Manufacturing method and system of conformal micro-runner thin-wall storage tank

Abstract

The invention provides a method and system for manufacturing a shape follow-up thin-wall storage tank with a micro flow channel, and the method comprises the steps: constructing a shape follow-up thin-wall storage tank body model, and recording the model as a first model; carrying out adaptive processing on the first model to obtain an intermediate three-dimensional model; performing simulation calculation on the middle three-dimensional model to obtain a middle reverse compensation model, judging whether the middle reverse compensation model meets a part deformation deviation allowable range or not, and if yes, obtaining a conformal micro-runner thin-wall storage tank reverse compensation model, and recording the conformal micro-runner thin-wall storage tank reverse compensation model as a second model; if not, the reverse compensation coefficient is reset, and then simulation calculation is conducted again till the allowable range of the deformation deviation of the part is met; sectioning the second model to obtain a selective laser melting sectioning file; and the subdivision file is adopted for selective laser melting forming, and the target shape follow-up micro-runner thin-wall bearing storage box is obtained. The production period can be effectively shortened through a selective laser melting (LPBF) forming mode, the strength of the storage box is guaranteed, meanwhile, the weight of the storage box is reduced, and the manufacturing cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of additive manufacturing, and particularly to a manufacturing method and system for a conformal micro-channel thin-wall storage tank. Background Art

[0002] Based on the conventional manufacturing technology of propulsion systems, using traditional machining and welding methods, the propulsion system is a decentralized configuration. Single machines within the system are connected by pipelines to achieve the supply of working media. Therefore, there are problems such as complex structure, heavy weight, low research and development efficiency, and high manufacturing cost. It is urgent to borrow additive manufacturing technology for lightweight and modular design to improve the rapid response manufacturing ability. The storage tank is an important component of the satellite propulsion system. The pipeline connection scheme of the storage tank in the conventional space propulsion system is complex and occupies a large space, making it difficult to meet the requirements of lightweight integration of small satellites.

[0003] Metal additive manufacturing is a manufacturing method that forms three-dimensional complex structure parts by gradually adding materials, which can achieve integrated manufacturing, shorten the research and development cycle, and realize rapid design iteration and optimization, etc. However, the application of additive manufacturing technology in the storage tanks of domestic space propulsion systems is still in its infancy. Different positions in the internal flow channel will show different defect forms during the forming process: powder adhesion and slag hanging will occur on the overhanging surface of the micro-channel inner hole, reducing the forming quality of the overhanging surface; powder adhesion, cracking, and flatness reduction will occur on the bottom surface and side surface of the internal flow channel due to warping, melt pool convection behavior, melt channel lapping behavior, etc., thus seriously affecting the forming quality of the inner surface. During the additive manufacturing process of the conformal fine-channel thin-wall pressure-resistant structure, multiple thermal cycles cause a large amount of non-uniformly distributed residual stress to be generated inside the structure, thereby affecting the dimensional accuracy of the component.

[0004] It is necessary to carry out research on the technology of storage tanks for components of space propulsion systems based on additive manufacturing to solve the bottleneck problems of additive manufacturing technology on the deformation of storage tank components for space propulsion systems and the low internal quality of micro-channels, reducing the working performance, and realize the application of additive manufacturing storage tanks with fine channels inside in the field of space propulsion.

[0005] Patent document CN118218971A discloses a storage tank based on additive manufacturing, as well as a manufacturing method and application. This method includes: prefabricating the tank cover, tank bottom, and tank barrel of the rocket engine storage tank; welding the tank cover, tank bottom, and tank barrel to obtain an initial storage tank; performing additive manufacturing on each weld area of the initial storage tank to obtain the final storage tank. However, the storage tank in this patent document is a large storage tank for launch vehicles (diameter dimension > 2m), which is very different from the size and application scenario of the present application. Moreover, the storage tank mentioned in this patent document is a prefabricated simple solid shell, and no pipeline channels can be designed and formed inside the shell. Summary of the Invention

[0006] Aiming at the defects in the prior art, the object of the present invention is to provide a manufacturing method and system for a conformal micro-channel thin-walled storage tank.

