Box frame structure made of composite plate and metal frame and its manufacturing method

Abstract

To provide a box frame structure based on a proportioned composite structural panel, which suppresses unexpected torsional deformation and improves the stability of the precision of the entire box body, and a manufacturing method thereof. [Solution] The surface structure is made of composite structural panels, and the ridge structure is made of a metal frame, in which a reinforcing rib structure made of composite structural panels is provided. The metal frame is used to connect two adjacent composite structural panels, and has mounting grooves protruding from the sides of the metal frame, which respectively clamp both sides of the composite structural panels. An adhesive storage tank and an adhesive injection hole are provided at the joint between the metal frame and the composite structural panel, and a structural adhesive is injected into the adhesive storage tank through the adhesive injection hole to form a uniform adhesive layer.

Description

[Technical field]

[0001] The present invention relates to the technical field of machine tool structural parts, and more particularly to a box frame structure made of a composite plate and a metal frame and a manufacturing method thereof. [Background technology]

[0002] With the progress of science and technology, the requirements for the precision, stability and processing efficiency of machine tools are increasing. Traditional machine tool structural parts tend to be manufactured by welding or casting metal components such as steel and aluminum. However, the high thermal expansion coefficient and weight of metal materials limit the improvement of the precision, stability and processing efficiency of machine tool equipment. Replacing metal materials with composite materials to manufacture machine tool structural components can be considered as a technical solution. Compared with traditional metal machine tool structural components, composite material structures are obviously lighter even when meeting the same strength and rigidity requirements. Depending on the components, the weight can be reduced by 10% to 60% by replacing metal with composite materials. In addition, the excellent chemical stability and very low thermal expansion coefficient of composite materials also lead to improved precision and stability of structural components.

[0003] However, composite materials are usually anisotropic and only have good mechanical properties in certain directions. Manufacturing structural members with a single composite material is costly, the manufacturing process is complicated, and it is impossible to guarantee that the structural members have good mechanical properties in all directions. Therefore, structural members are generally manufactured by combining composite materials and metal materials, and metal materials are used to compensate for the weak mechanical properties of the composite materials in certain directions. However, the thermal expansion coefficients of composite materials and metal materials are significantly different, and when the ambient temperature changes, the uneven deformation of the composite materials and metal materials will cause large stresses in the connection structure, which may cause the connection structure to twist and deform, resulting in changes in the precision of the entire structural member. Summary of the Invention [Problem to be solved by the invention]

[0004] In order to solve the above problems existing in the prior art, a box frame structure made of composite plates and a metal frame is provided, and a manufacturing method for manufacturing the box frame structure is also provided. [Means for solving the problem]

[0005] The specific technical proposals are as follows: A box frame structure comprising a composite structural panel and a metal frame, the surface structure of the box frame structure being comprised of the composite structural panel, the ridge structure of the box frame structure being comprised of the metal frame, and a reinforcing rib structure being provided within the box frame structure, the reinforcing rib structure being comprised of the composite structural panel; The above metal frame is used to connect two adjacent composite structural panels, and there are mounting grooves protruding from the sides of the above metal frame, and these mounting grooves clamp both sides of the composite structural panels respectively, An adhesive storage tank and an adhesive injection hole are provided at the joint between the metal frame and the composite structural panel, and structural adhesive is injected into the adhesive storage tank through the adhesive injection hole to form a uniform adhesive layer.

[0006] On the other hand, the above-mentioned reinforcing rib structure includes vertical reinforcing ribs and diagonal reinforcing ribs, The vertical reinforcing ribs are provided in the box frame structure along the longitudinal direction at first predetermined intervals, and are vertically connected and fixed to the surface structure panels at corresponding positions, respectively; The diagonal reinforcing ribs are disposed between adjacent pairs of the vertical reinforcing ribs, and the diagonal reinforcing ribs are diagonally connected and fixed to the ends of the vertical reinforcing ribs, respectively, and are vertically connected and fixed to the surface structure panel at the corresponding positions; The diagonals of the adjacent pairs of oblique reinforcing ribs are arranged in different directions.

