Abstract:
The invention relates to a method for producing a body (1) for exhaust treatment, said body comprising a plurality of metallic layers (2). According to the inventive method, the layers (2) are brought into contact with each other in an assembly region (3), and a join is made by means of a roller seam welding method in such a way that the layers (2) form channels (4) through which a gas flow can pass. The invention also relates to corresponding bodies (1) for exhaust treatment, that can especially be used as filters or catalyst carrier bodies in the car industry.
Abstract:
A heating furnace tube, a method of using the same and a method of manufacturing the same which have been developed with a view to eliminating inconveniences occurring when a carbon-containing fluid is made to flow in the heating furnace tube. The heating furnace tube which comprises a rare earth oxide particle distributed iron alloy containing 17-26 wt.% of Cr and 2-6 wt.% of Al. The method of manufacturing this heating furnace tube which comprises the steps of forming or inserting an insert metal on or into at least one of a joint end portion of one heating furnace tube element and that of the other heating furnace tube element, bringing these two joint end portions into pressure contact with each other directly or via an intermediate member, and diffusion welding the two heating furnace tube elements to each other by heating the insert metal.
Abstract:
A method of manufacturing a ball valve having a valve housing (10) and a ball (20), comprising the steps of weld-connecting a pair of housing halves (12) and (14) in mirror symmetrical shape through a single weld line so as to surround the ball having a through hole and a pair of recessed parts provided therein beforehand with the through hole (22) directed so as to be aligned with the weld line, forming holes (42) and (50) having the centers on the operating center line of the ball valve for mounting a pair of pivot shaft portions by machining in the valve housing at the positions aligned with both opening ends of the through hole, rotating the ball by an angle of 90°to align the through hole of the ball with the openings (12A, 14A) of the valve housing and also align the recessed parts (26, 28) of the ball with the holes of the housing, and installing the pair of pivot shaft portions (60, 68) into two holes, inserting pivot shafts into two recessed parts, and weld-connecting the periphery of the pair of pivot shaft portions to the edge portions of the holes.
Abstract:
A method of manufacturing an engraved plate used in intaglio printing, said plate being engraved by a tool, for example a laser beam, characterised in that the engraving tool uses data from a depth-map, based on a three-dimensional raster image of the document to be printed.
Abstract:
Catalytic converter (2) includes a catalyst container (10) formed from a tubular blank (10') and having a catalyst carrier, and a flange member (11) joined to the hollow member. The tubular blank (10') is subjected to a spinning operation by forming roll or rolls (22A), to form the catalyst container (10) having a desired shape, and the opposed circumferential surfaces of the catalyst container (10) and flange member (11) are forced against each other by the forming roll or rolls (22A) or an array of presser pieces (22B) while the catalyst container and flange member are rotated relatively to each other, so that friction heat is generated for friction-welding the catalyst container and flange member at their joining portions (10b, 11b).
Abstract:
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Vorwärmung eines Rohrstrangs (4) im Bereich von Rundschweißnähten (5) für eine nachfolgende Aufbringung einer Kunststoffummantelung (6) (Nachisolierung), wobei die Nachisolierung zeitlich dicht auf den Vorgang des Rundnahtschweißens folgt. Dabei wird zur Erzielung einer möglichst gleich hohen Oberflächentemperatur im Bereich der Nachisolierung die Vorwärmung in der Weise durchgeführt, daß im Verlauf der axialen Länge des Bereichs der Nachisolierung auf die Rohroberfläche bezogen unterschiedliche Wärmeenergiemengen in den Rohrstrang (4) eingebracht werden, wobei der Wärmeenergieeintrag im Nahbereich der Rundschweißnaht (5) jeweils geringer gehalten wird als in den beiderseits daran anschließenden Endbereichen des Bereichs der Nachisolierung.
Abstract:
A method for joining a cast part (1) and a case-hardened steel part (2) by means of welding. The inventive method consists in removing a large part of the surfaces that are to be welded (3, 7) from the parts (1, 2) that are otherwise finished for preparation purposes in order to obtain a narrow groove (10, 11). Said parts (1, 2) are subsequently assembled and welded by means of a high energy jet, providing an austenitic weld (28). A component thus formed can also contain another round bottomed groove (6) which is parallel to the weld. The invention enables high quality, high fatigue strength, mass-produced joins to be made between various materials.
Abstract:
Es handelt sich um eine Anlage (1) zum Zusammenfügen und Längsschweißen von aus Blechen o.dgl. gebogenen Rohren (2). Die Anlage besteht aus einem Anlagenbett (4), an dessen Seiten bzw. Ecken Ständer (5) angeordnet sind, wobei auf der oberen Tischfläche (6) des Anlagenbettes (4) ein Rollengang (7) vorgesehen ist, auf dem die Rohre (2) in Längsrichtung bewegt werden. Am oberen Ende der Ständer (5) ist eine Traverse (9), an der ein vertikal verfahrbarer Arbeitskopf (10) mit einer in Längsrichtung zwischen Abrolleinrichtungen (11) angeordneten Schweißeinrichtung (12) vorgesehen ist. Seitlich sind vertikal verfahrbare und in Querrichtung zustellbare Führungseinrichtungen (24) mit Rollen (25) angeordnet. Um eine Anlage (1) zu schaffen, mit der ein Kantenversatz von längszuschweißenden Rohren (2) sehr einfach ausgeglichen und individuell angepaßt werden kann und der Spalt des Schlitzes entsprechend den Anforderungen beim Schweißen erhalten bleibt, bestehen die Abrolleinrichtungen (11) am Arbeitskopf (10) jeweils mindestens aus einem zwei nebeneinander mit Abstand (a) angeordnete Räder (13) aufweisenden Räderpaar (14), wobei die Räder (13) mit ihren konzentrischen Mittelachsen (15) gemeinsam um einen auf der Längsmittelachse (16) der Anlage (1) liegenden Drehpunkt (17) mittels einer Schwenkeinrichtung (18) drehbar sind.