A metal rolled C-shaped porous plate beam and its manufacturing method

Abstract

The present invention relates to the technical field of processing metal building components, and discloses a metal rolled C-shaped porous plate beam and a method for manufacturing the same, comprising: determining the design size and design position of the weight-reducing holes and connection holes based on the size of the formed C-shaped plate beam body and the required structural strength; rolling a metal plate into a C-shaped plate beam body; and machining the weight-reducing holes and connection holes on the plate beam body based on the design size and design position of the weight-reducing holes and connection holes. Before machining the metal plate, the size and position of the openings are first optimized, and then the openings are machined using the designed size and design position, saving the cost of structural optimization design; when drilling the holes, stamping or punching can be used to machine multiple openings at one time, reducing processing costs and improving efficiency; the present invention can effectively reduce the load on the ceiling and solve the problem of beam height hindering ceiling ventilation; process pipelines in the ceiling can freely pass through the weight-reducing holes, and the wiring has a high degree of freedom.

Description

Technical Field

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

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

[0003] When used in modular cleanrooms, modular cleanrooms are assembled cleanrooms that can provide highly clean production or research spaces for specific environments. During construction, considerations must be given to ceiling ventilation, the routing of process pipelines within the ceiling, the ease of C-beam installation, and lightweight requirements.

[0004] In order to simultaneously meet the requirements for the metal C-beam structure and its structural strength during construction, the processing of the metal C-beam and its structural optimization are particularly important. At the same time, the costs of the processing and structural optimization processes also need to be considered.

[0005] 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

[0006] The Summary of the Invention introduces a series of simplified concepts that will be further described in the Detailed Description of the Invention. The Summary of the Invention is not intended to limit the key features and essential features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0007] To at least partially solve the above problems, the present invention provides a method for manufacturing a metal rolled C-shaped porous plate beam, comprising:

[0008] Determine the design size and location of the weight-reducing holes and connection holes based on the size of the formed C-shaped plate beam body and the required structural strength;

[0009] The metal plate is rolled into a C-shaped plate beam body;

[0010] The weight-reducing holes and the connection holes are processed and formed on the plate beam body according to their designed sizes and designed positions.

[0011] Preferably, the centers of two adjacent weight-reducing holes are spaced apart by a first distance, and the centers of two adjacent connecting holes are spaced apart by a second distance.

[0012] Preferably, the design size and design position of the weight-reducing holes and the connection holes are determined by:

[0013] Determine the initial size of the weight-reducing hole, and determine the initial size of the connecting hole based on the initial size of the weight-reducing hole and the size of the side plate;

[0014] Determine the relative positions of the lightening hole and the connecting hole so that the projection of the normal line of the middle plate passing through the center of the lightening hole on the side plate passes through the center of the connecting hole, 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;

[0015] The initial values of the first distance and the second distance and the initial sizes of the weight-reducing holes and the connecting holes are adjusted to obtain the design sizes and design positions of the weight-reducing holes and the connecting holes when the weight of the formed C-shaped plate beam body is minimized and its structural strength is maximized.

[0016] Preferably, the initial size of the weight-reducing hole is determined according to the first set ratio, the second set ratio and the third set ratio;

[0017] 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 lower bottom side length of the weight-reducing hole to the height of the weight-reducing hole satisfies the second set ratio, and the ratio of the lower bottom side length of the weight-reducing hole to the upper bottom side length of the weight-reducing hole satisfies the third set ratio.

[0018] Preferably, adjusting the initial values of the first distance and the second distance and the initial sizes of the weight-reducing hole and the connecting hole comprises:

[0019] obtaining initial shapes of a plurality of plate beam bodies, wherein the shapes of the different plate beam bodies differ from each other in the shapes of the weight-reducing holes;

[0020] Perform structural strength simulation analysis of the actual working conditions on the initial shapes of all plate beam bodies to obtain the deformation of the middle plate of each plate beam body, and select the optimal plate beam body shape based on the minimum deformation;

[0021] The shape of the optimal plate beam body is optimized in terms of the first set ratio, the first distance, the second distance and the size of the connecting holes. The optimization goal is to minimize the weight of the plate beam body without reducing the structural strength of the plate beam body, so as to obtain the optimal matching solution of the first distance and the second distance on the formed C-shaped plate beam body and the sizes of the weight-reducing holes and the connecting holes.

