CN113441810A - Cutting device and method for curved surface of connecting steel pipe - Google Patents
Cutting device and method for curved surface of connecting steel pipe Download PDFInfo
- Publication number
- CN113441810A CN113441810A CN202110612696.3A CN202110612696A CN113441810A CN 113441810 A CN113441810 A CN 113441810A CN 202110612696 A CN202110612696 A CN 202110612696A CN 113441810 A CN113441810 A CN 113441810A
- Authority
- CN
- China
- Prior art keywords
- steel pipe
- cutting
- curved surface
- connecting steel
- dimensional
- 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.)
- Withdrawn
Links
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
- B23K7/00—Cutting, scarfing, or desurfacing by applying flames
- B23K7/005—Machines, apparatus, or equipment specially adapted for cutting curved workpieces, e.g. tubes
- B23K7/006—Machines, apparatus, or equipment specially adapted for cutting curved workpieces, e.g. tubes for tubes
-
- 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
- B23K7/00—Cutting, scarfing, or desurfacing by applying flames
- B23K7/008—Preliminary treatment
-
- 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
- B23K7/00—Cutting, scarfing, or desurfacing by applying flames
- B23K7/10—Auxiliary devices, e.g. for guiding or supporting the torch
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
A cutting device and its method to connect curved surface of steel pipe, including connecting the steel pipe, coat the planar figure sticker outside connecting the steel pipe, lay the cutting line on connecting the steel pipe along the curved line of the planar figure sticker, the cutting torch moves on connecting the steel pipe along the cutting line, through modeling in kind, three-dimensional curved surface map is changed into the two-dimentional planar map, make the planar figure sticker, cut the steel pipe, polish and cut the steel pipe and connect steps such as the steel pipe to realize the cutting of the curved surface of connecting the steel pipe, the invention calculates the curved surface parameter of the steel pipe lap joint accurately according to the three-dimensional model, can direct the cutting work of connecting the steel pipe on the spot, has avoided cutting the curved surface and not conforming to the problem of the actual demand effectively, has guaranteed the controllability of the construction quality; this cutting operation is simple, and field operation personnel only need carry out cutting work according to the line of cut, have improved work efficiency.
Description
Technical Field
The invention relates to the field of civil engineering construction, in particular to a cutting device and a method for a curved surface of a connecting steel pipe.
Background
In the civil engineering field of bridges or temporary trestles on water, when the support is used for construction on mountainous areas or water with dangerous terrain, the erected steel pipe support is widely used as a support of an upper structure, and the support has the characteristics of high construction speed, strong terrain applicability, high bearing capacity and the like.
But also has higher requirement to the stability that the support was set up in the work progress, and a plurality of vertical bearing steel pipes need utilize horizontal or oblique steel pipe to link into an organic whole with it, strengthen whole support's stability, antidumping ability. The lapped interface of the connecting steel pipe and the vertical bearing steel pipe forms a complex curved surface due to factors such as the erection angle, the diameter of the steel pipe and the like. In the cutting process of the cross-connecting curved surface, correct parameters of the curved surface are difficult to determine or simulate by constructors, so that a large gap is formed when the connecting steel pipe and the bearing steel pipe are lapped, and lapping quality and construction efficiency are affected.
In view of the above, it is desirable to design a cutting apparatus and a method thereof capable of improving the cutting accuracy and efficiency of the curved surface of the steel pipe.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a cutting device and a method thereof, which can improve the cutting precision and the cutting efficiency of the curved surface of the connecting steel pipe.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows: the utility model provides a cutting device of connection steel pipe curved surface, includes the connection steel pipe, the plane figure sticker of cladding outside the connection steel pipe, lays the line of cut along plane figure sticker curve on the connection steel pipe, and the cutting torch moves on the connection steel pipe along the line of cut.
As a preferable scheme of the invention, channel steel is arranged below the connecting steel pipe.
The invention relates to a preferable scheme, which comprises a main steel pipe, wherein the side surface of the main steel pipe is connected with a connecting steel pipe which is obliquely arranged.
