CN110756978A - Welding process of convex cylindrical support seat on curved conical section shell - Google Patents
Welding process of convex cylindrical support seat on curved conical section shell Download PDFInfo
- Publication number
- CN110756978A CN110756978A CN201911184875.0A CN201911184875A CN110756978A CN 110756978 A CN110756978 A CN 110756978A CN 201911184875 A CN201911184875 A CN 201911184875A CN 110756978 A CN110756978 A CN 110756978A
- Authority
- CN
- China
- Prior art keywords
- annular
- supporting seat
- cylindrical supporting
- limiting step
- outward
- 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
- 238000003466 welding Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000010894 electron beam technology Methods 0.000 claims abstract description 21
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 239000007787 solid Substances 0.000 description 5
- 230000001154 acute effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000035515 penetration 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
- B23K15/00—Electron-beam welding or cutting
- B23K15/06—Electron-beam welding or cutting within a vacuum chamber
-
- 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
- B23K15/00—Electron-beam welding or cutting
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Welding Or Cutting Using Electron Beams (AREA)
Abstract
The invention discloses a welding process of a convex cylindrical supporting seat on a curved conical section shell, which solves the problems of low welding quality and insufficient weld joint detection when a cylindrical supporting seat is welded on the curved conical section shell. An externally convex cylindrical support seat mounting hole (2) is formed in the curved conical section shell (1), an externally convex cylindrical support seat (3) is arranged in the externally convex cylindrical support seat mounting hole (2), a second annular externally convex limiting step (6) is arranged on the outer circular side wall of the externally convex cylindrical support seat (3), and a vacuum electron beam welding seam (10) is arranged between a step annular vertical face (9) of the second annular externally convex limiting step and the inner cavity side wall of the externally convex cylindrical support seat mounting hole; the step annular vertical surface (9) of the second annular outwards-protruding limiting step (6) is arranged on the outer side of the outer circular side wall (7) of the externally-protruding cylindrical supporting seat. The implementation of vacuum electron beam welding and the detection of the quality of the welding seam are facilitated.
Description
Technical Field
The invention relates to a welding process of a supporting seat, in particular to a welding process of an externally convex supporting seat on a curved conical section shell.
Background
Some underwater products use a closed, sealed housing consisting of a straight section housing and a curved section housing; the specific shape of the curved conical section adopted by a certain section of the shell is as follows: the section of shell is a revolving body with a large end and a small end with a diameter difference, and an included angle between the conical surface of the section of revolving body and the central axis of the revolving body is changed, so that each generatrix of the section of conical surface is in a curve shape; based on the functional requirements of products, four solid cylindrical externally convex supporting seats are connected to the curved conical section shell in a welding mode, and the external protrusions of the cylindrical supporting seats are used for connecting other functional parts; the central axis of each solid cylindrical supporting seat is mutually perpendicular to the central axis of the curve conical section shell, the arrangement mode leads the central axis of each solid cylindrical supporting seat to be not perpendicular to a shell bus but form a certain acute angle, and after the solid cylindrical supporting seats are welded with the curve conical section shell, the cylindrical supporting seats respectively exceed the outer surface of the curve conical section shell by a certain height; the field assembly process is as follows: the method comprises the steps that a mounting hole of a cylindrical supporting seat is machined in a curve conical section shell, mounting and positioning are carried out in a scribing mode on the outer side surface of the cylindrical supporting seat, the machined solid cylindrical supporting seat is placed on the mounting hole for positioning, and as the connecting positions of the cylindrical supporting seat and the curve conical section shell are both curves, the curve of a combination position is difficult to accurately scribe on the outer side surface of the cylindrical supporting seat, only an assembly mark vertical to a central axis can be scribed, and accurate positioning is difficult to perform during assembly; in addition, in the prior art, a cylindrical support seat is welded on a shell, a welding groove is arranged on a corresponding support seat mounting hole of the shell, the support seat and the shell are connected together by fillet welding through manual welding, and because the outer side wall of the cylindrical support seat and the outer side of a curved conical section shell form an acute angle, when the fillet welding is carried out, the problem of poor accessibility of a welding gun exists, the local position cannot be welded, and the phenomenon of incomplete penetration is often formed; if the method of vacuum electron beam welding is adopted, because the outer side surface of the cylindrical supporting seat is a vertical surface, no displacement difference exists between the welding position and the outer surface of the cylindrical supporting seat, and the vacuum electron beam welding gun cannot weld to the joint from the direction parallel to the outer side surface of the supporting seat; if the vacuum electron beam welding gun can finish welding from the direction of inclining the outer side surface of the supporting seat, the defects that the welding seam can only realize local connection and cannot realize full-thickness connection after welding exist; meanwhile, after welding is completed, flaw detection needs to be carried out on the welding seam, the welding defect of the full-depth welding seam can be detected only by generally requiring X rays to be detected in a state of being parallel to and overlapped with the welding seam during X-ray flaw detection, and as the outer side face of the cylindrical supporting seat and the mounting hole of the curve conical section shell are welded in a fillet weld mode, half of fillet weld is fused into the outer side wall of the cylindrical supporting seat during detection, so that the quality of the part of welding seam cannot be detected.
