Hollow blade profile shape optimization processing device and method

Abstract

The application discloses a hollow blade profile shape optimization processing device and processing method, and belongs to the technical field of precision casting of aero-engine parts, and comprises the following steps: weighing a proper amount of filling wax, and placing the filling wax in a heating container; opening a heating switch, so as to avoid that the filling wax is heated sharply, and the heating power is controlled to be about 30 min to melt the wax material; measuring the temperature of the filling wax, and controlling the temperature to be in a temperature interval of 1.1-1.2 times of the melting point; using a small metal spoon with a nest to scoop a small amount of liquid filling wax, and pouring the liquid filling wax into a gap of a core, and the liquid filling wax is solidified in 5-10 s; repeating the above operation to fill the specified gap of the core; finally, using a scraper to scrape off the excess filling wax, and ensuring that the filling wax and the core surface transition is smooth. The application pre-pours the wax liquid into the gap of the core, and then carries out wax mold pressing, so that the generation of local deformation of the wax mold surface can be effectively avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of precision casting of aero-engine parts, in particular, to a hollow blade profile shape optimization processing device. In addition, the present application also relates to a processing method comprising the hollow blade profile shape optimization processing device. BACKGROUND

[0002] The information provided in this section is for the purpose of generally presenting the context of the present application. To the extent that the descriptions in this section describe the work of the inventors, and to the extent that the descriptions are not considered to be prior art to the present application, the descriptions are not, and should not be considered to be, admitted as prior art to the present application.

[0003] The hot end blade of an aero-engine usually has a complex three-dimensional curved surface, and has strict shape and position tolerance requirements in size accuracy, so as to achieve the expected blade aerodynamic performance. In order to improve the temperature resistance of the blade, different mainstream technologies are usually used for processing. The hollow air cooling design of the blade is an important one: the cold air passes through the complex channel inside the blade, and carries away the heat of the blade, so as to ensure the normal work of the blade.

[0004] The production method of the blade in the precision casting industry is usually to assemble a ceramic core consistent with the shape of the internal cavity of the blade in a wax mold mold, and then to press the wax mold to obtain a wax mold with a ceramic core. Then, through the processes of shell making, smelting pouring, opening box cleaning, and core removal, a hollow blade is finally obtained.

[0005] We found the following problems through research in the production and manufacturing process:

[0006] When the hollow blade is pressed into a wax mold mold, paste-like and flowable wax material needs to be injected into the inner cavity of the mold and the gap between the core. In order to enhance heat exchange, the core usually has structures such as inclined ribs, turbulence columns and partitions, and the ceramic core is as shown in the accompanying drawings. Figure 1

[0007] Due to the decrease in temperature and incomplete crystallization of high molecules during the solidification process of the paste-like wax material, both of which will cause the volume of the solid wax material to be smaller than that of the paste-like wax material. The shrinkage of the wax material at the core gap is greater than that of the wax mold on the core part, which causes the local deformation of the wax mold surface as shown in the accompanying drawings, and makes it difficult to obtain a complete wax mold, affecting the wall thickness control effect of the real sheet wax mold. Figure 2

[0008] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY​​

[0009] In view of at least one of the above technical problems, the application provides a hollow blade profile shape optimization processing device, which can effectively avoid the generation of local deformation of the wax model surface by pre-filling the wax liquid into the gap of the core after melting the wax block, and then performing wax mold pressing.

[0010] Meanwhile, the application also provides a processing method using the above-mentioned hollow blade profile shape optimization processing device.

[0011] According to an aspect of the application, a hollow blade profile shape optimization processing device is provided for filling wax material into the gap of a hollow blade core, which comprises a wax injection pipe, a heating box, a stirring and heating assembly, a motor, a rotating shaft and a connecting piece:

[0012] The heating box is used for containing wax blocks, and the bottom of the heating box is provided with a liquid outlet. The motor is arranged on the outer wall of the heating box, and the stirring and heating assembly is arranged in the heating box and connected with the motor. The motor is used to drive the stirring and heating assembly to rotate, and the stirring and heating assembly is used to stir and cut the wax blocks and heat the wax blocks to melt them into a wax liquid. The wax injection pipe is used to connect with the liquid outlet and inject the wax liquid into the gap of the hollow blade core.

