CN110227780A - A kind of novel forging roll bearing arrangement - Google Patents
A kind of novel forging roll bearing arrangement Download PDFInfo
- Publication number
- CN110227780A CN110227780A CN201910536697.7A CN201910536697A CN110227780A CN 110227780 A CN110227780 A CN 110227780A CN 201910536697 A CN201910536697 A CN 201910536697A CN 110227780 A CN110227780 A CN 110227780A
- Authority
- CN
- China
- Prior art keywords
- forging
- circulation pipe
- circular tube
- roller
- catch basin
- 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
- 238000005242 forging Methods 0.000 title claims abstract description 81
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000010080 roll forging Methods 0.000 claims abstract description 18
- 238000001816 cooling Methods 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 abstract description 14
- 239000012634 fragment Substances 0.000 abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 8
- 206010053615 Thermal burn Diseases 0.000 abstract description 3
- 239000000498 cooling water Substances 0.000 abstract description 3
- 230000017525 heat dissipation Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- BVPWJMCABCPUQY-UHFFFAOYSA-N 4-amino-5-chloro-2-methoxy-N-[1-(phenylmethyl)-4-piperidinyl]benzamide Chemical compound COC1=CC(N)=C(Cl)C=C1C(=O)NC1CCN(CC=2C=CC=CC=2)CC1 BVPWJMCABCPUQY-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J9/00—Forging presses
- B21J9/02—Special design or construction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K29/00—Arrangements for heating or cooling during processing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The present invention relates to mechanical equipment technical field, organic frame is fixedly mounted in specially a kind of novel forging roll bearing arrangement, including pedestal, rack, lower forging roller, upper forging roller and roll forging die enabling, the upper surface two sides vertical direction of pedestal；It has the beneficial effect that by the way that upper circular tube is arranged in the top of upper forging roller, lower circulation pipe is arranged in the lower section of lower forging roller, cooling water is passed through in circulation pipe, when roll forging die enabling turns between circulation pipe, heat exchange is carried out with the cryogenic gas around circulation pipe, is radiated, secondly blower is installed above upper circular tube, air circulation, auxiliary heat dissipation can be enhanced；By installing catch basin on pedestal, the molten metal fallen when forging surface is by pressure falls into the water, and is frozen into metal fragment, avoids because being dropped on pedestal scald staff of splashing；Filter device is installed in catch basin, avoids causing water drainage hole plug when the metal fragment in catch basin is excessive, secondly the collection to metal fragment is also facilitated to clear up.
Description
Technical field
The present invention relates to mechanical equipment correlative technology field, specially a kind of novel forging roll bearing arrangement.
Background technique
Forging roll is mainly used for the blocking of forging, can be used for finish-forging forming, master-plan is using double upright supports machines
Structure is rotated with two upper and lower forging rollers of rack support.It can be installed among upper and lower forging roller and overpay fan-shaped roll forging die enabling,
Make workpiece rolling formation.Forge roller center away from forging roller angle-adjusting mechanism it is adjustable it is upper and lower forging roller center away from forging roller die
The dislocation angle of tool, easily to just with adjustment die clearance and angle.Existing forging roll bearing arrangement is lacked there are following
Point:
1. forging roll, since forging is high-temperature metal, is directly contacted with roll forging die enabling, is made when carrying out roll-in to forging
It is excessively high at roll forging die enabling temperature；
2. forging surface can generate melted debris because of the power that is squeezed, and melted debris is directly fallen when carrying out roll-in to forging
It on bottom plate, easily adheres on bottom plate, or splashes and scald staff；
3. being collected using catch basin to molten metal clast, it is be easy to cause water drainage hole plug in draining, for this purpose,
The present invention proposes that a kind of novel forging roll bearing arrangement is used to solve the above problems.
Summary of the invention
It is mentioned above in the background art to solve the purpose of the present invention is to provide a kind of novel forging roll bearing arrangement
Problem.
