CN111136123A - Color steel winding machine - Google Patents
Color steel winding machine Download PDFInfo
- Publication number
- CN111136123A CN111136123A CN201911389945.6A CN201911389945A CN111136123A CN 111136123 A CN111136123 A CN 111136123A CN 201911389945 A CN201911389945 A CN 201911389945A CN 111136123 A CN111136123 A CN 111136123A
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- CN
- China
- Prior art keywords
- main shaft
- seat
- sliding block
- color steel
- rod
- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
- B21C47/003—Regulation of tension or speed; Braking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
- B21C47/24—Transferring coils to or from winding apparatus or to or from operative position therein; Preventing uncoiling during transfer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
- B21C47/28—Drums or other coil-holders
- B21C47/30—Drums or other coil-holders expansible or contractible
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Unwinding Webs (AREA)
Abstract
The invention relates to a color steel winding and rolling machine, which comprises a rack, a variable frequency motor, a cycloidal pin gear speed reducer, a main shaft, a front bearing seat, a rear bearing seat, an arc-shaped plate, a concave sliding block and a convex sliding block, wherein the variable frequency motor and the cycloidal pin gear speed reducer are arranged on the upper surface of the rack; the middle part of the main shaft is connected with a front bearing seat through a bearing, an annular baffle is installed at the middle part of the main shaft through a nut, a plurality of arc plates are arranged on the front side of the baffle, concave sliding blocks are fixedly connected to the inner sides of the arc plates and matched with the convex sliding blocks, the convex sliding blocks are installed on the sleeve, the push-pull rod is fixedly connected with the rod seat, the rod seat is a revolving body, and the rod seat can drive the sleeve to move. The invention has high reliability, ensures the winding tightness when the arc plate is expanded, and is convenient to take away the colorful steel coil when the arc plate is retracted; the replacement time is short, and the operation is convenient.
Description
Technical Field
The invention belongs to the field of color steel plate production, and particularly relates to a color steel winding and rolling machine.
Background
The color steel coil means that the color coated steel plate is stored in a rolling mode and is a disc-shaped or columnar whole body so as to be convenient to carry. The color steel plate is a steel plate with an organic coating, and the color steel coil is mostly a single plate, and has the characteristics of light weight, heat insulation, high strength, bright color, flexible and quick installation and the like. The color steel plate is widely used for large-scale public buildings, public plants, movable board houses, integrated house walls and roofs. The rotating shaft of the existing color steel coil winder drives the winding, so that the color steel coil winder is easy to loosen and is labor-consuming in coil taking.
Disclosure of Invention
The invention aims to solve the technical problems that the traditional color steel coil is easy to loosen when being wound and is labor-consuming to take out.
In order to solve the technical problems, the invention adopts the following technical scheme: a color steel winding and rolling machine, which comprises a frame, a variable frequency motor, a cycloidal pin gear speed reducer, a main shaft, a front bearing seat, a rear bearing seat, an arc-shaped plate, a concave sliding block and a convex sliding block,
the machine frame is in a table shape, the bottom of the machine frame is provided with a plurality of support legs which can be locked on the ground, the variable frequency motor and the cycloidal pin gear speed reducer are arranged on the upper surface of the machine frame, the variable frequency motor drives the main shaft after the speed of the variable frequency motor is changed through the cycloidal pin gear speed reducer,
the rear part of the main shaft is connected with a rear bearing seat through a bearing and can rotate around the axis of the main shaft; the middle part of the main shaft is connected with a front bearing seat through a bearing, a brake disc is fixedly arranged at the rear end of the main shaft and is matched with a disc brake arranged on the frame,
the middle part of the main shaft is provided with an annular baffle plate through a nut, the baffle plate is fixed relative to the main shaft, a plurality of arc plates are arranged on the front side of the baffle plate, the arc plates are coaxial, a gap exists between the arc plates, the inner side of each arc plate is fixedly connected with a concave sliding block, the concave sliding blocks are matched with the convex sliding blocks, the contact parts are inclined planes and can move relatively, so that the distance between the outer side surfaces of the concave sliding blocks and the outer side surfaces of the convex sliding blocks are adjusted, and the arc plates are driven to expand or contract; the convex sliding block is arranged on a sleeve, the sleeve is cylindrical and is sleeved outside the main shaft,
the main shaft is hollow, a push-pull rod capable of automatically moving is mounted in the main shaft, a rod seat is arranged in front of the front end face of the main shaft and fixedly connected with the push-pull rod, the rod seat is a rotary body, and the rod seat can drive the sleeve to move; the push-pull rod is driven by an oil cylinder at the rear side of the main shaft to move,
an auxiliary wheel is arranged on the front side of the main shaft, the bottom of the auxiliary wheel is mounted on the supporting block, the bottom of the supporting block is connected with a screw rod, the screw rod is mounted on an auxiliary seat, and the screw rod can be rotated through an adjusting handle, so that the height of the supporting block is adjusted; the auxiliary wheel is internally provided with a bearing, and the front part of the rod seat is arranged in the auxiliary wheel.
