EP4390001B1 - Procédé de traitement et de montage pour feuille d'aluminium torsadée présentant une couleur de gradient - Google Patents

Procédé de traitement et de montage pour feuille d'aluminium torsadée présentant une couleur de gradient Download PDF

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Publication number
EP4390001B1
EP4390001B1 EP22918270.4A EP22918270A EP4390001B1 EP 4390001 B1 EP4390001 B1 EP 4390001B1 EP 22918270 A EP22918270 A EP 22918270A EP 4390001 B1 EP4390001 B1 EP 4390001B1
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European Patent Office
Prior art keywords
aluminium sheet
twisting
units
aluminium
sheet
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EP22918270.4A
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German (de)
English (en)
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EP4390001A4 (fr
EP4390001A1 (fr
Inventor
Xiaonan CAI
Leping FU
Guangliang XU
Lianjiao YANG
Jun Zhu
Yiwen PAN
Yue Zhang
Zhenhong DAI
Guohui Chen
Bin Zhang
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Engineering Co Ltd Of Cccc Third Harbor Engineering Co Ltd
CCCC Third Harbor Engineering Co Ltd
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Engineering Co Ltd Of Cccc Third Harbor Engineering Co Ltd
CCCC Third Harbor Engineering Co Ltd
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/88—Curtain walls
    • E04B2/96—Curtain walls comprising panels attached to the structure through mullions or transoms
    • E04B2/962—Curtain walls comprising panels attached to the structure through mullions or transoms with angles or corners in the curtain wall
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F13/00—Coverings or linings, e.g. for walls or ceilings
    • E04F13/07—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor
    • E04F13/08—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements
    • E04F13/12—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements of metal or with an outer layer of metal or enameled metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/14—Twisting
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/88—Curtain walls
    • E04B2/90—Curtain walls comprising panels directly attached to the structure
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F13/00—Coverings or linings, e.g. for walls or ceilings
    • E04F13/07—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor
    • E04F13/08—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements
    • E04F13/0871—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements having an ornamental or specially shaped visible surface

Definitions

  • the present invention relates to the technical field of mounting and manufacturing of a twisted aluminium sheet for architectural decoration, in particular to a processing and mounting method for a twisted aluminium sheet having a gradient color.
  • the present invention is based on an engineering project of temporary venues of the 10 th China Flower EXPO, the temporary venues of this project are divided into three "blade-shaped" single-body steel structure buildings, and twisted aluminium sheets having gradient colors are hung outside a curtain wall of the Huaqi Hall, which have high artistry and high ornamental value.
  • aluminium sheets are widely used as a decorative material, and more aluminium sheets are processed and manufactured into decorative materials with high ornamental value.
  • a twisting radian and twisting deformation are the two most difficult variables to control, an excessively large twisting radian is prone to buckling deformation of the aluminium sheets, and an excessively small radian is prone to elastic deformation.
  • a traditional arc bending apparatus performs arc bending on the hollow ribbed aluminium sheets, the sheets are twisted by mechanical clamping at two ends, which will cause stress concentration near clamping ends at the moment, this position is uneven in deformation and not smooth, and when the two ends are clamped and twisted, they will extend along a longitudinal axis of the aluminium sheets, resulting in depression or diameter shrinkage in middle sections of the sheets.
  • Patent document GB2594778A introduces an approach to forming twisted building façade elements, particularly louvres, by utilizing metal precursors.
  • the process involves clamping an elongate metal precursor at two spaced-apart points, applying tension to the precursor, and then rotating one clamp relative to the other to induce a twist in the material.
  • the tension prevents unwanted deformations like rippling or crimping, ensuring a uniform twist.
  • the method can accommodate various degrees of twist, including at least 90 degrees and often 180 degrees or more, to account for the metal's elasticity and subsequent rebounding.
  • the apparatus designed for this method includes a first clamp, a second clamp spaced apart and linearly aligned with the first, a linear displacement means to tension the precursor, and a rotation means to twist it.
  • the invention aims to produce non-combustible, aesthetically pleasing, and structurally sound twisted metal façade elements suitable for building exteriors.
  • Patent document CN204343565U discloses a torsion equipment for bar-shaped aluminium sheet solar protection devices that enhances rigidity, reduces material consumption, and provides uniform light-blocking effects.
  • the twisted sheet material ensures consistent light-blocking performance from various angles, enhancing the aesthetic appeal of the building.
  • the equipment also includes a base with a first fixture, slide rails, a slide block with a turning cylinder driven by a motor, and a second fixture. This setup allows for the precise twisting of the aluminium sheets to the desired angle, accommodating different lengths to mitigate temperature-induced deformation.
  • Patent document WO2016148640 A1 discloses a system and method for twisting hollow metal bars used in the architectural industry, which alters the material's muscle memory without distorting its physical structure or cross-sectional shape.
