CN115740854A - Novel recreated long-life continuous casting roller surfacing equipment - Google Patents
Novel recreated long-life continuous casting roller surfacing equipment Download PDFInfo
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- CN115740854A CN115740854A CN202211458563.6A CN202211458563A CN115740854A CN 115740854 A CN115740854 A CN 115740854A CN 202211458563 A CN202211458563 A CN 202211458563A CN 115740854 A CN115740854 A CN 115740854A
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- 238000009749 continuous casting Methods 0.000 title claims abstract description 93
- 238000003466 welding Methods 0.000 claims description 32
- 230000008646 thermal stress Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 2
- 230000035882 stress Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Abstract
The invention relates to the technical field of continuous casting roller surfacing, in particular to novel re-created long-life continuous casting roller surfacing equipment which comprises a base, two support frames, two connecting blocks and a vertical plate, wherein the two connecting blocks and the vertical plate are fixedly connected to the top of the base, the two support frames are symmetrically arranged on the top of the base, a telescopic rod is connected between the two support frames, and a continuous casting roller is sleeved on the outer surface of the telescopic rod. The continuous casting roller after being overlaid and welded is conveyed to the vibrating plate, the round rod and the crank are driven to swing in a rotating mode through the driving motor, the connecting rod is driven to drive the connecting shaft and the guide plate to swing up and down, the ejection column is driven to continuously impact the valve seat, the vibrating plate is in a vibrating state, the effect of vibrating the continuous casting roller on the vibrating plate is achieved, thermal stress on the surface of the continuous casting roller is eliminated, the using performance of the continuous casting roller is further improved, and the creativity of the continuous casting roller is enhanced.
Description
Technical Field
The invention relates to the technical field of continuous casting roller surfacing, in particular to novel re-created long-service-life continuous casting roller surfacing equipment.
Background
In the production of a steel mill, a long-service-life continuous casting roll is mainly used for keeping a steel billet solidified, the surface of the roll is oxidized and peeled off under the action of mechanical stress, thermal fatigue and metal abrasion in long-term use, cracks are easy to generate to cause breakage, the problems of service life and potential safety hazards exist, and the service performance of the continuous casting roll is improved by adopting a surfacing welding mode in the prior art.
After surfacing of the long-life continuous casting roller is completed, the surface temperature of the long-life continuous casting roller is high, so that residual thermal stress can be generated, in the conventional surfacing equipment, a natural cooling method is usually adopted for eliminating thermal stress, the long-life continuous casting roller is placed outdoors, the surface temperature of the long-life continuous casting roller is reduced through natural cooling, the outdoor temperature is uneven, the temperature is unbalanced when the long-life continuous casting roller is cooled, the surface deformation and even cracking of the long-life continuous casting roller can be caused after long time, and the re-creativity of the long-life continuous casting roller is further influenced.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides novel and re-created continuous casting roller surfacing equipment with long service life.
In order to achieve the purpose, the invention adopts the following technical scheme:
a novel re-created long-life continuous casting roller surfacing device comprises a base, two support frames, two connecting blocks and a vertical plate, wherein the connecting blocks and the vertical plate are fixedly connected to the top of the base;
except that stress mechanism is including being located the fixed plate at base top, the inner wall of fixed plate is equipped with driving motor one, driving motor one's output is connected with the round bar, the through-hole has been seted up to the outer wall of connecting block, the tip of round bar runs through-hole and swing joint be in on the inner wall of connecting block, the middle part symmetry of round bar is equipped with two cranks, two be equipped with the connecting rod between the crank, the tip of connecting rod is equipped with the connecting axle, the connecting rod passes through connecting axle fixedly connected with deflector, the outer wall of deflector is equipped with the fore-set, the top of connecting block is equipped with the vibration board, the outer bottom symmetry of vibration board is equipped with two connecting axle sleeves, two the bottom of connecting axle sleeve is connected with the spring, the vibration board passes through spring coupling and is in the top of connecting block, the top center department of vibration board be equipped with fore-set matched with disk seat. Through removing stress mechanism, place the continuous casting roller on vibration board, it is rotatory to drive the round bar through driving motor for the guide plate moves the fore-set striking disk seat, makes the vibration board produce the difference in height, thereby has driven the continuous casting roller vibration through the vibration board, has finally eliminated the thermal stress on continuous casting roller surface through the vibration fast
As preferred, be located the left support frame inner wall is equipped with electric putter, electric putter's output is equipped with connecting rod one, the tip of connecting rod one is equipped with the circular recess, the telescopic link passes through the circular recess joint and is in the inside of connecting rod one is located the right side support frame inner wall is equipped with driving motor two, driving motor two's output is equipped with the motor shaft, the telescopic link runs through continuous casting roller and joint are in the tip of motor shaft, be equipped with the build-up welding subassembly directly over telescopic link and the continuous casting roller. Through the tip of cup jointing the continuous casting roller to the telescopic link, start electric putter and drive the telescopic link extension, until inlay the spacing block card to spacing inslot to can carry out the block with telescopic link and motor shaft, can drive the motor shaft through driving motor two and rotate with the continuous casting roller, be of value to and carry out omnidirectional build-up welding to the build-up welding layer of continuous casting roller.
