CN111570918A - Processing device and processing technology for flat-head tower top section and rotary tower body - Google Patents
Processing device and processing technology for flat-head tower top section and rotary tower body Download PDFInfo
- Publication number
- CN111570918A CN111570918A CN202010301892.4A CN202010301892A CN111570918A CN 111570918 A CN111570918 A CN 111570918A CN 202010301892 A CN202010301892 A CN 202010301892A CN 111570918 A CN111570918 A CN 111570918A
- Authority
- CN
- China
- Prior art keywords
- top section
- sides
- machining
- lug
- tower body
- 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
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D79/00—Methods, machines, or devices not covered elsewhere, for working metal by removal of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention belongs to the field of manufacturing of tower cranes and provides a device and a process for processing a flat-head tower top section and a rotary tower body. The process eliminates the influence of welding deformation on the deformation of the lug plate and the hole position degree, and improves the installation precision and interchangeability of the top section and the rotary tower body because the processing device adopts numerical control two sides to process simultaneously, and the coaxiality of connecting holes on the two sides and the verticality of the connecting holes and the surface of the lug plate can also be effectively ensured.
Description
Technical Field
The invention belongs to the field of manufacturing of tower cranes, and particularly relates to a device and a process for machining a flat-head tower top section and a rotary tower body.
Background
The tower crane is a common hoisting device in the building construction industry, and the flat-head tower is one of the tower cranes. The flat-head tower comprises a top section for connecting the crane boom and the balance arm, and the lower part of the top section is connected with the rotary tower body. Therefore, the manufacturing precision of the top section and the rotary tower body can directly influence the assembly of the top section and the rotary tower body, the assembly of the rotary tower body and the upper support, and particularly the size precision and the position degree of the hole at the connecting lug plate of the top section and the rotary tower body directly influence the installation of the flat-head tower crane.
At present, the top section and the rotary tower body are manufactured by processing connecting holes in single parts of lug plates into design sizes before welding, and then performing matched welding on the top section and the rotary tower body connecting lug plate assembling pin shaft or performing matched welding on the lug plates by using a positioning tool. However, these engaging lug plates have a large thickness, a large welding amount, a large heat input amount, and a large welding deformation. The following problems tend to arise:
a. the lug plates deform after welding, the lug plates bend outwards or inwards, the coaxiality and the position degree of holes machined in advance in the single piece change, and the top section and the rotary tower body cannot be installed.
b. If the ear plate is corrected after welding, whether the ear plate is corrected in a mechanical mode or a heating mode, the weld joint and the heat affected zone of the ear plate have large residual stress, the stress of the whole structure is influenced, and certain hidden danger is brought to the use safety of the tower crane.
c. If the hole is polished after welding, the roundness of the hole and the fit between the hole and the pin shaft are unpredictably affected.
Disclosure of Invention
The invention aims to overcome the defects of the existing processing technology and provides a processing device and a processing technology for a flat-head tower top section and a rotary tower body.
The object of the invention is achieved by the following technical measures.
A processing device for a flat-head tower top section and a rotary tower body comprises a workbench for installing and fixing workpieces, in order to ensure the effective installation of a main body structure of the top section, meanwhile, in order to save cost, the workbench is divided into a fixed workbench and an auxiliary workbench, upright posts are symmetrically arranged along two sides of the workbench, a main shaft is fixed on the upright post and can move up and down along the upright post, a cutter is arranged at the end part of the main shaft close to the side of the workbench, the upright posts at two sides are respectively fixed on the bases at two sides and can horizontally move along the length direction of the bases, in order to ensure the position precision among the bases, the upright post and the workbench and the stability of the bases, the connecting seat is arranged between the base and the workbench, the stand column is driven by the horizontal driving device, the main shafts on the two sides are driven by the upper and lower driving devices, and meanwhile, the main shafts perform front and back feeding motion through the feeding driving device so as to meet the requirement of hole processing.
In the technical scheme, the horizontal driving device, the vertical driving device and the feeding driving device are controlled by the numerical control system, the vertical, horizontal and feeding motions of the main shafts are accurately finished by the numerical control system, and meanwhile, the main shafts on two sides can be simultaneously machined to ensure the coaxiality of the connecting holes on the lug plates on the two sides, and the two main shafts can also be separately machined to improve the machining efficiency.