[0013] The stirring and heating assembly comprises a plurality of layers of stirring electric heating plates arranged at intervals. The rotating shaft is rotatably arranged on the side wall of the heating box, and is horizontally arranged on the side wall of the heating box. The first end of the rotating shaft is connected with the output shaft of the motor, and the second end of the rotating shaft is connected with the connecting piece. The connecting piece is connected with each layer of stirring electric heating plates. The rotating shaft is used to drive each layer of stirring electric heating plates to rotate through the connecting piece.

[0014] In some embodiments of the application, the hollow blade profile shape optimization processing device further comprises a plurality of layers of layered filter pieces arranged at intervals. The first end of the layered filter piece, which is away from the rotating shaft and the connecting piece, is connected to the side wall of the heating box. Each layer of layered filter pieces is arranged between each layer of stirring electric heating plates. The layered filter piece is connected only at the first end to the side wall of the heating box, and the other sides have a gap with the side wall of the heating box. The plurality of layers of layered filter pieces are connected at intervals along the vertical direction of the heating box to the side wall on one side of the heating box, and the layered filter pieces and each layer of stirring electric heating plates are arranged in a staggered manner.

[0015] In some embodiments of the application, the layered filter piece comprises a filter mesh plate in the form of an arc-shaped plate structure, and the first end of the filter mesh plate, which is away from the rotating shaft and the connecting piece, is connected to the side wall of the heating box.

[0016] In some embodiments of the present application, the multi-layer spaced stirring electric hot plate comprises a first stirring electric hot plate and a second stirring electric hot plate, both of which are arc-shaped plate-shaped electric hot plates, and the surfaces of the first stirring electric hot plate and the second stirring electric hot plate are both arrayed with spikes.

[0017] In some embodiments of the present application, the first ends of the first stirring electric hot plate and the second stirring electric hot plate are respectively connected with the connecting piece, the first end is the end close to the rotating shaft, the second end is the end away from the rotating shaft, and the second ends of the first stirring electric hot plate and the second stirring electric hot plate have a gap with the side wall of the heating box.

[0018] In some embodiments of the present application, the side wall of the heating box is provided with a heat preservation layer of a hollow structure.

[0019] In some embodiments of the present application, the top of the heating box is provided with a top cover, and the bottom of the top cover is provided with a heat insulation pad.

[0020] According to another aspect of the present application, a hollow blade profile shape optimization processing method is also provided, which comprises the hollow blade profile shape optimization processing device, and the hollow blade profile shape optimization processing method comprises the following steps:

[0021] S100, placing a wax block for filling in the heating box, and opening the stirring heating assembly and the motor to melt the wax block;

[0022] S200, measuring the temperature of the wax liquid for filling;

[0023] S300, pouring the wax liquid into the gap of the hollow blade core through the wax pouring pipe or directly through the spoon, and waiting for the wax liquid to solidify;

[0024] S400, using a scraper to remove the solidified wax material exposed outside the gap of the hollow blade core;

[0025] S500, performing pressing of the hollow blade wax mold.

[0026] In some embodiments of the present application, in step S100, in order to avoid that the wax liquid for filling is heated intensively, the heating time is controlled within 30 minutes, and the wax material is melted and then the heating is turned off for heat preservation.

[0027] In some embodiments of the present application, in step S200, the temperature of the wax liquid should be between 1.1 times and 1.2 times the melting point temperature, and if the temperature is too low, the heating should be turned on again, and if the temperature is too low, the temperature can be lowered by standing.

[0028] The present application has the following beneficial effects:

[0029] The hollow blade profile shape optimization processing device of the application pours the wax block in the heating box 1, and clamps and heats the wax block through the stirring and heating assembly 2, realizes the rapid melting of the wax block, and can fully cut, stir and heat and melt the wax blocks in each layer through the multi-layer arranged stirring electric heating plate, improves the melting uniformity and melting efficiency of the wax liquid, reduces the heating time, avoids the safety hidden danger caused by the long time and severe heating of the wax liquid, and affects the operation of workers. The heating box 1 is connected with the wax injection pipe, the gap of the core can be conveniently filled with wax through the wax injection pipe, of course, the wax liquid can also be manually scooped with a spoon for wax filling operation, and flexible operation can be realized according to the site environment.

