CN116241056A - High-precision manufacturing process and device for special-shaped complex curved surface mesh - Google Patents

High-precision manufacturing process and device for special-shaped complex curved surface mesh Download PDF

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Publication number
CN116241056A
CN116241056A CN202211434590.XA CN202211434590A CN116241056A CN 116241056 A CN116241056 A CN 116241056A CN 202211434590 A CN202211434590 A CN 202211434590A CN 116241056 A CN116241056 A CN 116241056A
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China
Prior art keywords
welding
support
net
shell
rod
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CN202211434590.XA
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Chinese (zh)
Inventor
李茂华
顾树彬
李威
赵福俊
张龙
邢彦超
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China First Metallurgical Group Co Ltd
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China First Metallurgical Group Co Ltd
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Priority to CN202211434590.XA priority Critical patent/CN116241056A/en
Publication of CN116241056A publication Critical patent/CN116241056A/en
Pending legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G1/00—Scaffolds primarily resting on the ground
    • E04G1/02—Scaffolds primarily resting on the ground composed essentially of members elongated in one dimension only, e.g. poles, lattice masts, with or without end portions of special form, connected together by any means
    • E04G1/04—Scaffolds primarily resting on the ground composed essentially of members elongated in one dimension only, e.g. poles, lattice masts, with or without end portions of special form, connected together by any means the members being exclusively poles, rods, beams, or other members of similar form and simple cross-section
    • E04G1/06—Scaffolds primarily resting on the ground composed essentially of members elongated in one dimension only, e.g. poles, lattice masts, with or without end portions of special form, connected together by any means the members being exclusively poles, rods, beams, or other members of similar form and simple cross-section comprising members with rod-like or tubular portions fitting together end to end, with or without separate connecting pieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
    • B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G1/00—Scaffolds primarily resting on the ground
    • E04G1/18—Scaffolds primarily resting on the ground adjustable in height
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G1/00—Scaffolds primarily resting on the ground
    • E04G1/24—Scaffolds primarily resting on the ground comprising essentially special base constructions; comprising essentially special ground-engaging parts, e.g. inclined struts, wheels
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/14—Conveying or assembling building elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/14—Conveying or assembling building elements
    • E04G21/16—Tools or apparatus
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G5/00—Component parts or accessories for scaffolds
    • E04G5/16—Struts or stiffening rods, e.g. diagonal rods
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C2700/00—Cranes
    • B66C2700/03—Cranes with arms or jibs; Multiple cranes
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G1/00—Scaffolds primarily resting on the ground
    • E04G1/24—Scaffolds primarily resting on the ground comprising essentially special base constructions; comprising essentially special ground-engaging parts, e.g. inclined struts, wheels
    • E04G2001/248—Inclined struts

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)

Abstract

The invention discloses a high-precision manufacturing process and a using device of a special-shaped complex curved surface net piece, wherein the high-precision manufacturing process comprises the following steps: s100: establishing a three-dimensional model of the space structure of the reticulated shell, deepening the design of the construction diagram of the reticulated shell rod piece and the partition unit net piece, and finally, deriving the dimension of the reticulated shell steel beam and the coordinates of the control points and processing; s200: designing a net shell processing jig frame, dividing a unit installation area, performing multi-round deep design to obtain a preferred scheme, and determining a construction method and a process flow; s300: the height of the adjustable jig frame is adjusted and then welded; s400: the installed local latticed shell structure is cooperatively hoisted by adopting a double-machine-table crane; s500: measuring and controlling precision; s600: welding and forming; s700: and (5) installing a glass curtain wall. Through set up high adjustable device in combination stand top, the effectual adaptability that improves equipment has solved among the traditional method when supporting the high technical problem who needs to be changed whole stand temporarily when not enough, and realizes supporting high continuous adjustment through screw transmission, and accommodation is more comprehensive.

Description

High-precision manufacturing process and device for special-shaped complex curved surface mesh
Technical Field
The utility model belongs to the technical field of high-precision mesh manufacturing, and particularly relates to a high-precision manufacturing process and device for a special-shaped complex curved mesh.
Background
The grid structure of the large-span space is now an important sign of the national building level and is also a symbol of the national civilization degree. The grid structure building is from nothing to large, from simple to diversification and complicacy of present form, and the installation construction that brings huge challenge for grid structure, and large-span complicated curved surface net shell shaped steel structure is mostly box cross-section, and is different with general building structure, and this kind of structure has characteristics such as high height, span is big, structural defect sensitivity is high, to the single-layer net shell steel structure system of this huge, how to realize the accurate installation in scene is the heavy and difficult point in the construction, therefore, proposes a instrument or method that can realize quick, accurate high-efficient supplementary installation large-scale single-layer net shell steel structure has important meaning.
Chinese patent No. CN108571075B discloses a method for erecting a stepped platform of a large-span net shell assembly jig, comprising the following steps: a. a horizontal support bracket (2) is arranged on a chord bolt ball on a three-center cylindrical surface net shell, the bracket adopts a net rack rod form, b, a main frame girder (14) on the inner side of each layer of platform is fixed by welding a suspension rod (4) on an outer main frame girder of an upper layer of platform, c, small square steel pipes are paved at intervals of 0.3m through length in the length direction of the upper part of a secondary girder of the main frame for encryption, d, a simple climbing ladder is arranged between each layer of platform to form an upper channel and a lower channel, so that constructors can conveniently go up and down to form a complete usable operating platform; in addition, chinese patent No. CN215717389U discloses an adjustable single-layer reticulated shell ground-assembled jig which comprises two jig units, each comprising a support frame, a connecting assembly, a fixing assembly and a locking member. The support frame comprises two support legs; the connecting assembly comprises a connecting sleeve and a connecting rod, the connecting sleeve is positioned at the top end of each supporting leg and is welded and connected with each supporting leg, external threads are arranged on the outer circumferential surface of the connecting sleeve, and the connecting rod is assembled on the connecting sleeve in a rotating manner along the circumferential direction of the connecting sleeve; the fixing assembly comprises a fixing block and two clamping plates, wherein an opening is arranged in the fixing block downwards and is in threaded connection with the connecting sleeve to form a threaded blind hole, the clamping plates are arranged on the fixing block, and the two clamping plates and the fixing block form a clamping groove; the retaining member is arranged on the fixed block.
The supporting operation of the latticed shell structure is realized by erecting the jig frame supporting platform in the above patent technology, but the following technical problems still exist: (1) The construction environment of the large-span, multi-curved surface, single-layer and multi-span reticulated shell structure needs to reduce the use amount of the temporary support frame as much as possible on the basis of ensuring the support capability; (2) The traditional support jig frame cannot realize local fine adjustment, so that the installation and the positioning of the curved net shell cannot be realized, and an auxiliary support adjusting unit with adjustable support height is required to be designed, so that the technical effects of more matching and convenience are realized; (3) If the traditional large-scale jig support method is adopted, a large amount of jigs are required to be erected on a construction site and large-tonnage hoisting equipment is adopted, the stability of the jigs is difficult to ensure, the turnover material amount of the jigs is required to be additionally increased, temporary reinforcement of complex curved surfaces cannot be efficiently completed, the cost and the cost are obviously increased, and the lifting and hoisting after the integral installation of the net shell are difficult to realize due to the limitation of the weight of the structure.
Disclosure of Invention
Aiming at the defects or improvement demands of the prior art, the invention provides a high-precision manufacturing process of a special-shaped complex curved surface net piece, which comprises the following steps:
S100: utilizing a computer aided design technology to establish a three-dimensional model of the space structure of the net shell, carrying out simulated unloading stress analysis and deformation calculation on the hoisting net piece truss and the assembled net shell, continuously optimizing the net shell design, deepening the net shell rod piece and partition unit net piece construction drawing design, finally leading out the net shell steel beam size and the control point coordinates, and processing the net shell rod piece;
s200: designing a net shell processing jig frame, dividing a unit installation area, performing multi-wheel deep design to obtain a preferred scheme, determining a construction method and a process flow, and assembling an adjustable jig frame on the ground, wherein the adjustable jig frame has a height adjusting function;
s300: the method comprises the steps of organizing mechanical equipment tools, entering a field of constructors, preparing single-piece latticed shell welding construction, adjusting the height of an adjustable jig, welding steel structure rods under the supporting action of the adjustable jig according to construction sequence to form a local latticed shell structure, adopting control measures on environmental conditions in the processing and welding processes, guaranteeing processing and welding quality, and finally achieving cost saving, guaranteeing quality, carrying out weld nondestructive testing according to national standard standards and guaranteeing to reach standards.