A cutting method for a curved surface of a connecting steel pipe comprises the following steps:
step one, real object modeling: drawing a real object three-dimensional graph according to parameters such as the diameters, the lap joint angles, the lap joint positions and the like of the main steel pipe and the connecting steel pipes in a design drawing;
step two, converting the three-dimensional surface graph into a two-dimensional plane graph: extracting three-dimensional curved surfaces intersected by the main steel pipe and the connecting steel pipe, differentiating the extracted three-dimensional curved surfaces into a plurality of equally divided points, calculating the length of each equally divided point and a standard section, taking the standard section as an abscissa and calculating the length as an ordinate, sequentially drawing all the lengths into a plane coordinate axis, connecting end points by using simulation curves, finally obtaining a two-dimensional plane graph of the intersected three-dimensional curved surfaces, and then marking the length of the abscissa and the height of the ordinate in the graph;
step three, manufacturing a plane graphic sticker: printing the two-dimensional plane graph according to the actual marking size, and checking whether the marking data on the sticker is matched with the actual measurement data; cutting the shadow part along the curve after the data correspond, and finishing the manufacturing of the plane graphic paster;
step four, cutting the steel pipe: the cut paster is wrapped on the connecting steel pipe to be cut, a cutting line is carved along the paster curve by using a stone pen, the carved cutting line is used as a reference during cutting, the cutting nozzle is uniformly pushed to move, and the connecting steel pipe is rotated at any time to enable a cutting point to be upward until the cutting is finished.
As a preferable scheme of the invention, the method comprises the following steps:
step five, padding channel steel under the steel pipe: and when three quarters of the connecting steel pipe is cut, the channel steel is cushioned below the part to be cut.
As a preferable scheme of the invention, the method comprises the following steps:
step six, polishing and cutting the steel pipe: and grinding the cutting part of the connecting steel pipe.
As a preferable scheme of the invention, the method comprises the following steps:
step seven, connecting the steel pipes: and welding the cutting part of the connecting steel pipe with the designated position of the main steel pipe.
In a preferred embodiment of the present invention, the standard cross-section in the second step has a size corresponding to a circumference of the connecting steel pipe.
As a preferable scheme of the present invention, the ratio of the size of the planar graphic sticker in step three to the actual marked size is 1: 1.
In a preferred embodiment of the present invention, the number of the bisectors into which the three-dimensional curved surface is subdivided in the second step is 50.
The invention has the beneficial effects that: according to the method, the curved surface parameters of the steel pipe lap joint are accurately calculated according to the three-dimensional model, the cutting work of the steel pipe connected on site can be directly guided, the problem that the cut curved surface does not meet the actual requirement is effectively avoided, and the controllability of the construction quality is ensured; the cutting operation is simple, field operators only need to perform cutting work according to cutting lines, and constructors can quickly master the cutting work, so that the working efficiency is improved; thereby the curved surface of effectual avoiding cutting out because of the steel pipe cutting out is not laminated with main steel pipe and is leaded to doing over again and increase weldment work, has reduced the waste of steel pipe material, has shortened construction period simultaneously.
Drawings
FIG. 1 is a view showing a state where a main steel pipe and a connecting steel pipe are connected according to the present invention;
FIG. 2 is a partial view of the invention from the A direction;
FIG. 3 is a schematic view of a flat graphic sticker of the present invention;
FIG. 4 is a schematic structural view of the present invention;
reference numbers in the figures: the steel pipe cutting machine comprises a main steel pipe 1, a connecting steel pipe 2, a plane pattern sticker 3, a cutting nozzle 4, channel steel 5 and a cutting line 21.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1-4, a cutting device for a curved surface of a connecting steel pipe comprises a connecting steel pipe 2, a planar pattern sticker 3 coated outside the connecting steel pipe 2, a cutting line 21 arranged on the connecting steel pipe 2 along the curve of the planar pattern sticker 3, and a cutting nozzle 4 moving on the connecting steel pipe 2 along the cutting line 21.
The channel steel 5 is arranged below the connecting steel pipe 2, so that the cutting accuracy of the connecting steel pipe 2 is not influenced by gravity sag when the cutting nozzle 4 cuts three quarters of the connecting steel pipe 2.
The planar graphic sticker 3 is converted from a three-dimensional curved surface diagram, the three-dimensional cross-connection curved surface of the main steel pipe 1 and the connecting steel pipe 2 is projected on a two-dimensional plane by utilizing the differential principle, the two-dimensional plane is printed on the planar graphic sticker 3 by printing the two-dimensional plane in equal proportion, and the planar graphic sticker 3 is used for wrapping the connecting steel pipe 2 to be cut so as to obtain the cutting line 21 of the connecting steel pipe.
The utility model provides a cutting device of connection steel pipe curved surface, includes that the side of main steel pipe 1, main steel pipe 1 is connected with the connection steel pipe 2 that the slant was laid, and a plurality of main steel pipes 1 utilize horizontal or slant connection steel pipe 2 to link into an integrated entity a plurality of main steel pipes 1, strengthen whole support's stability, antidumping ability.
