I. Correct Selection of Stretching Direction

In stamping continuous stretching, there are two types: upward and downward stretching (positive and negative stretching). For relatively lower height stretching, it is recommended to use downward stretching, which has a simpler structure. When the stretching height is higher, upward stretching is typically used, mainly to facilitate feeding and ensure the stability of product feeding.

II. Correct Selection of Flanging Rings

Generally, independent blank holding force or flanging rings are required in stretching processes. Subsequent stretching processes only need to be completed by closing the mold to ensure the flange is flattened.

III. Selection of Unloading Structure

It is generally recommended to use elastic unloading devices. To ensure unloading effectiveness, rigid or semi-rigid unloading can also be adopted, but space must be reserved for floating material.