Scholarlink

<p>Automotive body production is heavily supported by sheet metal forming, a process recognized for its high efficiency in large-scale applications. However, the advancements required by the sector go beyond productivity, also encompassing structural optimization, mechanical performance, and vehicle safety. The transition to electrification amplifies these demands, requiring materials and design strategies capable of meeting additional functional requirements. In this context, recent research has focused efforts on modernizing automotive structures, including the high-strength steels development with greater formability, the improvement of forming processes, and the adoption of innovative structural concepts. One such development is the application of a system for measuring the resistive force exerted on metal sheets during the modified Nakazima stamping test. Unlike the traditional method, the study incorporates additional variables such as Blank holder force (BHF) and drawbead (DB) geometry, aiming to provide a more precise analysis of the formability of Advanced High-Strength Steels (AHSS). Samples with dimensions of 200 × 200&#xa0;mm were used, where resistive forces resulting from the interaction between the tooling and the metal sheet were recorded. The developed system enabled the identification of force behavior in distinct regions of the part—flange, die radius, and punch pole—allowing the quantification of resistive force as a function of DB geometry and BHF intensity. The results highlight the significant impact of these variables on the performance of the forming process, contributing to a knowledge of mechanical behavior of materials and the optimization of solutions in the context of automotive engineering.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

An approach to understand stamping force behavior that enables the quantification of resistive force considering drawbead geometry and BHF intensity

  • 期刊论文

  • 发表日期：

    2026年3月17日

查看全文
  • Alex Raimundo de Oliveira,
  • Chetan Nikhare,
  • Ravilson Antonio Chemin Filho,
  • Paulo Victor Prestes Marcondes

摘要

Automotive body production is heavily supported by sheet metal forming, a process recognized for its high efficiency in large-scale applications. However, the advancements required by the sector go beyond productivity, also encompassing structural optimization, mechanical performance, and vehicle safety. The transition to electrification amplifies these demands, requiring materials and design strategies capable of meeting additional functional requirements. In this context, recent research has focused efforts on modernizing automotive structures, including the high-strength steels development with greater formability, the improvement of forming processes, and the adoption of innovative structural concepts. One such development is the application of a system for measuring the resistive force exerted on metal sheets during the modified Nakazima stamping test. Unlike the traditional method, the study incorporates additional variables such as Blank holder force (BHF) and drawbead (DB) geometry, aiming to provide a more precise analysis of the formability of Advanced High-Strength Steels (AHSS). Samples with dimensions of 200 × 200 mm were used, where resistive forces resulting from the interaction between the tooling and the metal sheet were recorded. The developed system enabled the identification of force behavior in distinct regions of the part—flange, die radius, and punch pole—allowing the quantification of resistive force as a function of DB geometry and BHF intensity. The results highlight the significant impact of these variables on the performance of the forming process, contributing to a knowledge of mechanical behavior of materials and the optimization of solutions in the context of automotive engineering.