[0007] A manufacturing method for a conformal micro-channel thin-walled storage tank provided by the present invention includes: Step S1: Construct a conformal micro-channel thin-walled storage tank body model, denoted as the first model; the first model includes a thin-walled shell 1, a conformal micro-channel 2, each pipeline interface 3, a flow channel inlet and outlet 4, and a process support 5; Step S2: Perform adaptive processing on the first model to obtain an intermediate three-dimensional model; the adaptive processing includes adding a 1-mm machining allowance only to the substrate contact surface and the high-precision machining surface, chamfering all sharp edges of the conformal micro-channel thin-walled bearing storage tank, and adding a process support to the area where the included angle between the arc top surface and the horizontal plane of the conformal micro-channel thin-walled bearing storage tank is less than 45°; Step S3: Perform simulation calculation on the intermediate three-dimensional model to obtain an intermediate anti-compensation model, including importing the intermediate three-dimensional model into simulation software for simulation calculation, setting printing conditions and simulation parameters, and determining whether the intermediate anti-compensation model meets the allowable range of part deformation deviation. If so, obtain a conformal micro-channel thin-walled storage tank anti-compensation model, denoted as the second model; if not, reset the anti-compensation coefficient and perform simulation calculation again until the allowable range of part deformation deviation is met; Step S4: Perform meshing on the parts corresponding to the second model and the process support with different process parameters to obtain a laser selective melting cutting file; Step S5: Use the cutting file for laser selective melting forming to obtain a target conformal micro-channel thin-walled bearing storage tank.

[0008] Preferably, the wall thickness of the thin-walled shell is not greater than 2 mm, and the diameter d of the conformal micro-channel is ≤ 1 mm; All conformal micro-channels have no corners or closed loops, all flow channel inlets and outlets are processed into flared counterbores, and there are no storage tank flow channel pipelines in the internal and external spaces of the storage tank except for the conformal micro-channel storage tank shell itself.

[0009] Preferably, the process support is a solid support, a block support, and a conical support; The block support is in the shape of a sheet, with a thickness of 60 - 100 μm, a spacing of 0.1 - 0.2 mm, and no support offset; The conical support is in the shape of a cylinder, with a radius of 0.1 - 0.8 mm, a spacing of 0.3 - 0.5 mm, and no support offset.

[0010] Preferably, the simulation parameters include: substrate size and thickness, placement positions of parts and process supports, powder material grade and printing parameters, allowable range of part deformation deviation, mesh division type and mesh division size parameters, anti-compensation coefficient and allowable maximum number of anti-compensation steps.

[0011] Preferably, the step S3 includes: Confirm the substrate size and thickness according to the shape of the intermediate model, and confirm the placement positions of parts and process supports; Set the powder material grade and printing parameters, allowable range of part deformation deviation, anti-compensation coefficient and allowable maximum number of anti-compensation steps; the anti-compensation coefficient is -1.5 to 1.5; According to the size parameters of the storage tank, select the mesh division type and set the mesh division size parameters.

[0012] Preferably, the step S5 includes: Step S5.1: Import the meshed file into the selective laser melting forming equipment, and perform selective laser melting forming in an argon environment to obtain a conformal micro-channel thin-walled load-bearing storage tank with a substrate; Step S5.2: Perform steps including part powder cleaning, heat treatment, substrate separation, and channel finishing on the conformal micro-channel thin-walled load-bearing storage tank with a substrate to obtain the final target conformal micro-channel thin-walled load-bearing storage tank.

[0013] Preferably, the part powder cleaning includes using compressed air, the diameter of the air gun nozzle is ≤1 mm, the nozzle is pulsed in sequence according to the flow channel sequence and aligned with the horn-shaped sink holes of each flow channel to remove the powder inside the micro-channel, and the cleaning time t ≤ 10 min; The heat treatment includes performing vacuum annealing treatment on the conformal micro-channel thin-walled load-bearing storage tank with a substrate; The substrate separation includes separating the conformal micro-channel thin-walled load-bearing storage tank from the substrate by using a reciprocating wire electrical discharge machining method; The channel finishing includes finishing all the micro-channels by combining chemical polishing and abrasive flow polishing.

[0014] Preferably, the heat treatment process parameters are a vacuum degree ≤ 6.7×10-2 Pa, heating to 800 - 900 °C at a rate not greater than 20 °C / min, holding for 3 - 4 h, and then cooling with the furnace; The substrate separation parameters include an electrical discharge pulse width of 10 - 32 μs, a pulse interval of 110 - 175 μs, and a waveform of rectangular pulse; In the method combining chemical polishing and abrasive flow polishing, the polishing liquid is a mixed solution of abrasives, nitric acid, and hydrofluoric acid. The mixed solution is at a temperature of 50 - 60°C, the solution flows under a pressure of 0.3 - 0.4 Mpa, the temperature of the mixed solution is 30 - 50°C, and the polishing time is 10 - 15 minutes.

