Arm material and a method for its manufacture
AssigneeSumitomo Metal Industries, Ltd.
InventorsNaoaki SHIMADA, Michitaka Yoshida
Life of this patent
Estimating the term…
Abstract
An arm material for an upper arm or a lower arm is provided which constitutes a double wishbone suspension or the like of an automobile and which has a flat, hollow, closed cross-sectional shape and enables further decreases in size, decreases in weight, and increases in strength. An arm material for an automobile suspension has a body made from a parts material made by metal. The parts material made by metal has a flat, hollow, closed cross-sectional shape having a pair of opposing long sides and is formed from a single member in its lengthwise direction. The body has at least a first bent portion which is bent in a plane roughly parallel to the pair of long sides.
Claims3
(canceled)
(canceled)
A method of manufacturing an arm material characterized by
- supporting a parts material made by metal having a flat, hollow, closed cross-sectional shape at a first position while relatively feeding it in the lengthwise direction,
- locally heating the parts material made by metal being fed at a second position downstream of the first position in the feed direction of the parts material made by metal,
- at a third position downstream of the second position in the feed direction of the parts material made by metal, cooling the portion of the parts material made by metal which was heated at the second position, and
- imparting a bending moment to the heated portion of the parts material made by metal by two-dimensionally or three-dimensionally changing the position, at least in a plane roughly parallel to the pair of long sides, of a support means which supports the parts material made by metal in a region downstream of the third position in the feed direction of the parts material made by metal.
Dependencies are inferred from the claim text.