A Robot Trajectory Optimization Approach for Thermal Barrier Coatings Used for Free-Form Components

作者：Cai, Zhenhua; Qi, Beichun^*; Tao, Chongyuan; Luo, Jie; Chen, Yuepeng; Xie, Changjun

来源：Journal of Thermal Spray Technology, 2017, 26(7): 1651-1658.

DOI：10.1007/s11666-017-0601-2

• heat transfer analysis
• off-line programming
• thermal barrier coatings

This paper is concerned with a robot trajectory optimization approach for thermal barrier coatings. As the requirements of high reproducibility of complex workpieces increase, an optimal thermal spraying trajectory should not only guarantee an accurate control of spray parameters defined by users (e.g., scanning speed, spray distance, scanning step, etc.) to achieve coating thickness homogeneity but also help to homogenize the heat transfer distribution on the coating surface. Amesh-based trajectory generation approach is introduced in this work to generate path curves on a free-form component. Then, two types of meander trajectories are generated by performing a different connection method. Additionally, this paper presents a research approach for introducing the heat transfer analysis into the trajectory planning process. Combining heat transfer analysis with trajectory planning overcomes the defects of traditional trajectory planning methods (e.g., local over-heating), which helps form the uniform temperature field by optimizing the time sequence of path curves. The influence of two different robot trajectories on the process of heat transfer is estimated by coupled FEM models which demonstrates the effectiveness of the presented optimization approach.

• 出版日期2017-10
• 单位武汉理工大学