[0022] The present invention also provides a metal rolled C-shaped porous plate beam, comprising: a plate beam body rolled into a C-shape, wherein a plurality of weight-reducing holes are distributed on the middle plate along its length direction, and the centers of two adjacent weight-reducing holes are separated by a first distance; a plurality of connecting holes are distributed on the two side plates of the plate beam body along its length direction, and the centers of two adjacent connecting holes are separated by a second distance.

[0023] Preferably, the first distance is an integer multiple of the second distance.

[0024] Preferably, the projection of the normal line of the middle plate passing through the center of the lightening hole on the side plate passes through the center of the connecting hole.

[0025] Preferably, the weight-reducing holes are trapezoidal holes, and two adjacent sides of two adjacent trapezoidal holes are arranged in parallel;

[0026] The ratio of the height of the weight-reducing hole to the width of the middle plate satisfies the 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 the 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 the third set ratio.

[0027] Preferably, the first setting ratio ranges from 0.5 to 0.625, the second setting ratio ranges from 2 to 2.2, and the third setting ratio ranges from 2.5 to 4;

[0028] 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 0.25-0.3.

[0029] Compared with the prior art, the present invention has at least the following beneficial effects:

[0030] The metal rolled C-shaped porous plate beam and its manufacturing method described in the present invention can optimize the size and position of the weight-reducing holes and the connection holes before processing the metal plate. Then, using the obtained designed size and position, the holes are processed in the plate beam body. This eliminates the need to perform structural optimization after the plate beam body is actually manufactured, thus saving the cost of structural optimization design. In addition, when performing the holes, stamping or punching can be used, and multiple holes can be processed at one time, thereby reducing processing costs and improving production efficiency.

[0031] Through the connection holes on the side panels, other components can be connected above and below the plate beam body by screws. The weight-reducing holes set in the middle panel can reduce the weight of the plate beam body while 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 mezzanine, effectively solving the problem of beam height hindering ceiling ventilation. When routing, the air, water, electricity and other process pipelines in the ceiling can freely pass through the weight-reducing holes, with a high degree of freedom in wiring, and no additional space in the ceiling is required.

[0032] The metal rolled C-shaped porous plate beam and its manufacturing method described in the present invention, as well as other advantages, objectives and features of the present invention will be reflected in part through the following description, and will also be understood by technicians in this field through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0034] Figure 1 This is a schematic diagram of the three-dimensional structure of the metal rolled C-shaped porous plate beam according to the present invention;

[0035] Figure 2 This is a schematic side structural diagram of the metal rolled C-shaped porous plate beam according to the present invention;

[0036] Figure 3 This is a schematic structural diagram of the middle plate in the metal rolled C-shaped porous plate beam of the present invention;

[0037] Figure 4 This is a schematic structural diagram of the weight-reducing holes in the metal rolled C-shaped porous plate beam of the present invention;

[0038] Figure 5 This is a schematic structural diagram of the connecting holes in the metal rolled C-shaped porous plate beam of the present invention;

[0039] Figure 6 This is a flow chart of the method for manufacturing the metal rolled C-shaped porous plate beam according to the present invention;

[0040] Figure 7 This is a specific flow chart of step S1 in the method for manufacturing the metal rolled C-shaped porous plate beam of the present invention;

[0041] Figure 8 This is a specific flow chart of step S13 in the method for manufacturing the metal rolled C-shaped porous plate beam of the present invention. DETAILED DESCRIPTION

[0042] 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 the invention with reference to the description.

[0043] It should be understood that terms such as “having”, “including” and “comprising” used herein do not preclude the existence or addition of one or more other elements or combinations thereof.

[0044] like Figure 1As shown, the present invention provides a metal rolled C-shaped porous plate beam, comprising: a plate beam body 1 rolled into a C-shape, wherein a plurality of weight-reducing holes 4 are distributed on the middle plate 2 along its length direction, and the centers of two adjacent weight-reducing holes 4 are separated by a first distance; a plurality of connecting holes 5 are distributed on the two side plates 3 of the plate beam body 1 along its length direction, and the centers of two adjacent connecting holes 5 are separated by a second distance.

[0045] The C-shaped plate beam body 1 is formed by calendering, and 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. The first distance can ensure the structural strength of the plate beam body 1 while minimizing the weight of the plate beam body 1; the connecting holes 5 are evenly arranged on the side plates 3, and the connecting holes 5 are used to be connected to other components by screws. The centers of two adjacent connecting holes 5 are separated by a second distance. The second distance can ensure that there is sufficient installation space with other components without affecting the structural strength of the plate beam body 1.

