A processing control method and processing fixing device suitable for thin-walled shell parts

Abstract

The present invention relates to the field of thin-walled parts processing. To address the low pass rate problem in existing thin-walled shell processing, a processing control method and a processing fixture suitable for thin-walled shell parts are provided, comprising: S100, testing the maximum continuous processing length D of the shell wall thickness to the designed value when the shell wall is not supported along its width; S200, designing the insert size based on the shell structure size and the maximum continuous processing length D, with the maximum insert length not exceeding D; S300, roughly processing the material to form a prefabricated shell, wherein the shell is divided into multiple processing areas by a plurality of crisscrossing ribs, and the wall thickness of each processing area is greater than the designed value; S400, processing the wall thickness of each processing area to the designed value; after each processing area is processed, a corresponding insert is placed in the corresponding area and the position of the insert is stabilized by pressure. The present invention measures the maximum continuous processing length of thin-walled shell parts and the deformation effect caused by stress concentration.

Description

Technical Field

[0001] The present invention relates to the field of thin-walled parts processing, and in particular to a processing control method and a processing fixing device suitable for thin-walled shell parts. Background Art

[0002] Thin-walled parts processing refers to the manufacturing and machining of parts with relatively thin walls. Due to their structural characteristics—relatively thin wall thickness compared to other components—these parts are prone to deformation and vibration during machining, requiring specialized machining strategies and techniques to ensure the quality and precision of the final product. For example, during the cutting process, thin-walled parts are susceptible to vibration due to tool forces, affecting machining accuracy. In the aerospace industry, thin-walled parts can minimize fuselage weight. Thin-walled outer shells can be used to house and protect certain devices, such as those made of polyetheretherketone (PEEK), for thermal insulation and protection. While PEEK products can be directly molded through methods like injection molding, they also have significant drawbacks. These include controlling the temperature and ensuring uniform crystallinity of the PEEK. Various heat treatments can also lead to dimensional errors in the final PEEK product. This is particularly challenging for products with dimensions of 500mm x 300mm but a thickness of only 2mm. Achieving the required dimensions without milling presents a significant challenge. Consequently, milling has become the primary machining method for these thin-walled aerospace parts, where both size and appearance are critical. However, there are several difficulties in processing products that are too thin. First, the product may deform. Second, the product may vibrate during processing due to its thinness, affecting the surface roughness of the product. Third, the product may be deformed during processing, due to product vibration and structural reasons. When the product is processed to the last few millimeters, it is easy for the product to break and become scrapped. Therefore, an effective processing control method and a processing fixture for the product are urgently needed. Summary of the Invention

[0003] The purpose of the present invention is to provide a processing control method suitable for thin-walled shell parts, so as to solve the problem of low qualified rate in the existing processing of thin-walled shell parts.

[0004] Another object of the present invention is to provide a processing and fixing device suitable for thin-walled shell parts, which, in conjunction with a processing control method, reduces the deformation and vibration of the shell during processing and improves the product qualification rate.

[0005] The embodiments of the present invention are achieved through the following technical solutions:

[0006] A processing control method applicable to thin-walled shell parts, comprising:

[0007] S100, in the case where the shell wall is not supported along its width direction, testing the shell wall thickness to be machined to a maximum continuous machining length D of the designed value, when the continuous machining length exceeds D, the deformation of the shell wall exceeds the deformation threshold;

[0008] S200, designing the insert size according to the shell structure size and the maximum continuous processing length D, wherein the maximum length of the insert does not exceed D;

[0009] S300, roughly processing the material to form a prefabricated shell, wherein the shell is divided into multiple processing areas by a plurality of crisscrossing rib walls, and the wall thickness of each processing area is greater than the design value;

[0010] S400, processing the wall thickness of each processing area to the designed value; after processing each processing area, placing the corresponding insert in the corresponding area and stabilizing the position of the insert by pressure.

