Model approaches for closed-loop property control for flow forming

Advances in Industrial and Manufacturing Engineering

Bahman Arian¹  Frank Walther²  Julian Rozo Vasquez²  Werner Homberg³  Ansgar Trächtler³  Markus Riepold⁴ 

[1] Corresponding author.;Chair of Forming and Machining Technology (LUF), Paderborn University, Paderborn, Germany;Department of Materials Test Engineering (WPT), TU Dortmund University, Dortmund, Germany;Fraunhofer Institute for Mechatronic Systems Design (IEM), Paderborn, Germany;

关键词: Closed-loop control;    Geometrical model;    Material model;    Strain-induced α′-martensite;    Flow forming;    Micromagnetic analysis;   

DOI  :  

来源: DOAJ

【 摘 要 】

The implementation of control systems in metal forming processes improves product quality and productivity. By controlling workpiece properties during the process, beneficial effects caused by forming can be exploited and integrated in the product design. The overall goal of this investigation is to produce tailored tubular parts with a defined locally graded microstructure by means of reverse flow forming. For this purpose, the proposed system aims to control both the desired geometry of the workpiece and additionally the formation of strain-induced α′-martensite content in the metastable austenitic stainless steel AISI 304 L. The paper introduces an overall control scheme, a geometry model for describing the process and changes in the dimensions of the workpiece, as well as a material model for the process-induced formation of martensite, providing equations based on empirical data. Moreover, measurement systems providing a closed feedback loop are presented, including a novel softsensor for in-situ measurements of the martensite content.

【 授权许可】

Unknown