A support device for thin-walled open members

Abstract

The present application relates to a kind of support device for thin-walled open component, belong to the technical field of additive manufacturing, for solving the one of the problems of large local deformation of existing support device in the additive manufacturing and post-processing process of component, support structure is difficult to remove, support structure volume is large and material cost is high.The support device of the present application includes constraint unit and support unit, constraint unit is used to provide the constraint force of controlled deformation for the additive manufacturing of thin-walled open component, and support unit is used to transmit the constraint force of constraint unit to thin-walled open component.The support device of the present application reduces the local deformation of thin-walled open component, and the operation of removing support is convenient, reduces support material cost and additive machine time cost.

Description

Technical Field

[0001] This invention relates to the field of additive manufacturing technology, and more particularly to a support device for thin-walled open components. Background Technology

[0002] Additive manufacturing technology is becoming increasingly mature in the application of high-end equipment manufacturing technology. The design of large shells, compartments and other components is becoming thinner and lighter. However, the control of the shape of thin-walled components during the manufacturing process has always been a pain point in the industry, especially for thin-walled components with lateral openings. Due to their large local deformation, special support devices are usually required during processing and manufacturing.

[0003] Existing support devices for thin-walled open components typically include a cover plate and ribs. The cover plate seals the lateral opening, while the ribs enhance rigidity. However, this support structure has significant drawbacks. First, the cover plate requires additive manufacturing using the component's manufacturing parameters, resulting in an overly rigid connection between the cover plate and the component, making it difficult to remove through stress concentration. Second, the ribs are relatively thick and large, significantly increasing material consumption and additive manufacturing time. Furthermore, this fixed support structure cannot flexibly adapt to the shape of the lateral opening, making it difficult to effectively control local deformation at the opening. Summary of the Invention

[0004] Based on the above analysis, the present invention aims to provide a support device and method for thin-walled open components, thereby solving one of the problems of existing support devices that easily lead to large local deformation of thin-walled open components, difficulty in removing the support structure, high material cost of the support structure, and long processing time. The objective of the present invention is mainly achieved through the following technical solutions.

[0005] In a first aspect, the present invention provides a support device for a thin-walled open member, comprising a constraint unit and a support unit, the constraint unit being used to provide a constraint force for controlling deformation during additive manufacturing of the thin-walled open member, and the support unit being used to support and transmit the constraint force of the constraint unit to the thin-walled open member.

[0006] Furthermore, the support unit is located between the constraint unit and the thin-walled opening member.

[0007] Furthermore, the overall structure of the constraint unit is cylindrical and nested with the thin-walled opening member.

[0008] Furthermore, the support unit includes multiple sets of support components, which are used to provide support for multiple easily deformable parts of the thin-walled open member.

[0009] Furthermore, the constraint unit includes a housing, the bottom end of which is flush with the bottom end of the thin-walled opening member.

[0010] Furthermore, the thin-walled opening member includes a lateral opening, and the height of the housing is higher than the upper edge height of the highest lateral opening of the thin-walled opening member.

[0011] Furthermore, the constraint unit also includes reinforcing members arranged longitudinally, and a plurality of the reinforcing members are fixed to the inner wall of the housing and evenly distributed along the circumference of the housing.

[0012] Furthermore, the wall thickness of the housing and the reinforcing member is 0.5-0.8 times the wall thickness of the thin-walled opening member.

[0013] Furthermore, both the thin-walled opening member and the shell have square cross-sections, and the reinforcing member is located at a right angle on the inner wall of the shell.

[0014] Furthermore, the thin-walled opening member also includes an inner cavity, in which both the constraint unit and the support unit are located.

[0015] Furthermore, there is an equidistant gap in the transverse direction between the outer wall of the constraint unit and the inner wall of the thin-walled opening member, and the support unit is located within the gap.

[0016] Furthermore, the support unit includes a support rod arranged radially along the constraint unit and the thin-walled opening member. The bottom end of the support rod is connected to the outer wall of the constraint unit, and the top end extends obliquely upward and is connected to the edge of the lateral opening.

[0017] Furthermore, the plurality of the support rods are evenly arranged along the edge contour of the lateral opening.

[0018] Furthermore, when setting additive manufacturing parameters, the fusion strength set for the support device is lower than the fusion strength set for the thin-walled open member.

