摘要:
Ziel der Erfindung ist die Erhöhung der Lebensdauer bzw. Laufleistung von Eisenbahnradsätzen. Der genannte technische Effekt wird dadurch erreicht, dass eine Vorrichtung und ein Verfahren zur lokalen Festigung der Räder eines Radsatzes für Schienenfahrzeuge, insbesondere Eisenbahnen, bereitgestellt werden. Die Vorrichtung umfasst einen Radsatzträger zur Aufnahme des Radsatzes, wobei der Radsatzträger eine Drehvorrichtung aufweist, um den aufgenommen Radsatz mit vorgegebener Geschwindigkeit um die Achse des Radsatzes zu rotieren. Ferner umfasst die Vorrichtung wenigstens eine verfahrbare Festigungsstation mit einem Paar von Festigungsköpfen mit jeweils einer drehbar gelagerten, im Betrieb stromführenden Festigungsrolle. Die Festigungsstation ist derart ausgestaltet, im Betrieb die stromführenden Kontaktflächen der Festigungsrollen des Paars von Festigungsköpfen an die Arbeitsfläche des Rades eines aufgenommenen Radsatzes anzudrücken. Vorzugsweise beträgt im Betrieb der Abstand zwischen den Kontaktflächen der stromführenden Festigungstollen eines Paares von Festigungsköpfen mit der Arbeitsfläche eines zu bearbeiten Rades entlang der Oberfläche des Umfangs des Rads zwischen 100 und 1000 mm, weiter bevorzugt zwischen 150 und 200 mm.
摘要:
A method of manufacturing a poly-V-grooved pulley capable of manufacturing a poly-V-grooved pulley to be put on and joined to a shaft via a one-way clutch and a bearing with a minimum steps and at a low cost, comprising the steps of forming a cylindrical body (1) by forging, forming outwardly-extending first and second lobes (2, 3) at the axial both ends on the outer circumferential surface of the body (1) and then forming by form rolling poly-V-grooves (4) between the first and second lobes (2, 3) on the outer cicumferential surface of the body (1).
摘要:
A sprocket permitting the use of existing chains and having a reduced weight. Specifically, a sprocket (2) comprising a sprocket body (4) and teeth (6) provided around the periphery of the sprocket body (4), wherein the teeth (6) are made thicker than the sprocket body (4).
摘要:
The invention relates to plastic metal working, in particular to the working of multi-phase alloys based on nickel, titanium and iron used for manufacturing parts like discs, rings, drums with bottom and flange, conical, hemispherical, axially symmetric and asymmetric parts, for example a propeller blade with an extended surface. The inventive method comprises a local formation of the initial semimanufactured article having an inner structure conditioned for deformation. The local formation is performed in controlled thermomechanical conditions. The deformation is carried out at optimal temperatures and rates and the forces applied are optimal for the selected metal which is conditioned for superplastic deformation. The formation is carried out on a rotatable or otherwise moving mandrel or in a matrix. One surface of the initial semimanufactured article is formed by the mandrel or by the surface of the matrix used for impression, whereas the other surface is formed by a locally deforming tool. The process control is performed during the formation process by changing parameters related to mandrel displacement, processing speed, applied force and the manner of displacement of the locally deforming tool and also by parameters and controlled structural modifications of the deformed material.
摘要:
A method of manufacturing a poly-V-grooved pulley capable of manufacturing a poly-V-grooved pulley to be put on and joined to a shaft via a one-way clutch and a bearing with minimum steps and at a low cost, comprising the steps of cutting a thick-walled pipe material into a standard size to form a body (1), forming outwardly-extending first and second temporary lobes (13, 14) at the axial both ends on the outer circumferential surface of the body (1) by a press work in which the axial both ends of the body (1) are held between upper and lower dies (5, 6) having respective annular wedge-shaped projections (7, 9) and then the projection (7, 9) are forced into the axial both ends of the body (1), and finally shaping the first and second temporary lobes (13, 14) into first and second lobes (2, 3) of preset shapes and forming poly-V-grooves (4) by form rolling.