[0030] The hollow blade profile shape optimization processing method of the application also has the beneficial effects described above. It also avoids the problem of surface deformation of the wax mold caused by large shrinkage of the wax material in the gap of the core. After the pre-filled wax material solidifies, it can be considered as a whole with the core. The paste-like wax material no longer needs to fill the gap of the core during the pressing process, and then the wax material on the upper part of the gap and the wax material on the upper part of the core shrink consistently, avoiding the problem of surface deformation. The strength of the core is improved. The wax material enters the inner cavity of the wax mold under a certain injection pressure. The spoiler hole, baffle and inclined rib structure of the core will inevitably increase the force between the wax material and the core. The wax material may break the core, resulting in the scrap of the wax mold; the gap of the core is pre-filled, which can effectively reduce the force between the wax material and the core, and improve the strength of the core. The wax mold filling property is improved. For the core that is difficult to fill with wax material, the gap of the core is pre-filled, which reduces the filling pressure of the wax material and makes it easier to obtain a complete wax mold. For the case where sheet wax mold is used to control the wall thickness of the wax mold, this scheme can better highlight the wall thickness control effect of the wax mold. Sheet wax is usually soft, and needs to be pressed on the specified position of the core with fingers. If the gap of the core is not pre-filled, the sheet wax is prone to sag, which affects the real sheet wax mold wall thickness control effect.

[0031] Of course, implementing any product of the present application does not necessarily require all the advantages described above. In addition to the purposes, features and advantages described above, the present application has other purposes, features and advantages. The present application will be further described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0032] The drawings that form a part of the present application are used to provide a further understanding of the present application, the illustrative embodiments of the present application and their descriptions serve to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0033] Figure 1 is a hollow blade ceramic core actual photograph;

[0034] Figure 2 is a schematic diagram of the surface deformation of the wax mold at the gap of the ceramic core;

[0035] Figure 3 This is a schematic diagram of the wax material pre-filled in the core gap of this application;

[0036] Figure 4 This is a schematic diagram of the interior of the heating box according to a preferred embodiment of this application;

[0037] Figure 5 This is a schematic diagram of the structure of the stirring and heating assembly according to a preferred embodiment of this application;

[0038] Figure 6 This is a schematic diagram of the installation of the layered filter element according to a preferred embodiment of this application;

[0039] Figure 7 This is a schematic diagram of the structure of the layered filter element according to a preferred embodiment of this application;

[0040] Legend: 1. Heating box; 11. Insulation layer; 12. Liquid outlet; 2. Stirring and heating assembly; 21. First stirring heating plate; 22. Second stirring heating plate; 3. Motor; 4. Rotating shaft; 5. Connecting parts; 6. Layered filter; 7. Motor bracket. Detailed Implementation

[0041] The embodiments of this application are described in detail below with reference to the accompanying drawings; however, this application may be implemented in a variety of different ways as defined and covered below.

[0042] Figure 1 This is a picture of a hollow blade ceramic core. Figure 2 This is a schematic diagram of the deformation of the wax mold surface at the gap of the ceramic core; Figure 3 This is a schematic diagram of the wax material pre-filled in the core gap of this application; Figure 4 This is a schematic diagram of the interior of the heating box according to a preferred embodiment of this application; Figure 5 This is a schematic diagram of the structure of the stirring and heating assembly according to a preferred embodiment of this application; Figure 6 This is a schematic diagram of the installation of the layered filter element according to a preferred embodiment of this application; Figure 7 This is a schematic diagram of the structure of a layered filter element according to a preferred embodiment of this application.

[0043] A hollow blade profile shape optimization processing device is used to fill the gaps in the hollow blade core with wax. The device includes a wax injection tube, a heating box 1, a stirring and heating assembly 2, a motor 3, a rotating shaft 4, and a connecting component 5.

[0044] Heating box 1 is used to hold wax blocks. Heating box 1 has a liquid outlet 12 at the bottom. Motor 3 is located on the outer wall of heating box 1. Stirring and heating component 2 is located inside heating box 1 and connected to motor 3. Motor 3 is used to drive stirring and heating component 2 to rotate. Stirring and heating component 2 is used to stir and cut wax blocks and heat wax blocks to melt them into wax liquid. Wax injection tube is used to connect to liquid outlet 12 and inject wax liquid into the gap of hollow blade core.

[0045] The stirring and heating assembly 2 includes multiple layers of spaced stirring heating plates. A rotating shaft 4 is rotatably mounted on the side wall of the heating box 1. The rotating shaft 4 is horizontally mounted on the side wall of the heating box 1. The first end of the rotating shaft 4 is connected to the output shaft of the motor 3, and the second end of the rotating shaft 4 is connected to the connecting piece 5. The connecting piece 5 is also connected to each layer of stirring heating plates. The rotating shaft 4 is used to drive each layer of stirring heating plates to rotate through the connecting piece 5.