[0019] In a second aspect, the present invention provides a support method for a thin-walled open member, employing the support device described in the first aspect of the present invention.

[0020] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects: 1. The support device for thin-walled open components of the present invention transmits the constraint force of the constraint unit to the thin-walled open component by setting support units. It can arrange the position and number of support units according to the geometric characteristics and process requirements of the thin-walled open component, thereby effectively reducing the deformation area and local deformation of the thin-walled open component in the additive manufacturing process and improving the forming accuracy of the thin-walled open component.

[0021] 2. The support device for thin-walled open components of the present invention effectively reduces the overall external dimensions of the support device by arranging all the support devices in the inner cavity space of the thin-walled open components. This not only increases the stability of the overall structure of the support device, but also reduces the amount of material used in the support device, improves the material utilization efficiency, and reduces manufacturing time.

[0022] 3. The support device for thin-walled open components of the present invention, by setting multiple upwardly inclined support rods in the support unit, makes full use of the characteristic that multiple independent support rods can be removed one by one. While ensuring that the constraint force of the constraint unit is transmitted to the thin-walled open component in an upwardly inclined manner, the support position can be flexibly arranged according to the shape of the thin-walled open component, and the difficulty of subsequent removal of the support device is reduced, thus reducing the workload of the support removal process.

[0023] 4. The support device for thin-walled open members of the present invention has support rods evenly arranged along the edge contour of the lateral opening. The array path of the support rods can be designed according to the different shapes and sizes of the lateral opening, thereby providing precise shape control support for the lateral opening, effectively reducing the amount of local deformation near the lateral opening, with good shape control effect and high flexibility. In addition, in the support removal process, since the support rods are distributed on the edge of the lateral opening, the removal tool can be inserted from the outside of the thin-walled open member through the lateral opening, making the removal process of the support device simpler and easier.

[0024] 5. The support device for thin-walled open components of the present invention, by arranging reinforcing members inside the housing, can significantly improve the structural stability of the constraint unit while maintaining the lightweight nature of the constraint unit, so as to provide sufficient constraint force for the shape control support of the thin-walled open component, improve the material utilization efficiency, and reduce material cost and additive manufacturing machine time cost.

[0025] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained through the embodiments described and the accompanying drawings, which are particularly pointed out. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of the assembly of the thin-walled opening member and the support device according to an embodiment of the present invention; Figure 2 This is a top view of the assembly of the thin-walled opening member and the support device according to an embodiment of the present invention; Figure 3 This is a three-dimensional structural diagram of the support device according to an embodiment of the present invention; Figure 4This is a schematic diagram of the dimensions and structure of a thin-walled open member with a rectangular cross-section according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the existing support device. Figure 6 A schematic diagram showing the deformation results of the additive manufacturing process for thin-walled open components using existing support devices; Figure 7 This is one of the dimensional structural schematic diagrams of the support device according to an embodiment of the present invention; Figure 8 This is a second schematic diagram showing the dimensions and structure of the support device according to an embodiment of the present invention; Figure 9 This is the third schematic diagram of the dimensions and structure of the support device according to an embodiment of the present invention; Figure 10 This is the fourth schematic diagram of the dimensions and structure of the support device according to an embodiment of the present invention; Figure 11 A schematic diagram of the process simulation deformation results of additive manufacturing of thin-walled open components using the support device of an embodiment of the present invention; Figure 12 This is a schematic diagram of the steps of the support method in Embodiment 2 of the present invention.

[0027] Figure label: 1-Constraint unit; 11-Shell; 12-Reinforcing member; 2-Support unit; 21-Support rod; 3-Gap; 4-Thin-walled opening member; 41-Lateral opening; 42-Inner cavity; 5-Cover plate; 6-Rib plate. Detailed Implementation

[0028] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0029] Example 1 In a specific embodiment of the present invention, in order to solve the problem that existing support devices easily lead to large local deformations in thin-walled open components, a support device for thin-walled open components is disclosed, such as... Figure 1 and Figure 2 As shown, it includes a constraint unit 1 and a support unit 2. The constraint unit 1 is used to provide a constraint force to control the deformation of the thin-walled open member 4 during additive manufacturing. The support unit 2 is used to support the thin-walled open member 4 and transmit the constraint force of the constraint unit 1 to the thin-walled open member 4.

