Abstract:
A joined body formed by joining end surfaces of two joining members to each other by a friction welding, the joined body includes a hollow portion formed on at least one of the two joining members, the hollow portion being configured to have an opening at the joining face between the two joining members; and an annular groove portion formed on an inner circumferential surface of the hollow portion at a position separated from a joining face in an axial direction.
Abstract:
An exemplary system and method for welding a piston assembly includes a piston assembly having a cooling gallery and a loose granulated medium positioned therein. The cooling gallery is formed by a piston body and a cooling gallery ring, and a welder such as a laser welder is positioned proximate the assembly to weld the piston body to the cooling gallery ring. During welding, the assembly is rotated and the loose granulated medium is caused to remain in a gravitationally low portion of the cooling gallery. The weld is formed in an area proximate the loose granulated medium such that weld spatter emitted during welding is emitted into the loose granulated medium.
Abstract:
The invention relates to a drive unit (10) of a fluid-actuated linear drive (1) which is composed of a piston rod (12), a drive piston (15) sitting on the piston rod (12) and a buffer sleeve (24) likewise sitting on the drive piston (15). Said components (12, 15, 24) are fixed to one another by one and the same common weld joint (33). The invention further relates to a method for producing a drive unit (10) of this kind and also to a fluid-actuated linear drive (1) equipped with a drive unit (10) of this kind.
Abstract:
Die Erfindung betrifft ein Verfahren zur Herstellung eines Gaswechselventils (1')für eine Hubkolbenbrennkraftmaschine, insbesondere Auslassventil für einen längsgespülten Zweitakt-Grossdieselmotor, bei welchem Verfahren ein Ventilkörper bereitgestellt wird, umfassend einen sich entlang einer axialen Ventilschaftachse (A') erstreckenden Ventilschaft (2'), sowie einen sich an den Ventilschaft anschliessenden Ventilteller (3'), der sich in axialer Richtung vom Ventilschaft weg, und in Bezug auf die Ventilschaftachse (A') radial erweiternd nach aussen erstreckt. Dabei ist zwischen einer im wesentlichen orthogonal zur Ventilschaftachse (A') ausgebildeten Fussfläche (31') des Ventiltellers und dem Ventilschaft, eine Ventilsitzfläche (32') am Ventilteller (3') ausgebildet, wobei auf einem vorgebbaren Bereich der Fussfläche des Ventiltellers eine Korrosionsschutzbeschichtung (5', 51', 52') vorgesehen wird. Erfindungsgemäss wird die Korrosionsschutzbeschichtung mittels eines Metall-Schutzgasschweissverfahrens aufgeschweisst. Des weiteren betrifft die Erfindung ein nach dem erfindungsgemässen Verfahren hergestelltes Gaswechselventil.
Abstract:
A surface hardening material being excellent in impact resistance and having abrasion resistance is provided. Provided are: a high-toughness cobalt-based alloy containing 25.0 to 40.0 mass% of Cr, 0.5 to 12.0 mass% of a sum of W and/or Mo, 0.8 to 5.5 mass% of Si, and 0.5 to 2.5 mass% of B, 8.0 mass% or less of each of Fe, Ni, Mn, and Cu, and 0.3 mass% or less of C, the sum amount of Fe, Ni, Mn, Cu, and C being 10.0 mass% or less, and the remainder comprising 48.0 to 68.0 mass% of Co and unavoidable impurities; and an engine valve coated with the same.
Abstract:
The invention relates to a method for fixing an annular element (6) on a piston (1) for an internal combustion engine. According to said method: the annular element (6) is screwed onto the piston base body (4) by means of a thread (5) that is on the radial outer surface of part (23) of the piston base (9); a continuous groove (24) that is open at the top is formed in the piston base (9) in the region of the thread (5); the groove (24) is filled with solder material (26); the piston (1) is heated until the solder material (26) liquefies and flows through the thread pitch of the thread (5); the piston (1) is subsequently cooled. This produces a secure screw connection between the piston base body (4) and the annular element (6). In addition, the cooling channel (14) is sealed against the high-pressure combustion gases that act on the piston base (9).
Abstract:
Verfahren zur Herstellung eines Schwenkaggregats mit einem rohrförmigen Gehäuse und einer darin schwenkbar gelagerten Welle als Grundbauteile, wobei eine axial verlaufenden Rippe auf einer Innenwandung des Gehäuses und/oder einer äußere Mantelfläche der Welle mittels einer stoffschlüssige Verbindung fixiert wird, wobei an dem Grundbauteil eine in Umfangsrichtung kontinuierlich verlaufende Oberfläche hergestellt wird und die Rippe an mindestens einem der Grundbauteile aufgesetzt und festgelötet wird.