CN112475529A - Numerical control cutting method, steel structure and ship - Google Patents
Numerical control cutting method, steel structure and ship Download PDFInfo
- Publication number
- CN112475529A CN112475529A CN202011268309.0A CN202011268309A CN112475529A CN 112475529 A CN112475529 A CN 112475529A CN 202011268309 A CN202011268309 A CN 202011268309A CN 112475529 A CN112475529 A CN 112475529A
- Authority
- CN
- China
- Prior art keywords
- cutting
- workpiece
- starting point
- edge
- numerical control
- 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.)
- Pending
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
- B23K7/002—Machines, apparatus, or equipment for cutting plane workpieces, e.g. plates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/18—Sheet panels
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a numerical control cutting method, a steel structure and a ship, and relates to the technical field of ship manufacturing or steel structure manufacturing. The numerical control cutting method comprises the following steps: s1, fixing the steel plate on a cutting machine; s2, selecting the workpiece close to the edge of the steel plate as a first workpiece, selecting a starting point on the first workpiece, and aligning the cutting head of the cutting machine with the starting point; s3, starting the cutting machine, and cutting one edge of each workpiece from the starting point in sequence until the cutting of one edge of the last workpiece far away from the first workpiece is finished; and S4, operating the cutting machine to move reversely, and cutting the residual edge of each workpiece from the last workpiece until the residual edge returns to the starting point of the first workpiece. When the workpiece is cut by the method, only one cutting starting point is provided, so that the consumption of consumable articles of a cutting nozzle of the cutting machine can be reduced; meanwhile, each workpiece is continuously cut, and the workpieces are not connected by a bridge, so that the cutting efficiency of the workpieces is improved, and the workload of workers can be reduced.
Description
Technical Field
The invention relates to the technical field of ship manufacturing or steel structure manufacturing, in particular to a numerical control cutting method, a steel structure and a ship.
Background
The numerical control cutting of the steel parts generally realizes automatic cutting through cutting codes by a cutting machine. At present, the numerical control cutting modes mainly comprise two modes, wherein the first mode is that one part is cut and then the next part is cut, and the second mode is that the parts are directly connected through bridging to achieve the purpose of continuous cutting. Above-mentioned first cutting mode has a large amount of cutting starting points and arc extinguishing point, influences cutting efficiency and cutting consumable consumption, and the second mode increases the work that the bridge can be connected in the on-the-spot secondary cutting of bridging, still can influence the cutting quality of part, has increased designer's work load simultaneously in a large number.
Disclosure of Invention
The invention aims to provide a numerical control cutting method, a steel structure and a ship, which can realize continuous cutting, improve the cutting efficiency, reduce the consumption of cutting consumables and reduce the workload of workers.
In order to achieve the purpose, the invention adopts the following technical scheme:
a numerical control cutting method for cutting a plurality of workpieces on a steel plate, comprising the steps of:
s1, fixing the steel plate on a cutting machine;
s2, selecting the workpiece close to the edge of the steel plate as a first workpiece, selecting a starting point on the first workpiece, and aligning a cutting head of the cutting machine to the starting point;
s3, starting the cutting machine, and sequentially cutting one edge of each workpiece from the starting point until the cutting of one edge of the last workpiece far away from the first workpiece is finished;
and S4, operating the cutting machine to move reversely, and cutting the residual edge of each workpiece from the last workpiece in sequence until the workpiece returns to the starting point of the first workpiece.
Optionally, before step S1, step S0 is further included:
and S0, scribing the outlines of the workpieces on the steel plate.
Optionally, in step S2, the starting point is a vertex of the first workpiece near the edge of the steel plate.
Optionally, the cutting head is a cutting flame.
Optionally, step S3 specifically includes: and starting the cutting machine, sequentially cutting one edge of each workpiece from the starting point, keeping the cutting flame of the cutting machine closed and the preheating flame open at a position between two adjacent workpieces, and finishing cutting one edge of the last workpiece far away from the first workpiece.