Furthermore, a belt pulley is installed on an output shaft of the variable frequency motor, a belt pulley is also installed on an input shaft of the cycloidal pin gear speed reducer, and the two belt pulleys are driven by a B-type common V belt.
Furthermore, an output shaft of the cycloidal pin gear speed reducer is fixedly connected with a gear, and the gear is meshed with a gear fixedly connected to the main shaft to drive the main shaft to rotate.
Furthermore, a protective cover shell is arranged on the outer sides of the belt pulley, the B-type common V-belt transmission and the gear.
Furthermore, the auxiliary seat is not connected with the ground, a disc-shaped support is arranged at the bottom, and a plurality of reinforcing ribs are uniformly arranged on the disc-shaped support and the upper rod part.
Furthermore, there are multiunit concave slider, protruding slider, and every group has many pairs of concave slider, protruding slider, around main shaft annular equipartition.
The working principle of the invention is as follows:
the winding power of the invention is that a variable frequency motor drives a winding drum consisting of a main shaft and an arc-shaped plate to rotate through a speed reducer, and the linear speed of a coil is ensured to be synchronous with the linear speed of a rolled steel plate output by a rolling mill through the control of the variable frequency motor. The expansion and contraction and the coil unloading of the winding drum are realized through the control of a hydraulic system:
1. and (3) winding operation: the pull rod pulls the rod seat to enable the arc-shaped plate to expand outwards, the oil cylinder is located at a backward-retracted position, the push-pull rod drives the sleeve and the convex sliding block to move backwards, the outer diameter of the winding drum is self-determined by a user when the arc-shaped plate moves outwards, and the connecting steel plate can be wound;
2. a coil taking station: the push-pull rod moves forwards under the action of the oil cylinder to push the sleeve and the convex sliding block to move forwards, so that the arc-shaped plate retracts, the rolled color steel coil is loosened, the material receiving trolley moves towards the direction of the winding drum to reach the lower part of the color steel coil, the material receiving device is jacked upwards to be close to the lower part of the color steel coil, the auxiliary seat is removed, the color steel coil is pushed away from the winding machine by external force, and meanwhile, the material receiving trolley moves outwards synchronously.
The invention has the beneficial effects that:
1. the winding drum of the color steel winding and winding machine disclosed by the invention adopts a plurality of arc-shaped plates, the arc-shaped plates are controlled by combining the oil cylinder, the push-pull rod, the sleeve, the concave sliding block and the convex sliding block, the reliability is high, the winding tightness is ensured when the arc-shaped plates are expanded outwards, and the color steel coils are conveniently taken away when the arc-shaped plates are retracted;
2. after the winding shaft finishes winding, the replacement time is short, and the operation is convenient.
Drawings
FIG. 1 is a schematic perspective view of a color steel winding and rolling machine according to the present invention;
FIG. 2 is a schematic top view of a color steel winding and rolling machine of the present invention;
FIG. 3 is a schematic front sectional view of the color steel winding and unwinding machine of the present invention;
fig. 4 is a right-side schematic view of the color steel winding and rolling machine of the invention.
In the figure: an auxiliary seat; 2. a support block; 3. an adjusting handle; 4. an auxiliary wheel; 5. an arc-shaped plate; 6. a rod seat; 7. a frame; 8. a front bearing seat; 9. a rear bearing seat; 10. a protective housing; 11. a disc brake; 12. an oil cylinder; 13. a brake disc; 14. a variable frequency motor; 15. a cycloidal-pin gear speed reducer; 16. a main shaft; 17. a type B ordinary V belt; 18. a push-pull rod; 19. a bearing; 20. a concave slider; 21. a convex slider; 22. a sleeve; 23. a baffle plate; 24. a pulley.