[0011] Preferably, the step S400 includes: selecting a priority processing area for wall thickness processing, and then selecting a secondary processing area for wall thickness processing; the side wall of the priority processing area includes at least a section of the side wall of the shell; the side walls of the secondary processing area are all the rib walls.

[0012] Preferably, when the length and / or width of the processing area is greater than D, segmented processing is performed, and after each segment of processing is completed, inserts are placed in the corresponding area and the positions of the inserts are stabilized by applying pressure.

[0013] Preferably, when the length and width of the processing area are both greater than D, the inserts are initially laid along the width direction of the processing area.

[0014] Preferably, when the area to be processed is rectangular and there is a set of opposite outer walls in the area to be processed that abut against the inserts, the inserts are initially laid along the extension direction of the other set of outer walls.

[0015] Preferably, the S100 includes:

[0016] A100, acquiring initial image data of the prefabricated shell;

[0017] A200, when processing the shell wall along a certain direction, real-time collection of processing image data of the shell; by comparing the processing image data with the initial image data, a real-time deformation variable data set is obtained;

[0018] A300, when the real-time deformation amount data set initially satisfies the first condition and / or the second condition, the shell wall length corresponding to the real-time deformation amount data set is the maximum continuous processing length D;

[0019] The first condition is that data greater than a deformation threshold appears for the first time in the real-time deformation amount data group;

[0020] The second condition is that the continuous deformation segment in the real-time deformation amount data set is greater than the maximum continuous deformation length M, and the deformation data of the continuous deformation segment is continuous and greater than the minimum deformation threshold Q.

[0021] Preferably, the real-time deformation variable data group includes: a first deformation variable data group and a second deformation variable data group, the data values ​​in the first deformation variable data group are the differences between each processed image data and the initial image data, and the data values ​​in the second deformation variable data group are the differences between a certain processed image data and the previous processed image data.

[0022] A processing and fixing device suitable for thin-walled parts of an outer shell includes: a base, a positioning block, a positioning column and a pressure plate, the base is provided with a positioning groove; the positioning block is used to be placed in the positioning groove, and the positioning block is used to be sleeved in the positioning hole of the outer shell; the positioning column is used to be sleeved in the positioning cylinder of the outer shell; there are several pressure plates, several of which are connected to the base and arranged along the circumference of the base, and the pressure plates are used to apply pressure to the inserts in the processing control method.

[0023] Preferably, the pressure plate includes: a first clamping assembly and a second clamping assembly, the first clamping assembly is used to abut against the insert in the priority processing area; the second clamping assembly is longer than the first clamping assembly, and the second clamping assembly is used to abut against the insert in the secondary processing area.

[0024] Preferably, the first clamping assembly and the second clamping assembly both include: a connecting column, an abutment plate, an elastic member, a guide column and an adjusting nut, the connecting column including a large diameter section and a small diameter section connected to each other, the large diameter section being connected to the base; one end of the abutment plate has a rotating hole, and the other end of the abutment plate extends toward the processing area; the rotating hole includes a small hole section and a large hole section connected to each other, the connecting column is passed through the rotating hole, and one end of the small diameter section close to the large diameter section is located in the large hole section, and the abutment plate is also provided with an adjusting hole; the elastic member is sleeved on one end of the small diameter section close to the large diameter section, and the end of the elastic member away from the large diameter section is connected or abutted to the abutment plate; the guide column is connected to the base, and when the elastic member is in a natural state, the adjustment hole is located above the guide column; the adjusting nut is used to be connected to the end of the guide column away from the base.

