Thermal probe charging nursing method
Through the combination of thermal probe charging care methods and shrinkage treatment tools, the charging defects caused by the coagulation process in the injection-based charging process are solved, and the charging quality and safety are improved.
Patent Information
- Application Number
- CN202411743736.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-30
- Publication Date
- 2025-02-11
AI Technical Summary
In the injection and charging process, defects such as crude crystals, pores, shrinkage pores and cracks caused by the solidification process of melt explosives affect the performance and safety of explosives.
Using thermal probe charging care method, the thermal probe is inserted along the axis of the product to lift and retain heat preservation, combined with a replenishment treatment tool such as copper brazing or wooden ruler, it is transferred to the solid that settles at the bottom of the loading funnel. Phase components to increase the solid phase content of the drug liquid and eliminate shrinkage joints or loosen charge defects.
It effectively solves the problems of shrinking joints and loosening loading defects during thermal probe charging care, avoids the safety and quality risks brought about by rework, and improves the loading density and quality.
Smart Images
Figure CN119413025A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of injection charging process, and in particular to a thermal probe charging care method. Background Art
[0002] As modern weapons and ammunition develop towards high-efficiency destruction, high battlefield survivability and high reliability, higher requirements are placed on the internal quality of the propellant. In particular, products that require penetration even require zero defects in the propellant.
[0003] The injection method is a charging process that uses the phase change transformation of molten explosives to complete the charging process. The injection method is widely used in the field of product charging due to its advantages such as simple production equipment, a wide range of filling materials and high charging density. However, based on the nature of the injection method itself, the solidification process of molten explosives is accompanied by changes in physical state, heat and volume. The solidification order of molten explosives is from the surface to the inside, and the volume will shrink during the solidification process, which is prone to defects such as coarse crystals, pores, shrinkage holes and cracks, affecting the performance of the explosives and the safety of use. According to the hot spot theory of explosive explosion, a warhead with charging defects will reduce the safety of use and affect the stability of the penetration process of the penetrating warhead.
[0004] In actual research and development and production, the method to improve the quality of charging is usually to control the solidification sequence through the thermal probe method. After the thermal probe completes the charging care, because its liquid medicine has not completely solidified, it is necessary to continue to wrap the upper and middle parts of the product and the charging funnel with a quilt for cooling. After cooling is completed, there are shrinkage seams or loose charging defects at the product charging port probe care position. In the early stage of introducing the thermal probe care method, when shrinkage seams or loose defects appear at the product charging port probe care position, measures such as extending the thermal probe care time and changing the thermal probe stay insulation position are often taken to seek solutions, but the results are minimal. In order to eliminate the above defects, remedial measures are taken in the process to allow rework by taking medicine or scalding medicine, but the above measures not only introduce new safety risks, but also lead to a decline in charging quality after rework.
[0005] Therefore, it is of great significance to develop a thermal probe charge care method. Summary of the invention
[0006] The purpose of the present invention is to provide a thermal probe charging care method to solve the problems existing in the prior art.
[0007] The technical solution adopted to achieve the purpose of the present invention is as follows: a thermal probe charging care method comprises the following steps:
[0008] 1) Preparation of explosives. Weigh the required components according to the formula, heat and melt the carrier explosive, and add the high-energy solid phase component to mix to form a melt-cast explosive.
[0009] 2) Explosive pouring: A charging funnel is arranged at the charging port of the projectile to inject the molten cast explosive into the projectile.
[0010] 3) Solidification care: Insert the thermal probe from the charging port along the product axis into the lower middle part of the chamber to lift and keep warm.
[0011] 4) Eliminate defects. When the heat preservation is completed, lift the thermal probe out of the charging funnel. Insert the shrinkage treatment tool into the charging funnel, and move the solid phase components settled at the bottom of the charging funnel to the original heat probe retention and heat preservation position to increase the solid phase content of the liquid at that location.
[0012] 5) Wrap the upper middle part of the projectile and the charging funnel with a quilt and cool naturally to room temperature. The molten explosive in the projectile solidifies into a charge column.
[0013] Furthermore, before step 1), there is also a step of determining the defect-prone locations and defect formation mechanisms by establishing a layer-by-layer sequential solidification model.
[0014] Furthermore, the model is a physical model. After the projectile is cooled to room temperature, the charging funnel is removed to clean the charge surface at the charge port, and the product is sent to CT for sectioning and flaw detection.
[0015] Furthermore, the model is a simulation model, and the solidification process of the molten explosive is simulated and calculated using Fluent software.
