Sapphire dies (of single-crystal aluminum oxide) are used to obtain interfacial conditions along the contact surface of the die in a strip-drawing operation. Several solutions based on slip-line field analysis and upper-bound techniques are available for metal-forming problems. However, these solutions generally neglect elasticity and work-hardening and assume that friction is constant along th...

Replacement by aluminum for the closure panels is one of the common methods for lightening car body. However the application used to be limited into shallow drawing parts like hood because of its low stamping formability. As a solution to cover the low stamping formability of aluminum, Blow forming technology of aluminum which is one of the superplastic forming technologies has been researched ...

Growing demand for sustainable products has led to increased interest in the use of paperboard as a structural material. Paperboard products are almost exclusively manufactured by embossing, pulp molding, and bending processes. Other well-known forming methods, such as deep or stretch drawing, are only rarely applied to paperboard. This is primarily ascribed to the lack of knowledge concerning ...

Although deep drawing process in the macro scale are well developed, the known concepts cannot be applied to micro deep drawing through directly scale down the specimen and tooling size due to the so-called size effects. Therefore, tensile test and micro deep drawing experiments were conducted to generate the knowledge for the micro deep drawing process. Stainless steel 304 foils with 4 differe...

The demands for properties of deep-drawing materials are continuously growing, while new processing technologies and testing procedures to assess the deep-drawing properties are looked for. The formability of materials is influenced by all factors participating in the forming process, namely the sheet material, the product type, the tool and the production technology of a pressing. Indicative i...

In the present study, the finite element analysis of the hot deep drawing process of commercially pure (CP) titanium has been performed without the blank holder in order to investigate the influence of temperature (T), die radius (Rd) and blank diameter (D) on the maximum punch force (Fp) and minimum thickness of the blank (t). Tensile tests were first conducted to extract...