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A high-quality preparation method of a short-arc spherical crown drug-shaped mask

A medicine type cover and arc technology, which is applied in the field of precision machining of short arc spherical cap medicine type cover, can solve the problems of poor surface quality and uneven organization of turning machining, and achieve the improvement of tool life, reduction of cutting temperature and material utilization rate. high effect

Active Publication Date: 2019-09-24
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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  • A high-quality preparation method of a short-arc spherical crown drug-shaped mask
  • A high-quality preparation method of a short-arc spherical crown drug-shaped mask
  • A high-quality preparation method of a short-arc spherical crown drug-shaped mask

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Experimental program
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Effect test

Embodiment 1

[0036] (1) Preparation of the blank: The outer diameter of the short-arc spherical cap is 108mm, the outer spherical radius is 118mm, the inner spherical radius is 142mm, the cone angle is 27°, the spherical crown height is 23.2mm, and the bottom wall thickness is 3.5mm; Processing forming theory and nearly uniform plastic deformation principle, leaving a 3mm machining allowance on one side of the flange part of the outer diameter of the medicine cover, and designing a φ4mm positioning bump at the bottom of the spherical center of the medicine cover; using UG and DEFORM software The forming process is simulated, analyzed and optimized, the volume and size of the blank are calculated, and the diameter of Ta2.5W alloy bar is φ50×21.5mm.

[0037] (2) Rotary riveting forming: Put the blank obtained in step (1) into the cavity of the pre-forming mold, using a hydraulic rotary riveting machine (MYXM6300), under the action of three-directional compressive stress, the riveting head speed ...

Embodiment 2

[0047] (1) The preparation of the blank: the diameter of the short-arc spherical cap is 139mm, the outer spherical radius is 140mm, the inner spherical radius is 155mm, the cone angle is 33°, the spherical crown height is 23.8mm, and the bottom wall thickness is 3.8mm; according to plasticity Processing forming theory and nearly uniform plastic deformation principle, leaving a 3mm machining allowance on one side of the flange part of the outer diameter of the medicine cover, and designing a φ4mm positioning bump at the bottom of the spherical center of the medicine cover; using UG and DEFORM software The forming process is simulated, analyzed and optimized, the blank volume and size specifications are calculated, and the diameter of the Ta5W alloy bar is φ65×17mm.

[0048] (2) Rotary riveting forming: Put the blank obtained in step (1) into the cavity of the pre-forming mold, using a hydraulic rotary riveting machine (MYXM6300), under the action of three-way compressive stress, th...

Embodiment 3

[0058] (1) Preparation of the blank: The diameter of the short-arc spherical crown cap is 142mm, the outer spherical radius is 136mm, the inner spherical radius is 148mm, the spherical crown height is 24.6mm, and the bottom wall thickness is 4.8mm; according to the theory of plastic processing and nearly uniform The principle of plastic deformation is to leave a machining allowance of 3mm on one side of the flange part of the outer diameter of the medicine cover, and design a φ4mm positioning bump at the bottom of the spherical center of the medicine cover; use UG and DEFORM software to simulate and analyze the forming process. Optimize, calculate the blank volume and size specifications, choose Ta10W alloy bar diameter φ50×18mm.

[0059] (2) Rotary riveting forming: Put the blank obtained in step (1) into the cavity of the pre-forming mold, using a hydraulic rotary riveting machine (MYXM6300), under the action of three-way compressive stress, the riveting head speed is 1800r / min,...

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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 the metal plastic forming technology, in particular to the technical field of precision processing of a short-arc spherical crown cap. 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 large explosive heights. It is a rod jet (JPC) and explosively formed projectile (EFP) type cover One of the ideal materials. In the 1990s, foreign countries developed tantalum, tantalum-tungsten alloy and other high-density drug-type covers, such as the US SADARM, German SMART, Swedish BONUS, French ACED155 and other warheads, which have been deployed on a large scale. [0003] According to related literature, the manufacturing technology of tantalum and tantalum-tungsten alloy drug-shaped cover applied at home and abroad mainly includes bar turning processing, sheet stamping forming, spinning fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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