[0007] On the other hand, the composite structural panel includes a first panel, an intermediate layer, and a second panel, the first panel and the second panel being made of a fiber material, and the intermediate layer being made of a honeycomb material; Metal-embedded parts (pre-embedded metal parts) are provided at predetermined positions in the intermediate layer, The first panel, the second panel, and the intermediate layer are held together with a structural adhesive.

[0008] On the other hand, the above fiber material is a carbon fiber-resin composite material, The carbon fiber-resin composite material includes a plurality of layers of carbon fiber cloth and a resin material bonded between the carbon fiber cloths, The inverse thermal expansion coefficient of the multi-layered carbon fiber cloth is the same as the thermal expansion coefficient of the resin material.

[0009] On the other hand, the honeycomb material is a metal material, and the honeycomb holes of the honeycomb material are arranged perpendicular to the first panel and the second panel; The first panel and the second panel have negative thermal expansion, and the composite structural panel has a zero coefficient of thermal expansion through its thickness.

[0010] On the other hand, the predetermined position is a position where the composite structural panel is subjected to an external load; The first panel and the second panel are provided with mounting holes in areas corresponding to the predetermined positions, and a positioning device of an external structure is connected and fixed to the metal embedded part through the mounting holes and the first panel and the second panel; The above-mentioned external structure includes the above-mentioned metal frame and the equipment guide rail.

[0011] On the other hand, the cross section of the metal frame is L-shaped, and the mounting groove includes a first mounting groove and a second mounting groove; The first mounting groove and the second mounting groove are disposed perpendicular to each other.

[0012] On the other hand, the above metal frame: a main frame having a long cubic shape and a first mounting groove and a second mounting groove on a first side and a second side, respectively; An external structure is connected to the side of the main frame.

[0013] Meanwhile, the metal frame is installed at the outer corner formed by two adjacent composite structural panels, or said metal frame is installed at an interior angle formed by two adjacent said composite structural panels; Alternatively, the composite structural panels are T-shaped, and when stacked, the metal frames are respectively installed at the corners on both sides of the composite structural panels.

[0014] A method for manufacturing the box frame structure for manufacturing the above box frame structure, the method comprising the steps of: A structural adhesive is evenly applied to the joint between the composite structural panel and the metal frame, and the composite structural panel is inserted into the predetermined mounting position of the metal frame to obtain a predetermined box frame structure by assembling the composite structural panel and the metal frame. In order to ensure that the structural adhesive forms a uniform adhesive layer in the adhesive storage tank, the structural adhesive is injected into the adhesive injection holes of the metal frames respectively until the structural adhesive overflows from the adhesive injection holes. Effect of the Invention

[0015] The above technical solutions have the following beneficial effects: The box structure is adopted, and the surface structure of the box body is made of composite high-oz panel, which maximizes the excellent in-plane rigidity and in-plane strength of the composite structural panel, while the thermal deformation of the composite material is very small, so that the thermal stability of the surface structure is ensured. The ridge structure of the box body is adopted metal frame, which mainly expands and deforms along the length of the box body due to thermal expansion, but the deformation in the other two directions is very small, so that the overall unexpected torsional deformation of the box structure is not caused, and the stability of the overall precision is improved.

[0016] The connection between the composite structural panel and the metal frame is made by using a double-sided adhesive bonding method, which not only enhances the rigidity and strength of the connection, but also makes the thermal expansion of the metal symmetrical with respect to the composite structural panel, so as not to affect the geometric position of the composite structural panel and not to cause thermal deformation of the composite structural panel, thereby ensuring the precision and stability of the entire box structure.

[0017] Composite structural panels can be produced in batches using resin transfer molding (RTM) technology and molding methods, and metal frame structures are also readily available through methods such as extrusion and welding, making them easier to manufacture compared to using a single composite material. [Brief description of the drawings]