  • the system includes a supporting device to fix one end of the hollow bar, a connector to link the bar to a twisting device, and the twisting device itself, which applies a torque to alter the material's muscle memory.
  • the method involves over twisting the bar in one direction and then twisting it back in the opposite direction to achieve the desired permanent twist without the need for additional supports.
  • Patent document US20110293959 A1 discloses a method for fabricating twisted hollow bars used in architectural elements like grilles or railings, which involves assembling separate longitudinal parts with joint means to allow for increased torsional stress without exceeding the material's fatigue limit.
  • Patent document EP2136015 A2 discloses a facade system with plastic slat elements and fixing elements designed for curved building facades, allowing for aesthetic flexibility and improved load distribution.
  • the present invention provides a processing and mounting method for a twisted aluminium sheet having a gradient color, which is implemented by adjusting a clamping apparatus, changing an internal structure of an aluminium sheet, etc.
  • a processing and mounting method for a twisted aluminium sheet having a gradient color includes the following steps:
  • the hollow aluminium sheet units are selected as a raw material, and meanwhile, the hollow aluminium sheet units are filled with the flexible fillers, so that stress on hollow aluminium sheets in a sheet twisting process is more uniform, and "the hollow sheets are filled with the flexible fillers, so that the stress in the sheet twisting process is more uniform", because a flexible material is at a ribbed sheet where the stress is easy to concentrate, concentrated stress can be dispersed and transferred very well.
  • aluminium sheet curtain wall hanging pieces are connected with a square steel rigid framework through fasteners, and the square steel rigid framework is connected with the steel structure building through connecting parts, so as to form an aluminium sheet curtain wall of a stable structure.
  • each aluminium sheet is formed by splicing the plurality of aluminium sheet units along grilles of the framework, to make variability of the aluminium sheet structure greater, and compared with an integrally-formed aluminium sheet structure, the aluminium sheet structure has stronger plasticity, and then a structure with a variety of colors and shapes may be formed.
  • the plurality of aluminium sheet units and the connecting parts may be marked and colored successively according to design, and each aluminium sheet unit and each connecting part may be painted respectively according to marks and colors.
  • the sheet rolling machine freely extends and retracts in a sheet length direction, so as to disperse stress in twisting.
  • an end of the sheet rolling machine may freely extend and retract in a sheet direction, so as to avoid longitudinal stress concentration. Further, the sheet rolling machine freely extends and retracts in a length direction.
  • the sheet is clamped between roller shafts of the sheet rolling machine, which is equivalent to limiting an XY direction in three-dimensional coordinates, but because the sheet is not clamped at ends, a Z direction is a free end and may freely extend and retract, and the Z direction (that is, the sheet length direction) will not obstruct free extending or shortening of the sheet in the twisting process, so that the problem of stress concentration will not appear.
  • a multi-time small-angle twisting process is adopted for sheet twisting, after rebound occurs in the process, multiple times of small-amount twisting continues to be performed, and an angle of single-time twisting does not exceed 5°, so that the angle is gradually close to a design value, and uncontrollable yield deformation is effectively overcome.
  • the flexible fillers are specifically of a tubular structure, a sheet structure or a hollow structure formed by a flexible material.
  • a plate, a pipeline or a hollow structure, etc. formed by a PVC material may be selected specifically, and is supported in each hollow aluminium sheet unit to form a supporting body, and at the same time, a concentrated stress condition may be uniformized.
  • a PVC pipe which is easy to obtain at a construction site, is generally selected, and it belongs to flexible materials, may uniformize concentrated stress of the aluminium sheet, and is low in cost.
  • the method further includes pretreatment of the aluminium sheet units, and the pretreatment is increase of the length of the aluminium sheet units, so that the aluminium sheet units are twisted after the length is greater than 6 m.
  • the present invention solves the problem of the effective length of the twisted aluminium sheet by increasing the length of the sheet to 6 m and then twisting, and then cutting two ends of a deformed aluminium sheet to the design length.
  • the 2 m sheet may be directly twisted, but a final effective length cannot reach 2 m, and because ends are prone to being damaged in the twisting process, herein, in order to ensure the effective length of the aluminium sheet, the 2 m sheet is lengthened and then twisted.
  • the painting of the aluminium sheet units is specifically as follows: the plurality of aluminium sheet units are divided into a plurality of aluminium sheet structures according to the design requirement of the gradient color, and the plurality of aluminium sheet units in each aluminium sheet structure are spliced successively to form the aluminium sheet structure having the gradient color.
  • a single complete curtain wall is formed by splicing 1 to 3 aluminium sheets, and twisting angles of the spliced aluminium sheets are superimposed to achieve a gradient effect.