[0016] Furthermore, in step 3), the probe is lifted at a speed of 25 mm / 5 to 30 mm / 5 minutes. When the bottom of the probe is lifted to the product charging port, it enters the dwelling and heat preservation stage, and the heat preservation time is 3 to 8 hours.
[0017] Furthermore, in step 4), the shrinkage feeding tool is a copper brazing tool.
[0018] Furthermore, in step 1), the explosive further comprises a mechanical aid component. In step 4), the shrinkage feeding tool is a wooden ruler.
[0019] Furthermore, after step 5), there is also a step of testing the quality of the charge, testing the density and internal defects of the charge to ensure that the charge quality meets the requirements.
[0020] Furthermore, X-ray, ultrasound, industrial CT and acoustic emission methods are used to inspect the quality of the charge.
[0021] The technical effect of the present invention is unquestionable: the defects formed at the position of the thermal probe at the charging port are solved during the charging care process. Targeted treatment measures are taken to solve the charging quality problems of the product during the thermal probe care process in view of the formation mechanism of shrinkage cracks and loose charging defects during the thermal probe charging care process, thereby solving the charging quality problems of the product during the thermal probe care process. The problem of rework of thermal probe charging care products due to charging defects is avoided, and the safety and product quality degradation problems caused by rework are eliminated. In the process of solving the shrinkage cracks and loose charging defects during the thermal probe charging care process, a way to increase the charging density of the product is found by using a copper solder or a wooden ruler to dial in the solid phase components settled at the bottom of the charging funnel. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 Flow chart of the nursing method for charging the thermal probe;
[0023] Figure 2 This is a schematic diagram of charge defects; Figure 2 a is the shrinkage joint, Figure 2 b is loose.
[0024] Figure 3 This is a schematic diagram of copper soldering;
[0025] Figure 4 It is a schematic diagram of a wooden ruler; Figure 4 a and Figure 4 b shows different views of the wooden ruler.
[0026] In the picture: copper chisel 1, wooden ruler 2. DETAILED DESCRIPTION
[0027] The present invention is further described below in conjunction with the embodiments, but it should not be understood that the above subject matter of the present invention is limited to the following embodiments. Without departing from the above technical ideas of the present invention, various substitutions and changes are made according to the common technical knowledge and customary means in the art, which should all be included in the protection scope of the present invention.
[0028] Embodiment 1:
[0029] See also Figure 1 This embodiment provides a thermal probe charge care method, comprising the following steps:
[0030] 1) Determine the defect-prone locations and defect formation mechanisms by establishing a layer-by-layer sequential solidification model.
[0031] 2) Preparation of explosives. Weigh the required components according to the formula, heat and melt the carrier explosive, and add the high-energy solid phase components to form a melt-cast explosive.
[0032] 3) Explosive pouring: A charging funnel is arranged at the charging port of the projectile to inject the molten cast explosive into the projectile.
[0033] 4) Solidification care: Insert the thermal probe from the charging port along the product axis into the lower middle part of the chamber to lift and hold for heat preservation.
[0034] 5) Eliminate defects. When the heat preservation is completed, lift the thermal probe out of the charging funnel. Insert the shrinkage treatment tool into the charging funnel, and move the solid phase components settled at the bottom of the charging funnel to the original heat probe retention and heat preservation position to increase the solid phase content of the liquid at that location.
[0035] 6) Wrap the upper middle part of the projectile and the charging funnel with a quilt and cool naturally to room temperature. The molten explosive in the projectile solidifies into a charge column.
[0036] 7) Charge quality inspection: Inspect charge density and internal defects to ensure that charge quality meets requirements.
[0037] Embodiment 2:
[0038] The main contents of this embodiment are the same as those of Embodiment 1, wherein this embodiment analyzes the thermal probe charging care process to find out the formation mechanism of defects at the charging port probe care position of the product.
[0039] The model is a physical model. After the projectile cools to room temperature, remove the charging funnel to clean the charge surface at the charge port, and send the product to CT for sectioning. Figure 2 During the flaw detection, it was found that there were shrinkage cracks or loose charge defects at the position where the probe stayed at the charging port of the product. After checking and analyzing the shrinkage cracks and loose charge defects, it was found that the main charge formula that formed the shrinkage crack charge defect only contained two components, liquid and solid phases, while the main charge formula that formed the loose charge defect contained not only liquid and solid phase components, but also mechanical additives such as cellulose. After analysis, it was found that the main factors for the formation of the two charge defects were that when the probe stayed at the insulation, the liquid medicine around the probe was in a molten state for a long time, and the solid phase components contained in it continued to settle. When the probe was lifted out of the funnel and entered the quilt for insulation, the liquid medicine at this place had excessive sedimentation of solid phase components and its content was far lower than the normal value. The liquid medicine with insufficient solid phase content shrank too much during the solidification process, forming shrinkage cracks or loose charge defects.
