CN110283028B - Method for directly manufacturing raw material of high-solid-phase-content high-density energetic grain - Google Patents
Method for directly manufacturing raw material of high-solid-phase-content high-density energetic grain Download PDFInfo
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- CN110283028B CN110283028B CN201910571796.9A CN201910571796A CN110283028B CN 110283028 B CN110283028 B CN 110283028B CN 201910571796 A CN201910571796 A CN 201910571796A CN 110283028 B CN110283028 B CN 110283028B
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- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
- C06B21/0033—Shaping the mixture
- C06B21/0041—Shaping the mixture by compression
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Abstract
A raw material direct manufacturing method of a high solid content high-density energetic grain comprises the steps of firstly, carrying out layered dispersion on three-dimensional data of a target sample piece to obtain manufacturing data required by printing; then, carrying out grading treatment on the powder material, then loading, diluting the binder, carrying out vacuum treatment, and then loading; a layer of powder is spread on the working platform by using a press roller, then the adhesive is extruded out at the corresponding position by a glue dispenser, after printing of one layer is finished, the layer is pressed tightly by a press roller head, and the working platform moves down one layer; repeating the processes of powder laying, binder extrusion, compaction and downward movement of the working platform until the target sample piece layer thickness is reached, namely completing the direct manufacturing process of the raw material of the high solid content high-density energetic grain of the target sample piece; the invention can realize the mixing of the energetic powder material and the binder in the manufacturing process under the condition of high safety coefficient, and efficiently realizes the rapid manufacturing of the energetic grain with controllable gradient performance, high solid content and high compactness.
Description
Technical Field
The invention belongs to the technical field of energetic material manufacturing, and particularly relates to a method for directly manufacturing a raw material of a high-solid-phase content high-density energetic grain.
Background
The energetic material is an important support in the fields of aerospace, national defense, military industry and the like, and the performance of the energetic material is closely related to the performance of a weapon and is one of important factors for determining the advanced degree of the weapon. The traditional manufacturing method of the energy-containing grain mainly comprises mixing, mould pressing and the like, but has the defects of long consumed time, complex process and the like; moreover, because the energetic material has high energy density, explosion is easy to occur in the manufacturing process, and the material is unsafe; meanwhile, the traditional energetic material manufacturing method has the defects of low solid content, low density and the like.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a method for directly manufacturing a raw material of an energy-containing grain with high solid content and high density, which can realize safe printing of the energy-containing material with high solid content and high density without pre-mixing and saves time.
In order to achieve the purpose, the invention adopts the technical scheme that:
a method for directly manufacturing a raw material of a high solid content high-density energetic grain comprises the following steps:
a) carrying out layered dispersion on the three-dimensional data of the target sample piece: under a cylindrical coordinate system, performing discrete processing, path planning and process parameter setting on the three-dimensional data of a target sample piece to obtain manufacturing data required by printing, and inputting the manufacturing data into a motion control system;
b) treatment and charging of raw materials: grading energy-containing powder materials, uniformly mixing the powder with different particle sizes together according to a proportion so that the powder has higher compactness in a compacted state, and filling the graded energy-containing material powder into a powder feeding cylinder 8; diluting the binder to ensure that the binder is sufficiently immersed between energetic material powder particles, performing vacuum treatment on the binder to ensure that no air exists in the binder, and loading the treated binder into a laminator 3;
c) powder laying and binding of binder: the powder feeding platform rises by one layer, a layer of powder is paved on the working platform 5 by using a press roller 7, the adhesive is extruded by the adhesive dispenser 3 in a corresponding area on the working platform 5 according to a designed path, and a heating module is arranged at a nozzle of the adhesive dispenser 3 to reduce the viscosity of the adhesive; combining and molding energetic material powder under the action of a binder, sweeping the working platform 5 by the compression roller 7 again, compacting the printing layer, and moving the working platform 5 downwards by one layer;
d) repeating the step c) until the dispenser 3 finishes scanning the track and reaches the layer thickness of the target sample piece, namely finishing the manufacturing process of the target sample piece; after the manufacture is finished, the working platform 5 and the powder feeding platform are lifted to the highest position, high-speed airflow is ejected from the air ejection opening 1, redundant powder is blown to the powder recovery device 6, and the recovery of the powder is finished.
