CN113426835B - Hot rolling device for magnesium-aluminum alloy plate - Google Patents
Hot rolling device for magnesium-aluminum alloy plate Download PDFInfo
- Publication number
- CN113426835B CN113426835B CN202110977490.0A CN202110977490A CN113426835B CN 113426835 B CN113426835 B CN 113426835B CN 202110977490 A CN202110977490 A CN 202110977490A CN 113426835 B CN113426835 B CN 113426835B
- Authority
- CN
- China
- Prior art keywords
- driving
- roller
- hollow roller
- hollow
- hot rolling
- 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.)
- Active
Links
- 238000005098 hot rolling Methods 0.000 title claims abstract description 21
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 15
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 230000005540 biological transmission Effects 0.000 claims description 11
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 abstract description 15
- 229910003023 Mg-Al Inorganic materials 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
- B21B27/10—Lubricating, cooling or heating rolls externally
- B21B27/106—Heating the rolls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
- B21B27/03—Sleeved rolls
- B21B27/032—Rolls for sheets or strips
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B2003/001—Aluminium or its alloys
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- General Induction Heating (AREA)
Abstract
The invention discloses a hot rolling device for a magnesium-aluminum alloy plate, which comprises a rack, wherein two hollow rollers are rotatably arranged on the rack, the rack is also rotatably connected with two driving rollers, the driving rollers are provided with a driving device for driving the hollow rollers to rotate, and the driving device comprises T-shaped shifting teeth and springs; the hollow roller internal rotation is connected with the pivot, install the heating device who is used for heating the hollow roller in the pivot, heating device includes connecting rod, vortex coil and swing mechanism. The movable T-shaped shifting teeth are arranged, so that the starting and stopping of the hollow roller can be conveniently controlled, meanwhile, the heating device is arranged, and the eddy current coil can swing back and forth on the two sides of the hollow roller through the swinging mechanism, so that the periphery of the hollow roller can be uniformly heated, the rolling quality of a plate is improved, the hollow roller can be uniformly insulated when the hollow roller stops rotating, the hollow roller is protected, and the efficiency of a rolling process is improved.
Description
Technical Field
The invention relates to the technical field of metal plate rolling, in particular to a hot rolling device for a magnesium-aluminum alloy plate.
Background
In the processing process flow of alloy steel plates, the plates are often required to be rolled, the rolling is generally divided into hot rolling and cold rolling, wherein for magnesium-aluminum alloy plates, a high-temperature hot rolling process is generally adopted.
The prior magnesium-aluminum alloy plate rolling equipment provides 'a magnesium alloy plate rolling device' as the application number is '201410743354.5', and the device realizes the constant temperature rolling of magnesium alloy and other metals difficult to deform through a roller sleeve and a sleeve heating device. However, in the actual production process, because the lengths of the plates are limited, when a magnesium-aluminum alloy plate is rolled, the roller needs to be stopped, and the next plate is conveyed to continue rolling, in the process, the coil for heating is still continuously electrified and heated (the coil is prevented from being damaged by frequent opening and closing, and the coil is prevented from being heated slowly when being restarted due to temperature reduction), and because the roller stops, the coil continuously heats the same position of the roller sleeve, so that the roller sleeve is heated unevenly, the rolling quality of the plate is reduced, and the roller sleeve is deformed or damaged due to long-time heating of the same position of the roller sleeve. In view of this, the present document proposes a hot rolling apparatus for a magnesium aluminum alloy sheet.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a hot rolling device for a magnesium-aluminum alloy plate.
In order to achieve the purpose, the invention adopts the following technical scheme:
a hot rolling device for magnesium-aluminum alloy plates comprises a rack, wherein two hollow rollers are rotatably arranged on the rack, two driving rollers are further rotatably connected to the rack, a driving device for driving the hollow rollers to rotate is arranged on each driving roller, each driving device comprises a T-shaped shifting tooth and a spring, a plurality of shifting tooth grooves are formed in the inner wall of each hollow roller at equal intervals, a plurality of sliding grooves are formed in the side wall of each driving roller at equal intervals, the T-shaped shifting tooth is arranged in each sliding groove in a sealing and sliding mode, an air supply groove communicated with the corresponding sliding groove is formed in the side wall of each driving roller, and the T-shaped shifting tooth is elastically connected to the inner wall of each sliding groove through the springs;
the hollow roller is rotatably connected with a rotating shaft, a heating device for heating the hollow roller is mounted on the rotating shaft, and the heating device comprises a connecting rod, an eddy current coil and a swinging mechanism;
the swing mechanism is used for driving the rotating shaft to swing back and forth and comprises a driving disc, a rotating rod, a rack and a gear.
