Metal rolled C-shaped perforated plate beam and manufacturing method thereof

Abstract

The invention relates to the technical field of machining of metal building components, and discloses a metal rolled C-shaped porous plate girder and a manufacturing method thereof.The manufacturing method comprises the steps that according to the size and the needed structural strength of a formed C-shaped plate girder body, the design size and the design position of lightening holes and connecting holes are determined; calendaring the metal plate into a C-shaped plate girder body; and according to the design sizes and the design positions of the lightening holes and the connection holes, the lightening holes and the connection holes are machined and formed in the plate girder body. Before a metal plate is machined, the size and the position of a hole are subjected to optimization design, then hole machining is conducted according to the design size and the design position, and the cost of structure optimization design is saved; during trepanning, stamping or punching forming can be adopted, a plurality of trepanning bodies can be machined at a time, the machining cost is reduced, and the efficiency is improved; the ceiling load can be effectively reduced, and the problem that ceiling ventilation is hindered by the beam height is solved; and the process pipeline in the suspended ceiling can freely penetrate through the lightening holes, and the degree of freedom of wiring is high.

Description

Technical Field

[0001] The present invention relates to the technical field of processing metal building components. More specifically, the present invention relates to a metal rolled C-shaped porous plate beam and a manufacturing method thereof. Background Art

[0002] Metal C-shaped beams are widely used in construction and engineering, mainly for load-bearing and structural support. For example, they can be used as ceiling keels, load-bearing beams, strengthening beams in metal-structured houses and modular clean rooms, and load-bearing keels or beams for mezzanine ceilings. Therefore, metal C-shaped beams need to have a certain structural strength.

[0003] When applied in modular clean rooms, modular clean rooms are assembled clean rooms that can provide a highly clean production or research space for a specific environment. When constructing, it is necessary to consider the ventilation of the ceiling, the routing of process pipelines in the ceiling, the convenience of installing C-shaped beams, and the requirement of lightweight. In order to simultaneously meet the requirements for the structure of metal C-shaped beams and their structural strength during construction, it is particularly important to process metal C-shaped beams and optimize their structures. At the same time, the costs of the processing process and the structural optimization process also need to be considered.

[0004] Therefore, it is necessary to propose a metal rolled C-shaped porous plate beam and a manufacturing method thereof to at least partially solve the problems existing in the prior art. Summary of the Invention

[0005] A series of simplified concepts are introduced in the Summary of the Invention section, which will be further detailed in the Detailed Description section. The Summary of the Invention section of the present invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the protection scope of the claimed technical solution.

[0006] To at least partially solve the above problems, the present invention provides a manufacturing method of a metal rolled C-shaped porous plate beam, including: Determining the design dimensions and design positions of the weight-reducing holes and connection holes according to the dimensions and required structural strength of the formed C-shaped plate beam body; Rolling a metal plate into a C-shaped plate beam body; Processing weight-reducing holes and connection holes on the plate beam body according to the design dimensions and design positions of the weight-reducing holes and connection holes.

[0007] Preferably, the centers of two adjacent weight-reducing holes are separated by a first distance, and the centers of two adjacent connection holes are separated by a second distance.

[0008] Preferably, the determination of the design dimensions and design positions of the weight-reducing holes and connection holes includes: Determine the initial size of the weight-reducing holes, and determine the initial size of the connection holes based on the initial size of the weight-reducing holes and the size of the side plates; Determine the relative positions of the weight-reducing holes and the connection holes such that the projection of the normal line of the middle plate passing through the center of the weight-reducing hole on the side plate passes through the center of the connection hole, and determine the initial values of the first distance and the second distance such that the first distance is an integer multiple of the second distance; Adjust the initial values of the first distance and the second distance and the initial sizes of the weight-reducing holes and the connection holes to obtain the design sizes and design positions of the weight-reducing holes and the connection holes when the weight of the formed C-shaped plate beam body is minimized and its structural strength is maximized.

