According to the strain testing results,metallurgical structure of key testing points of the punching parts were analyzed and distortion of lattice were observed to study springback mechanism of multi-angle draw-bending forming.

Simulation of stretch bending forming process of stainless section steel;

Traditional stretch bending forming usually needs a rigid die to form a part.

A numerical study on the force-controlled stretch bending of aluminum extrusion with complex cross section;

The key to numerical simulation of stretch bending of extrusions is determination of loading path of the clamped ends of extrusion.

An experimental study on stretch bending of aluminum extrusion was conducted under different pre- and post-stretching elongation.

In this paper the stretch bend forming process of stainless steel profiles with angle shape cross section is researched by the PS2F(Profile Stretch 2D Forming) software special for the simulating of stretch bend forming process.

The stretch-wrap bending formability for profile is much more difficult to analyze and to evaluate than that for sheet forming.

In order to characterize stretch-wrap bending formability quantificationally,the concept of stretch-wrap bending formability diagram of profile was presented.

The influence of correlation factors on stretch-wrap bending formability of profile are complex and the influence of processing parameters and sectional dimensions are essential.

However,compared to the traditional single-layer bending process,contact stress between fins and bending die of multilayer bending forming process is much larger.