[0030] In this embodiment, the support device, specifically the constraint unit 1 and the support unit 2, is made of the same material as the thin-walled opening member 4, and both are manufactured simultaneously using a laser selective melting forming process. This embodiment uses the support unit 2 to transfer the constraint force of the constraint unit 1 to the thin-walled opening member 4. The position and number of the support units 2 can be arranged according to the geometric characteristics and process requirements of the thin-walled opening member 4, thereby effectively reducing the deformation area and local deformation of the thin-walled opening member 4 during the additive manufacturing process and improving the forming accuracy of the thin-walled opening member 4.

[0031] Furthermore, considering that the rigidity of constraint unit 1 would make it difficult to remove the support, support unit 2 is located between constraint unit 1 and thin-walled open member 4, so that constraint unit 1 is not directly connected to thin-walled open member 4, but indirectly transmits constraint force through support unit 2, thereby ensuring that constraint unit 1 provides effective rigid constraint force without increasing the difficulty of removing the support.

[0032] Furthermore, in order to address the issue of providing precise support for the easily deformable parts of the thin-walled open member 4, such as... Figure 1 and Figure 2 As shown, the overall structure of the constraint unit 1 is cylindrical and nested with the thin-walled open member 4; the support unit 2 includes multiple sets, which are used to provide support for multiple easily deformable parts of the thin-walled open member 4.

[0033] In this embodiment, by setting the constraint unit 1 as an integral cylindrical structure, the structure is more stable and reliable, thereby improving the effect of shape control constraint on the thin-walled opening member 4; the constraint unit 1 and the thin-walled opening member 4 are nested together, which is conducive to the flexible arrangement of the support unit 2 and ensures that the constraint force is accurately and reliably transmitted to the easily deformable parts of the thin-walled opening member 4.

[0034] Furthermore, considering that supporting structures are typically quite thick and heavy to ensure rigidity, such as Figure 1 and Figure 3 As shown, the constraint unit 1 includes a shell 11 and a reinforcing member 12. The shell 11 is cylindrical in shape, with its bottom end flush with the bottom end of the thin-walled open member 4, so that it has a common supporting bottom surface and initial coordinate plane during additive manufacturing, thereby ensuring the stability and accuracy of the overall structure. The cross-sectional profile of the shell 11 matches the cross-sectional profile of the thin-walled open member 4, so that the shell 11 and the thin-walled open member 4 can be nested together. The reinforcing member 12 is fixed to the inner wall of the shell 11 to enhance the structural rigidity of the shell 11.

[0035] In this embodiment, by arranging reinforcing members 12 inside the housing 11, the structural stability of the constraint unit 1 can be significantly improved while maintaining the lightweight of the constraint unit 1, so as to provide sufficient constraint force for the shape control support of the thin-walled opening member 4, thereby improving the material utilization efficiency and reducing material cost and additive manufacturing machine time cost.

[0036] Furthermore, the reinforcing member 12 is a plurality of longitudinally arranged circular tubes and evenly distributed along the circumference of the shell 11, so as to reduce the amount of supporting structure material and machining time while improving the structural rigidity of the shell 11.

[0037] Furthermore, when the reinforcing member 12 is a longitudinally arranged circular tube, the wall thickness of the shell 11 and the reinforcing member 12 is 0.5-0.8 times the wall thickness of the thin-walled open member 4, so that the weight and rigidity of the constraint unit 1 can provide a flexible matching support effect for the thin-walled open member 4, avoiding over-constraint or under-constraint.

[0038] Optionally, the reinforcing member 12 can also be a longitudinal rib; the shell 11 can also be configured as a double-layer structure, with the reinforcing member 12 located in the interlayer of the double-layer shell 11.

[0039] The support device in this embodiment can provide good support and shape control for thin-walled open members with circular, elliptical, or irregular cross-sectional shapes. This embodiment takes a support device for a thin-walled open member with a rectangular cross-section as an example. Figure 4 As shown, the thin-walled opening member 4 includes a lateral opening 41 and an inner cavity 42. In order to reduce the deformation of the lateral opening 41, the height of the housing 11 is higher than the upper edge height of the highest lateral opening 41 of the thin-walled opening member 4, so as to ensure that the support unit 2 can be arranged to the upper edge of the lateral opening 41 through the housing 11.

