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METAL SPINNING / DEEP DRAWING

Sometimes a casting can be refined by the metal spinning process. Especially where symmetrical thin cast shells are used, spinning can provide grain structure refinement through mechanical working of the metal, as well as dimensional accuracy and closer control of tolerances.

Metal spinning is an ideal process to use where other methods cannot be justified because the component shapes are too complicated or the production quantities are too small to amortize the necessary press tooling. Spinning may even be more economical for large quantities where extensive tooling is necessary to produce a given component by another method. This is most certainly true for large diameter parts.

Finally, for some component shapes, the most economical solution may be a combination of spinning and deep drawing. Quite frequently, parts of considerable depth can be produced very economically by using both processes. The preliminary draw operations can be performed on a standard set of draw tools, then the work piece is subsequently spun to final shape on a spinning mandrel.

Aside from special applications, the parent form for spun parts is usually a circular flat blank. To achieve some contours, a blank may be preformed by pressing or by welding developed segments together prior to spinning.

The important thing is to think of spinning as a metal forming process that can be integrated at any stage in the production of an item, rather than only as a total means of making it. Working closely with a metal spinning source will make it easier to achieve the most efficient combination of processes to produce a given component.

History of Metal Spinning
Description
General
Advantages of Metal Spinning
Tooling
Spinning/Deep Drawing
Design Suggestions

The text in this primer is printed with permission of the PMA.

metal spinning: spun metal parts



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