  • a curtain wall at a northern end and a transition section of the building is a single-splicing curtain wall twisted by 90°
  • a curtain wall at a southern end is a double-splicing curtain formed by splicing two aluminium sheets twisted by 0° to 90°
  • a main curtain wall in the middle is a three-splicing curtain wall formed by splicing two aluminium sheets twisted by 90° and a surface sheet.
  • painting treatment is specifically as follows: operations of primer spraying, color paint spraying, varnish spraying and baking on two sides are carried out in sequence respectively on each aluminium sheet unit; and operations of primer, intermediate paint, finish paint and finish-coat paint are carried out in sequence for each connecting part, and a total thickness of a dry paint film of a coating is greater than or equal to 150 ⁇ m.
  • a distance between frameworks ranges from 4 m to 4.5 m, and each framework structure is formed by a plurality of square steels, which are connected by butt welds in a transverse direction and/or a longitudinal direction.
  • a large gap range is that a width is about 4 m to 4.5 m and a height is about 2.5 m to 5 m
  • a general steel structure connecting mode has welding and bolt connecting, welding is divided into butt welding, angle welding, lap welding, etc., the requirement for a butt welding process is higher, and adoption of this welding mode is also the design requirements.
  • the plurality of aluminium sheet structures are arranged between the frameworks and are matched with the framework structures to form a streamer-shaped louver structure, and a gradient curve formed by the aluminium sheet units is continuously connected along a streamer-shaped curve.
  • the streamer-shaped louver structure is distinct in layer, and has both structures and gaps, so as to achieve a relatively good appearance, and then the twisted aluminium sheet having the gradient color has high artistry and high ornamental value.
  • the gradient curve formed by the aluminium sheet units is specifically as follows: each aluminium sheet structure is formed by splicing at least two twisted aluminium sheet units according to the design requirements, so as to form the gradient curve.
  • the framework structures and the fasteners are fastened on the building, and an anti-slip coefficient of connecting surfaces of the fasteners near the building is 0.45.
  • Abrasive blasting is to improve fatigue resistance of a workpiece, and increase adhesion between the workpiece and the coating.
  • the higher the anti-slip coefficient, the higher the structural safety, the higher the design requirements, and the 0.45 anti-slip coefficient is adopted and is more suitable for the gradient colors and strength requirements of connecting positions.
  • the adjacent aluminium sheet units are connected through connecting plates, the aluminium sheet units are respectively inserted into the connecting plates, no less than 4 anchor bolts are arranged on the connecting position of each aluminium sheet unit and the connecting plate, and a pulling resistant value of each anchor bolt is no less than 15 KN.
  • 100 aluminium sheet structure
  • 110 aluminium sheet unit
  • 200 framework structure
  • mounting should be understood broadly, for example, may be fixed connection, may also be detachable connection, or may be integrated connection; may be mechanical connection, may also be electrical connection; and may be direct connection, may also be indirection connection through an intermediate medium, or may be connection inside two elements.
  • the present embodiment is introduced in combination with main steps.
  • a processing and mounting method for a twisted aluminium sheet having a gradient color in the present embodiment includes the following steps:
  • the hollow aluminium sheet units are selected as a raw material, and meanwhile, the hollow aluminium sheet units are filled with the flexible fillers, so that stress on hollow aluminium sheets in a sheet twisting process is more uniform, and "the hollow sheets are filled with the flexible fillers, so that the stress in the sheet twisting process is more uniform", because a flexible material is at a ribbed sheet where the stress is easy to concentrate, concentrated stress can be dispersed and transferred very well.
  • aluminium sheet curtain wall hanging pieces are connected with a square steel rigid framework through fasteners, and the square steel rigid framework is connected with the steel structure building through connecting parts, so as to form an aluminium sheet curtain wall of a stable structure.
  • each aluminium sheet is formed by splicing the plurality of aluminium sheet units along grilles of the framework, to make variability of the aluminium sheet structure greater, and compared with an integrally-formed aluminium sheet structure, the aluminium sheet structure has stronger plasticity, and then a structure with a variety of colors and shapes may be formed.
  • the plurality of aluminium sheet units and connecting parts may be marked and colored successively according to design, and each aluminium sheet unit and each connecting part may be painted respectively according to marks and colors.
  • the present embodiment is introduced in combination with twisting of the aluminium sheet units.
  • the sheet rolling machine freely extends and retracts in a sheet length direction, so as to disperse stress in twisting.
  • an end of the sheet rolling machine may freely extend and retract in a sheet direction, so as to avoid longitudinal stress concentration. Further, the rolling sheet machine freely extends and retracts in a length direction.
  • the sheet is clamped between roller shafts of the sheet rolling machine, which is equivalent to limiting an XY direction in three-dimensional coordinates, but because the sheet is not clamped at ends, a Z direction is a free end and may freely extend and retract, and the Z direction (that is, the sheet length direction) will not obstruct free extending or shortening of the sheet in the twisting process, so that the problem of stress concentration will not appear.
