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Metal Coils Thickness Inspection


Batches of coiled steel often need to be inspected for compliance with thickness specifications. Conventional measurements are limited to the cut edges at the head of the coil. Ultrasonic thickness measurements, on the other hand, are made from one side only - the exposed side - making it possible to monitor the thickness over the entire width of the coil. Since the thickness can vary as much as 0.002 to 0.004 in. (0.05 to 0.10 mm) from edges to center, steel processors find great advantages in using small ultrasonic gauges.

Equipment: Selection of instrumentation depends on the accuracy that is required. The best accuracy can be achieved with the Model 38DL PLUS or 45MG with Single Element software gages with a 20 MHz (M208) or 10 MHz (M202) delay line transducer. In general, the calibrated accuracy with these gages combined with an M116 contact transducer is ±0.001 in. (±0.01 mm). In the High Resolution mode with an M208 or M202 delay line transducer they are capable of a calibrated accuracy of ±0.0003 in. (±0.008 mm) or better if thickness measurements are taken with delay line transducers under optimum circumstances. Continuous on-line thickness gaging can also be applied to coiled steel, using immersion type transducers. Contact us for details.

Olympus IMS
应用所使用的产品

手持式45MG是一款配置有各种测量功能和软件选项的超声测厚仪。这款独特的仪器与所有Olympus双晶和单晶探头探头兼容,是一款集所有解决方案于一机的创新型仪器,可用于几乎所有测厚应用。
38DL PLUS是一款高级超声测厚仪。这款仪器可使用双晶探头对内部腐蚀的部件进行检测。其性能包含THRU-COAT®(穿透涂层)和回波到回波。还可以使用单晶探头对薄材料、极厚材料以及多层材料进行非常精确的厚度测量。
27MG是一款基本超声测厚仪,其设计目的是从一侧对内部受到腐蚀或侵蚀的金属管道和工件进行精确的测量。这款仪器重量极轻、坚固耐用,且其设计符合人体工程学的要求,操作人员使用单手即可方便地进行操作。
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