[0018] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings, which are provided for the purposes of illustration and description only and are not intended to limit the scope of the present invention. [Figure 1] FIG. 1 is an overall schematic diagram according to one embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic diagram of a portion according to one embodiment of the present invention. [Diagram 3] FIG. 3 is a schematic diagram of a composite structural panel according to one embodiment of the present invention. [Figure 4] FIG. 4 is a schematic diagram of a reinforcing rib structure according to one embodiment of the present invention. [Diagram 5] FIG. 5 is a schematic diagram of a connection according to one embodiment of the present invention. [Figure 6] FIG. 6 is a schematic diagram of a mainframe according to one embodiment of the present invention. [Figure 7] FIG. 7 is a schematic diagram of a manufacturing method according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] The technical solutions in the embodiments are described below clearly and completely with reference to the accompanying drawings. Obviously, the embodiments described below are only a part, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0020] In the present invention, the orientations and positional relationships indicated by terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial direction," "radial direction," and "circumferential direction" are based on the orientations and positional relationships shown in the drawings, and are intended to simplify the description of the present invention, and do not imply that the described devices and parts must have a specific orientation, be constructed in a specific orientation, and be operated in a specific orientation, and should not be construed as limiting the present invention.

[0021] In the present invention, unless otherwise expressly specified or limited, the terms "installation", "mounting", "connection", "coupling", "fixed" and the like should be understood in a broad sense. For example, they may be fixedly connected or detachably connected. They may be mechanically connected, directly connected, or indirectly connected via an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific situation.

[0022] It should be noted that, unless contradictory, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, which are not intended to be limiting of the present invention.

[0023] In the present invention, as shown in Figs. 1 and 2, a box frame structure is provided, in which the surface structure of the box frame structure is composed of a composite structural panel 1, the ridge structure of the box frame structure is composed of a metal frame 3, and a reinforcing rib structure 2 is provided in the box frame structure, and the reinforcing rib structure is composed of a composite structural panel 1 or a composite reinforced panel; The metal frame 3 is used to connect two adjacent composite structural panels 1, and has mounting grooves protruding from the sides of the metal frame 3, which clamp both sides of the composite structural panels 1 respectively.

[0024] When assembling the metal frame 3 and the composite structural panel 1, the structural adhesive 4 is injected into the adhesive storage tank 6 through the adhesive injection hole 5, and the adhesive storage tank 6 distributes the structural adhesive 4 evenly throughout the joint between the metal frame 3 and the composite structural panel 1, where it hardens.

[0025] Specifically, in the existing technology, the thermal expansion coefficients of the composite material and the metal parts are not consistent, which causes similar structural parts to be affected by temperature, resulting in distortion and deformation of the connection structure, resulting in a problem of reduced stability of the precision of the structure. In contrast, in the present solution, when the composite structural panel is connected to the metal frame, it is in contact with both sides, resulting in a symmetrical structure when viewed from the thickness direction of the composite structural panel. Therefore, even if the temperature of the material changes, the expansion of the structural adhesive and the metal frame is symmetrical along the thickness direction of the composite structural panel, so that the position of the composite structural panel relative to the metal frame does not change, and the surface structure of the entire box frame is not affected by temperature changes, which greatly improves the stability of the precision of the entire frame structure.

[0026] Specifically, as shown in FIG. 1, the composite structural panel 1 in this solution includes composite structural panel 1-a, composite structural panel 1-b, composite structural panel 1-c, and composite structural panel 1-d, which form a long hollow rectangular tubular structure and are used as columns, rods, etc. to bear structural loads in the subsequent manufacturing of frame structures.

[0027] At the folded corners of adjacent composite structural panels 1, for example at the folded corners of composite structural panels 1-b and 1-c, a metal frame 3-c is provided, which is used to encase and connect the corners formed by composite structural panels 1-b and 1-c.

[0028] Similarly, a metal frame 3-a is provided between composite material structural panel 1-a and composite material structural panel 1-d, a metal frame 3-b is provided between composite material structural panel 1-b and composite material structural panel 1-a, and a metal frame 3-d is provided between composite material structural panel 1-c and composite material structural panel 1-d.

[0029] Conventional mechanical connection methods require drilling holes at the connection points, but there is a problem that stress is concentrated at the holes, affecting strength. In this embodiment, a method is adopted in which the metal frame 3 and the composite material structural panel 1 are bonded and fixed using an adhesive, thereby avoiding the problem of stress damage caused by drilling holes.

[0030] However, in the bonding process, the traditional method of applying structural adhesive to the surface of the workpieces and then joining the workpieces has a problem that the structural adhesive is easy to flow and unevenly distributed, which results in a decrease in adhesive strength. To address this problem, the present embodiment provides multiple adhesive injection holes 5 on the metal frame 3 and designs an adhesive storage tank 6 on the side close to the composite structural panel 1, so that the structural adhesive 4 is uniformly distributed at the joint between the metal frame 3 and the composite structural panel 1 through the adhesive storage tank 6, and then solidifies to form a uniform adhesive layer.