The invention also provides a processing technology of the flat-head tower top section and the rotary tower body, which comprises the following steps:
(1) processing the connecting hole on the lug plate to D1-10mm, wherein D1 is the diameter of a finished product of the connecting hole on the lug plate, and 10mm is the processing allowance;
(2) fixing the lug plate by using an assembly welding tool, and fixing the lug plate to the corresponding position of the top section main body structure in a spot welding manner to ensure that the position of the lug plate on the top section main body structure meets the design requirement; welding seams between the lug plates and the top section main body structure after spot welding and fixing; in the welding process, the lug plates are connected and fixed by the assembly welding tool all the time;
(3) after welding is finished and the workpiece is cooled, the connection between the assembly welding tool and the lug plate is removed;
(4) heating or mechanically correcting the lug plates which deform after welding is completed to enable the flatness and the distance between the lug plates on the two sides to meet the design requirements;
(5) hoisting the top section main body structure welded with the lug plates to a workbench of a machining device, after correction, utilizing front-end cutters of the main shafts on the two sides to simultaneously machine the connecting holes on the lug plates on the two sides, wherein in the machining process, the main shafts on the two sides are controlled by a numerical control system, the main shafts on the two sides simultaneously work and simultaneously move to ensure that the connecting holes on the lug plates are coaxial, the position degree meets the design requirement, and the machining is completed until all the connecting holes are machined to the design diameter D1;
(6) and (3) machining the rotary tower body matched with the top section in the same machining mode as the steps (1) - (5), wherein in the step (5), the rotary tower body is clamped on a workbench of a machining device, and machining of all connecting holes in the upper lug plate and the lower lug plate can be completed in one-time clamping, so that the precision of all the connecting holes of the rotary tower body and the position size of each connecting hole meet the design requirements, and the rotary tower body has reliable interchangeability.
In the technical scheme, the assembly welding tool comprises a tool main body structure and an ear plate positioning seat, the ear plate positioning seat is fixed on the tool main body structure according to the position requirement of the ear plate on the top section main body structure, and the ear plate positioning seat is provided with a fixing hole and is fixedly connected with a connecting hole in the ear plate through a bolt.
The processing device and the processing technology have the beneficial effects that: reserve certain machining allowance through the connecting hole on with the otic placode before welding, the machining allowance that stays in this embodiment is 10mm, and the connecting hole and the assembly welding frock of recycling processing are fixed a position, weld the otic placode to the top festival major structure on, treat to eliminate welding deformation back, recycle processingequipment and carry out secondary operation to the connecting hole, until aperture and position size all satisfy the designing requirement. The process eliminates the influence of welding deformation on the deformation of the lug plate and the position degree of the holes, and because the two sides of the numerical control processing device are simultaneously processed, the coaxiality of the connecting holes at the two sides and the verticality of the connecting holes and the surface of the lug plate can be effectively ensured, and the mounting precision and the interchangeability of the top section and the rotary tower body are improved.
Drawings
Fig. 1 is a front view of a top bay structure.
Fig. 2 is a cross-sectional view a-a of fig. 1.
Wherein: 1. a top section main body structure; 2. an ear plate; d1 is the design diameter of the attachment hole on the ear plate.
Fig. 3 is a front view of the structure of the revolving tower body.
Fig. 4 is a top view of the rotating tower structure.
Wherein: 5. a main body structure of the rotary tower body; 6. an upper ear plate of the rotary tower body; 7. a lug plate at the lower part of the rotary tower body; d2 is the design diameter of the connecting hole on the upper ear plate; d3 is the design diameter of the attachment hole in the lower ear plate.
Fig. 5 is a schematic view of an assembly welding tool.
Wherein: 3. a tool main body structure; 4. ear plate positioning seat.
FIG. 6 is a front view of the processing apparatus of the present invention.
FIG. 7 is a top view of the processing apparatus of the present invention.
Wherein: 8. fixing a workbench; 9. an auxiliary worktable; 10. a main shaft A; 11. a main shaft B; 12. a base; 13. a connecting seat; 14. a column; 15. an up-down driving device; 16. a horizontal driving device; 17. a feed drive device.
Detailed Description
The present invention will be further described below in order to make the technical means, the creation features and the objects of the present invention easy to understand.