[0025] The present invention has at least the following beneficial effects:

[0026] The present invention measures the maximum continuous processing length for thin-walled outer shells with large shapes, thereby reducing the deformation effect caused by stress concentration of the milling tool on the shell wall when the wall thickness is too long; after processing a certain length of the shell wall, the processed shell wall is limited by the insert, which can reduce the deformation and vibration of the shell wall in the subsequent processing process and improve the product qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 A schematic diagram of the cooperation between the processing fixture device for thin-walled shell parts and the shell;

[0029] Figure 2 Schematic diagram of the structure of the shell;

[0030] Figure 3 It is a structural diagram of the processing fixture;

[0031] Figure 4 Schematic diagram of the connection structure between the abutment plate and the connecting column;

[0032] Icon: 1-base, 11-positioning groove, 2-positioning block, 3-positioning hole, 4-positioning column, 5-positioning cylinder, 6-pressure plate, 61-first clamping assembly, 62-second clamping assembly, 63-connecting column, 631-large diameter section, 632-small diameter section, 64-abutment plate, 641-rotating hole, 6411-small hole section, 6412-large hole section, 642-adjusting hole, 65-elastic part, 66-guide column, 67-adjusting nut, 7-insert, 8-housing, 81-priority processing area, 82-secondary processing area, 83-side wall, 84-rib wall. DETAILED DESCRIPTION

[0033] In order to make the purpose, method scheme and advantages of the embodiments of the present invention clearer, the method scheme in the embodiments of the present invention is clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] Example 1: A processing control method applicable to a thin-walled part of a housing 8, comprising:

[0035] S100, in the case where the shell wall is not supported along its width direction, testing the shell wall thickness to be machined to a maximum continuous machining length D of the designed value, when the continuous machining length exceeds D, the deformation of the shell wall exceeds the deformation threshold;

[0036] S200, designing the size of the insert 7 according to the structural dimensions of the housing 8 and the maximum continuous processing length D, wherein the maximum length of the insert 7 does not exceed D;

[0037] S300, roughly processing the material to form a prefabricated shell, wherein the shell is divided into multiple processing areas by a plurality of crisscross rib walls 84, and the wall thickness of each processing area is greater than the design value;

[0038] S400, processing the wall thickness of each processing area to the designed value; after processing each processing area, placing the corresponding insert 7 in the corresponding area and stabilizing the position of the insert 7 by pressure.

[0039] During the specific implementation process, the thin-walled part of the shell 8 is usually composed of two symmetrical parts. The two parts are connected to form a shell with an inner cavity, and the device that needs to be protected can be placed in the shell. Since the wall thickness of the thin-walled part of the shell 8 is usually completed by milling, the stress of the tool on the thin wall, the vibration of the processing, and the heat generated by the processing during the milling process may all cause the thin wall to deform. Among them, thermal deformation is usually solved by adding a cooling method during the processing, such as using coolant, which can not only take away the heat generated during the cutting process, but also play a lubricating role and reduce frictional heat. This embodiment mainly conceives a processing control method based on the stress of the tool on the thin wall and the vibration during processing, so as to minimize the influence of stress and reduce vibration. The rough processing in S300 refers to processing the material to a shape that initially has a shell structure, and the subsequent processing is only to further reduce the wall thickness and process the surface smoothness. The design value in S300 refers to the wall thickness data designed on the drawing.

[0040] like Figure 2 As shown, the thin-walled shell 8 is often provided with a plurality of ribs 84 inside. The ribs 84 not only increase the structural strength of the shell 8, but also make the inner cavity structure of the shell 8 more adaptable to the structure and quantity of the contents. In this embodiment, the shell 8 is arranged into multiple processing areas according to the distribution of the ribs 84, and the processed parts are supported and restricted by the inserts 7 to reduce deformation and vibration, especially when the thickness of the processed parts is already very thin, which is more susceptible to the influence of tool stress and vibration. In addition, when the shell wall of the thin-walled shell 8 is as Figure 2As shown, when the length is very long and the width is very narrow, during the tool's machining process, the thin-walled section of the shell 8 gradually grows and the thick section gradually shrinks. Since the tool is at the intersection of the thin-walled and thick-walled sections, the tool stress on the shell wall, especially the thin-walled section, gradually increases. Therefore, when machining large, thin-walled shells 8, this embodiment prioritizes testing the maximum continuous machining length. The shell wall in S100 refers to the side wall of the prefabricated shell. When the tool continuously mills a length exceeding D, the stress on the shell wall increases, significantly increasing the probability of deformation exceeding a threshold. Therefore, before the tool continuously mills a length exceeding D, this embodiment uses inserts 7 to support and restrain the machined portion of the shell wall, reducing the risk of deformation. For larger machining areas, multiple inserts 7 can be provided for filling support. To further stabilize the connection between multiple inserts 7, mating protrusions and grooves can be provided on the edges of adjacent inserts 7 to increase the stability of the relative positions of the inserts 7.

