A feature-based inspection planning system for coordinate measuring machines

Abstract

A feature-based inspection planning system is proposed in this research to develop more efficient measuring methodology for a CMM for complicated workpieces having many primitive form features. The proposed strategy is composed of two stages; global inspection planning and local inspection planning stages. In the global inspection planning stage, the system generates an optimum inspection sequence of the features in a part. The sequence is determined by analyzing the feature information such as the nested relations and the possible probe approach directions of the features, and by forming feature groups. A series of heuristic rules are developed to accomplish it. In the local inspection planning stage, each feature is decomposed into its constituent geometric elements, and then the number of sampling points, the locations of the points and the optimum probing sequence are determined. Also, an effective collision avoidance methodology is proposed. After required simulation, the effectiveness of the proposed system is verified.

Design verification and validation in product lifecycle

“…Computer Aided Inspection Planning (CAIP) systems have been developed to accomplish the measurement planning task by the following generic procedures: (1) CAD interface and feature recognition, (2) determination of the inspection sequence of the features of a part, (3) determination of the number of measuring points and their locations, (4) determination of the measuring paths, and (5) simulation and verification [149]. The stages of CAIP for Co-ordinate Measuring Machines (CMMs), are defined as; establish the best sequence of inspection steps, the detailed inspection procedure of each feature, feature accessibility by probes, probe path planning and collision checking, generating the CMM control commands, and the post-processing of measured data such as statistical and cost analysis [150].…”

The system of measurement accuracy prediction, based on Coordinate Measuring Machine simulator and its virtual model

“…Żaden z dostępnych na rynku systemów komputerowego wspomagania strategii pomiarowej [4,5] nie uwzględnia dokładności pomiaru systemu pomiarowego. Z tego powodu autorzy postanowili opracować koncepcję systemu pozwalającego na określenie niepewności pomiaru przed jego przeprowadzeniem na realnej maszynie, aby po analizie potencjalnych strategii pomiarowych możliwy był wybór gwarantujący najlepszą dokładność.…”

A design and inspection based methodology for form-function reverse engineering of mechanical components

“…With the inspection process, planning is done to determine the measurement strategy based on the feature types within a component [33][34][35]. Various instrumentation may be utilized based on the component's characteristics, as tight tolerances for callouts such as runout, flatness and cylindricity may require specialty measuring instruments.…”