A cutting method for a curved surface of a connecting steel pipe comprises the following steps:
step one, real object modeling: and drawing a real object three-dimensional graph according to parameters such as the diameters, the lap joint angles, the lap joint positions and the like of the main steel pipe 1 and the connecting steel pipes 2 in a design drawing, wherein the three-dimensional graph modeling is preferably CAD three-dimensional modeling.
Step two, converting the three-dimensional surface graph into a two-dimensional plane graph: extracting three-dimensional curved surfaces intersected by the main steel pipe 1 and the connecting steel pipe 2, differentiating the extracted three-dimensional curved surfaces into a plurality of equant points, wherein the number of the equant points is selected according to the diameter of the connecting steel pipe, ensuring that the subsequently calculated curved surfaces are smooth and meet the precision requirement, further calculating the length of each equant point and a standard cross section, taking the standard cross section as an abscissa, calculating the length as an ordinate, drawing all the lengths into a plane coordinate axis in sequence, connecting end points by using simulation curves, finally obtaining a two-dimensional plane graph of the intersected three-dimensional curved surfaces, and then marking the length of the abscissa and the height of the ordinate in the graph.
Step three, manufacturing a plane graphic sticker: printing the two-dimensional plane graph according to the actual marking size, and checking whether the marking data on the sticker is matched with the actual measurement data; and cutting the shadow part along the curve after the data correspond, and finishing the manufacture of the plane graphic paster 3.
Step four, cutting the steel pipe: the cut paster is wrapped on the connecting steel pipe 2 to be cut, a cutting line 21 is carved along the paster curve by using a stone pen, the carved cutting line 21 is used as a reference during cutting, the cutting nozzle 4 is uniformly pushed to move, and the connecting steel pipe 2 is rotated at any time to enable a cutting point to be upward until the cutting is finished.
During cutting, a flat and open place is selected for cutting the steel pipe, the stability of the steel pipe is constantly kept, the steel pipe is prevented from rolling to influence the line shape of a cutting surface, the cutting torch 4 moves smoothly and stably along the cutting line 21, the cutting torch 4 adopts sprayed gas for cutting, the pressure of the sprayed gas needs to be stable when the cutting torch 4 cuts, and the quality of the cutting section is obviously deteriorated due to the fluctuating oxygen pressure; of course, the air pressure should be adjusted according to the type of cutting tip used and the thickness of the steel pipe to be cut.
Step five: when cutting three fourths of connecting steel pipe 2, having cushioned channel-section steel 5 under the part of waiting to cut, keep the stability of cutting, prevent to connect steel pipe 2 and receive the flagging accuracy that influences the cutting of gravity.
Step six: the cutting part of the connecting steel pipe 2 is polished, the smooth lap joint of the connecting steel pipe 2 and the main steel pipe 1 is guaranteed, gaps at the lap joint of the connecting steel pipe 2 and the main steel pipe 1 are reduced, and the lap joint quality and the construction efficiency are improved.
Step seven: and the welding of the cutting part of the connecting steel pipe 2 and the designated position of the main steel pipe 1 is realized.
And the size of the standard section in the second step is the perimeter of the connecting steel pipe 2, so that the plane graphic sticker is completely attached to the connecting steel pipe 2.
The ratio of the size of the plane graphic sticker to the actual marked size in the third step is 1:1, and a field operator only needs to print according to the actual size of the plane graphic sticker, can quickly grasp the size, and improves the working efficiency.
The number of the bisectors of the three-dimensional curved surface subdivision in the step two is 50, and the smooth curved surface on the plane graph sticker can be approximately ensured according to the number obtained in the actual operation.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention; thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Although the reference numerals in the figures are used more here: the main steel pipe 1, the connecting steel pipe 2, the plane graphic sticker 3, the cutting nozzle 4, the channel steel 5, the cutting line 21 and other terms are used, but the possibility of using other terms is not excluded; these terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (10)
1. The utility model provides a cutting device of connection steel pipe curved surface which characterized in that: the cutting device comprises a connecting steel pipe (2), a plane pattern sticker (3) coated outside the connecting steel pipe (2), cutting lines (21) arranged on the connecting steel pipe (2) along the curve of the plane pattern sticker (3), and a cutting nozzle (4) moving on the connecting steel pipe (2) along the cutting lines (21).
