Process for the manufacture of a gear wheel in an internal greared

US5359771A · kind A · utility

Assignee

• Schwabische Huttenwerke GmbH · DE

Inventors

• Michael E. Krehl · Corunna, US
• Rolf Schwarze · Aalen, DE
• Gerhard Subek · Aalen, DE

Key dates

• Filing date: Apr 28, 1993
• Grant date: Nov 1, 1994
• Expiry date: Apr 28, 2013

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/19916
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

In a process for the manufacture of a gear wheel in an internal geared wheel pump, which wheel consist of two half-wheels (2A, 2B), which are respectively equipped with overflow ducts (3) constructed as half cavities (4A, 4B), into which balls can be inserted, the half-wheels (3A, 3B) are joined so that the complete overflow ducts (3) are formed from the half-cavities (4A, 4B) and the teeth (5) of the gear wheel (1) lie over one another in alignment. The insertion of any valve balls into the half-cavities (4A or 4B) of a half-wheel (2A or 2B) is performed before a welding operation and the half-wheels (2A, 2B) undergo a capacitor discharge welding process.