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. 07, 2020
Filed:
Dec. 04, 2015
Safran Aircraft Engines, Paris, FR;
Olivier Ferry, Moissy-Cramayel, FR;
Arnaud Cambefort, Moissy-Cramayel, FR;
Charles Cleret De Langavant, Moissy-Cramayel, FR;
Pascal Courtin, Moissy-Cramayel, FR;
Nicolas Hardouin, Moissy-Cramayel, FR;
SAFRAN AIRCRAFT ENGINES, Paris, FR;
Abstract
The invention pertains to a method of manufacturing parts, where each part must satisfy a global dimensional requirement on a specific dimension of said part akin to a tolerance stack up comprising at least two tolerances, each tolerance corresponding to a characteristic dimension of the part, where: the global dimensional requirement is fixed so that the specific dimension of the parts has a mean μand a standard deviation oG lying in a global acceptance range constructed on the basis of one or more statistical criteria; a reference dimension is chosen from among the characteristic dimensions, and a mean μΓβ and a standard deviation oref of said reference dimension are calculated on the basis of a sample of collected parts; a range of acceptance for the other characteristic dimensions of the tolerance stack up constructed with the same statistical criterion or criteria as the global acceptance range is calculated on the basis of the global acceptance range and on the basis of the mean ITO and the standard deviation oref calculated for the reference dimension; the manufacture of parts is steered without verification of the reference dimension by using the acceptance range calculated for the other characteristic dimensions of the tolerance stack up by fitting the adjustment parameters of a manufacturing device so that each of the other characteristic dimensions of the tolerance stack up lie in the corresponding calculated acceptance range.