Research On Key Technologies Of Curved-surface Patterning Via Direct-writing Based On Five-axis Motion Platform

The research on the Polymer Derived Ceramics(PDC)thin-film sensing technology,which can sense the working thermal parameters of engine blades,provide experimental data support for engine design and provide guidance for health monitoring of engine,has great development potential and strategic significance.However,the research on the preparation of thin-film sensors on blades and other curved surfaces is still in its infancy,there is a lack of integrated system development for curved surface inkjet printing,and the curved surface printing process has not yet formed a unified program and standard now.In this paper,a new high-precision trajectory planning algorithm software was designed by combining the five-axis motion platform with the direct-writing technology,and a five-axis direct-writing integrated software and hardware system was built to carry out the surface patterning direct-writing verification experiment.The specific research content includes:1.Research on the kinematics model of the five-axis motion platform.Two method,coordinate transformation method and D-H method in the current literature are separately used to establish the kinematics model,and obtain the kinematics positive solution,and through the inverse kinematics solution,the mathematical formula for the movement of each axis of the five-axis motion printing platform is obtained.And the results of the two methods are used to verify the correctness of the mathematical modeling,and the key issues such as the difficulty of the two methods and the scope of application conditions are described for the first time in this article,which provides guidance for the study of complex multi-body systems.2.It proposes a mapping algorithm for rapid extraction of high-precision pose trajectory directly used to solve the discrete point surfaces,and the simulation software,Matlab is is used for trajectory simulation verification.According to the code format of the direct-writing inkjet printing software system and the mathematical model of the machine tool,a post-processing file based on the five-axis motion platform including anti-interference trajectory planning and Pmac-G code recognition was developed,completing the development of five-axis direct-writing inkjet printing system processing integrated algorithm.3.The functional software based on the above integrated algorithm is developed,and it is used to examine the trajectory acquisition of complex discrete curved-surface models.Besides,a multi-process platform external frame system was built,and perform numerical analysis and finite element analysis on the strength and load-bearing limit of the cantilever arrangement structure.4.The main source of the error term of the five-axis motion platform is summarized,and a new method to reduce the error is proposed.Parameter law of line width consistency within hundred-micron-scale direct-writing of curved surface film is explored,and function of the direct-writing preparation of different surface models and different patterned trajectories is verified.Finally,the experimental verification of direct-writing function on complex free surface models such as variable curvature surfaces and engine turbine blades has been completed.