S400: the installed local latticed shell structure is cooperatively hoisted by adopting a double-machine-table crane;
S500: measuring and controlling precision;
s600: welding and forming;
s700: and (5) installing a glass curtain wall.
Further, the step S300 further includes:
s301: placing and positioning a first section of main rod on the jig frame, then arranging a baffle plate and welding and fixing the baffle plate and the main rod, so that the main rod is fixed on the jig frame;
s302: placing a main rod adjacent to the first section main rod on the jig frame, and fixing the main rod on the jig frame in the same way as the method;
s303: a supporting rod which is just connected between the two main rods is installed;
s304: a main rod axially abutted with the main rod of the first section is arranged on the tire frame, and the main rod is fixed on the tire frame
S305: installing adjacent main rods and installing the rigid-connection supporting rods among the main rods according to the sequence requirements
S306, repeating the process, installing the branch pipes which are communicated with the main pipe and the branch pipes after the hidden weld joint welding of the just-connected branch pipes is completed, and lifting the installed local latticed shell structure off the jig frame after all the welding is completed.
Further, the step S500 further includes:
s501, before hoisting the local latticed shell structural units, computer modeling is used to determine measurement control points of each group of hoisting units, three-axis coordinates corresponding to the observation points are calculated, a special reflection sheet for a total station is attached to the corresponding position of each hoisting unit, then the reflection sheet on each control point is observed by the total station, a spatial three-dimensional coordinate point is automatically calculated by a total station polar coordinate method, and compared with a theoretical value, so that the aim of controlling installation accuracy is achieved, at least 4 measurement control points are arranged on each group of hoisting units, one control point is respectively arranged at two ends of each hoisting unit, and one control point is arranged near each support point.
S502, lifting the lifting unit if deviation exists, pulling the net shell by using a chain block to carry out fine adjustment, and repairing the intersecting opening of the supporting steel pipe by using gas cutting so as to ensure the installation precision of the lifting unit;
s503, after the three-dimensional coordinates of the hoisting unit meet the requirements, welding the supporting steel pipe with the main chord pipe of the hoisting unit, wherein the supporting steel pipe is fully welded on the steel plate at the top of the support frame, and the size of a welding leg is not smaller than the wall thickness of the supporting steel pipe; full welding is required for the supporting steel pipe and the main chord pipe of the hoisting unit, and the size of a welding leg is equal to the wall thickness of the supporting steel pipe;
s504, the reflective sheets on each control point are used for settlement observation, monitoring is started after the installation of the roof reticulated shell, and monitoring is carried out once every week in the installation stage of the reticulated shell after the installation of the decorative surface layers such as the roof aluminum plate, the glass and the like are completed, and monitoring is carried out once every two days in the decoration construction stage of the roof in the unloading process;
and S505, measuring coordinates of the reflecting sheet attached to the center of the lower surface of the main rod node by using a total station to perform settlement observation so as to form a settlement observation curve.
Further, the step S600 includes the following steps:
s601, adjusting the position of a component by using a chain block, aligning a hoisting unit with an interface, keeping a gap of 5-8 mm, slowly falling a hook to enable the component to be slowly and lightly placed on a support short column and a concrete column top support, enabling a crane to bear 90% of the weight of the component at the moment, starting correction, raising a crank arm vehicle at the interface position at the moment, and preparing for welding by an electric welder;
S602, after correction is completed, the crane slowly drops the hook again, and after the crane bears 40% of the weight of the component, the hook is stopped to start welding;
s603, after welding of the concrete column top support and the ring beam support short column, firstly unhooking a crane close to one side of the concrete column, installing branch pipes, and installing at least 3 branch pipes on one group of hoisting units, so that a stable space structure system is formed by the installed hoisting units and the installed structure;
s604, when the welding of the butt joint main pipe of the butt joint is completed, after the installation of the 3 branch pipes is completed, the crane at the middle part removes the lifting hook, and the installation of the intersecting branch pipes at the butt joint position is completed;
s605, when a part of unit net sheets and rod pieces are installed to form a local net shell, the position coordinates and the elevation of the space nodes are measured and controlled, and the installation construction effect is ensured;
s606, reserving a mounting deviation and a stress deformation reserved area in construction, guaranteeing machining and mounting precision of the net shell structure mounting rod piece, guaranteeing elimination of the machining and mounting deviation, and achieving the effect of designing building modeling.
Further, the step S700 includes:
s701, firstly, an operator who transports the plate moves the plate to a designated hoisting position by using a forklift, and the plate is accurately placed in position and orientation, so that the electric glass sucker hook is convenient to reliably connect with a fixed wind rope;
S702, when the plate is about to travel to a designated installation position, informing a worker to control stopping rising and turning off a control switch of the crane, and then adjusting the specific position of the plate by using an auxiliary installation tool;
s703, after the elevation of the plate is basically in place, firmly connecting the aluminum alloy frame with the keel upright post by using an angle brace, then gradually adjusting until the position of the design requirement is reached, screwing up a connecting bolt to prevent the plate from loosening, and then putting down a hoisting steel rope;
s704, adjusting: after the glass plate is initially assembled, the horizontal beam of the plate is adjusted, and the glass seam is horizontal; vertical beams are vertical, and glass seams are glued and sealed vertically; after the outdoor adjustment, the glass is checked to see whether the flat place is flat or not and whether the size of each place meets the design requirement or not;
s705, fixing: the glass plate is fixed immediately after adjustment, mainly by an aluminum pressing strip. The holes are drilled when the layering is arranged, the distance is not more than 250mm, and the layering is arranged in a positive pressure way, so that loosening or water-proof adhesive tape falling off is avoided;
s706, checking and accepting: when glass is installed each time, from the installation process to the installation completion, the whole process is subjected to quality control, acceptance is inserted in the whole process, and the acceptance content is as follows: whether the plate has problems or not; whether the size of the glue line of the exposed frame glass curtain wall meets the design requirement or not; the acceptance record and the fixation of the aluminum press block belong to the range of the hidden engineering, and various data are required to be made according to the relevant regulations of the hidden engineering.
A device for using a high-precision manufacturing process of a special-shaped complex curved surface net sheet comprises:
the combined upright post is used for playing a main supporting role and comprises a section steel upright post, an upright post base, a connecting wheel buckle fixedly connected to the surface of the section steel upright post at a certain height and an upright post and scissor support connecting lug;
the combined jig frame cross beam is used for connecting, fixing and supporting;
the combined jig frame scissor stay comprises two circular tube scissor diagonal stay rods connected through a diagonal stay rod hinge shaft connecting shaft and a scissor stay and stand column lug plate connecting pin, wherein the scissor stay is used for fixedly connecting the end parts of the circular tube scissor diagonal stay rods to a section steel stand column;
the upright posts are fixedly arranged on the profile steel upright posts and are connected with the lug plates through the scissors supports;
further, the combination bed-jig crossbeam includes:
the device comprises a section steel beam connected to the connecting wheel buckle and provided with a transverse end insertion plate, and a height-adjustable device arranged above the section steel beam.