As shown in fig. 6 and 7, the present embodiment provides a processing apparatus for a flat-top tower section and a revolving tower body, which includes a workbench for installing and fixing a workpiece, in order to ensure effective installation of a top section main structure 1 and save cost, the workbench is divided into two parts, namely a fixed workbench 8 and an auxiliary workbench 9, upright columns 14 are symmetrically arranged along two sides of the workbench, a main shaft is fixed on the upright columns 14, the main shaft can move up and down along the upright columns 14, a cutter is arranged at an end portion of the main shaft close to the workbench, the upright columns 14 on two sides are respectively fixed on bases 12 on two sides and can horizontally move along a length direction of the bases, in order to ensure position accuracy between the bases 12, the upright columns 14 and the workbench and stability of the bases 12, a connecting seat 13 is arranged between the bases 12 and the workbench, the upright columns 14 are driven by a horizontal driving device 16, the main shafts on two, meanwhile, the main shaft carries out front and back feeding movement through the feeding driving device 17 so as to meet the machining of holes.
In the above technical solution, the horizontal driving device 16, the vertical driving device 15 and the feed driving device 17 are controlled by a numerical control system, and the vertical, horizontal and feed movements of the spindles are accurately completed by the numerical control system, and the spindles on both sides can be simultaneously processed to ensure the coaxiality of the connecting holes on the ear plates on both sides, and can also be separately processed to improve the processing efficiency.
The embodiment also provides a processing technology of the flat-head tower top section and the rotary tower body, which comprises the following steps:
(1) processing the connecting hole on the lug plate 2 to D1-10mm, wherein D1 is the finished diameter of the connecting hole on the lug plate 2, and 10mm is the processing allowance;
(2) fixing the lug plate 2 by using a mounting and welding tool, and fixing the lug plate 2 to the corresponding position of the top section main body structure 1 by spot welding to ensure that the positions L1, L2, L3 and H1 of the lug plate 2 on the top section main body structure 1 meet the design requirements; welding seams between the lug plates 2 and the top section main body structure 1 after spot welding and fixing; the ear plates 2 need to be connected and fixed by the assembly welding tool all the time in the welding process;
(3) after welding is finished and the workpiece is cooled, the connection between the assembly welding tool and the lug plate 2 is removed;
(4) heating or mechanically correcting the lug plates 2 which are deformed after welding is completed, so that the flatness and the distances W1, W2 and W3 between the lug plates 2 on two sides meet the design requirements;
(5) the top section main body structure 1 welded with the lug plates 2 is hoisted to a workbench of a machining device, after correction, connecting holes in the lug plates 2 on two sides are machined simultaneously by using front-end cutters of main shafts on two sides, in the machining process, the main shafts on two sides are controlled by a numerical control system, the main shafts on two sides work simultaneously and move simultaneously to ensure that the connecting holes in the lug plates 2 are coaxial, the position degree meets the design requirement, and the machining is completed until all the connecting holes are machined to the design diameter D1;
(6) and (3) machining the rotary tower body matched with the top section in the same machining mode as the steps (1) - (5), wherein in the step (5), the rotary tower body is clamped on a workbench of a machining device according to the direction shown in the figure 3, and all connecting holes on the upper lug plate and the lower lug plate can be machined in one-time clamping, so that the precision of all connecting holes D2 and D3 of the rotary tower body is effectively ensured, and the position sizes L1', L2', L3', H1', H2 'and H3' of all the connecting holes meet the design requirements, and the rotary tower body has reliable interchangeability.
In the above embodiment, as shown in fig. 5, the assembly welding tooling includes a tooling main body structure 3 and an ear plate positioning seat 4, the ear plate positioning seat 4 is fixed on the tooling main body structure 3 according to the position requirement of the ear plate on the top section main body structure 1, and the ear plate positioning seat 4 is provided with a fixing hole and is fixedly connected with a connecting hole on the ear plate through a bolt.
The processing device and the processing technology have the beneficial effects that: reserve certain machining allowance through the connecting hole on 2 otic placodes before welding, the machining allowance that stays in this embodiment is 10mm, and the connecting hole and the assembly welding frock of recycling processing are fixed a position, weld 2 otic placodes to the apical node major structure 1 on, wait to eliminate welding deformation after, recycle processingequipment and carry out secondary operation to the connecting hole, until aperture and position size all satisfy the designing requirement. The process eliminates the influence of welding deformation on the deformation of the lug plate and the position degree of the holes, and because the two sides of the numerical control processing device are simultaneously processed, the coaxiality of the connecting holes at the two sides and the verticality of the connecting holes and the surface of the lug plate 2 can be effectively ensured, and the mounting precision and the interchangeability of the top section and the rotary tower body are improved.
Details not described in the present specification belong to the prior art known to those skilled in the art.
The above-mentioned processing technology is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the scope of the present invention. The processing device is not limited to the structure, and any device or apparatus capable of performing the above processing mode is within the protection scope of the present invention.
