CN113378250A - Parameter adaptation system for solidification molding of projectile fusion cast explosive and generation method - Google Patents
Parameter adaptation system for solidification molding of projectile fusion cast explosive and generation method Download PDFInfo
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Abstract
The invention discloses a parameter adaptation system and a generation method for solidification molding of a projectile fusion cast explosive, which comprise a process parameter generation device and an adaptation parameter execution device; the process parameter generating device is used for calculating process parameters of the sequential solidification of the warhead molten-cast explosive charging water bath of the projectile body according to a simulation calculating unit preset by the system to obtain matched process parameters, and the matched process parameters are configured to the executing device; the matched process parameters configured by the process parameter generating device are executed by the adaptive parameter executing device, the uniformity of the radial and axial density of the warhead charge is ensured, the warhead charge is sequentially solidified and precisely formed layer by adopting a charge directional solidification growth method and a charge directional solidification technology, and compared with charge solidification methods such as natural cooling, a heat preservation kiln and the like, the method can effectively reduce the defects of shrinkage cavity, shrinkage porosity, cracks and the like generated in the charge solidification process, thereby improving the density of the fusion cast charge and ensuring the uniformity of the radial and axial density of the warhead charge.
Description
Technical Field
The invention relates to the technical field of penetration type warhead explosive loading, in particular to a parameter adaptation system for solidification molding of a projectile fusion cast explosive and a generation method.
Background
The fusion casting charge forming is a forming method which heats and melts a carrier explosive with a low melting point, adds a high-energy solid phase component, mixes the mixture to form slurry, injects the slurry into a mould or an elastomer, cools and solidifies the slurry into a charge with a certain shape and size. More than 70% of the conventional warheads in China and the non-nuclear warheads in Europe and America, such as America, English, French, Germany, Russia and the like, adopt a fusion casting charging technology in large quantity, and are expected to be main ammunition charging methods for a long time in the future.
The defects such as pores, cracks and the like are easily caused along with the phenomena of physical state change, volume shrinkage, heat release and the like in the casting charge forming process, the viscosity of the casting charge slurry with high solid content is obviously improved, the problems of bubble discharge, shrinkage cavity feeding, thermal stress release and the like in the forming process are more prominent, the defects such as high porosity, more cracks and the like are more likely to occur, the detonation performance is influenced, and the safety use performance of weapons is also influenced. High-overload and deep-penetration ammunition in the future puts forward higher requirements on safety and reliability of charging, and is more easy to cause the generation of hot spot effects such as adiabatic compression and impact collapse of cavities, shearing friction among particles, crack tip viscous heating and the like, so that the safety performance is poor, the charging is disabled, sympathetic explosion is easy, and the stability and the fighting effectiveness of a battle portion are seriously influenced.
Disclosure of Invention
The invention aims to solve the technical problems that the charge density is not high and the density uniformity is poor in charge forming of the conventional DNAN-based high-solid-content fusion-cast explosive prepared by adopting a fusion-casting process, and the like, and aims to provide a parameter adapting system and a generation method for solidification forming of an elastomer fusion-cast explosive.