Further, the height-adjustable device includes:
the adjustable U support comprises an adjustable U support base fixedly arranged above a shaped steel beam, an adjustable U support column vertically fixedly connected above the adjustable U support base, a column reinforcing plate for reinforcing the adjustable U support column, an adjustable U support cross beam arranged at the upper end of the adjustable U support column, a column connecting plate fixed below the adjustable U support cross beam and used for reinforcing the adjustable U support column, an adjustable U support screw rod penetrating through the adjustable U support cross beam and connected with the adjustable U support cross beam, a fixed U support screw rod nut, a screw rod and a support connecting nut which are respectively arranged below the column connecting plate and above the U support cross beam reinforcing plate and used for achieving a spiral transmission connection effect, and a support U-shaped support plate arranged at the upper end of the adjustable U support screw rod and connected with the support U support reinforcing plate through a support U support connecting screw rod.
Furthermore, the support U-shaped support is connected with the screw rod reinforcing plate by using a full-length welding process.
In general, the above technical solutions conceived by the present invention, compared with the prior art, enable the following beneficial effects to be obtained:
1. according to the application device of the high-precision manufacturing process of the special-shaped complex curved surface net piece, the height-adjustable device is arranged above the combined upright post, so that the adaptability of equipment is effectively improved, the technical problem that the whole upright post needs to be replaced temporarily when the supporting height is insufficient in a traditional method is solved, high efficiency, convenience and high operability are achieved, continuous adjustment of the supporting height can be achieved through screw rod transmission, and the adjusting range is more comprehensive.
2. According to the device for using the high-precision manufacturing process of the special-shaped complex curved surface net piece, the supporting force of the jig frame is effectively improved by setting the triangular supporting structure, meanwhile, the technical defect that a large number of stand columns are needed in the traditional method is overcome, and the combined jig frame cross beam is fixedly arranged at the upper part, so that large-area support can be realized, and the technical effects of simplicity in installation and strong supporting and bearing capacity are achieved.
3. According to the high-precision manufacturing process of the special-shaped complex curved surface net piece, when the unit net piece and the rod piece are assembled and hoisted, a first part of supporting frame is firstly built, then a first unit net piece in a region is hoisted, the hoisting tool adopts two crawler cranes and adjusts the length of the first unit net piece according to a hoisting rope control length meter to test the hoisting, when the first unit net piece is separated from a processing jig frame by 30cm, the hoisting is stopped and is stopped for 8 minutes, the structure and the hoisting tool are observed, and the next operation can be carried out after the unit net piece is safe; secondly, posture adjustment and inclination adjustment: adjusting according to the state of the latticed shell in the design space, adjusting the length of the latticed shell by using a lifting rope, and monitoring the position coordinates and elevation of the latticed shell node by using a total station until the position reaches the design position and is welded and fixed with a support; after the first truss unit mesh is hung to a designated position, slowly descending to enable the unit mesh to be contacted with the first supporting position of the mounting support frame; after the support is in place, the rod piece at the support is welded with the support short column, and meanwhile, the central unit is subjected to backing welding, so that the installation accuracy is effectively improved; when the third truss unit mesh is installed, the method is the same as the above; the method comprises the steps of adjusting in place to reach a design position, firstly firmly welding three rod pieces connected with a first truss unit net piece, ensuring safety and stability, and welding and assembling the residual connecting rod pieces of the first truss unit net piece and a third truss unit net piece; then installing a fourth truss unit net, adopting double-crane or single-crane installation according to the weight and the length dimension, and adopting 50-ton automobile cranes to carry out rod supplementing lifting in a matching way; when the net sheet is hung to load and unload the hook, a safe and stable structure is required to be formed with the support and the net sheet support, and after the connection point is welded and is inspected to be qualified, the hook unloading operation can be started; when the hook is detached, the hook slowly descends, a crane driver monitors the hanging weight, when the hanging weight is reduced to 50 percent of the hanging weight, the structure and the support are observed after the crane is stationary for 5 minutes, and then the crane driver slowly descends again; when the weight is reduced to 25 percent of the hanging weight, the structure and the supporting safety condition are observed after the system is still for 5 minutes; ensuring that the safety rear part can be completely unloaded and unhooked; when the support frame is unloaded and removed: the first part of the supporting frame is installed, and meanwhile, the first part of the unit meshes and the rod pieces are assembled; when the second part of supporting frame, the unit net piece and the rod piece are installed to form a local net shell space structure, the first part of net shell supporting frame reduces the supporting point of the first part of supporting frame according to the construction flow, synchronously unloading, synchronously descending the adjustable hydraulic supporting device, simultaneously carrying out measurement and monitoring, comparing with the simulation calculation deformation horizontal displacement and the vertical deformation descending value and controlling the deformation horizontal displacement and the vertical deformation descending value within the allowable range; the third part of the bracket and the fourth part of the bracket are installed until the last bracket is installed; simultaneously, when a part of the support is installed, the unit meshes and the rod pieces are assembled to form a latticed shell structure; then unloading step by step according to the construction sequence and removing the support frame until all the support frames and the net shells in each area are installed, and removing the final support frame; when unloaded: and (3) assembling and welding a plurality of local unit meshes and rod pieces into a latticed shell space structure: the unloading condition is that the installation completion part, the support and the tree column are completely welded; the unit meshes and all the rod pieces are connected, the welding is completed, the welding lines are inspected to be qualified, the elevation of the space node of the installed net shell part is monitored to reach the design requirement and standard allowable deviation, and whether the branch welding lines of the support and the tree-shaped steel column are cracked or not; the deformation of the installed part of the latticed shell is within the design requirement range, and meets the specification requirement;
4. The high-precision manufacturing process of the special-shaped complex curved surface net piece realizes the measurement and monitoring control of the installation construction of the large-span complex curved surface single-layer steel net shell space structure, the measurement condition selects proper time for observation, the influence of temperature difference is prevented, the good state of a measuring instrument is ensured, the operation is carried out according to the specification, and the total station observation should be corrected by the temperature and the air pressure. Hanging the steel rule to transfer elevation, and correcting the steel rule according to an identification formula; at least 4 points are arranged at observation points of each group of hoisting units for control and monitoring; after a plurality of meshes are installed, checking the installation size, confirming the checking design requirement, feeding back the practical data of the re-measurement, comparing the practical data with the coordinates and the elevation of the design space position, carrying out welding flaw detection and paint repairing after the data comparison is confirmed to be correct, and carrying out unloading unit mesh support; after unloading is started, sequentially carrying out batch processing from north to south according to the actual condition of the construction, synchronously adjusting down a batch of adjustable hydraulic support frames according to retest data, immediately carrying out retest deflection change, carrying out retest on key node coordinates and elevations by using a total station, feeding back retest actual data, and carrying out checking calculation; the space nodes and the reticulated shell are monitored integrally; because the net shell is entirely formed into a space complex net shell structure by adopting a single-layer curved surface steel structure square tube, the net piece and the bulk rod piece are alternately assembled and installed according to a deepened design scheme during installation, and the net piece is adopted for inspection while being installed and is adjusted while being monitored, so that the installation error is eliminated as much as possible on the basis of the requirement of the processing progress. And (3) checking three-dimensional coordinates of each rod node of the roof reticulated shell one by adopting a total station, and ensuring that each rod and each net are installed and positioned within a standard allowable range. If the size of the super-sheet exceeds the allowable value, the super-sheet should be adjusted before the next process, so that the accuracy of installation is ensured.
Drawings
Fig. 1 is a schematic structural diagram of a multi-span combined bent frame supported by a device for use in a high-precision manufacturing process of a special-shaped complex curved mesh sheet according to an embodiment of the invention;
FIG. 2 is a schematic view of a beam structure of a combined jig frame of a device for high-precision manufacturing process of a special-shaped complex curved mesh according to an embodiment of the invention;
FIG. 3 is a schematic view of a height-adjustable U-shaped support elevation structure of a device for high-precision manufacturing process of special-shaped complex curved meshes according to an embodiment of the invention;
fig. 4 is a schematic structural diagram of a combined jig frame column of a using device of a high-precision manufacturing process of a special-shaped complex curved mesh according to an embodiment of the invention;
fig. 5 is a schematic structural diagram of a combined type scissors stay of a using device for a high-precision manufacturing process of a special-shaped complex curved surface mesh according to an embodiment of the invention;
fig. 6 is a schematic diagram of a hoisting structure of a high-precision manufacturing process of a special-shaped complex curved surface mesh according to an embodiment of the invention;
fig. 7 is a schematic diagram illustrating a detection of a high-precision manufacturing process of a special-shaped complex curved mesh according to an embodiment of the present invention.
