A method for producing friction discs for a, in particular radial, dual clutch, includes the following steps: providing a first disc ring with a first inner diameter, providing a second disc ring with a second outer diameter, wherein the second outer diameter is smaller than the first inner diameter, and processing the first disc ring and the second disc ring in a tool for producing the friction discs. The second disc ring is arranged within the first disc ring, and the second and the first disc rings are processed in the tool together.

A manufacturing method is provided during which a plurality of first apertures are formed in a first plate to provide an apertured first plate. The apertured first plate is configured from or otherwise includes first plate metal. A first sheet is bonded to the apertured first plate to form a first grid structure. The first apertures extend through the apertured first plate to the first sheet. The first sheet is configured from or otherwise includes first sheet metal.

A method for manufacturing a hollow vehicle frame part includes: removing material from a first side of a first billet, creating a first inner shape of a target vehicle frame; removing material from a first side of a second billet to create a second inner shape of a target vehicle frame; bonding the billets together at the faying surfaces on first sides of the billets so the inner shapes face each other; and removing material by machining from the second sides of the first and second billets to create target outer shape of the vehicle frame part. The method further includes forming additional faying surfaces adjacent and at an angle to the faying surfaces on the first sides of the first and second billets, which faying surfaces together form a rabbet-type joint where the first billet and second billet are bonded. A corresponding us vehicle frame is also disclosed.

A method for manufacturing a hollow vehicle frame part includes: removing material from a first side of a first billet, creating a first inner shape of a target vehicle frame; removing material from a first side of a second billet to create a second inner shape of a target vehicle frame; bonding the billets together at the faying surfaces on first sides of the billets so the inner shapes face each other; and removing material by machining from the second sides of the first and second billets to create target outer shape of the vehicle frame part. The method further includes forming additional faying surfaces adjacent and at an angle to the faying surfaces on the first sides of the first and second billets, which faying surfaces together form a rabbet-type joint where the first billet and second billet are bonded. A corresponding us vehicle frame is also disclosed.

A steering knuckle, including a rod part, a disc part, an ear part including a first ear and a second ear. The rod part and the ear part are disposed on two sides of the disc part, respectively. The first ear is longer than the second ear. The first ear and the second ear each include a pin hole; the connection line of two pin holes of the first ear and the second ear is perpendicular to the axis of the rod part. The first ear extends parallel to the axis of the rod part in the direction away from the disc part to form a pulling arm configured to connect to a steering drag link. The second ear extends perpendicularly to the axis of the rod part and perpendicularly to the connection line of the two pin holes to form a steering arm configured to connect to a steering tie rod.

A steering knuckle, including a rod part, a disc part, an ear part including a first ear and a second ear. The rod part and the ear part are disposed on two sides of the disc part, respectively. The first ear is longer than the second ear. The first ear and the second ear each include a pin hole; the connection line of two pin holes of the first ear and the second ear is perpendicular to the axis of the rod part. The first ear extends parallel to the axis of the rod part in the direction away from the disc part to form a pulling arm configured to connect to a steering drag link. The second ear extends perpendicularly to the axis of the rod part and perpendicularly to the connection line of the two pin holes to form a steering arm configured to connect to a steering tie rod.

On at least one surface of a structural part, on all or part of a hollow section between outer and inner peripheral borders, is associated at least one cover sheet made of rigid metallic material. The at least one cover sheet is mechanically fixed with the edge of the peripheral borders of the structural part, and covers all or part of inner cavities formed on open sides of the part. The at least one cover sheet has a triple function: to increase the rigidity of the structural part, to absorb shock by deforming in a plane while remaining integral with the part, and to allow reduction of the mass of the structural part and optimization of the mass/performance ratio.

On at least one surface of a structural part, on all or part of a hollow section between outer and inner peripheral borders, is associated at least one cover sheet made of rigid metallic material. The at least one cover sheet is mechanically fixed with the edge of the peripheral borders of the structural part, and covers all or part of inner cavities formed on open sides of the part. The at least one cover sheet has a triple function: to increase the rigidity of the structural part, to absorb shock by deforming in a plane while remaining integral with the part, and to allow reduction of the mass of the structural part and optimization of the mass/performance ratio.

An improved forged wheel trimming die, including a connecting rod, a lower die base lower plate, a bottom plate, a stripper guide pillar, a knockout rod, an ejector block, a lower die base stiffened plate, a lower die base upper plate, a lower die, a stripper plate, follow-up retainer plates, a shearing blade and a trimming rod. The improved forged wheel trimming die has the advantages that by adding two follow-up retainer plates to the stripper plate of the die, burrs of a forged wheel blank are constrained along the radial direction during the cutting, thereby avoiding breakage due to excessive deformation; in this way, the burrs can be protected from damage and knocked out successfully by the knockout rod after being cut off from the blank.

An improved forged wheel trimming die, including a connecting rod, a lower die base lower plate, a bottom plate, a stripper guide pillar, a knockout rod, an ejector block, a lower die base stiffened plate, a lower die base upper plate, a lower die, a stripper plate, follow-up retainer plates, a shearing blade and a trimming rod. The improved forged wheel trimming die has the advantages that by adding two follow-up retainer plates to the stripper plate of the die, burrs of a forged wheel blank are constrained along the radial direction during the cutting, thereby avoiding breakage due to excessive deformation; in this way, the burrs can be protected from damage and knocked out successfully by the knockout rod after being cut off from the blank.