The invention is realized by the following technical scheme:
the parameter adaptation system for solidification and molding of the projectile fusion cast explosive comprises a process parameter generation device and an adaptation parameter execution device;
the process parameter generation device comprises: the device comprises a display module, a storage module and a processing module, wherein the processing module comprises a simulation calculation unit and a simulation model, and the simulation model comprises: a water bath simulator, a projectile simulator and a bullet cap simulator; the warhead part of the projectile body simulator is inserted into the water bath simulator, and the bullet cap simulator is arranged at the top end of the projectile body simulator;
the process parameter generating device is used for changing the experimental parameters of the simulation model for multiple times by using a simulation calculating unit in the processing module, so that the explosive charging water bath sequence of the cast explosive at the warhead of the projectile is solidified, the target data of a plurality of groups of cooled warhead grains are obtained, the optimal target data in the target data of the plurality of groups of cooled warhead grains are selected, and the experimental parameters of the simulation model of the optimal target data are obtained and serve as the adaptive parameters after calculation;
the adaptive parameter executing device comprises a heat-preservation water tank and water bath guaranteeing equipment, wherein the water bath guaranteeing equipment is used for enabling the heat-preservation water tank to be in the optimal cooling state of the optimal cooling target data;
the method mainly comprises the steps of optimizing precision forming process parameters by using a simulation technology, obtaining better process routes and process parameters, designing manufacturing process equipment on the basis, and carrying out process verification to realize that the whole warhead charge of the projectile body is solidified layer by layer from bottom to top and from outside to inside like a U-shaped layer from the outside and the bottom, so that the probability of defects such as shrinkage cavity, shrinkage porosity and cracks in the middle and at the opening of a formed explosive column is reduced, the charge density of the fused explosive at the warhead is improved, the density difference is reduced, and the whole charge quality is improved.
The explosion-proof cold and hot integrated machine can rapidly heat and rapidly cool the temperature required by equipment, can control different temperatures of a plurality of surface paths, rapidly circulates around the heavy product forming process, and greatly improves the production efficiency.
The MS steam-water separator is used for filtering and removing liquid drops carried in a steam and compressed air system more efficiently by adopting high-temperature nano-filtration, a large amount of steam and compressed air containing water enter the separator and move downwards in the separator in a vertical rotational flow centrifugal and downward inclination direction change mode, and because the densities of gas and liquid are different, if the gas and the liquid need to pass through the filtration together, generally speaking, the liquid can be filtered on the filtration, and the gas can pass through the filtration. And because of neutrality, the gas will still move in the original direction. The liquid left on the filter can be shunted to the bottom of the separator to be condensed and discharged, thereby improving the gas quality and achieving the effect of saturated gas as high as 99.99%.
Furthermore, the experimental parameters of the simulation model are the water bath temperature and the water bath time of the water bath simulator.
Further, the target data of the explosive columns at the warhead of the projectile body comprise shrinkage cavity data of the explosive columns, shrinkage porosity data of the explosive columns and crack data of the explosive columns.
Further, the water bath guarantee equipment comprises a water pipe, a hot air pipe, a steam-water separator, an explosion-proof cooling and heating integrated machine and an explosion-proof hot air blower; the heat-preservation water tank is connected with the explosion-proof cold-hot all-in-one machine through a water pipe; the explosion-proof air heater is connected with the heat-preservation water tank through a hot air pipe, and an air inlet of the steam-water separator is connected with an air outlet of the heat-preservation water tank;
further, the explosion-proof cooling and heating integrated machine is used for performing solidification water circulation with the heat preservation water tank, and the steam-water separator is used for separating moisture contained in gas parts in the heat preservation water tank; the explosion-proof air heater blows hot air to the heat preservation water tank through the hot air pipe;
the parameter generation method for the solidification forming of the projectile fusion cast explosive is based on any one of the parameter adaptation systems for the solidification forming of the projectile fusion cast explosive, and the generation method for the solidification forming adaptation parameters of the fusion cast explosive executes the following steps:
s: calling the warhead structure parameters and the powder charge grain size parameters of the preset projectile body in the storage module, and sending the warhead structure parameters and the powder charge grain size parameters to the processing module as a first instruction;
s: a simulation calculation unit in the processing module receives the first instruction and generates a CAD simulation structure model according to the first instruction;
s: basic data are configured on the generated CAD simulation structure model, and multiple groups of cooling basic data are obtained after simulation processing;
s: carrying out iteration and optimization operation on the multiple groups of cooling basic data to generate matched process parameters, and displaying the matched process parameters through a display module;
s: and configuring the matched process parameters into an adaptive parameter execution device.
Further, the basic data configuration specifically includes configuration of material parameters, configuration of heat exchange coefficient of a contact interface, and configuration of process conditions.
