CAJ | 학술논문

镁合金弹壳是具有变厚度变曲率特征的组合回转体，根据其结构特点提出了一种镁合金弹壳超声自动检测方案，设计了相应的超声自动检测系统。对六自由度超声自动检测台进行了运动学建模，实现了超声扫描运动路径与探头位姿的精确控制。以壳体内缺陷散射模型和多元高斯声束模型为基础，建立了壳体缺陷超声测量模型，并绘制了壳体缺陷定量表征曲线。利用六自由度超声自动检测台对镁合金弹壳试块进行超声扫描实验，实现了对壳体人工缺陷的检出与定量，从而验证了本文方法的有效性。
미합금탄각시구유변후도변곡솔특정적조합회전체，근거기결구특점제출료일충미합금탄각초성자동검측방안，설계료상응적초성자동검측계통。대륙자유도초성자동검측태진행료운동학건모，실현료초성소묘운동로경여탐두위자적정학공제。이각체내결함산사모형화다원고사성속모형위기출，건립료각체결함초성측량모형，병회제료각체결함정량표정곡선。이용륙자유도초성자동검측태대미합금탄각시괴진행초성소묘실험，실현료대각체인공결함적검출여정량，종이험증료본문방법적유효성。
Magnesium Alloy Cartridge Case is a combined revolution body with the feature of variable thickness and curvature.According to its structural characteristics,a scheme of automatic ultrasonic tes-ting was presented,and a corresponding automatic ultrasonic testing system was designed.The kinematics model of 6-DOF testing platform was built to realize the accurate control of the ultrasonic scanning motion path and probe position.An ultrasonic measurement model for case defect was proposed and the defect size characterizing curves were drawn on the basis of defect scattering models and multi-Gaussian ultrasonic beam models inside the case.An ultrasonic scan experiment was conducted by using 6-DOF testing plat-form,and the validation of the work was verified by the realization of the detection and sizing of artificial defects.