To achieve the above object, the invention provides the following technical scheme: a kind of novel forging roll bearing arrangement, including bottom
Seat, rack, lower forging roller, upper forging roller and roll forging die enabling, the upper surface two sides vertical direction fixed installation organic frame of the pedestal, two
It is provided with lower forging roller between the group rack, and is located above lower forging roller between two groups of racks and is provided with forging roller, under described
The both ends for forging roller and the outer surface of two groups of racks are rotatablely connected, and the both ends of upper forging roller and the outer surface of two groups of racks are rotatablely connected,
The outer surface of the lower forging roller and upper forging roller is fixedly installed with roll forging die enabling, and the upper surface slide of the pedestal, which is equipped with, catchments
Slot, and the inside of catch basin is fixedly installed with filter device, the leading flank of the catch basin offers discharge outlet, and discharge outlet position
It is provided with upper circular tube above the lower section of filter device, the upper forging roller, is provided with lower circulation pipe, institute below lower forging roller
It states and is provided with connecting tube between upper circular tube and lower circulation pipe, and the end at the both ends of connecting tube and upper circular tube and lower circulation pipe
Be fixedly connected, upper circular tube, lower circulation pipe and connecting tube form cooling back installation, the upper circular tube and lower circulation pipe with
The outer surface of rack is fixedly connected.
Preferably, the upper surface of the pedestal, which is located at below lower forging roller, offers rectangular recess, the front end of rectangular recess
For openning shape, catch basin is located at the inside of rectangular recess, and the height of catch basin is higher than the depth of rectangular recess.
Preferably, the left and right sides inner wall of the rectangular recess offers T connected in star, and the front end of T connected in star is openning shape,
The left and right sides outer surface of catch basin is fixedly installed with T shape sliding rail, and T shape sliding rail is located at the inside of T connected in star, and catch basin passes through
T shape sliding rail is slidably connected with rectangular recess.
Preferably, the filter device is rectangular frame structure of the upper end in opening, and the lower surface of filter device is grid
Shape, the left and right sides wall upper surface of filter device are fixedly installed with hook, and the left and right sides inner wall of catch basin is fixedly installed with extension
Ring, and hang in link.
Preferably, the upper circular tube is identical as lower circulation tube shape, and upper circular tube and lower circulation pipe are and forge rolling die
There are spacing, upper circular tube and the lower serpentine-like arrangements of circulation pipe for the outer surface of tool.
Preferably, the outer surface of the rack corresponds to upper circular tube and the position of lower circulation pipe is fixedly installed with horizontal branch
Frame, and the end of horizontal bracket is fixedly connected with semicircular ring, upper circular tube is located in semicircular ring, and the outer surface of upper circular tube with
The contact of semicircular ring inner wall.
Preferably, the horizontal bracket upper surface above the upper forging roller is fixedly installed with one group of blower, semicircular ring up and down
Surface offers threaded hole, and bolt is bolted in threaded hole, and upper circular tube is fixedly connected by bolt with horizontal bracket.
Compared with prior art, the beneficial effects of the present invention are:
1. lower circulation pipe is arranged in the lower section of lower forging roller, in circulation pipe by the way that upper circular tube is arranged in the top of upper forging roller
It is passed through cooling water, when roll forging die enabling turns between circulation pipe, heat exchange is carried out with the cryogenic gas around circulation pipe, carries out
Secondly heat dissipation installs blower above upper circular tube, air circulation, auxiliary heat dissipation can be enhanced；
2. by installing catch basin on pedestal, the molten metal fallen when forging surface is by pressure falls into the water, solidification
At metal fragment, avoid because being dropped on pedestal scald staff of splashing；
3 install filter device in catch basin, avoid causing water drainage hole plug when the metal fragment in catch basin is excessive,
It is secondary that the collection to metal fragment is also facilitated to clear up.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is cooling-cycle device perspective view of the invention；
Fig. 3 is the mounting structure schematic diagram of pedestal of the present invention and catch basin.