Further, the configuration of the material parameters comprises the configuration of the components of the fusion-cast explosive material, and the components of the fusion-cast explosive material comprise trinitrotoluene, hexogen, aluminum powder and additives.
Further, the configuration of the process conditions comprises a projectile body water-entering movement boundary condition, a projectile body water-entering temperature boundary condition, a projectile body water-entering environment temperature boundary condition and a water bath temperature boundary condition.
Furthermore, the configuration of the heat exchange coefficient of the contact interface comprises an interface connection mode and a heat exchange coefficient which are connected with each other.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the invention relates to a parameter adaptation system and a generation method for solidification and molding of projectile fusion cast explosives, wherein a powder charge directional solidification growth method and a powder charge technology are adopted to sequentially solidify and precisely mold warhead powder charges layer by layer.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a basic flow diagram of proCAST fused cast explosive charging simulation;
FIG. 2 is a schematic view of a fused cast explosive charge sequential solidification apparatus;
FIG. 3 is a diagram of a sequential solidification simulation model;
FIG. 4 is a cross-sectional view of temperature distribution and solid fraction distribution at different times of simulation calculation;
fig. 5 is a hole shrinkage prediction graph of simulation calculation.
Reference numerals
1-a heat preservation water tank simulator; 11-a heat preservation water tank; 2-explosion-proof air heater; 3, an explosion-proof cooling and heating integrated machine; 4-hot air pipes; 5-water pipe; 6-steam-water separator, 7-projectile analog body; 71-an elastomer; 8-bullet cap analogue.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the present invention. In other instances, well-known structures, circuits, materials, or methods have not been described in detail so as not to obscure the present invention.
Throughout the specification, reference to "one embodiment," "an embodiment," "one example," or "an example" means: the particular features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment of the invention. Thus, the appearances of the phrases "one embodiment," "an embodiment," "one example" or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Further, those of ordinary skill in the art will appreciate that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the description of the present invention, it is to be understood that the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the scope of the present invention.
Example one
As shown in fig. 2, the parameter adapting system for solidification and molding of the projectile fusion cast explosive of the embodiment includes a process parameter generating device and an adapting parameter executing device;
the process parameter generation device comprises: display module, storage module and processing module, processing module includes simulation calculation unit and simulation model, and the simulation model includes: a water bath simulator 1, a projectile body simulator 7 and a bullet cap simulator 8; the warhead part of the projectile body simulator 7 is inserted into the water bath simulator 1, and the bullet cap simulator 8 is arranged at the top end of the projectile body simulator 7;
the process parameter generating device is used for changing the experimental parameters of the simulation model for multiple times by using a simulation calculating unit in the processing module, so that the explosive charging water bath of the warhead cast explosive of the projectile body 71 is sequentially solidified, the target data of the cooled multiple groups of warhead grains of the projectile body 71 are obtained, the optimal target data in the target data of the cooled multiple groups of warhead grains of the projectile body 71 are selected, and the experimental parameters of the simulation model of the optimal target data are obtained after calculation and are used as adaptive parameters;
the adaptive parameter executing device comprises a heat-preservation water tank 11 and water bath guarantee equipment, wherein the water bath guarantee equipment is used for enabling the heat-preservation water tank 11 to be in the optimal cooling state of the optimal cooling target data;
the method mainly comprises the steps of optimizing precision forming process parameters by utilizing a simulation technology, obtaining better process routes and process parameters, designing manufacturing process equipment on the basis, and carrying out process verification to realize that the whole warhead charge of the projectile body is solidified layer by layer from bottom to top and from outside to inside like a U-shaped layer from the outside and the bottom, so that the probability of defects such as shrinkage cavity, shrinkage porosity and cracks in the middle and at the opening of a formed explosive column is reduced, the charge density of the fused explosive at the warhead is improved, the density difference is reduced, and the whole charge quality is improved.
The explosion-proof cold and hot integrated machine can rapidly heat and rapidly cool the temperature required by equipment, can control different temperatures of a plurality of surface paths, rapidly circulates around the product forming process, and greatly improves the production efficiency.
