Method and installation for producing biconical wire

US6035686A · kind A · utility

Assignees

• Muhr und Bender · DE
• Neturen Co., Ltd. · JP

Inventors

• Thomas Muhr · Attendorn, DE
• Andreas Kleemann · Weißensee, DE
• Hartmut Saljé · Erfurt, DE
• Tesukazu Fukuhara · Shinagawa, JP
• Takao Yamazaki · Tokyo, JP

Key dates

• Filing date: Sep 29, 1998
• Grant date: Mar 14, 2000
• Expiry date: Sep 29, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C21D8/06
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method and an installation for producing biconical wire, i.e., wire with repeating cylindrical and conical wire sections from a cylindrical starting material, in particular for producing helical compression springs inexpensively by using hot forming to form the conical wire sections. The installation has a heating unit (1) and a forming unit (2). The embodiment also includes a cooling unit (3) downstream from the heating unit (1), a cooling unit (4) downstream from the forming unit (2), a roll control (5), a re-rolling unit (6) downstream from the forming unit (2), another heating unit (7) for annealing or tempering, a cooling unit (8) downstream from the additional heating unit (7), an uncoiler (9), a roller straightening apparatus (10) and a coiler (11).