Copper conic liner and preparation method thereof

A technology of drug-type cover and cover-top, applied in the field of drug-type cover, which can solve problems such as uneven internal structure of drug-type cover, large material consumption, unfavorable metal jet extension, etc., to improve penetration performance and material utilization The effect of high rate and dense tissue

Active Publication Date: 2017-05-24
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) A large amount of material is consumed in the turning process and the material utilization rate is low;
[0005] (2) The internal structure of the prepared drug-type cover is the original structure of the rod, and there are coarse grains, which is not conducive to the extension of the metal jet;
[0007] (1) The dimensional accuracy is low, and there is a difference in wall thickness, which affects the performance of the metal jet;
[0008] (2) There are many production processes and high requirements for molds;
[0009] (3) The internal structure of the drug-type cover is not uniform, and there are textures with different orientations, which will cause the instability of the metal jet

Method used

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  • Copper conic liner and preparation method thereof

Examples

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Effect test

preparation example Construction

[0025] A preparation method of a copper medicine-shaped cover, the steps are as follows:

[0026] Step 1, establishing a solid model of the drug-type cover, and then processing the solid model to obtain the geometric information of each section, and converting the geometric information of each section into the information of the movement track of the CNC workbench;

[0027] Step 2: Fix the substrate on the CNC workbench with five-axis linkage, and use the synchronous powder feeding method to send the copper powder into the irradiation range of the laser beam through the powder feeder and coaxial nozzle for melting. At this time, the CNC workbench according to The movement trajectory information obtained in step 1 moves, and the molten copper forms the first layer of cladding layer on the substrate after cooling and solidification, and the cladding layer is rapidly cooled by the water cooling system under the substrate to increase the temperature gradient while keeping the heat ...

Embodiment 1

[0032] A kind of preparation method of copper drug type cover, its preparation steps are as follows:

[0033] (1) Put the 150-325 mesh spherical copper powder into a vacuum drying oven for drying treatment to remove the moisture adsorbed on the powder surface. The holding temperature is 100°C and the holding time is 20 hours.

[0034] (2) Use DZ22 directionally solidified nickel-based superalloy as the substrate, cut it into a cylindrical sample with a diameter of 30 mm and a thickness of 10 mm, and use a metallographic sample pre-grinder and 400# water sandpaper to remove the surface of the substrate. Rust and surface treatment. Finally, place the substrate in an ultrasonic cleaning machine, add acetone solution, and wash for 10 minutes to degrease the substrate.

[0035] (3) Generate the solid model of the medicine mask through CAD and store it as an STL format file, and then process the solid model with layered software to obtain the geometric information of each section a...

Embodiment 2

[0040] A kind of preparation method of copper drug type cover, its preparation steps are as follows:

[0041] (1) Dry the spherical copper powder with a mesh size of 150-325 according to the method described in Example 1.

[0042] (2) DZ22 directionally solidified nickel-based superalloy was used as the substrate, and the surface of the substrate was derusted and degreased according to the method described in Example 1.

[0043] (3) Generate the solid model of the medicine mask through CAD and store it as an STL format file, and then process the solid model with layered software to obtain the geometric information of each section and convert it into the information of the movement track of the CNC workbench.

[0044] (4) Install the substrate on a five-axis linkage workbench, use a fiber laser with a rated power of 2kW as the laser equipment, and adopt the synchronous powder feeding method, the laser beam rapidly heats and melts the copper powder ejected from the coaxial powde...

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Abstract

The invention discloses a copper conic liner and a preparation method thereof. The copper conic liner comprises a supporting column body, a liner top, an inner wall surface and an outer wall surface, wherein the supporting column body is connected with the liner top. The preparation method is characterized in that a laser fusion covering type rapid forming method is adopted; the temperature gradient of a bath formed by laser beams is utilized, and the hot flow dispersing direction is controlled through a water cooling system, on that basis, small columnar dendrite grains in a fusion covering layer can directionally grow in the axis direction of the liner, and thus the liner of which each part has the directional solidifying structure property can be prepared. The copper conic liner prepared by the method is outstanding in stretching performance in the axis direction, so that the metal jet extending performance can be effectively improved, the jet breakup time can be prolonged, and as a result, the penetration performance can be improved; in addition, the preparation method has the advantages of being short in formation time, high in size accuracy, and high in material utilization rate.

Description

technical field [0001] The invention relates to the technical field of medicine-shaped masks, in particular to a copper medicine-shaped mask and a preparation method thereof. Background technique [0002] The liner is a key component used to form a shaped charge in a shaped charge structure, and it is widely used in armor-piercing bullets for penetrating buildings and armor and perforating bullets for oil extraction. In order to improve the length and stability of the jet, it is usually required that the drug-type cover material has good ductility and thermal conductivity, high sound velocity and density and other properties. Copper is currently the most widely used material in drug-type covers because it has good comprehensive properties (good plasticity and thermal conductivity, high sound velocity) and is easy to process. [0003] At present, the methods for preparing the copper drug-type cover mainly include turning forming and stamping forming. The turning forming met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105C22F1/08F42B12/74E21B43/116
CPCY02P10/25
Inventor 杨森王广原顾赛男张佳子
Owner NANJING UNIV OF SCI & TECH
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