[0031] Here, the adhesive storage tank 6 is used to fill the gap formed between the metal frame 3 and the composite structural panel 1. The structural adhesive 4 flows into the adhesive storage tank 6 through the adhesive injection hole 5 and distributes within the adhesive storage tank 6 to form an adhesive layer. By controlling the depth of the adhesive storage tank 6, the type of structural adhesive 4, and the adhesive injection pressure, a relatively uniform adhesive layer can be formed within the adhesive storage tank 6 to achieve a strong bond.

[0032] In addition, the adhesive storage tank 6 may have a shape with a specific distribution formed by processing the surface of the metal frame 3. For example, in one embodiment, the adhesive injection holes 5 are evenly arranged at specific intervals along the longitudinal direction of the metal frame 3, and the dendritic adhesive storage tank 6 is designed on the back to communicate with the adhesive injection holes 5. After the structural adhesive 4 is injected into the adhesive storage tank 6, the structural adhesive 4 spreads evenly at the interface along the dendritic distribution under the action of pressure, forming a uniformly distributed adhesive layer, thereby achieving a better bonding effect. According to the embodiment, the adhesive storage tank 6 may be arranged in a matrix shape, a snowflake shape, a mesh shape, etc.

[0033] The structural adhesive 4 is a liquid or semi-liquid adhesive used to fasten the metal frame 3 and the composite structural panel 1. Depending on the embodiment, it can be a structural adhesive, an epoxy resin adhesive, or other equivalent adhesive. It can harden naturally at room temperature or after baking.

[0034] The metal frame 3 is a metal structure with corners that can fix the composite structural panel 1 and reinforce the stress, and its cross section has a C-shape, L-shape, or other angle. It is necessary to explain that the metal frame 3 can be attached to the outer corners of the composite structural panel 1-a and the composite structural panel 1-d shown in the figure, and can also be glued to the inner corners of the composite structural panel 1-a and the composite structural panel 1-d, and depending on the joint, the adhesive storage tank 6 can be adjusted to different surfaces facing the composite structural panel 1 and positioned toward the composite structural panel 1.

[0035] In one embodiment, the box frame structure further includes a plurality of reinforcing rib structures 2, The reinforcing rib structure 2 includes a vertical reinforcing rib 2-a and an oblique reinforcing rib 2-b, The longitudinal reinforcing ribs 2-a are distributed along the longitudinal axis direction of the box frame structure at a first preset interval, and are respectively connected and fixed vertically to the composite material structural panel 1 as the surface structural panel; The diagonal reinforcing rib is disposed between a pair of adjacent vertical reinforcing ribs and is fixedly connected diagonally to the ends of the vertical reinforcing ribs; A pair of adjacent diagonal reinforcing ribs 2-b have different directions, and the vertical reinforcing rib 2-a and the diagonal reinforcing rib 2-b are fixed to the composite material structural panel 1 via a metal frame 3.

[0036] The diagonal reinforcing ribs 2-b are fixed diagonally to the ends of the vertical reinforcing ribs 2-a, and are connected and fixed vertically to the composite material structural panel 1 as the surface structural panel at the corresponding position; Specifically, in order to achieve better structural strength, in this embodiment, multiple reinforcing rib structures 2 including vertical reinforcing ribs 2-a and diagonal reinforcing ribs 2-b are further provided in the box frame structure to reinforce the internal structural strength.

[0037] In it, the vertical reinforcing ribs 2-a are distributed along the longitudinal direction of the box frame structure at a first preset interval, and their ends are respectively set perpendicular to the composite structural panel 1. Then, a metal frame 3 corresponding to the joint between the ends of the vertical reinforcing ribs 2-a and the composite structural panel 1 is installed, and the adhesive is injected and cured according to the above process, thereby realizing a better mechanical conduction structure, better distributing the stress in the minor axis direction, and improving the bending resistance of the entire structure.