Claims (4)
1. The utility model provides a processingequipment of crew cut top of tower festival and gyration body of the tower which characterized in that: including the workstation that is used for installing fixed work piece, the workstation divide into fixed workstation and auxiliary workbench, has arranged the stand along workstation bilateral symmetry, is fixed with the main shaft on the stand, and the main shaft can be followed the stand and reciprocated, the tip that the main shaft leaned on the workstation side is equipped with the cutter, and both sides stand is fixed respectively on both sides base and can be followed base length direction horizontal migration, the stand passes through the drive of horizontal drive device, and both sides main shaft is through upper and lower drive arrangement drive, and the main shaft carries out front and back feed motion through feeding drive arrangement simultaneously.
2. The apparatus for processing a truncated turret crown and a turret body as claimed in claim 1, wherein: the horizontal driving device, the vertical driving device and the feeding driving device are controlled by the numerical control system, the vertical, horizontal and feeding motions of the main shafts are accurately finished by the numerical control system, and meanwhile, the main shafts on two sides can be simultaneously machined to ensure the coaxiality of the connecting holes on the lug plates on the two sides, and the two main shafts can also be separately machined to improve the machining efficiency.
3. A processing technology of a flat-head tower top section and a rotary tower body is characterized by comprising the following steps:
(1) processing the connecting hole on the lug plate to D1-10mm, wherein D1 is the diameter of a finished product of the connecting hole on the lug plate, and 10mm is the processing allowance;
(2) fixing the lug plate by using an assembly welding tool, and fixing the lug plate to the corresponding position of the top section main body structure in a spot welding manner to ensure that the position of the lug plate on the top section main body structure meets the design requirement; welding seams between the lug plates and the top section main body structure after spot welding and fixing; in the welding process, the lug plates are connected and fixed by the assembly welding tool all the time;
(3) after welding is finished and the workpiece is cooled, the connection between the assembly welding tool and the lug plate is removed;
(4) heating or mechanically correcting the lug plates which deform after welding is completed to enable the flatness and the distance between the lug plates on the two sides to meet the design requirements;
(5) hoisting the top section main body structure welded with the lug plates to a workbench of a machining device, after correction, utilizing front-end cutters of the main shafts on the two sides to simultaneously machine the connecting holes on the lug plates on the two sides, wherein in the machining process, the main shafts on the two sides are controlled by a numerical control system, the main shafts on the two sides simultaneously work and simultaneously move to ensure that the connecting holes on the lug plates are coaxial, the position degree meets the design requirement, and the machining is completed until all the connecting holes are machined to the design diameter D1;
(6) and (3) machining the rotary tower body matched with the top section in the same machining mode as the steps (1) - (5), wherein in the step (5), the rotary tower body is clamped on a workbench of a machining device, and machining of all connecting holes in the upper lug plate and the lower lug plate can be completed in one-time clamping, so that the precision of all the connecting holes of the rotary tower body is effectively guaranteed, the position size' of each connecting hole meets the design requirement, and the rotary tower body has reliable interchangeability.
4. The process for machining the flat-head tower top section and the rotary tower body as claimed in claim 3, wherein the process comprises the following steps: the assembly welding tool comprises a tool main body structure and an ear plate positioning seat, the ear plate positioning seat is fixed on the tool main body structure according to the position requirement of the ear plate on the top section main body structure, and a fixing hole is formed in the ear plate positioning seat and is fixedly connected with a connecting hole in the ear plate through a bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010301892.4A CN111570918B (en) | 2020-04-16 | 2020-04-16 | Processing device and processing technology for flat-head tower top section and rotary tower body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010301892.4A CN111570918B (en) | 2020-04-16 | 2020-04-16 | Processing device and processing technology for flat-head tower top section and rotary tower body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111570918A true CN111570918A (en) | 2020-08-25 |
| CN111570918B CN111570918B (en) | 2023-03-31 |
Family