[0015] Compared with the prior art, the present invention has the following beneficial effects: Based on the integrated design concept of selective laser melting, the present invention combines the thin wall of the storage tank with the internal and external flow channels of the storage tank, breaking through the influence of the deformation problem caused by the double influence of the thin wall and the flow channel on the dimensional accuracy of the storage tank. It can directly fabricate a conformal micro-channel thin-wall bearing storage tank that is integrated, internally dense, has high dimensional accuracy, and a small flow channel roughness. While meeting the usage function of the storage tank, it reduces the complexity of the internal structure of the space propulsion system, reduces the weight of the storage tank, increases the capacity of the storage tank, can significantly improve the sustainable service life of satellites in space, and reduces the manufacturing cost.

[0016] All kinds of pipelines of the storage tank described in the present invention are integrated with the storage tank body, that is, all the flow channels are internal flow channels conformal to the box body. The thinnest flow channel wall thickness is only 0.5 mm, and the maximum flow channel diameter is 1 mm, solving the problem of complex external flow channel pipelines and various miscellaneous parts of the storage tank in the propulsion system. Description of the Drawings

[0017] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, objectives, and advantages of the present invention will become more obvious: Figure 1 Schematic diagram of the outer surface structure of the conformal micro-channel thin-wall bearing storage tank of the present invention; Figure 2 Schematic diagram of the flow channel structure of the conformal micro-channel thin-wall bearing storage tank of the present invention; Figure 3 Top view schematic diagram of the flow channel structure of the conformal micro-channel thin-wall bearing storage tank of the present invention; Figure 4 Schematic diagram of the simulation deformation of the conformal micro-channel thin-wall bearing storage tank of the present invention; Figure 5 Schematic diagram of the simulation deformation of the model after anti-compensation of the conformal micro-channel thin-wall bearing storage tank of the present invention; Explanation of the reference numerals in the drawings: 1 - Thin-wall shell; 2 - Conformal micro-channel; 3 - Each pipeline interface; 4 - Flow channel inlet and outlet; 5 - Process support. Detailed implementation manners

[0018] The present invention will be described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several changes and improvements can still be made. These all belong to the protection scope of the present invention.

[0019] The present invention provides a selective laser melting (LPBF) forming method for a conformal micro-channel thin-wall bearing storage tank. By means of selective laser melting (LPBF) forming, the production cycle can be effectively shortened, while ensuring the strength of the storage tank, reducing the weight of the storage tank, and lowering the manufacturing cost.

[0020] Embodiment 1 A manufacturing method for a conformal micro-channel thin-wall storage tank according to the present invention includes: Step S1: Construct a conformal micro-channel thin-wall storage tank body model, denoted as the first model. As Figures 1 to 3 shown, the first model includes a thin-wall shell 1, conformal micro-channels 2, various pipeline interfaces 3, flow channel inlets and outlets 4, and process supports 5. The wall thickness of the thin-wall shell is not greater than 2 mm, the diameter d of the conformal micro-channels is ≤ 1 mm, all conformal micro-channels have no corners or closed loops, all flow channel inlets and outlets are processed into flared counterbores, and there are no storage tank flow channel pipelines in the internal and external spaces of the storage tank except for the conformal micro-channel storage tank shell itself. Preferably, the material grade of the conformal micro-channel thin-wall bearing storage tank is TC4 titanium alloy, and the equipment selected is Zhongrui Technology iSLM420D. The above steps can be processed using software such as UG, proe, or creo.

[0021] Step S2: Perform adaptive processing on the first model to obtain an intermediate three-dimensional model. The adaptive processing includes adding a 1-mm machining allowance only to the substrate contact surface and high-precision machining surfaces, chamfering all sharp edges of the conformal micro-channel thin-wall bearing storage tank, and adding process supports to the area where the included angle between the arc top surface and the horizontal plane of the conformal micro-channel thin-wall bearing storage tank is less than 45°. Among them, adding process supports can be processed using magics software. The process supports are solid supports, block supports, and conical supports. The block support is in the shape of a sheet, with a thickness of 60 - 100 μm, a spacing of 0.1 - 0.2 mm, and no support offset. The conical support is cylindrical, with a radius of 0.1 - 0.8 mm, a spacing of 0.3 - 0.5 mm, and no support offset.

