Method for manufacturing a thread-forming screw

US8696477B2 · kind B2 · utility

Assignee

• Hilti Aktiengesellschaft · LI

Inventors

• Franz Huber · Türkheim, DE
• Martin Pleil · Feldkirch, AT
• Carl Hoffmann · Bodolz, DE
• Andreas Vorhauer · Rankweil, AT
• Simon Oppeneiger · Lustenau, AT
• Berthold Aumueller · Grafenau, DE
• Georg Oberndorfer · Feldkirch, AT
• Juergen Gahn · Schlieren, CH
• Corinna Achleitner · Bludenz, AT

Key dates

• Filing date: Dec 16, 2009
• Grant date: Apr 15, 2014
• Expiry date: Jan 27, 2032

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16B25/0068
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A method for manufacturing a thread-forming screw having a shank and a thread formed in one piece with the shank and region-wise circumferentially arranged on the shank, is disclosed. After the formation of the thread on the shank, a plurality of recesses is subsequently stamped into the thread. Then, a plurality of compact cutting elements is welded into the recesses in the thread, where the cutting elements are made of a hard material and have a hardness greater than the hardness of the thread. Additionally, a stamping device for carrying out the method is also disclosed.