Some considerations about the use of different sensors, in coordinate measuring of the small parts

Innovative Ideas in Science 2016

Drgan, L.^1

Technical University of Cluj-Napoca, North University Center of Baia Mare, IMTech Department, Dr. Victor Babe str., no. 62A, Baia Mare, Romania^1

关键词: Coordinate measuring;    Cover types;    Different shapes;    Geometric characteristics;    Geometrical property;    High-precision;    High-precision measurement;    Influence of humidity;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/200/1/012048/pdf
DOI  :  10.1088/1757-899X/200/1/012048

来源: IOP

【 摘 要 】

The paper presents some particular aspects associated with measuring of the small-size parts with high precision, manufactured by injection procedures. The coordinate measuring machine (CMM) are very used in process of measuring parts with different shapes, dimensions and materials of the most varied. It is studied by experiments, the influence of hygroscopicity on the geometrical properties of polyamide parts, using different types of measuring sensors. We selected a few pieces- cover type, with precision features dimensions and shape tolerances. To measure them was used some sensors which is equipped CMM ScopeCheck S 400 and equipment for dehumidifying. Starting from the need for high precision measurement of geometric characteristics of the parts obtained by injection of plastic, it has been found that the hygroscopicity has a significant influence. To achieve the purpose were used three types of measuring sensors under different conditions of keeping after manufacture. It was observed that the influence of humidity is significantly reduced if the parts are kept in exikator or vacuum dryer.