[0040] To reduce deformation at the right angle of the thin-walled open member, such as Figure 2 and Figure 3 As shown, when the cross-sections of the thin-walled open member 4 and the shell 11 are both square, some of the cylindrical reinforcing members 12 are located at the right angles of the inner wall of the shell 11 to ensure the structural strength of the shell 11 at the right angles; some of the reinforcing members 12 can also be arranged on each side of the shell 11 to enhance the side bending stiffness.

[0041] Furthermore, in order to address the issues of large size and high material costs of the support device, such as... Figure 1 and Figure 2 As shown, in this embodiment, both the constraint unit 1 and the support unit 2 are located within the inner cavity 42. By arranging all the support devices within the inner cavity 42 of the thin-walled open member 4, the overall external dimensions of the support devices are effectively reduced. This not only increases the overall structural stability of the support devices but also reduces the amount of material used, improves material utilization efficiency, and reduces manufacturing time.

[0042] Furthermore, in order to precisely control the shape of the thin-walled opening component 4, such as... Figure 1 and Figure 2 As shown, there is an equidistant gap 3 between the outer wall of the constraint unit 1 and the inner wall of the thin-walled opening member 4 in the transverse direction, and the support unit 2 is located in the gap 3.

[0043] By arranging the support units 2 in equidistant gaps 3, the design of the structural parameters of the support units 2 is facilitated, and the support effect of the support units 2 on different parts of the thin-walled open member 4 tends to be consistent, thereby achieving the expected shape control effect.

[0044] Furthermore, in order to address the problem of high support difficulty, such as Figure 3 and Figure 4 As shown, the support unit 2 includes support rods 21. Multiple support rods 21 are arranged radially along the constraint unit 1 and the thin-walled opening member 4. The bottom end of the support rod 21 is connected to the outer wall of the constraint unit 1, and the top end extends obliquely upward and is connected to the edge of the lateral opening 41. Optionally, the support rod 21 can be a cylindrical rod, a long rod, or a hollow tube.

[0045] This embodiment, by setting multiple upwardly inclined support rods 21 in the support unit 2, makes full use of the characteristic that multiple independent support rods 21 can be removed one by one. While ensuring that the constraint force of the constraint unit 1 is transmitted to the thin-walled opening member 4 in an upwardly inclined manner, it can not only flexibly arrange the support position according to the shape of the thin-walled opening member 4, but also reduce the difficulty of removing the subsequent support device and reduce the workload of the support removal process.

[0046] Furthermore, in order to reduce the localized deformation at the lateral opening 41, such as Figure 1 and Figure 3 As shown, multiple support rods 21 are evenly arranged along the edge contour of the lateral opening 41. For example, taking the edge contour of the lateral opening 41 as the array path, each support unit 2 includes a support rod array consisting of multiple support rods 21 evenly arranged, thereby supporting the edge of the lateral opening 41 through the support rod array.

[0047] This embodiment does not have special limitations on the shape of the lateral opening of the thin-walled opening member; it can be applied to rectangles, circles, trapezoids, or any polygons. In this embodiment, the support rods 21 are evenly arranged along the edge contour of the lateral opening 41. The array path of the support rods 21 can be designed according to the different shapes and sizes of the lateral opening 41, thereby providing precise shape control support for the lateral opening 41. This effectively reduces the amount of local deformation near the lateral opening 41, resulting in good shape control and high flexibility. In addition, during the support removal process, since the support rods 21 are distributed along the edge of the lateral opening 41, the removal tool can be inserted from the outside of the thin-walled opening member 4 through the lateral opening 41, making the removal process of the support device simpler and easier.

[0048] To make removing the support easier, the fusion strength set for the support device is lower than the fusion strength set for the thin-walled open member 4 when setting the additive manufacturing parameters.

[0049] For example, in the structural parameter design of the support device in this embodiment, taking the thickness of the thin-walled opening member 4 as 2mm as an example, optionally, the wall thickness of the shell 11 and the reinforcing member 12 is 0.5-1.5mm, the diameter of the reinforcing member 12 is 6-15mm, and the connection between the shell 11 and the reinforcing member 12 is transitioned with a rounded corner surface with a radius of 2-5mm. The distance 3 between the outer wall of the constraint unit 1 and the inner wall of the thin-walled opening member 4 is 10-30mm; the diameter of the support rod 21 is 0.8-2mm, and the spacing is 1-8mm; the lower end of the support rod 21 is connected to the constraint unit 1, and the upper end is connected to the thin-walled opening member 4, and the inclination angle of the center line of the support rod relative to the vertical center line of the shell 11 is 45-55°.

