Simple friction weld

US10066579B2 · kind B2 · utility

Inventors

• Volker Gniesmer · Alfeld, DE
• Gerhard Luz · Bietigheim-Bissingen, DE
• Jochem Müller · Neuenstein, DE
• Christian Schaller

Key dates

• Filing date: Jul 9, 2015
• Grant date: Sep 4, 2018
• Expiry date: Feb 19, 2036

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49249
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A cooling channel piston for an internal combustion engine which includes a piston bottom and a piston shaft that are joined thereto of a friction welding process. The piston bottom and the piston shaft jointly form a cooling channel. An annular wall which radially delimits the cooling channel towards the outside is formed by the piston bottom and/or the piston shaft. The annular wall can be sealed by a welding process once the piston bottom and the piston shaft have been joined together.