[0009] Preferably, the initial size of the weight-reducing holes is determined based on a first set ratio, a second set ratio, and a third set ratio; The ratio of the height of the weight-reducing hole to the width of the middle plate of the plate beam body satisfies the first set ratio, the ratio of the length of the lower bottom edge of the weight-reducing hole to the height of the weight-reducing hole satisfies the second set ratio, and the ratio of the length of the lower bottom edge of the weight-reducing hole to the length of the upper bottom edge of the weight-reducing hole satisfies the third set ratio.

[0010] Preferably, adjusting the initial values of the first distance and the second distance and the initial sizes of the weight-reducing holes and the connection holes includes: Obtain the initial shapes of a plurality of plate beam bodies; wherein, the shapes of different plate beam bodies differ in the shape of the weight-reducing holes; Conduct a structural strength simulation analysis of the actual working conditions for the initial shapes of all the plate beam bodies to obtain the deformation amount of the middle plate of each plate beam body, and select the optimal shape of the plate beam body based on the minimum deformation amount; Optimize the optimal shape of the plate beam body with respect to the first set ratio, the first distance, the second distance, and the size of the connection holes. The optimization goal is to minimize the weight of the plate beam body without reducing its structural strength, so as to obtain the optimal matching scheme of the first distance, the second distance, and the sizes of the weight-reducing holes and the connection holes on the formed C-shaped plate beam body.

[0011] The present invention also provides a metal-rolled C-shaped porous plate beam, including: a plate beam body rolled into a C shape, on which a plurality of weight-reducing holes are distributed along the length direction of its middle plate, and the centers of two adjacent weight-reducing holes are separated by a first distance; a plurality of connection holes are distributed along the length direction of the two side plates of the plate beam body, and the centers of two adjacent connection holes are separated by a second distance.

[0012] Preferably, the first distance is an integer multiple of the second distance.

[0013] Preferably, the projection of the normal line of the middle plate passing through the center of the weight-reducing hole on the side plate passes through the center of the connection hole.

[0014] Preferably, the weight-reducing holes are trapezoidal holes, and two adjacent sides of two adjacent trapezoidal holes are arranged in parallel; The ratio of the height of the weight-reducing hole to the width of the middle plate satisfies a first set ratio, the ratio of the length of the lower bottom side of the weight-reducing hole to the height of the weight-reducing hole satisfies a second set ratio, and the ratio of the length of the lower bottom side of the weight-reducing hole to the length of the upper bottom side of the weight-reducing hole satisfies a third set ratio.

[0015] Preferably, the range of the first set ratio is 0.5 to 0.625, the range of the second set ratio is 2 to 2.2, and the range of the third set ratio is 2.5 to 4; The length of the connecting hole is less than the length of the upper bottom side of the weight-reducing hole, and the ratio of the width of the connecting hole to the width of the side plate is 0.25 to 0.3.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: For the metal rolling C-shaped porous plate beam and its manufacturing method of the present invention, before processing the metal plate, the dimensions and positions of the weight-reducing holes and the connecting holes can be optimized and designed first, and then the obtained design dimensions and design positions are used to perform hole-opening processing on the plate beam body, so that it is not necessary to actually manufacture the plate beam body and then perform structural optimization, saving the cost of structural optimization design; in addition, when performing hole-opening, stamping or punching can be used, and multiple holes can be processed at one time, reducing the processing cost and improving the production efficiency; Other components can be connected by screws above and below the plate beam body through the connecting holes on the side plates. The weight-reducing holes provided on the middle plate can reduce the weight of the plate beam body on the premise of ensuring its structural strength, effectively reducing the ceiling load and leaving a margin for other functional loads on the ceiling; in addition, multiple weight-reducing holes facilitate the free flow of air in the completed ceiling or the sandwich, effectively solving the problem of the beam height hindering the ventilation of the ceiling; when the process pipelines such as wind, water, and electricity in the ceiling are routed, they can freely pass through the weight-reducing holes, and the degree of freedom of wiring is high, without the need to additionally occupy the space of the ceiling.