[0050] This embodiment takes the additive manufacturing of a rectangular cross-section thin-walled open component with an opening as an example, and compares and analyzes the support shape control effect of the existing conventional support device with the support shape control effect of the support device in this embodiment.

[0051] Figure 4 This is a schematic diagram of the dimensions of a thin-walled opening member 4 with a rectangular cross-section. The thin-walled opening member 4 has multiple rectangular lateral openings 41 for the installation, maintenance, and inspection of internal equipment. The outer wall dimensions of the thin-walled opening member 4 are 200mm long, 150mm wide, and 500mm high, with a wall thickness of 2mm. The dimensions and positions of the lateral openings 41 are shown below. Figure 4 As shown, the total volume of material used in the thin-walled open member 4 is 432 cm³. 3 The thin-walled opening component 4 and the support device are both made of titanium alloy TC4, and the additive manufacturing method is selective laser melting.

[0052] like Figure 5 As shown, the existing conventional support device includes a cover plate 5 and a rib plate 6. The cover plate 5 is used to block the lateral opening 41, and the rib plate 6 is used for structural shape control. For example, the cover plate 5 is 1 mm thick, and a 1 mm diameter weakening hole is added to the cover plate along the contour of the lateral opening 41 to facilitate breakage of the cover plate 5 along the weakening hole during removal. The rib plate 6 is perpendicular to the outer wall of the thin-walled opening member 4 and has the same height as the thin-walled opening member 4. The cross-sectional length of the rib plate 6 is 30 mm, and the thickness is 5 mm. The connection point with the thin-walled opening member 4 is thinned to 1.5 mm to reduce the difficulty of removal. The total volume of material used in this conventional support structure is 803 cm³. 3The additive manufacturing parameters used are as follows: for the thin-walled open component 4, the laser power is 300W, the scanning speed is 1250mm / s, and the border is scanned; for the support structure, the laser power is 250W, the scanning speed is 1400mm / s, and the border is not scanned. The simulation results of the deformation of the thin-walled open component using the above manufacturing parameters are analyzed, such as... Figure 6 As shown, the simulation analysis results show that only 80% of the outer wall of the thin-walled open component 4 is within ±0.5mm of the surface profile, while 20% is outside ±0.5mm.

[0053] Figures 7 to 10 This is a schematic diagram showing the dimensions and structure of the support device in this embodiment. Figure 8 and Figure 9 As shown, the gap 3 between the constraint unit 1 and the thin-walled opening member 4 is 30mm. The outer wall dimensions of the constraint unit 1 are 136mm in length, 96mm in width, and 450mm in height. The wall thickness of the shell 11 and the reinforcing member 12 is 1mm, and the diameter of the reinforcing member 12 is 10mm. Figure 9 and Figure 10 As shown, the diameter of the support rod 21 is 2mm, the angle of inclination of the centerline of the support rod 21 relative to the vertical centerline of the housing 11 is 45°, and the spacing between the support rods 21 in the support unit 2 is 4mm; the total volume of material used in the support device is 415cm³. 3 The process parameters for thin-walled open component 4 are: laser power 300W, scanning speed 1250mm / s, scanning the border; the process parameters for the support device are: laser power 250W, scanning speed 1400mm / s, not scanning the border. The simulation results of the additive manufacturing deformation of thin-walled open component 4 are as follows: Figure 11 As shown, 96% of the outer walls of the thin-walled open components 4 are within the theoretical surface profile ±0.5mm, and only 4% are outside the theoretical surface profile ±0.5mm. Compared with the shape control results of conventional support devices, the local out-of-tolerance surface is reduced by 16%. For the few local out-of-tolerance surfaces, they can be effectively treated by pre-deformation and other methods, which significantly improves the shape control effect of additive manufacturing of thin-walled open components 4.

[0054] Example 2 This embodiment discloses a support method for thin-walled open members, employing the support device for thin-walled open members from Embodiment 1, such as... Figure 12 As shown, the specific steps include: S100: Construct a model of the support device based on the structural parameters of the thin-walled open member 4; S200: Additive manufacturing of the assembly of thin-walled open member 4 and support device; S300: Remove support device.

