Abstract
The coordinate measuring technique appropriates to measure dimensional and geometric properties of a machine part. The result of the measuring is effected by several parameters, like the measuring method, the point sampling technique, and the mathematical processing of the measured coordinates. The current article investigates the effect of the point sampling methods in case of a free-form surface. Two methods are compared: the uniform matrix method, and the Halton-Zaremba quasi-random method. The number of measured points is investigated also. The free-form test surface was produced by ball-end milling, and the radius, the cylindricity and the surface profile error were assessed.
Highlights
The geometric accuracy of the free-form surface is the result of the cutting technology, but the measuring method ensures the feedback to the production
The aim of the research is to investigate the effect of the tool path strategies of ball-end milling on the micro and macro accuracy of a free form surface
The aim of the paper is to present the effect of the point sampling methods and the number of measure points (NoP) on the dimensional and geometric error in case of free form surface
Summary
The free-form surfaces are widely used in die and mould industry. The accuracy of the surfaces is critical in this application, because the shape of the mould is copied to the product. The geometric accuracy of the free-form surface is the result of the cutting technology, but the measuring method ensures the feedback to the production. The coordinate measuring technique appropriates to measure dimensional and geometric properties of a machine part. The measuring process is defined by several parameters and circumstances, which have effect on the measured results. The measuring method (contact or non-contact), the point sampling method, the mathematical method of the data processing are the most characteristic questions in case of coordinate measuring of free-form surfaces [1]
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