[0041] Example 2: In order to further reduce the deformation of the shell wall and avoid obstruction between the force-applying components when stabilizing the insert 7, improvements are made on the basis of Example 1. In this embodiment, the step of S400 includes: selecting the priority processing area 81 for wall thickness processing, and then selecting the secondary processing area 82 for wall thickness processing; the side wall of the priority processing area 81 includes at least a section of the side wall 83 of the shell; the side walls of the secondary processing area 82 are all the rib walls 84.

[0042] During the specific implementation process, the side wall 83 can be seen Figure 2 As shown, it refers to the side wall of the edge of the shell 8. The processing sequence can generally follow the principle of from outside to inside. The shell 8 can be clamped by a vise. At this time, the outer wall surface of the side wall 83 can be supported by the vise, that is, there are processing areas with supported outer walls in several priority processing areas 81, and such areas can be processed first. If the areas where the side walls are all rib walls 84 are processed first, such areas have no prior support force, and the tool stress and vibration have a greater impact on the deformation of the rib walls 84. In addition, if the areas where the side walls are all rib walls 84 are processed first, the holding assembly used to stabilize the position of the insert 7 will be arranged across the priority processing area 81, and when the side walls of the priority processing area 81 need to be processed, it will interfere with the feed of the tool.

[0043] Example 3: In order to increase the morphological stability during processing of large processing areas, improvements are made based on Example 2. In this embodiment, when the length and / or width of the processing area is greater than D, segmented processing is performed. After each segment of processing is completed, inserts 7 are placed in the corresponding area and the position of inserts 7 is stabilized by pressure.

[0044] In a specific implementation, if the length and / or width of the processing area is greater than D, the number of inserts 7 used in the area is greater than 1. The length and width of the corresponding area of ​​each segmented processing is less than or equal to D. After each segmented processing is completed, the corresponding insert 7 is placed and pressed in the corresponding area.

[0045] Example 4: In order to further increase the stability of the shell 8 during processing, improvements are made based on Example 3. In this example, when the length and width of the processing area are both greater than D, the inserts 7 are initially laid along the width direction of the processing area.

[0046] During the specific implementation process, since the length and width of the processing area are both greater than D, the number of inserts 7 laid along the length and width directions of the processing area is greater than 1. If the inserts 7 are laid preferentially along the length direction, due to the longer processing length in the length direction, the number of inserts 7 required to fully lay them in the length direction is greater, and thus the number of inserts 7 required for the insert group to simultaneously abut against three sides of the processing area increases. When at least three side walls in the processing area abut against the inserts 7 simultaneously, the stability of the shell 8 is further improved. Therefore, this embodiment prioritizes laying along the width direction of the processing area, reducing the time it takes for the three side walls of the processing area to be simultaneously supported. In addition, after the inserts 7 are fully laid along a certain direction, the mutual restrictions between the inserts 7 can increase the positional stability of the inserts 7. Therefore, in the early stages of processing, choosing to lay the inserts 7 along the width direction of the processing area can also increase the positional stability of the inserts 7.

