Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
B21C37/15—Making tubes of special shape; Making tube fittings
B21C37/22—Making finned or ribbed tubes by fixing strip or like material to tubes
B21C37/24—Making finned or ribbed tubes by fixing strip or like material to tubes annularly-ribbed tubes
Landscapes
Engineering & Computer Science
(AREA)
Mechanical Engineering
(AREA)
Heat-Exchange Devices With Radiators And Conduit Assemblies
(AREA)
Waermetauscher, bestehend aus wenigstens einer an dessen seitenflaechen angebrachten backe, insbesondere ein kuehler, sowie das verfahren zur herstellung eines solchen austauschers
Solarenergiekollektor, Verfahren zur Herstellung eines Solarenergiekollektors und Werkzeugmaschine zum Herstellen einer Verbindung eines Solarenergiekollektors sowie Verbindung mit Bördelverbindung