Disclosure of Invention
The invention provides a welding process method of a convex cylindrical supporting seat on a curved conical section shell, which solves the technical problems of low weld quality and incomplete weld detection when a cylindrical supporting seat is welded on the curved conical section shell.
The invention solves the technical problems by the following technical scheme:
the utility model provides a welding process of evagination type cylinder supporting seat on curve conic section casing, includes curve conic section casing, is provided with evagination type cylinder supporting seat mounting hole on curve conic section casing, its characterized in that following step:
firstly, a first annular outward convex limiting step is processed on the outer circle side wall of the outer convex cylindrical supporting seat, the step top surface of the first annular outward-protruding limiting step is provided with a step top surface curved surface, the curved surface shape of the step top surface curved surface is completely the same as the curved surface shape of the curved conical section shell outside the convex cylindrical supporting seat mounting hole, processing a second annular outward-protruding limiting step matched with the installation hole of the outward-protruding cylindrical supporting seat on the outer circular side wall of the outward-protruding cylindrical supporting seat above the first annular outward-protruding limiting step, wherein the annular vertical surface of the second annular outward-protruding limiting step is arranged on the outer side of the outer circular side wall of the outward-protruding cylindrical supporting seat, the vertical surface of the first annular outward-protruding limiting step is arranged on the outer side of the annular vertical surface of the second annular outward-protruding limiting step, and the height of the second annular outward-protruding limiting step is the same as the wall thickness of the curved conical section shell;
secondly, placing the convex cylindrical supporting seat processed in the first step into the curve conical section shell, and then sleeving the convex cylindrical supporting seat on the convex cylindrical supporting seat mounting hole from inside to outside in a sleeving manner, so that the step top surface curved surface of the first annular outwards-convex limiting step is attached to the inner cavity curved surface of the curve conical section shell outside the convex cylindrical supporting seat mounting hole;
thirdly, placing the curved conical section shell into an electron beam vacuum welding chamber, and performing vacuum electron beam welding between the step annular vertical surface of the second annular outwards-protruding limiting step and the inner cavity side wall of the convex cylindrical supporting seat mounting hole to form a vacuum electron beam welding seam;
and fourthly, detecting the vacuum electron beam welding seam through a seam detection device.
A welding structure of an outward convex type cylindrical supporting seat on a curved conical section shell comprises a curved conical section shell, an outward convex type cylindrical supporting seat mounting hole is formed in the curved conical section shell, an outward convex type cylindrical supporting seat is arranged in the outward convex type cylindrical supporting seat mounting hole, a second annular outward convex limiting step is arranged on the outer circular side wall of the outward convex type cylindrical supporting seat, the second annular outward convex limiting step is sleeved in the outward convex type cylindrical supporting seat mounting hole, and a vacuum electron beam welding seam is arranged between an annular vertical face of the step of the second annular outward convex limiting step and the inner cavity side wall of the outward convex type cylindrical supporting seat mounting hole; the annular step vertical face of the second annular outwards-protruding limiting step is arranged on the outer side of the outer circular side wall of the outer convex cylindrical supporting seat, and the height of the second annular outwards-protruding limiting step is the same as the wall thickness of the curve conical section shell.
The outer circular side wall of the outer convex type cylindrical supporting seat below the second annular outwardly convex limiting step is provided with a first annular outwardly convex limiting step, a step top surface curved surface is arranged on the step top surface of the first annular outwardly convex limiting step, the curved surface shape of the step top surface curved surface is identical to the curved surface shape of the curve cone section shell outside the outer convex type cylindrical supporting seat mounting hole, and the step vertical surface of the first annular outwardly convex limiting step is arranged on the outer side of the step annular vertical surface of the second annular outwardly convex limiting step.
The invention greatly simplifies the positioning assembly of the hole seat and the shell through the arrangement of the positioning steps, and the welding seam is arranged on the outer side of the outer side wall of the hole seat through the arrangement of the welding steps which protrude outwards towards the outer side wall of the hole seat, thereby facilitating the implementation of vacuum electron beam welding and providing convenience for the detection of the quality of the welding seam.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the convex cylindrical support seat 3 of the present invention in a front view;
fig. 3 is a schematic structural view of the convex cylindrical support seat 3 of the present invention in a top view.