Optionally, step S4 specifically includes: operating the cutter in reverse motion to cut the remaining edges of each of the workpieces in sequence starting with the last of the workpieces, maintaining the cutting flame of the cutter off and the preheating flame on at a location between adjacent two of the workpieces until returning to the starting point of the first workpiece.
Optionally, in steps S3 and S4, when the edge of the workpiece is cut, the cutting head of the cutting machine is adjusted to be in a tilted state when a situation that beveling is required is met.
Optionally, step S5 is further included after step S4: and after the cutting machine returns to the starting point of the first workpiece, continuing cutting for a certain distance to enable the first workpiece to be separated from the steel plate.
A steel structure comprises the workpiece cut by the numerical control cutting method.
A ship comprising the steel structure.
The invention has the beneficial effects that: the numerical control cutting method provided by the invention is used for cutting a plurality of workpieces on a steel plate, and firstly, the steel plate is fixed on a cutting machine; then selecting a workpiece close to the edge of the steel plate as a first workpiece, selecting a starting point on the first workpiece, and aligning a cutting head of the cutting machine to the starting point; starting the cutting machine, and sequentially cutting one edge of each workpiece from the starting point until the edge of the last workpiece far away from the first workpiece is cut; and finally, operating the cutting machine to move reversely, and sequentially cutting the residual edge of each workpiece from the last workpiece until the residual edge returns to the starting point of the first workpiece. When a plurality of workpieces are cut by the method, only one cutting starting point is provided, so that the consumption of consumable articles of a cutting nozzle of the cutting machine can be reduced; meanwhile, each workpiece is continuously cut, and the workpieces are not connected by a bridge, so that the cutting efficiency of the workpieces is improved, the work of connecting the bridges by secondary cutting is avoided, and the workload of workers can be reduced.
Drawings
FIG. 1 is a flow chart of the main steps of a numerical control cutting method provided by the embodiment of the invention;
FIG. 2 is a flow chart illustrating the detailed steps of a numerical control cutting method according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of the numerical control cutting method provided by the embodiment of the invention during cutting.
In the figure:
1-a steel plate;
2-a workpiece; 21-origin.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present 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.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 3, the numerical control cutting method is used to cut a plurality of workpieces 2 on a steel plate 1. As shown in fig. 1, a flow chart of main steps of the numerical control cutting method mainly includes the following steps:
s1, fixing the steel plate 1 on a cutting machine;
s2, selecting the workpiece 2 close to the edge of the steel plate 1 as a first workpiece, selecting a starting point 21 on the first workpiece, and aligning a cutting head of the cutting machine to the starting point 21;
s3, starting the cutting machine, and sequentially cutting one edge of each workpiece 2 from the starting point 21 until the cutting of one edge of the last workpiece 2 far away from the first workpiece is finished;
s4, the cutting machine is operated to move in reverse, and the remaining edge of each workpiece 2 is cut in sequence from the last workpiece 2 until the starting point 21 of the first workpiece is reached.
It can be understood that when a plurality of workpieces 2 are cut by the method, only one cutting starting point 21 is provided, so that the consumption of consumables of a cutting nozzle of the cutting machine can be reduced; meanwhile, each workpiece 2 is continuously cut, and the workpieces 2 are not connected by a bridge, so that the cutting efficiency of the workpieces 2 is improved, the work of connecting the bridges by secondary cutting is avoided, and the workload of workers can be reduced.
Alternatively, as shown in fig. 3, the starting point 21 in step S2 is a vertex of the first workpiece near the edge of the steel plate 1. It can be understood that the cutting machine can conveniently cut by selecting the vertex as the starting point 21, and the cutting is performed along one edge where the vertex is located, so that the cutting step can be simplified. In this embodiment, the steel plate 1 and the workpiece 2 are both rectangular, and one vertex of the bottom of the workpiece 2 is selected as the starting point 21. In other embodiments, the starting point 21 may be selected at a suitable position for workpieces 2 of other shapes.
In particular, the cutting head is a cutting flame. It can be understood that the flame cutting has low cost, and the cost loss of the numerical control cutting method in the process of cutting the workpiece 2 can be reduced. In other embodiments, other cutting heads may be used according to the thickness of the steel plate 1 to be cut.
