Winding method for heat-treated wire with varying dia. - has central cylindrical wire section pre-curved before coiling, and end sections are coiled elastically

摘要

The method is for the winding of coils having concentric windings, of heat-treated wire, esp. spring steel. The wire consists of bi-conical sequences with periodically changing dias. One sequence has a central cylindrical section with larger dia, with conical transfer sections on either side, extending into sections with smaller dias. Before coiling, the wire is pre-bent plastically in the central section, with a given radius of curvature (R1). The transfer and smaller dia. sections are coiled elastically. The central and non-cylindrical sections are pre-bend to a max. dia. dx. Below this dia, and in the end sections, coiling takes place elastically. USE/ADVANTAGE - Simple coiling process for heat treated wire with varying dia.