[0017] For the metal rolling C-shaped porous plate beam and its manufacturing method of the present invention, other advantages, objectives, and features of the present invention will be partially reflected by the following description, and partially will also be understood by those skilled in the art through the research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention. In the drawings: Figure 1 is a three-dimensional structural schematic diagram of the metal rolling C-shaped porous plate beam of the present invention; Figure 2Schematic side view of the metal rolled C-shaped porous plate beam according to the present invention; Figure 3 Schematic view of the middle plate in the metal rolled C-shaped porous plate beam according to the present invention; Figure 4 Schematic view of the weight-reducing holes in the metal rolled C-shaped porous plate beam according to the present invention; Figure 5 Schematic view of the connection holes in the metal rolled C-shaped porous plate beam according to the present invention; Figure 6 Flow chart of the manufacturing method of the metal rolled C-shaped porous plate beam according to the present invention; Figure 7 Specific flow chart of step S1 in the manufacturing method of the metal rolled C-shaped porous plate beam according to the present invention; Figure 8 Specific flow chart of step S13 in the manufacturing method of the metal rolled C-shaped porous plate beam according to the present invention. Detailed implementation manners

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it according to the description in the specification.

[0020] It should be understood that the terms such as "having", "comprising" and "including" used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0021] As Figure 1 shown, the present invention provides a metal rolled C-shaped porous plate beam, including: a plate beam body 1 rolled into a C shape, on which a plurality of weight-reducing holes 4 are distributed along the length direction of the middle plate 2, and the centers of two adjacent weight-reducing holes 4 are separated by a first distance; a plurality of connection holes 5 are distributed along the length direction of the two side plates 3 of the plate beam body 1, and the centers of two adjacent connection holes 5 are separated by a second distance.

[0022] The C-shaped plate beam body 1 is formed by rolling. The weight-reducing holes 4 are evenly arranged from the middle position of the middle plate 2 to both ends. The centers of two adjacent weight-reducing holes 4 are separated by a first distance, which can minimize the weight of the plate beam body 1 on the premise of ensuring the structural strength of the plate beam body 1; the connection holes 5 are evenly arranged on the side plates 3, and the connection holes 5 are used for screw connection with other components. The centers of two adjacent connection holes 5 are separated by a second distance, which can ensure sufficient installation space for other components and at the same time does not affect the structural strength of the plate beam body 1.

[0023] When installed and used, as Figure 2As shown, its two side plates 3 are horizontally arranged. The connection holes 5 on the side plates 3 are used to connect other components by screws above and below the beam body 1. The middle plate 2 is vertically arranged, and the weight-reducing holes 4 provided thereon can reduce the weight of the beam body 1 while ensuring its structural strength, effectively reducing the ceiling load and leaving a margin for other functional loads on the ceiling. In addition, a plurality of weight-reducing holes 4 facilitate the free flow of air in the completed ceiling or mezzanine, effectively solving the problem of the beam height hindering ceiling ventilation. When the process pipelines such as wind, water, and electricity in the ceiling are routed, they can freely pass through the weight-reducing holes 4, with a high degree of freedom in wiring and without the need to additionally occupy the space of the ceiling.

[0024] In one embodiment, the first distance is an integer multiple of the second distance.

[0025] Preferably, the first distance is three times the second distance; Assume that the width of the middle plate 2 is 160 mm, the width of the side plate 3 is 40 mm, the first distance is 300 mm, and the second distance is 100 mm.

[0026] As Figure 1 shown, in one embodiment, the projection of the normal line of the middle plate 2 passing through the center of the weight-reducing hole 4 on the side plate 3 passes through the center of the connection hole 5.

[0027] Connection holes 5 are provided at positions corresponding to the centers of the weight-reducing holes 4 on the side plate 3. When the first distance is three times the second distance, four connection holes 5 are arranged at corresponding positions on the side plate 3 between two adjacent weight-reducing holes 4.

[0028] The position of the connection hole 5 is determined according to the position of the weight-reducing hole 4, so that when the connection hole 5 is connected to other components, the force on each part of the beam body 1 is more balanced and it has better structural strength.

[0029] As Figure 3 shown, in one embodiment, the weight-reducing hole 4 is a trapezoidal hole, and two adjacent sides of two adjacent trapezoidal holes are arranged in parallel.

[0030] Or the weight-reducing hole 4 is a triangular hole, and two adjacent sides of two adjacent triangular holes are arranged in parallel.

