Method for estimating error propagation

US11144040B2 · kind B2 · utility

Assignee

• Sandvik Intellectual Property AB · SE

Inventors

• Peter Eriksson
• Vahid KALHORI · Gävle, SE
• Martin Helgoson · Sandviken, SE
• Anders Ivarsson · Storvik, SE

Key dates

• Filing date: Aug 16, 2017
• Grant date: Oct 12, 2021
• Expiry date: Aug 16, 2037

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P90/02
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A computer program includes data defining tool paths for manufacturing a component. The component geometry is estimated based on the program. Deviation of a first type is estimated as deviation between the estimated geometry and geometry of the component as defined by a 3D model. Deviation of a second type is estimated, based on machining process characteristics indicated by sensor data captured during manufacturing of the component, as deviation between a tool path a machine is instructed via the program to provide and an actual tool path provided by the machine. Deviation of a third type is computed as deviation between geometry defined by the 3D model and measured geometry of the manufactured component. An error propagation model is updated based on the estimated and computed deviations for multiple components. The error propagation model approximates relations between deviations of the first and second type and deviations of the third type.