2. The cutting device for the curved surface of the steel pipe according to claim 1, wherein: and channel steel (5) is arranged below the connecting steel pipe (2).
3. The cutting device for the curved surface of the steel pipe according to claim 1, wherein: the steel tube comprises a main steel tube (1), wherein the side surface of the main steel tube (1) is connected with a connecting steel tube (2) which is obliquely arranged.
4. A cutting method for a curved surface of a connecting steel pipe is characterized by comprising the following steps: the method comprises the following steps:
step one, real object modeling: drawing a real object three-dimensional graph according to parameters such as the diameters, the lap joint angles, the lap joint positions and the like of the main steel pipe (1) and the connecting steel pipes (2) in a design drawing;
step two, converting the three-dimensional surface graph into a two-dimensional plane graph: extracting three-dimensional curved surfaces intersected by the main steel pipe (1) and the connecting steel pipe (2), differentiating the extracted three-dimensional curved surfaces into a plurality of equally divided points, calculating the length of each equally divided point and a standard section, taking the standard section as an abscissa, calculating the length as an ordinate, sequentially drawing all the lengths into a plane coordinate axis, connecting end points by using simulation curves, finally obtaining a two-dimensional plane graph of the intersected three-dimensional curved surfaces, and then marking the length of the abscissa and the height of the ordinate in the graph;
step three, manufacturing a plane graphic sticker: printing the two-dimensional plane graph according to the actual marking size, and checking whether the marking data on the sticker is matched with the actual measurement data; after the data correspond to each other, the shadow part is cut off along the curve, and the plane graphic paster (3) is manufactured;
step four, cutting the steel pipe: the cut paster is wrapped on the connecting steel pipe (2) to be cut, a cutting line (21) is carved along the paster curve by using a stone pen, the carved cutting line (21) is used as a reference during cutting, the cutting nozzle (4) is uniformly pushed to move, and the connecting steel pipe (2) is rotated at any time to enable a point to be cut to be upward until the cutting is completed.
5. The method for cutting the curved surface of the connecting steel pipe as claimed in claim 4, wherein: the method comprises the following steps:
step five, padding channel steel under the steel pipe: when three fourths of the connecting steel pipe (2) is cut, a channel steel (5) is padded below the part to be cut.
6. The method for cutting the curved surface of the connecting steel pipe as claimed in claim 5, wherein: the method comprises the following steps:
step six, polishing and cutting the steel pipe: and (3) polishing the cutting part of the connecting steel pipe (2).
7. The method for cutting the curved surface of the steel pipe according to claim 6, wherein: the method comprises the following steps:
step seven, connecting the steel pipes: and welding the cutting part of the connecting steel pipe (2) with the designated position of the main steel pipe (1).
8. The method for cutting the curved surface of the connecting steel pipe as claimed in claim 4, wherein: and the length of the standard section in the second step is the perimeter of the connecting steel pipe (2).
9. The method for cutting the curved surface of the connecting steel pipe as claimed in claim 4, wherein: and the ratio of the size of the plane graphic sticker in the third step to the actual marked size is 1: 1.
10. The method for cutting the curved surface of the connecting steel pipe as claimed in claim 4, wherein: and the number of the bisected points of the three-dimensional curved surface in the second step is 50.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110612696.3A CN113441810A (en) | 2021-06-02 | 2021-06-02 | Cutting device and method for curved surface of connecting steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110612696.3A CN113441810A (en) | 2021-06-02 | 2021-06-02 | Cutting device and method for curved surface of connecting steel pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113441810A true CN113441810A (en) | 2021-09-28 |
Family
ID=77810557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110612696.3A Withdrawn CN113441810A (en) | 2021-06-02 | 2021-06-02 | Cutting device and method for curved surface of connecting steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113441810A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117148807A (en) * | 2023-10-30 | 2023-12-01 | 江苏银家不锈钢管业有限公司 | Method and device for controlling machining of stainless steel pipe |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101961810A (en) * | 2009-07-24 | 2011-02-02 | 王正怡 | Construction method for manufacturing multi-pipe intersecting steel pipe component |