[0031] Two adjacent weight-reducing holes 4 are arranged upside down from each other, and on the premise of ensuring the structural strength of the beam body 1, more weight-reducing holes 4 are arranged on the middle plate 2 to the maximum extent.

[0032] In addition, the distances between the upper and lower sides of the weight-reducing hole 4 and the upper and lower sides of the middle plate 2 are equal respectively.

[0033] As Figure 4As shown, in one embodiment, the ratio of the height of the weight-reducing hole 4 to the width of the middle plate 2 satisfies a first set ratio, the ratio of the length of the lower bottom edge of the weight-reducing hole 4 to the height of the weight-reducing hole 4 satisfies a second set ratio, and the ratio of the length of the lower bottom edge of the weight-reducing hole 4 to the length of the upper bottom edge of the weight-reducing hole 4 satisfies a third set ratio.

[0034] Further, the range of the first set ratio is 0.5 to 0.625, the range of the second set ratio is 2 to 2.2, and the range of the third set ratio is 2.5 to 4.

[0035] When arranging the weight-reducing hole 4, it can be adjusted within the ranges of the first set ratio, the second set ratio, and the third set ratio, so that the arrangement of the weight-reducing hole 4 can ensure the structural strength of the plate beam body 1 and minimize the weight of the plate beam body 1.

[0036] For example, when the weight-reducing hole 4 is a trapezoidal hole, the four corners of the trapezoidal hole are rounded. The width of the middle plate 2 is 160 mm, the width of the side plate 3 is 40 mm, the height of the weight-reducing hole 4 is 100 mm, the first fillet radius at the connection of the lower bottom edge (the longer bottom edge) of the trapezoidal hole and the waist is 10 mm, and the distance between the centers of the two first fillets is 200 mm. The second fillet radius at the connection of the upper bottom edge (the shorter bottom edge) of the trapezoidal hole and the waist is 40 mm, and the distance between the centers of the two second fillets is 51 mm.

[0037] As Figure 1 and Figure 5 shown, the length of the connecting hole 5 is less than the length of the upper bottom edge of the weight-reducing hole 4, and the ratio of the width of the connecting hole 5 to the width of the side plate 3 is 0.25 to 0.3.

[0038] The size of the connecting hole 5 is mainly suitable for most screws on the premise of not affecting the structural strength of the plate beam body 1, so that it can be connected and fixed with other components.

[0039] For example, the width of the middle plate 2 is 160 mm, the width of the side plate 3 is 40 mm, the width of the connecting hole 5 is 10 mm, the length is 30 mm, and both ends of the connecting hole 5 are semi-circles with a diameter of 10 mm. The distance between the centers of the semi-circles and the two long sides of the side plate 3 is 20 mm.

[0040] As Figure 6 shown, the present invention also discloses a manufacturing method of a metal rolling C-shaped porous plate beam, including: S1. Determine the design dimensions and design positions of the weight-reducing hole 4 and the connecting hole 5 according to the size and required structural strength of the formed C-shaped plate beam body 1; Among them, the dimensions of the formed C-shaped plate beam body 1 include: the thickness of the metal plate used for the plate beam body 1, the length of the plate beam body 1, the width of the middle plate 2, and the width of the side plate 3; the required structural strength is the structural strength required for the scenario where the plate beam body 1 is applied (for example, used as a ceiling keel); assuming the required structural strength is A, the structural strength B of the plate beam body 1 after arranging the weight reduction holes 4 and the connection holes 5 should be greater than the required structural strength A, or a safety threshold can be set so that the difference between the structural strength B and the required structural strength A is not less than the safety threshold to ensure the structural strength of the plate beam body 1 during actual use; Further, the centers of two adjacent weight reduction holes 4 are separated by a first distance, and the centers of two adjacent connection holes 5 are separated by a second distance; The design dimensions of the weight reduction holes 4 and the connection holes 5 include: the dimensions of the weight reduction holes 4 and the dimensions of the connection holes 5; the design positions include: the first distance, the second distance, and the relationship between the first distance and the second distance.

[0041] S2. Roll the metal plate into the C-shaped plate beam body 1; Rolling the metal plate is to press the metal plate into the required shape or size by applying pressure; in this step, the metal plate is rolled into the C-shaped plate beam body 1 by using the rolling process; S3. According to the design dimensions and design positions of the weight reduction holes 4 and the connection holes 5, process the weight reduction holes 4 and the connection holes 5 on the plate beam body 1.

