Yorozu Corporation

Tomo Tsuchida

Hiroshi Kimura

Junichi Seki

Masaharu Matsumoto

Koji Matsuda

Akira Narita

Masahiro Igarashi

Masahiro Hosoi

Stepwise bending in the method for manufacturing a vehicle suspension arm includes a first bending step and a second bending step. In the first bending step, preliminary bending is performed while holding a portion that composes a base portion of a body portion and a portion that composes first coupling portions in a workpiece W by a punch (first punch). In the second bending step, while holding of the portion that composes the first coupling portions by the first punch is released subsequently to the first bending step, bending is performed along a fold given by the first bending step while holding the portion that composes the base portion of the body portion by a punch (second punch).

Method for manufacturing vehicle suspension arm and vehicle suspension arm

Method of manufacturing a vehicular arm component having a particular torsional rigidity and a sufficient tensile strength. Method of manufacturing a vehicular arm componenthaving a hollow shape in open cross-section by subjecting workpiece W, which is a flat plate, extending in an XY plane to pressing in stages such that two side surfaces W, Wof the workpiece in an XZ plane formed by the X direction and a Z direction face one another across a gap G, the method including a restriking process in which a protrusiondisposed on a restriking dieto be extended in the X direction is arranged in the gap between the two side surfaces facing one another and the two side surfaces are brought into contact with the protrusion such that the workpiece is pressed from an outer periphery to an inner periphery.

Vehicular arm component manufacturing method and vehicular arm component

[Problem] To provide a suspension link having excellent reliability in strength or the like of a coupling portion of the suspension link while being inexpensive. [Solution] The present invention relates to a production method for a suspension link () having a tire coupling portion () that rotatably couples a tire to a suspension and a suspension coupling portion () that is coupled to a sub-frame member constituting the suspension, the method including: a bending process in which a plate is bent, a bent portion of the bent plate is formed into a hollow shape, and the hollow shape is used as one of the tire coupling portion and the suspension coupling portion; and an edge bending process in which an outer peripheral edge portion of the plate is bent prior to the bending process. The outer peripheral edge portion of the plate is bent by the edge bending process, the outer peripheral edge portion of the plate including an area from an arm () to a bent portion ().

Suspension link and production method therefor

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Yokohama, Japan

Tomo Tsuchida