Like reference numerals denote like technical features throughout the drawings, in particular: 1-combined upright posts, 101-section steel upright posts, 102-connecting wheel buckles, 103-upright post bases, 104-upright post and scissor support connecting lugs, 2-combined jig frame cross beams, 201-section steel beams, 202-adjustable height support U brackets, 203-transverse end insertion plates, 2201-adjustable U bracket screws, 2202-adjustable U bracket bases and 2203-adjustable U bracket upright posts; 2204-upright post reinforcing plate, 2205-adjustable U-support beam, 2206-upright post connecting plate, 2207-screw and bracket connecting nut, 2208-fixed U-support screw nut, 2209-U-support bracket beam reinforcing plate, 2210-support U-support connecting screw reinforcing plate, 2211-support U-support supporting plate, 3-combined jig frame scissor struts, 301-circular tube scissor diagonal braces, 302-diagonal brace hinge shaft connecting shaft, 303-scissor strut and upright post lug plate connecting pin, and 4-upright post and scissor strut connecting lug plate.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
As a first aspect of the present invention, in an embodiment of the present invention, the process for manufacturing a mesh with a special-shaped complex curved surface with high precision includes the following steps:
s100: utilizing a computer aided design technology to establish a three-dimensional model of the space structure of the net shell, carrying out simulated unloading stress analysis and deformation calculation on the hoisting net piece truss and the assembled net shell, continuously optimizing the net shell design, deepening the net shell rod piece and partition unit net piece construction drawing design, finally leading out the net shell steel beam size and the control point coordinates, and processing the net shell rod piece;
s200: designing a net shell processing jig frame, dividing a unit installation area, performing multi-wheel deep design to obtain a preferred scheme, determining a construction method and a process flow, and assembling an adjustable jig frame on the ground, wherein the adjustable jig frame has a height adjusting function;
S300: the method comprises the steps of organizing mechanical equipment tools, entering a field of constructors, preparing single-piece latticed shell welding construction, adjusting the height of an adjustable jig, welding steel structure rods under the supporting action of the adjustable jig according to construction sequence to form a local latticed shell structure, adopting control measures on environmental conditions in the processing and welding processes, guaranteeing processing and welding quality, and finally achieving cost saving, guaranteeing quality, carrying out weld nondestructive testing according to national standard standards and guaranteeing to reach standards.
S400: the installed local latticed shell structure is cooperatively hoisted by adopting a double-machine-table crane;
s500: measuring and controlling precision;
s600: welding and forming;
s700: and (5) installing a glass curtain wall.
In the embodiment of the present invention, the step S300 further includes:
s301: placing and positioning a first section of main rod on the jig frame, then arranging a baffle plate and welding and fixing the baffle plate and the main rod, so that the main rod is fixed on the jig frame;
s302: placing a main rod adjacent to the first section main rod on the jig frame, and fixing the main rod on the jig frame in the same way as the method;
s303: a supporting rod which is just connected between the two main rods is installed;
s304: a main rod axially abutted with the main rod of the first section is arranged on the tire frame, and the main rod is fixed on the tire frame
S305: installing adjacent main rods and installing the rigid-connection supporting rods among the main rods according to the sequence requirements
S306, repeating the process, installing the branch pipes which are communicated with the main pipe and the branch pipes after the hidden weld joint welding of the just-connected branch pipes is completed, and lifting the installed local latticed shell structure off the jig frame after all the welding is completed.
In the embodiment of the present invention, the step S400 includes:
s401: assembling and hoisting the unit meshes and the rod pieces: firstly, building a first part of supporting frame, then lifting a first unit mesh in a region, adjusting the length of a lifting appliance by adopting two crawler cranes according to a lifting rope control length meter, stopping lifting when the first unit mesh is separated from a processing jig frame by 30cm, standing for 8 minutes, observing a structure and the lifting appliance, and carrying out the next operation after the safety; secondly, posture adjustment and inclination adjustment: adjusting according to the state of the latticed shell in the design space, adjusting the length of the latticed shell by using a lifting rope, and monitoring the position coordinates and elevation of the latticed shell node by using a total station until the position reaches the design position and is welded and fixed with a support; after the first truss unit mesh is hung to a designated position, slowly descending to enable the unit mesh to be contacted with the first supporting position of the mounting support frame; after being in place, the rod piece at the support is welded with the support short column, and the central unit is welded in a bottoming way;
S402, installing a second truss unit mesh, wherein the method is the same as that of the first truss unit mesh; one end is welded with the support, the other end is butted with the first transverse end, and the space position coordinates and the elevation are adjusted to reach the design position; is connected through butt welding; filling end net shell rod pieces;
s403, installing a third truss unit mesh, wherein the method is the same as that described above; the method comprises the steps of adjusting in place to reach a design position, firstly firmly welding three rod pieces connected with a first truss unit net piece, ensuring safety and stability, and welding and assembling the residual connecting rod pieces of the first truss unit net piece and a third truss unit net piece; then installing a fourth truss unit net, adopting double-crane or single-crane installation according to the weight and the length dimension, and adopting 50-ton automobile cranes to carry out rod supplementing lifting in a matching way; when the net sheet is hung to load and unload the hook, a safe and stable structure is required to be formed with the support and the net sheet support, and after the connection point is welded and is inspected to be qualified, the hook unloading operation can be started; when the hook is detached, the hook slowly descends, a crane driver monitors the hanging weight, when the hanging weight is reduced to 50 percent of the hanging weight, the structure and the support are observed after the crane is stationary for 5 minutes, and then the crane driver slowly descends again; when the weight is reduced to 25 percent of the hanging weight, the structure and the supporting safety condition are observed after the system is still for 5 minutes; ensuring that the safety rear part can be completely unloaded and unhooked;
S404, unloading and dismantling the support frame: the first part of the supporting frame is installed, and meanwhile, the first part of the unit meshes and the rod pieces are assembled; when the second part of supporting frame, the unit net piece and the rod piece are installed to form a local net shell space structure, the first part of net shell supporting frame reduces the supporting point of the first part of supporting frame according to the construction flow, synchronously unloading, synchronously descending the adjustable hydraulic supporting device, simultaneously carrying out measurement and monitoring, comparing with the simulation calculation deformation horizontal displacement and the vertical deformation descending value and controlling the deformation horizontal displacement and the vertical deformation descending value within the allowable range; the third part of the bracket and the fourth part of the bracket are installed until the last bracket is installed; simultaneously, when a part of the support is installed, the unit meshes and the rod pieces are assembled to form a latticed shell structure; then unloading step by step according to the construction sequence and removing the support frame until all the support frames and the net shells in each area are installed, and removing the final support frame;
s405, unloading technical requirements: and (3) assembling and welding a plurality of local unit meshes and rod pieces into a latticed shell space structure: the unloading condition is that the installation completion part, the support and the tree column are completely welded; the unit meshes and all the rod pieces are connected, the welding is completed, the welding lines are inspected to be qualified, the elevation of the space node of the installed net shell part is monitored to reach the design requirement and standard allowable deviation, and whether the branch welding lines of the support and the tree-shaped steel column are cracked or not; the deformation of the installed part of the latticed shell is within the design requirement range, and meets the specification requirement;
S406, reserving an installation deviation and deformation adjustment control area, and when a large-span complex curved surface single-layer latticed shell space structure is installed, especially installing and constructing a multi-span space latticed shell structure, presetting the installation deviation and deformation control area, wherein the engineering is arranged in three areas; when the first-area unit reticulated shell and the second-area unit reticulated shell are installed, measuring and checking the actual space dimensions of the three-area net sheet, the rod piece and the tree column; when the installation deviation and deformation exceed the allowable range, the center design and adjustment are carried out on the three-area unit net shell and the rod piece; the net piece and the rod piece are processed and manufactured according to the adjustment design; installing according to the construction sequence and the flow of the construction scheme, wherein the installation method is the same as that described above;
