Method for manufacturing an aircraft door having a monolithic structure, including the following steps: producing a forged blank; die-cutting the forged blank between a substantially smooth lower die and an upper die defining cells, and producing a die-cut part with a cellular structure having an open face and a face closed by a wall; machining the internal walls of the cellular structure to define at least one recess delimited by a web connecting the closed face and the open face and by a base projecting substantially perpendicular to the web, on the open face of the die-cut part.

A method for manufacturing an aircraft door with an integral structure. The method includes the following steps: producing a forged blank (7); die-cutting the forging blank (7) between a substantially smooth lower die (8) and an upper die (9) defining a plurality of cells and producing a die-cut part having a honeycomb structure having an open face and a closed face closed by a wall; an inner wall of the honeycomb structure is machined to define at least one recess defined by a web connecting the closed face and the open face and a base protruding substantially perpendicular to the web on the open face of the die cut component.

The disclosure comprises a method for producing a sleeve-like passage for a bearing accommodation in a metallic wheel control arm of a vehicle. The method may include placing a wheel control arm end of the wheel control arm onto a pressing plate of a pressing tool; and forming a tapered wall in the wheel control arm end and a circumferential collar around the tapered wall in the wheel control arm end, wherein the forming comprises pressing the wheel control arm end against the pressing plate using a pressing punch, wherein a volume of metal of the wheel control arm end is displaced into a circumferential cavity due to the pressing of the wheel control arm end against the pressing plate,; and perforating the tapered wall to obtain the sleeve-like passage.

A control arm for the rear wheel suspension of a car where the control arm includes a cup-shaped spring mount with branches projecting from the spring seat. The branches may be designed as closed channels or U-shaped channels. In the upper part of the control arm there are flanges projecting from each side thereof. The flanges include a reinforced area around the spring seat. The cup-shaped spring seat is reinforces with wedges on the inside thereof. The spring seat and branches form a stiff frame structure. Also described is a method for manufacturing the control arm by forging.

A control arm for the rear wheel suspension of a car where the control arm includes a cup-shaped spring mount with branches projecting from the spring seat. The branches may be designed as closed channels or U-shaped channels. In the upper part of the control arm there are flanges projecting from each side thereof. The flanges include a reinforced area around the spring seat. The cup-shaped spring seat is reinforces with wedges on the inside thereof. The spring seat and branches form a stiff frame structure. Also described is a method for manufacturing the control arm by forging.

A bicycle seat rail manufacturing method includes the steps of: pre-annealing, providing an aluminum alloy workpiece having undergone pre-annealing; first-stage heat treatment, performing heat treatment of full annealing on the aluminum alloy workpiece by a bending shaping, calendaring the aluminum alloy workpiece by a calendering shaping for a cooling time period, and bombarding the aluminum alloy workpiece by a cold forging shaping to increase its cross-sectional area; second-stage heat treatment, enhancing hardness of the aluminum alloy workpiece by a quenching shaping, and enhancing internal structure stability of the aluminum alloy workpiece by a tempering shaping; and cryogenic treatment, performing high-speed bombardments on the surface of the aluminum alloy workpiece by a shot blasting shaping to enhance its durability and service life. Therefore, a bicycle seat rail integrally formed of aluminum alloy is manufactured by the aforesaid steps.

A bicycle seat rail manufacturing method includes the steps of: pre-annealing, providing an aluminum alloy workpiece having undergone pre-annealing; first-stage heat treatment, performing heat treatment of full annealing on the aluminum alloy workpiece by a bending shaping, calendaring the aluminum alloy workpiece by a calendering shaping for a cooling time period, and bombarding the aluminum alloy workpiece by a cold forging shaping to increase its cross-sectional area; second-stage heat treatment, enhancing hardness of the aluminum alloy workpiece by a quenching shaping, and enhancing internal structure stability of the aluminum alloy workpiece by a tempering shaping; and cryogenic treatment, performing high-speed bombardments on the surface of the aluminum alloy workpiece by a shot blasting shaping to enhance its durability and service life. Therefore, a bicycle seat rail integrally formed of aluminum alloy is manufactured by the aforesaid steps.

A control arm for the rear wheel suspension of a car where the control arm includes a cup-shaped spring mount with branches projecting from the spring seat. The branches may be designed as closed channels or U-shaped channels. In the upper part of the control arm there are flanges projecting from each side thereof. The flanges include a reinforced area around the spring seat. The cup-shaped spring seat is reinforces with wedges on the inside thereof. The spring seat and branches form a stiff frame structure. Also described is a method for manufacturing the control arm by forging.

A method of manufacturing a stabilizer having a through hole at each of both ends by performing forging processing on a base material includes: a recess forming step of forming a recess at a through hole formation position corresponding to the through hole of the stabilizer at an end of the base material; and a through hole forming step of forming a through hole by performing perforation at the through hole formation position including the recess.

A method of manufacturing a stabilizer having a through hole at each of both ends by performing forging processing on a base material includes: a recess forming step of forming a recess at a through hole formation position corresponding to the through hole of the stabilizer at an end of the base material; and a through hole forming step of forming a through hole by performing perforation at the through hole formation position including the recess.