CN113059291A - Manufacturing method of Y-shaped conversion column structure - Google Patents
Manufacturing method of Y-shaped conversion column structure Download PDFInfo
- Publication number
- CN113059291A CN113059291A CN202110228306.2A CN202110228306A CN113059291A CN 113059291 A CN113059291 A CN 113059291A CN 202110228306 A CN202110228306 A CN 202110228306A CN 113059291 A CN113059291 A CN 113059291A
- Authority
- CN
- China
- Prior art keywords
- plate
- welding
- plates
- column structure
- fabricating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 238000003466 welding Methods 0.000 claims abstract description 62
- 238000000034 method Methods 0.000 claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 230000000875 corresponding Effects 0.000 claims description 4
- 230000002441 reversible Effects 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 230000035515 penetration Effects 0.000 claims description 2
- 230000001360 synchronised Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
Abstract
The invention provides a manufacturing method of a Y-shaped conversion column structure, which is characterized in that geometric shape control is carried out through CAD according to the space position of each part of the Y-shaped conversion column structure, and a matched horizontal jig frame is established by utilizing multi-point coordinate values so as to meet the assembly requirements of a special-shaped inner flange and a gusset plate and ensure the accuracy of the part in the space position of a component. The end plate reduces welding shrinkage by a welding anti-deformation control method, and the requirement of the end plate on flatness is ensured. Meanwhile, each assembling and welding procedure is covered by three-dimensional precision control work combined by a total station and IN-ANALY precision analysis software, and deviation parts are adjusted and corrected IN time to ensure the assembling and welding precision of the component. The invention also effectively ensures the space position and size requirements of each part of the Y-shaped conversion column with smaller included angle through the reasonable process requirements of synchronous assembly, welding sequence control and the like. In addition, the invention reduces the difficulty and work of welding, thereby effectively improving the working efficiency and having good economic and social benefits.
Description
Technical Field
The invention relates to the technical field of manufacturing of complex column structures, in particular to a manufacturing method of a Y-shaped conversion column structure.
Background
In recent years, with the continuous development of the building industry in China, the multifunctional and comprehensive application requirements are provided for the functional requirements of high-rise buildings, particularly for comprehensive buildings, the traditional large column net cannot meet the requirements of effective space utilization and cost at the same time, the problem of engineering design is well solved due to the appearance of a conversion layer structure, and good economic benefits are obtained. The V-shaped column type conversion structure is used as a novel conversion form of a conversion layer structure and is mainly used for a frame-earthquake-resistant wall system and a frame-cylinder system, but the Y-shaped conversion column derived on the basis of the V-shaped column is characterized by possibly comprising the combined application of a plurality of systems such as a cross column system, a field-shaped cylinder system or a V column system, and the like, but increases the manufacturing and welding difficulty for the processing and manufacturing requirements, especially the Y-shaped conversion column with a smaller included angle. Therefore, in order to solve the above problems, a new technical solution is provided to meet the requirement.
Disclosure of Invention
In order to solve the above-mentioned drawbacks, the present invention provides a method for fabricating a Y-type switching pillar structure.
In order to achieve the purpose, the invention adopts the following technical scheme: a manufacturing method of a Y-shaped conversion column structure comprises the following steps:
step 1: firstly, carrying out body blanking by using a numerical control cutting machine; when the groove is cut, the groove is cut according to the requirements of a drawing, and the two sides are cut simultaneously to reduce deformation and correct flatness;
step 2: setting a horizontal jig frame, and assembling and welding end plates and node plates on the horizontal jig frame through temporary process stiffening plates;
and step 3: assembling the inner flange plates on two sides of the Chinese character tian with the gusset plate through the auxiliary process plate;
and 4, step 4: on the horizontal jig frame, assembling inner webs on two sides of the square structure between the node plate and the inner flange plate through the auxiliary process plate;
and 5: assembling and welding the central web plate, the outer web plate, the small web plate and the outer flange plate step by step, and adding a stiffening plate and an auxiliary supporting plate;
step 6: and assembling and welding the cross column on the other side of the end part.
Furthermore, the end plate in the step 2 is subjected to welding reversible deformation operation, so that plane inward bending caused by welding shrinkage between the end plate and the field-shaped structure is avoided.
Further, in the step 2, geometric analysis is performed on the inner flange plate and the gusset plate through a CAD special module, corresponding coordinate points are established, and a matched horizontal jig frame is established by utilizing multi-point coordinate values. This is because the inner flange plate forms an angle with the gusset plate.
