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Machining method of high-strength aluminum alloy sleeve

A processing method and high-strength technology, applied in the field of aluminum alloy, can solve the problems of high production cost and low processing efficiency of high-strength aluminum alloy process, and achieve the effect of saving processing cost and improving efficiency.

Inactive Publication Date: 2019-12-03
上海纳特汽车标准件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a processing method for a high-strength aluminum alloy sleeve, which has the advantages of simplifying the production process, ensuring product performance, and reducing processing costs, and solves the problem of low processing efficiency in the preparation of high-strength aluminum alloys. and high production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A processing method of a high-strength aluminum alloy sleeve is:

[0020] S1: Select raw material 0.9wt.% Zn, 5.5wt.% Mg, 2.1wt.% Mn, 4wt.% Cu, 1.3wt.% Sc, 1.5wt.% Yb, 0.8wt.% Tb, 1.5wt.% Zr, the balance is Al. .

[0021] S2: Two-stage aging treatment is carried out on the alloy material, first aging treatment at 90℃ for 8h, then aging treatment at 140℃ for 25h, and air cooling treatment after two aging treatments.

[0022] S3: Warm heading is performed on the material after aging treatment. Warm heading is performed on a multi-station cold heading machine. The process includes cutting, shaping, upsetting, heading, chamfering, positive and negative compound extrusion, etc., warm heading Use resistance heating and keep the material temperature at 250°C, and the production speed is 80 pieces / min.

[0023] S4: Tap the product after warm upsetting on an automatic tapping machine. The thread is cut and processed in the product hole at a processing speed of 60 pieces / min.

[0024] S...

Embodiment 2

[0027] A processing method of a high-strength aluminum alloy sleeve is:

[0028] S1: Select raw material 6wt.% Zn, 1wt.% Mg, 3wt.% Mn, 0.8wt.% Cu, 2wt.% Sc, 1.5wt.% Yb, 0.85wt.% Tb, 0.6 Zr in wt.%, the balance is Al.

[0029] S2: Two-stage aging treatment is carried out on the alloy material, first aging treatment at 110°C for 7h, then aging treatment at 160°C for 22h, and air cooling treatment after two aging treatments.

[0030] S3: Warm heading is performed on the material after aging treatment. Warm heading is performed on a multi-station cold heading machine. The process includes cutting, shaping, upsetting, heading, chamfering, positive and negative compound extrusion, etc., warm heading Use resistance heating and keep the material temperature at 300°C, and the production speed is 70 pieces / min.

[0031] S4: Tap the product after warm upsetting on an automatic tapping machine. The thread is cut and processed in the product hole at a processing speed of 70 pieces / min.

[0032] S5...

Embodiment 3

[0035] A processing method of a high-strength aluminum alloy sleeve is:

[0036] S1: Select raw materials 5wt.% Zn, 1wt.% Mg, 1.8wt.% Mn, 3wt.% Cu, 0.9wt.% Sc, 1.5wt.% Yb, 0.7wt.% Tb, 0.5wt.% Zr, the balance is Al.

[0037] S2: Two-stage aging treatment is performed on the alloy material, first aging treatment at 105°C for 10h, then aging treatment at 180°C for 18h, and air cooling treatment after two aging treatments.

[0038] S3: Warm heading is performed on the material after aging treatment. Warm heading is performed on a multi-station cold heading machine. The process includes cutting, shaping, upsetting, heading, chamfering, positive and negative compound extrusion, etc., warm heading Use resistance heating and keep the material temperature at 350°C, and the production speed is 70 pieces / min.

[0039] S4: Tap the product after warm upsetting on an automatic tapping machine. The thread is cut and processed in the product hole at a processing speed of 70 pieces / min.

[0040] S5: P...

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Abstract

The invention relates to the technical field of aluminum alloy fasteners. The invention further discloses a machining method of a high-strength aluminum alloy sleeve. The high-strength aluminum alloysleeve comprises the following alloy elements in parts by weight: 0.2%-6% of Zn, 0.2%-6% of Mg, 0.2%-3% of Mn, 0.2%-4% of Cu, 0.1%-2% of Sc, 0.1%-2% of Yb, 0.1%-1% of Tb, and 0.2%-2% of Zr, with the balance being Al. According to the machining method, after the selected alloy components are subjected to aging treatment, the alloy sleeve can meet the requirements that the tensile strength is 450 MPa or above and the hardness is 160 HV or above. Warm upsetting forming is performed on the material; the hot temperature, the heating time and the production speed are controlled, it is guaranteed that a product does not crack in the forming process, meanwhile, the mechanical property is not obviously reduced, the production efficiency can reach 50 pieces per minute or above through the warm upsetting technology, the material utilization rate reaches 90% or above, the efficiency is improved by 100 times or above than that of a traditional machining mode, and the product machining cost is greatly reduced.

Description

Technical field [0001] The invention relates to the technical field of aluminum alloys, in particular to a processing method of a high-strength aluminum alloy sleeve. Background technique [0002] In the fastener forming process, cold heading technology is one of the main processes. This technology applies external force to the metal at room temperature to form the metal in a predetermined mold, which is suitable for mass production of steel fasteners. At present, high-strength aluminum alloys in the industry cannot achieve cold heading due to their high strength and low plasticity. Therefore, machining and forming methods are often used in the industry for production and processing. However, this process has low processing efficiency, generates a lot of waste, and consumes a lot of energy. high cost. To solve the upsetting forming of such high-strength aluminum alloys, it is necessary to reform the material to soften it and then cold-head, and then perform solution aging to inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/06C22C21/10C22C21/16C22C21/18C22F1/047C22F1/053C22F1/057B21J5/00
CPCB21J5/002C22C21/06C22C21/10C22C21/16C22C21/18C22F1/047C22F1/053C22F1/057
Inventor 李军正
Owner 上海纳特汽车标准件有限公司
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