Apparatus movable by a coordinate measuring machine for positioning a measuring instrument with respect to a workpiece

US10507560B2 · kind B2 · utility

Assignee

• Carl Zeiss Industrielle Messtechnik GmbH · DE

Inventors

• Kurt Brenner · Satteldorf, DE
• Christian Bayer · Penzberg, DE
• Dieter Kaufmann · Heidenheim, DE
• Otto Steinecker · Aalen, DE
• Philipp Mayinger · Aalen, DE
• Tobias Held · Nördlingen, DE

Key dates

• Filing date: Mar 23, 2018
• Grant date: Dec 17, 2019
• Expiry date: Jul 21, 2038

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B23Q17/2471
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A positioning apparatus for positioning a tactile or optical roughness sensor, a probe or some other measuring instrument with respect to a workpiece can be secured to a movement device of a coordinate measuring machine. The positioning apparatus has a drive that produces a relative movement between two parts of the positioning apparatus, and an inhibiting device, which inhibits the relative movement between the two parts. For this purpose, the inhibiting device has a first friction element and a second friction element each having unlubricated friction surfaces. The friction surfaces are pressed against one another with a normal force that is not variable during the operation of the positioning apparatus. A coefficient of sliding friction that is less than 0.15 acts between the friction surfaces in the case of dryness and without lubrication. Typically, the inhibiting device is arranged in a flexspline of a strain wave gearing.