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Spinning machining method for aluminium alloy thin-walled revolution body

A processing method and technology of aluminum alloy, which can be applied to other household appliances, household appliances, applications, etc., can solve the problems of poor roundness of the rotating body, poor apparent quality and strength of the product, and achieve high production efficiency and low production costs. Effect

Active Publication Date: 2016-05-04
湖北三江航天江北机械工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the roundness of the rotor produced by this process is poor, and the apparent quality and strength of the product are poor.

Method used

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  • Spinning machining method for aluminium alloy thin-walled revolution body
  • Spinning machining method for aluminium alloy thin-walled revolution body
  • Spinning machining method for aluminium alloy thin-walled revolution body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: Diameter Φ of the large end of a certain warhead charge shell 1 458.3mm, small end diameter Φ 2 293.5mm, profile bus length L566mm, inner profile R1951.7mm, wall thickness δ 1 Processing of 4.0mm aluminum alloy thin-walled rotating bodies. Its processing process is as follows:

[0029] 1) According to the diameter of the big end of the product Φ 1 458.3mm, small end diameter Φ 2 293.5mm, wall thickness δ 1 4.0mm and profile bus length L566mm, combined with the formula of aluminum alloy spinning blank 1: the thickness of aluminum alloy spinning blank is δ 2 =(δ 1 +Δ) / sinθ, θ is set to 20°, Δ is set to 0.5, that is, δ 2 =(4.0+0.5) / sin20°=13mm; the diameter of the outer circle of the aluminum alloy spinning blank is Φ 3 ≥2L*δ 1 / δ 2 +Φ 2 ≈641mm; the diameter of the inner hole of the aluminum alloy spinning blank is Φ 4 2 293.5mm, take Φ 4 100mm; that is, the size of the aluminum alloy spinning blank is Φ 3 641×Φ 4 100×δ 2 13. For the drawing of a...

Embodiment 2

[0036] Example 2: Diameter Φ of the large end of the charge shell of a certain warhead 1 542.9mm, small end diameter Φ 2 406.2mm, profile bus length L604mm, wall thickness δ 1 Processing of 4.0mm aluminum alloy thin-walled rotating bodies. Its processing process is as follows:

[0037] 1) According to the diameter of the big end of the product Φ 1 542.9mm, small end diameter Φ 2 406.2mm, wall thickness δ 1 4.0mm and profile bus length L604mm, combined with the formula of aluminum alloy spinning blank: the thickness of aluminum alloy spinning blank is δ 2 =(δ 1 +Δ) / sinθ, θ is set to 15°, Δ is set to 0.5, that is, δ 2 =(4.0+0.5) / sin20°=18mm; the diameter of the outer circle of the aluminum alloy spinning blank is Φ 3 ≥2L*δ 1 / δ 2 +Φ 2 ≈675mm; the diameter of the inner hole of the aluminum alloy spinning blank is Φ 4 2 406.2mm, take Φ 4 100mm; that is, the size of the aluminum alloy spinning blank is Φ 3 675×Φ 4 100×δ 2 18. For the drawing of aluminum alloy spinni...

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Abstract

The invention discloses a spinning machining method for an aluminium alloy thin-walled revolution body. The spinning machining method comprises the following steps: producing an aluminium alloy spun blank with required dimensions, and carrying out annealing treatment on the aluminium alloy spun blank; carrying out shearing spinning on the aluminium alloy spun blank to obtain a primary conical barrel; carrying out annealing treatment on the primary conical barrel, and cutting a process allowance at a large end to form a secondary conical barrel; carrying out common spinning on the secondary conical barrel on a spinning machine to obtain a pre-spun aluminium alloy thin-walled revolution body; and carrying out annealing treatment and surface polishing treatment on the pre-spun blank, and then cutting process allowances at the two ends of a spun part by using a plasma cutting machine, so as to obtain the aluminium alloy thin-walled revolution body meeting process requirements. According to the invention, the aluminium alloy thin-walled revolution body is machined by virtue of the technologies of shearing spinning and common spinning; the dimension and structural performance requirements of a bullet shell are met; a machining method and a stamping-welding method can be replaced; and a low-cost and efficient machining method is provided for machining for an aluminium alloy shell of a bullet.

Description

technical field [0001] The invention relates to the technical field of plastic processing of a thin-walled revolving body, in particular to a method for spinning an aluminum alloy thin-walled revolving body. Background technique [0002] The structure of the charge body of the missile warhead is a thin-walled body of revolution, and the material is ultra-high-strength steel or rust-proof aluminum alloy. With the expansion of tactical requirements, more and more manufacturing materials will be converted to aluminum alloy. Reduce the specific gravity of the powder shell, increase the specific gravity of the ammunition, and improve the power of the weapon; the shape also changes from a straight line to a curved shape, which can reduce air resistance and lead accurately. However, there is currently no efficient and low-cost process for processing aluminum alloy shells. The traditional two methods are machine addition method and stamping welding method. Machining method is to f...

Claims

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Application Information

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IPC IPC(8): B21D51/54B21D22/16B21D51/10
CPCB21D22/16B21D51/10B21D51/54
Inventor 陈振蒋帮宏张军刘虎
Owner 湖北三江航天江北机械工程有限公司
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