With the method for manufacturing a composite brake disc, which includes a brake disc chamber and a friction ring having an inner profiling, a brake disc chamber blank is introduced into the friction ring. The brake disc chamber blank is then formed into the inner profiling via at least one embossing tool. A composite brake disc permitting a good torque transmission between the friction ring and the brake disc chamber can be manufactured in a cold-forming manner in this way. The forming-in can take place in a hammering manner, in particular by successively implementing a plurality of embossing steps in the region of different profile gaps of the inner profiling. Axial stops can also be simultaneously produced on forming-in. The axial stops serve to stop the brake disc chamber and the friction ring (3) are prevented from axially sliding apart.

In the air disperser (4) having a number of components including a top, a bottom and an outer circumferential wall forming a space (45) defined within an inner radius and an outer radius and having an air inlet (81), a set of guide vanes (7), and an air outlet (82) at the inner radius adapted to be positioned above a feed outlet from atomizing means, at least some of the components are formed by precision metal forming such as metal spinning.

In the air disperser (4) having a number of components including a top, a bottom and an outer circumferential wall forming a space (45) defined within an inner radius and an outer radius and having an air inlet (81), a set of guide vanes (7), and an air outlet (82) at the inner radius adapted to be positioned above a feed outlet from atomizing means, at least some of the components are formed by precision metal forming such as metal spinning.

The present invention relates to a hubless one-piece wheel comprising: a rim; and a disc integrally formed at the rim and formed by low-pressure casting, wherein the disc is a hubless type including a plurality of spokes and a space at the center of the rim. One side of said each spoke is integrally formed at the rim, and a lug hole is formed in the other side of said each spoke for coupling the wheel to a vehicle body. The plurality of spokes are radially arranged inside the rim, and each of the other sides of the spoke locates in the inner center portion of the rim being separated by the space.

A spinning forming device includes: a receiving jig supporting a central portion of a plate to be formed; and a rotating shaft to which the receiving jig is attached. Further, the spinning forming device includes: a heater that locally heats a transform target portion of the plate by induction heating; and a processing roller that presses the transform target portion to transform the plate. Furthermore, the spinning forming device includes a cooling device and/or a lubricant supply device. The cooling device sprays a cooling gas toward the processing roller. The lubricant supply device supplies a lubricant onto the processing roller or to between the processing roller and the plate.

A spinning forming device includes: a receiving jig supporting a central portion of a plate to be formed; and a rotating shaft to which the receiving jig is attached. Further, the spinning forming device includes: a heater that locally heats a transform target portion of the plate by induction heating; and a processing roller that presses the transform target portion to transform the plate. Furthermore, the spinning forming device includes a cooling device and/or a lubricant supply device. The cooling device sprays a cooling gas toward the processing roller. The lubricant supply device supplies a lubricant onto the processing roller or to between the processing roller and the plate.

The present disclosure relates to the field of idler, and in particular, to a welded idler and manufacturing method thereof. The method comprises steps of (1) separately manufacturing at least two parts; (2) friction welding, (3) spin forming, (4) turning an inner circle and an outer end surface, (5) turning another end surface, (6) surface treatment, (7) installing a bearing, (8) installing a bearing cover, (9) painting.

The present disclosure relates to the field of idler, and in particular, to a welded idler and manufacturing method thereof. The method comprises steps of (1) separately manufacturing at least two parts; (2) friction welding, (3) spin forming, (4) turning an inner circle and an outer end surface, (5) turning another end surface, (6) surface treatment, (7) installing a bearing, (8) installing a bearing cover, (9) painting.

A vehicle wheel includes an annular rim defining an axis and inboard and outboard sides. The rim includes an outboard bead seat, an inboard bead seat, an outboard well flank connected to the outboard bead seat and extending radially inwardly and towards the inboard side of the rim, and an inboard well flank connected to the inboard bead seat and extending radially inwardly and towards the outboard side of the rim. The rim further includes a well portion defined between the outboard and inboard well flanks, wherein the well portion is formed by a plurality of curved and straight portions linked together. The well portion has at least three transition portions having varying thickness cross-sectional profiles. A wheel disc is secured to the rim. The wheel disc includes a hub located centrally within the wheel disc and has a plurality of bolt holes formed therein.

A vehicle rim having outboard and inboard bead seats and an annular well flank connected to the outboard bead seat and extending radially inwardly and towards the inboard side of the rim. A transition portion is defined between the well flank and the inboard bead seat. The transition portion has a circumferential corrugated profile having a circumferentially concave-shaped outboard groove connected to the well flank at a first tangency point, and wherein the outboard groove defines the inner-most radial dimension of the rim. The transition portion further includes a circumferentially convex-shaped ridge directly connected to the outboard groove at a second tangency point, and a circumferentially concave-shaped inboard groove directly connected to the ridge at a third tangency point, and wherein the inboard groove is connected to the inboard bead seat at a fourth tangency point.