[0022] Step S3: As Figure 4 and Figure 5As shown, the intermediate three-dimensional model is simulated and calculated to obtain an intermediate anti-compensation model, and it is judged whether the intermediate anti-compensation model meets the allowable range of part deformation deviation. If so, the anti-compensation model of the conformal micro-channel thin-walled storage tank is obtained, denoted as the second model; if not, the anti-compensation coefficient is reset and then simulated and calculated again until the allowable range of part deformation deviation is met. The step S3 includes importing the intermediate three-dimensional model into the simulation software for simulation calculation, setting the printing conditions and simulation parameters, and the simulation software includes simufact simulation software. Specifically, the size and thickness of the substrate are confirmed according to the shape of the intermediate model, and the placement positions of the part and the process support are confirmed; the powder material grade, printing parameters, allowable range of part deformation deviation, anti-compensation coefficient and allowable maximum number of anti-compensation steps are set, where the anti-compensation coefficient is -1.5 to 1.5, and the anti-compensation coefficient is set according to the actual compensation result, combined with various factors such as the structure and wall thickness of the product. According to the size parameters of the storage tank, the mesh division type is selected, and the mesh division size parameters are set. Among them, the mesh division type is volume mesh division and surface mesh division. The powder material grade and the substrate material are preferably TC4. For example, according to the shape of the intermediate model, the size of the substrate is confirmed to be 300×300×420mm, the thickness is 50mm, and the placement positions of the part and the process support are confirmed. The allowable range of part deformation deviation is set to not more than ±0.1mm, the anti-compensation coefficient is set to -0.85 to -0.9, and the allowable maximum number of anti-compensation steps is set to 10. According to the size parameters of the storage tank, the volume mesh division type is selected, and the mesh division size parameters are set to 0.5 to 1mm. Further, the allowable range of part deformation deviation is based on the dimensional requirements of the product performance. For example, the outer surface of the storage tank shell is not machined, and the dimensional accuracy is required to reach ±0.1mm. If the current intermediate anti-compensation model meets the allowable range of part deformation deviation of ±0.1mm, the anti-compensation model of the conformal micro-channel thin-walled storage tank is obtained, denoted as the second model; if not, the anti-compensation coefficient is reset according to experience, and the coefficients used for different materials and different structures are different. Then, a simulation calculation is performed again to obtain an anti-compensation model that meets the set value of the allowable range of part deformation deviation of ±0.1mm, and this model is the model for printing on the machine.

[0023] When setting the anti-compensation conditions, first, the allowable deformation size requirements of the product size are input, such as inputting not more than ±0.1mm; the anti-compensation coefficient is also set, such as -1.0; then the simulation calculation is started, including the following steps: Step 1: Perform a deformation simulation on the initial model, that is, the first model forming, to predict the deformation trend.

[0024] Step 2: Perform reverse compensation for the deformation of the initial model. For example, if a certain part bulges 0.5mm, it will be recessed 0.5mm in the opposite direction at this part to obtain a process model.

[0025] Step 3: Perform deformation simulation on the process model, predict the deformation trend, and obtain the intermediate anti-compensation model. If the deformation size is within ±0.1mm, the anti-compensation model, i.e., the second model, is obtained; if it exceeds ±0.1mm, reset the anti-compensation coefficient, and iterate the calculation until the deformation size meets the condition of not more than ±0.1mm.

[0026] Whether the intermediate anti-compensation model meets the allowable range of part deformation deviation is determined by the best fit between the intermediate anti-compensation model and the initial model in the software, and which parts are convex or concave, and the convex and concave values ​​are as follows: Figure 4 As shown, within ±0.5mm, beyond ±0.1mm, it is not satisfied, so anti-compensation calculation is required, such as Figure 5 As shown, the anti-compensation model is obtained and the deformation is within the range of ±0.1mm.

[0027] Step S4: Slice the second model to obtain a laser selective melting slice file. Different process parameters are used to slice the parts and process support corresponding parts of the second model.

[0028] The process parameters used for the corresponding part of the part are: scanning type is linear filling, scanning spacing is 0.115mm, rotation angle is 67°, powder layer thickness is 0.04mm; laser power is 180~230W, scanning speed is 1000~1300mm / s, and spot compensation is 0.02~0.08mm.

[0029] The process parameters used for the corresponding part of the process support are: the scanning type is linear filling, the scanning spacing is 0.115mm, the rotation angle is 67°, the powder layer thickness is 0.04mm; the laser power is 170~200W, and the scanning speed is 1500~2000mm / s.