[0046] Here, "connector 5" refers to a structure that is connected to each layer of stirring heating plate. In some embodiments, connector 5 is a connecting plate or connecting rod structure.

[0047] This application discloses a hollow blade profile optimization processing device. A heating chamber 1 holds a wax block, which is then clamped and heated by a stirring and heating assembly 2 to achieve rapid melting. A multi-layered stirring heating plate further enhances the uniformity and efficiency of the wax melting process, reducing heating time and preventing prolonged and intense heating that could pose safety hazards and interfere with worker operations. The heating chamber 1 is connected to a wax injection pipe, allowing for convenient wax filling of the core gaps. Alternatively, wax can be manually scooped using a spoon for filling, allowing for flexible operation depending on the site conditions.

[0048] Preferably, please refer to Figure 4 , 5 As shown in Figures 6 and 7, the hollow blade profile optimization processing device also includes multi-layered filter elements 6 arranged at intervals. The first end of the multi-layered filter element 6 away from the rotating shaft 4 and the connecting piece 5 is connected to the side wall of the heating box 1. Each layer of the multi-layered filter element 6 is arranged between the stirring heating plates of each layer. Only the first end of the multi-layered filter element 6 is connected to the side wall of the heating box 1, and the other sides have gaps with the side wall of the heating box 1. The multi-layered filter elements 6 are connected at intervals along the vertical direction of the heating box 1 on one side wall of the heating box 1, and the multi-layered filter elements 6 and each layer of stirring heating plates are arranged alternately.

[0049] Specifically, the layered filter element 6 includes an arc-shaped plate-like filter screen, with the first end of the filter screen away from the rotating shaft 4 and the connector 5 connected to the side wall of the heating box 1.

[0050] Optionally, the layered filter element 6 is connected to the side wall of the heating box 1 only at its first end, while the other sides have gaps with the side wall of the heating box 1.

[0051] Understandably, the multi-layered filter elements 6 are connected at intervals along the vertical direction of the heating box 1 on one side wall of the heating box 1, and the multi-layered filter elements 6 and the stirring heating plates of each layer are arranged alternately to avoid interference between the multi-layered filter elements 6 and the rotation of the stirring heating plates of each layer. The multi-layered filter elements 6 allow the wax blocks to be arranged in layers when placed for heating, which facilitates the stirring heating plates of each layer to stir, cut and heat the wax blocks of each layer separately, which helps to improve the melting speed of the wax blocks. Moreover, the melted wax blocks can flow down through the multi-layered filter elements 6 in a timely manner, so that the multi-layered filter elements 6 can play the role of screening blocky wax blocks, ensuring that the wax blocks are thoroughly stirred and cut, which helps to provide uniformity of wax liquid.

[0052] Preferably, please refer to Figure 5 , 6 As shown in Figure 7, the multi-layered stirring heating plate includes a first stirring heating plate 21 and a second stirring heating plate 22. Both the first stirring heating plate 21 and the second stirring heating plate 22 are heating plates with an arc-shaped plate structure, and the surfaces of the first stirring heating plate 21 and the second stirring heating plate 22 are arranged with spikes in an array.

[0053] Specifically, the first ends of the first stirring heating plate 21 and the second stirring heating plate 22 are respectively connected to the connector 5. The first end is the end close to the rotating shaft 4, and the second end is the end away from the rotating shaft 4. There is a gap between the second ends of the first stirring heating plate 21 and the second stirring heating plate 22 and the side wall of the heating box 1.

[0054] Understandably, the first stirring heating plate 21 and the second stirring heating plate 22 can not only stir and cut the wax block or wax liquid, but also heat the wax material in each layer while stirring, which is beneficial to improve the melting speed of the wax material, while effectively avoiding the wax material from being heated too intensely, which is beneficial to improve the safety of workers' operation.

[0055] The spikes on the first stirring heating plate 21 and the second stirring heating plate 22 enhance the cutting effect of the wax block during rotation and stirring, which helps to quickly break up the wax block. The first stirring heating plate 21 and the second stirring heating plate 22 are arranged in layers, which can uniformly stir and heat the wax material in each layer in the heating box 1, ensuring the uniformity of heating of the wax material.