The MS9 steam-water separator is used for filtering and removing liquid drops carried in a steam and compressed air system more efficiently by adopting high-temperature nano filtering, a large amount of water-containing steam and compressed air enter the separator and move downwards in a vertical rotational flow centrifugal mode in a downward inclined mode, and as the densities of gas and liquid are different, if the gas and the liquid need to pass through the filtering together, generally speaking, the liquid is filtered on the filtering, and the gas can pass through. And because of neutrality, the gas will still move in the original direction. The liquid left on the filter can be shunted to the bottom of the separator to be condensed and discharged, thereby improving the gas quality and achieving the effect of saturated gas as high as 99.9%.
The experimental parameters of the simulation model are the water bath temperature and the water bath time of the water bath simulator 1.
The target data of the explosive columns of the warhead of the projectile body 71 comprise shrinkage cavity data of the explosive columns, shrinkage porosity data of the explosive columns and crack data of the explosive columns.
The water bath guarantee equipment comprises a water pipe 5, a hot air pipe 4, a steam-water separator 6, an explosion-proof cooling and heating integrated machine 3 and an explosion-proof air heater 2; the heat preservation water tank 11 is connected with the explosion-proof cold-hot integrated machine 3 through a water pipe 5; the explosion-proof air heater 2 is connected with the heat-preservation water tank 11 through a hot air pipe 4, and an air inlet of the steam-water separator 6 is connected with an air outlet of the heat-preservation water tank 11;
the explosion-proof cooling and heating integrated machine 3 is used for performing solidification water circulation with the heat preservation water tank 11, and the steam-water separator 6 is used for separating moisture contained in gas parts in the heat preservation water tank 11; the explosion-proof hot air blower 2 blows hot air to the heat preservation water tank 11 through the hot air pipe 4;
the parameter generation method for the solidification forming of the cast-in-shell explosive is based on the parameter adaptation system for the solidification forming of the cast-in-shell explosive in any one of claims 1 to 5, and the generation method for the solidification forming adaptation parameters of the cast-in-shell explosive executes the following steps:
s1: calling the warhead structural parameters and the explosive charge size parameters of the preset projectile body 71 in the storage module, and sending the warhead structural parameters and the explosive charge size parameters to the processing module as a first instruction;
s2: a simulation calculation unit in the processing module receives the first instruction and generates a CAD simulation structure model according to the first instruction;
s3: basic data are configured on the generated CAD simulation structure model, and multiple groups of cooling basic data are obtained after simulation processing;
s4: carrying out iteration and optimization operation on the multiple groups of cooling basic data to generate matched process parameters, and displaying the matched process parameters through a display module;
s6: and configuring the matched process parameters into an adaptive parameter execution device.
The basic data configuration specifically comprises configuration of material parameters, configuration of heat exchange coefficient of a contact interface and configuration of process conditions.
The preparation of the material parameters comprises the preparation of the components of the fusion-cast explosive material, and the components of the fusion-cast explosive material comprise trinitrotoluene, hexogen, aluminum powder and additives.
The configuration of the process conditions includes the boundary conditions of the movement of the projectile 7 into the water, the boundary conditions of the temperature of the projectile 7 into the water, the boundary conditions of the ambient temperature of the projectile 7 into the water and the boundary conditions of the temperature of the water bath.
The configuration of the heat exchange coefficient of the contact interface comprises an interface connection mode and a heat exchange coefficient which are connected with each other.
Example two
The embodiment is applied to a parameter adaptation system for solidification and molding of a cast-in-place projectile explosive in the first embodiment, as shown in fig. 1, the embodiment is a parameter generation method for solidification and molding of a cast-in-place projectile explosive, and a formula of the cast-in-place projectile explosive is determined as follows: DNAN is about 25-30%, RDX is about 30-40%, aluminum powder is about 25-35%, and other 2-5%, and simulation calculation is carried out on the basis of the formula.
