Automatic sampling for CMM inspection planning of free-form surfaces

An intelligent sampling method for inspecting free-form surfaces

The two most important factors in sampling during coordinate verification of a surface are the number of measuring points that accurately represent the surface and the distribution of those points. Three algorithms are developed in this paper for sampling of free-form surfaces at a patch scale (not the entire surface). The three developed algorithms take each patch on the surface as a separate ...

Tool Path Planning for Machining Free-form Surfaces

This paper is about new iso-parametric tool path planning for machining trimmed freeform surfaces. The trimmed surface has been re-parameterized by two different parameterization techniques, namely, the partial differential equation method and the newly developed boundary interpolation method. The efficiency of the scheme has been measured in terms of path length and computational time needed f...

Iso-level tool path planning for free-form surfaces

The aim of tool path planning is to maximize the efficiency against some given precision criteria. In practice, scallop height should be kept constant to avoid unnecessary cutting, while the tool path should be smooth enough to maintain a high feed rate. However, iso-scallop and smoothness often conflict with each other. Existing methods smooth iso-scallop paths one-by-one, which make the final...

Cmm Measurement and Evaluation of Models with Trimmed Free-form Surfaces

INTRODUCTION Free-form surfaces are used in product design, either to deliver certain functionality, or for aesthetic purposes. The realization of models with free-form surfaces involves metal removal processes whose output is either the desired product, or a die/mould cavity for the desired product. This process is affected by various sources of error, which cause the geometry of the manufactu...

Free-Form Surface Matching for Surface Inspection