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Preparation method of uniform low-stress value cone-shaped charge cover

A liner and low-stress technology, applied in the field of preparation of conical liners with uniform low stress values, can solve problems affecting product quality stability, uneven distribution, etc., to ensure dimensional accuracy, surface quality, and utilization High, good product size consistency

Active Publication Date: 2018-05-08
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

Through reverse engineering analysis and modern material analysis methods, it is shown that the average stress value of foreign cold-extruded pure copper liner is 10-30 MPa, and the deviation of cone angle is ≤ 2′. The top stress of domestic cold-extruded conical liner is The value reaches 120-200MPa, and the distribution is uneven, which seriously affects the stability of product quality

Method used

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  • Preparation method of uniform low-stress value cone-shaped charge cover
  • Preparation method of uniform low-stress value cone-shaped charge cover
  • Preparation method of uniform low-stress value cone-shaped charge cover

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041](1) Preparation of blanks: Take the variable-wall-thick drug-mask whose internal shape is a double-cone structure as an example. The small cone angle at the top is 30°, the large cone angle is 60°, and the transition arc between the large cone angle and the small cone angle is R152mm; according to the theory of plastic forming and the principle of near-uniform plastic deformation, a 1mm gap is left on the outer surface of the medicine cover The machining allowance is designed with a φ20mm forming process boss on the cone top of the drug cover; UG and DEFORM software are used to simulate, analyze and optimize the forming process, and the volume of the blank is calculated, and the extruded T2 copper rod of φ90mm is selected as Raw materials, cutting and turning the outer surface to make a blank with a diameter of 88mm and a height of 55mm; the impurity element content of the T2 red copper rod is as shown in Table 1:

[0042] Table 1 Content of impurity elements in T2 coppe...

Embodiment 2

[0057] (1) Preparation of the blank: Take the equal-wall-thick liner whose internal shape is a single-cone structure as an example. The liner has a diameter of φ160mm, a height of 152mm, an inner cone depth of 138mm, a wall thickness of 4.2mm, and an inner cone angle of 60°. , according to the theory of plastic forming and the principle of near-uniform plastic deformation, a machining allowance of 0.8mm is left on the outer surface of the multi-pass extruded drug cover, and a φ15mm forming process boss is designed on the top of the drug cover. ;Use UG and DEFORM software to simulate the forming process, and calculate the volume of the billet, select the drawn T2 copper rod with a diameter of 50mm as the raw material, blank the material and turn the outer surface to make a billet with a diameter of 49mm and a height of 80mm.

[0058] (2) Homogenization heat treatment: heat the blank obtained in step (1) in a VQG-2500 intelligent temperature-controlled vacuum heat treatment furna...

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Abstract

The invention provides a preparation method of a uniform low-stress value cone-shaped charge cover. The preparation method comprises the steps: multi-pass extrusion moulding, vibrating ageing treatment and deep cooling treatment, wherein the multi-pass extrusion moulding is 4-8 pass extrusion deformation under the action of three-directional pressure stresses and deformation rates of 5-10mm / s, wherein the deformation amount of each pass is 5-50%. The uniform low-stress value cone-shaped charge cover prepared by the method provided by the invention is high in dimensional precision, good in geometric symmetry and low in stress value, is good in dimensional stability in precise cutting machining and using processes, and can enhance the penetration ability and the stability of the cone-shapedcharge cover of a armor penetration warhead remarkably.

Description

technical field [0001] The invention relates to the technical field of metal plastic forming, in particular to a method for preparing a uniform low-stress conical medicine-shaped mask. Background technique [0002] A typical shaped charge jet has a high head velocity (≥8500m / s) and a low tail velocity (about 3000m / s). This velocity gradient enables the jet to be drawn very long under a certain blasting height (up to 20 to 100 times the caliber length of the medicine mask), with high penetration ability. The penetrating ability of the jet is proportional to the length of the continuous jet, but due to the internal defects of the metal and the expansion of the jet, the jet will eventually break into segments of particles in the axial direction, which limits the length of the continuous jet and the penetration energy. Transmission, and the mutual disturbance between the fractured particles, the penetration ability drops sharply. [0003] 98% of the existing armor-piercing war...

Claims

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Application Information

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IPC IPC(8): C22F1/08C21D9/00B21K21/06
CPCB21K21/06C21D9/0068C22F1/002C22F1/08F42B1/036F42B1/028F42B1/032F42B33/0271F42B33/0257B21C23/001B21C23/14
Inventor 陈强舒大禹赵强康凤黄树海张帷赵祖德夏祥生
Owner NO 59 RES INST OF CHINA ORDNANCE IND
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