| US20110132159A1 (en) * | 2009-12-03 | 2011-06-09 | Goodman Jr Donald L | Template devices for cutting and marking sheet metal |
| CN104999158A (en) * | 2015-07-31 | 2015-10-28 | 中国海洋石油总公司 | Manual cutting technology for saddle grooves in ends of large-diameter steel pipe |
| CN106393046A (en) * | 2016-08-31 | 2017-02-15 | 中船黄埔文冲船舶有限公司 | Opening method for pipe intersecting hole |
| CN107378407A (en) * | 2017-09-01 | 2017-11-24 | 中建局集团第建筑有限公司 | Construction method of large-section intersecting circular tube steel member |
| CN110076745A (en) * | 2019-06-03 | 2019-08-02 | 包头钢铁（集团）有限责任公司 | Steel pipe construction lofting tools and setting out method |
-
2021
- 2021-06-02 CN CN202110612696.3A patent/CN113441810A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101961810A (en) * | 2009-07-24 | 2011-02-02 | 王正怡 | Construction method for manufacturing multi-pipe intersecting steel pipe component |
| US20110132159A1 (en) * | 2009-12-03 | 2011-06-09 | Goodman Jr Donald L | Template devices for cutting and marking sheet metal |
| CN104999158A (en) * | 2015-07-31 | 2015-10-28 | 中国海洋石油总公司 | Manual cutting technology for saddle grooves in ends of large-diameter steel pipe |
| CN106393046A (en) * | 2016-08-31 | 2017-02-15 | 中船黄埔文冲船舶有限公司 | Opening method for pipe intersecting hole |
| CN107378407A (en) * | 2017-09-01 | 2017-11-24 | 中建局集团第建筑有限公司 | Construction method of large-section intersecting circular tube steel member |
| CN110076745A (en) * | 2019-06-03 | 2019-08-02 | 包头钢铁（集团）有限责任公司 | Steel pipe construction lofting tools and setting out method |
Non-Patent Citations (1)
| Title |
|---|
| 夏阳: "钢管相贯切割及组焊技术", 《安徽建筑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117148807A (en) * | 2023-10-30 | 2023-12-01 | 江苏银家不锈钢管业有限公司 | Method and device for controlling machining of stainless steel pipe |
| CN117148807B (en) * | 2023-10-30 | 2024-01-26 | 江苏银家不锈钢管业有限公司 | Method and device for controlling machining of stainless steel pipe |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104792274B (en) | A kind of measuring method of circular tunnel convergent deformation | |
| CN104765936B (en) | Deployed based on Autodesk inventor software three-dimensional modelings and generate the operating method of setting-out coordinate | |
| CN111578916B (en) | Intelligent paying-off construction method in decoration engineering based on BIM technology | |
| CN110409841B (en) | Construction method of hyperbolic pipe truss structure | |
| CN102839747A (en) | Construction method for steel structure truss of super high-rise special structure | |
| CN107988908A (en) | The total assembling method of tubular arch | |
| CN101961810A (en) | Construction method for manufacturing multi-pipe intersecting steel pipe component | |
| CN109669425A (en) | A kind of method of urban duct construction site group to control | |
| CN113441810A (en) | Cutting device and method for curved surface of connecting steel pipe | |
| CN106638318A (en) | Method for positioning anchor point of beam end of cable stayed bridge and installation method of cable guide pipe | |
| CN102661046A (en) | Method for manufacturing tubular joint of small-angle fully bent tube | |
| CN105665952B (en) | The steam generator compartment of nuclear power station and the channel module packaging technology that reloads | |
| CN111272119A (en) | Elbow measuring device and measuring method | |
| CN108507357B (en) | Laying-out method for bricks lined in three-way pipeline of industrial furnace | |
| CN104775612A (en) | Three-dimensional distorted rotating inclined reinforced concrete frame structure template and construction method thereof | |
| CN101819035B (en) | Detection method used for manufacturing CRTS II type track slabs | |
| CN110565856B (en) | Quick installation method for double-curved-surface metal plate curtain wall | |
| CN206917026U (en) | A kind of steel disc shape node component for special-shaped Curtain wall frame | |
| CN106975675A (en) | The wind-powered electricity generation steel-pipe pile shell rolling technique of system and the application system is monitored and controlled in a kind of light sensation of veneer reeling machine | |
| CN110116153B (en) | Cold bending manufacturing method for large-diameter steel pipe | |
| CN110534215B (en) | Pipeline installation parallelism checking method | |
| CN115451811A (en) | Measurement method for digital coordination of rocket pressurized conveying pipeline | |
| CN101458508A (en) | Tube-tube connection saddle surface welding and incising method | |
| CN107165317A (en) | It is a kind of to be used for the steel disc shape node component and application process of special-shaped Curtain wall frame | |
| CN106323169A (en) | Sphere center coordinate positioning method |
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 | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210928 |
|
| WW01 | Invention patent application withdrawn after publication |