  • the twisting machine performs twisting at least two times, and an angle of each time of twisting ranges from 1° to 5°.
  • a multi-time small-angle twisting process is adopted for sheet twisting, after rebound occurs in the process, multiple times of small-amount twisting continues to be performed, and an angle of single-time twisting does not exceed 5°, so that the angle is gradually close to a design value, and uncontrollable yield deformation is effectively overcome.
  • the flexible fillers are specifically of a tubular structure, a sheet structure or a hollow structure formed by the flexible material.
  • a plate, a pipeline or a hollow structure, etc. formed by a PVC material may be selected specifically, and is supported in each hollow aluminium sheet unit to form a supporting body, and at the same time, a concentrated stress condition may be uniformized.
  • a PVC pipe which is easy to obtain at a construction site, is generally selected, and it belongs to flexible materials, may uniformize the concentrated stress of the aluminium sheet, and is low in cost.
  • the method further includes pretreatment of the aluminium sheet units, and the pretreatment is increase of the length of the aluminium sheet units, so that the aluminium sheet units are twisted after the length is greater than 6 m.
  • the present invention solves the problem of the effective length of the twisted aluminium sheet by increasing the length of the sheet to 6 m and then twisting, and then cutting two ends of a deformed aluminium sheet to the design length.
  • the 2 m sheet may be directly twisted, but a final effective length cannot reach 2 m, and because the ends are prone to being damaged in the twisting process, herein, in order to ensure the effective length of the aluminium sheet, the 2 m sheet is lengthened and then twisted.
  • the painting of the aluminium sheet units is specifically as follows: the plurality of aluminium sheet units are divided into a plurality of aluminium sheet structures according to a design requirement of a gradient color, and the plurality of aluminium sheet units in each aluminium sheet structure are spliced successively to form the aluminium sheet structure having the gradient color.
  • a single complete curtain wall is formed by splicing 1 to 3 aluminium sheets, twisting angles of the spliced aluminium sheets are superimposed to achieve a gradient effect
  • a curtain wall at a northern end and a transition section of the building is a single-splicing curtain wall twisted by 90°
  • a curtain wall at a southern end is double-splicing curtain wall formed by splicing two aluminium sheets twisted by 0° to 90°
  • a main curtain wall in the middle is a three-splicing curtain wall formed by splicing two aluminium sheets twisted by 90° and a surface sheet.
  • painting treatment is specifically as follows: operations of primer spraying, color paint spraying, varnish spraying and baking on two sides are carried out in sequence respectively on each aluminium sheet unit; and operations of primer, intermediate paint, finish paint and finish-coat paint are carried out in sequence for each connecting part, and a total thickness of a dry paint film of a coating is greater than or equal to 150 ⁇ m.
  • a distance between frameworks ranges from 4 m to 4.5 m, and each framework structure is formed by a plurality of square steels, which are connected by butt welds in a transverse direction and/or a longitudinal direction.
  • a large gap range of the frameworks is that a width is about 4 m to 4.5 m and a height is about 2.5 m to 5 m
  • a general steel structure connecting mode has welding and bolt connecting, welding is divided into butt welding, angle welding, lap welding, etc., the requirement for a butt welding process is higher, and adoption of this welding mode is also the design requirements.
  • the plurality of aluminium sheet structures are arranged between gaps of the frameworks and are matched with the framework structures to form a streamer-shaped louver structure, and a gradient curve formed by the aluminium sheet units is continuously connected along a streamer-shaped curve.
  • the streamer-shaped louver structure is distinct in layer, and has both structure and gaps, so as to achieve a relatively good appearance, and then the twisted aluminium sheet having the gradient color has high artistry and high ornamental value.
  • each aluminium sheet structure is formed by splicing at least two twisted aluminium sheet units according to the design requirements, so as to form the gradient curve.
  • a plurality of times of assembly and splicing, etc. are used to avoid the problem that an aluminium sheet unit is directly twisted many times to form a curve, or is spray-coated many times to form gradient colors and then form a gradient curve, construction is easier, and the structure is more proper.
  • the framework structures and the fasteners are fastened on the building, and an anti-slip coefficient of connecting surfaces of the fasteners near the building is 0.45.
  • abrasive blasting is to improve fatigue resistance of a workpiece, and increase adhesion between the workpiece and a coating.
  • the higher the anti-slip coefficient, the higher the structural safety, the higher the design requirements, and the 0.45 anti-slip coefficient is adopted and is more suitable for the gradient colors and strength requirements of connecting positions.
