| Popis: |
Measurement of the geometric characteristics of products in mechanical engineering is currently carried out mainly using Coordinate Measuring Machines. One of the important scientific and practical tasks is to increase the performance of Coordinate Measuring Machines. The performance of Coordinate Measuring Machines depends on many factors of different physical nature. To be able to simulate the measurement process at the design and operation stages of Coordinate Measuring Machines, it is necessary to create a mathematical model. The article presents the new model based on the equations of system dynamics. To do this, a classification of parameters affecting performance is made, a graph of cause-effect relationships is constructed, and a system of differential equations is compiled. As an example, the mathematical model of a six-axis Coordinate Measuring Machine Lapik KIM-750 is considered. The study identified 25 main parameters, affecting performance, of which 16 are internal, 3 are external, 3 are constants. The performance and measurement uncertainty were simulated for short (1 h) and long (1 year) time intervals. It has been established that a great potential for increasing productivity is hidden in the calibration procedure and layout of control points on various types of product surfaces. |
