射线测量涡轮叶片大曲率处壁厚尺寸的方法

Wall Thickness Measurement Method for Maximum Curvature of Aero-Engine Turbine Blade Based on X-Ray

采用射线方法测量了某航空发动机涡轮叶片大曲率处的壁厚,制作了专用的叶片定位工装,以保证射线束与叶片被测处的垂直度。对叶片表面曲率半径<3 mm处的壁厚进行了射线测量,经与超声测厚和计量检测结果的分析对比,验证了射线测量结果的准确性和可靠性,证明了涡轮叶片大曲率处壁厚尺寸测量采用射线方法是可行的。

In order to prove that X-ray inspection method is effective for wall thickness measurement of aeroengine turbine blade, we make special fixed blade tool to ensure the perpendicularity between X-ray beam and measurement point of turbine blade. Through the wall thickness measurement for the turbine blade surface where curvature radius smaller than 3 mm, and also through the analysis and comparison with ultrasonic measurement or metrology results, the veracity and feasibility of X-ray measurement results were proved, pointing out that wall thickness measurement method for maximum curvature of aero-engine turbine blade based on X-Ray was effective.