The equipment adopted by the method for directly manufacturing the raw materials of the high-solid-phase-content high-density energetic grain comprises a working platform 5, wherein the working platform 5 is matched with a powder feeding platform, the powder feeding platform consists of a powder feeding cylinder 8 and a compression roller 7, a dispenser 3 is arranged above the working platform 5, a heating module is arranged on a nozzle of the dispenser 3, the powder feeding platform and the compression roller 7 move under the control of a motion control system, an air nozzle 1 is arranged on one side of the working platform 5, and a recovery device 6 is arranged on the other side of the working platform 5.
And a temperature detection device 2 is arranged at the contact point of the nozzle of the dispenser 3 and the working platform 5.
In the direct manufacturing method of the raw material of the high solid content high-density energetic grain, the man-machine separation is adopted, and operators and equipment are physically separated.
The invention has the following beneficial effects:
the method of the invention improves the manufacture of the energetic grain from pre-mixing to the direct manufacture and processing of raw materials, not only solves the problems of low solid content and low compactness of the grain manufactured by the former, but also solves the safety problem easily caused by pre-mixing. If a more complex mechanism is introduced, different types of adhesives are filled in the dispensing machines, and the good control of the dispensing machines is realized by using a code program, gradient printing of the target sample piece can be realized by adopting different adhesives in different layers or different areas of one layer of the target sample piece, so that the function which cannot be realized by a pre-mixing method can be obtained.
The invention can directly process the raw materials under the condition of high safety coefficient, and efficiently realizes the rapid manufacture of the energetic grain with controllable gradient performance, high solid content and high compactness.
Drawings
FIG. 1 is a schematic view of the structure of an apparatus used in the method of the present invention.
FIG. 2 is a control diagram of an apparatus used in the method of the present invention.
Detailed Description
The method of the present invention is described in detail below with reference to the accompanying drawings and examples.
Referring to fig. 1 and 2, a high solid content is high, and raw and other materials direct manufacturing equipment of fine and close energetic powder column, including work platform 5, work platform 5 and the cooperation of powder feeding platform, the powder feeding platform is by powder feeding jar 8, compression roller 7 constitutes, work platform 5 top is equipped with point gum machine 3, be equipped with heating module on the nozzle of point gum machine 3, the powder feeding platform, compression roller 7 passes through motion control system control motion, one side of work platform 5 is equipped with air jet 1, the opposite side of work platform 5 is equipped with recovery unit 6.
From the aspect of safety, all electrodes used in the equipment are subjected to dustproof treatment; the contact point of the nozzle and the working platform 5 is provided with a temperature detection device 2, and the work is stopped once the temperature is overhigh.
For a cylindrical energetic grain, referring to fig. 2, a method for directly manufacturing a raw material of a high solid content high-density energetic grain comprises the following steps:
a) carrying out layered dispersion on the three-dimensional data of the target sample piece: the size of the energetic grain 4 to be printed is determined as a cylindrical grain with the height of 100mm, the inner diameter of 20mm and the outer diameter of 50 mm; the energetic material uses nanometer aluminite powder and ammonium perchlorate powder, and the binder uses thermoplasticity PEG, under the cylindrical coordinate system, utilizes commercial software to carry out the discrete processing back to the three-dimensional data that contains energetic powder column 4 to plan extrusion path and the formulation printing parameter of point gum machine 3, input motion control system: the printing path is a single-track reciprocating spiral scanning mode, the layering thickness is 0.1mm (0.05mm-0.2mm), the scanning interval is 0.5mm (0.2mm-0.5mm), and the scanning speed is 2mm/s (1mm/s-5 mm/s);
b) treatment and charging of raw materials: vacuumizing 500ml (100ml-1L) of adhesive for 15min (10min-15min), loading the processed adhesive into a laminator 3, and loading energetic material powder into a powder feeding cylinder 8;
c) powder laying and binding of binder: a layer of powder is paved on the working platform 5 by a press roller 7 at the speed of 100mm/s (10mm/s-500mm/s), a glue dispenser 3 extrudes a binder at the corresponding position of the first layer, the press roller 7 compacts the printing layer at the speed of 10mm/s (10mm/s-20mm/s), the first layer is printed, and then the working platform 5 moves downwards by 0.1mm (50 mu m-200 mu m);
d) and c) repeating the step c) until all the target sample pieces are printed, raising the working platform 5 and the powder feeding platform to the highest, ejecting airflow from the air jet 1 at the flow rate of 20L/min (10L/min-50Lmin), and blowing unused powder into the recovery device 6 at the bottom to finish the recovery of the powder material.