Detailed Description
The details of the present invention are described below with reference to the accompanying drawings and specific embodiments.
As shown in figure 1, the color steel winding and rolling machine comprises a frame 7, a variable frequency motor 14, a cycloidal pin gear reducer 15, a main shaft 16, a front bearing seat 8, a rear bearing seat 9, an arc-shaped plate 5, a concave sliding block 20 and a convex sliding block 21,
the machine frame 7 is in a table shape, a plurality of support legs are arranged at the bottom and can be locked on the ground, the variable frequency motor 14 and the cycloidal pin gear speed reducer 15 are arranged on the upper surface of the machine frame 7, the variable frequency motor 14 drives the main shaft 16 after speed change through the cycloidal pin gear speed reducer 15,
as shown in fig. 2, the rear part of the main shaft 16 is connected with the rear bearing seat 9 through a bearing 19 and can rotate around the axis of the main shaft; the middle part of the main shaft 16 is connected with the front bearing seat 8 through a bearing 19, the rear end of the main shaft 16 is fixedly provided with a brake disc 13, the brake disc 13 is matched with a disc brake 11 arranged on the frame 7,
as shown in fig. 3, an annular baffle 23 is mounted in the middle of the main shaft 16 through a nut, the baffle 23 is fixed relative to the main shaft 16, a plurality of arc plates 5 are arranged on the front side of the baffle 23, the arc plates 5 are coaxial, a gap exists between the arc plates, a concave sliding block 20 is fixedly connected to the inner side of each arc plate 5, the concave sliding block 20 is matched with a convex sliding block 21, and a contact part is an inclined surface and can move relatively, so that the distance between the outer side surfaces of the concave sliding block 20 and the convex sliding block 21 is adjusted, and the arc plates 5 are driven to expand or contract; the convex sliding block 21 is arranged on a sleeve 22, the sleeve 22 is cylindrical and is sleeved outside the main shaft 16,
the main shaft 16 is hollow, the push-pull rod 18 capable of moving automatically is mounted in the main shaft, the rod seat 6 is arranged in front of the front end face of the main shaft 16, the push-pull rod 18 is fixedly connected with the rod seat 6, the rod seat 6 is a rotary body, and the rod seat 6 can drive the sleeve 22 to move; the push-pull rod 18 is driven by the oil cylinder 12 at the rear side of the main shaft 16 to move,
an auxiliary wheel 4 is arranged on the front side of the main shaft 16, the bottom of the auxiliary wheel 4 is arranged on the supporting block 2, the bottom of the supporting block 2 is connected with a screw rod, the screw rod is arranged on the auxiliary seat 1, and the screw rod can be rotated through an adjusting handle 3, so that the height of the supporting block 2 can be adjusted; the auxiliary wheel 4 is internally provided with a bearing 19, and the front part of the rod seat 6 is arranged in the auxiliary wheel 4.
As shown in fig. 4, in practical application, a belt pulley 24 is mounted on an output shaft of the variable frequency motor 14, a belt pulley 24 is also mounted on an input shaft of the cycloidal pin gear reducer 15, and the two belt pulleys 24 are driven by a B-type common V-belt 17.
In practical application, an output shaft of the cycloidal pin gear speed reducer 15 is fixedly connected with a gear, and the gear is meshed with a gear fixedly connected to the main shaft 16 to drive the main shaft 16 to rotate.
In practical application, the belt pulley 24, the B-type common V belt 17 and the outer side of the gear are provided with the protective cover 10.
In practical application, the auxiliary seat 1 is not connected with the ground, a disc-shaped support is arranged at the bottom, and a plurality of reinforcing ribs are uniformly arranged on the disc-shaped support and the upper rod part.
In practical application, there are multiple groups of the concave sliding blocks 20 and the convex sliding blocks 21, and each group has multiple pairs of concave sliding blocks 20 and convex sliding blocks 21 which are annularly and uniformly distributed around the main shaft 16.
In practical application, an automatic deviation corrector can be arranged on the frame, so that the color steel is rolled to be flush.