Preferably, the build-up welding subassembly is including being located the slide rail of riser outer wall one side, the inner wall of slide rail is equipped with electric hydraulic cylinder, electric hydraulic cylinder's output is connected with connecting rod two, the tip of connecting rod two is equipped with the movable block, the outer wall fixedly connected with welding of movable block removes the frame, the bottom that the welding removed the frame extends to just be connected with the soldered connection directly over the continuous casting roller. The electric hydraulic cylinder drives the second connecting rod, the moving block and the welding moving frame to move, and the welding moving frame drives the welding head to move above the continuous casting roller, so that a surfacing layer of the continuous casting roller can be subjected to surfacing welding.
Preferably, a driving motor III is arranged below the continuous casting roll and in the inner wall of the support frame, the output end of the driving motor III is connected with a driving shaft, a driven shaft is arranged on the other side of the driving shaft, a conveying belt is sleeved on the outer surfaces of the driving shaft and the driven shaft, the tail of the conveying belt extends to the upper portion of the vibrating plate, and the end of the driven shaft penetrates through the conveying belt and is movably connected to the inner wall of the support frame. The driving shaft and the driven shaft rotate to drive the conveying belt to transmit, so that the continuous casting roller on the conveying belt can be conveyed to the vibrating plate to perform stress removal work.
Preferably, a limit groove is formed in the inner wall of one end, close to the motor shaft, of the telescopic rod, and a limit block matched with the limit groove is arranged on the outer wall of the motor shaft. Through inlay the spacing block card to the spacing inslot, be of value to the motor shaft and drive the telescopic link and rotate.
Preferably, the outer surface of the continuous casting roll is provided with a surfacing layer. The surfacing welding is carried out on the surfacing layer of the continuous casting roller through the welding head, so that the service performance of the continuous casting roller is improved.
The invention has the beneficial effects that:
according to the novel re-created long-life continuous casting roller surfacing equipment provided by the invention, the surfacing-welded continuous casting roller is conveyed to the vibrating plate, the round rod and the crank are driven to rotate and swing through the driving motor, so that the connecting rod is driven to drive the connecting shaft and the guide plate to swing up and down, the ejection column is further driven to continuously impact the valve seat, and finally, under the action of the round rod, the vibrating plate is in a constantly vibrating state, the effect of vibrating the continuous casting roller on the vibrating plate is achieved, the thermal stress on the surface of the continuous casting roller is favorably eliminated, the service performance of the continuous casting roller is further improved, and the re-creativity of the continuous casting roller is enhanced;
the end part of the continuous casting roll is sleeved to one end of the telescopic rod, the electric push rod is started to drive the first connecting rod and the telescopic rod to extend, the telescopic rod penetrates through the interior of the continuous casting roll and extends to the end part of the motor shaft, the limiting block on the motor shaft is clamped and embedded in the limiting groove at one end of the telescopic rod, so that the motor shaft can be installed and clamped on the telescopic rod, the motor shaft, the telescopic rod and the continuous casting roll are driven to rotate by the second driving motor, and all-dimensional surfacing welding of a surfacing layer of the continuous casting roll is facilitated;
after surfacing is completed, the continuous casting roll is placed on the conveying belt, the driving shaft and the driven shaft are driven to rotate through the driving motor III, then the conveying belt is driven to convey, the continuous casting roll on the conveying belt is conveyed to the vibrating plate to be subjected to stress removing work, manual conveying is not needed, therefore, the labor hour is saved, and the working efficiency in the process of eliminating the surface stress of the continuous casting roll is improved.