  • the adjacent aluminium sheet units are connected through connecting plates, the aluminium sheet units are respectively inserted into the connecting plates, no less than 4 anchor bolts are arranged on the connecting position of each aluminium sheet unit and the connecting plate, and a pulling resistant value of each anchor bolt is not less than 15 KN.
  • the method also includes compensation for the aluminium sheet structure when the aluminium sheet structure is twisted by 180°, and the compensation is specifically as follows: an aluminium sheet structure after painting is formed by splicing the twisted aluminium sheet structure and the surface sheet.
  • the single complete curtain wall is formed by splicing 1 to 3 aluminium sheets according to the height of the curtain wall, and a twisting angle of the spliced aluminium sheet is superimposed to achieve a gradient effect.
  • the curtain wall at the northern end and the transition section of the building is the single-splicing curtain wall twisted by 90°
  • the curtain wall at the southern end is a double-splicing curtain formed by splicing two aluminium sheets twisted by 0° to 90°
  • the main curtain wall in the middle is the three-splicing curtain wall formed by splicing two aluminium sheets twisted by 90° and the surface sheet
  • the two twisted aluminium sheets in the three-splicing curtain wall are gradient-color control sheets
  • the surface sheet is a gradient-color compensation sheet
  • the control sheets control a twisting gradient curved surface through continuous length changes and quantitative cutting, with a length ranging from 50 mm to 4000 mm
  • the compensation sheet makes quantitative compensation according to a design length of the curtain wall, with a length ranging from 50 mm to 2200 mm.
  • the present embodiment is introduced in combination with specific construction.
  • the present invention is a manufacturing process of a twisted aluminium sheet of a building decoration material. Since a twisting radian of the aluminium sheet of a whole building curtain wall needs to be coordinated and coherent, and an outer hanging surface as a whole presents a streamer-shaped louver system, a length, a twisting angle and a splicing direction of each aluminium sheet need to be continuously changed, which puts forward extremely high requirements for fine processing and mounting of the aluminium sheet, and therefore, the present invention mainly solves the technical problems including continuous variable-radian twisting of the aluminium sheet and fine coordinated mounting of a gradient-color curved surface of the aluminium sheet. Referring to Figs.
  • each aluminium sheet structure 100 includes a plurality of aluminium sheet units 110 having gradient colors from top to bottom, at the same time, the aluminium sheet structure is from wide to narrow, then a middle faces an upper side and a lower side which are both of a sharp-corner structure, and then the middle continues downwards to form a wider structure. Specifically, a sharp-corner length of the lower side is greater than that of the upper side. Further, through the width change, it reflects a plurality of times of twisting of the whole aluminium sheet structure, and then a multi-twisting curve structure is formed.
  • the whole aluminium sheet structure forms a multi-wave curve structure again, and not only has the plurality of times of twisting, but also has a plurality of times of gradual changes from top to bottom and from left and right, and the appearance is beautiful.
  • the twisted aluminium sheet of the present invention is a hollow rectangular aluminium sheet made of a single aluminium sheet with a thickness of 4 mm, the original sheet is an aluminium-magnesium alloy with a series of 5005 and a state of H 2 4, a cross section is 40 mm ⁇ 350 mm, a length ranges from 50 mm to 4000 mm, and two longitudinal ribbed sheets are internally arranged, which may effectively reduce the dead weight of the sheet, reinforce a section feature thereof, improve whole rigidity, and facilitates prevention of deformation damage in the aluminium sheet twisting process.
  • the twisting angle of the aluminium sheet is about 0° to 90°, in which a twisting angle at a gradient-color curve surface position is near 90°.
  • a plurality of slots and holes are formed in the twisted aluminium sheet, and the twisted aluminium sheet is connected with vertical keels on a building external facade by galvanized connecting steel sheets and high-strength bolts.
  • the aluminium sheet is painted with a gold violet blue/gold red violet two-color chameleon four-sided spraying technology, one adjacent surface is sprayed with gold violet blue, the other adjacent surface is sprayed with gold red violet, and a painting process adopts fluorocarbon spraying treatment.
  • Aluminium sheet curtain wall hanging pieces are connected with the square steel rigid framework through the fasteners, and the square steel rigid framework is connected with the steel structure building through the connecting parts, thus forming the aluminium sheet curtain wall of the stable structure.
  • the square steel rigid framework is a large-gap grille structure, and adopts Q235 carbon structural steel, the square steels mainly have three models of 160*80*8 mm, 120*120*6 mm and 80*80*5 mm, the longitudinal and transverse square steels are connected through the butt welds, and fluorocarbon spraying anti-corrosion treatment is performed on surfaces.
  • the fasteners mainly include connecting plates, bolts, screws, studs, nuts, etc.
  • the high-strength bolts adopt 10.9-level friction type connecting high-strength bolts, a connecting surface is abrasively blasted, and an anti-slip coefficient is 0.45.