Preferably, the center of the connecting rod is fixedly arranged on the rotating shaft, the number of the eddy current coils is two, and the two eddy current coils are respectively arranged at two ends of the connecting rod.
Preferably, the drive groove has been seted up to the lateral wall of frame, the driving-disc all rotates with the gear and sets up in the drive groove, the rack slides and sets up in the drive groove and with gear engagement, the one end and the driving-disc rotation of dwang are connected, the other end and the rack rotation of dwang are connected.
Preferably, one end of the rotating shaft, which is far away from the connecting rod, extends into the driving groove, and one end of the rotating shaft, which is located in the driving groove, is fixedly arranged at the axis position of the gear.
Preferably, a transmission rod is fixedly connected to the axis of the driving disk, and one end of the transmission rod, which is far away from the driving disk, is coaxially and fixedly connected to the driving roller.
The invention has the following beneficial effects:
1. the movable T-shaped shifting teeth are arranged, so that the starting and stopping of the hollow roller can be conveniently controlled, meanwhile, the heating device is arranged, and the eddy current coil can swing back and forth on the two sides of the hollow roller through the swing mechanism, so that the periphery of the hollow roller can be uniformly heated, the rolling quality of a plate is improved, the hollow roller can be uniformly insulated when the plate stops rotating, the hollow roller is protected, and the efficiency of a rolling process is improved;
2. the T-shaped shifting teeth and the shifting tooth grooves can replace the traditional friction transmission mode, so that the transmission efficiency of the device is higher, the energy loss is greatly reduced, and the device also has a certain energy-saving effect;
3. through setting up the spring, still can be through the atmospheric pressure in the control air feed groove to the rate of tension of adjustable hollow roller lateral wall and to the pressure of panel, in order to conveniently control the rolling technology of panel.
Drawings
FIG. 1 is a schematic structural view of a hot rolling apparatus for a Mg-Al alloy sheet according to the present invention;
FIG. 2 is a schematic sectional front view showing a hot rolling apparatus for a Mg-Al alloy plate according to the present invention;
FIG. 3 is an enlarged view of the structure at A in FIG. 2;
FIG. 4 is a schematic sectional view of the back side of a hot rolling apparatus for Mg-Al alloy sheet according to the present invention.
In the figure: the device comprises a machine frame 1, a hollow roller 2, a driving roller 3, an eddy current coil 4, a connecting rod 5, a rotating shaft 6, a sliding chute 7, an air supply groove 8, a tooth shifting tooth 9T, a tooth shifting groove 10, a driving groove 11, a driving disc 12, a rotating rod 13, a rack 14, a gear 15, a plate 16, a spring 17 and a transmission rod 18.
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.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1-4, a hot rolling device for a magnesium-aluminum alloy plate comprises a frame 1, wherein two hollow rolls 2 are rotatably arranged on the frame 1, two driving rolls 3 are also rotatably connected to the frame 1, a driving device for driving the hollow rolls 2 to rotate is arranged on the driving rolls 3, and the driving device comprises a T-shaped shifting tooth 9 and a spring 17; a plurality of tooth pulling grooves 10 are formed in the inner wall of the hollow roller 2 at equal intervals, a plurality of sliding grooves 7 are formed in the side wall of the driving roller 3 at equal intervals, T-shaped pulling teeth 9 are arranged in the sliding grooves 7 in a sealing and sliding mode, an air supply groove 8 communicated with the sliding grooves 7 is formed in the side wall of the driving roller 3, and the T-shaped pulling teeth 9 are elastically connected to the inner wall of the sliding grooves 7 through springs 17.
A rotating shaft 6 is rotatably connected in the hollow roller 2, a heating device for heating the hollow roller 2 is installed on the rotating shaft 6, and the heating device comprises a connecting rod 5, an eddy current coil 4 and a swinging mechanism; the center of connecting rod 5 is fixed to be set up on pivot 6, and eddy current coil 4 has two, and two eddy current coil 4 are installed respectively at the both ends of connecting rod 5. Specifically, as shown in fig. 1 and 2, each eddy current coil 4 is disposed around one side of the hollow roller 2, so as to uniformly heat the inner and outer side walls of the hollow roller 2 along with the rotation of the hollow roller 2, and it is worth mentioning that the swing mechanism further swings the eddy current coil 4 back and forth, so as to increase the contact time between the inner and outer side walls of the hollow roller 2, thereby improving the heating efficiency of the hollow roller 2, and also preventing the temperature of the hollow roller 2 from dropping, so as to ensure the rolling quality of the plate 16.
