Method and apparatus for measuring the configuration of cylinder bores in workpieces

US4986004A · kind A · utility

Assignee

• PAT Messtechnik GmbH · DE

Inventors

• Rudolf Hartmann · Waldbronn, DE
• Knud Overlach · Ettlingen, DE
• Gunter Suchanek · Ettlingen, DE

Key dates

• Filing date: Jan 3, 1990
• Grant date: Jan 22, 1991
• Expiry date: Jan 3, 2010

Classification

• Technology area (CPC G): Physics
• CPC primary: G01B5/207
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

For the purposes of measuring the configuration of cylinder bores, at least one measuring probe with a plurality of measuring sensors each having respective radially projecting sensing pins is introduced into the cylinder bore, without the sensing pins touching the cylinder bore, and the sensing pins are then brought into contact with the cylinder wall by relative displacement of the workpiece and the measuring probe with respect to each other. Thereupon the measuring head is fixed with respect to the workpiece and that fixing is maintained by means of a biasing force, whereupon, with the workpiece resiliently seated and with the measuring head decoupled from members which produced the advance movement thereof, the configuration of the cylinder bores is measured by sensing by means of the sensing pins on adjacent parallel circles. The apparatus has at least one measuring probe but preferably a plurality of measuring probes which are arranged in terms of number and position in accordance with the cylinder bores to be measured, the measuring probe or probes being associated with a measuring head which can be decoupled in the measuring position.