  • a twisted aluminium sheet processing apparatus adopts a fully hydraulic combination sheet rolling machine, front and rear ends are respectively a large-disc twisting machine and a three-roller sheet rolling machine, the large-disc twisting machine at the front end provides active twisting force, which may refine a twisting angle through an automatic numerical control system, and the three-roller sheet rolling machine at the rear end provides passive limiting force, which limits twisting displacement of the aluminium sheet, but releases longitudinal displacement of the sheet.
  • the project improves the sheet twisting processing technology, mainly including three aspects: (1) the hollow sheet is filled with a PVC pipe, so that stress in the sheet twisting process is more uniform, and especially a position near the ribbed sheet is smoother, so as to resist harmful plastic deformation caused by stress concentration in the middle of the sheet; (2) sheet twisting adopts a multi-time small-angle twisting process, after rebound appears in the process, multiple times of small-amount twisting continues to be performed, and an angle of single-time twisting does not exceed 5°, so as to make the angle gradually approach to a design value, thereby effectively overcoming uncontrollable yield deformation; and (3) the end of the sheet rolling machine may freely extend and retract in the sheet direction, so as to avoid longitudinal stress concentration.
  • the aluminium sheet with the design length (50 mm to 4000 mm) is adopted to be twisted, however, because the shorter the sheet, the worse the uniformity of twisting deformation, especially when the length is less than 2 m, the effective twisting length of the aluminium sheet is insufficient.
  • the present invention solves the problem of the effective length of the twisted aluminium sheet by increasing the sheet length to 6 m and then twisting, and then cutting two ends of the deformed aluminium sheet to the design length.
  • a formed aluminium sheet twisting process is assisted by a gold violet blue/gold red violet two-color chameleon spraying technology, and the process is three-spraying two-baking fluorocarbon spraying treatment.
  • Three-spraying refers to that three groups of spray guns are started during spraying, the first group of spray guns sprays primer, the second group of spray guns sprays color paint (fluorocarbon or polyester paint), and the third group of spray guns sprays protective top paint (varnish).
  • Two-baking refers to two times of baking of the aluminium sheet after three-spraying.
  • a sprayed aluminium-magnesium alloy profile has the characteristics of being excellent in corrosion resistance and weather resistance, firm and durable, beautiful for decoration, simple in production process, environmentally friendly, etc.
  • the connecting parts also adopt fluorocarbon spraying treatment.
  • a coating mainly includes primer, intermediate paint, finish paint and finish-coat paint.
  • a total thickness of a dry paint film of the coating is no less than 150 ⁇ m.
  • the aluminium sheet external hanging curtain wall adopts single splicing by a mobile crane, and splicing between aluminium sheets is through the connection of a plug-in galvanized steel connecting plate with upper and lower aluminium sheets by bolts, each connecting point has no less than 4 anchor bolts, a pulling resistant value of the anchor bolts is no less than 15 KN, and an anchoring safety level is 2.
  • the curtain wall aluminium sheet In order to present the gradient color effect, the curtain wall aluminium sheet needs to be twisted by 180°, however, due to the limitation of the performance of the aluminium sheet itself, a single piece of aluminium sheet cannot be twisted to 180° at one time, therefore, in the present invention, according to the height of the curtain wall, the single complete curtain wall is formed by splicing 1 to 3 aluminium sheets, and the twisting angles of the spliced aluminium sheets are superimposed to achieve the gradient effect.
  • a curtain wall at a northern end and a transition section of the building is a single-splicing curtain wall twisted by 90°
  • a curtain wall at a southern end is a double-splicing curtain wall formed by splicing two aluminium sheets twisted by 0° to 90°
  • a main curtain wall in the middle is a three-splicing curtain wall formed by splicing two aluminium sheets twisted by 90° and a surface sheet
  • the two twisted aluminium sheets in the three-splicing curtain wall are gradient-color control sheets
  • the surface sheet is a gradient-color compensation sheet
  • the control sheets control a twisting gradient curved surface through continuous length changes and quantitative cutting, with a length ranging from 50 mm to 4000 mm
  • the compensation sheet makes quantitative compensation according to a design length of the curtain wall, with a length ranging from 50 mm to 2200 mm.
  • the gradient curve control of the aluminium sheet curtain wall is a complex project with an extremely high precision requirement.
  • the present invention studies a professional numbering system, which systematically numbers all the aluminium sheets, and a numbering logic is shown in appendix 1.
  • the present invention adopts a multi-time small-angle twisting superposition process for aluminium sheet processing, in the manufacturing process, the problem of aluminium sheet yield deformation or uneven rebound margin which is prone to appearing in one-time twisting forming in the traditional process is solved, the former problem causes direct deformation damage of the aluminium sheet, the later problem causes an uncontrollable aluminium sheet twisting angle, and multi-time small-angle twisting may effectively control the rebound of the aluminium sheet through the bit-by-bit deformation accumulation and may precisely control the designed angle of the aluminium sheet.