(1) The invention is further described with reference to the following figures and detailed description. A simulation model as shown in fig. 3 is established according to the actual projectile body 7 structure, wherein the diameter D of the projectile body 7 part is 100mm, the length L is 500mm, the model is used for carrying out simulation calculation, a water bath method is adopted to realize sequential solidification from bottom to top, ProCAST software is adopted to simulate the fusion casting explosive loading process, and the flow field, the temperature field, the phase change and the like of the explosive in the explosive loading process are obtained. As shown in fig. 4, which is a graph of temperature distribution a and solid fraction B at different moments, the evolution of temperature distribution a and solid fraction distribution B inside explosive charges at three different moments from the beginning of casting to 1563s, 3073s and 4213s can be found out that the sequential solidification of explosive charges from bottom to top can be basically realized by utilizing the water bath sequential solidification, and as shown in fig. 5, the sequential solidification can effectively reduce shrinkage cavity and shrinkage porosity defects.
(2) Before the formal experiment begins, the watertight inspection is carried out on the heat preservation water tank 1 which is sequentially solidified and precisely formed, 500 liters of water is put into the heat preservation water tank 1, after the heat preservation water tank is kept still for 24 hours, the heat preservation water tank is qualified if no leakage exists, and the sequential solidification experiment can be carried out.
(3) Hot air is blown to the heat preservation water tank 1 through an air inlet, the temperature of the hot air at the inlet of the water tank is 95-98 ℃, the time is 10 minutes, and the hot air is temporarily closed.
(4) And (3) quickly putting the warhead with the loaded powder into the designated position of the heat-insulating water tank 1, fixing, pressing the sealing strip, and closing the water tank door.
(5) The explosion-proof hot air blower 2 is restarted, hot air is continuously put into the heat-preservation water tank 1 to delay solidification of the casting explosive on the upper part of the projectile body and in the riser, and the inlet temperature is controlled to be 95-98 ℃;
(6) when hot air is put into the heat-insulating water tank 1, solidification water is introduced through the explosion-proof cold-hot integrated machine 3 and the water inlet of the heat-insulating water tank 1 so as to control the solidification of the fusion-cast explosive at the lower part of the projectile body 7. Controlling the rising speed of the water surface to be 2 mm/min and the temperature of the solidified water to be 30-32 ℃ by controlling the flow rate of the introduced water within the time period of-20 minutes; controlling the rising speed of the water surface to be 4 mm/min and the temperature of the solidified water to be 30-32 ℃ by controlling the flow rate of the introduced water within 20-40 min; controlling the rising speed of the water surface to be 7 mm/min and the temperature of the solidified water to be 28-30 ℃ by controlling the flow rate of the introduced water within the period of 40-60 minutes; controlling the rising speed of the water surface to be 5 mm/min and the temperature of the solidified water to be 30-32 ℃ by controlling the flow rate of the introduced water within 60-80 minutes; controlling the rising speed of the water surface to be 2 mm/min and the temperature of the solidified water to be 33-35 ℃ by controlling the flow rate of the introduced water within 80-100 min; in the time period of 100-; and finishing the precision forming process of charging and solidifying the fusion-cast explosive at the warhead of the projectile body 7.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The parameter adaptation system for solidification molding of the projectile fusion cast explosive is characterized by comprising a process parameter generating device and an adaptation parameter executing device;
the process parameter generation device comprises: the device comprises a display module, a storage module and a processing module, wherein the processing module comprises a simulation calculation unit and a simulation model, and the simulation model comprises: a water bath simulator (1), a bullet simulator (7) and a bullet cap simulator (8); the warhead part of the projectile body simulator (7) is inserted into the water bath simulator (1), and the bullet cap simulator (8) is arranged at the top end of the projectile body simulator (7);
the process parameter generating device is used for changing the experimental parameters of the simulation model for multiple times by using a simulation calculating unit in the processing module, so that the explosive charging water bath of the molten explosive at the warhead of the projectile body (71) is sequentially solidified to obtain target data of a plurality of groups of cooled warhead grains of the projectile body (71), selecting the optimal target data in the target data of the plurality of groups of cooled warhead grains of the projectile body (71), and calculating to obtain the experimental parameters of the simulation model of the optimal target data and using the experimental parameters as adaptation parameters;
the adaptive parameter executing device comprises a heat-preservation water tank (11) and water bath guarantee equipment, wherein the water bath guarantee equipment is used for enabling the heat-preservation water tank (11) to be in the optimal cooling state of the optimal cooling target data.