s407: the large-span complex curved surface single-layer steel latticed shell space structure is processed, manufactured, installed and welded, and the welding quality is controlled by adopting reasonable welding directions and sequences; when the structure is symmetrical, a symmetrical welding method is adopted; when the weld is more and more concentrated; dispersing and heating by adopting a skip welding method to prevent concentrated heating; a long welding line larger than 1 meter adopts a segmented back welding method; firstly welding an expanded welding line, and then welding a welding line with small expansion; firstly welding a short seam, then welding a long seam, so that the welding seam has a large enough transverse contraction space, and in order to ensure that the welding seam with larger stress has a certain expansion space after welding, firstly welding a main welding seam with larger stress, then welding a secondary welding seam with smaller stress, and carrying out a reverse deformation method; in order to reduce welding deformation, a pre-deformation opposite to the welding deformation can be reserved before welding, and the pre-deformation is preheated; before welding, the whole or part of the welding piece is heated to 100-300 ℃, and the non-uniformity degree of the temperature change of the welding seam can be reduced by the method, so that the risk of crack generation caused by the temperature change is reduced, and the welding piece is tempered at a high temperature; a high-temperature tempering method is used for reducing welding deformation after welding; the high temperature tempering method is to heat the welding component to 600-650 ℃ and wait for slow cooling; if the welding member is smaller, the whole welding member can be tempered at high temperature, the steel is basically deformed very little because the temperature reached by heating reaches the thermoplastic temperature of the steel, namely most of welding deformation is eliminated, if the welding member is larger, the whole welding member is inconvenient to temper at high temperature, and only the part near the welding seam or the part with larger welding stress can be tempered at local high temperature, so that the welding deformation can be reduced;
S408: the large-span complex curved surface single-layer steel net shell space structure installation construction measurement monitoring control, the measurement condition selects proper time for observation, the influence of temperature difference is prevented, the good state of a measuring instrument is ensured, and the total station observation temperature and air pressure correction is carried out according to standard operation. Hanging the steel rule to transfer elevation, and correcting the steel rule according to an identification formula; at least 4 points are arranged at observation points of each group of hoisting units for control and monitoring; after a plurality of meshes are installed, checking the installation size, confirming the checking design requirement, feeding back the practical data of the re-measurement, comparing the practical data with the coordinates and the elevation of the design space position, carrying out welding flaw detection and paint repairing after the data comparison is confirmed to be correct, and carrying out unloading unit mesh support; after unloading is started, sequentially carrying out batch processing from north to south according to the actual condition of the construction, synchronously adjusting down a batch of adjustable hydraulic support frames according to retest data, immediately carrying out retest deflection change, carrying out retest on key node coordinates and elevations by using a total station, feeding back retest actual data, and carrying out checking calculation; the space nodes and the reticulated shell are monitored integrally; because the net shell is entirely formed into a space complex net shell structure by adopting a single-layer curved surface steel structure square tube, the net piece and the bulk rod piece are alternately assembled and installed according to a deepened design scheme during installation, and the net piece is adopted for inspection while being installed and is adjusted while being monitored, so that the installation error is eliminated as much as possible on the basis of the requirement of the processing progress. And (3) checking three-dimensional coordinates of each rod node of the roof reticulated shell one by adopting a total station, and ensuring that each rod and each net are installed and positioned within a standard allowable range. If the superstrate size is found to exceed the allowable value, it should be adjusted before the next process.
S409, mounting deformation control of a large-span complex curved surface single-layer steel reticulated shell space structure, adopting an assembly jig, checking the position, radian and angle conditions of the jig according to a construction drawing after the assembly jig is arranged, and assembling components after retesting; calculating various deformation amounts by software in advance, and adopting anti-deformation measures to ensure that the installation deformation deviation meets the standard requirement; advanced processing equipment is adopted, so that the blanking precision is ensured; the group positioning adopts a total station to accurately position the coordinates of each node of the truss; after the assembly on the jig frame is completed, all the constraints on the truss are released, so that the truss is in a free state, and all the sizes of the hoisting units are measured in the free state, so that the assembly net sheets and the net shell are ensured to be installed to meet the design requirements.
In the embodiment of the present invention, the step S500 further includes:
s501, before hoisting the local latticed shell structural units, computer modeling is used to determine measurement control points of each group of hoisting units, three-axis coordinates corresponding to the observation points are calculated, a special reflection sheet for a total station is attached to the corresponding position of each hoisting unit, then the reflection sheet on each control point is observed by the total station, a spatial three-dimensional coordinate point is automatically calculated by a total station polar coordinate method, and compared with a theoretical value, so that the aim of controlling installation accuracy is achieved, at least 4 measurement control points are arranged on each group of hoisting units, one control point is respectively arranged at two ends of each hoisting unit, and one control point is arranged near each support point.
S502, lifting the lifting unit if deviation exists, pulling the net shell by using a chain block to carry out fine adjustment, and repairing the intersecting opening of the supporting steel pipe by using gas cutting so as to ensure the installation precision of the lifting unit;
s503, after the three-dimensional coordinates of the hoisting unit meet the requirements, welding the supporting steel pipe with the main chord pipe of the hoisting unit, wherein the supporting steel pipe is fully welded on the steel plate at the top of the support frame, and the size of a welding leg is not smaller than the wall thickness of the supporting steel pipe; full welding is required for the supporting steel pipe and the main chord pipe of the hoisting unit, and the size of a welding leg is equal to the wall thickness of the supporting steel pipe;
s504, the reflective sheets on each control point are used for settlement observation, monitoring is started after the installation of the roof reticulated shell, and monitoring is carried out once every week in the installation stage of the reticulated shell after the installation of the decorative surface layers such as the roof aluminum plate, the glass and the like are completed, and monitoring is carried out once every two days in the decoration construction stage of the roof in the unloading process;
and S505, measuring coordinates of the reflecting sheet attached to the center of the lower surface of the main rod node by using a total station to perform settlement observation so as to form a settlement observation curve.
In the embodiment of the present invention, the step S600 includes the following steps:
s601, adjusting the position of a component by using a chain block, aligning a hoisting unit with an interface, keeping a gap of 5-8 mm, slowly falling a hook to enable the component to be slowly and lightly placed on a support short column and a concrete column top support, enabling a crane to bear 90% of the weight of the component at the moment, starting correction, raising a crank arm vehicle at the interface position at the moment, and preparing for welding by an electric welder;
S602, after correction is completed, the crane slowly drops the hook again, and after the crane bears 40% of the weight of the component, the hook is stopped to start welding;
s603, after welding of the concrete column top support and the ring beam support short column, firstly unhooking a crane close to one side of the concrete column, installing branch pipes, and installing at least 3 branch pipes on one group of hoisting units, so that a stable space structure system is formed by the installed hoisting units and the installed structure;
s604, when the welding of the butt joint main pipe of the butt joint is completed, after the installation of the 3 branch pipes is completed, the crane at the middle part removes the lifting hook, and the installation of the intersecting branch pipes at the butt joint position is completed;
s605, when a part of unit net sheets and rod pieces are installed to form a local net shell, the position coordinates and the elevation of the space nodes are measured and controlled, and the installation construction effect is ensured;
s606, reserving a mounting deviation and a stress deformation reserved area in construction, guaranteeing machining and mounting precision of the net shell structure mounting rod piece, guaranteeing elimination of the machining and mounting deviation, and achieving the effect of designing building modeling.