As shown in fig. 2, a detailed step flow chart of the numerical control cutting method specifically includes the following steps:
s0, the contours of the plurality of workpieces 2 are scribed on the steel sheet 1.
It can be understood that, for the sake of easy cutting, when scribing on the steel plate 1, it is ensured that the bottom edges of the plurality of workpieces 2 are aligned as much as possible, and simultaneously, the scribing portion between two workpieces 2 uses a dotted line, and the contour line of the workpiece 2 uses a solid line, for the purpose of distinction. In this embodiment, the shape and size of the workpiece 2 are the same, so that it can be ensured that the upper and lower edges of the workpiece 2 are aligned during scribing, thereby facilitating cutting. In other embodiments, if the shape and size of the workpiece 2 are different, only one edge of the bottom is required to be aligned.
S1, fixing the steel plate 1 on a cutting machine;
and S2, selecting the workpiece 2 close to the edge of the steel plate 1 as a first workpiece, selecting a starting point 21 on the first workpiece, and aligning a cutting head of the cutting machine with the starting point 21.
Specifically, after the steel plate 1 is scribed, the steel plate is fixed on a cutting machine, and then the cutting flame of the cutting machine is adjusted to be aligned with the starting point 21, so that the preparation work before cutting is completed.
And S3, starting the cutting machine, cutting one edge of each workpiece 2 in sequence from the starting point 21, keeping the cutting flame of the cutting machine closed and the preheating flame open at the position between two adjacent workpieces 2 until the cutting of one edge of the last workpiece 2 far away from the first workpiece is finished.
In this embodiment, the scribing along the dotted line is performed during cutting between two workpieces 2, and the cutting flame of the cutting machine is kept closed and the preheating flame is kept open, so that it can be ensured that two adjacent workpieces 2 are not cut off, thereby ensuring the connectivity between two adjacent workpieces 2 and further improving the subsequent cutting effect. In other embodiments, the scribe line at the dashed line position between the two workpieces 2 may also be cut off, i.e., the cutting flame is kept open all the time, which also can ensure the subsequent cutting of the workpieces 2, and may be adaptively selected according to actual cutting conditions.
S4, operating the cutting machine to move in reverse, cutting the remaining edges of each workpiece 2 in sequence starting from the last workpiece 2, keeping the cutting flame of the cutting machine off and the preheating flame on at the position between two adjacent workpieces 2 until returning to the starting point 21 of the first workpiece.
In this embodiment, when the cutting machine performs reverse cutting, the cutting machine performs scribing along a reverse dotted line between the two workpieces 2, and keeps the cutting flame of the cutting machine off and the preheating flame on, so that the cutting air source can be saved. In other embodiments, during reverse cutting, the two workpieces 2 may be scribed according to a dashed line during forward cutting, or the scribing at the dashed line position may be selectively cut off, that is, the cutting flame is kept on all the time, the cutting effect is not affected, and the method may be adaptively selected according to actual cutting conditions.
Specifically, in steps S3 and S4, when the edge of the workpiece 2 is cut, the cutting head of the cutting machine is adjusted to be in a tilted state when a situation that beveling is required is encountered. It can be understood that the numerical control cutting method is also applicable when meeting the condition of needing to open the groove, only needs to adjust the state of the cutting head, and after the groove is opened, the cutting head is adjusted, so that the operation is simple and convenient.
S5: after the cutting machine returns to the starting point 21 of the first workpiece, the cutting is continued for a certain distance so that the first workpiece is separated from the steel plate 1.
After the cutter returns to the starting point 21, as shown in fig. 3, the cutting continues down the scribe line for a distance to ensure that the first workpiece is completely cut. The cutting distance is not limited herein, and it is only necessary to ensure that the first workpiece can be detached from the steel plate 1.
The embodiment also provides a steel structure which comprises a workpiece 2 cut by the numerical control cutting method. In the manufacturing process of the steel structure, the workpiece 2 is cut by the numerical control cutting method, so that the cutting efficiency can be improved, the workload of workers is reduced, and the manufacturing speed of the steel structure is increased.