[0055] The support method for thin-walled open components in this embodiment, by adopting the support device of Embodiment 1, effectively solves the technical problem that conventional shape-controlling support structures are difficult to adjust according to the position and shape of the lateral opening 41, and have weak shape control capability in the area near the lateral opening 41, resulting in large local surface deformation. It effectively reduces the local deformation of the thin-walled open component 4 and improves the processing accuracy of the thin-walled open component 4.

[0056] Specifically, step S100 includes the following sub-steps: S110: Construct a model of the constraint unit 1 of the support device in the inner cavity 42 of the thin-walled open member 4. The structural parameters of the constraint unit 1 are determined according to the main structural parameters of the thin-walled open member 4. S120: Construct the model of support unit 2; the support rod 21 in support unit 2 connects the shell 11 and the inner wall of the thin-walled opening member 4. The array path of the support rod 21 is determined according to the outline of the lateral opening 41, so that the support unit 2 is arranged at the edge of the lateral opening 41, thereby providing easily removable shape control support for the thin-walled opening member 4. S130: Perform additive manufacturing process simulation analysis. If the deformation of the thin-walled open component 4 exceeds the tolerance range, adjust the structural parameters of the support device and repeat steps S110 and S120 until the deformation tolerance requirements of the thin-walled open component 4 are met.

[0057] In step S100 of this embodiment, the support device of embodiment 1 is used. Since the constraint unit 1 and support unit 2 of the support device are both composed of simple geometric elements, the modeling can be completed through basic operations such as stretching, arraying, and offsetting, which reduces the difficulty of support modeling, makes the modeling process of step S100 easier to operate, improves the pre-processing efficiency of additive model, and reduces the pre-processing time of additive model machine.

[0058] In step S200 of this embodiment, since the lightweight and miniaturized support device in embodiment 1 is used, the overall structural stability of the support device can be increased and the material usage of the support device can be reduced during the additive manufacturing process of step S200, thereby improving the material utilization efficiency and reducing manufacturing time.

[0059] In this embodiment, step S300 uses a support unit 2 with multiple support rods 21 as in embodiment 1 to connect and support the thin-walled open member 4, which significantly reduces the difficulty of removing the support in step S300 and improves the overall processing efficiency.

[0060] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A support device for a thin-walled open member, characterized in that, It includes a constraint unit (1) and a support unit (2), wherein the constraint unit (1) is used to provide a constraint force to control the deformation of the additive manufacturing of the thin-walled opening member (4), and the support unit (2) is used to support the thin-walled opening member (4) and transmit the constraint force of the constraint unit (1) to the thin-walled opening member (4).

2. The support device for a thin-walled open member according to claim 1, characterized in that, The support unit (2) is located between the constraint unit (1) and the thin-walled opening member (4).

3. The support device for a thin-walled open member according to claim 2, characterized in that, The overall structure of the constraint unit (1) is cylindrical and nested with the thin-walled opening member (4).

4. The support device for a thin-walled open member according to claim 3, characterized in that, The support unit (2) includes multiple sets of support components, which are used to provide support for multiple easily deformable parts of the thin-walled open member (4).

5. The support device for a thin-walled open member according to claim 4, characterized in that, The constraint unit (1) includes a housing (11), the bottom end of which is flush with the bottom end of the thin-walled opening member (4).

6. The support device for a thin-walled open member according to claim 5, characterized in that, The thin-walled opening member (4) includes a lateral opening (41), and the height of the housing (11) is higher than the upper edge height of the highest lateral opening (41) of the thin-walled opening member (4).

7. The support device for a thin-walled open member according to claim 5, characterized in that, The constraint unit (1) further includes a reinforcing member (12), which is arranged longitudinally, and multiple reinforcing members (12) are fixed to the inner wall of the housing (11) and are evenly distributed along the circumference of the housing (11).

8. The support device for a thin-walled open member according to claim 7, characterized in that, The wall thickness of the shell (11) and the reinforcing member (12) is 0.5-0.8 times the wall thickness of the thin-walled opening member (4).

9. The support device for a thin-walled open member according to claim 7 or 8, characterized in that, The cross-sections of the thin-walled opening member (4) and the shell (11) are both square, and the reinforcing member (12) is located at a right angle to the inner wall of the shell (11).

10. A method for supporting thin-walled open members, characterized in that, The support device described in any one of claims 1 to 9 is used.

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