Detailed Description
The invention is described in detail below with reference to the accompanying drawings:
the utility model provides a welding process of evagination type cylinder supporting seat on curve conic section casing, includes curve conic section casing 1, is provided with evagination type cylinder supporting seat mounting hole 2 on curve conic section casing 1, its characterized in that following step:
firstly, a first annular outward-protruding limiting step 4 is processed on the outer circular side wall of the outward convex type cylindrical supporting seat 3, a step top surface curved surface 5 is arranged on the step top surface of the first annular outward-protruding limiting step 4, the curved surface shape of the step top surface curved surface 5 is completely the same as the curved surface shape of the curved cone section shell outside the outward convex type cylindrical supporting seat mounting hole 2, a second annular outward-protruding limiting step 6 matched with the outward convex type cylindrical supporting seat mounting hole 2 is processed on the outer circular side wall of the outward convex type cylindrical supporting seat 3 above the first annular outward-protruding limiting step 4, a step annular vertical surface 9 of the second annular outward-protruding limiting step 6 is arranged outside the outer circular side wall 7 of the outward convex type cylindrical supporting seat 3, a step vertical surface 8 of the first annular outward-protruding limiting step 4 is arranged outside the step annular vertical surface 9 of the second annular outward-protruding limiting step 6, the height of the second annular outward-protruding limiting step 6 is the same as the wall thickness of the curve conical section shell 1;
secondly, firstly, the convex cylindrical supporting seat 3 processed in the first step is placed in the curve conical section shell 1, and then the convex cylindrical supporting seat 3 is sleeved on the convex cylindrical supporting seat mounting hole 2 from inside to outside, so that the step top surface curved surface 5 of the first annular outward convex limiting step 4 is attached to the inner cavity curved surface of the curve conical section shell outside the convex cylindrical supporting seat mounting hole 2;
thirdly, placing the curved conical section shell 1 into an electron beam vacuum welding chamber, and performing vacuum electron beam welding between a step annular vertical surface 9 of a second annular outwards-protruding limiting step 6 and the inner cavity side wall of the convex cylindrical supporting seat mounting hole 2 to form a vacuum electron beam welding seam 10;
and fourthly, detecting the vacuum electron beam welding seam 10 through a seam detection device.
A welding structure of an outward convex type cylindrical support seat on a curved conical section shell comprises a curved conical section shell 1, an outward convex type cylindrical support seat mounting hole 2 is formed in the curved conical section shell 1, an outward convex type cylindrical support seat 3 is arranged in the outward convex type cylindrical support seat mounting hole 2, a second annular outward convex limiting step 6 is arranged on the outer circular side wall of the outward convex type cylindrical support seat 3, the second annular outward convex limiting step 6 is sleeved in the outward convex type cylindrical support seat mounting hole 2, and a vacuum electron beam welding seam 10 is arranged between a step annular vertical face 9 of the second annular outward convex limiting step 6 and the inner cavity side wall of the outward convex type cylindrical support seat mounting hole 2; the annular vertical surface 9 of the second annular outwards-protruding limiting step 6 is arranged on the outer side of the outer circular side wall 7 of the outer convex cylindrical supporting seat 3, and the height of the second annular outwards-protruding limiting step 6 is the same as the wall thickness of the curve conical section shell 1.
Be provided with first annular outside protruding spacing step 4 on the outer circular side wall of the protruding type cylinder supporting seat 3 of the annular outside protruding spacing step 6 below of second, be provided with step top surface curved surface 5 on the step top surface of first annular outside protruding spacing step 4, the curved surface shape of step top surface curved surface 5 is identical with the curved surface shape of the curve conic section casing in the 2 outsides of protruding type cylinder supporting seat mounting hole, the step facade 8 setting of the first annular outside protruding spacing step 4 is in the outside of the annular facade 9 of the step of the annular outside protruding spacing step 6 of second.
Claims (3)
1. A welding structure of a convex cylindrical supporting seat on a curved conical section shell comprises a curved conical section shell (1), wherein a convex cylindrical supporting seat mounting hole (2) is formed in the curved conical section shell (1), and a convex cylindrical supporting seat (3) is arranged in the convex cylindrical supporting seat mounting hole (2), and is characterized in that a second annular outward-protruding limiting step (6) is arranged on the outer circular side wall of the convex cylindrical supporting seat (3), the second annular outward-protruding limiting step (6) is sleeved in the convex cylindrical supporting seat mounting hole (2), and a vacuum electron beam welding seam (10) is arranged between an annular vertical surface (9) of the second annular outward-protruding limiting step (6) and the inner cavity side wall of the convex cylindrical supporting seat mounting hole (2); the annular vertical surface (9) of the second annular outwards-protruding limiting step (6) is arranged on the outer side of the outer circular side wall (7) of the externally-protruding cylindrical supporting seat (3), and the height of the second annular outwards-protruding limiting step (6) is the same as the wall thickness of the curve conical section shell (1).
