As shown in the figure, this method is only after one spinning can form a conical part from the slab material, the outer diameter of the blank remains unchanged, and the wall thickness of the finished product is thinner than that of the slab material. If half of the cone Angle of the part is between 12° and 80°, such a processing method is generally selected.

The forming time of this spinning method is short, the forming accuracy is high, and the shape of the blank plate is not necessarily round.

As shown in the figure, in the process of processing this method, the rotary wheel goes deep into the large diameter pipe or cone, contacts with its inner wall and expands the diameter. Because the material is subjected to tensile deformation, it cannot produce large deformation. When the blank diameter is small, the spinning wheel cannot be extended into it, so the use of this spinning method is limited.

Because the amount of deformation of such a processing method is not very large, usually many times the coiled welding parts are used as blank materials.

As shown in the figure, a round plate is installed on the core mold to rotate the main shaft, and the spinning wheel is pushed to move along the core mold and form. During the processing, the spinning wheel is reciprocated several times along the dotted line track shown in the figure, and the final shape is gradually formed. This processing method is called multi pass deep drawing and spinning.            

This spinning method is the most commonly used spinning processing method. It can make a variety of shapes and control the wall thickness of products after spinning when the material ductility allows. However, the preparation of its trajectory is very complex, which requires a high level of process personnel.

As shown in the figure, this is a spinning method that uses the end or middle part of the tube or cylindrical blank to produce diameter shrinkage through the processing method of deep drawing and spinning. The final shape is obtained by drawing the wool repeatedly while the rotating wheel is moved along the shaft of the blank.

This spinning method can not only form, but also achieve the effect of increasing the wall thickness.

As shown in the figure, such a spinning method is through a pair of rotating wheels that can be clamped tightly open, clamping the edge of the material, through the rotation of the rotating wheel itself and along the track, so that 90 straight edges or circular flanges can be processed for cylindrical parts.

Such a processing method is mainly used to make air ducts, air collectors, impellers and other parts in the fan industry.