[0042] In step S3, the weight reduction holes 4 and the connection holes 5 can be formed by stamping, and multiple weight reduction holes 4 or connection holes 5 can be processed at one time.

[0043] In steps S2 and S3, first roll the metal plate to form the C-shaped plate beam body 1, and then open holes in the middle plate 2 and the side plate 3 to process the weight reduction holes 4 and the connection holes 5.

[0044] Or, the order of steps S2 and S3 can be reversed, that is, first open holes in the metal plate to process the weight reduction holes 4 and the connection holes 5, and then roll the perforated metal plate to form the plate beam body 1 with the weight reduction holes 4 and the connection holes 5; Specifically, it is selected according to the actual situation, and preferably the method with the least impact on the structural strength of the plate beam body 1 is used to process the metal plate.

[0045] Through the above manufacturing method, before processing the metal plate, the dimensions and positions of the weight-reducing holes 4 and the connecting holes 5 can be optimized first. For example, a structural diagram of the metal C-shaped porous plate beam is established using design software, and then the stress simulation analysis of the actual working conditions of the metal C-shaped porous plate beam is carried out using finite element analysis software or simulation analysis software. The structural diagram is adjusted according to the analysis results to realize the optimization of the dimensions and positions of the weight-reducing holes 4 and the connecting holes 5. Then, using the obtained design dimensions and design positions, the holes are machined on the plate beam body 1, so that it is not necessary to actually manufacture the plate beam body 1 and then carry out structural optimization, saving the cost of structural optimization design. In addition, when machining the holes, stamping or punching can be used, and multiple holes can be machined at one time, reducing the processing cost and improving the production efficiency.

[0046] As Figure 7 shown, further, the determination of the design dimensions and design positions of the weight-reducing holes 4 and the connecting holes 5 includes: S11. Determine the initial dimensions of the weight-reducing holes 4, and determine the initial dimensions of the connecting holes 5 according to the initial dimensions of the weight-reducing holes 4 and the dimensions of the side plates 3. Among them, the initial dimensions of the weight-reducing holes 4 are determined according to the first set ratio, the second set ratio, and the third set ratio. The ratio of the height of the weight-reducing hole 4 to the width of the middle plate 2 of the plate beam body 1 satisfies the first set ratio, the ratio of the length of the lower bottom edge of the weight-reducing hole 4 to the height of the weight-reducing hole 4 satisfies the second set ratio, and the ratio of the length of the lower bottom edge of the weight-reducing hole 4 to the length of the upper bottom edge of the weight-reducing hole 4 satisfies the third set ratio. Specifically, according to the range of the first set ratio of 0.5 to 0.625, the range of the second set ratio of 2 to 2.2, and the range of the third set ratio of 2.5 to 4, the initial dimensions of the weight-reducing holes 4 are arbitrarily determined. Then, according to the dimensional relationship between the weight-reducing holes 4 and the connecting holes 5 (the length of the connecting holes 5 is less than the length of the upper bottom edge of the weight-reducing holes 4), and the dimensional relationship between the connecting holes 5 and the side plates 3 (the ratio range of the width of the connecting holes 5 to the width of the side plates 3 is 0.25 to 0.3), the initial dimensions of the connecting holes 5 are arbitrarily determined.

[0047] S12. Determine the relative positions of the weight-reducing holes 4 and the connecting holes 5, so that the projection of the normal line of the middle plate 2 passing through the center of the weight-reducing hole 4 on the side plate 3 passes through the center of the connecting hole 5, and determine the initial values of the first distance and the second distance, so that the first distance is an integer multiple of the second distance. Specifically, the relative positions of the weight-reducing holes 4 and the connecting holes 5 include that the first distance is an integer multiple of the second distance. For example, three times is selected. It also includes that the projection of the normal line of the middle plate 2 passing through the center of the weight-reducing hole 4 on the side plate 3 passes through the center of the connecting hole 5. Then, when two adjacent weight-reducing holes 4 do not coincide, an initial value of the first distance is arbitrarily determined. According to the multiple relationship between the first distance and the second distance, the initial value of the second distance is determined. Based on the initial values of the first distance and the second distance and the initial sizes of the weight-reducing holes 4 and the connecting holes 5, the initial weight and the initial structural strength of the formed C-shaped plate beam body 1 can be obtained. Specifically, it can be obtained by using finite element analysis software, which is the prior art and will not be elaborated here.

