METHOD OF MANUFACTURING AN AUTOMOBILE SUSPENSION PART
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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Abstract
For manufacturing an aluminum alloy automobile suspension part, an ingot material is heat treated and forged, a through-hole is formed therein and it is subjected to thermal refining. A minimum length between a rib end on a side of the through-hole and a through-hole end is made 6 mm or larger.
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Citations
2 Claims
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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:
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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, wherein a minimum length between a rib end on a side of the through-hole and a through-hole end is 6 mm or larger. - View Dependent Claims (2)
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Specification