[0046] When installing and using Figure 2 As shown, its two side panels 3 are arranged horizontally, and the connecting holes 5 on the side panels 3 are used to connect other components above and below the plate beam body 1 by screws. The middle plate 2 is arranged vertically, and the weight-reducing holes 4 arranged thereon can reduce the weight of the plate beam body 1 while ensuring its structural strength, effectively reduce the ceiling load, and leave a margin for other functional loads on the ceiling; in addition, multiple weight-reducing holes 4 facilitate the free flow of air in the completed ceiling or mezzanine, effectively solving the problem of beam height hindering ceiling ventilation; when routing, the process pipelines such as wind, water, and electricity in the ceiling can freely pass through the weight-reducing holes 4, and the wiring has a high degree of freedom and does not require additional space in the ceiling.

[0047] In one embodiment, the first distance is an integer multiple of the second distance.

[0048] Preferably, the first distance is three times the second distance;

[0049] 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.

[0050] like Figure 1 As shown, in one embodiment, the projection of the normal line of the middle plate 2 passing through the center of the lightening hole 4 on the side plate 3 passes through the center of the connecting hole 5 .

[0051] Connection holes 5 are provided on the side panels 3 at positions corresponding to the centers of the weight-reducing holes 4 . When the first distance is three times the second distance, four connection holes 5 are arranged at corresponding positions on the side panels 3 between two adjacent weight-reducing holes 4 .

[0052] 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 forces at various locations of the plate beam body 1 are more balanced, and the plate beam body 1 has better structural strength.

[0053] like Figure 3 As shown, in one embodiment, the weight-reducing holes 4 are trapezoidal holes, and two adjacent sides of two adjacent trapezoidal holes are arranged in parallel.

[0054] Alternatively, the weight-reducing holes 4 are triangular holes, and two adjacent sides of two adjacent triangular holes are arranged in parallel.

[0055] The two adjacent weight-reducing holes 4 are arranged inversely to each other. On the premise of ensuring the structural strength of the plate beam body 1 , a maximum number of weight-reducing holes 4 are arranged on the middle plate 2 .

[0056] In addition, the upper and lower sides of the lightening hole 4 are equidistant from the upper and lower sides of the middle plate 2 .

[0057] like Figure 4 As shown, in one embodiment, the ratio of the height of the weight-reducing hole 4 to the width of the middle plate 2 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.

[0058] Furthermore, the range of the first setting ratio is 0.5-0.625, the range of the second setting ratio is 2-2.2, and the range of the third setting ratio is 2.5-4.

[0059] When arranging the weight-reducing holes 4, they can be adjusted within the range of a first set ratio, a second set ratio, and a third set ratio, so that the arrangement of the weight-reducing holes 4 can ensure the structural strength of the plate beam body 1 and minimize the weight of the plate beam body 1.

[0060] 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 of the lower base (the longer base) of the trapezoidal hole and the waist connection is 10 mm, and the distance between the centers of the two first fillets is 200 mm, the second fillet radius of the upper base (the shorter base) of the trapezoidal hole and the waist connection is 40 mm, and the distance between the centers of the two second fillets is 51 mm.

[0061] like Figure 1 and Figure 5 As shown, 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 0.25-0.3.

[0062] The size of the connection hole 5 is mainly suitable for most screws without affecting the structural strength of the plate beam body 1, so that it can be connected and fixed with other components.

[0063] 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, and the length is 30 mm. The two ends of the connecting hole 5 are semicircles with a diameter of 10 mm, and the distance between the center of the semicircle and the two long sides of the side plate 3 is 20 mm.

[0064] like Figure 6 As shown, the present invention also discloses a method for manufacturing a metal rolled C-shaped porous plate beam, comprising:

[0065] S1. Determine the design size and position of the lightening holes 4 and the connection holes 5 based on the size of the formed C-shaped plate beam body 1 and the required structural strength;

[0066] 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 plates 3; the required structural strength is the structural strength required for the scenario in which the plate beam body 1 is used (for example, as a ceiling keel); assuming the required structural strength is A, the structural strength B of the plate beam body 1 after the weight reduction holes 4 and the connection holes 5 are arranged 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, so as to ensure the structural strength of the plate beam body 1 when actually used;

[0067] Furthermore, the centers of two adjacent weight-reducing holes 4 are spaced apart by a first distance, and the centers of two adjacent connection holes 5 are spaced apart by a second distance;

[0068] The design dimensions of the weight-reducing hole 4 and the connecting hole 5 include: the dimensions of the weight-reducing hole 4 and the dimensions of the connecting hole 5; the design position includes: the first distance, the second distance and the relationship between the first distance and the second distance.