  • the present invention effectively solves the problem of the deformation of the ends of the aluminium sheet by increasing an effective processing length of the aluminium sheet, and not arranging a stress end in a design length range of the aluminium sheet.
  • the flexible material makes stress in the sheet twisting process more uniform by filling the hollow sheet with the PVC pipe, and especially the position near the ribbed sheet is smoother, so as to resist the harmful plastic deformation caused by the stress concentration in the middle of the sheet.
  • the aluminium sheet curtain wall of the present invention mainly solves two major problems, one is connection and fixation of the twisted sheet, and the other is to cater to various connection angles.
  • the aluminium sheet curtain wall is connected by bolts, long kidney-shaped holes are formed in the connecting parts, not only is mounting simple and fast, but also straightness of the sheet adjusting on the spot is achieved, and a shortcoming of aluminium sheet deformation caused by excessive hot welding is overcome.
  • the aluminium sheet is mounted by adopting single-piece hoisting splicing, which has high operability and strong controllability, and is conducive to the control over the streamer-shaped gradient color effect of the aluminium sheet curtain wall.
  • the single aluminium sheets are not directly connected, but are connected with the rigid framework behind through high-strength bolts, and then the rigid framework is connected with the building.
  • Forming of the high kidney-shaped holes of bolts of the aluminium sheet and the rigid framework and single mounting of the aluminium sheet are for catering to the connecting angle.
  • the high kidney-shaped holes may adapt to an error of the length of the sheet by adjusting fixation positions of the bolts, and the single mounting may adjust the angle of the aluminium sheet on a plane.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Curtains And Furnishings For Windows Or Doors (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Load-Bearing And Curtain Walls (AREA)

Claims (9)

  1. Procédé de traitement et de montage pour une tôle d'aluminium déformée ayant un dégradé de couleur, comprenant les étapes suivantes :
    la déformation d'unités de tôle d'aluminium (110) :
    respectivement la déformation d'une pluralité d'unités de tôle d'aluminium (110) creuses, par le serrage d'une extrémité de chaque unité de tôle d'aluminium (110) au moyen d'une machine télescopique de laminage de tôle, et la déformation de l'autre extrémité au moyen d'une machine de déformation pour déformer l'unité de tôle d'aluminium (110) vers la machine de laminage de tôle le long de la direction de la machine de torsion jusqu'à ce que l'unité de tôle d'aluminium (110) soit déformée selon un angle conçu ; caractérisé en ce que la déformation de tôle adopte un processus de déformation à petit angle à multiples occurrences, après qu'un rebond apparaît dans le processus, de multiples occurrences de déformation de faible quantité continuent d'être réalisées, et un angle de la déformation en une occurrence ne dépasse pas 5°, lorsque l'angle conçu est supérieur à 5°, la machine de déformation réalise une déformation au moins à deux occurrences, et un angle de chaque occurrence de déformation varie de 1° à 5°, et le remplissage des unités de tôle d'aluminium (110) creuses avec des charges flexibles ;
    la peinture des unités de tôle d'aluminium (110) :
    respectivement la peinture des unités de tôle d'aluminium (110) selon une exigence de conception d'un dégradé de couleur ;
    la construction de structures d'ossature (200) : la fourniture des structures d'ossature (200) en forme de grille le long de l'extérieur d'un bâtiment selon des exigences de conception, les structures d'ossature (200) étant fixées sur le bâtiment ; et
    l'assemblage de structures de tôle d'aluminium (100) : la fourniture d'au moins une structure de tôle d'aluminium (100) sur chaque structure d'ossature (200) en forme de grille de haut en bas, les structures de tôle d'aluminium (100) étant formées par la jonction d'au moins deux unités de tôle d'aluminium (110) peintes.
  2. Procédé de traitement et de montage selon la revendication 1,
    caractérisé en ce que, à l'étape de déformation des unités de tôle d'aluminium (110), la machine de laminage de tôle s'étend et se rétracte librement dans une direction de longueur de tôle, de façon à disperser les contraintes lors de la déformation.
  3. Procédé de traitement et de montage selon la revendication 1,
    caractérisé en ce que les charges flexibles sont spécifiquement d'une structure tubulaire, d'une structure de tôle ou d'une structure creuse formée par des matériaux flexibles.
  4. Procédé de traitement et de montage selon la revendication 1,
    caractérisé en ce que, à l'étape de déformation des unités de tôle d'aluminium (110), lorsqu'une longueur des unités de tôle d'aluminium (110) est inférieure à 2 m, le procédé comprend en outre le prétraitement des unités de tôle d'aluminium, et le prétraitement est une augmentation de la longueur des unités de tôle d'aluminium (110), de sorte que les unités de tôle d'aluminium (110) soient déformées après que la longueur est supérieure à 6 m.