Further, in the step 3, the inner flange plate and the gusset plate are analyzed by the CAD to obtain relative coordinate positions, which are used as a basis for assembling parts. This is because the inner flange plate is a special-shaped plate, and has a sharp corner portion, and the relative position is difficult to determine.
Furthermore, the welding grooves between the inner flange plates and the gusset plates in the step 3 and between the inner web plates and the gusset plates and the inner flange plates in the step 4 adopt a welding mode of bottoming an outer side fillet weld, performing inner side back chipping and filling a cover surface by utilizing natural grooves formed between steel plates.
Furthermore, in the step 4, a notch similar to a cavity is formed at the intersection of the inner web plate, the gusset plate and the inner flange plate, and a manufacturing process of firstly carbon planing on the inner side and then welding is adopted to ensure the requirement of full penetration of the body.
Further, the inner web plate in the step 4 is provided with a bevel edge, and a small amount of sharp corners of the inner web plate are required to be removed so as to eliminate welding stress concentration.
Furthermore, in the step 5, the outer flange plate and the outer web plate are fixedly supported through the auxiliary supporting plate, so that the reduction of the section size caused by welding shrinkage is avoided.
Furthermore, in the step 5, corresponding anti-lamellar tearing grooves are required to be formed between the outer flange plate and the outer web plate, between the outer web plate and the end plate, between the inner web plate and between the outer flange plate and the end plate, and between the inner web plate and the end plate.
Further, IN the step 3, the step 4, the step 5 and the step 6, the total station and IN-ANALY precision analysis software are used for carrying out three-dimensional precision control on the structure before and after each welding step, so that the assembly and welding precision of the component is ensured, and the deviation part is adjusted and corrected IN time.
The invention has the beneficial effects that: according to the space positions of all parts of the Y-shaped conversion column structure, the geometric shape is controlled through the CAD special module, and the matched horizontal jig frame is established by utilizing the coordinate values of multiple points, so that the assembly requirements of the special-shaped inner flange and the gusset plate are met, and the accuracy of parts in the space positions of components is also ensured. The end plate reduces welding shrinkage by a welding anti-deformation control method, and the requirement of the end plate on flatness is ensured. Meanwhile, each assembling and welding procedure is covered by three-dimensional precision control work combined by a total station and IN-ANALY precision analysis software, and deviation parts are adjusted and corrected IN time to ensure the assembling and welding precision of the component. The invention also effectively ensures the space position and size requirements of each part of the Y-shaped conversion column with smaller included angle through the reasonable process requirements of synchronous assembly, welding sequence control and the like. In addition, the invention reduces the difficulty and work of welding, thereby effectively improving the working efficiency and having good economic and social benefits.
Drawings
FIG. 1 is a schematic structural diagram of a Y-type switching column structure according to the present invention.
FIG. 2 is a left side view of the Y-type switching column structure of the present invention.
FIG. 3 is a schematic top view of a Y-type switching pillar structure according to the present invention.
FIG. 4 is a schematic view of an auxiliary supporting plate of the Y-shaped conversion column structure of the present invention
Wherein: 1. the structure comprises end plates, 2, gusset plates, 3, inner flange plates, 4, inner webs, 5, middle webs, 6, outer webs, 7, small webs, 8, outer flange plates, 9, stiffening plates, 10, auxiliary process plates, 11, horizontal jig frames, 12, cross columns, 13 and auxiliary supporting plates.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The Y-shaped conversion column structure body comprises a V-shaped field column, a middle node plate 2 and an end plate 1. The cross column 12 and the V-shaped column are assembled and welded together through the end plate 1, the end part needs to be welded for many times, and welding deformation is easy to generate. The V-shaped square column is formed by assembling and welding two square structures through the middle gusset plate 2, wherein a space included angle formed by the two square structures is smaller. In addition, the wing web of field word structure is mostly special-shaped board, and has the assembly positioning difficulty, cross-sectional dimension control is difficult. This puts higher manufacturing and welding requirements on the processing and manufacturing requirements of the whole structure.
As shown in fig. 1-4, a method for fabricating a Y-type switching pillar structure includes the following steps:
step 1: firstly, a numerical control cutting machine is used for blanking the body. When the groove is cut, the groove is cut according to the requirements of a drawing, and the two sides are cut simultaneously to reduce deformation and correct flatness.
