METHOD OF MANUFACTURING A MEASURING TUBE OF A FLUID MEASURING MEANS

Abstract: in a method of manufacturing a measuring tube of a fluid measuring device, a tubular semi-finished product having a through-opening extending in a longitudinal direction (l) of the tubular semi-finished product is provided, a circumferential wall of the tubular semi-finished product having at least one waveguide area which, after completion of the measuring tube, forms a waveguide for surface acoustic waves of an acoustic measuring device, and the waveguide area extending along a longitudinal direction (l) of the tubular semi-finished product and from an outer surface to an inner surface of the tubular semi-finished product. the tubular semi-finished product is inserted into a forming tool, and at least one mandrel is inserted into the through-opening, an outer geometry of the mandrel corresponding to an inner geometry of a fluid channel of the measuring tube to be formed from the through-opening. in a forming step in which a pressing force (f) is applied to at least one axial center section of the semi-finished product, at least the center section is plastically deformed, the through-opening being formed into the fluid channel. finally, the mandrel is removed.

Inventor(s): Yannick FUCHS, Manon DRUI, Cyrille BAUDOUIN, Damien NOIZILLIER

CPC Classification: B29C57/06 (SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms ; making laminated products by combining previously unconnected layers which become one product whose layers will remain together - ))

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