Drawings
FIG. 1 is a schematic diagram of the general structure of a novel and inventive long-life continuous casting roller surfacing welding device;
FIG. 2 is a schematic top view of a base of a novel and inventive long-life continuous casting roll bead welding device according to the present invention;
FIG. 3 is a structural schematic diagram of a stress removing mechanism of the novel and re-created long-life continuous casting roll surfacing equipment provided by the invention;
FIG. 4 is a schematic view of a round bar structure of a novel and inventive long-life continuous casting roll surfacing device;
FIG. 5 is a schematic structural diagram of a continuous casting roll of the novel and re-created long-life continuous casting roll overlaying welding device provided by the invention;
fig. 6 is a schematic structural diagram of an enlarged part at a point a of the novel and innovative long-life continuous casting roll overlaying device provided by the invention.
In the figure:
1. a base; 2. a support frame; 3. connecting blocks; 4. a fixing plate; 401. driving a motor I; 402. a round bar; 403. a crank; 404. a connecting rod; 405. a connecting shaft; 406. a guide plate; 407. a top pillar; 5. a vibrating plate; 501. a valve seat; 502. connecting the shaft sleeve; 503. a spring; 6. an electric push rod; 601. a first connecting rod; 602. a telescopic rod; 603. continuous casting rolls; 604. overlaying a welding layer; 605. a limiting groove; 7. a second driving motor; 701. a motor shaft; 702. a limiting block; 8. a drive shaft; 9. a driven shaft; 10. a conveyor belt; 11. a vertical plate; 12. a slide rail; 121. an electric hydraulic cylinder; 122. a second connecting rod; 123. a moving block; 13. welding the movable frame; 14. and (5) welding a head.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Those not described in detail in this specification are within the skill of the art.
The standard parts used in the invention can be purchased from the market, the special-shaped parts can be customized according to the description of the specification and the accompanying drawings, the specific connection mode of each part adopts conventional means such as bolts, rivets, welding and the like mature in the prior art, the machines, the parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, so that the detailed description is omitted.
Example (b):
referring to fig. 1-6, a novel re-created long-life continuous casting roller surfacing device comprises a base 1, two support frames 2, two connecting blocks 3 and two vertical plates 11, wherein the connecting blocks 3 and the vertical plates 11 are fixedly connected to the top of the base 1, the two support frames 2 are symmetrically arranged on the top of the base 1, a telescopic rod 602 is connected between the two support frames 2, a continuous casting roller 603 is sleeved on the outer surface of the telescopic rod 602, and a stress removing mechanism is arranged on one side of each connecting block 3;
except that stress mechanism is including being located the fixed plate 4 at base 1 top, the inner wall of fixed plate 4 is equipped with driving motor 401, the output of driving motor 401 is connected with round bar 402, the through-hole has been seted up to the outer wall of connecting block 3, the tip of round bar 402 runs through the through-hole and swing joint is on the inner wall of connecting block 3, the middle part symmetry of round bar 402 is equipped with two cranks 403, be equipped with connecting rod 404 between two cranks 403, the tip of connecting rod 404 is equipped with connecting axle 405, connecting rod 404 passes through connecting axle 405 fixedly connected with deflector 406, the outer wall of deflector 406 is equipped with fore-set 407, the top of connecting block 3 is equipped with vibration board 5, the outer bottom symmetry of vibration board 5 is equipped with two connecting axle sleeves 502, the bottom of two connecting axle sleeves 502 is connected with spring 503, vibration board 5 passes through spring 503 and connects the top at connecting block 3, the top center department of vibration board 5 is equipped with the disk seat 501 with fore-set 407 matched with.
Further, the inner wall of the support frame 2 on the left side is provided with an electric push rod 6, the output end of the electric push rod 6 is provided with a first connecting rod 601, the end part of the first connecting rod 601 is provided with a circular groove, a telescopic rod 602 is connected to the inside of the first connecting rod 601 through the circular groove in a clamping manner, the inner wall of the support frame 2 on the right side is provided with a second driving motor 7, the output end of the second driving motor 7 is provided with a motor shaft 701, the telescopic rod 602 penetrates through the continuous casting roller 603 and is connected to the end part of the motor shaft 701, and a surfacing assembly is arranged right above the telescopic rod 602 and the continuous casting roller 603.
Further, the surfacing subassembly includes the slide rail 12 that is located riser 11 outer wall one side, and the inner wall of slide rail 12 is equipped with electric hydraulic cylinder 121, and electric hydraulic cylinder 121's output is connected with connecting rod two 122, and the tip of connecting rod two 122 is equipped with the movable block 123, and the outer wall fixedly connected with welding of movable block 123 removes frame 13, and the bottom that the welding removed frame 13 extends to the continuous casting roller 603 directly over and is connected with soldered connection 14.