Step 2: and performing geometric shape control on the inner flange plate 3 and the gusset plate 2 through CAD, and establishing a matched horizontal jig frame 11 by using multi-point coordinate values. And assembling and welding the end plates 1 and the node plates 2 on the horizontal jig frame 11 through temporary process stiffening plates. Meanwhile, the end plate 1 is subjected to welding reversible deformation operation, and plane inward bending caused by welding shrinkage between the end plate and the square column body is avoided.
And step 3: and performing geometric shape control on the inner flange plate 3 and the gusset plate 2 through a CAD special module to obtain the relative coordinate positions of the inner flange plate 3 and the gusset plate 2 as the basis of part assembly. On the horizontal jig frame 11, the flange plates 3 on the two sides of the square structure and the gusset plate 2 are assembled through the auxiliary process plate 10. And a natural groove formed between the steel plates is utilized between the inner flange plate 3 and the gusset plate 2, and the welding modes of bottoming an outer side fillet weld, back chipping an inner side and filling a cover face are adopted. And the spatial positions before and after welding of the inner flange plate 3 and the gusset plate 2 are subjected to deviation analysis before and after welding and timely correction by using a total station and IN-ANALY precision analysis software.
And 4, step 4: on the horizontal jig 11, the two-sided inner webs 4 are fitted between the gusset plate 2 and the inner flange plate 3 by the auxiliary process plates 10. And the welding grooves among the inner web 4, the gusset plate 2 and the inner flange plate 3 adopt a welding mode of bottoming an outer side fillet weld, carrying out inner side back chipping and then filling a cover face by utilizing a natural groove formed among steel plates. In addition, the intersection of inner web 4 and gusset plate 2, inner flange plate 3 has formed the breach of similar cavity, adopts the inboard manufacturing process who digs carbon earlier and weld again to make processing to guarantee the body and fully fuse the requirement. The web has beveled edges and sharp corners on the beveled edges of the inner web 4 strip are removed to eliminate weld stress concentrations. And (3) analyzing the deviation of the spatial position of the inner web plate 4 before and after welding by using a total station and IN-ANALY precision analysis software and correcting IN time.
And 5: the outer flange plate 8 and the outer web plate 6 are fixed and assembled through the stiffening plate 9, and the middle web plate 5 is fixed and assembled through the auxiliary supporting plate 13, so that the reduction of the section size caused by welding shrinkage is avoided. And after the middle web 5 is welded, assembling and welding the small web 7, and finally completing the welding operation of the longitudinal main welding line of the body. Wherein, corresponding anti-lamellar tearing grooves are required to be arranged between the outer flange plate 8 and the outer web plate 6, between the middle web plate 5, between the inner web plate 4 and between the end plates 1. Meanwhile, the spatial positions of the central web 5, the outer web 6, the lower web 7 and the outer flange plate 8 are subjected to deviation analysis before and after welding and timely corrected by using a total station and IN-ANALY precision analysis software.
Step 6: assembling and welding the cross column 12 on the other side of the end part, and performing deviation analysis before and after welding and timely correction on the structure of the cross column 12 by using a total station and IN-ANALY precision analysis software.
According to the space positions of all parts of the Y-shaped conversion column structure, geometric shape control is carried out through CAD, and the matched horizontal jig 11 is established by utilizing multi-point coordinate values, so that the assembly requirements of the special-shaped inner flange and the gusset plate 2 are met, and the accuracy of parts in the space positions of components is also ensured. The end plate 1 reduces welding shrinkage by a welding reversible deformation control method, and the flatness requirement of the end plate 1 is ensured. Meanwhile, each assembling and welding procedure is covered by three-dimensional precision control work combined by a total station and IN-ANALY precision analysis software, and deviation parts are adjusted and corrected IN time to ensure the assembling and welding precision of the component. The invention also effectively ensures the space position and size requirements of each part of the Y-shaped conversion column with smaller included angle through the reasonable process requirements of synchronous assembly, welding sequence control and the like. In addition, the invention reduces the difficulty and work of welding, thereby effectively improving the working efficiency and having good economic and social benefits.
Claims (10)
1. A manufacturing method of a Y-shaped conversion column structure is characterized by comprising the following steps:
step 1: firstly, carrying out body blanking by using a numerical control cutting machine; when the groove is cut, the groove is cut according to the requirements of a drawing, and the two sides are cut simultaneously to reduce deformation and correct flatness;
step 2: setting a horizontal jig frame, and assembling and welding end plates and node plates on the horizontal jig frame through temporary process stiffening plates;
and step 3: assembling the inner flange plates on two sides of the Chinese character tian with the gusset plate through the auxiliary process plate;
and 4, step 4: on the horizontal jig frame, assembling inner webs on two sides of the square structure between the node plate and the inner flange plate through the auxiliary process plate;
and 5: assembling and welding the central web plate, the outer web plate, the small web plate and the outer flange plate step by step, and adding a stiffening plate and an auxiliary supporting plate;
step 6: and assembling and welding the cross column on the other side of the end part.
