摘要:
A method for forming a lightweight axle shaft (10) and an axle shaft (10) are provided. A first tubular blank (36) is inserted in a die (38) defining an extrusion throat (50) at one end (48). A tool (52) is inserted into the die (38) having a mandrel (56) with portions (60,62) of increasing diameter. The tool (52) is moved towards the outlet end (48) of the die (38) to partially extrude the blank (36) through the extrusion throat (50) and form a hollow axle shaft (10) having a variable inner diameter based on the varying diameter of the mandrel (56). The tool (52) is then removed and a second tubular blank (36A) is inserted and placed in engagement with the first blank (36). The tool (52), or a different tool (68), is inserted into the die (38) and again moved towards the outlet end (48) of the die (38) to complete extrusion of the first blank (36) and produce a shaft (10) having diameters at each end (18,20) that are less than the diameter of an intermediate portion (28,29) of the shaft (10).
摘要:
Bearing component (10) comprising steel and at least one flash butt weld joint. The steel comprises, by weight, max 20 ppm S and max 15 ppm O and in that said steel includes sulphide inclusions and less than 5% of the sulphide inclusions contain encapsulated or embedded oxide inclusions.
摘要:
A ring member (1) is made of a steel material a rod member (W), which has been rolled so as to have a sectional shape of the ring member (1), with end faces of its opposite ends being joined together. This joining is accomplished by means of a liquid phase bonding such as, for example, welding. The ring member (1) is rendered to be a raw material before a mechanical process is applied for the bearing ring of a rolling bearing assembly. In such case, the ring member (1) has to have an annular groove (3) that is processed to a raceway groove of the rolling bearing assembly. A strengthening treatment through a friction stir welding is applied to a joint (1a) after a rough turning process has been applied to the ring member (1) so as to have a sectional shape resembling to the sectional shape of the bearing ring.
摘要:
A method of manufacturing a rotor (1, 3, 5) includes steps of providing a rotor casing (10) and a bearing (12), wherein the rotor casing (10) has an axial hole (100); disposing the bearing (12) in the axial hole (100); and using a laser (14) to weld an inner edge (102) of the axial hole (100) and an outer edge (120) of the bearing (12), so as to fix the bearing (12) with the axial hole (100).
摘要:
The radial foil bearing (3) for supporting a rotary shaft (1) includes a cylindrical top foil (10) disposed to face the rotary shaft (1), a back foil (11) disposed on a radially outer side of the top foil (10), and a cylindrical bearing housing (12) accommodating the top foil (10) and the back foil (11). The back foil (11) is formed in a cylindrical shape using at least one back foil piece (11a). The back foil piece (11a) includes peak portions (11c) and valley portions (11b) which are alternately formed in a circumferential direction of the top foil (10) and is fixed to the bearing housing (12) at an intermediate portion between both end portions in a circumferential direction of the back foil piece.
摘要:
A bearing ring (160, 260, 310, 410) exhibiting an inner (155, 255) and an outer (140, 240) periphery, also exhibiting a raceway (121, 221) for rolling elements on one of said peripheries, the bearing ring exhibiting a gear structure (131-138, 231-238) on one of said peripheries, as well as exhibiting at least one welding joint (151, 251). The welding joint has been formed by flash butt welding. Preferably, the gear structure (131-138, 231-238) and/or the raceway (121, 221 ) have been formed by rolling, machining or a combination thereof.
摘要:
The invention concerns a method for manufacturing a steel component (6, 11) comprising a first steel part (7) and a second steel part (8), the first (7) and second (8) steel part having a carbon content up to 1.5 weight percent, The method is comprising: Heating (1), at least partly, the first steel part (7), and at least partly, the second steel part (8), to above the alpha/gamma transformation temperature, and joining (2) the first steel part (7) and the second steel part (8) by welding, the welding taking place at a temperature above the alpha/gamma transformation temperature, and cooling (3) such that hardening effects are avoided. The invention further concerns weld seams (9), welded steel components (6, 11), and bearing components (11, 15, 20, 22, 26, 27, 31).
摘要:
L'invention s'applique à un palier magnétique axial chemisé pour machine tournante équipée d'un rotor (6) en contact avec une atmosphère gazeuse corrosive, acide ou porteuse de particules, comprenant une armature rotorique (7) placée dans l'atmosphère gazeuse et un induit de stator (4) placé en regard de l'armature rotorique (7), l'induit de stator (4) comprenant au moins un bobinage (42, 43) et un corps ferromagnétique (41) placés dans une enceinte de protection (2,3) métallique. L'enceinte de protection (2, 3) comprend d'une part un support annulaire (2) à profil en U avec une paroi de fond (20), et des parois latérales interne et externe (21, 22) présentant une épaisseur de plusieurs millimètres et une longueur inférieure à celle de l'induit de stator (4) et d'autre part une chemise (3) annulaire en forme de coiffe à profil en U usinée dans la masse et donc sans soudure, avec des parois latérales interne et externe (31, 32) et une paroi de fermeture (30) présentant une épaisseur plus faible que celle des parois latérales interne et externe, les extrémités libres des parois latérales interne et externe (31, 32) de la chemise (3) étant soudées aux extrémités libres des parois latérales interne et externe (21, 22) du support annulaire (2).