In the embodiment of the present invention, the step S700 includes:
s701, firstly, an operator who transports the plate moves the plate to a designated hoisting position by using a forklift, and the plate is accurately placed in position and orientation, so that the electric glass sucker hook is convenient to reliably connect with a fixed wind rope;
S702, when the plate is about to travel to a designated installation position, informing a worker to control stopping rising and turning off a control switch of the crane, and then adjusting the specific position of the plate by using an auxiliary installation tool;
s703, after the elevation of the plate is basically in place, firmly connecting the aluminum alloy frame with the keel upright post by using an angle brace, then gradually adjusting until the position of the design requirement is reached, screwing up a connecting bolt to prevent the plate from loosening, and then putting down a hoisting steel rope;
s704, adjusting: after the glass plate is initially assembled, the horizontal beam of the plate is adjusted, and the glass seam is horizontal; vertical beams are vertical, and glass seams are glued and sealed vertically; after the outdoor adjustment, the glass is checked to see whether the flat place is flat or not and whether the size of each place meets the design requirement or not;
s705, fixing: the glass plate is fixed immediately after adjustment, mainly by an aluminum pressing strip. The holes are drilled when the layering is arranged, the distance is not more than 250mm, and the layering is arranged in a positive pressure way, so that loosening or water-proof adhesive tape falling off is avoided;
s706, checking and accepting: when glass is installed each time, from the installation process to the installation completion, the whole process is subjected to quality control, acceptance is inserted in the whole process, and the acceptance content is as follows: whether the plate has problems or not; whether the size of the glue line of the exposed frame glass curtain wall meets the design requirement or not; the acceptance record and the fixation of the aluminum press block belong to the range of the hidden engineering, and various data are required to be made according to the relevant regulations of the hidden engineering.
As shown in fig. 1 to 7, as a second aspect of the present invention, in an embodiment of the present invention, an apparatus for a high-precision manufacturing process of a special-shaped complex curved mesh sheet includes:
the combined upright 1 for playing a main supporting role comprises a section steel upright 101, an upright base 103, a connecting wheel buckle 102 fixedly connected to the surface of the section steel upright 101 at a certain height and upright and scissor-supporting connecting lugs 104;
a combined jig frame cross beam 2 for connection, fixation and support;
the combined jig frame scissor stay 3 comprises two circular tube scissor diagonal stay 301 connected through a diagonal stay hinge shaft connecting shaft 302 and a scissor stay and stand lug plate connecting pin 303 used for fixedly connecting the end part of the circular tube scissor diagonal stay 301 to the profile steel stand column 101;
the upright posts and the scissors stay connecting lug plates 4 are fixedly arranged on the profile steel upright posts 101;
in the embodiment of the invention, the supporting force of the jig frame is effectively improved by setting the triangular supporting structure, meanwhile, the technical defect that a large number of upright posts are needed in the traditional method is overcome, and the combined jig frame cross beam 2 is fixedly arranged at the upper part to realize large-area support, so that the technical effects of simple installation and strong supporting and bearing capacity are achieved.
As shown in fig. 2 to 3, in the embodiment of the present invention, the combined jig frame beam 2 includes:
the profile steel beam 201 with the transverse end insertion plate 203 is connected to the connecting wheel buckle 102, and the height-adjustable device is arranged above the profile steel beam 201.
As shown in fig. 3, in an embodiment of the present invention, the height-adjustable device includes:
the adjustable U support comprises an adjustable U support base 2202 fixedly arranged above a shaped steel beam 102, an adjustable U support column 2203 vertically fixedly connected above the adjustable U support base 2202, a column reinforcing plate 2204 used for reinforcing the adjustable U support column 2203, an adjustable U support cross beam 2205 arranged at the upper end part of the adjustable U support column 2203, a column connecting plate 2206 fixed below the adjustable U support cross beam 2205 and used for reinforcing the adjustable U support column 2203, an adjustable U support screw 2201 penetrating through the adjustable U support cross beam 2205 and respectively arranged below the column connecting plate 2206 and above the U support cross beam reinforcing plate 2209, a fixed U support screw nut 2208 used for achieving a spiral transmission connection effect, a screw and support connecting nut 2207 and a support U2211 arranged at the upper end of the adjustable U support screw 2201 and connected through a support U support connecting screw reinforcing plate 2210.
In the embodiment of the present invention, as shown in fig. 3, in the embodiment of the present invention, the supporting U-bracket connecting screw rod reinforcing plate 2210 uses a full-length welding process.
In the embodiment of the invention, the height-adjustable device is arranged above the combined upright post, so that the adaptability of the equipment is effectively improved, the technical problem that the whole upright post needs to be replaced temporarily when the supporting height is insufficient in the traditional method is solved, the high-efficiency, convenient and fast operability is realized, the continuous adjustment of the supporting height can be realized through screw rod transmission, and the adjusting range is more comprehensive.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.

Claims (10)

1. The high-precision manufacturing process of the special-shaped complex curved surface net piece is characterized by comprising the following steps of:
s100: utilizing a computer aided design technology to establish a three-dimensional model of the space structure of the net shell, carrying out simulated unloading stress analysis and deformation calculation on the hoisting net piece truss and the assembled net shell, continuously optimizing the net shell design, deepening the net shell rod piece and partition unit net piece construction drawing design, finally leading out the net shell steel beam size and the control point coordinates, and processing the net shell rod piece;
S200: designing a net shell processing jig frame, dividing a unit installation area, performing multi-wheel deep design to obtain a preferred scheme, determining a construction method and a process flow, and assembling an adjustable jig frame on the ground, wherein the adjustable jig frame has a height adjusting function;
s300: the method comprises the steps of organizing mechanical equipment tools, entering a field of constructors, preparing single-piece latticed shell welding construction, adjusting the height of an adjustable jig, welding steel structure rods under the supporting action of the adjustable jig according to a construction sequence to form a local latticed shell structure, adopting control measures on environmental conditions in the processing and welding processes, guaranteeing the processing and welding quality, and finally achieving the purposes of saving cost, guaranteeing quality, carrying out nondestructive detection on welding seams according to national standard standards and guaranteeing the standard;
s400: the installed local latticed shell structure is cooperatively hoisted by adopting a double-machine-table crane;
s500: measuring and controlling precision;
s600: welding and forming;
s700: and (5) installing a glass curtain wall.
2. The process for manufacturing a special-shaped complex curved surface mesh with high precision according to claim 1, wherein the step S300 further comprises:
s301: placing and positioning a first section of main rod on the jig frame, then arranging a baffle plate and welding and fixing the baffle plate and the main rod, so that the main rod is fixed on the jig frame;
S302: placing a main rod adjacent to the first section main rod on the jig frame, and fixing the main rod on the jig frame in the same way as the method;
s303: a supporting rod which is just connected between the two main rods is installed;
s304: a main rod axially abutted with the main rod of the first section is arranged on the tire frame, and the main rod is fixed on the tire frame
S305: installing adjacent main rods and installing the rigid-connection supporting rods among the main rods according to the sequence requirements
S306, repeating the process, installing the branch pipes which are communicated with the main pipe and the branch pipes after the hidden weld joint welding of the just-connected branch pipes is completed, and lifting the installed local latticed shell structure off the jig frame after all the welding is completed.
