Development and Research of a Profile Recorder for Measuring Deviations in the Shape of the Surface of Products by Laser Spiral Scanning

Abstract

Introduction. The paper deals with the development of a Profile recorder and measurement of deviations in the shape of the surface of products by laser spiral scanning. Analysis of the scientific literature shows that at present, the issues of monitoring and evaluating deviations in the shape of the surface of products require further research, since the use of well-known devices and methods does not always provide the necessary accuracy, manufacturability and sufficient information content of measurements. The research urgency is caused by the fact that existing methods of measuring form deviations of the surfaces does not allow to define a set of parameters with the required accuracy and submit it to two-dimensional and three-dimensional form. Objective: to develop a new method for evaluating a three-dimensional profile by implementing the method of laser spiral scanning and study the Profile recorder to improve the accuracy and productivity of measuring deviations in the shape of the product surface. Methods. The paper proposes a new method for evaluating a three-dimensional surface profile in order to directly determine the shape of the surface of products, to control the quality of the surface of products, regardless of its location. To implement the method, a Profile recorder of an original design is developed and investigated, which provides measurement of two parameters along the Archimedean spiral. Optimization of the design and the method of presenting information for measuring deviations in the shape of the surface of products are performed. Results and discussion. A method of statistical estimation of equations for describing the shape of metal surfaces based on the use of classical laws is proposed. In the case of a flat surface, deviations from flatness are evaluated: undulation, warping, twisting, convexity, concavity, curvature, etc. A Profile recorder is developed to implement the proposed method. The automated mechatronic device and the proposed method are tested on corrugated surfaces. Various equations obtained as a result of statistical processing were compared with each other, and the equation with the highest coefficient of determination is selected. The Profile recorder in Cartesian coordinates is studied in order to obtain reliable and accurate data for estimating shape deviations. The values of the deflection and the size of the corrugation along the height of the C-9 corrugated sheet are determined by laser spiral scanning.