In figure: 1 pedestal, 2 racks, 3 lower forging rollers, to forge roller, 5 roll forging die enablings, 6 rectangular recess, 7 catch basins, 8T shape on 4 recessed
Slot, 9T shape sliding rail, 10 upper circular tubes, 11 lower circulation pipes, 12 connecting tubes, 13 horizontal brackets, 14 blowers, 15 discharge outlet, 16 filterings
Device, 17 links.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
It please refers to Fig.1 to Fig.3, the present invention provides a kind of technical solution: a kind of novel forging roll bearing arrangement, such as Fig. 1 institute
Show, including pedestal 1, rack 2, lower forging roller 3, upper forging roller 4 and roll forging die enabling 5, the fixed peace of the upper surface two sides vertical direction of pedestal 1
Equipped with rack 2, lower forging roller 3 is provided between two groups of racks 2, and the top for being located at lower forging roller 3 between two groups of racks 2 is provided with
Roller 4 is forged, the both ends of lower forging roller 3 and the outer surface of two groups of racks 2 are rotatablely connected, the both ends of upper forging roller 4 and the appearance of two groups of racks 2
The outer surface of face rotation connection, lower forging roller 3 and upper forging roller 4 is fixedly installed with roll forging die enabling 5, the upper surface slide peace of pedestal 1
Equipped with catch basin 7,
As shown in figure 3, the lower section that the upper surface of pedestal 1 is located at lower forging roller 3 offers rectangular recess 6, before rectangular recess 6
End is openning shape, and catch basin 7 is located at the inside of rectangular recess 6, and the height of catch basin 7 is higher than the depth of rectangular recess 6, rectangle
The left and right sides inner wall of groove 6 offers T connected in star 8, and the front end of T connected in star 8 is openning shape, outside the left and right sides of catch basin 7
Surface is fixedly installed with T shape sliding rail 9, and T shape sliding rail 9 is located at the inside of T connected in star 8, and catch basin 7 passes through T shape sliding rail 9 and rectangle
Groove 6 is slidably connected, and the interior of catch basin 7 is provided with filter device 16, and filter device 16 is rectangular frame of the upper end in opening
Structure, the lower surface of filter device 16 be it is latticed, the left and right sides wall upper surface of filter device 16 is fixedly installed with hook, collects
The left and right sides inner wall of sink 7 is fixedly installed with link 17, and hangs in link 17, and filter device 16 passes through hook and collection
Sink 7 is fixedly connected, and the leading flank of catch basin 7 offers discharge outlet 15, and discharge outlet 15 is located at the lower section of filter device 16, row
Sealing plug is plugged in the mouth of a river 15.
As illustrated in fig. 1 and 2, the top of upper forging roller 4 is provided with upper circular tube 10, and the lower section of lower forging roller 3 is provided with lower circulation
Pipe 11, upper circular tube 10 is identical as lower 11 shape of circulation pipe, and upper circular tube 10 and lower circulation pipe 11 are outer with roll forging die enabling 5
Surface is arranged between upper circular tube 10 and lower circulation pipe 11 there are spacing, upper circular tube 10 and the serpentine-like arrangement of lower circulation pipe 11
There is connecting tube 12, and the both ends of connecting tube 12 are fixedly connected with the end of upper circular tube 10 and lower circulation pipe 11, upper circular tube 10,
Lower circulation pipe 11 and connecting tube 12 form cooling back installation, the water inlet end of upper circular tube 10 and the fixed company of external pumping installations
It connects, the position that the outer surface of rack 2 corresponds to upper circular tube 10 and lower circulation pipe 11, which is bolted, is equipped with horizontal bracket
13, and the end of horizontal bracket 13 is welded with semicircular ring, upper circular tube 10 is located in semicircular ring, and the outer surface of upper circular tube 10
Contacted with semicircular ring inner wall, the upper and lower surface of semicircular ring offers threaded hole, be bolted with bolt in threaded hole, upper circular tube 10 with
Lower circulation pipe 11 is fixedly connected by bolt with horizontal bracket 13, upper circular tube 10 and appearance of the lower circulation pipe 11 with rack 2
Face is fixedly connected, and 13 upper surface of horizontal bracket of upper 4 top of forging roller is fixedly installed with one group of blower 14, blower 14 and external power supply
It is electrically connected.