[0038] Specifically, in the frame structure shown in FIG. 1, the metal frame 3 that fixes the vertical reinforcing rib 2-a includes a metal frame 3-e and a metal frame 3-f. In this embodiment, in order to further improve the compression resistance of the cylindrical structure, a pair of adjacent vertical reinforcing ribs 2-a and a diagonal reinforcing rib 2-b are provided in the diagonal direction. This allows force to be transmitted through the diagonal reinforcing rib 2-a, and the compression resistance of the frame structure can be improved. Among them, both upper and lower ends of the diagonal reinforcing rib 2-b are connected to the vertical reinforcing rib 2-a, and both ends of the side are connected to the composite material structural panel 1. Similarly, the ends are wrapped in a metal frame 3 including a metal frame 3-h and a metal frame 3-g, and fixed by injecting an adhesive.

[0039] In one embodiment, the reinforcing rib structure 2 is a carbon fiber panel. In one embodiment, the composite structural panel 1 and the reinforcing rib structure 2 are the same composite structural panel 1 .

[0040] The three-ply panel includes a first panel and a second panel on both upper and lower sides, with at least one intermediate layer between the first panel and the second panel. The first panel, the second panel, and the intermediate layer can be secured together using an adhesive.

[0041] Specifically, in order to achieve a better replacement for traditional metal materials, an improvement is made to the composite structural panel 1 in this embodiment. As shown in Fig. 3, the composite structural panel 1 includes, from top to bottom, a first panel, a second panel, and an intermediate layer. In one embodiment, the first panel and the second panel are made of fiber material, and the intermediate layer is an aluminum honeycomb panel, so that the composite structural panel 1 is composed of a carbon fiber panel 101, an aluminum honeycomb panel 103 as a sandwich layer, and a carbon fiber panel 104.

[0042] The layers are joined together by applying an adhesive, and bonding methods include applying a structural adhesive and allowing it to air dry or curing it with heat. Furthermore, in order to achieve a better reinforcing effect, a pair of embedded parts (pre-embedded parts) 102, 104 are embedded near the corners of the composite material structural panel 1 during subsequent assembly, thereby improving the local strength of the panel.

[0043] In other embodiments, the position of the embedded parts is also changed. For example, if a guide rail is provided on the composite structural panel 1 on one side of the box frame structure, one or more embedded parts can be provided only in the area corresponding to the guide rail on the composite structural panel 1, and the direction of the embedded parts can be parallel to or cross the guide rail.

[0044] In addition, when the composite structural panel 1 is fixedly connected to the external guide rail, the predetermined position is set to the guide rail connection position; The guide rail mounting portion of the external guide rail is inserted into the embedded part and fixed.

[0045] In this embodiment, since the composite material structural panel 1 itself is a composite material, if the connection position between the composite material structural panel 1 and the guide rail is fixed with a bolt or the like, a large shear force is likely to occur there, which will destroy the structure of the fiber material. In response to this, an embedded part can be inserted in advance into the intermediate layer at the position where the external guide rail is to be attached, and an attachment hole can be opened. Next, when the external guide rail is attached, the guide rail attachment part of the external guide rail penetrates and is fixed into the embedded part, thereby avoiding damage to the fiber material of the panel.

[0046] Similarly, as shown in FIG. 4, the reinforcing rib structure 2 can also be provided with a carbon fiber panel 201, an aluminum honeycomb panel 202 as an intermediate layer, and a carbon fiber panel 203 bonded in sequence to achieve better structural reinforcement.

[0047] In one embodiment, the fiber material is a carbon fiber-resin composite; Carbon fiber-resin composite materials include multiple layers of carbon fiber cloth and a resin material bonded between the carbon fiber cloths.

[0048] The negative thermal expansion coefficient of the multi-layer carbon fiber cloth is the same as that of the resin material. Specifically, in this embodiment, in order to control the thermal expansion coefficient of the composite material structural panel 1, the fiber material is adjusted so that the carbon fiber cloth and the resin material impregnated therein are set to a predetermined number of layers. Because the carbon fiber cloth itself has a negative thermal expansion coefficient, the negative thermal expansion coefficient of the multi-layered carbon fiber cloth becomes the same as the thermal expansion coefficient of the resin material, and thus the thermal expansion coefficient of the entire fiber material becomes zero. By selecting the number and orientation of the carbon fiber cloth layers and adjusting the proportion of the resin material in the fiber panel, the thermal stability of the structure is improved.