[0047] Example 5: In order to further increase the stability of the shape of the shell 8 during the processing, improvements are made on the basis of Example 4. In this embodiment, when the area to be processed is rectangular and there is a set of relative outer walls in the area to be processed that abut against the insert 7, the insert 7 is initially laid along the extension direction of the other set of outer walls.

[0048] In the specific implementation process, before the processing area is processed, the processing area around it is partially or completely processed and filled with inserts 7, so that the outer wall of the processing area is partially or completely supported by the inserts 7. If the outer wall of the processing area is completely supported by the inserts 7, the technical solution in Example 4 can be followed, and the inserts 7 are preferably laid along the width direction of the processing area. Figure 2 As shown, the area to be processed is rectangular and two outer walls in the length direction or two outer walls in the width direction are supported by inserts 7. Inserts 7 can be laid along the other group of outer walls first to achieve stability of the three sides of the processing area as soon as possible.

[0049] Example 6: This example provides a method for testing the maximum continuous processing length D based on Examples 1-5, wherein S100 includes:

[0050] A100, acquiring initial image data of the prefabricated shell;

[0051] A200, when processing the shell wall along a certain direction, real-time collection of processing image data of the shell; by comparing the processing image data with the initial image data, a real-time deformation variable data set is obtained;

[0052] A300, when the real-time deformation amount data set initially satisfies the first condition and / or the second condition, the shell wall length corresponding to the real-time deformation amount data set is the maximum continuous processing length D;

[0053] The first condition is that data greater than a deformation threshold appears for the first time in the real-time deformation amount data group;

[0054] The second condition is that the continuous deformation segment in the real-time deformation amount data set is greater than the maximum continuous deformation length M, and the deformation data of the continuous deformation segment is continuous and greater than the minimum deformation threshold Q.

[0055] During specific implementation, image data can be collected using existing laser scanning technology to quickly acquire three-dimensional data of the shell 8 without contacting the shell 8. Image data can also be collected using existing machine vision technology, such as camera capture, infrared capture, and video capture. Processed image data represents real-time image data during the machining process. During tool advancement, images of the machined portion of the shell wall can be captured in real time, with the capture frequency adjustable as needed. The processed image data is compared with the corresponding location in the initial image data to determine the real-time deformation corresponding to each processed image data, thereby generating a real-time deformation data set. By analyzing the deformation data set, the image data at which deformation first fails to meet the requirements for the use of the shell 8 during tool advancement can be obtained. The maximum machined length can be determined by comparing the machined length corresponding to the previous image data. Determination of whether deformation fails to meet the requirements for the use of the shell 8 can be performed using the conditions in A300. The maximum deformation of the shell 8, i.e., the deformation threshold, can be set based on actual conditions. When the deformation at a specific point in the machined outer wall exceeds the deformation threshold, the shell 8 is considered unsatisfactory. Since continuous deformation during the processing will affect the structural strength of the shell 8 and the installation compatibility with internal components, it is also necessary to limit the length of the continuous deformation section, where the sizes of M and Q can be set according to actual conditions, for example, M is set to 8 cm and Q is set to 0.05 mm.

[0056] Example 7: In order to further improve the processing qualification rate of the product, improvements are made on the basis of Example 6. In this embodiment, the real-time deformation variable data group includes: a first deformation variable data group and a second deformation variable data group. The data value in the first deformation variable data group is the difference between each processed image data and the initial image data, and the data value in the second deformation variable data group is the difference between a certain processed image data and the previous processed image data.

[0057] During the specific implementation process, the first deformation variable data set can be mainly used for the first condition. The second deformation variable data set can be mainly used for the second condition. The second condition additionally considers the difference between adjacent data. When the first and second conditions need to be met simultaneously, even if the deformation of the deformation data of a certain processing position compared with the initial image data is less than the deformation threshold, it may not meet the second condition, that is, if the deformation difference between it and the adjacent processing point is too large, it will also be judged as the deformation not meeting the requirements. Of course, the two deformation variable groups can also be used for the judgment of the first and second conditions at the same time, so that the final value of the maximum continuous processing length D is more reasonable, thereby improving the qualified rate of the processed products.

