4 kinds of shapes of tensile parts and their characteristics

Tensile parts as a more special metal stamping parts in stamping processing, there are different shapes, specifications, types, according to the characteristics of deformation mechanics can be divided into: box-shaped parts (straight wall non-rotating body), round simple parts (refers to the straight wall rotating body), curved shape parts (refers to the curved surface rotating body) and non-rotating surface shape parts 4 types, its characteristics are described below:

1.the deformation characteristics of cylindrical parts

In the process of drawing, the deformation area is the flange part of the blank, and the other part is the force transfer area, which does not participate in the main deformation. Under the action of tangential compressive stress and radial tensile stress, the deformation of the blank deformation zone with tangential compression and radial elongation is produced. The ultimate deformation parameters are mainly limited by the bearing capacity of the blank transfer zone.

2. the deformation characteristics of box-shaped parts

The deformation property is the same as that of round and simple parts, the difference is that the deformation of tension and pressure is not evenly distributed on the periphery of the blank, the deformation of the rounded part is large, and the deformation of the straight part is small; On the periphery of the blank, there is interaction between the parts with large deformation degree and small deformation degree.

3. the deformation characteristics of curved parts

The outer circumference of the blank is a drawing deformation zone which is always stretched and always pressured. The middle part of the blank is a swelling deformation area under the action of two tensile stresses.

4. the deformation characteristics of non-rotating surface parts

The deformation zone of the drawing blank is also composed of the outer drawing deformation zone and the inner swelling deformation zone, but the distribution of the two kinds of deformation around the blank is uneven. When the curved flange parts are drawn deep, there is shear deformation in the deformation zone around the blank.