Method for producing laminated metal tubes, and a laminated tube and the use thereof

Abstract

For the production of a laminated tube of metal with an outside diameter ranging from 2 to 10 mm, in a first step a metal strip coated on one side (preferably with gold) is placed in a drawing die of a drawing apparatus with fixed internal mandrel, clamped at one end in a movable drawing carriage, and by movement of the drawing carriage is rolled to a tubular insert with a virtually closed gap along the tube axis, the width of the strip corresponding at least approximately to the average circumference of the tubular insert. In a second step the semifinished product shaped as a tubular insert is inserted into an external seamless tube. In a third step the tubes inserted one into the other are clamped each by one end in the drawing carriage of the drawing apparatus and pulled by means of a drawing die with fixed internal mandrel to final dimension (with reduced diameter, the outer tube and the tubular insert being bonded together in a press fit by radial compression. A method for the production of a laminated tube of metal which is radially compressed by drawing is furthermore recited, according to which the strip with one coated face (preferably gold coating) is placed in a drawing die of a drawing apparatus with fixed internal mandrel and, by movement of the drawing carriage, is rolled to a laminated tube with virtually closed longitudinal gap, the width of the strip corresponding at least approximately to the average circumference of the tubular insert, and the metal strip being guided in the drawing apparatus such that the coated strip face forms the inside surface of the laminated tube to be made. The laminated tube serves preferably for the transmission of infrared radiation for pyrometric temperature measurement.

Dependencies are inferred from the claim text.