machining of crankshafts or camshafts to final size tolerances R<10 μm, preferably ≦5 μm and concentricity tolerances≦30 μM, preferably 6 μm. The crankshafts or camshafts has been machined by a cutting operation and at least partly subjected to hardening. According to the invention, after an initial cutting operation and subsequent hardening to 45 to 60 HRC, preferably 50 to 53 HRC, a final cutting operation is carried out using cutting inserts fitted with CBN or PCD inlets. The device used for this purpose has cutting inserts which are fitted with CBN or PCD inlets, wherein cutting inserts clamped in place laterally, radially and tangentially follow each other alternately.