The working principle of the invention is as follows:
the winding power of the invention is that a variable frequency motor 14 drives a winding drum consisting of a main shaft 16 and an arc-shaped plate 5 to rotate through a speed reducer, and the linear speed of a coil is ensured to be synchronous with the linear speed of a rolled steel plate output by a rolling mill through the control of the variable frequency motor 14. The expansion and contraction and the coil unloading of the winding drum are realized through the control of a hydraulic system:
1. and (3) winding operation: the arc-shaped plate 5 is outwards expanded by pulling the rod seat 6 through the pull rod, the oil cylinder 12 is positioned at a backward-contracted position, the push-pull rod 18 drives the sleeve 22 and the convex sliding block 21 to move backwards, the outer diameter of the winding drum is self-determined by a user when the arc-shaped plate 5 moves outwards, and the connecting steel plate can be wound;
2. a coil taking station: the push-pull rod 18 moves forwards under the action of the oil cylinder 12 to push the sleeve 22 and the convex slide block 21 to move forwards, so that the arc-shaped plate 5 retracts, the rolled color steel coil is loosened, the material receiving trolley moves towards the direction of the winding drum to reach the lower part of the color steel coil, the material receiving device is jacked up to be close to the lower part of the color steel coil, the auxiliary seat 1 is removed, the color steel coil is pushed away from the winding machine by external force, and meanwhile, the material receiving trolley moves outwards synchronously.
In conclusion, the arc plate is controlled by the oil cylinder, the push-pull rod, the sleeve, the concave sliding block and the convex sliding block in a combined mode, the reliability is high, the winding tightness is guaranteed when the arc plate is expanded outwards, and the color steel coil is convenient to take away when the arc plate is retracted; the replacement time is short, and the operation is convenient.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the foregoing embodiments are merely illustrative of the technical spirit and features of the present invention, and the present invention is not limited thereto but may be implemented by those skilled in the art.
Claims (6)
1. A color steel winding and rolling machine is characterized in that: comprises a frame (7), a variable frequency motor (14), a cycloidal pin gear speed reducer (15), a main shaft (16), a front bearing seat (8), a rear bearing seat (9), an arc-shaped plate (5), a concave sliding block (20) and a convex sliding block (21),
the machine frame (7) is in a table shape, a plurality of support legs are arranged at the bottom and can be locked on the ground, the variable frequency motor (14) and the cycloidal pin gear speed reducer (15) are arranged on the upper surface of the machine frame (7), the variable frequency motor (14) drives the main shaft (16) after the speed is changed through the cycloidal pin gear speed reducer (15),
the rear part of the main shaft (16) is connected with a rear bearing seat (9) through a bearing (19) and can rotate around the axis of the main shaft; the middle part of the main shaft (16) is connected with the front bearing seat (8) through a bearing (19), the rear end of the main shaft (16) is fixedly provided with a brake disc (13), the brake disc (13) is matched with a disc brake (11) arranged on the frame (7),
the novel telescopic spindle is characterized in that an annular baffle (23) is mounted in the middle of the spindle (16) through a nut, the baffle (23) is fixed relative to the spindle (16), a plurality of arc plates (5) are arranged on the front side of the baffle (23), the arc plates (5) are coaxial, gaps exist among the arc plates, a concave sliding block (20) is fixedly connected to the inner side of each arc plate (5), the concave sliding block (20) is matched with a convex sliding block (21), the contact part is an inclined plane and can move relatively, so that the distance between the outer side surfaces of the concave sliding block (20) and the convex sliding block (21) is adjusted, and the arc plates (5) are driven to expand or contract; the convex sliding block (21) is arranged on a sleeve (22), the sleeve (22) is cylindrical and is sleeved outside the main shaft (16),
the main shaft (16) is hollow, a push-pull rod (18) capable of moving automatically is mounted in the main shaft, a rod seat (6) is arranged in front of the front end face of the main shaft (16), the push-pull rod (18) is fixedly connected with the rod seat (6), the rod seat (6) is a rotary body, and the rod seat (6) can drive the sleeve (22) to move; the push-pull rod (18) is driven by the oil cylinder (12) at the rear side of the main shaft (16) to move,
an auxiliary wheel (4) is arranged on the front side of the main shaft (16), the bottom of the auxiliary wheel (4) is installed on the supporting block (2), the bottom of the supporting block (2) is connected with a screw rod, the screw rod is installed on the auxiliary seat (1), and the screw rod can be rotated through an adjusting handle (3) so as to adjust the height of the supporting block (2); a bearing (19) is installed in the auxiliary wheel (4), and the front part of the rod seat (6) is installed in the auxiliary wheel (4).