3. The process for manufacturing a special-shaped complex curved surface mesh with high precision according to claim 1, wherein the step S400 comprises:
s401: assembling and hoisting the unit meshes and the rod pieces: firstly, building a first part of supporting frame, then lifting a first unit mesh in a region, adjusting the length of a lifting appliance by adopting two crawler cranes according to a lifting rope control length meter, stopping lifting when the first unit mesh is separated from a processing jig frame by 30cm, standing for 8 minutes, observing a structure and the lifting appliance, and carrying out the next operation after the safety; secondly, posture adjustment and inclination adjustment: adjusting according to the state of the latticed shell in the design space, adjusting the length of the latticed shell by using a lifting rope, and monitoring the position coordinates and elevation of the latticed shell node by using a total station until the position reaches the design position and is welded and fixed with a support; after the first truss unit mesh is hung to a designated position, slowly descending to enable the unit mesh to be contacted with the first supporting position of the mounting support frame; after being in place, the rod piece at the support is welded with the support short column, and the central unit is welded in a bottoming way;
S402, installing a second truss unit mesh, wherein the method is the same as that of the first truss unit mesh; one end is welded with the support, the other end is butted with the first transverse end, and the space position coordinates and the elevation are adjusted to reach the design position; is connected through butt welding; filling end net shell rod pieces;
s403, installing a third truss unit mesh, wherein the method is the same as that described above; the method comprises the steps of adjusting in place to reach a design position, firstly firmly welding three rod pieces connected with a first truss unit net piece, ensuring safety and stability, and welding and assembling the residual connecting rod pieces of the first truss unit net piece and a third truss unit net piece; then installing a fourth truss unit net, adopting double-crane or single-crane installation according to the weight and the length dimension, and adopting 50-ton automobile cranes to carry out rod supplementing lifting in a matching way; when the net sheet is hung to load and unload the hook, a safe and stable structure is required to be formed with the support and the net sheet support, and after the connection point is welded and is inspected to be qualified, the hook unloading operation can be started; when the hook is detached, the hook slowly descends, a crane driver monitors the hanging weight, when the hanging weight is reduced to 50 percent of the hanging weight, the structure and the support are observed after the crane is stationary for 5 minutes, and then the crane driver slowly descends again; when the weight is reduced to 25 percent of the hanging weight, the structure and the supporting safety condition are observed after the system is still for 5 minutes; ensuring that the safety rear part can be completely unloaded and unhooked;
S404, unloading and dismantling the support frame: the first part of the supporting frame is installed, and meanwhile, the first part of the unit meshes and the rod pieces are assembled; when the second part of supporting frame, the unit net piece and the rod piece are installed to form a local net shell space structure, the first part of net shell supporting frame reduces the supporting point of the first part of supporting frame according to the construction flow, synchronously unloading, synchronously descending the adjustable hydraulic supporting device, simultaneously carrying out measurement and monitoring, comparing with the simulation calculation deformation horizontal displacement and the vertical deformation descending value and controlling the deformation horizontal displacement and the vertical deformation descending value within the allowable range; the third part of the bracket and the fourth part of the bracket are installed until the last bracket is installed; simultaneously, when a part of the support is installed, the unit meshes and the rod pieces are assembled to form a latticed shell structure; then unloading step by step according to the construction sequence and removing the support frame until all the support frames and the net shells in each area are installed, and removing the final support frame;
s405, unloading technical requirements: and (3) assembling and welding a plurality of local unit meshes and rod pieces into a latticed shell space structure: the unloading condition is that the installation completion part, the support and the tree column are completely welded; the unit meshes and all the rod pieces are connected, the welding is completed, the welding lines are inspected to be qualified, the elevation of the space node of the installed net shell part is monitored to reach the design requirement and standard allowable deviation, and whether the branch welding lines of the support and the tree-shaped steel column are cracked or not; the deformation of the installed part of the latticed shell is within the design requirement range, and meets the specification requirement;
S406, reserving an installation deviation and deformation adjustment control area, and when a large-span complex curved surface single-layer latticed shell space structure is installed, especially installing and constructing a multi-span space latticed shell structure, presetting the installation deviation and deformation control area, wherein the engineering is arranged in three areas; when the first-area unit reticulated shell and the second-area unit reticulated shell are installed, measuring and checking the actual space dimensions of the three-area net sheet, the rod piece and the tree column; when the installation deviation and deformation exceed the allowable range, the center design and adjustment are carried out on the three-area unit net shell and the rod piece; the net piece and the rod piece are processed and manufactured according to the adjustment design; installing according to the construction sequence and the flow of the construction scheme, wherein the installation method is the same as that described above;
s407: the large-span complex curved surface single-layer steel latticed shell space structure is processed, manufactured, installed and welded, and the welding quality is controlled by adopting reasonable welding directions and sequences; when the structure is symmetrical, a symmetrical welding method is adopted; when the weld is more and more concentrated; dispersing and heating by adopting a skip welding method to prevent concentrated heating; a long welding line larger than 1 meter adopts a segmented back welding method; firstly welding an expanded welding line, and then welding a welding line with small expansion; firstly welding a short seam, then welding a long seam, so that the welding seam has a large enough transverse contraction space, and in order to ensure that the welding seam with larger stress has a certain expansion space after welding, firstly welding a main welding seam with larger stress, then welding a secondary welding seam with smaller stress, and carrying out a reverse deformation method; in order to reduce welding deformation, a pre-deformation opposite to the welding deformation can be reserved before welding, and the pre-deformation is preheated; before welding, the whole or part of the welding piece is heated to 100-300 ℃, and the non-uniformity degree of the temperature change of the welding seam can be reduced by the method, so that the risk of crack generation caused by the temperature change is reduced, and the welding piece is tempered at a high temperature; a high-temperature tempering method is used for reducing welding deformation after welding; the high temperature tempering method is to heat the welding component to 600-650 ℃ and wait for slow cooling; if the welding member is smaller, the whole welding member can be tempered at high temperature, the temperature reached by heating reaches the thermoplastic temperature of the steel, the deformation degree of the steel is small, namely most of welding deformation is eliminated, if the welding member is larger, the whole welding member is inconvenient to temper at high temperature, only the part near the welding seam or the part with larger welding stress can be tempered at local high temperature, and the welding deformation can be reduced;
S408: the installation construction measurement monitoring control of the large-span complex curved surface single-layer steel latticed shell space structure is characterized in that the measurement condition is selected for proper time observation, so that the influence of temperature difference is prevented, the good state of a measuring instrument is ensured, the measuring instrument is operated according to the specification, and the total station observation is performed with temperature-to-air pressure correction; hanging the steel rule to transfer elevation, and correcting the steel rule according to an identification formula; at least 4 points are arranged at observation points of each group of hoisting units for control and monitoring; after a plurality of meshes are installed, checking the installation size, confirming the checking design requirement, feeding back the practical data of the re-measurement, comparing the practical data with the coordinates and the elevation of the design space position, carrying out welding flaw detection and paint repairing after the data comparison is confirmed to be correct, and carrying out unloading unit mesh support; after unloading is started, sequentially carrying out batch processing from north to south according to the actual condition of the construction, synchronously adjusting down a batch of adjustable hydraulic support frames according to retest data, immediately carrying out retest deflection change, carrying out retest on key node coordinates and elevations by using a total station, feeding back retest actual data, and carrying out checking calculation; the space nodes and the reticulated shell are monitored integrally; because the whole latticed shell adopts a single-layer curved surface steel structure square tube to form a space complex latticed shell structure, when in installation, the unit meshes and the bulk rod pieces are alternately assembled and installed according to a deepened design scheme, on the basis of strengthening the requirement of the processing progress, the mesh pieces are adopted for installation and checking, and the monitoring is changed and the adjustment is carried out, so that the installation error is eliminated as much as possible; the three-dimensional coordinates of each rod node of the roof reticulated shell are checked one by adopting a total station, so that each rod and each net are ensured to be installed and positioned within a standard allowable range; if the dimension of the super-sheet exceeds the allowable value, the super-sheet should be adjusted before the next procedure;
S409, mounting deformation control of a large-span complex curved surface single-layer steel reticulated shell space structure, adopting an assembly jig, checking the position, radian and angle conditions of the jig according to a construction drawing after the assembly jig is arranged, and assembling components after retesting; calculating various deformation amounts by software in advance, and adopting anti-deformation measures to ensure that the installation deformation deviation meets the standard requirement; advanced processing equipment is adopted, so that the blanking precision is ensured; the group positioning adopts a total station to accurately position the coordinates of each node of the truss; after the assembly on the jig frame is completed, all the constraints on the truss are released, so that the truss is in a free state, and all the sizes of the hoisting units are measured in the free state, so that the assembly net sheets and the net shell are ensured to be installed to meet the design requirements.