The embodiment also provides a ship which comprises the steel structure.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A numerical control cutting method for cutting a plurality of workpieces (2) on a steel sheet (1), characterized by comprising the steps of:
s1, fixing the steel plate (1) on a cutting machine;
s2, selecting the workpiece (2) close to the edge of the steel plate (1) as a first workpiece, selecting a starting point (21) on the first workpiece, and aligning a cutting head of the cutting machine to the starting point (21);
s3, starting the cutting machine, and sequentially cutting one edge of each workpiece (2) from the starting point (21) until the cutting of one edge of the last workpiece (2) far away from the first workpiece is finished;
and S4, operating the cutting machine to move reversely, and cutting the residual edge of each workpiece (2) from the last workpiece (2) in sequence until the workpiece returns to the starting point (21) of the first workpiece.
2. The numerical control cutting method according to claim 1, further comprising step S0 before step S1:
and S0, scribing the outlines of the workpieces (2) on the steel plate (1).
3. The numerical control cutting method according to claim 1, wherein the starting point (21) is a vertex of the first workpiece near the edge of the steel plate (1) in step S2.
4. The numerical control cutting method according to claim 1, wherein the cutting head is a cutting flame.
5. The numerical control cutting method according to claim 4, wherein the step S3 specifically includes: starting the cutting machine, cutting one edge of each workpiece (2) from the starting point (21) in sequence, keeping the cutting flame of the cutting machine closed and the preheating flame open at a position between two adjacent workpieces (2) until the edge of the last workpiece (2) far away from the first workpiece is cut.
6. The numerical control cutting method according to claim 5, wherein the step S4 specifically includes: operating the cutting machine in a reverse movement, cutting the remaining edge of each workpiece (2) in sequence starting from the last workpiece (2), keeping the cutting flame of the cutting machine off and the preheating flame on at a position between two adjacent workpieces (2) until returning to the starting point (21) of the first workpiece.
7. The numerical control cutting method according to claim 1, characterized in that in steps S3 and S4, when a situation that beveling is required is encountered while cutting the edge of the workpiece (2), the cutting head of the cutting machine is adjusted to a tilted state.
8. The numerical control cutting method according to claim 1, further comprising a step S5 after the step S4: and after the cutting machine returns to the starting point (21) of the first workpiece, continuing cutting for a certain distance to enable the first workpiece to be separated from the steel plate (1).
9. A steel structure, characterized by comprising said workpiece (2) cut with the numerical control cutting method according to any one of claims 1 to 8.
10. A ship, characterized by comprising the steel structure of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011268309.0A CN112475529A (en) | 2020-11-13 | 2020-11-13 | Numerical control cutting method, steel structure and ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011268309.0A CN112475529A (en) | 2020-11-13 | 2020-11-13 | Numerical control cutting method, steel structure and ship |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112475529A true CN112475529A (en) | 2021-03-12 |
Family
ID=74930778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011268309.0A Pending CN112475529A (en) | 2020-11-13 | 2020-11-13 | Numerical control cutting method, steel structure and ship |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112475529A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115255560A (en) * | 2022-07-28 | 2022-11-01 | 湖南中联重科履带起重机有限公司 | Plate cutting method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10263856A (en) * | 1997-03-21 | 1998-10-06 | Komatsu Ltd | Thermal cutting device |
| CN102091846A (en) * | 2010-12-28 | 2011-06-15 | 上海人造板机器厂有限公司 | Numerical-control gas cutting method for part with oblique machining surface |