  5. Procédé de traitement et de montage selon la revendication 1,
    caractérisé en ce que la peinture des unités de tôle d'aluminium (110) est spécifiquement comme suit : la pluralité d'unités de tôle d'aluminium (110) sont divisées en une pluralité de structures de tôle d'aluminium (100) selon l'exigence de conception du dégradé de couleur, et la pluralité d'unités de tôle d'aluminium (110) dans chaque structure de tôle d'aluminium (100) sont jointes successivement pour former une structure de tôle d'aluminium (100) ayant un dégradé de couleur.
  6. Procédé de traitement et de montage selon la revendication 1,
    caractérisé en ce que, à l'étape de construction des structures d'ossature (200), une distance entre ossatures varie de 4 m à 4,5 m, et chaque structure d'ossature (200) est formée par une pluralité d'aciers carrés, qui sont reliés par des soudures bout à bout dans une direction transversale et/ou une direction longitudinale.
  7. Procédé de traitement et de montage selon la revendication 6,
    caractérisé en ce qu'une pluralité de structures de tôle d'aluminium (100) sont agencées entre les ossatures et sont mise en concordance avec les structures d'ossature (200) pour former une structure de persienne en forme de banderole, et une courbe de dégradé formée par les unités de tôle d'aluminium (110) est reliée en continu le long d'une courbe en forme de banderole.
  8. Procédé de traitement et de montage selon la revendication 7,
    caractérisé en ce que la courbe de dégradé formée par les unités de tôle d'aluminium (110) est spécifiquement comme suit : chaque structure de tôle d'aluminium (100) est formée par la jonction d'au moins deux unités de tôle d'aluminium (110) déformées selon les exigences de conception, pour former la courbe de dégradé.
  9. Procédé de traitement et de montage selon la revendication 1,
    caractérisé en ce que, à l'étape d'assemblage des structures de tôle d'aluminium (100), les unités de tôle d'aluminium (110) sont déplacées jusqu'à une position de conception dans un mode de levage, et sont jointes en combinaison avec des plaques de liaison et des boulons d'ancrage.
EP22918270.4A 2022-01-07 2022-10-31 Procédé de traitement et de montage pour feuille d'aluminium torsadée présentant une couleur de gradient Active EP4390001B1 (fr)

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CN202210012941.1A CN114439140B (zh) 2022-01-07 2022-01-07 一种渐变色扭转铝板的加工安装方法
PCT/CN2022/128550 WO2023130818A1 (fr) 2022-01-07 2022-10-31 Procédé de traitement et de montage pour feuille d'aluminium torsadée présentant une couleur de gradient

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CN114439140B (zh) * 2022-01-07 2024-02-13 中交第三航务工程局有限公司 一种渐变色扭转铝板的加工安装方法
CN115126256B (zh) * 2022-07-08 2023-03-31 中国建筑第二工程局有限公司 一种装配式菱形弯曲幕墙的施工方法
CN115749300B (zh) * 2022-10-17 2023-10-24 北京凌云宏达幕墙工程有限公司 一种渐变铝板线条铝板可调的安装方法
CN119843817B (zh) * 2024-12-31 2025-06-24 北京建工集团有限责任公司 一种超长弧形铝板测量定位安装方法

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JPH05179708A (ja) * 1992-01-07 1993-07-20 Toshiro Suzuki シェル構造物の構築方法
JP2006299658A (ja) * 2005-04-21 2006-11-02 Shimizu Corp カーテンウォール
DE102008028988B4 (de) * 2008-06-20 2012-02-23 Fiber-Tech Construction Gmbh Fassadengestaltung mit Kunststofflamellen- und Halterungselementen
JP5529898B2 (ja) * 2009-02-19 2014-06-25 キアン ヨン ヘン 中空棒材の捻り加工方法
CN204343565U (zh) * 2014-06-19 2015-05-20 上海绿地建设(集团)有限公司 一种条形铝板遮阳装置及条形铝板的扭转设备
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CN205444599U (zh) * 2015-12-31 2016-08-10 四川省特丽达实业有限公司 铝蜂窝幕墙
CN206128392U (zh) * 2016-09-27 2017-04-26 江河创建集团股份有限公司 立方体单元扭曲旋转式铝板幕墙系统
CN107882220A (zh) * 2017-10-31 2018-04-06 广州市恒盛建设工程有限公司 一种l形双翼式双曲铝板幕墙的施工方法
CN207974305U (zh) * 2018-03-07 2018-10-16 骆达利（天津）科技有限公司 多面叠拼心形立体装饰幕墙
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EP4390001A1 (fr) 2024-06-26

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