4. A process for manufacturing a profiled complex curved surface mesh sheet according to any one of claims 1 to 3 with high precision, said step S500 further comprising:
s501, before hoisting a local reticulated shell structure unit, using a computer to model, determining measurement control points of each group of hoisting units, calculating corresponding triaxial coordinates of observation points, attaching a special reflection sheet for a total station at the corresponding positions of the hoisting units, observing the reflection sheet on each control point by using the total station, automatically calculating a spatial three-dimensional coordinate point by using a total station polar coordinate method, comparing the spatial three-dimensional coordinate point with a theoretical value, and achieving the purpose of controlling installation precision, wherein each group of hoisting units is provided with at least 4 measurement control points, two ends of each hoisting unit are respectively provided with one control point, and a control point is arranged near each support point;
S502, lifting the lifting unit if deviation exists, pulling the net shell by using a chain block to carry out fine adjustment, and repairing the intersecting opening of the supporting steel pipe by using gas cutting so as to ensure the installation precision of the lifting unit;
s503, after the three-dimensional coordinates of the hoisting unit meet the requirements, welding the supporting steel pipe with the main chord pipe of the hoisting unit, wherein the supporting steel pipe is fully welded on the steel plate at the top of the support frame, and the size of a welding leg is not smaller than the wall thickness of the supporting steel pipe; full welding is required for the supporting steel pipe and the main chord pipe of the hoisting unit, and the size of a welding leg is equal to the wall thickness of the supporting steel pipe;
s504, the reflective sheets on each control point are used for settlement observation, monitoring is started after the installation of the roof reticulated shell, and monitoring is carried out once every week in the installation stage of the reticulated shell after the installation of the decorative surface layers such as the roof aluminum plate, the glass and the like are completed, and monitoring is carried out once every two days in the decoration construction stage of the roof in the unloading process;
and S505, measuring coordinates of the reflecting sheet attached to the center of the lower surface of the main rod node by using a total station to perform settlement observation so as to form a settlement observation curve.
5. The process for manufacturing a special-shaped complex curved surface mesh with high precision according to claim 4, wherein the step S600 comprises the following steps:
s601, adjusting the position of a component by using a chain block, aligning a hoisting unit with an interface, keeping a gap of 5-8 mm, slowly falling a hook to enable the component to be slowly and lightly placed on a support short column and a concrete column top support, enabling a crane to bear 90% of the weight of the component at the moment, starting correction, raising a crank arm vehicle at the interface position at the moment, and preparing for welding by an electric welder;
S602, after correction is completed, the crane slowly drops the hook again, and after the crane bears 40% of the weight of the component, the hook is stopped to start welding;
s603, after welding of the concrete column top support and the ring beam support short column, firstly unhooking a crane close to one side of the concrete column, installing branch pipes, and installing at least 3 branch pipes on one group of hoisting units, so that a stable space structure system is formed by the installed hoisting units and the installed structure;
s604, when the welding of the butt joint main pipe of the butt joint is completed, after the installation of the 3 branch pipes is completed, the crane at the middle part removes the lifting hook, and the installation of the intersecting branch pipes at the butt joint position is completed;
s605, when a part of unit net sheets and rod pieces are installed to form a local net shell, the position coordinates and the elevation of the space nodes are measured and controlled, and the installation construction effect is ensured;
s606, reserving a mounting deviation and a stress deformation reserved area in construction, guaranteeing machining and mounting precision of the net shell structure mounting rod piece, guaranteeing elimination of the machining and mounting deviation, and achieving the effect of designing building modeling.
6. The process for manufacturing a special-shaped complex curved surface mesh with high precision according to claim 5, wherein the step S700 comprises:
s701, firstly, an operator who transports the plate moves the plate to a designated hoisting position by using a forklift, and the plate is accurately placed in position and orientation, so that the electric glass sucker hook is convenient to reliably connect with a fixed wind rope;
S702, when the plate is about to travel to a designated installation position, informing a worker to control stopping rising and turning off a control switch of the crane, and then adjusting the specific position of the plate by using an auxiliary installation tool;
s703, after the plate elevation is in place, firmly connecting the aluminum alloy frame with the keel upright post by using an angle brace, then gradually adjusting until the position of the design requirement is reached, screwing up a connecting bolt to prevent the plate from loosening, and then putting down a hoisting steel rope;
s704, adjusting: after the glass plate is initially assembled, the horizontal beam of the plate is adjusted, and the glass seam is horizontal; vertical beams are vertical, and glass seams are glued and sealed vertically; after the outdoor adjustment, the glass is checked to see whether the flat place is flat or not and whether the size of each place meets the design requirement or not;
s705, fixing: the glass plate is fixed immediately after adjustment, mainly by an aluminum pressing strip; the holes are drilled when the layering is arranged, the distance is not more than 250mm, and the layering is arranged in a positive pressure way, so that loosening or water-proof adhesive tape falling off is avoided;
s706, checking and accepting: when glass is installed each time, from the installation process to the installation completion, the whole process is subjected to quality control, acceptance is inserted in the whole process, and the acceptance content is as follows: whether the plate has problems or not; whether the size of the glue line of the exposed frame glass curtain wall meets the design requirement or not; the acceptance record and the fixation of the aluminum press block belong to the range of the hidden engineering, and various data are required to be made according to the relevant regulations of the hidden engineering.
7. The utility model provides a device for use of dysmorphism complex curved surface net piece high accuracy manufacturing process which characterized in that includes:
the combined upright post ((1)) is used for playing a main supporting role and comprises a section steel upright post (101), an upright post base (103), a connecting wheel buckle (102) fixedly connected to the surface of the section steel upright post (101) at a certain height and an upright post and scissor support connecting lug (104);
a combined jig frame cross beam (2) for connection, fixation and support;
the combined jig frame scissor stay (3) comprises two circular tube scissor diagonal stay rods (301) connected through a diagonal stay rod hinge shaft connecting shaft (302), and a scissor stay and stand lug plate connecting pin (303) for fixedly connecting the end parts of the circular tube scissor diagonal stay rods (301) to the profile steel stand column (101);
the upright post and the scissors support which are fixedly arranged on the profile steel upright post (101) are connected with the lug plate (4).
8. The device for using the special-shaped complex curved surface net piece high-precision manufacturing process is characterized in that the combined jig frame cross beam (2) comprises:
the steel-shaped beam (201) is connected to the connecting wheel buckle (102) and provided with a transverse end insertion plate (203), and the height-adjustable device is arranged above the steel-shaped beam (201).
9. The utility model provides a device for use of dysmorphism complex curved surface net piece high accuracy manufacturing process which characterized in that, highly adjustable device include:
The support device comprises an adjustable U support base (2202) fixedly arranged above a section steel beam (201), an adjustable U support column (2203) vertically fixedly connected above the adjustable U support base (2202), a column reinforcing plate (2204) used for playing a reinforcing role on the adjustable U support column (2203), an adjustable U support beam (2205) arranged at the upper end part of the adjustable U support column (2203), a column connecting plate (2206) fixedly arranged below the adjustable U support beam (2205) and used for playing a reinforcing role on the adjustable U support column (2203), an adjustable U support screw (2201) penetrating through the adjustable U support screw rod (2201) and connected to the adjustable U support beam (2205) in a threaded manner, a fixed U support screw rod nut (2208) which is arranged below the column connecting plate (2206) and above the U support beam reinforcing plate (2209) and used for playing a spiral transmission connection role, a screw rod and support connecting nut (2207), and a support U support plate (2211) which is arranged at the upper end of the adjustable U support screw rod (2201) and connected to the support U support plate (2210).
10. The device for the high-precision manufacturing process of the special-shaped complex curved surface net piece is characterized in that the supporting U-shaped support connecting screw rod reinforcing plate (2210) adopts a full-length welding process.
CN202211434590.XA 2022-11-16 2022-11-16 High-precision manufacturing process and device for special-shaped complex curved surface mesh Pending CN116241056A (en)

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CN202211434590.XA CN116241056A (en) 2022-11-16 2022-11-16 High-precision manufacturing process and device for special-shaped complex curved surface mesh

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