Control system for heavy metallic coating weight
AssigneeNV Bekaert SA
InventorsMartin Soka, Kristof Mouton, Pavol Hertel, Dries Rollez, Dominiek Verkinderen, Tim Bruggeman
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Abstract
It is provided a method and device to control the thickness of a metallic coating on a steel wire. A device (101) for controlling a metallic coating thickness on a steel wire comprises: —a digital proportional valve (113); —a digital flow meter (111); —a pressure sensor (115); —a thickness sensor (105); —a gas nozzle (119); —a computer (107); and is characterized in that the relation between the gas flow measured by said digital flow meter (111) and the coating thickness measured by said thickness sensor (105) for said gas nozzle (119) is linear or parabolic.
Claims9
A method to control the thickness of a metallic coating on a steel wire comprising the steps:
- producing and storing on a computer system 107 a first data set with a relation between a current reference for a proportional valve 113 and a coating thickness of the metallic coating on the steel wire as measured by a thickness sensor 105;
- producing and storing on the computer system 107 a second data set with a relation between the current reference for the proportional valve 113 and a flow rate as measured by a digital flow meter 111;
- entering a target coating thickness in the computer system 107;
- measuring the thickness of a metallic coating on a steel wire using a thickness sensor 105 and sending said measured thickness to the computer system 107;
- sending with the computer system 107 a feed forward current reference to the proportional valve 113, according to the relation provided by said second data set;
- and
- correcting with the computer system 107 said feed forward current reference until the flow measured by the digital flow meter 111 is equal to a flow needed to reach said target coating thickness according to the relation provided by said first data set.
Dependencies are inferred from the claim text.