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METHOD OF MANUFACTURING AN AUTOMOBILE SUSPENSION PART

  • US 20130239412A1
  • Filed: 05/09/2013
  • Published: 09/19/2013
  • Est. Priority Date: 03/15/2010
  • Status: Active Grant
First Claim
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1. A manufacturing method of an aluminum alloy automobile suspension part having a through-hole, the automobile suspension part having a yield strength of a normal section as a region where a crystal grain is not coarsened being 270 MPa or larger, the method comprising:

  • an ingot material preparing step of preparing an ingot material;

    a heat treatment step of performing heat treatment of the ingot material;

    a shaping step of shaping the heat-treated ingot material to form a shaped member having a rib;

    a forging step of forging the shaped member;

    a through-hole forming step of forming a through-hole on the forged shaped member; and

    a thermal refining step of performing thermal refining of the forged shaped member on which the through-hole is formed, whereina minimum length between a rib end on a side of the through-hole and a through-hole end is 6 mm or larger.

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