[0049] In one embodiment, the honeycomb material is a metal material, and the honeycomb holes of the honeycomb material are disposed perpendicular to the first panel and the second panel; A composite structural panel in which the first and second panels have a negative coefficient of thermal expansion has a coefficient of thermal expansion of zero through the thickness.

[0050] Specifically, in order to achieve better thermal stability of the entire composite material, in this embodiment, the honeycomb holes are arranged perpendicular to the first panel and the second panel, and at the same time, the proportion of resin material is controlled so that the first panel and the second panel themselves have negative thermal expansion coefficients, and the tension of the fiber panel is used to offset the height expansion of the honeycomb material, thereby achieving thermal stability of the frame.

[0051] In one embodiment, the metal frame 3 includes a first plane and a second plane that are arranged on the outside and are bonded to the composite structural panel 1, respectively, and a row of first mounting holes 7 is drilled in the first plane and the second plane, respectively; The adhesive injection hole 7 is closer to the corner of the metal structural member than the first mounting hole 7; The composite material structural panel 1 is provided with a second mounting hole at a position corresponding to the first mounting hole, When the composite structural panel 1 is assembled to the metal frame 3, the first mounting hole and the second mounting hole are connected.

[0052] Specifically, in order to achieve a better mounting effect, in this embodiment, a row of first mounting holes 7 is drilled in the first plane and the second plane of the metal frame 3, and second mounting holes are drilled at positions corresponding to the first mounting holes in the composite structural panel 1.

[0053] When it is necessary to assemble the composite structural panel 1 and the metal frame 3, the first mounting hole 7 and the second mounting hole are aligned in advance, and then the composite structural panel 1 and the metal frame 3 are connected, and then adhesive is injected and subjected to a curing process.

[0054] The above arrangement allows the composite structural panel 1 and the metal frame 3 to be accurately aligned, and the alignment device is used to apply pre-pressure to both, promoting the formation of a uniform adhesive layer.

[0055] In the above process, since the first mounting hole 7 is closer to the outside of the metal frame 3 than the adhesive injection hole 7, the alignment device can apply a certain pressure to the outside of the edge after installation, which makes it easier for the structural adhesive in the adhesive storage tank to bond the composite structural panel 1 and the metal frame 3.

[0056] Similarly, when the reinforcing rib structure 2 is combined with the metal frame 3, the first mounting hole and the second mounting hole are also connected through the alignment device and fixed with adhesive.

[0057] Specifically, when installing, based on the above design, the metal structural parts have the following installation methods: The metal frame 3 is located at the outer corner formed by two adjacent composite structural panels 1; Alternatively, the metal frame 3 is arranged in an interior angle formed by two adjacent composite structural panels 1, Alternatively, when the composite structural panels 1 are stacked in a T-shape, metal frames 3 are disposed at the angles on both sides of the composite structural panel 1, respectively. The above settings will give you better installation results.

[0058] In one embodiment, as shown in FIG. 5, when two adjacent composite structural panels 1 form a corner, the L-shaped metal frame 3 is clamped at the inner corner and the outer corner of the composite structural panels 1, respectively, and clamps both sides of each composite structural panel 1 through the first mounting groove and the second mounting groove.

[0059] Further, a connecting portion 31 is provided in the center of the metal frame 3, passing through the gap between adjacent composite structural panels 1 and connecting the metal frames 3 on both the inner and outer sides. Specifically, in order to achieve better structural strength, in this embodiment, when the composite structural panel 1 forms a corner, the metal frames 3 are respectively installed on the inside and outside of the corner of the composite structural panel 1 to achieve fixed connection on both sides. In this embodiment, in order to further improve structural strength, a connecting portion 31 can be provided between the gaps between the adjacent composite structural panels 1 to connect the metal frames 3 on both the inside and outside.

[0060] In one embodiment, the metal frame 3 can have the first and second mounting grooves formed at one time by a process such as injection, aluminum extrusion, and the like.

[0061] In one embodiment, as shown in FIG. 6, the metal frame 3 is A main frame 32 having a rectangular parallelepiped shape; At least one mounting groove 33 is disposed on a side of the main frame, is U-shaped, and includes a first mounting groove and a second mounting groove for fixing a composite structural panel; Including, Shown in the figures is an embodiment with two mounting grooves 33, but multiple side grooves could be provided if desired.