Working principle: above forging roller 4 and lower forging roller 3 rotates, and drives the roll forging die enabling 5 of the two outer surface to rotate, two groups of roll forging
Mold 5 is squeezed close to forging, and roll forging die enabling 5 continues to turn to upper end after contacting with forging, is passed through cooling in upper circular tube 10
Water, cooling water, which is circulated, flows to the lower finally outflow of circulation pipe 11 by connecting tube 12, starts blower 14, blower 14, which is blown, to follow
Cold air around endless tube 10 makes the roll forging die enabling 5 of itself and upper forging 4 outer surface of roller carry out heat exchange, and forging is because of the power surface that is squeezed
Molten metal be dropped in catch basin 7, the water that lower circulation pipe 11 is discharged can flow in catch basin 7, molten metal preliminary condensation
Gu filter device 16, into filtering, avoids resulting in blockage to discharge outlet 15 to metal fragment at metal fragment.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (7)
1. a kind of novel forging roll bearing arrangement, including pedestal (1), rack (2), lower forging roller (3), upper forging roller (4) and forge rolling die
Have (5), it is characterised in that: organic frame (2) are fixedly mounted in the upper surface two sides vertical direction of the pedestal (1), machine described in two groups
It is provided with lower forging roller (3) between frame (2), and is located above lower forging roller (3) between two groups of racks (2) and is provided with forging roller (4),
The both ends of lower forging roller (3) and the outer surface of two groups of racks (2) are rotatablely connected, the both ends of upper forging roller (4) and two groups of racks (2)
Outer surface rotation connection, it is described it is lower forging roller (3) and it is upper forge roller (4) outer surface be fixedly installed with roll forging die enabling (5), it is described
The upper surface slide of pedestal (1) is equipped with catch basin (7), and the inside of catch basin (7) is fixedly installed with filter device (16), institute
The leading flank for stating catch basin (7) offers discharge outlet (15), and discharge outlet (15) is located at the lower section of filter device (16), it is described on
It is provided with upper circular tube (10), is provided with lower circulation pipe (11) below lower forging roller (3), the upper circulation above forging roller (4)
Be provided with connecting tube (12) between pipe (10) and lower circulation pipe (11), and the both ends of connecting tube (12) and upper circular tube (10) and under
The end of circulation pipe (11) is fixedly connected, upper circular tube (10), lower circulation pipe (11) and connecting tube (12) composition circulating cooling dress
It sets, the upper circular tube (10) is fixedly connected with the outer surface of rack (2) with lower circulation pipe (11).
2. a kind of novel forging roll bearing arrangement according to claim 1, it is characterised in that: the upper table of the pedestal (1)
Face, which is located at below lower forging roller (3), to be offered rectangular recess (6), and the front end of rectangular recess (6) is openning shape, catch basin (7) position
In the inside of rectangular recess (6), and the height of catch basin (7) is higher than the depth of rectangular recess (6).
3. a kind of novel forging roll bearing arrangement according to claim 2, it is characterised in that: the rectangular recess (6)
Left and right sides inner wall offers T connected in star (8), and the front end of T connected in star (8) is openning shape, the left and right sides appearance of catch basin (7)
Face is fixedly installed with T shape sliding rail (9), and T shape sliding rail (9) is located at the inside of T connected in star (8), and catch basin (7) passes through T shape sliding rail
(9) it is slidably connected with rectangular recess (6).
4. a kind of novel forging roll bearing arrangement according to claim 1, it is characterised in that: the filter device (16) is
In the rectangular frame structure of opening, the lower surface of filter device (16) is latticed, the left and right sides of filter device (16) for upper end
Wall upper surface is fixedly installed with hook, and the left and right sides inner wall of catch basin (7) is fixedly installed with link (17), and hangs over extension
In ring (17).
5. a kind of novel forging roll bearing arrangement according to claim 1, it is characterised in that: the upper circular tube (10) with
Lower circulation pipe (11) shape is identical, and upper circular tube (10) and lower circulation pipe (11) exist with the outer surface of roll forging die enabling (5)
Spacing, upper circular tube (10) and lower circulation pipe (11) serpentine-like arrangement.
6. a kind of novel forging roll bearing arrangement according to claim 1, it is characterised in that: the appearance of the rack (2)
Face corresponds to upper circular tube (10) and the position of lower circulation pipe (11) is fixedly installed with horizontal bracket (13), and horizontal bracket (13)
End be fixedly connected with semicircular ring, upper circular tube (10) is located in semicircular ring, and the outer surface of upper circular tube (10) and semicircle
The contact of ring inner wall.
