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High-quality preparation method of short-arc spherical crown shaped charge cover

A medicine-shaped cover and arc technology, which is applied in the field of precision machining of short-arc spherical crown medicine-shaped covers, can solve problems such as uneven organization and poor turning surface quality, reduce cutting temperature, increase tool life, and ensure size The effect of precision

Active Publication Date: 2018-09-18
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

[0005] The technical problem solved by the present invention is to provide a high-quality preparation method of a short-arc spherical crown drug-shaped cover, through the method of riveting forming + freezing cutting processing, to solve the problem of uneven structure and poor surface quality of turning processing in conventional plastic forming methods ( figure 1 ) technical problems, realize multiple control of shape, size, microstructure and surface quality, and give full play to the advantages of high penetration performance of tantalum and tungsten materials

Method used

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  • High-quality preparation method of short-arc spherical crown shaped charge cover
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  • High-quality preparation method of short-arc spherical crown shaped charge cover

Examples

Experimental program
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Effect test

Embodiment 1

[0036] (1) Preparation of the blank: the outer diameter of the short arc spherical crown is 108mm, the outer spherical radius is 118mm, the inner spherical radius is 142mm, the cone angle is 27°, the height of the spherical crown is 23.2mm, and the bottom wall thickness is 3.5mm; according to the plasticity Based on the processing forming theory and the principle of near-uniform plastic deformation, a 3mm machining allowance is left on one side of the flange of the outer diameter of the drug-type cover, and a φ4mm positioning bump is designed on the bottom of the spherical center of the drug-type cover; UG and DEFORM software are used to The forming process is simulated, analyzed and optimized, and the volume and size of the billet are calculated. The Ta2.5W alloy rod is selected with a diameter of φ50×21.5mm.

[0037] (2) Spin riveting forming: Put the blank obtained in step (1) into the cavity of the preforming mold, and use a hydraulic riveting machine (MYXM6300), under the ...

Embodiment 2

[0047] (1) Preparation of the blank: the diameter of the short-arc spherical crown is 139mm, the radius of the outer spherical surface is 140mm, the radius of the inner spherical surface is 155mm, the cone angle is 33°, the height of the spherical crown is 23.8mm, and the wall thickness of the bottom is 3.8mm; according to the plasticity Based on the processing forming theory and the principle of near-uniform plastic deformation, a 3mm machining allowance is left on one side of the flange of the outer diameter of the drug-type cover, and a φ4mm positioning bump is designed on the bottom of the spherical center of the drug-type cover; UG and DEFORM software are used to The forming process is simulated, analyzed and optimized to calculate the volume and size of the billet, and the diameter of the Ta5W alloy rod is selected to be φ65×17mm.

[0048] (2) Spin riveting forming: put the blank obtained in step (1) into the cavity of the preforming mold, and use a hydraulic riveting mac...

Embodiment 3

[0058] (1) Preparation of the blank: the diameter of the short-arc spherical crown is 142mm, the radius of the outer spherical surface is 136mm, the radius of the inner spherical surface is 148mm, the height of the spherical crown is 24.6mm, and the wall thickness of the bottom is 4.8mm; according to the theory of plastic processing and nearly uniform Based on the principle of plastic deformation, a 3mm machining allowance is left on one side of the flange of the outer diameter of the liner, and a φ4mm positioning bump is designed at the bottom of the spherical center of the liner; UG and DEFORM software are used to simulate and analyze the forming process and Optimization, calculation of billet volume and size specifications, selection of Ta10W alloy rod diameter φ50×18mm.

[0059] (2) Rotary riveting forming: put the blank obtained in step (1) into the cavity of the preforming mold, and use a hydraulic riveting machine (MYXM6300), under the action of three-dimensional compres...

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Abstract

The invention provides a preparation method of a short-arc spherical crown shaped charge cover. The preparation method of the short-arc spherical crown shaped charge cover comprises the steps of spin-riveting for forming, carrying out recrystallizing heat treatment, and freeze cutting, wherein the spin-riveting for forming is characterized by point contact high pressure extrusion forming through spinning and riveting; the freeze cutting is used for cooling by adopting liquid nitrogen; and the liquid nitrogen flow is 250g to 500g / min. According to the preparation method of the short-arc spherical crown shaped charge cover provided by the invention, the shaped charge cover with a uniform and fine annealing recrystallization texture structure is obtained; and the cutting temperature and the wearing capacity of the cutter are reduced, so that the easiness in breaking through cutting is realized, not only is the dimensional accuracy ensured, but also the surface brightening is realized, andmeanwhile, the production efficiency of the product is further improved.

Description

technical field [0001] The invention belongs to metal plastic forming technology, in particular to the technical field of precision machining of a short-arc spherical crown drug-shaped cover. Background technique [0002] Tantalum has high density, high dynamic ductility and excellent penetration performance, which can significantly improve the penetration ability and anti-interference ability at high explosion heights. One of the ideal materials. In the 1990s, high-density drug-type covers such as tantalum and tantalum-tungsten alloys were developed abroad. Warheads such as SADARM in the United States, SMART in Germany, BONUS in Sweden, and ACED155 in France have been installed in large-scale troops. [0003] According to the relevant literature, the manufacturing technologies of tantalum and tantalum-tungsten alloy drug covers used at home and abroad mainly include bar turning, sheet metal stamping, spinning and rolling forming, such as the University of Texas After stud...

Claims

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Application Information

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IPC IPC(8): F42B3/22B23P15/00
Inventor 舒大禹陈强赵祖德赵强林军屈俊岑康凤夏祥生李辉
Owner NO 59 RES INST OF CHINA ORDNANCE IND
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