A fast and accurate non-contact profiling instrument for assessing areal surface texture and flatness

摘要

Surface texture and surface form deviation of industrial products are significant geometrical specifications. Practical measuring instruments to measure and evaluate those specifications are expected to come onto the market. The surface form data is generally composed of discrete sampling points and so it is needed to trace a point- or spot-type displacement sensor relatively over an object surface. Although ISO/TC213 (Technical committee on dimensional and geometrical product specifications and verification) has discussed about the assessments of straightness, flatness and so on, the final agreements have not been attained due to the difficulties to guarantee their consistency. As to the areal surface texture, the official discussion has been just started. In this study, the novel measurement principle for evaluating both flatness and surface texture of machined products is proposed. Their extraction and filtration procedures are developed in due consideration of utilized displacement sensors.