7. a kind of novel forging roll bearing arrangement according to claim 6, it is characterised in that: above the upper forging roller (4)
Horizontal bracket (13) upper surface be fixedly installed with one group of blower (14), the upper and lower surface of semicircular ring offers threaded hole, screw thread
Bolt is bolted in hole, upper circular tube (10) is fixedly connected by bolt with horizontal bracket (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910536697.7A CN110227780A (en) | 2019-06-20 | 2019-06-20 | A kind of novel forging roll bearing arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910536697.7A CN110227780A (en) | 2019-06-20 | 2019-06-20 | A kind of novel forging roll bearing arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110227780A true CN110227780A (en) | 2019-09-13 |
Family
ID=67856359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910536697.7A Pending CN110227780A (en) | 2019-06-20 | 2019-06-20 | A kind of novel forging roll bearing arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110227780A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113617989A (en) * | 2021-08-06 | 2021-11-09 | 江苏倍嘉力机械科技有限公司 | Forging die cooling device for automobile accessory production |
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|---|---|---|---|---|
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| JP4072653B2 (en) * | 1998-06-15 | 2008-04-09 | 株式会社Ｉｈｉ | Die changing device and method for plate thickness reduction press |
| CN105750468A (en) * | 2016-05-20 | 2016-07-13 | 武汉理工大学 | Liquid nitrogen cooling device and method for automobile front axle roll forging die |
| CN106040746A (en) * | 2016-06-21 | 2016-10-26 | 首钢京唐钢铁联合有限责任公司 | Roller cooling method and device |
| CN205816673U (en) * | 2016-07-14 | 2016-12-21 | 山东千里马锻压自动化设备有限公司 | The forging roll guide-bar mechanism of arbitrarily angled roll forging die enabling is installed |
| CN207205146U (en) * | 2017-09-26 | 2018-04-10 | 王生鹏 | A kind of roll forging machine of hardware metal piece |
| CN109130012A (en) * | 2018-10-31 | 2019-01-04 | 大连函量科技发展有限公司 | A kind of mold equipped with Quick cooling structure |
| CN208408032U (en) * | 2018-05-16 | 2019-01-22 | 嘉兴市乍浦杭湾重型机械有限公司 | One kind rolling rod cooling device forging |
| CN209000983U (en) * | 2018-11-01 | 2019-06-18 | 天津航星电子科技有限公司 | A kind of battery modules |
-
2019
- 2019-06-20 CN CN201910536697.7A patent/CN110227780A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4072653B2 (en) * | 1998-06-15 | 2008-04-09 | 株式会社Ｉｈｉ | Die changing device and method for plate thickness reduction press |
| CN1947932A (en) * | 2005-10-14 | 2007-04-18 | 气体产品与化学公司 | Cryofluid assisted forming method |
| CN105750468A (en) * | 2016-05-20 | 2016-07-13 | 武汉理工大学 | Liquid nitrogen cooling device and method for automobile front axle roll forging die |
| CN106040746A (en) * | 2016-06-21 | 2016-10-26 | 首钢京唐钢铁联合有限责任公司 | Roller cooling method and device |
| CN205816673U (en) * | 2016-07-14 | 2016-12-21 | 山东千里马锻压自动化设备有限公司 | The forging roll guide-bar mechanism of arbitrarily angled roll forging die enabling is installed |
| CN207205146U (en) * | 2017-09-26 | 2018-04-10 | 王生鹏 | A kind of roll forging machine of hardware metal piece |
| CN208408032U (en) * | 2018-05-16 | 2019-01-22 | 嘉兴市乍浦杭湾重型机械有限公司 | One kind rolling rod cooling device forging |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113617989A (en) * | 2021-08-06 | 2021-11-09 | 江苏倍嘉力机械科技有限公司 | Forging die cooling device for automobile accessory production |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20210716 Address after: 255200 Xinting sub district office, Luxi Economic Development Zone, Xin County, Liaocheng City, Shandong Province Applicant after: Shandong Hongkun Intelligent Technology Co.,Ltd. Address before: 255100 Longquan Zhen Quantou Cun Bei, Zichuan District, Zibo City, Shandong Province Applicant before: ZIBO HONGJIE FORGING EQUIPMENT Co.,Ltd. |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190913 |
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