[0040] Embodiment 3:
[0041] The main contents of this embodiment are the same as those of embodiment 1, wherein the model is a simulation model, and the solidification process of the molten explosive is simulated and calculated using Fluent software.
[0042] Embodiment 4:
[0043] The main contents of this embodiment are the same as any one of embodiments 1 to 3, wherein in step 4), the probe is lifted at a speed of 25 mm / 5 to 30 mm / 5 minutes, and when the bottom of the probe is lifted to the product charging port, it enters the stay and heat preservation stage, and the heat preservation time is 3 to 8 hours.
[0044] Embodiment 5:
[0045] The main content of this embodiment is the same as any one of the embodiments 1 to 4, wherein the shrinkage treatment tool is a copper brazing rod 1 to eliminate the shrinkage defects formed after the liquid solidifies. Figure 3 As shown in the figure, the solid phase components of the main charge without mechanical additives such as cellulose will settle quickly during the hot probe care process, and a φ8 copper brazing rod can be used to insert the solid phase components.
[0046] Embodiment 6:
[0047] The main contents of this embodiment are the same as any one of the embodiments 1 to 4, wherein the explosive further comprises a mechanical additive component. The shrinkage treatment tool is a wooden ruler 2 to eliminate the loose defects formed after the liquid medicine solidifies. The solid phase components of the main charge containing mechanical additives such as cellulose settle slowly during the hot probe care process. When dialing in the solid phase components, a wooden ruler is required to ensure the dialing amount of the solid phase components.
[0048] Embodiment 7:
[0049] The main contents of this embodiment are the same as any one of Embodiments 1 to 6, wherein X-ray, ultrasound, industrial CT and acoustic emission are used to inspect the charge quality.
Claims
1. A thermal probe charging care method, characterized in that: The following steps are involved: 1) Preparation of explosives: weighing the required components according to the formula, heating and melting the carrier explosive, and adding the high-energy solid phase components to mix to form a melt-cast explosive; 2) Explosive pouring: a charging funnel is arranged at the charging port of the projectile to inject the molten cast explosive into the projectile; 3) Solidification care: insert the thermal probe from the charging port along the product axis into the middle and lower part of the chamber to lift and keep warm; 4) Eliminate defects; When the heat preservation is finished, the thermal probe is taken out of the charging funnel; the shrinkage treatment tool is inserted into the charging funnel, and the solid phase components settled at the bottom of the charging funnel are transferred to the original heat probe retention and heat preservation position to increase the solid phase content of the liquid at that location; 5) Wrap the upper middle part of the projectile and the charging funnel with a quilt and cool naturally to room temperature. The molten explosive in the projectile solidifies into a charge column.
2. A thermal probe charge care method according to claim 1, characterized in that: Prior to step 1), there is also a step of determining the defect-prone locations and defect formation mechanisms by establishing a layer-by-layer sequential solidification model.
3. A thermal probe charging care method according to claim 2, characterized in that: The model is a physical model; after the projectile is cooled to room temperature, the charging funnel is removed to clean the charge surface at the charging port, and the product is sent to CT for sectioning and flaw detection.
4. A thermal probe charge care method according to claim 2, characterized in that: The model is a simulation model; Fluent software is used to simulate and calculate the solidification process of molten explosive.
5. A thermal probe charging care method according to claim 1, characterized in that: In step 3), the probe is lifted at a speed of 25 mm / 5 to 30 mm / 5 minutes. When the bottom of the probe is lifted to the product charging port, it enters the dwelling and heat preservation stage, and the heat preservation time is 3 to 8 hours.
6. A thermal probe charge care method according to claim 1, characterized in that: In step 4), the shrinkage feeding tool is a copper brazing solder (1).
7. A thermal probe charging care method according to claim 1, characterized in that: In step 1), the explosive further comprises a mechanical auxiliary component; in step 4), the shrinkage feeding treatment tool is a wooden ruler (2).
8. A thermal probe charge care method according to claim 1, characterized in that: After step 5), there is also a step of testing the quality of the charge; testing the charge density and internal defects to ensure that the charge quality meets the requirements.
9. A thermal probe charge care method according to claim 8, characterized in that: X-ray, ultrasound, industrial CT and acoustic emission are used to inspect charge quality.