Resumen

In an ever-changing market with growing demands on the grounds of personalization and rapid prototyping, a process like Single Point Incremental Forming (SPIF) stays relevant for its flexibility and ability to create complex asymmetric shapes without the need of expensive forming dies with the help of an available CNC milling machine.

In the present work, the formability limits of SPIF are explored for sheet metal of stainless steel Stainless Steel AISI - 304 and a thickness of 0.45mm are experimentally measured using Variable Wall Angle quadrangular frusta and finding the maximum forming wall angle.

Also, the effects of anisotropy on wall angle and shell thickness of the frusta (pyramids) on a FEM based simulation are analyzed by means of including true stress-effective strain curve values for 0°, 45° and 90° with respect to the rolling direction of the sheet metal. The results are then compared and evaluated against physical experimental results.

Finally, on the formability analysis an average 79.6° maximum wall angle was found for 0.45mm thick Stainless Steel AISI - 304. Furthermore, the FEM simulation model showed some effects due to the anisotropy of the material, especially on the wall thickness of the parts for 45° with respect to the rolling direction. On the other hand, the simulation proved to need some improvements when compared to the experimental results, especially on the predictability of wall angle. Some recommendations and further work to be done were outlined in the conclusions

Palabras clave: incremental forming, SS304, anisotropy, formability,.

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Table of content

Portada

Agradecimientos y Dedicatorias

Índices

Capítulo 1. Introduction

Capítulo 2. Literature Review

Capítulo 3. Methodology

Capítulo 4. Results and Discussion

Capítulo 5. Conclusions and Outlook

Referencias

Apéndice A. Additional Figures

Apéndice B. Technical Specifications of the Utilized Equipment

Apéndice C. Python Sub-Routines

Full document (archivo pdf, 2 mb)

Quiroz Vázquez, E. J. 2018. Study on formability and anisotropy effects on Single Point Incremental Forming of Stainless Steel AISI - 304. Tesis Licenciatura. Ingeniería Mecánica. Departamento de Ingeniería Industrial y Mecánica, Escuela de Ingeniería, Universidad de las Américas Puebla. Diciembre. Derechos Reservados © 2018.