[0030] Step S5: Use the sliced file for selective laser melting forming to obtain the target conformal micro-channel thin-walled load-bearing tank. The step S5 includes importing the sliced file into a selective laser melting forming device, performing selective laser melting forming in an argon environment to obtain a conformal micro-channel thin-walled load-bearing tank with a substrate, and then performing steps including part powder cleaning, heat treatment, substrate separation, and channel finishing on the conformal micro-channel thin-walled load-bearing tank with the substrate. The part powder cleaning includes using compressed air at 0.3 Mpa, with the diameter of the air gun nozzle ≤ 1 mm. The nozzle is pulsed in sequence according to the flow order of the channels and aligned with the trumpet-shaped counterbores of each channel to remove the powder inside the micro-channels. The cleaning time t ≤ 10 min. The heat treatment includes performing vacuum annealing treatment on the conformal micro-channel thin-walled load-bearing tank with the substrate. The heat treatment process parameters are a vacuum degree ≤ 6.7×10-2 Pa, heating to 800 - 900 °C at a rate not greater than 20 °C / min, holding for 3 - 4 h, and then cooling in the furnace. The substrate separation includes separating the conformal micro-channel thin-walled load-bearing tank from the substrate by using a reciprocating wire electrical discharge machining method. The pulse width of the electrical discharge is 10 - 32 μs, the pulse interval is 110 - 175 μs, and the waveform is a rectangular pulse. Manually and mechanically remove the process support, block the channels of the conformal micro-channel thin-walled load-bearing tank, and perform sandblasting on the product blank to obtain the target conformal micro-channel thin-walled load-bearing tank. The sandblasting treatment can reduce the surface roughness of the tank body. There will be residues at the roots of the process supports used in additive manufacturing on the part surface, which can also be removed by sandblasting. In addition, it makes the color of the outer surface consistent and tends to a metallic luster. The channel finishing includes using a combination of chemical polishing and abrasive flow polishing to finish all the micro-channels. The polishing solution is a mixed solution of abrasive grains, nitric acid, and hydrofluoric acid. The mixed solution is at 50 - 60 °C, the solution flows at 0.3 - 0.4 Mpa, the temperature of the mixed solution is 30 - 50 °C, and the polishing time is 10 - 15 min.

[0031] The purpose of the present invention is to provide a method for forming a conformal micro-channel thin-walled load-bearing tank by selective laser melting (LPBF), which combines the thin walls of the tank with the internal and external channels of the tank, and uses the selective laser melting (LPBF) forming method to realize the forming of a satellite propulsion conformal micro-channel thin-walled load-bearing tank with high quality, high efficiency, controllable deformation, dense structure, and fine internal channels. By using additive manufacturing for integrated forming, while effectively shortening the production cycle and reducing the manufacturing cost, it meets the use function of the tank, reduces the complexity of the internal structure of the tank, reduces the weight of the tank, and increases the capacity of the tank.

[0032] Those skilled in the art know that in addition to implementing the system and its various devices, modules, and units provided by the present invention in the form of pure computer-readable program code, the method steps can be logically programmed to enable the system and its various devices, modules, and units provided by the present invention to be implemented in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, embedded microcontrollers, etc. to achieve the same functions. Therefore, the system and its various devices, modules, and units provided by the present invention can be considered as a hardware component, and the devices, modules, and units included therein for implementing various functions can also be regarded as the structures within the hardware component; the devices, modules, and units for implementing various functions can also be regarded as either software modules for implementing the method or structures within the hardware component.

[0033] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Without conflict, the embodiments of the present application and the features in the embodiments can be combined arbitrarily with each other.

Claims

1. A manufacturing method of a thin-walled storage tank with a conformal micro-channel, characterized in that, Including: Step S1: Construct a conformal micro-channel thin-wall storage tank body model, denoted as the first model; the first model includes a thin-wall shell (1), a conformal micro-channel (2), each pipeline interface (3), a flow channel inlet and outlet (4), and a process support (5); Step S2: Perform adaptive processing on the first model to obtain an intermediate 3D model; the adaptive processing includes adding a 1mm machining allowance only to the substrate contact surface and high-precision machining surfaces, chamfering all sharp edges of the conformal micro-channel thin-wall bearing storage tank, and adding process supports to the area where the included angle between the arc top surface and the horizontal plane of the conformal micro-channel thin-wall bearing storage tank is less than 45°; Step S3: Perform simulation calculation on the intermediate 3D model to obtain an intermediate anti-compensation model, including importing the intermediate 3D model into simulation software for simulation calculation, setting printing conditions and simulation parameters, and determining whether the intermediate anti-compensation model meets the allowable range of part deformation deviation. If so, obtain the anti-compensation model of the conformal micro-channel thin-wall storage tank, denoted as the second model; if not, reset the anti-compensation coefficient and perform simulation calculation again until the allowable range of part deformation deviation is met; Step S4: Discretize the corresponding parts of the parts and process supports of the second model using different process parameters to obtain a laser powder bed fusion discretization file; Step S5: Use the discretization file to perform laser powder bed fusion forming to obtain the target conformal micro-channel thin-wall bearing storage tank.

