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:
Jun. 28, 2022
Filed:
Aug. 05, 2019
Applicant:
The Boeing Company, Chicago, IL (US);
Inventors:
Michael Robert Chapman, Federal Way, WA (US);
Gordon Dale Davis, Marysville, WA (US);
Assignee:
The Boeing Company, Chicago, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29C 51/08 (2006.01); B29C 70/46 (2006.01); B29C 70/56 (2006.01); B29D 99/00 (2010.01); B29C 51/12 (2006.01); B29C 51/42 (2006.01); B29L 31/00 (2006.01); B29K 105/08 (2006.01); B29K 105/00 (2006.01); B29L 9/00 (2006.01);
U.S. Cl.
CPC ...
B29C 51/085 (2013.01); B29C 51/12 (2013.01); B29C 51/421 (2013.01); B29C 70/462 (2013.01); B29C 70/56 (2013.01); B29D 99/0003 (2013.01); B29K 2105/08 (2013.01); B29K 2105/256 (2013.01); B29L 2009/00 (2013.01); B29L 2031/001 (2013.01); B29L 2031/003 (2013.01); Y02T 50/40 (2013.01);
Abstract
A flexible punch and die are used to form a flat composite laminate charge into a stiffener having a desired cross sectional shape. A desired contour is formed in the stiffener by bending the punch and die. Ply wrinkling is avoided during contouring by maintaining those portions of the stiffener subject to wrinkling in tension as the contouring is being performed. Bridging of the plies during the contouring process is avoided by first contouring those sections of the stiffener that are subject to wrinkling, and then contouring the remaining sections of the stiffener.