| CN102873429A (en) * | 2012-09-15 | 2013-01-16 | 山西晋城无烟煤矿业集团有限责任公司 | Continuous cutting process suitable for small workpieces |
| CN103567595A (en) * | 2012-07-23 | 2014-02-12 | 中国北车集团大同电力机车有限责任公司 | Workpiece cutting method |
| CN104858525A (en) * | 2015-05-19 | 2015-08-26 | 中建钢构有限公司 | Numerical control flame double-gun cutting and striking arc connecting bridge cutting method |
| CN105562882A (en) * | 2016-03-03 | 2016-05-11 | 湖北浩南钢结构工程有限公司 | Method for cutting and discharging of box column web |
| CN105935826A (en) * | 2016-05-30 | 2016-09-14 | 中建钢构武汉有限公司 | Metal plate common-edge cutting method |
-
2020
- 2020-11-13 CN CN202011268309.0A patent/CN112475529A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10263856A (en) * | 1997-03-21 | 1998-10-06 | Komatsu Ltd | Thermal cutting device |
| CN102091846A (en) * | 2010-12-28 | 2011-06-15 | 上海人造板机器厂有限公司 | Numerical-control gas cutting method for part with oblique machining surface |
| CN103567595A (en) * | 2012-07-23 | 2014-02-12 | 中国北车集团大同电力机车有限责任公司 | Workpiece cutting method |
| CN102873429A (en) * | 2012-09-15 | 2013-01-16 | 山西晋城无烟煤矿业集团有限责任公司 | Continuous cutting process suitable for small workpieces |
| CN104858525A (en) * | 2015-05-19 | 2015-08-26 | 中建钢构有限公司 | Numerical control flame double-gun cutting and striking arc connecting bridge cutting method |
| CN105562882A (en) * | 2016-03-03 | 2016-05-11 | 湖北浩南钢结构工程有限公司 | Method for cutting and discharging of box column web |
| CN105935826A (en) * | 2016-05-30 | 2016-09-14 | 中建钢构武汉有限公司 | Metal plate common-edge cutting method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115255560A (en) * | 2022-07-28 | 2022-11-01 | 湖南中联重科履带起重机有限公司 | Plate cutting method |
| CN115255560B (en) * | 2022-07-28 | 2024-04-26 | 湖南中联重科履带起重机有限公司 | Plate cutting method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10195682B2 (en) | Method and system for enhanced numerical control plasma cutting of parts from a workpiece | |
| EP1995013B1 (en) | Method and System for eliminating external piercing in nc cutting of nested parts | |
| CN108465944B (en) | Nesting path optimization method applied to pipe part common-edge cutting | |
| US20060135041A1 (en) | Stonecutting apparatus and method using saw and water jet | |
| CN103331504A (en) | Single-side welding and double-side forming welding method for ceramic gasket | |
| CN205414567U (en) | Panel cutting platform | |
| CN205521797U (en) | Numerical control five -axis machining center of carpenter's tenon | |
| CN112475529A (en) | Numerical control cutting method, steel structure and ship | |
| CN108817864A (en) | A kind of forming of titanium alloy arc-shaped workpiece and positional dissection method | |
| CN205662454U (en) | Glass -cutting all -in -one | |
| CN205045988U (en) | Glass processing all -in -one | |
| CN109571495A (en) | A kind of method of shipbuilding sections cutting | |
| CN210452141U (en) | Glass edge grinding machine capable of chamfering R angle and grinding edge | |
| CN109904284A (en) | A kind of method that component monolithic is reprocessed after lamination | |
| CN111230646A (en) | Glass edge grinding machine capable of chamfering and grinding edges and glass chamfering method | |
| CN205763944U (en) | A kind of chip-breaker cutter | |
| CN105414892A (en) | Method for welding and manufacturing H-shaped steel with cellular holes in web through ship position model | |
| CN206048543U (en) | A kind of efficient makita 4100NH of utilization expansion link | |
| CN104786119A (en) | Grinding tool used for machining glass cover plate | |
| CN105965045A (en) | Chip breaking groove cutter and processing method | |
| CN207606290U (en) | A kind of two-sided groove profile Indexable cutting inserts of finishing | |
| CN208289580U (en) | A kind of workbench and push away burr equipment | |
| CN201735930U (en) | Manual proceeding rail for flame cutting knife | |
| CN205927297U (en) | Industry steel tube cutting machine | |
| CN104785990B (en) | A kind of large-scale model butt welding template and flat welding process |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210312 |
|
| RJ01 | Rejection of invention patent application after publication |