2. The manufacturing method of the conformal micro-channel thin-walled storage tank according to claim 1, characterized in that, The wall thickness of the thin-wall shell is not greater than 2mm, and the diameter d of the conformal micro-channel ≤ 1mm; All conformal micro-channels have no corners or closed loops, all flow channel inlets and outlets are processed into flared counterbores, and there are no storage tank flow channels inside and outside the storage tank except for the storage tank shell itself of the conformal micro-channel; 3. The manufacturing method of the conformal microchannel thin-walled storage tank according to claim 1, characterized in that, The process support is a solid support, a block support, and a conical support; The block support is in the shape of a sheet, with a thickness of 60 - 100μm, a spacing of 0.1 - 0.2mm, and no support offset; The conical support is cylindrical, with a radius of 0.1 - 0.8mm, a spacing of 0.3 - 0.5mm, and no support offset.

4. The manufacturing method of the conformal micro-channel thin-walled storage tank according to claim 1, characterized in that, The simulation parameters include: substrate size and thickness, placement positions of parts and process supports, powder material grade and printing parameters, allowable range of part deformation deviation, mesh division type and mesh size parameters, anti-compensation coefficient, and allowable maximum number of anti-compensation steps.

5. The manufacturing method of the conformal micro-channel thin-walled storage tank according to claim 1, characterized in that, The step S3 includes: Confirm the substrate size and thickness according to the shape of the intermediate model, and confirm the placement positions of parts and process supports; Set the powder material grade and printing parameters, allowable range of part deformation deviation, anti-compensation coefficient, and allowable maximum number of anti-compensation steps; the anti-compensation coefficient is -1.5 to 1.5; Select the mesh division type according to the storage tank size parameters and set the mesh size parameters.

6. The manufacturing method of the conformal microchannel thin-walled storage tank according to claim 1, characterized in that, The step S5 includes: Step S5.1: Import the discretization file into a laser powder bed fusion forming device, and perform laser powder bed fusion forming in an argon environment to obtain a conformal micro-channel thin-wall bearing storage tank with a substrate; Step S5.2: Perform steps including part powder cleaning, heat treatment, substrate separation, and runner finishing on the conformal micro-channel thin-wall bearing storage tank with the substrate to obtain the final target conformal micro-channel thin-wall bearing storage tank.

7. The manufacturing method of the conformal micro-channel thin-walled storage tank according to claim 6, wherein The part powder cleaning includes using compressed air with the diameter of the air gun nozzle ≤ 1 mm. The nozzle is pulsed in sequence according to the flow path of the runner and aligned with the trumpet-shaped counterbores of each runner to remove the powder inside the micro-channel. The cleaning time t ≤ 10 min. The heat treatment includes performing vacuum annealing treatment on the conformal micro-channel thin-wall bearing storage tank with the substrate. The substrate separation includes separating the conformal micro-channel thin-wall bearing storage tank from the substrate by using reciprocating wire electrical discharge machining. The runner finishing includes finishing all the micro-channels by combining chemical polishing and abrasive flow polishing.

8. The manufacturing method of the conformal microchannel thin-walled storage tank according to claim 7, characterized in that, The heat treatment process parameters are a vacuum degree ≤ 6.7×10-2 Pa, heating to 800 - 900 °C at a rate not greater than 20 °C / min, holding for 3 - 4 h, and then cooling in the furnace. The parameters for the substrate separation include an electrical discharge pulse width of 10 - 32 μs, a pulse interval of 110 - 175 μs, and a rectangular pulse waveform. In the method of combining chemical polishing and abrasive flow polishing, the polishing liquid is a mixed solution of abrasive grains, nitric acid, and hydrofluoric acid. The mixed solution is at 50 - 60 °C, the solution flows at 0.3 - 0.4 Mpa, the temperature of the mixed solution is 30 - 50 °C, and the polishing time is 10 - 15 min.

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