[0056] Preferably, please refer to Figure 5 As shown, a hollow insulation layer 11 is provided inside the side wall of the heating box 1.

[0057] Optionally, the heating box 1 is provided with a top cover, and a heat insulation pad is provided at the bottom of the top cover.

[0058] It is understandable that the insulation layer 11 of the heating box 1 and the heat insulation pad at the bottom of the top cover can improve the heat preservation performance of the heating box 1, which is conducive to increasing the heat preservation time and reducing the power consumption of heating.

[0059] It should be noted that multiple outlets 12 can be provided at the bottom of the heating box 1, and the diameter of each outlet 12 can be different, so as to connect with wax injection tubes of different diameters, which facilitates wax injection operations with different wax amounts for core gaps of different sizes, and improves the adaptability of the device.

[0060] Of course, for smaller gaps, the top cover of heating box 1 can be opened directly, and a small amount of liquid filling wax can be manually poured into the core gap using a small metal spoon with a notch.

[0061] According to another aspect of this application, a method for optimizing the surface shape of a hollow blade is also provided, which includes the aforementioned apparatus for optimizing the surface shape of a hollow blade. The method for optimizing the surface shape of a hollow blade includes the following steps:

[0062] S100. Place the wax block for filling into the heating box 1, and turn on the stirring and heating component 2 and the motor 3 to melt the wax block;

[0063] S200, Measure the temperature of the wax used for filling;

[0064] S300. Pour the wax liquid into the gap between the hollow blade core through the wax injection tube or directly by scooping the wax liquid with a spoon, and wait for the wax liquid to solidify.

[0065] S400. Use a scraper to remove the cured wax material that is exposed outside the gap between the hollow blade core;

[0066] S500, press the hollow blade wax mold.

[0067] Preferably, in step S100, to avoid the wax used for filling being heated too intensely, the heating time is controlled within 30 minutes. After the wax is melted, the heating is turned off and the wax is kept warm. The heating time should not be too long, as this can easily cause the wax to be heated too intensely, posing a safety hazard, and also making it inconvenient for the operator to manually scoop the wax.

[0068] Preferably, in step S200, the temperature of the wax liquid should be measured between 1.1 and 1.2 times its melting point. If the temperature is too low, heating needs to be restarted; if the temperature is too low, it can be left to cool down. It is understandable that if the temperature of the wax liquid is too low, it is not convenient to pour it into the gap of the core, leaving the operator with too little time for wax pouring and affecting the effect of filling the gap. If the temperature is too high, it affects the curing time of the wax liquid and can also easily pose a safety hazard to the operator.

[0069] The hollow blade profile optimization processing method of this application also has the above-mentioned beneficial effects. It also includes the following beneficial effects:

[0070] 1. It avoids the problem of surface deformation of wax mold caused by large shrinkage of wax material in the gap between the core and the mold core. After the pre-filled wax material solidifies, it can be regarded as a whole with the core. During the pressing process, the paste-like wax material no longer needs to fill the gap between the core and the mold core. As a result, the wax material above the gap and the wax material above the core shrink in the same way, avoiding the problem of surface deformation.

[0071] 2. Improved core strength. When wax enters the wax mold cavity under a certain injection pressure, the baffles, partitions, and ribs inherent in the core will inevitably increase the force between the wax and the core. The wax may break the core, causing the wax mold to be scrapped. Pre-filling the gaps in the core can effectively reduce the force between the wax and the core, thus improving the core strength.

[0072] 3. Improved wax model filling performance. For cores that are difficult to fill with wax, pre-filling the gaps in the cores reduces the filling pressure of the wax, making it easier to obtain wax models with complete shapes.

[0073] 4. For situations where sheet wax models are needed to control the wall thickness of the wax model, this solution can better highlight the wall thickness control effect. Sheet wax is usually soft and needs to be pressed onto the designated position on the core with your fingers. If the gaps in the core are not filled beforehand, the sheet wax is very easy to sink in, affecting the actual sheet wax model wall thickness control effect.

[0074] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0075] This document uses specific examples to illustrate the principles and implementation methods of this application. The examples are merely for the purpose of helping to understand the methods and core ideas of this application. The above descriptions are only preferred embodiments of this application. It should be noted that due to the limitations of written expression, and the existence of an infinite number of specific structures, those skilled in the art can make various improvements, modifications, or variations without departing from the principles of this application, and can also combine the above technical features in an appropriate manner. These improvements, modifications, variations, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered as protected by this application.