[0048] S13. Adjust the initial values of the first distance and the second distance and the initial sizes of the weight-reducing holes 4 and the connecting holes 5 to obtain the design sizes and design positions of the weight-reducing holes 4 and the connecting holes 5 when the weight of the formed C-shaped plate beam body 1 is minimized and its structural strength is maximized.

[0049] In step S13, the initial sizes and initial positions of the weight-reducing holes 4 and the connecting holes 5 on the plate beam body 1 determined in step S12 can be adjusted, so as to obtain the plate beam body 1 that meets the requirements and realize the determination of the design sizes and design positions of the weight-reducing holes 4 and the connecting holes 5. Specifically, the sizes and positions of the weight-reducing holes 4 and the connecting holes 5 can be optimized through finite element simulation analysis to obtain the sizes and positions of the weight-reducing holes 4 and the connecting holes 5 when the weight of the plate beam body 1 is minimized and its structural strength is maximized, as their design sizes and design positions.

[0050] As Figure 8 shown, further, adjusting the initial values of the first distance and the second distance and the initial sizes of the weight-reducing holes 4 and the connecting holes 5 includes: S131. Obtain the initial shapes of multiple plate beam bodies 1; among them, the shapes of different plate beam bodies 1 differ in the shapes of the weight-reducing holes 4. Specifically, an initial value is set for the first set ratio, and multiple shapes of the weight-reducing holes 4 are obtained within the ranges of the second set ratio and the third set ratio. The shapes of each weight-reducing hole 4 are respectively arranged on the plate beam body 1 according to their initial positions, where the initial positions include the initial value of the first distance and the parallel arrangement mode of the adjacent sides of adjacent weight-reducing holes 4. In step S131, a value is selected as the initial value within the range of 0.5 to 0.625 of the first set ratio, multiple values are respectively selected within the range of 2 to 2.2 of the second set ratio and within the range of 2.5 to 4 of the third set ratio, and multiple initial dimensions of the weight reduction holes 4 (i.e., the shapes of multiple weight reduction holes 4) are determined; the dimensions of the connection holes 5 on multiple plate beam bodies 1 (making their lengths less than the minimum value of the upper base lengths of the weight reduction holes 4), and the relative positions of the weight reduction holes 4 and the connection holes 5 (adjacent weight reduction holes 4 do not overlap, and adjacent connection holes 5 do not overlap) are all set to be the same.

[0051] S132. Conduct a structural strength simulation analysis of the initial shapes of all plate beam bodies 1 under actual working conditions to obtain the deformation amount of the intermediate plate 2 of each plate beam body 1, and screen out the optimal shape of the plate beam body 1 based on the minimum deformation amount; Since multiple plate beam bodies 1 are the same except for the shapes of their weight reduction holes 4, when conducting a structural strength simulation analysis under actual working conditions, it is mainly to analyze the influence of different shapes of the weight reduction holes 4 on the structural strength of the plate beam body 1, so as to be able to screen out the shape (corresponding to its dimensions) of the weight reduction hole 4 that minimizes the deformation amount of the intermediate plate 2; for example, the ratio of the upper base to the lower base of the weight reduction hole 4, and the ratio of the lower base to the height, will cause significant differences in the shape of the weight reduction hole 4, so when the intermediate plate 2 is stressed, the stress conditions at the weight reduction hole 4 are different, thus affecting the structural strength of the intermediate plate 2; therefore, the optimal shape of the weight reduction hole 4 can be screened out through step S132.

