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A low-stress and weak-texture control method for a pure copper disk medicine-shaped cover

A control method and the technology of the liner, which is applied in the field of metal plastic forming, can solve the problems of strong texture at the top of the liner, uneven grain size, and poor isotropy of the plate, so as to improve the penetration ability and stability , high material utilization rate, and the effect of improving processing efficiency

Active Publication Date: 2020-05-01
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 existing technology is mainly cutting and stamping. This process has the following disadvantages: first, the grain size is uneven, and there are large-sized grains in the weak deformation area; second, the isotropy of the plate is poor, and the performance is unstable; The yield rate of the material is low and the manufacturing cost is high; the fourth is that the top texture of the drug-shaped cover is strong, the mouth is weak, and the symmetry is not high

Method used

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  • A low-stress and weak-texture control method for a pure copper disk medicine-shaped cover
  • A low-stress and weak-texture control method for a pure copper disk medicine-shaped cover
  • A low-stress and weak-texture control method for a pure copper disk medicine-shaped cover

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A preparation method of a medicine-shaped cover, carried out according to the above steps:

[0042](1) Preparation of the blank: Take the EFP disc-shaped medicine cover with arc-cone structure as an example, the diameter is 114mm, the outer spherical surface radius is 126mm, the inner spherical surface radius is 145mm, the cone angle is 33°, the spherical crown height is 25.6mm, and the bottom wall thickness 3.8mm; according to the theory of plastic forming and the principle of near-uniform plastic deformation, a 2.5mm machining allowance is left on one side of the flange of the outer diameter of the drug cover, and a φ5mm positioning boss is designed at the bottom of the spherical center of the drug cover; Use UG and DEFORM software to simulate, analyze and optimize the extrusion forming process of the liner, calculate the billet volume and size specifications, select T2 pure copper cold-drawn rods with a size of φ50×26.2mm, and the content of impurity elements in the r...

Embodiment 2

[0057] A preparation method of a medicine-shaped cover, carried out according to the above steps:

[0058] (1) Preparation of the blank: Take the EFP disc-shaped medicine cover with arc-cone structure as an example, the diameter is 142mm, the outer spherical surface radius is 138mm, the inner spherical surface radius is 152mm, the cone angle is 38°, the spherical crown height is 29.4mm, and the bottom wall thickness 4.5mm; according to the theory of plastic forming and the principle of near-uniform plastic deformation, a 2.5mm machining allowance is left on one side of the flange of the outer diameter of the drug cover, and a φ5mm positioning boss is designed at the bottom of the spherical center of the drug cover ; Use UG and DEFORM software to simulate, analyze and optimize the forming process, calculate the blank volume and size specifications, and select TU1 pure copper rod with a diameter of φ55×42mm.

[0059] (2) Gradient variable temperature cumulative large plastic ext...

Embodiment 3

[0071] A preparation method of a medicine-shaped cover, carried out according to the above steps:

[0072] (1) Preparation of the blank: Take the EFP disc-shaped medicine cover with arc-cone structure as an example, the diameter is 100mm, the outer spherical surface radius is 112mm, the inner spherical surface radius is 126mm, the cone angle is 22°, the spherical crown height is 21.4mm, and the bottom wall thickness It is 3.2mm; according to the theory of plastic forming and the principle of near-uniform plastic deformation, a 2.5mm machining allowance is left on one side of the flange of the outer diameter of the liner, and a positioning boss of φ5mm is designed at the bottom of the spherical center of the liner ; Use UG and DEFORM software to simulate, analyze and optimize the forming process, calculate the blank volume and size specifications, and select TU1 pure copper rod with a diameter of φ40×21mm.

[0073] (2) Gradient variable temperature cumulative large plastic extr...

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Abstract

The invention provides a low-stress weak texture control method for a pure copper disc type cartridge shape cover. The method comprises gradient temperature changing accumulation large plasticity extrusion forming, cold precision shape correcting, vibration aging and low-temperature stress removal. In gradient temperature changing accumulation large plasticity extrusion forming, the preheating temperature ranges from 300 DEG C to 510 DEG C, and the heating time ranges from 30 s to 90 s; and then the deformation temperature ranges from 280 DEG C to 490 DEG C, and the heat preservation time ranges from 1 h to 3 h. The method solves the technical problems that according to a conventional plastic forming method, texture is serious, symmetry is poor, and a structure is uneven; and dual controlover the accurate cartridge shape cover boundary dimension and the inner uniform structure is achieved, and the penetration capability and stability of the cartridge shape cover are improved.

Description

technical field [0001] The invention belongs to metal plastic forming technology, in particular to a low-stress and weak texture control method of a pure copper disc medicine-shaped cover. Background technique [0002] Explosively Formed Projectile (EFP) is a penetrating body formed by extruding, flipping and stretching under the action of detonation energy under the action of detonation energy. The speed of about / s penetrates the cluster armored target, and the maximum thickness of the armor-piercing reaches 1.2 times the diameter of the charge. It is the "nemesis" weapon against modern armored vehicles. [0003] In the 1980s, with the development of computer, precision charge and detonation technology, the EFP warhead technology made progress, and the EFP with apron and tail was designed to improve the aerodynamic stability and reduce the flight resistance, which ensured that the EFP could fly with a smaller Angled penetrating armor, improving hit accuracy and armor-pier...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/08C22F3/00
CPCC22F1/08C22F3/00
Inventor 舒大禹陈强赵强吴洋赵祖德夏祥生屈俊岑王长朋李辉
Owner NO 59 RES INST OF CHINA ORDNANCE IND
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