[0069] S2, rolling the metal plate into a C-shaped plate beam body 1;

[0070] Rolling the metal plate is to press the metal plate into a desired shape or size by applying pressure. In this step, the metal plate is rolled into a C-shaped plate beam body 1 by a rolling process.

[0071] S3. According to the designed sizes and positions of the lightening holes 4 and the connecting holes 5, the lightening holes 4 and the connecting holes 5 are machined and formed on the plate beam body 1.

[0072] In step S3 , the weight-reducing holes 4 and the connecting holes 5 can be formed by stamping, and a plurality of weight-reducing holes 4 or connecting holes 5 can be stamped at one time.

[0073] In step S2 and step S3, the metal plate is first rolled to form a C-shaped plate beam body 1, and then the middle plate 2 and the side plates 3 are opened to form weight-reducing holes 4 and connection holes 5.

[0074] Alternatively, the order of step S2 and step S3 can be reversed, that is, the metal plate is first punched to form the weight-reducing holes 4 and the connecting holes 5, and then the punched metal plate is rolled to form the plate beam body 1 having the weight-reducing holes 4 and the connecting holes 5;

[0075] The specific selection is made based on the actual situation, and it is preferred to process the metal plate using a method that has the least impact on the structural strength of the plate beam body 1 .

[0076] Through the above-mentioned production method, before processing the metal plate, the size and position of the weight-reducing holes 4 and the connecting holes 5 can be optimized and designed first. For example, the structural diagram of the metal C-shaped porous plate beam is established by using design software, and then the actual working conditions of the metal C-shaped porous plate beam are subjected to force simulation analysis by using finite element analysis software or simulation analysis software. According to the analysis results, the structural diagram is adjusted to achieve the optimization of the size and position of the weight-reducing holes 4 and the connecting holes 5; then, the obtained design size and design position are used to perform hole opening processing on the plate beam body 1, so that there is no need to actually produce the plate beam body 1 and then perform structural optimization, saving the cost of structural optimization design; in addition, when opening holes, stamping or punching can be used, and multiple holes can be processed at one time, reducing processing costs and improving production efficiency.

[0077] like Figure 7 As shown, further, the determination of the design size and design position of the weight-reducing hole 4 and the connecting hole 5 includes:

[0078] S11, determining the initial size of the lightening hole 4, and determining the initial size of the connecting hole 5 based on the initial size of the lightening hole 4 and the size of the side plate 3;

[0079] The initial size of the weight-reducing hole 4 is determined according to the first set ratio, the second set ratio and the third set ratio;

[0080] The ratio of the height of the lightening hole 4 to the width of the middle plate 2 of the plate beam body 1 satisfies a first set ratio, the ratio of the length of the lower base of the lightening hole 4 to the height of the lightening hole 4 satisfies a second set ratio, and the ratio of the length of the lower base of the lightening hole 4 to the length of the upper base of the lightening hole 4 satisfies a third set ratio;

[0081] Specifically, the initial size of the weight-reducing hole 4 is arbitrarily determined based on the range of the first set ratio of 0.5~0.625, the range of the second set ratio of 2~2.2, and the range of the third set ratio of 2.5~4, and then the initial size of the connecting hole 5 is arbitrarily determined based on the dimensional relationship between the weight-reducing hole 4 and the connecting hole 5 (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 dimensional relationship between the connecting hole 5 and the side panel 3 (the ratio of the width of the connecting hole 5 to the width of the side panel 3 is in the range of 0.25~0.3).