Further, a driving motor III is arranged below the continuous casting roll 603 and in the inner wall of the support frame 2, an output end of the driving motor III is connected with a driving shaft 8, a driven shaft 9 is arranged on the other side of the driving shaft 8, a conveyor belt 10 is sleeved on the outer surfaces of the driving shaft 8 and the driven shaft 9, the tail portion of the conveyor belt 10 extends to the upper portion of the vibrating plate 5, and the end portion of the driven shaft 9 penetrates through the conveyor belt 10 and is movably connected in the inner wall of the support frame 2.
Furthermore, a limit groove 605 is formed in an inner wall of one end of the telescopic rod 602 close to the motor shaft 701, and a limit block 702 matched with the limit groove 605 is arranged on an outer wall of the motor shaft 701.
Further, the outer surface of the continuous casting roll 603 is provided with a build-up layer 604.
Specifically, when the continuous casting roll 603 needs to be overlaid, firstly, the end of the continuous casting roll 603 is sleeved to one end of the telescopic rod 602, then the electric push rod 6 is started, the electric push rod 6 drives the first connecting rod 601 and the telescopic rod 602 to extend, the telescopic rod 602 penetrates through the interior of the continuous casting roll 603 until the end is extended to the end of the motor shaft 701, the limit block 702 on the motor shaft 701 is clamped and embedded into the limit groove 605 at one end of the telescopic rod 602, so that the installation and clamping of the telescopic rod 602 on the motor shaft 701 are completed, then the second driving motor 7 and the electric hydraulic cylinder 121 are respectively started, the second driving motor 7 works to drive the motor shaft 701 to rotate, the motor shaft 701 rotates to respectively drive the telescopic rod 602 and the continuous casting roll 603 to rotate, the electric hydraulic cylinder 121 works to push the second connecting rod 122, the second connecting rod 122 moves to drive the moving block 123 to move, the moving block 123 moves to drive the welding moving frame 13 and the welding head 14 to move above the continuous casting roll 603, so that the welding head 14 performs the surfacing operation on the surfacing layer 604 of the continuous casting roller 603, after the surfacing operation on the continuous casting roller 603 is completed, the electric push rod 6 is started again, the electric push rod 6 drives the connecting rod I601 and the continuous casting roller 603 to be retracted, then the continuous casting roller 603 drops on the conveyor belt 10, then the driving motor III is started, the driving motor III drives the driving shaft 8 to roll, the driving shaft 8 rolls to drive one end of the conveyor belt 10 to transmit, so that the conveyor belt 10 transmits between the driving shaft 8 and the driven shaft 9, and further the continuous casting roller 603 on the conveyor belt 10 is transmitted to the vibrating plate 5, at this time, the driving motor I401 is started, the driving motor I401 works to drive the round rod 402 to rotate, the round rod 402 rotates to drive the crank to rotate and swing, when the crank 403 rotates, one end of the connecting rod 404 is driven to swing with the round rod 402 as a fulcrum, and then the other end of the connecting rod 404 drives the connecting shaft 405 to swing up and down, when the connecting shaft 405 swings up and down, the guide plate 406 is driven to swing up and down, when the guide plate 406 swings up and down, the ejection column 407 is driven to continuously impact the valve seat 501, the connecting block 3 is connected with the vibrating plate 5 through the spring 503, so that a certain height difference is generated under the action of the round rod 402, finally, the vibrating plate 5 is in a vibrating state all the time, the vibrating plate 5 vibrates to drive the continuous casting roll 603 in the vibrating plate 5 to vibrate, the thermal stress on the surface of the continuous casting roll 603 after build-up welding is quickly eliminated through vibration, the service life of the continuous casting roll 603 is prolonged, and the continuous casting roll 603 has creativity.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The novel re-created long-life continuous casting roller surfacing equipment comprises a base (1), support frames (2), connecting blocks (3) and vertical plates (11), and is characterized in that the connecting blocks (3) and the vertical plates (11) are fixedly connected to the top of the base (1), the two support frames (2) are symmetrically arranged at the top of the base (1), a telescopic rod (602) is connected between the two support frames (2), a continuous casting roller (603) is sleeved on the outer surface of the telescopic rod (602), and a stress removing mechanism is arranged on one side of the connecting blocks (3);
except that stress mechanism is including being located fixed plate (4) at base (1) top, the inner wall of fixed plate (4) is equipped with driving motor (401), the output of driving motor (401) is connected with round bar (402), the through-hole has been seted up to the outer wall of connecting block (3), the tip of round bar (402) runs through-hole and swing joint be in on the inner wall of connecting block (3), the middle part symmetry of round bar (402) is equipped with two cranks (403), two be equipped with connecting rod (404) between crank (403), the tip of connecting rod (404) is equipped with connecting axle (405), connecting rod (404) are through connecting axle (405) fixedly connected with deflector (406), the outer wall of deflector (406) is equipped with fore-set (407), the top of connecting block (3) is equipped with vibration board (5), the outer bottom symmetry of vibration board (5) is equipped with two connecting axle sleeves (502), two the bottom of connecting axle sleeve (502) is connected with spring (503), vibration board (5) are connected at the top of connecting block (3) through spring (503), the top department be equipped with fore-set (501) matched with disk seat (407).
