我厂有近十吨外径为φ8毫米,壁厚分别为1.5、1.2、1.0、0.75毫米及外径为φ5毫米,墨厚分别为1.0、0.75毫米的六种管材混料。由于数量多、内径小、两端口不平整,无法用卡尺分选。在此情况下,我们采用超声横波,利用其在薄壁管内多次反射引起的能量衰减和管端反射的声程差而引起反射波形不同的特点,对这批混料管进行分选。分选时采用40°斜探头,探头底部磨成园弧形,曲 I plant nearly 10 tons diameter φ8 mm, wall thickness was 1.5,1.2,1.0,0.75 mm and diameter φ5 mm, respectively, ink thickness of 1.0,0.75 mm of the six pipe material mixture. Due to the quantity, the inner diameter is small, the two ports are not smooth and can not be sorted by calipers. In this case, we use the ultrasonic shear wave, using the characteristics of the reflected waveforms caused by the energy difference caused by the multiple reflections in the thin-walled tube and the path difference of the tube end reflections, and sort the mixed tubes. Sorting using 40 ° oblique probe, the probe ground into the park arc, song