[0052] S133. Optimize the optimal shape of the plate beam body 1 with respect to the first set ratio, the first distance, the second distance, and the dimensions of the connection holes 5. The optimization goal is to minimize the weight of the plate beam body 1 without reducing the structural strength of the plate beam body 1, so as to obtain an optimal matching scheme for the first distance, the second distance, and the dimensions of the weight reduction holes 4 and the connection holes 5 on the formed C-shaped plate beam body 1; Specifically in step S133, the first set ratio, the first distance, the second distance, and the dimensions of the connection holes 5 are used as optimization variables, and the numerical ranges of the first set ratio (for example, 0.5 to 0.625), the first distance and the second distance (for example, the numerical range of the first distance is 240 mm to 600 mm, and the first distance is three times the second distance), and the numerical range of the dimensions of the connection holes 5 (for example, the ratio range of the width of the connection hole 5 to the width of the side plate 3 is 0.25 to 0.3, and the length range of the connection hole 5 is 20 mm to 40 mm) are limited, and multiple numerical combination schemes of the first set ratio, the first distance, the second distance, and the dimensions of the connection holes 5 are obtained, and the optimal variable combination is determined, so as to obtain an optimal matching scheme for the first distance, the second distance, and the dimensions of the weight reduction holes 4 and the connection holes 5 on the formed C-shaped plate beam body 1; When the first set ratio increases, the shape of the weight-reducing hole 4 remains unchanged, and the overall size of the weight-reducing hole 4 increases proportionally. When the first set ratio decreases, the shape of the weight-reducing hole 4 remains unchanged, and its overall size decreases proportionally. The weight-reducing holes 4 are arranged from the middle of the plate girder body 1 to both outer ends. When the first distance increases, the number of the weight-reducing holes 4 decreases. When the first distance decreases, the number of the weight-reducing holes 4 increases. There is an integer multiple limit between the second distance and the first distance, preferably three times. The second distance changes with the change of the first distance.

[0053] Through the above method, the shape of the weight-reducing hole 4 that has the least influence on the structural strength of the plate girder body 1 can be preferentially selected. Then, the size of the weight-reducing hole 4 is changed proportionally, and the first distance, the second distance, and the size of the connecting hole 5 are adjusted adaptively. The variable combination that minimizes the weight of the plate girder body 1 without reducing the structural strength of the plate girder body 1 is determined as the design size and design position of the weight-reducing hole 4 and the connecting hole 5. The obtained shape of the plate girder body 1 can meet the structural strength required by its actual working conditions, and at the same time can minimize its weight, effectively reducing the ceiling load and leaving a margin for other functional loads on the ceiling. In addition, the weight-reducing holes 4 facilitate the free flow of air in the completed ceiling or mezzanine, effectively solving the problem of the beam height hindering ceiling ventilation. When the process pipelines such as wind, water, and electricity in the ceiling are routed, they can freely pass through the weight-reducing holes 4, with a high degree of freedom in wiring and without the need to additionally occupy the space of the ceiling.

[0054] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present invention.

[0055] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0056] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those skilled in the art, additional modifications can be easily made. Therefore, without departing from the general concept defined by the present invention, the present invention is not limited to the specific details and the examples shown and described herein.

Claims

1. A manufacturing method of a metal rolling C-shaped porous plate beam, characterized in that, Including: Determine the design dimensions and design positions of the weight-reducing holes (4) and connection holes (5) according to the dimensions and required structural strength of the formed C-shaped plate beam body (1). Roll a metal plate into a C-shaped plate beam body (1). Process weight-reducing holes (4) and connection holes (5) on the plate beam body (1) according to the design dimensions and design positions of the weight-reducing holes (4) and connection holes (5).

2. The manufacturing method of the metal rolling C-shaped porous plate beam according to claim 1, characterized in that The centers of two adjacent weight-reducing holes (4) are separated by a first distance, and the centers of two adjacent connection holes (5) are separated by a second distance.

3. The manufacturing method of the metal rolling C-shaped porous plate beam according to claim 2, characterized in that, The determination of the design dimensions and design positions of the weight-reducing holes (4) and connection holes (5) includes: Determine the initial dimensions of the weight-reducing holes (4), and determine the initial dimensions of the connection holes (5) according to the initial dimensions of the weight-reducing holes (4) and the dimensions of the side plates (3). Determine the relative positions of the weight-reducing holes (4) and the connection holes (5) so that the projection of the normal line of the intermediate plate (2) passing through the center of the weight-reducing hole (4) on the side plate (3) passes through the center of the connection hole (5), and determine the initial values of the first distance and the second distance so that the first distance is an integer multiple of the second distance. Adjust the initial values of the first distance and the second distance and the initial dimensions of the weight-reducing holes (4) and the connection holes (5) to obtain the design dimensions and design positions of the weight-reducing holes (4) and the connection holes (5) when the weight of the formed C-shaped plate beam body (1) is minimized and its structural strength is maximized.