2. The welding structure of the convex cylindrical supporting seat on the curved conical section shell according to claim 1, wherein a first annular convex limiting step (4) is arranged on the outer circular side wall of the convex cylindrical supporting seat (3) below a second annular convex limiting step (6), a curved surface (5) of the top surface of the first annular convex limiting step (4) is arranged on the top surface of the step, the curved surface shape of the curved surface (5) of the top surface of the step is identical to the curved surface shape of the curved conical section shell outside the convex cylindrical supporting seat mounting hole (2), and the vertical surface (8) of the first annular convex limiting step (4) is arranged outside the annular vertical surface (9) of the second annular convex limiting step (6).
3. The utility model provides a welding process of evagination type cylinder supporting seat on curve conic section casing, includes curve conic section casing (1), is provided with evagination type cylinder supporting seat mounting hole (2) on curve conic section casing (1), its characterized in that following step:
the method comprises the steps of firstly, processing a first annular outward-protruding limiting step (4) on the outer circular side wall of an outward-protruding type cylindrical supporting seat (3), arranging a step top surface curved surface (5) on the step top surface of the first annular outward-protruding limiting step (4), wherein the curved surface shape of the step top surface curved surface (5) is identical to the curved surface shape of a curve cone section shell on the outer side of an outward-protruding type cylindrical supporting seat mounting hole (2), processing a second annular outward-protruding limiting step (6) matched with the outward-protruding type cylindrical supporting seat mounting hole (2), arranging a step vertical surface annular vertical surface (9) of the second annular outward-protruding limiting step (6) on the outer circular side wall (7) of the outward-protruding type cylindrical supporting seat (3), arranging a step vertical surface (8) of the first annular outward-protruding limiting step (4) on the second annular outward-protruding limiting step The height of the second annular outwards-protruding limiting step (6) is the same as the wall thickness of the curve conical section shell (1) at the outer side of the step annular vertical surface (9) of the step (6);
secondly, firstly, placing the convex cylindrical supporting seat (3) processed in the first step into the curve conical section shell (1), and then sleeving the convex cylindrical supporting seat (3) on the convex cylindrical supporting seat mounting hole (2) from inside to outside, so that the step top surface curved surface (5) of the first annular outward convex limiting step (4) is attached to the inner cavity curved surface of the curve conical section shell outside the convex cylindrical supporting seat mounting hole (2);
thirdly, placing the curved conical section shell (1) into an electron beam vacuum welding chamber, and performing vacuum electron beam welding between a step annular vertical surface (9) of a second annular outwards-protruding limiting step (6) and the inner cavity side wall of the convex cylindrical supporting seat mounting hole (2) to form a vacuum electron beam welding seam (10);
and fourthly, detecting the vacuum electron beam welding seam (10) through a seam detection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911184875.0A CN110756978A (en) | 2019-11-27 | 2019-11-27 | Welding process of convex cylindrical support seat on curved conical section shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911184875.0A CN110756978A (en) | 2019-11-27 | 2019-11-27 | Welding process of convex cylindrical support seat on curved conical section shell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110756978A true CN110756978A (en) | 2020-02-07 |
Family
ID=69340019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911184875.0A Pending CN110756978A (en) | 2019-11-27 | 2019-11-27 | Welding process of convex cylindrical support seat on curved conical section shell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110756978A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112719556A (en) * | 2021-01-15 | 2021-04-30 | 山西汾西重工有限责任公司 | Hyperbolic conic section shell and forming method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101954536A (en) * | 2010-10-29 | 2011-01-26 | 成都四威高科技产业园有限公司 | Method for welding minor-diameter nozzle and aluminum alloy thin-walled structure |
| CN201841365U (en) * | 2010-10-29 | 2011-05-25 | 成都四威高科技产业园有限公司 | Small diameter tube nozzle vertically assembled with aluminium alloy thin-walled structure |