2. The novel re-created long-life continuous casting roller surfacing equipment according to claim 1, characterized in that an electric push rod (6) is arranged on the inner wall of the support frame (2) on the left side, a first connecting rod (601) is arranged at the output end of the electric push rod (6), a circular groove is formed in the end portion of the first connecting rod (601), the telescopic rod (602) is connected to the inside of the first connecting rod (601) in a clamping manner through the circular groove, a second driving motor (7) is arranged on the inner wall of the support frame (2) on the right side, a motor shaft (701) is arranged at the output end of the second driving motor (7), the telescopic rod (602) penetrates through the continuous casting roller (603) and is connected to the end portion of the motor shaft (701), and a surfacing component is arranged right above the telescopic rod (602) and the continuous casting roller (603).
3. The novel re-created long-life continuous casting roll surfacing equipment according to claim 2, characterized in that the surfacing component includes a slide rail (12) located on one side of the outer wall of the vertical plate (11), the inner wall of the slide rail (12) is provided with an electric hydraulic cylinder (121), the output end of the electric hydraulic cylinder (121) is connected with a second connecting rod (122), the end of the second connecting rod (122) is provided with a moving block (123), the outer wall of the moving block (123) is fixedly connected with a welding moving frame (13), and the bottom of the welding moving frame (13) extends to the position right above the continuous casting roll (603) and is connected with a welding head (14).
4. The novel re-created long-life continuous casting roller surfacing welding equipment according to claim 1 is characterized in that a driving motor III is arranged below the continuous casting roller (603) and in the inner wall of the support frame (2), the output end of the driving motor III is connected with a driving shaft (8), a driven shaft (9) is arranged on the other side of the driving shaft (8), a conveying belt (10) is sleeved on the outer surfaces of the driving shaft (8) and the driven shaft (9), the tail portion of the conveying belt (10) extends to the position above the vibrating plate (5), and the end portion of the driven shaft (9) penetrates through the conveying belt (10) and is movably connected into the inner wall of the support frame (2).
5. A novel re-created long-life continuous casting roller overlaying equipment according to claim 2, wherein a limiting groove (605) is formed in the inner wall of one end of said telescopic rod (602) close to said motor shaft (701), and a limiting block (702) matched with said limiting groove (605) is arranged on the outer wall of said motor shaft (701).
6. A novel and inventive long-life continuous casting roll overlay welding apparatus according to claim 1, characterized in that the outer surface of the continuous casting roll (603) is provided with an overlay (604).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211458563.6A CN115740854A (en) | 2022-11-18 | 2022-11-18 | Novel recreated long-life continuous casting roller surfacing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211458563.6A CN115740854A (en) | 2022-11-18 | 2022-11-18 | Novel recreated long-life continuous casting roller surfacing equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115740854A true CN115740854A (en) | 2023-03-07 |
Family
ID=85333958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211458563.6A Withdrawn CN115740854A (en) | 2022-11-18 | 2022-11-18 | Novel recreated long-life continuous casting roller surfacing equipment |
Country Status (1)
| Country | Link |
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| CN (1) | CN115740854A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116275866A (en) * | 2023-04-13 | 2023-06-23 | 常州本森焊业科技有限公司 | Long-life continuous casting roller prosthetic devices |
-
2022
- 2022-11-18 CN CN202211458563.6A patent/CN115740854A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116275866A (en) * | 2023-04-13 | 2023-06-23 | 常州本森焊业科技有限公司 | Long-life continuous casting roller prosthetic devices |
| CN116275866B (en) * | 2023-04-13 | 2023-08-29 | 常州本森焊业科技有限公司 | Long-life continuous casting roller prosthetic devices |
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Application publication date: 20230307 |