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The application of sensors for process monitoring in high pressure water jet technology

Die Anwendung von Sensoren zur Prozeßüberwachung in der Hochdruckwasserstrahltechnologie
: Knaupp, M.

Hashish, M. ; Water Jet Technology Association:
7th American Water Jet Conference 1993. Proceedings. Vol.1
St.Louis, MO: Water Jet Technology Assocation, 1993
ISBN: 1-880342-02-2
American Water Jet Conference <7, 1993, Seattle/Wash.>
Fraunhofer IPA ()
Hochdruckwasserstrahlschneiden; Prozeßüberwachung; sensor; Wasserstrahlschneiden

In production technology, high-pressure jetcutting is considered to be the best separation method for cutting various materials today. Paper, textiles, food, plastics and ceramics are frequently cut this way. For the separation of metals, ceramics and compound materials, such as metal plastics, abrasives have generally to be added. Permanently increasing demands in the branch of product engineering concerning exactitude, quality, security, flexibility and economic efficiency have led in jetcutting technology to the development of modern NC- or CNC-controlled high-pressure jetcutting systems. Besides, the water jet is applied as a device in flexible production systems. Increasing demands concerning the manufacturing of products or components necessitate an optimal conception of the manufacturing processes. In order to meet the requirements of given work tolerances, a detailed process of monitoring and controlling is necessary for the quality control of the finished product. Today, "onli ne" monitoring and controlling systems are increasingly applied in manufacturing, engineering and processing. Comparable process controlling systems have not been common in jetcutting technology up to now, since process-specific sensor systems have not been available. High demands, regarding the sensitivity, threshold, resolution and of course, solidity in rough shift to shift operation, have to be met by these sensors. The tolerances of modern production lines necitate the use of monitoring systems far in advance of quality control of the finished component, to recognize and correct fabrication spread as early as possible in the process to minimize the reject rate. Another goal is the improvement of the surface finish in order to reduce or skip secondary treatment. The FhG-IPA therefore is occupied with the development of a sensor system which permits control of cutting power (jet convergence, flowthrough), positioning (jet), attrition (cutting nozzle), collision "on-line". The advan