Method and apparatus for manufacturing aluminum alloy extruded part
AssigneeKobe Steel, Ltd.
InventorsHideki Ishitobi, Kazuhiro Kaida, Hiroaki Hosoi
Life of this patent
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Abstract
A method for manufacturing an aluminum alloy extruded part includes: hot-extruding a 7000 series aluminum alloy by an extruder to form an extruded material; cutting the extruded material extruded from the extruder and moving forward to a predetermined length; applying plastic working to the cut extruded material in a state in which Vickers hardness of the extruded material is 50 to 70 (Hv); and applying aging treatment to the extruded material after the plastic working.
Claims16
A method for manufacturing an aluminum alloy extruded part, the method comprising:
- hot-extruding a 7000 series aluminum alloy by an extruder to form an extruded material;
- cutting the extruded material as it moves forward from the extruder to a predetermined length;
- applying plastic working to the cut extruded material in a state in which Vickers hardness of the cut extruded material is 50 Hv or higher and 70 Hv or lower;
- and
- applying aging treatment to the extruded material after the plastic working,
- wherein a time T minute(s) from the extrusion of the extruded material from the extruder to completion of the plastic working is set within a range of a following formula in relation to a yield strength σ MPa of the extruded material:
- T≤−0.59σ+322.
An apparatus for manufacturing an aluminum alloy extruded part, the apparatus comprising:
- an extruder configured to form an extruded material by hot-extruding a 7000 series aluminum alloy;
- a cutter configured to cut the extruded material to a predetermined length and separate the extruded material from the extruder;
- a conveyer configured to convey the extruded material cut to the predetermined length;
- a plastic working machine configured to apply plastic working to the extruded material conveyed by the conveyer;
- and
- a controller configured to control the extruder, the cutter, the conveyer, and the plastic working machine so as to complete the plastic working on the extruded material within a predetermined time after the extrusion of the extruded material from the extruder,
- wherein the predetermined time T minute(s) is set within a range of a following formula in relation to a yield strength σ MPa of the extruded material
- T≤−0.59σ+322.
Dependencies are inferred from the claim text.