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Laser turning of watch component shaft

IP.com Disclosure Number: IPCOM000256526D
Publication Date: 2018-Dec-06

Publishing Venue

The IP.com Prior Art Database

Abstract

Laser turning of simplified escapement shafts, including pivots, in Nivaflex® metallic alloy (see figure 1) has been demonstrated. This grade is known for its low machinability that leads to rapid wear of carbide cutting tools. All dimensional features of the shaft, including pivots, are well performed with extremely low dispersion. The quality surface right after laser turning was measured slightly worse than the required specifications for shaft produced by standard turning plus a cold rolling. In order to obtain a surface quality equivalent to finished cold rolled pivots in 20AP, a simple tumbler polishing was performed on laser turned shafts. Final rendering was particularly good with a surface roughness even better than rolled part and dimensional features still inside the accepted tolerances.