[0082] S12. Determine the relative positions of the lightening hole 4 and the connecting hole 5 so that the projection of the normal line of the middle plate 2 passing through the center of the lightening 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;

[0083] Specifically, the relative positions of the weight-reducing holes 4 and the connecting holes 5 include a first distance that is an integer multiple of the second distance, for example, three times, and also include a projection of the normal of the middle plate 2 passing through the center of the weight-reducing hole 4 on the side plate 3, passing through the center of the connecting hole 5; then, the initial value of the first distance is arbitrarily determined when two adjacent weight-reducing holes 4 do not overlap, and the initial value of the second distance is determined based on the multiple relationship between the first distance and the second distance; based on the initial values of the first distance and the second distance and the initial dimensions of the weight-reducing holes 4 and the connecting holes 5, the initial weight and initial structural strength of the formed C-shaped plate beam body 1 can be obtained, which can be obtained specifically by using finite element analysis software. This is a prior art and will not be repeated here.

[0084] 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.

[0085] In step S13, the initial size and initial position of the weight-reducing holes 4 and the connecting holes 5 on the plate beam body 1 determined in step S12 can be adjusted to obtain a plate beam body 1 that meets the requirements, and the design size and design position of the weight-reducing holes 4 and the connecting holes 5 can be determined. Specifically, the size and position of the weight-reducing holes 4 and the connecting holes 5 can be optimized through finite element simulation analysis to obtain the size and position 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 size and design position.

[0086] like Figure 8 As shown, further, the initial values of the first distance and the second distance and the initial sizes of the weight-reducing hole 4 and the connecting hole 5 are adjusted, including:

[0087] S131, obtaining initial shapes of multiple plate beam bodies 1; wherein the shapes of different plate beam bodies 1 differ in the shapes of the lightening holes 4;

[0088] Specifically, an initial value is set for the first set ratio, and shapes of multiple weight-reducing holes 4 are obtained within the range of the second set ratio and the third set ratio. The shape of each weight-reducing hole 4 is arranged on the plate beam body 1 according to its initial position, wherein the initial position includes an initial value of the first distance and a parallel arrangement of adjacent sides of adjacent weight-reducing holes 4.

[0089] In step S131, a value within the range of 0.5~0.625 of the first set ratio is selected as the initial value, and multiple values within the range of 2~2.2 of the second set ratio and the range of 2.5~4 of the third set ratio are respectively selected to determine multiple initial sizes of the weight-reducing holes 4 (i.e., the shapes of the multiple weight-reducing holes 4); the sizes of the connecting holes 5 on the multiple plate beam bodies 1 (so that their length is less than the minimum value of the bottom edge length of the weight-reducing holes 4), and the relative positions of the weight-reducing holes 4 and the connecting holes 5 (adjacent weight-reducing holes 4 do not overlap, and adjacent connecting holes 5 do not overlap) are all set to be the same.

[0090] S132. Performing structural strength simulation analysis under actual working conditions on the initial shapes of all plate beam bodies 1 to obtain the deformation of the middle plate 2 of each plate beam body 1, and selecting the optimal shape of the plate beam body 1 based on the minimum deformation;

[0091] Since multiple plate beam bodies 1 are identical except for the shapes of their lightening holes 4, when performing structural strength simulation analysis under actual working conditions, the main focus is on analyzing the effects of different shapes of the lightening holes 4 on the structural strength of the plate beam bodies 1, so as to screen out the shape of the lightening holes 4 (corresponding to their dimensions) that minimizes the deformation of the middle plate 2; for example, the ratio of the upper base to the lower base, and the ratio of the lower base to the height of the lightening holes 4 will result in large differences in the shapes of the lightening holes 4, so that when the middle plate 2 is subjected to stress, there will be differences in the stress conditions at the lightening holes 4, thereby affecting the structural strength of the middle plate 2; therefore, the optimal shape of the lightening holes 4 can be screened out through step S132.

[0092] S133. Optimize the first set ratio, the first distance, the second distance, and the size of the connection hole 5 of the optimal shape of the plate beam body 1. 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 solution for the first distance and the second distance, and the sizes of the weight-reducing hole 4 and the connection hole 5 on the formed C-shaped plate beam body 1.

