AUTOMOBILE SUSPENSION PART AND MANUFACTURING OF THE SAME

• US 20110221151A1
• Filed: 03/08/2011
• Published: 09/15/2011
• Est. Priority Date: 03/15/2010
• Status: Active Grant

• Current Assignee: Klaus Schmidt
• Original Assignee: Klaus Schmidt
• Inventors: Inagaki, Yoshiya, SAKAMOTO, Shogo
• Granted Patent: US 8,961,714 B2
• Time in Patent Office: Days
• US Class Current: 280/124.1
• CPC Class Codes: B21J 1/06 Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations B21J5/063 takes precedence
• CPC Class Codes: B21J 5/02 Die forging; Trimming by making use of special dies ; Punching during forging
• CPC Class Codes: B21K 1/74 forked members or members with two or more limbs, e.g. U-bolts, anchors
• CPC Class Codes: B60G 2206/12 with two attachment points on the sprung part of the vehicle
• CPC Class Codes: B60G 2206/124 the arm having triangular or Y-shape, e.g. wishbone
• CPC Class Codes: B60G 2206/7102 Aluminium alloys
• CPC Class Codes: B60G 2206/8101 by casting
• CPC Class Codes: B60G 2206/81022 by forging
• CPC Class Codes: B60G 2206/84 Hardening
• CPC Class Codes: B60G 7/001 Suspension arms, e.g. constructional features B60G7/006 takes precedence
• CPC Class Codes: B60G 99/00 Subject matter not provided for in other groups of this subclass
• CPC Class Codes: C22F 1/04 of aluminium or alloys based thereon
• CPC Class Codes: Y10T 29/49622 Vehicular structural member making

Abstract

A lightweight automobile suspension part having high strength is an aluminum alloy automobile suspension part having a through-hole, which has a yield strength of a normal section as a region where a crystal grain is not coarsened being 270 MPa or larger, and a minimum length between a rib end as a predetermined region on a side of the through-hole in a rib and a through-hole end as a predetermined region on a side of the through-hole in a web is 6 mm or larger.

Claims

1. An aluminum alloy automobile suspension part having a through-hole, wherein

a yield strength of a normal section as a region where a crystal grain is not coarsened is 270 MPa or larger, and

a minimum length between a rib end as a predetermined region on a side of the through-hole in a rib and a through-hole end as a predetermined region on a side of the through-hole in a web is 6 mm or larger.

2. 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;

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

by forming a through-hole forming region as a region where the through-hole is formed in the forging step and removing the through-hole forming region in the through-hole forming step, the automobile suspension part is made so that a minimum length between a rib end as a predetermined region on a side of the through-hole in a rib and a through-hole end as a predetermined region on a side of the through-hole in a web is 6 mm or larger.