| CN108480824A (en) * | 2018-03-06 | 2018-09-04 | 兰州兰石重型装备股份有限公司 | Heat exchanger tube sheet and heat exchange pipe orifice overlap joint welding method |
| CN108746943A (en) * | 2018-06-06 | 2018-11-06 | 湖北天图桥梁技术研究有限公司 | H profile steel beam manufacturing method |
| WO2019080962A1 (en) * | 2017-10-24 | 2019-05-02 | Kelvion Holding Gmbh | Heat-exchanger element and method for producing a heat-exchanger element |
| CN211162373U (en) * | 2019-11-27 | 2020-08-04 | 山西汾西重工有限责任公司 | Welding structure of convex cylindrical supporting seat on curved conical section shell |
-
2019
- 2019-11-27 CN CN201911184875.0A patent/CN110756978A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101954536A (en) * | 2010-10-29 | 2011-01-26 | 成都四威高科技产业园有限公司 | Method for welding minor-diameter nozzle and aluminum alloy thin-walled structure |
| CN201841365U (en) * | 2010-10-29 | 2011-05-25 | 成都四威高科技产业园有限公司 | Small diameter tube nozzle vertically assembled with aluminium alloy thin-walled structure |
| WO2019080962A1 (en) * | 2017-10-24 | 2019-05-02 | Kelvion Holding Gmbh | Heat-exchanger element and method for producing a heat-exchanger element |
| CN108480824A (en) * | 2018-03-06 | 2018-09-04 | 兰州兰石重型装备股份有限公司 | Heat exchanger tube sheet and heat exchange pipe orifice overlap joint welding method |
| CN108746943A (en) * | 2018-06-06 | 2018-11-06 | 湖北天图桥梁技术研究有限公司 | H profile steel beam manufacturing method |
| CN211162373U (en) * | 2019-11-27 | 2020-08-04 | 山西汾西重工有限责任公司 | Welding structure of convex cylindrical supporting seat on curved conical section shell |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112719556A (en) * | 2021-01-15 | 2021-04-30 | 山西汾西重工有限责任公司 | Hyperbolic conic section shell and forming method |
| CN112719556B (en) * | 2021-01-15 | 2024-04-26 | 山西汾西重工有限责任公司 | Hyperbolic cone section shell and forming method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111037083B (en) | Vacuum electron beam welding method for aluminum alloy metal diaphragm storage tank | |
| CN201702524U (en) | Titanium alloy girth welding fixture | |
| CN206305623U (en) | A kind of thin cylinder crack laser is repaiied and covers anti-deformation fixture | |
| CN106141411B (en) | A kind of electron beam welding tool and welding procedure of aircraft cylinder and wing | |
| CN106735828B (en) | A kind of horizontal rifle electro-beam welding method of large size spherical shell side seam | |
| CN110732766B (en) | Method and device for controlling vacuum electron beam welding deformation of flame tube of aircraft engine | |
| CN211162373U (en) | Welding structure of convex cylindrical supporting seat on curved conical section shell | |
| CN114289938A (en) | Manned spherical pressure-resistant shell welding workbench and machining method thereof | |
| CN105195947A (en) | Group welding method and assembly fixture for inner barrel and outer barrel of connecting pipe with through hole support | |
| CN110756978A (en) | Welding process of convex cylindrical support seat on curved conical section shell | |
| CN110883540A (en) | Welding assembly process for thin-wall spray pipe shell of engine | |
| CN110238489A (en) | A kind of production of high-temperature heat-exchanging and welding procedure | |
| CN108907439B (en) | Electron beam welding processing method of titanium alloy thin-walled tube with tube nozzle | |
| CN105414782A (en) | Isolated layer surfacing method of dissimilar steel welding joint | |
| CN108031950B (en) | Circumferential welding method for thin-wall pipeline parts | |
| CN109483072B (en) | Welding method and tool for shield machine spiral machine seat | |
| CN105234531B (en) | A kind of carrier rocket ball fuel current divider welding equipment device and its assembling and welding process | |
| CN106239056B (en) | The big cambered surface spiral case liquid trap processing method of liquid rocket engine thrust chamber | |
| CN215745612U (en) | Large pipe fitting rounding device during flange plate welding | |
| CN117123903A (en) | Electron beam welding tool and method for annular metal diaphragm storage tank | |
| CN101670498A (en) | Groove process and tooling for restricting welding deformation of aluminum alloy thin-wall ball and flange | |
| CN103212953A (en) | Assembling and welding technology of middle shell cover, accessories and barrel of hydrogenation reactor | |
| CN109550809A (en) | A kind of weld assembly calibrating method and device | |
| JPH05177347A (en) | Production of steel frame core and device for the same | |
| CN209140171U (en) | Device is used in a kind of directly driven wind-powered rotor field spider assembly |
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 | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200207 |
|
| WD01 | Invention patent application deemed withdrawn after publication |