Cold Forming
Drawing (Sections, Wire, Tube)
Notes:
For making dished ends of hollow vessels flanges for water vessels, ball floats, electrical switchgear products and similar items, spinning can be a useful production technique. The spinning lathe and the former needed for simple jobs are relatively cheap but the process is labour intensive and needs significant skills.
With the introduction of hydraulic spinning machines, the scope for metal spinning has increased dramatically. Diameters up to 4,000 mm and thicknesses up to 25 mm can now be spun to close tolerances, maintained through short or long production runs. Tooling costs are much lower than press tools and there is a further advantage that differing material thicknesses can be tried on the same tool during product development.