[0062] The mounting groove is provided with a first mounting hole for accessing the alignment device and fixing the alignment device by injecting an adhesive, an adhesive storage tank, and an adhesive injection hole at positions corresponding to the first mounting hole. Specifically, in order to obtain better connection strength, in this embodiment, the metal frame 3 is also provided with a metallic rectangular parallelepiped main frame 32, and U-shaped mounting grooves 33 are provided on both sides of the main frame 32. During installation, the composite material structural panel 1 is inserted into the mounting grooves 33, and adhesive is injected through the adhesive injection hole to fix it, and then passed through the alignment device to the embedded parts to fix it. On this basis, the main frame 32 can also be connected to external guide rails.

[0063] The manufacturing method of the box frame structure used to manufacture the above box frame structure is as shown in FIG. A structural adhesive is uniformly applied to the joint position between the composite structural panel and the metal frame, and then inserted into the predetermined mounting position in the metal frame, thereby obtaining a predetermined box frame; In order to ensure that the structural adhesive forms a uniform adhesive layer in the adhesive storage tank, the structural adhesive is injected into the adhesive injection holes of the metal frames respectively until the structural adhesive overflows from the adhesive injection holes.

[0064] Specifically, in order to achieve better production efficiency, in this embodiment, the above-mentioned manufacturing method is designed and used to manufacture the box frame structure. Specifically, according to the parameters of the pre-designed box frame structure, mainly including the standard dimensions of length x width, the composite structural panels and metal structural components of the corresponding length can be selected, and when the reinforcing rib structure is installed as needed, the dimensions of the corresponding reinforcing rib structure can be easily designed.

[0065] The composite structural panels, the metal structural components, and the reinforcing rib structures are cut based on the dimensional data, and then the composite structural panels are inserted into the predetermined mounting positions of the metal structural components to assemble a pre-bonded frame that meets the design requirements.

[0066] Then, the structural adhesive is injected into the adhesive injection hole of the metal structural component, and if necessary, a certain pressure can be maintained during the injection process, until the adhesive storage tank of the metal structural component is filled with the structural adhesive. If necessary, the air in the adhesive storage tank is removed in a vacuum environment, so that the structural adhesive can be uniformly distributed in the adhesive storage tank and the air bubbles in the adhesive layer can be reduced.

[0067] Finally, the structural adhesive is cured to form the box frame structure. The curing method can be either at room temperature or by baking, depending on the type of structural adhesive.

[0068] In one embodiment, the method further comprises securing the composite structural panel using a positioning device after the composite structural panel is inserted into the predetermined mounting position. Similarly, in order to achieve better installation accuracy, in this embodiment, after the composite structural panel is inserted into the predetermined mounting position, the second mounting screw hole of the composite structural panel is aligned with the first mounting screw hole of the metal structural member, and then the positioning device is used to fix it, and then the adhesive is injected and cured to fix it, thereby achieving a better fixing effect.

[0069] Specifically, in existing machine tools, machining centers, etc., a processing device such as a spindle or a milling cutter is usually installed above a processing table to process a workpiece. At the same time, in order to process a workpiece with a larger area, the processing device can be lifted in the form of a gantry to facilitate the movement of the processing device during processing.

[0070] Generally, in order to achieve light weight and high load, the gantry structure is formed by combining multiple rod-shaped parts to form a corresponding frame structure. For example, the truss structure commonly seen in cranes and factories is divided into vertical beams, horizontal beams, and diagonal beams according to their functions. Among them, the rod-shaped parts can be replaced with the above-mentioned box frame structure, and by replacing it with the above-mentioned box frame structure, the overall weight can be reduced.

[0071] Of these, the rod-shaped parts can be replaced with the box frame structure mentioned above, and by replacing the existing metal crossbars, the overall weight can be reduced. The above is merely a preferred embodiment of the present invention, and is not intended to limit the implementation and protection scope of the present invention. Those skilled in the art should recognize that solutions obtained by equivalent replacement and obvious changes using the description and drawings should be included in the protection scope of the present invention.