ID=72089863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010301892.4A Active CN111570918B (en) | 2020-04-16 | 2020-04-16 | Processing device and processing technology for flat-head tower top section and rotary tower body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111570918B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103056412A (en) * | 2013-01-29 | 2013-04-24 | 李耀稳 | Numerical control drilling tool with multi-spindle and bi-directional processing function |
| CN203900777U (en) * | 2014-05-16 | 2014-10-29 | 山东大汉建设机械有限公司 | Assembling and welding positioning device for slewing tower body single sheet of tower crane |
| CN104625452A (en) * | 2014-12-31 | 2015-05-20 | 广州文冲船厂有限责任公司 | Installation technology for dredger square mud doors |
| KR20180023558A (en) * | 2016-08-26 | 2018-03-07 | 주식회사 금강 | A ball-joint stud cross hole processing equipment and a ball-joint stud cross hole processing using the same |
| CN207239210U (en) * | 2017-08-31 | 2018-04-17 | 南京肯迈得机床制造有限公司 | Valve plate full-automatic processing lathe |
| CN207735623U (en) * | 2017-12-05 | 2018-08-17 | 安徽易恒机械有限公司 | A kind of bent axle twin tip drill of overhead tool magazine attacks center |
-
2020
- 2020-04-16 CN CN202010301892.4A patent/CN111570918B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103056412A (en) * | 2013-01-29 | 2013-04-24 | 李耀稳 | Numerical control drilling tool with multi-spindle and bi-directional processing function |
| CN203900777U (en) * | 2014-05-16 | 2014-10-29 | 山东大汉建设机械有限公司 | Assembling and welding positioning device for slewing tower body single sheet of tower crane |
| CN104625452A (en) * | 2014-12-31 | 2015-05-20 | 广州文冲船厂有限责任公司 | Installation technology for dredger square mud doors |
| KR20180023558A (en) * | 2016-08-26 | 2018-03-07 | 주식회사 금강 | A ball-joint stud cross hole processing equipment and a ball-joint stud cross hole processing using the same |
| CN207239210U (en) * | 2017-08-31 | 2018-04-17 | 南京肯迈得机床制造有限公司 | Valve plate full-automatic processing lathe |
| CN207735623U (en) * | 2017-12-05 | 2018-08-17 | 安徽易恒机械有限公司 | A kind of bent axle twin tip drill of overhead tool magazine attacks center |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111570918B (en) | 2023-03-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102145451B1 (en) | Jig apparatus | |
| CN108161466B (en) | Plasma cutting and drilling system | |
| CN206780397U (en) | Drilling robot | |
| CN104589004B (en) | Master subtracts locator method of manufacturing technology | |
| CN101585156B (en) | Eccentricity adjusting method and device for vertical numerically controlled grinder to process eccentric orifice | |
| CN209578785U (en) | A kind of process equipment for the oblique pole hole of wind-powered electricity generation rotor rim | |
| CN203227953U (en) | Automatic production device for disc type scaffolds | |
| CN101391358B (en) | Method for processing welding frame device using bolt, pun bush as positioning reference | |
| CN111570918B (en) | Processing device and processing technology for flat-head tower top section and rotary tower body | |
| CN112658720A (en) | Positioning tool and positioning method for quickly clamping inner cavities of left and right side beams | |
| CN208147322U (en) | Multi-functional compound gantry machining center and system | |
| CN203853604U (en) | Cutting and positioning device of milling machine module | |
| CN203459860U (en) | Assembly and welding device for excavator lower frame | |
| CN206597940U (en) | A kind of Combined drill die craft equipment for being used to drill in housing connection member | |
| CN111451651B (en) | Engine leather cup cutting clamp and cutting method | |
| CN113909911A (en) | Construction elevator cage main channel steel machining equipment and machining process | |
| CN207563998U (en) | A kind of experiment automatic welding platform | |
| CN110614513A (en) | Processing frock of waist type hole and drilling through-hole are milled to coupling | |
| CN204603640U (en) | Air-spring type full loading carriage back segment skeleton welding fixture special | |
| CN219792313U (en) | Detachable double-bearing-seat structure for pulley support of large hoisting machine | |
| CN110773826A (en) | Large-scale double ox head spark machine | |
| CN109317991A (en) | A kind of anti-pollution horizontal Machining centers that multi-angle processing can be carried out to workpiece | |
| CN205074803U (en) | With falling to ground tooling of boring and milling machine processing hoist crossbeam | |
| CN212704460U (en) | Novel side-standing dual-purpose numerical control high-speed drilling machine | |
| CN212824277U (en) | Special numerical control machining machine tool for construction elevator cage |
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 | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A processing device and process for flat head tower top section and rotating tower body Effective date of registration: 20230714 Granted publication date: 20230331 Pledgee: China Construction Bank Corporation Jingzhou Longshan Temple Sub-branch Pledgor: JOINHAND CONSTRUCTION MACHINERY Co.,Ltd. Registration number: Y2023980048462 |