Accession Number : AD1028171

Title :   Advanced Machining Toolpath for Low Distortion

Descriptive Note : Technical Report,01 Sep 2016,31 Dec 2016

Corporate Author : Third Wave Systems, Inc. Eden Prairie United States

Personal Author(s) : Becker,Brian

Full Text :

Report Date : 28 Feb 2017

Pagination or Media Count : 20

Abstract : Third Wave Systems (TWS) completed a project funded by the Aviation Development Directorate (ADD) to minimize distortion in an aluminum fatigue coupon machining process. To achieve the objective of this project, TWS utilized its Production Module NC toolpath optimization, AdvantEdge finite element modeling, and distortion modeling software packages. Efforts in Production Module consisted of setting up an analysis of cutting forces across the fatigue coupon toolpath and optimizing these forces to level cutting loads and reduce force spikes. AdvantEdge was utilized to perform detailed finite element simulations of the finish machining toolpath with a focus on understanding the depth and magnitude of machining induced stresses imparted in the workpiece surface. Efforts in the distortion modeling software focused on simulating final part distortion due to the initial bulk stress in the aluminum stock material. TWS performed experimental tests in house to measure the initial bulk stress profiles that were used in the distortion modeling simulations. The outcome of this project was delivery of an optimized NC toolpath that reflected the modeling efforts to minimize final part distortion.

Descriptors :   machining , aluminum , fatigue(mechanics) , stress analysis , distortion , materials , cutting tools

Subject Categories : Fabrication Metallurgy

Distribution Statement : APPROVED FOR PUBLIC RELEASE