[0058] Example 8: In order to cooperate with the implementation of the processing control method in Examples 1-7, as shown in FIG. Figure 1-3 As shown, this embodiment provides a processing and fixing device suitable for thin-walled shell parts, including: a base 1, a positioning block 2, a positioning column 4 and a pressure plate 6, the base 1 is provided with a positioning groove 11; the positioning block 2 is used to be placed in the positioning groove 11, the positioning block 2 is used to be sleeved in the positioning hole 3 of the shell 8; the positioning column 4 is used to be sleeved in the positioning cylinder 5 of the shell 8; there are several pressure plates 6, several of the pressure plates 6 are connected to the base 1 and are arranged along the circumference of the base 1, and the pressure plates 6 are used to apply pressure to the insert 7 in the processing control method.

[0059] In the specific implementation process, the base 1 can be pressed on the machine tool, the positioning block 2 cooperates with the positioning hole 3 on the shell 8, and the positioning column 4 cooperates with the positioning cylinder 5 on the shell 8 to achieve the positioning and stability of the shell 8. Figure 1 As shown, the shape of the positioning block 2 is set to a rectangular parallelepiped. After the size of the insert 7 and its corresponding processing area are designed according to the S200 operation, a pressing plate 6 is set in the area corresponding to each insert 7 to press the insert 7 through the pressing plate 6.

[0060] Example 9: In order to distinguish and hold the inserts 7 in the priority processing area 81 and the secondary processing area 82, an improvement is made on the basis of Example 8, such as Figure 1-3 As shown, in this embodiment, the pressure plate 6 includes: a first clamping assembly 61 and a second clamping assembly 62, the first clamping assembly 61 is used to abut against the insert 7 in the priority processing area 81; the length of the second clamping assembly 62 is greater than the first clamping assembly 61, and the second clamping assembly 62 is used to abut against the insert 7 in the secondary processing area 82.

[0061] During the specific implementation process, Figure 1 The shorter pressing plate 6 is the first pressing assembly 61, and the longer pressing plate 6 is the second pressing assembly 62. The location and number of the two pressing assemblies are determined by the structure of the housing 8. Figure 1 For exemplary purposes only, when the housing 8 is structured as Figure 2When the structure is shown, the corresponding processing fixture is used.

[0062] Example 10: In order to make the pressing plate 6 not affect the feeding of the tool and realize the simple pressing and holding of the insert 7, an improvement is made on the basis of Example 9, as shown in FIG. Figure 1-4 As shown, in this embodiment, the first clamping assembly 61 and the second clamping assembly 62 both include: a connecting column 63, an abutment plate 64, an elastic member 65, a guide column 66 and an adjusting nut 67, the connecting column 63 includes a large diameter section 631 and a small diameter section 632 connected to each other, the large diameter section 631 is connected to the base 1; one end of the abutment plate 64 is connected to a rotating hole 641, and the other end of the abutment plate 64 extends toward the processing area; the rotating hole 641 includes a small hole section 6411 and a large hole section 6412 connected to each other, the connecting column 63 is passed through the rotating hole 641, The end of the small diameter section 632 close to the large diameter section 631 is located in the large hole section 6412, and the abutment plate 64 is also provided with an adjustment hole 642; the elastic member 65 is sleeved on the end of the small diameter section 632 close to the large diameter section 631, and the end of the elastic member 65 away from the large diameter section 631 is connected to or abuts the abutment plate 64; the guide column 66 is connected to the base 1, and when the elastic member 65 is in a natural state, the adjustment hole 642 is located above the guide column 66; the adjusting nut 67 is used to be connected to the end of the guide column 66 away from the base 1.