[0093] Specifically, step S133 uses the first set ratio, the first distance, the second distance, and the size of the connection hole 5 as optimization variables, limits the numerical range of the first set ratio (for example, 0.5 to 0.625), the numerical range of 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 size of the connection hole 5 (for example, the ratio of the width of the connection hole 5 to the width of the side plate 3 is in the range of 0.25 to 0.3, and the length of the connection hole 5 is in the range of 20 mm to 40 mm), obtains multiple numerical combination schemes of the first set ratio, the first distance, the second distance, and the size of the connection hole 5, determines the optimal variable combination, and thereby obtains the optimal matching scheme of the first distance and the second distance on the formed C-shaped plate beam body 1 and the sizes of the weight-reducing hole 4 and the connection hole 5;

[0094] 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;

[0095] The weight-reducing holes 4 are arranged from the middle to the outer ends of the plate beam body 1. As the first distance increases, the number of weight-reducing holes 4 decreases, and as the first distance decreases, the number of weight-reducing holes 4 increases; the second distance is limited to an integer multiple of the first distance, preferably three times, and the second distance changes with the change of the first distance.

[0096] Through the above method, the shape of the lightening hole 4 that has the least impact on the structural strength of the plate beam body 1 can be preferentially selected. Then, the size of the lightening hole 4 is proportionally changed, and the first distance, the second distance, and the size of the connecting hole 5 are adaptively adjusted. The variable combination that minimizes the weight of the plate beam body 1 without reducing the structural strength of the plate beam body 1 is determined as the design size and design position of the lightening hole 4 and the connecting hole 5.

[0097] The shape of the obtained plate beam body 1 can meet the structural strength required for its actual working conditions, while minimizing its weight, effectively reducing the ceiling load, and leaving 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 beam height hindering ceiling ventilation; when routing, the air, water, electricity and other process pipelines in the ceiling can freely pass through the weight-reducing holes 4, with a high degree of freedom in wiring, and no additional space in the ceiling is required.

[0098] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying 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 therefore should not be understood as limiting the present invention.

[0099] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0100] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with this field, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the present invention, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A method for manufacturing a metal rolled C-shaped porous plate beam, characterized in that: include: Determine the design size and design position of the weight-reducing hole (4) and the connection hole (5) based on the size of the formed C-shaped plate beam body (1) and the required structural strength; Rolling the metal plate into a C-shaped plate beam body (1); According to the designed sizes and positions of the weight-reducing holes (4) and the connecting holes (5), the weight-reducing holes (4) and the connecting holes (5) are machined and formed on the plate beam body (1); The centers of two adjacent weight-reducing holes (4) are spaced apart by a first distance, and the centers of two adjacent connection holes (5) are spaced apart by a second distance; The design dimensions and design positions of the weight-reducing holes (4) and the connection holes (5) are determined by: Determine the initial size of the weight-reducing hole (4), and determine the initial size of the connecting hole (5) based on the initial size of the weight-reducing hole (4) and the size of the side plate (3); Determine the relative positions of the weight-reducing hole (4) and the connecting hole (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; Adjusting the initial values of the first distance and the second distance and the initial sizes of the weight-reducing hole (4) and the connection hole (5) to obtain the design sizes and design positions of the weight-reducing hole (4) and the connection hole (5) when the weight of the formed C-shaped plate beam body (1) is minimized and the structural strength is maximized; The initial size of the weight-reducing hole (4) is determined based on the first set ratio, the second set ratio, and the third set ratio; The ratio of the height of the lightening hole (4) to the width of the middle plate (2) of the plate beam body (1) satisfies a first set ratio, the ratio of the length of the lower base of the lightening hole (4) to the height of the lightening hole (4) satisfies a second set ratio, and the ratio of the length of the lower base of the lightening hole (4) to the length of the upper base of the lightening hole (4) satisfies a third set ratio; Adjusting the initial values of the first distance and the second distance and the initial sizes of the weight-reducing hole (4) and the connecting hole (5) includes: Obtaining the initial shapes of a plurality of plate beam bodies (1); wherein the difference in shape between the different plate beam bodies (1) lies in the shape of the weight-reducing holes (4); Performing structural strength simulation analysis of actual working conditions on the initial shapes of all plate beam bodies (1), obtaining the deformation of the middle plate (2) of each plate beam body (1), and selecting the optimal shape of the plate beam body (1) based on the minimum deformation; The shape of the optimal plate beam body (1) is optimized in terms of the first set ratio, the first distance, the second distance, and the size of the connection hole (5), with the optimization goal being 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 solution of the first distance and the second distance on the formed C-shaped plate beam body (1) and the sizes of the weight-reducing hole (4) and the connection hole (5); The range of the first setting ratio is 0.5-0.625, the range of the second setting ratio is 2-2.2, and the range of the third setting ratio is 2.5-4; 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 0.25-0.3.

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