2. The method for fabricating a Y-type switching column structure of claim 1, wherein: and (3) performing welding reversible deformation operation on the end plate in the step (2) to avoid plane inward bending caused by welding shrinkage between the end plate and the field-shaped structure.
3. The method for fabricating a Y-type switching column structure of claim 1, wherein: and 2, performing geometric shape control on the inner flange plate and the node plate through the CAD, and establishing a matched horizontal jig frame by using multi-point coordinate values.
4. The method for fabricating a Y-type switching column structure of claim 1, wherein: and in the step 3, the inner flange plate and the gusset plate are analyzed through CAD to obtain relative coordinate positions which are used as the basis of part assembly.
5. The method for fabricating a Y-type switching column structure of claim 1, wherein: and 3, welding grooves between the inner flange plates and the gusset plates in the step 3 and between the inner web plates and the gusset plates and between the inner flange plates in the step 4 are welded by adopting a welding mode of bottoming an outer side fillet weld, back chipping an inner side and filling a cover face by utilizing natural grooves formed between steel plates.
6. The method for fabricating a Y-type switching column structure of claim 1, wherein: and 4, forming a gap similar to a cavity at the intersection of the inner web plate, the gusset plate and the inner flange plate in the step 4, and adopting a manufacturing process of firstly carbon planing on the inner side and then welding to ensure the full penetration requirement of the body.
7. The method for fabricating a Y-type switching column structure of claim 1, wherein: and 4, removing sharp corners on the bevel edge of the inner web plate to eliminate welding stress concentration.
8. The method for fabricating a Y-type switching column structure of claim 1, wherein: and in the step 5, the outer flange plate and the outer web plate are fixedly supported through the auxiliary supporting plate, so that the reduction of the section size caused by welding shrinkage is avoided.
9. The method for fabricating a Y-type switching column structure of claim 1, wherein: and in the step 5, corresponding anti-lamellar tearing grooves are required to be arranged between the outer flange plate and the outer web plate, between the outer web plate and the inner web plate, and between the outer flange plate and the inner web plate and between the outer flange plate and the end plates.
10. The method for fabricating a Y-type switching column structure of claim 1, wherein: and 3, performing three-dimensional precision control on the structure before and after each welding step by using a total station and IN-ANALY precision analysis software IN the steps 3, 4, 5 and 6 so as to ensure the assembly and welding precision of the component and adjust and correct the deviation part IN time.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202110228306.2A CN113059291B (en) | 2021-03-02 | 2021-03-02 | Manufacturing method of Y-shaped conversion column structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202110228306.2A CN113059291B (en) | 2021-03-02 | 2021-03-02 | Manufacturing method of Y-shaped conversion column structure |
Publications (2)
Publication Number | Publication Date |
---|---|
CN113059291A true CN113059291A (en) | 2021-07-02 |
CN113059291B CN113059291B (en) | 2022-10-21 |
Family
ID=76559505
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202110228306.2A Active CN113059291B (en) | 2021-03-02 | 2021-03-02 | Manufacturing method of Y-shaped conversion column structure |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN113059291B (en) |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000144899A (en) * | 1998-11-13 | 2000-05-26 | Nkk Corp | Welded structure and its manufacture |
JP2000186368A (en) * | 1998-12-22 | 2000-07-04 | Hitachi Metals Ltd | Structure for connection of column member with beam member |
CN104264789A (en) * | 2014-05-23 | 2015-01-07 | 浙江东南网架股份有限公司 | Novel connecting node of cross grid structure, special molding bed and preparation method thereof |
CN104368916A (en) * | 2014-10-16 | 2015-02-25 | 中建钢构有限公司 | Method for manufacturing steel plate shear wall and temporary supporting structure for steel plate shear wall |
CN104775564A (en) * | 2015-04-21 | 2015-07-15 | 江苏沪宁钢机股份有限公司 | Unsupported installation method for bidirectional tilting great-section box latticed columns |