[0063] During the specific implementation process, in order to increase the adaptability of the abutment plate 64 to the position of the insert 7, the abutment plate 64 can be set as a telescopic plate. The elastic member 65 can be a spring. The adjustment hole 642 can be a bar-shaped hole, and the adjustment nut 67 cannot pass through the adjustment hole 642. In order to prevent the pressure plate 6 from interfering with the feed of the tool, the pressure plate 6 and the connecting column 63 are rotatably connected in this embodiment. Before using the abutment plate 64 to press the insert 7, the abutment plate 64 is rotated so that the abutment plate 64 is away from the top of the processing area. In order to allow the abutment plate 64 to rotate before use, under the action of the elastic member 65, the abutment plate 64 maintains a certain height, thereby preventing the guide column 66 from penetrating the adjustment hole 642. When it is necessary to use the abutment plate 64 to press the corresponding insert 7, the abutment plate 64 is rotated, and then the adjustment nut 67 is installed above the guide column 66 and the adjustment nut 67 is screwed to press the abutment plate 64 down until the abutment plate 64 presses the insert 7. A protrusion may be provided at the lower portion of one end of the abutting plate 64 away from the connecting column 63 , and the protrusion abuts against the insert 7 .

[0064] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations are readily apparent to those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A processing control method suitable for thin-walled shell parts, characterized in that: include: S100, in the case where the shell wall is not supported along its width direction, testing the shell wall thickness to be machined to a maximum continuous machining length D of the designed value, when the continuous machining length exceeds D, the deformation of the shell wall exceeds the deformation threshold; S200, designing the insert size according to the shell structure size and the maximum continuous processing length D, wherein the maximum length of the insert does not exceed D; S300, roughly processing the material to form a prefabricated shell, wherein the shell is divided into multiple processing areas by a plurality of crisscrossing rib walls, and the wall thickness of each processing area is greater than the design value; S400, processing the wall thickness of each processing area side wall to the designed value; After each processing area is processed, the corresponding insert is placed in the corresponding area and the position of the insert is stabilized by pressure; The S100 includes: A100, acquiring initial image data of the prefabricated shell; A200, when processing the shell wall along a certain direction, real-time collection of processing image data of the shell; by comparing the processing image data with the initial image data, a real-time deformation variable data set is obtained; A300, when the real-time deformation amount data set initially satisfies the first condition and / or the second condition, the shell wall length corresponding to the real-time deformation amount data set is the maximum continuous processing length D; The first condition is that data greater than a deformation threshold appears for the first time in the real-time deformation amount data group; The second condition is that the continuous deformation segment in the real-time deformation amount data set is greater than the maximum continuous deformation length M, and the deformation data of the continuous deformation segment is continuous and greater than the minimum deformation threshold Q.

2. The processing control method according to claim 1, characterized in that: The step S400 includes: selecting a priority processing area for wall thickness processing, and then selecting a secondary processing area for wall thickness processing; the side wall of the priority processing area includes at least a section of the side wall of the shell; the side walls of the secondary processing area are all the rib walls.

3. The processing control method according to claim 2, characterized in that: When the length and / or width of the processing area is greater than D, segmented processing is performed. After each segment of processing is completed, inserts are placed in the corresponding area and the position of the inserts is stabilized by pressure.

4. The processing control method according to claim 3, characterized in that: When the length and width of the processing area are both greater than D, the inserts are initially laid along the width direction of the processing area.

5. The processing control method according to claim 4, characterized in that: When the area to be processed is rectangular and a group of opposite outer walls in the area to be processed abut against the inserts, the inserts are initially laid along the extension direction of the other group of outer walls.

6. The processing control method according to claim 1, characterized in that: The real-time deformation variable data group includes: a first deformation variable data group and a second deformation variable data group, the data value in the first deformation variable data group is the difference between each processed image data and the initial image data, and the data value in the second deformation variable data group is the difference between a certain processed image data and the previous processed image data.

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