Ultrasonic
In ultrasonic measurement, signals of the ultrasonic frequency range are generated, transmitted, received (echoes) and then processed and evaluated. Based on the transit time measurement of the reflecting ultrasonic echoes at the outer and inner pipe wall as well as at the potentially existing boundary surfaces (in case of multilayer pipes), the individual layer thicknesses can be calculated. This requires the coupling medium of water, as well as precise, digitized ultrasonic evaluation electronics. The AUREX ultrasonic systems combine a high accuracy and simple operation for wall thickness and diameter measurement. This means that single-layer and coextruded pipes and tubes can be reliably measured down to a layer thickness of at least 0.05 mm. The interaction of measurement and control ensures overall stabilization of the production process and an efficient production. The early detection of thin and thick sections and the corresponding adjustment at the die leads to a further reduction of production costs. The AUREX systems are available for geometry measurement from 0.5 - 3,000 mm diameter and for 100% wall thickness measurement and flaw detection up to 630 mm diameter.
The AUREX MK is the complete solution for pipe dimensions from 0.5 - 400 mm. It enables compliance with the specified tolerances for wall thickness, eccentricity, diameter and ovality. Thanks to the combination of high-quality electronics with innovative measuring methods, up to 7 layers from 0.02 mm wall thickness can be evaluated.
In addition to the standard measurement for control and visualization of the product, the "Fast Specification Check MK/AFM" is optionally available, which allows a fast wall thickness check. Since the AUREX MK does not completely cover the pipe at the circumference, this wall thickness check can be used, for example, to detect typical thin section rings caused by jerking of the produced pipe at the entire circumference.
The AUREX ERS uses the measuring technique of the Electronic Rotating Scanner (ERS) principle. With this active-passive measurement, every point of the measured object is detected 100% in longitudinal and circumferential direction, so that even minimal tolerance deviations are detected. Coextruded layers can also be detected as soon as they are physically detectable by ultrasound. The AUREX ERS is complemented by the optional "Quality Check", a wall thickness error check. The "Quality Check" detects anomalies on the surface, in the material and on the inner surface of the pipe.
The AUREX AFM measuring chambers are flanged directly to the outlet of the vacuum tank. With up to 24 sensors a reliable and precise ultrasonic measurement with a centric pipe guidance is guaranteed. The measuring chambers are available for a diameter range of 63 - 630 mm. The AUREX AFM performs wall thickness and diameter measurement in parallel according to the number of sensors. The measurement data is documented for comprehensive quality verification. Since compliance with the tight tolerances for wall thickness, eccentricity, diameter and ovality is mandatory, detailed product information is available at any time.
Optionally, the AUREX AFM can be equipped with the "Fast Specification Check MK/AFM", which enables a fast wall thickness check. Since the AUREX AFM does not completely cover the tube at the circumference, this wall thickness check can, for example, detect typical thin section rings, which are caused by jerks of the produced tube at the entire circumference.
The AUREX XXL is the solution for large pipes with a diameter of up to 2700 mm. The system works with 8 water-coupled ultrasonic sensors that can be pneumatically adjusted. This is possible without conversion in case of a change of dimensions. Minimum wall thickness tolerances are obtained via the downstream control loops of the weight per meter and thin point control and production is perfected. The better centering enables considerable material savings, especially for large pipes.
ECCO is the efficient solution for fast pipe centering. Especially for thick-walled large pipes, with low line speeds and high mass throughput, the start-up process is difficult, time-consuming, and associated with high raw material costs. ECCO makes it possible to measure the wall thickness distribution shortly after the pipe calibration. The ultrasonic sensors, which are mounted directly behind the calibration sleeve in the vacuum tank, are pneumatically and flexibly moved up to the respective pipe geometry after line start-up and adapted to the pipe. The measurement starts and all information on wall thickness distribution for fast die head centering is available. And this already after production of only a few meters. The calibration and the distribution of the wall thickness on the circumference can be stored dimension-dependent and is available again at the next start of the same pipe dimension.
Our sales team is available to you as a competent partner for individual advice at any time.
References
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