论文部分内容阅读
对圆棒形、圆管形工件进行水浸超声波探伤时,均要采用线聚焦探头,线聚焦探头透镜曲率面一般采用灌注压模法,但采用这种方法时,(1)要用专用压模设备,压棒直径随曲率半径不同须经常更换;(2)操作繁琐,不易掌握,成效率低;(3)曲率面光洁度不够理想,影响探伤灵敏度。为此,我们对这一方法作了改革,即在已做好的平直探头的基础上,在其周围用磷铜片绕好一层保护壳,先浇注一层环氧树脂薄膜(配方不变,不得有气泡),厚5毫米左右,待凝固硬化后,再在60～80℃
The rod-shaped, circular pipe-shaped workpiece immersion ultrasonic flaw detection, should be used to line focus probe, line focus probe lens surface generally use perfusion compression molding method, but the use of this method, (1) to use special pressure Mold equipment, pressure rod diameter with the radius of curvature to be replaced frequently; (2) cumbersome operation, difficult to grasp, into a low efficiency; (3) Curvature surface finish is not ideal, the impact of testing sensitivity. To this end, we have made a reform of this method, that is, on the basis of the flat probe already done, around it with phosphor bronze sheet wrapped around a protective shell, first cast a layer of epoxy resin film (formula Change, no bubbles), about 5 mm thick, until coagulation hardening, then at 60 ~ 80 ℃