In the direct manufacturing method of the raw material of the high solid content high-density energetic grain, the man-machine separation is adopted, the operators and the equipment are physically separated, and even if an accident occurs in the manufacturing process, the operators cannot be injured.
Claims (2)
1. A method for directly manufacturing raw materials of a high solid content high-density energetic grain is characterized by comprising the following steps:
a) carrying out layered dispersion on the three-dimensional data of the target sample piece: under a cylindrical coordinate system, performing discrete processing, path planning and process parameter setting on the three-dimensional data of a target sample piece to obtain manufacturing data required by printing, and inputting the manufacturing data into a motion control system;
b) treatment and charging of raw materials: grading energy-containing powder materials, uniformly mixing the powder with different particle sizes together according to a proportion so that the powder has higher compactness in a compacted state, and filling the graded energy-containing material powder into a powder feeding cylinder (8); diluting the binder to ensure that the binder is sufficiently immersed between energetic material powder particles, performing vacuum treatment on the binder to ensure that no air exists in the binder, and filling the treated binder into a dispenser (3);
c) powder laying and binding of binder: the powder feeding platform rises by one layer, a layer of powder is laid on the working platform (5) by using a press roll (7), the adhesive is extruded by the adhesive dispenser (3) in a corresponding area on the working platform (5) according to a designed path, and a heating module is arranged at a nozzle of the adhesive dispenser (3) to reduce the viscosity of the adhesive; combining and molding energetic material powder under the action of a binder, sweeping the working platform (5) by the compression roller (7) again, compacting the printing layer, and moving the working platform (5) one layer downwards;
d) repeating the step c) until the glue dispenser (3) finishes scanning the track and reaches the layer thickness of the target sample piece, namely finishing the manufacturing process of the target sample piece; after the powder recovery device is manufactured, the working platform (5) and the powder feeding platform are lifted to the highest, high-speed airflow is ejected from the air ejection opening (1), redundant powder is blown to the powder recovery device (6), and the powder recovery is completed;
the equipment adopted by the method for directly manufacturing the raw material of the high-solid-phase-content high-density energetic grain comprises a working platform (5), wherein the working platform (5) is matched with a powder feeding platform, the powder feeding platform consists of a powder feeding cylinder (8) and a compression roller (7), a dispenser (3) is arranged above the working platform (5), a heating module is arranged on a nozzle of the dispenser (3), the powder feeding platform and the compression roller (7) are controlled to move by a motion control system, one side of the working platform (5) is provided with an air jet (1), and the other side of the working platform (5) is provided with a recovery device (6);
and a temperature detection device (2) is arranged at the contact point of the nozzle of the dispenser (3) and the working platform (5).
2. The method for directly manufacturing the raw material of the high solid content high density energetic grain according to claim 1, which is characterized in that: in the direct manufacturing method of the raw material of the high solid content high-density energetic grain, the man-machine separation is adopted, and operators and equipment are physically separated.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009140635A1 (en) * | 2008-05-16 | 2009-11-19 | Digital Solid State Propulsion Llc | Electrode ignition and control of electrically ignitable materials |
| CN106431788A (en) * | 2016-10-27 | 2017-02-22 | 西北工业大学 | Micro grain moulding device based on 3D printing and method thereof |
| CN108339937A (en) * | 2018-02-07 | 2018-07-31 | 北京机科国创轻量化科学研究院有限公司 | A kind of high-performance and high accuracy sand mold（Core）3D printing manufacturing process |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009140635A1 (en) * | 2008-05-16 | 2009-11-19 | Digital Solid State Propulsion Llc | Electrode ignition and control of electrically ignitable materials |
| CN106431788A (en) * | 2016-10-27 | 2017-02-22 | 西北工业大学 | Micro grain moulding device based on 3D printing and method thereof |
| CN108339937A (en) * | 2018-02-07 | 2018-07-31 | 北京机科国创轻量化科学研究院有限公司 | A kind of high-performance and high accuracy sand mold（Core）3D printing manufacturing process |
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Effective date of registration: 20210715 Address after: 100191 No. 37, Haidian District, Beijing, Xueyuan Road Patentee after: BEIHANG University Address before: Beilin District Xianning West Road 710049, Shaanxi city of Xi'an province No. 28 Patentee before: XI'AN JIAOTONG University |
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