Claims

1. A box frame structure comprising a composite structural panel and a metal frame, a surface structure of the box frame structure being comprised of the composite structural panel, a ridge structure of the box frame structure being comprised of the metal frame, and a reinforcing rib structure being provided within the box frame structure, the reinforcing rib structure being comprised of the composite structural panel; The metal frame is used to connect two adjacent composite structural panels, and there are a number of mounting grooves on the side of the metal frame, and the mounting grooves clamp both sides of the composite structural panels respectively; A box frame structure characterized in that an adhesive storage tank and an adhesive injection hole are provided at the joint between the metal frame and the composite material structural panel, and a structural adhesive is injected into the adhesive storage tank through the adhesive injection hole to form a uniform adhesive layer.

2. The reinforcing rib structure includes a plurality of vertical reinforcing ribs and a plurality of diagonal reinforcing ribs, The plurality of vertical reinforcing ribs are provided in the box frame structure along the longitudinal direction of the box frame structure at a first predetermined interval between adjacent pairs of vertical reinforcing ribs, and are vertically connected and fixed to the surface structure panels at corresponding positions, The plurality of diagonal reinforcing ribs are disposed between the pair of adjacent vertical reinforcing ribs, and the plurality of diagonal reinforcing ribs are diagonally connected and fixed to the ends of the vertical reinforcing ribs, and are vertically connected and fixed to the surface structure panel at corresponding positions; The box frame structure according to claim 1 , wherein the diagonals of adjacent pairs of the diagonal reinforcing ribs are set in different directions.

3. the composite structural panel includes a first panel, an intermediate layer, and a second panel, the first panel and the second panel being made of a fibrous material, and the intermediate layer being made of a honeycomb material; A metal embedded part is provided at a predetermined position of the intermediate layer, 2. The box frame structure of claim 1, wherein the first panel, the second panel, and the interlayer are held together by the structural adhesive.

4. the fiber material is a carbon fiber-resin composite material, The carbon fiber-resin composite material includes a plurality of layers of carbon fiber cloth and a resin material bonded between the carbon fiber cloths; 4. The box frame structure of claim 3, wherein the negative coefficient of thermal expansion of the carbon fiber cloth of the multiple layers is the same as the coefficient of thermal expansion of the resin material.

5. the honeycomb material is a metallic material, the honeycomb holes of the honeycomb material are disposed perpendicular to the first panel and the second panel; 4. The box frame structure of claim 3, wherein said first panel and said second panel have negative thermal expansion, and said composite structural panel has a zero coefficient of thermal expansion through its thickness.

6. the predetermined position is a position where the composite structural panel is subjected to an external load; The first panel and the second panel are provided with mounting holes in areas corresponding to the predetermined positions, and a positioning device of an external structure is connected and fixed to the metal-embedded component through the mounting holes and the first panel and the second panel; The box frame structure according to claim 3 , wherein the external structure includes the metal frame and an equipment guide rail.

7. The cross section of the metal frame is L-shaped, and the plurality of mounting grooves include a first mounting groove and a second mounting groove; The box frame structure according to claim 1 , wherein the first mounting groove and the second mounting groove are installed vertically.

8. The metal frame is a main frame having a long cubic shape, the main frame having a first mounting groove and a second mounting groove on a first side and a second side, respectively; The box frame structure of claim 1 , wherein an exterior structure is connected to a side of the main frame.

9. the metal frame is installed at an exterior corner formed by two adjacent composite structural panels; Alternatively, the metal frame is installed at an interior angle formed by two adjacent composite structural panels, Alternatively, the composite structural panels are T-shaped, and when stacked, the metal frames are installed at the corners on both sides of the composite structural panels, respectively.

10. 2. A method for manufacturing a box frame structure according to claim 1, comprising the steps of: The structural adhesive is uniformly applied to the joint between the composite material structural panel and the metal frame, and the composite material structural panel is inserted into a predetermined mounting position of the metal frame to obtain a predetermined box frame structure by assembling the composite material structural panel and the metal frame. A method for manufacturing a box frame structure, characterized in that the structural adhesive is injected into each of the adhesive injection holes of the metal frame until the structural adhesive overflows from the adhesive injection holes, to ensure that the structural adhesive forms a uniform adhesive layer in the adhesive storage tank.

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