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Manufacturing challenges with fabrication of large size mechanical harmonic drives

Kosse, Vladis (2008) Manufacturing challenges with fabrication of large size mechanical harmonic drives. In Yarlagadda, Prasad & Gudimetla, Prasad (Eds.) Proceeding of the 9th Global Congress on Manufacturing and Management, 12-14 November 2008, Holiday Inn, Gold Coast, Queensland.

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Abstract

Mechanical harmonic transmissions are relatively new kind of drives having several unusual features. For example, they can provide reduction ratio up to 500:1 in one stage, have very small teeth module compared to conventional drives and very large number of teeth (up to 1000) on a flexible gear. If for conventional drives manufacturing methods are well-developed, fabrication of large size harmonic drives presents a challenge. For example, how to fabricate a thin shell of 1.7m in diameter and wall thickness of 30mm having high precision external teeth at one end and internal splines at the other end? It is so flexible that conventional fabrication methods become unsuitable. In this paper special fabrication methods are discussed that can be used for manufacturing of large size harmonic drive components. They include electro-slag welding and refining, the use of special expandable devices to locate and hold a flexible gear, welding peripheral parts of disks with wear resistant materials with subsequent machining and others. These fabrication methods proved to be effective and harmonic drives built with the use of these innovative technologies have been installed on heavy metallurgical equipment and successfully tested.

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ID Code: 26305
Item Type: Conference Paper
Keywords: Large harmonic drives, Manufacturing methods
ISBN: 9780980582703
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MECHANICAL ENGINEERING (091300) > Mechanical Engineering not elsewhere classified (091399)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MANUFACTURING ENGINEERING (091000) > Manufacturing Processes and Technologies (excl. Textiles) (091006)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > Schools > School of Engineering Systems
Copyright Owner: Copyright 2008 Queensland University of Technology
Deposited On: 14 Jul 2009 03:38
Last Modified: 09 Jun 2010 13:54

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