CN108723630A (en) * | 2018-06-28 | 2018-11-02 | 二十二冶集团装备制造有限公司 | The production method of helically twisted box |
CN208472955U (en) * | 2018-07-19 | 2019-02-05 | 湖北鸿路钢结构有限公司 | A kind of Y type cross column steel structure node |
CN111119336A (en) * | 2020-01-19 | 2020-05-08 | 浙江省建筑设计研究院 | Y-shaped vertical face intersection conversion node formed by welding box-type steel pipes and application |
CN212248894U (en) * | 2020-01-07 | 2020-12-29 | 中南建筑设计院股份有限公司 | Structural column for umbrella-shaped building modeling |
-
2021
- 2021-03-02 CN CN202110228306.2A patent/CN113059291B/en active Active
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000144899A (en) * | 1998-11-13 | 2000-05-26 | Nkk Corp | Welded structure and its manufacture |
JP2000186368A (en) * | 1998-12-22 | 2000-07-04 | Hitachi Metals Ltd | Structure for connection of column member with beam member |
CN104264789A (en) * | 2014-05-23 | 2015-01-07 | 浙江东南网架股份有限公司 | Novel connecting node of cross grid structure, special molding bed and preparation method thereof |
CN104368916A (en) * | 2014-10-16 | 2015-02-25 | 中建钢构有限公司 | Method for manufacturing steel plate shear wall and temporary supporting structure for steel plate shear wall |
CN104775564A (en) * | 2015-04-21 | 2015-07-15 | 江苏沪宁钢机股份有限公司 | Unsupported installation method for bidirectional tilting great-section box latticed columns |
CN108723630A (en) * | 2018-06-28 | 2018-11-02 | 二十二冶集团装备制造有限公司 | The production method of helically twisted box |
CN208472955U (en) * | 2018-07-19 | 2019-02-05 | 湖北鸿路钢结构有限公司 | A kind of Y type cross column steel structure node |
CN212248894U (en) * | 2020-01-07 | 2020-12-29 | 中南建筑设计院股份有限公司 | Structural column for umbrella-shaped building modeling |
CN111119336A (en) * | 2020-01-19 | 2020-05-08 | 浙江省建筑设计研究院 | Y-shaped vertical face intersection conversion node formed by welding box-type steel pipes and application |
Also Published As
Publication number | Publication date |
---|---|
CN113059291B (en) | 2022-10-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN100526560C (en) | Method of controlling curve profile of bridge steel column | |
CN202117225U (en) | Crossed steel column | |
CN104923894A (en) | Full penetration fillet weld back-chipping-free welding process for large-scale H-shaped steel | |
CN107299679B (en) | A kind of more high-rise assembled modularization Self-resetting steel construction special-shaped column frame systems | |
CN104805961B (en) | Oblique bracket girders layer steel column of slab abnormity and preparation method thereof | |
CN106193620B (en) | A kind of processing method of steel plate shear force wall column | |
CN104482892B (en) | Spatial special casts the datum tool method of nacelle | |
CN103934693B (en) | The processing technology of box-structure post/beam shaping | |
CN111287067A (en) | Manufacturing method for curved part of steel box arch unit | |
CN104912258A (en) | Making method of isosceles trapezoid variable cross section bending member | |
CN113059291B (en) | Manufacturing method of Y-shaped conversion column structure | |
CN104196165A (en) | Ultra-large type multiple-cavity steel structure giant post and manufacturing method thereof | |
CN102837708A (en) | Manufacturing method of side wall of vehicle body of metro vehicle | |
CN211162483U (en) | Rectangular frame combined welding structure with large length-width ratio | |
CN111218981B (en) | Bending and twisting grid and manufacturing method thereof | |
CN205147402U (en) | H shaped steel butt joint node drilling template | |
CN211162484U (en) | Step-by-step combined welding structure of rectangular frame with large length-width ratio | |
CN204475515U (en) | A kind of special-shaped distortion steel structure member | |
CN110757018A (en) | Rectangular frame combined welding structure with large length-width ratio and welding method thereof | |
CN107023118B (en) | Cross-shaped steel column for truss layer and machining process of cross-shaped steel column | |
CN115749307B (en) | BIM-based installation control method for imitated Chinese diamond grid heart curtain wall | |
CN216226220U (en) | Auxiliary tool for correcting welding deformation of butt seams of plates | |
CN217379515U (en) | Many sloping roofs of modularization assembled steel construction roof truss | |
CN111910809B (en) | Digital production and processing method of decorative panel with complex special-shaped curtain wall structure | |
CN215145914U (en) | Splicing flange |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant |