Automated construction of a fan blade model according to data of CAD profile measurements

Abstract

The principle of automated construction of a fan blade model according to the profile measurements performed in a CAD-system is presented. Automatic construction of the model is based on the results of measurements obtained in the course of the control measurement procedure. The process of the blade airfoil control with the use of a portal-type Coord3 Hera NT coordinate-measuring machine and a measuring head with a Renishaw PH10T probe is described. The main points of the check method and instrumentation measures are presented. For example, the principle of the fan blade fixing is considered, the process of measuring the position of the base surfaces and points is presented, the process of measuring the profile points coordinates is described, the geometric parameters obtained in the course of calculation of profile deviations are presented. A measured 3D model of the fan blade is created according to the data of the control measurement procedure, taking into account complementary construction tools. The order of work for the automation of constructing a three-dimensional blade model is described. The direction of further work is specified, related to carrying out strength calculations to create a hot model of the measured blade, and subsequent aerodynamic calculations of the resulting blade to determine the most efficient set of geometric parameters for robust optimization.

Prediction of product assembly errors using real part models

“…Следует отметить, что реальные поверхности деталей характеризуются сложной геометрией, которая может быть описана в параметрической или сплайновой формах. При учёте влияния реальной геометрии поверхностей математические модели позволяют учитывать характер сопряжений поверхностей и существенно повысить достоверность прогнозирования размерных параметров изделий [2].…”