摘要:
Die Erfindung betrifft ein Verfahren sowie eine Vorrichtung zur Herstellung von Rohren mittels eines Oberwerkzeugs und eines Unterwerkzeugs zum rohrformen einer zu einem U-Profil vorgeformten Blechplatine (2). Das Oberwerkzeug (6) weist im Bereich der sich gegenüberliegenden Längsflanken (7, 8) des Rohrprofils (R) gegensätzlich gepolte und gegeneinander elektrisch isolierte Elektrodenleisten (10, 11) auf, über welche unter Aufrechterhaltung einer Presskraft des Oberwerkzeugs (6) und des Unterwerkzeugs (5) ein elektrischer Strom in die sich gegenüberliegenden Längsflanken (7, 8) eingeleitet wird, wobei Kontaktbuckel (9) an den Längsflanken (7, 8) durch den anstehenden Pressdruck und die entstehende Schweißwärme mit der gegenüberliegende Längsflanke (7, 8) verschweißt werden.
摘要:
In a method of manufacturing a helically-wound lock-seam tube (8) for a ventilation duct system, the tube is provided with a plurality of air nozzles through its wall. The method involves the steps of: feeding a strip (1) of sheet metal from a supply (2) to a punching and pressing unit (3); punching and pressing the strip in the punching/pressing unit (3) to form two rows of spaced openings through the strip; feeding the punched strip to a roller unit (5), in which a longitudinal bead is formed in the strip; feeding the punched and beaded strip to a forming head (7) in which the strip is helically-wound to form a tube (8) having a helical lock seam; feeding the helically-wound lock-seam tube out of the forming head; and cutting the tube into desired lengths. The apparatus has components for carrying out the various method steps, and the finished tube (8) is provided with a desired pattern of air nozzles.
摘要:
La paroi tubulaire est réalisée par roulage d'une tôle dont deux bords opposés (4, 6) viennent en regard l'un de l'autre par leurs tranches et sont reliés de façon étanche par brasage. Selon l'invention, l'un (4) de ces bords présente des saillies (3) qui viennent se loger dans des évidements conjugués de l'autre bord (6) de façon à empêcher leur écartement mutuel lors du brasage. Application aux boîtes à fluide d'échangeurs de chaleur.
摘要:
A method of manufacturing an elongate, longitudinally apertured, metal tube comprising the steps of, starting with an elongate metal strip (17) of width corresponding to the peripheral dimension of the tube to be manufactured, forming apertures (16) in the strip (17) in positions directly related to the positions of the apertures required in the tube to be manufacturers, cold roll forming the apertured strip to a substantially closed, tubular, configuration, and, welding the abutting edges (18, 19) of the strip (17) to complete the tube formation.
摘要:
An automatic formation device or an automatic formation system sets an equipment operation time from a required manufacturing time per product during the manufacturing of tubes having a round, polygonal, or oblong cross-section, wherein values are calculated from a product diameter (D), and a pitch (P), a product length (L) and a preset time (T) of a metal band plate to be wound, operations of respective components are controlled on the basis of the calculated values while the respective values are being controlled, and the metal band plate is held by a chuck that is disposed on the tip side of a winding core member and rotates in a synchronized manner so as to prevent loosening of the wound metal band plate by tightening/untightening the metal band plate as needed. Also, a rotation speed correction function for a motor system is added.
摘要:
A process to manufacture a brazed heat exchanger comprises a tubular tank and at least one tube inserted in a corresponding slot operated in the tubular tank, the at least one tube being in fluid communication with the tubular tank, the process comprises the steps of: - providing a rectangular metal sheet having notches on one edge, the notches being in the same number as the number of tubes to be connected to the tank, - forming the metal sheet in a tubular shape until joining the longitudinal edges and closing the notches, forming slots, and creating an edges-joining-line that is discontinued as being interrupted by the slots, - providing the at least one tube with brazing clad on at least one end of the tube, - engaging the end of the tube that is provided with brazing clad into the slot formed in the tubular tank, - brazing the assembly.
摘要:
An automatic formation device or an automatic formation system sets an equipment operation time from a required manufacturing time per product during the manufacturing of tubes having a round, polygonal, or oblong cross-section, wherein values are calculated from a product diameter (D), and a pitch (P), a product length (L) and a preset time (T) of a metal band plate to be wound, operations of respective components are controlled on the basis of the calculated values while the respective values are being controlled, and the metal band plate is held by a chuck that is disposed on the tip side of a winding core member and rotates in a synchronized manner so as to prevent loosening of the wound metal band plate by tightening/untightening the metal band plate as needed. Also, a rotation speed correction function for a motor system is added.
摘要:
An expandable tube portion (4) including slots (5; 5a to 5e) arranged in a staggered fashion is expanded. When the expandable tube portion (4) is expanded, the individual slots (5b) open to a cut end portion (3) of the expandable tube portion (4) are transformed to open in V-shape while the whole body of the expandable tube portion (4) is transformed to a lattice configuration. Hence, the tube expansion only need to apply a working force required to bend intersections of the lattice configuration, resulting in the reduction of the working force for tube expansion. As a result, the working force for tube expansion does not open a butt connection portion of a subject matter, negating the need for previously weld bonding the butt connection portion of the subject matter.
摘要:
A process to manufacture a brazed heat exchanger comprises a tubular tank and at least one tube inserted in a corresponding slot operated in the tubular tank, the at least one tube being in fluid communication with the tubular tank, the process comprises the steps of: - providing a rectangular metal sheet having notches on one edge, the notches being in the same number as the number of tubes to be connected to the tank, - forming the metal sheet in a tubular shape until joining the longitudinal edges and closing the notches, forming slots, and creating an edges-joining-line that is discontinued as being interrupted by the slots, - providing the at least one tube with brazing clad on at least one end of the tube, - engaging the end of the tube that is provided with brazing clad into the slot formed in the tubular tank, - brazing the assembly.