4. The manufacturing method of the metal rolling C-shaped porous plate beam according to claim 3, characterized in that, The initial dimensions of the weight-reducing holes (4) are determined according to a first set ratio, a second set ratio, and a third set ratio. The ratio of the height of the weight-reducing hole (4) to the width of the intermediate plate (2) of the plate beam body (1) satisfies the first set ratio, the ratio of the length of the lower bottom edge of the weight-reducing hole (4) to the height of the weight-reducing hole (4) satisfies the second set ratio, and the ratio of the length of the lower bottom edge of the weight-reducing hole (4) to the length of the upper bottom edge of the weight-reducing hole (4) satisfies the third set ratio.

5. The manufacturing method of the metal rolling C-shaped porous plate beam according to claim 4, characterized in that, Adjusting the initial values of the first distance and the second distance and the initial dimensions of the weight-reducing holes (4) and the connection holes (5) includes: Obtain the initial shapes of multiple plate beam bodies (1); among them, the shapes of different plate beam bodies (1) differ in the shapes of the weight-reducing holes (4). Conduct a structural strength simulation analysis of the actual working conditions for the initial shapes of all the plate beam bodies (1) to obtain the deformation amount of the intermediate plate (2) of each plate beam body (1), and select the optimal shape of the plate beam body (1) based on the minimum deformation amount. Optimize the shape of the optimal plate beam body (1) with respect to the first set ratio, the first distance, the second distance, and the dimensions of the connection holes (5). The optimization goal is to minimize the weight of the plate beam body (1) without reducing its structural strength, so as to obtain the optimal matching scheme of the first distance and the second distance and the dimensions of the weight-reducing holes (4) and the connection holes (5) on the formed C-shaped plate beam body (1).

6. A metal rolled C-shaped porous plate beam is manufactured by using the manufacturing method of the metal rolled C-shaped porous plate beam according to any one of claims 1-5, and is characterized in that, Including: The plate beam body (1) is rolled into a C shape, and a plurality of weight-reducing holes (4) are distributed along the length direction of the middle plate (2), and the centers of two adjacent weight-reducing holes (4) are separated by a first distance; a plurality of connecting holes (5) are distributed along the length direction of the two side plates (3) of the plate beam body (1), and the centers of two adjacent connecting holes (5) are separated by a second distance.

7. The metal rolling C-shaped porous plate beam according to claim 6, wherein The first distance is an integer multiple of the second distance.

8. The metal rolling C-shaped porous plate beam according to claim 7, wherein, The projection of the normal line of the middle plate (2) passing through the center of the weight-reducing hole (4) on the side plate (3) passes through the center of the connecting hole (5).

9. The metal rolling C-shaped porous plate beam according to claim 6, characterized in that, The weight-reducing hole (4) is a trapezoidal hole, and two adjacent sides of two adjacent trapezoidal holes are arranged in parallel; The ratio of the height of the weight-reducing hole (4) to the width of the middle plate (2) satisfies a first set ratio, the ratio of the length of the lower bottom side of the weight-reducing hole (4) to the height of the weight-reducing hole (4) satisfies a second set ratio, and the ratio of the length of the lower bottom side of the weight-reducing hole (4) to the length of the upper bottom side of the weight-reducing hole (4) satisfies a third set ratio.

10. The metal rolling C-shaped porous plate beam according to claim 9, wherein, The range of the first set ratio is 0.5 to 0.625, the range of the second set ratio is 2 to 2.2, and the range of the third set ratio is 2.5 to 4; The length of the connecting hole (5) is less than the length of the upper bottom side of the weight-reducing hole (4), and the ratio of the width of the connecting hole (5) to the width of the side plate (3) is 0.25 to 0.3.

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