The present invention relates to an online roundness correcting device for a semifinished wheel, which consists of a jacking and rotating system, a left correcting system, a right correcting system and a central locating system. According to the online roundness correcting device provided by the present invention, in service, an online roundness correcting function for the semifinished wheel can be achieved, and the corrected wheel has good roundness and cylindricity, so that not only can the labor intensity for workers be lowered, but also the online roundness correcting device has the characteristics of high degree of automation, advanced process, simple structure and safe and stable performance.

The invention relates to a method for the forming of a workpiece, in particular a blank, composed of sheet steel, in which method the following steps are performed in succession: providing a workpiece composed of multiple steel layers which have been non-detachably connected to one another by roll-bonding and of which at least two steel layers have a different strength and/or elongation at fracture, heating the workpiece, and subjecting the workpiece to hot forming. To ensure a high strength and at the same time the easiest possible formability, the invention proposes that at least one section of the hot-formed workpiece is hardened, and that the workpiece is subsequently subjected to cold forming in the region in which the hardening has been performed. The invention also relates to a corresponding workpiece.

The invention relates to a method for the forming of a workpiece, in particular a blank, composed of sheet steel, in which method the following steps are performed in succession: providing a workpiece composed of multiple steel layers which have been non-detachably connected to one another by roll-bonding and of which at least two steel layers have a different strength and/or elongation at fracture, heating the workpiece, and subjecting the workpiece to hot forming. To ensure a high strength and at the same time the easiest possible formability, the invention proposes that at least one section of the hot-formed workpiece is hardened, and that the workpiece is subsequently subjected to cold forming in the region in which the hardening has been performed. The invention also relates to a corresponding workpiece.

Device for shaping a component, comprising a first tool and a second tool, which can be moved relative to one another along a movement axis to shape a component to be placed between the tools, wherein a surface of the first tool can be extended transverse to the movement axis in an extension region. With the described device and with the described method, components, in particular sheet steel components, can be shaped in such a way that contours that are oriented in parallel to a movement axis of the tools are particularly well formed. In particular circular shapes can thus be formed with particularly good accuracy. Negative influences of fluctuations of the thickness of the component can be offset. The device and the method are particularly suitable for the production of wheel rims for motor vehicles.

Device for shaping a component, comprising a first tool and a second tool, which can be moved relative to one another along a movement axis to shape a component to be placed between the tools, wherein a surface of the first tool can be extended transverse to the movement axis in an extension region. With the described device and with the described method, components, in particular sheet steel components, can be shaped in such a way that contours that are oriented in parallel to a movement axis of the tools are particularly well formed. In particular circular shapes can thus be formed with particularly good accuracy. Negative influences of fluctuations of the thickness of the component can be offset. The device and the method are particularly suitable for the production of wheel rims for motor vehicles.

The present invention provides an improved inner-supporting-type online roundness correcting device for a semifinished wheel, which comprises a machine frame, hydraulic cylinders, guide rails, servo motors and correcting wheels. When a bulge of the wheel is met, angles of left correcting wheels II are adjusted through a left servo motor, the left correcting wheels II are kept to be in contact with an inner rim of the wheel all the time and remain stationary in the position, and then, a left hydraulic cylinder enables a left correcting wheel Ito press the bulge of the wheel, so as to recover the roundness of the bulge; and when a depression of the wheel is met, right correcting wheels I are kept to be in contact with an outer rim of the wheel all the time and remain stationary in the position through a right hydraulic cylinder, the angle of a right correcting wheel II is adjusted through a right servo motor, and compressing hydraulic cylinders enable the right correcting wheel II to press the depression of the wheel, so as to recover the roundness of the depression.

A method of making at least a component for a rim base of a multi-piece wheel for a vehicle, comprising providing a workpiece of tubular configuration and hot upset forging the workpiece in press tooling to form a part thereof to a required configuration, wherein the part of the workpiece is heated to a forging temperature in situ in the press tooling, preferably by induction heating.

A method of making at least a component for a rim base of a multi-piece wheel for a vehicle, comprising providing a workpiece of tubular configuration and hot upset forging the workpiece in press tooling to form a part thereof to a required configuration, wherein the part of the workpiece is heated to a forging temperature in situ in the press tooling, preferably by induction heating.

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.