2. The color steel winding and rolling machine according to claim 1, characterized in that: a belt pulley (24) is installed on an output shaft of the variable frequency motor (14), a belt pulley (24) is also installed on an input shaft of the cycloidal pin gear speed reducer (15), and the two belt pulleys (24) are driven by a B-type common V belt (17).
3. The color steel winding and rolling machine according to claim 2, characterized in that: an output shaft of the cycloidal pin gear speed reducer (15) is fixedly connected with a gear, and the gear is meshed with a gear fixedly connected to the main shaft (16) to drive the main shaft (16) to rotate.
4. The color steel winding and rolling machine according to claim 3, characterized in that: and a protective cover shell (10) is arranged on the outer side of the belt pulley (24), the transmission of the B-type common V-shaped belt (17) and the gear.
5. The color steel winding and rolling machine according to claim 1, characterized in that: the auxiliary seat (1) is not connected with the ground, the bottom of the auxiliary seat is provided with a disc-shaped support, and the disc-shaped support and the upper rod part are uniformly provided with a plurality of reinforcing ribs.
6. The color steel winding and rolling machine according to claim 1, characterized in that: the concave sliding blocks (20) and the convex sliding blocks (21) are provided with a plurality of groups, and each group is provided with a plurality of pairs of concave sliding blocks (20) and convex sliding blocks (21) which are annularly and uniformly distributed around the main shaft (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911389945.6A CN111136123A (en) | 2019-12-30 | 2019-12-30 | Color steel winding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911389945.6A CN111136123A (en) | 2019-12-30 | 2019-12-30 | Color steel winding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111136123A true CN111136123A (en) | 2020-05-12 |
Family
ID=70521624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911389945.6A Pending CN111136123A (en) | 2019-12-30 | 2019-12-30 | Color steel winding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111136123A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114453455A (en) * | 2022-02-17 | 2022-05-10 | 山东世纪正华金属科技有限公司 | Anti-loosening device for rolling hot-rolled stainless rolled plate |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01138019A (en) * | 1987-11-26 | 1989-05-30 | Mitsubishi Heavy Ind Ltd | Mandrel for down-coiler |
| JPH02108414A (en) * | 1988-10-17 | 1990-04-20 | Nishi Nippon Kogyo:Kk | Drum expanding and reducing apparatus |
| JPH0687023A (en) * | 1992-09-08 | 1994-03-29 | Nippon Steel Corp | Take-up machine for strip |
| CN201598336U (en) * | 2009-11-06 | 2010-10-06 | 安徽鑫科新材料股份有限公司 | Strip acid pickling line unwinding machine |
| CN103386425A (en) * | 2013-08-21 | 2013-11-13 | 衡阳中钢衡重设备有限公司 | Uncoiling machine |
| CN207680125U (en) * | 2017-12-07 | 2018-08-03 | 常州同泰高导新材料有限公司 | The collection device of leaf filter filter cloth |
-
2019
- 2019-12-30 CN CN201911389945.6A patent/CN111136123A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01138019A (en) * | 1987-11-26 | 1989-05-30 | Mitsubishi Heavy Ind Ltd | Mandrel for down-coiler |
| JPH02108414A (en) * | 1988-10-17 | 1990-04-20 | Nishi Nippon Kogyo:Kk | Drum expanding and reducing apparatus |
| JPH0687023A (en) * | 1992-09-08 | 1994-03-29 | Nippon Steel Corp | Take-up machine for strip |
| CN201598336U (en) * | 2009-11-06 | 2010-10-06 | 安徽鑫科新材料股份有限公司 | Strip acid pickling line unwinding machine |
| CN103386425A (en) * | 2013-08-21 | 2013-11-13 | 衡阳中钢衡重设备有限公司 | Uncoiling machine |
| CN207680125U (en) * | 2017-12-07 | 2018-08-03 | 常州同泰高导新材料有限公司 | The collection device of leaf filter filter cloth |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114453455A (en) * | 2022-02-17 | 2022-05-10 | 山东世纪正华金属科技有限公司 | Anti-loosening device for rolling hot-rolled stainless rolled plate |
| CN114453455B (en) * | 2022-02-17 | 2023-09-05 | 山东世纪正华金属科技有限公司 | Anti-loosening device for rolling hot-rolled stainless coiled plate |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200512 |
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| RJ01 | Rejection of invention patent application after publication |