Preparing method of superhigh-strength aluminum alloy cylinder

An ultra-high-strength, aluminum alloy technology, which is applied in the field of preparation of ultra-high-strength aluminum alloy cylinders, can solve problems such as rough texture, uncontrollable size, and low production pass rate, and achieve high cylinder dimensional accuracy and production stability Good, good size controllable effect

Active Publication Date: 2019-08-23
NO 59 RES INST OF CHINA ORDNANCE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The strength of ultra-high-strength aluminum alloys can reach the level of some grades of copper and steel, but the plasticity is poor and the elongation is low. Large plastic deformation is prone to rough lines, pits and even cracks, especially in thin-walled parts. Extremely difficult to deform
And in the preparation process, the problems of uncontrollable size, poor production stability and low preparation pass rate are prone to occur.

Method used

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  • Preparing method of superhigh-strength aluminum alloy cylinder
  • Preparing method of superhigh-strength aluminum alloy cylinder
  • Preparing method of superhigh-strength aluminum alloy cylinder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A method for preparing an ultra-high-strength aluminum alloy closed cylinder, comprising the following steps:

[0051] 1. According to the shape and size requirements of the designed large length-to-diameter ratio variable wall thickness and thin-walled ultra-high-strength aluminum alloy closing cylinder, design extrusion, thinning and stretching and closing dies. The extrusion die is mainly composed of a fixed plate, a punch insert, a punch, a die, a guide pad and a ejector rod; a thinning stretch die is mainly composed of a punch, a stretch guide cylinder, a stretch die, and an upper pad. Plate, scraper, and lower backing plate; closing die is mainly composed of punch, closing die, closing ejector rod, and guiding backing plate. The positive tolerance of the punch in the mold is 0.1mm, and the negative tolerance is 0; the positive tolerance of the die is 0, and the negative tolerance is 0.1mm.

[0052] 2. The punch, die and ejector rod in the extrusion, thinning and ...

Embodiment 2

[0062] A method for preparing a large and ultra-high-strength aluminum alloy closed cylinder, comprising the following steps:

[0063] 1. According to the shape and size requirements of the designed large length-to-diameter ratio variable wall thickness and thin-walled ultra-high-strength aluminum alloy closing cylinder, design extrusion, thinning and stretching and closing dies. The extrusion die is mainly composed of a fixed plate, a punch insert, a punch, a die, a guide pad and a ejector rod; a thinning stretch die is mainly composed of a punch, a stretch guide cylinder, a stretch die, and an upper pad. Plate, scraper, and lower backing plate; closing die is mainly composed of punch, closing die, closing ejector rod, and guiding backing plate. The positive tolerance of the punch in the mold is 0.1mm, and the negative tolerance is 0; the positive tolerance of the die is 0, and the negative tolerance is 0.1mm.

[0064] 2. The punch, die and ejector rod in the extrusion, thin...

Embodiment 3

[0074] A method for preparing a large and ultra-high-strength aluminum alloy closed cylinder, comprising the following steps:

[0075] 1. According to the shape and size requirements of the designed large length-to-diameter ratio variable wall thickness and thin-walled ultra-high-strength aluminum alloy closing cylinder, design extrusion, thinning and stretching and closing dies. The extrusion die is mainly composed of a fixed plate, a punch insert, a punch, a die, a guide pad and a ejector rod; a thinning stretch die is mainly composed of a punch, a stretch guide cylinder, a stretch die, and an upper pad. Plate, scraper, and lower backing plate; closing die is mainly composed of punch, closing die, closing ejector rod, and guiding backing plate. The positive tolerance of the punch in the mold is 0.1mm, and the negative tolerance is 0; the positive tolerance of the die is 0, and the negative tolerance is 0.1mm.

[0076]2. The punch, die and ejector rod in the extruding, thinn...

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Abstract

The invention provides a preparing method of a superhigh-strength aluminum alloy cylinder, and belongs to the technical field of precise plastic forming. The method comprises the steps of mold preparing, blank turning, annealing, and appearance machining and is characterized in that after annealing and before appearance machining, jar extrusion, multi-pass thinning drawing, and closing in are carried out in sequence, and after appearance machining, heat treatment is carried out. A large-draw-ratio variable wall thickness thin-wall closing-in cylinder is adopted, the problems that superhigh-strength aluminum alloy is poor in moulding, tensile deformation appears, cracking is prone to appearing, in the cylinder manufacturing process, concave pits easily appear in the closing-in position andthe conical neck part, the surface is rough and has grains, and is even cracked, the thickness and the size is not controllable, and the production stability is poor are solved, and the product yieldand the yield of the method are both above 98%.

Description

technical field [0001] The invention relates to the technical field of precision forming, in particular to a method for preparing an ultra-high-strength aluminum alloy cylinder. Background technique [0002] Aluminum alloy has been widely used in transportation, petrochemical, construction, daily necessities and other industries due to its advantages of low density, high strength and better corrosion resistance than steel. Using aluminum alloy instead of steel or copper can achieve a weight reduction of more than 65% without changing the structure. Therefore, aluminum alloy is one of the ideal materials to realize lightweight components. [0003] The closed cylinder is a widely used storage container. In order to achieve lightweight, ultra-high-strength aluminum alloys have been used to replace copper and steel, especially in areas that require high lightweight, such as aviation, weapons, and personal portable products. Due to the particularity of the closing structure, e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00C22F1/04
CPCB23P15/00C22F1/002C22F1/04
Inventor 陈汉宾吴护林李忠盛李立张昭林付扬帆杨九州陈亮
Owner NO 59 RES INST OF CHINA ORDNANCE IND
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