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纤维增强塑料复杂曲面的拟合及其带磨削线接触的轨迹优化模型

The Fitting of a Fiber-Reinforced-Plastic Complex Curved Surface and Its Orbit Optimization Model with Belt Grinding Line Contact.

作者信息

Xing Jiazheng, Xiao Guijian, He Yi, Huang Yun, Liu Shuai

机构信息

The State Key Laboratory of Mechanical Transmissions, Chongqing University, No.174, Shazhengjie, Shapingba, Chongqing 400044, China.

出版信息

Materials (Basel). 2019 Aug 22;12(17):2688. doi: 10.3390/ma12172688.

DOI:10.3390/ma12172688
PMID:31443511
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6747612/
Abstract

The surface quality and profile accuracy of a radar fiberglass radome are determined by the manufacturing of the fiber-reinforced-plastic (FRP) complex curved mold. The surface quality, thickness uniformity, and shape accuracy of the mold seriously affect the temperature and deformation control during the manufacturing process of the radome, thus affecting the antenna's serviceability, including its wave permeability and stability. Abrasive belt grinding is an effective method for processing FRP materials. However, issues regarding the profile fitting of the abrasive belt section line contact state and its influence on the precision of complex curved surfaces have not been solved, which seriously affects the processing quality. Here, an FRP complex curved surface mold surface based on the least-squares method was established. The local two-dimensional line contact and profile contour trajectory were obtained by the algorithm of optimal trajectory planning. Based on this, a grinding experiment was carried out. The experiments showed that the surface roughness based on this method was reduced from 0.503 to 0.289 μm, and the contour accuracy was improved by 16.9% compared with the conventional error. Through our analysis, the following conclusions can be drawn: the algorithm can effectively solve the problem of line contact surface fitting and significantly improve the precision of an FRP complex surface.

摘要

雷达玻璃纤维天线罩的表面质量和轮廓精度取决于纤维增强塑料（FRP）复合曲面模具的制造。模具的表面质量、厚度均匀性和形状精度严重影响天线罩制造过程中的温度和变形控制，进而影响天线的使用性能，包括其波透过率和稳定性。砂带磨削是加工FRP材料的有效方法。然而，砂带截面线接触状态的轮廓拟合及其对复杂曲面精度的影响问题尚未得到解决，这严重影响了加工质量。在此，建立了基于最小二乘法的FRP复杂曲面模具表面。通过最优轨迹规划算法获得局部二维线接触和轮廓轨迹。在此基础上进行了磨削实验。实验表明，基于该方法的表面粗糙度从0.503降低到0.289μm，轮廓精度比传统误差提高了16.9%。通过分析，可得出以下结论：该算法能有效解决线接触曲面拟合问题，显著提高FRP复杂曲面的精度。

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