Claims

1. A hollow blade profile shape optimization processing device, used for filling the gaps in the core of hollow blades with wax material, characterized in that, The hollow blade profile optimization processing device includes a wax injection tube, a heating box (1), a stirring and heating assembly (2), a motor (3), a rotating shaft (4), and a connecting part (5): The heating box (1) is used to hold the wax block. The bottom of the heating box (1) is provided with a liquid outlet (12). The motor (3) is located on the outer wall of the heating box (1). The stirring and heating assembly (2) is located inside the heating box (1) and connected to the motor (3). The motor (3) is used to drive the stirring and heating assembly (2) to rotate. The stirring and heating assembly (2) is used to stir and cut the wax block and heat the wax block to melt it into wax liquid. The wax injection tube is used to connect to the liquid outlet (12) and inject the wax liquid into the gap of the hollow blade core. The stirring and heating assembly (2) includes multiple layers of spaced stirring heating plates. A rotating shaft (4) is rotatably mounted on the side wall of the heating box (1). The rotating shaft (4) is horizontally mounted on the side wall of the heating box (1). The first end of the rotating shaft (4) is connected to the output shaft of the motor (3). The second end of the rotating shaft (4) is connected to the connector (5). The connector (5) is simultaneously connected to each layer of stirring heating plates. The rotating shaft (4) is used to drive each layer of stirring heating plates to rotate through the connector (5). The hollow blade profile shape optimization processing device also includes multiple layers of spaced layered filter elements (6). The first end of the layered filter element (6) away from the rotating shaft (4) and the connector (5) is connected to the side wall of the heating box (1). Each layer of layered filter element (6) is arranged between each layer of stirring heating plates. Only the first end of the layered filter element (6) is connected to the side wall of the heating box (1), and the other sides are connected to the side wall of the heating box (1). The sidewall of the heating box (1) has gaps. The multi-layered filter element (6) is connected at intervals along the vertical direction of the heating box (1) on one side of the sidewall of the heating box (1), and the multi-layered filter element (6) and each layer of stirring heating plate are staggered. The multi-layered stirring heating plate includes a first stirring heating plate (21) and a second stirring heating plate (22). The first stirring heating plate (21) and the second stirring heating plate (22) are both arc-shaped plate heating plates, and the surfaces of the first stirring heating plate (21) and the second stirring heating plate (22) are arrayed with spikes. The first end of the first stirring heating plate (21) and the second stirring heating plate (22) are respectively connected to the connector (5). The first end is the end close to the rotating shaft (4), and the second end is the end away from the rotating shaft (4). There is a gap between the second end of the first stirring heating plate (21) and the second stirring heating plate (22) and the sidewall of the heating box (1).

2. The hollow blade profile optimization processing device according to claim 1, characterized in that, The layered filter element (6) includes an arc-shaped plate-like filter screen, the first end of which is away from the rotating shaft (4) and the connector (5) is connected to the side wall of the heating box (1).

3. The hollow blade profile optimization processing device according to claim 1, characterized in that, The heating box (1) has a hollow insulation layer (11) inside its side wall.

4. The hollow blade profile optimization processing device according to claim 1, characterized in that, The heating box (1) is equipped with a top cover, and the bottom of the top cover is equipped with a heat insulation pad.

5. A method for optimizing the surface shape of hollow blades, characterized in that, The hollow blade profile shape optimization processing apparatus as described in any one of claims 1-4, the hollow blade profile shape optimization processing method includes the following steps: S100. Place the wax block for filling in the heating box (1), turn on the stirring and heating component (2) and the motor (3) to melt the wax block; S200. Measure the temperature of the wax used for filling. The temperature of the wax should be between 1.1 and 1.2 times the melting point. If the temperature is too low, the heating needs to be turned on again. If the temperature is too low, it can be left to stand and wait for it to cool down. S300. Pour the wax liquid into the gap between the hollow blade core through the wax injection tube or directly by scooping the wax liquid with a spoon, and wait for the wax liquid to solidify. S400. Use a scraper to remove the cured wax material that is exposed outside the gap between the hollow blade core; S500, press the hollow blade wax mold.

6. The hollow blade profile optimization processing method according to claim 5, characterized in that, In step S100, to avoid the wax used for filling being heated too intensely, the heating time is controlled within 30 minutes. After the wax is melted, the heating is turned off and the wax is kept warm.

Images