Published June 1983
| Version v1
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Continuous thickness control of extruded pipes with assistance of microcomputers
Creators
- 1. Technische Hochschule Aachen (Germany, F.R.). Inst. fuer Kunststoffverarbeitung in Industrie und Handwerk
Description
Because of economic and quality securing reasons a constant wall thickness of extruded pipes in circumference and extrusion direction is an important production aim. Therefore a microcomputer controlled system was developed, which controls die centering with electric motors. The control of wall thickness distribution; was realized with two conceptions: a dead time subjected control with a rotating on line wall thickness measuring instrument and an adaptive control with sensors in the pipe die. With a PI-algorithm excentricities of 30% of the wall thickness could be controlled below a trigger level of 2% within three dead times. (orig.)
Availability note (English)
MF available from INIS under the Report Number.Abstract (German)
Bei der Rohrextrusion ist die Konstanz der Wanddicke in Umfangs- und Extrusionsrichtung aus wirtschaftlichen und qualitaetssichernden Gruenden ein wichtiges Produktionsziel. Dazu wurde eine mikrorechnergesteuerte Zentrierregelung ueber ein mit Elektromotoren gesteuertes Werkzeug entwickelt. Die Regelung erfolgt mit einem rotierenden On-Line-Wanddickenmessgeraet sowie eine adaptive Regelung ueber Sensoren im Rohrkopf. Mit einem PI-Algorithmus konnten Exzentrizitaeten von 30% der Wanddicke innerhalb von drei Totzeiten unter eine Ansprechschwelle von 2% geregelt werden. (orig.)
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Additional details
Additional titles
- Original title (German)
- Kontinuierliche Dickenregelung von extrudierten Rohren mit Hilfe von Mikrorechnern
Publishing Information
- Imprint Pagination
- 64 p.
- Report number
- KFK-PFT--11
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 14807004
- Subject category
- S42: ENGINEERING; S46: INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY;
- Descriptors DEI
- ALGORITHMS; DEAD TIME; ECONOMY; EXTRUSION; MATERIALS TESTING; MICROPROCESSORS; ON-LINE CONTROL SYSTEMS; PERFORMANCE TESTING; PIPES; QUALITY ASSURANCE; QUALITY CONTROL; THICKNESS GAGES; TRIGGER CIRCUITS; TUBES
- Descriptors DEC
- CONTROL; CONTROL SYSTEMS; ELECTRONIC CIRCUITS; FABRICATION; MATERIALS WORKING; MEASURING INSTRUMENTS; MICROELECTRONIC CIRCUITS; ON-LINE SYSTEMS; PULSE CIRCUITS; TESTING; TIMING PROPERTIES
Optional Information
- Contract/Grant/Project number
- Contract 0264519-DVF 0901
- Notes
- With 26 figs., 26 refs.