2. The parameter adaptation system for solidification molding of projectile fusion cast explosive according to claim 1, wherein the experimental parameters of the simulation model are water bath temperature and water bath time of the water bath simulator (1).
3. The parametric adaptation system for solidification molding of projectile cast explosives in accordance with claim 1, wherein the target data of the projectile (71) warhead grains comprises shrinkage cavity data of grains, shrinkage porosity data of grains, and crack data of grains.
4. The parameter adapting system for solidification and molding of the projectile casting explosive according to claim 1, wherein the water bath guarantee equipment comprises a water pipe (5), a hot air pipe (4), a steam-water separator (6), an explosion-proof cooling and heating integrated machine (3) and an explosion-proof hot air blower (2); the heat-preservation water tank (11) is connected with the explosion-proof cold-hot integrated machine (3) through a water pipe (5); the explosion-proof air heater (2) is connected with the heat-preservation water tank (1) through a hot air pipe (4), and an air inlet of the steam-water separator (6) is connected with an air outlet of the heat-preservation water tank (11).
5. The parameter adapting system for solidification and forming of the projectile fusion cast explosive according to claim 4, wherein the explosion-proof cold-hot all-in-one machine (3) is used for carrying out solidification water circulation with the heat preservation water tank (11), and the steam-water separator (6) is used for separating moisture contained in gas parts in the heat preservation water tank (11); the explosion-proof air heater (2) blows hot air to the heat preservation water tank (11) through the hot air pipe (4).
6. The parameter generation method for the solidification forming of the projectile fusion cast explosive is characterized in that the parameter generation method for the solidification forming of the projectile fusion cast explosive is based on the parameter adaptation system for the solidification forming of the projectile fusion cast explosive in any one of claims 1 to 5, and the generation method for the solidification forming adaptation parameters of the fusion cast explosive executes the following steps:
s1: the method comprises the steps of calling the warhead structure parameters and the explosive charge size parameters of a preset projectile body (71) in a storage module, and sending the warhead structure parameters and the explosive charge size parameters to a processing module as a first instruction;
s2: a simulation calculation unit in the processing module receives the first instruction and generates a CAD simulation structure model according to the first instruction;
s3: basic data are configured on the generated CAD simulation structure model, and multiple groups of cooling basic data are obtained after simulation processing;
s4: carrying out iteration and optimization operation on the multiple groups of cooling basic data to generate matched process parameters, and displaying the matched process parameters through a display module;
s6: and configuring the matched process parameters into an adaptive parameter execution device.
7. The method for generating the parameters for solidification and molding of the projectile fusion cast explosive according to claim 6, wherein the configuration of the basic data specifically comprises configuration of material parameters, configuration of heat exchange coefficient of a contact interface and configuration of process conditions.
8. The method of claim 7, wherein the configuring of the material parameters comprises configuring components of a fused cast explosive material, and the components of the fused cast explosive material comprise trinitrotoluene, hexogen, aluminum powder and additives.
9. The method for generating parameters for solidification molding of projectile fusion cast explosive according to claim 8, wherein the configuration of process conditions comprises boundary conditions of movement of projectile (7) into water, boundary conditions of temperature of projectile (7) into water, boundary conditions of ambient temperature of projectile (7) into water and boundary conditions of temperature of water bath.
10. The method for generating parameters for solidification molding of projectile fusion cast explosives according to claim 9, wherein the configuration of the heat exchange coefficient of the contact interface comprises an interface connection mode and a heat exchange coefficient of the mutual connection.
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