The swing mechanism is used for driving the rotating shaft 6 to swing back and forth, and comprises a driving disc 12, a rotating rod 13, a rack 14 and a gear 15. Drive slot 11 has been seted up to the lateral wall of frame 1, driving-disc 12 all rotates with gear 15 and sets up in drive slot 11, rack 14 slides and sets up in drive slot 11 and meshes with gear 15, the one end and the driving-disc 12 of dwang 13 rotate and are connected, the other end and the rack 14 of dwang 13 rotate and are connected, the one end that connecting rod 5 was kept away from to pivot 6 extends to in the drive slot 11, and the fixed axle center position department that sets up at gear 15 of one end that pivot 6 is located drive slot 11. It should be noted that, the connection position of the rotating rod 13 and the driving disk 12 is eccentrically arranged, the rack 14 vertically slides up and down in the driving groove 11, and the driving disk 12, the rotating rod 13 and the rack 14 form a slider-crank mechanism, so that the rack 14 is pushed to slide up and down reciprocally when the driving disk 12 rotates. A transmission rod 18 is fixedly connected to the axial center of the driving disc 12, and one end of the transmission rod 18, which is far away from the driving disc 12, is coaxially and fixedly connected with the driving roller 3.
In the operation process of the device, air can be supplied into the air supply groove 8 through the air pumping equipment, so that the air pressure in the air supply groove 8 and each sliding groove 7 can be increased, and each T-shaped poking tooth 9 is pushed to slide outwards, at the moment, when the driving roller 3 rotates, each T-shaped poking tooth 9 continuously enters into the poking tooth groove 10, and the driving roller 3 can drive the hollow roller 2 to rotate synchronously when rotating. Meanwhile, the driving roller 3 drives the driving disc 12 to rotate through the transmission rod 18 when rotating, and the driving disc 12, the rotating rod 13 and the rack 14 form a crank-slider mechanism, so that the rack 14 reciprocates up and down along with the circular rotation of the driving disc 12, and the gear 15 meshed with the rack rotates back and forth, thereby driving the rotating shaft 6, the connecting rod 5 and the eddy current coils 4 on the two sides to swing back and forth (the movement positions of the eddy current coils 4 are shown by dotted lines in fig. 2), the electrified eddy current coils 4 can uniformly heat all parts of the side wall of the hollow roller 2 which rotates continuously, and the two hollow rollers 2 can perform hot rolling on a passing plate 16 after rotating.
After one plate is rolled, air in the air supply groove 8 and the sliding groove 7 is pumped out by controlling the air pumping equipment, each T-shaped poking tooth 9 is attracted by negative pressure to move back, the driving roller 3 is disconnected with the hollow roller 2 at the moment, the driving roller 3 does not drive the hollow roller 2 to rotate, the hollow roller 2 stops rotating, and the next plate to be rolled can be conveniently installed. And the drive roller 3 still accessible swing mechanism drives the 4 back and forth oscillations of eddy current coil this moment, therefore eddy current coil 4 can carry out even heating around its lateral wall when hollow roller 2 stall, both can prevent to hollow roller 2 part heat bias and warp impaired, still can keep warm to hollow roller 2 simultaneously, make hollow roller 2 whole keep higher temperature, when carrying out hot rolling to next panel 16 like this, the temperature everywhere of hollow roller 2 can not descend, make panel 16 can be by quick, even heating, the efficiency of rolling has also been improved when improving rolling quality.
Furthermore, the device can transmit the torque of the driving roller 3 to the hollow roller 2 through the T-shaped shifting teeth 9, compared with the traditional driving mode through friction force, the device has higher transmission efficiency obviously, so that the energy loss is reduced, the output torque of the driving roller 3 can be properly reduced, and partial electric energy consumption can be saved. In addition, the acting force of the T-shaped shifting teeth 9 on the inner wall of the hollow roll 2 can be adjusted by controlling the air pressure input into the air supply grooves 8 and the sliding grooves 7, so that the tension of the circumferential side wall of the hollow roll 2 and the pressure on the plate 16 can be controlled, and the hot rolling process on the plate 16 can be controlled.
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 (5)
1. A hot rolling device for a magnesium-aluminum alloy plate comprises a frame (1), wherein two hollow rolls (2) are rotatably arranged on the frame (1), it is characterized in that the frame (1) is also rotationally connected with two driving rollers (3), and the driving roller (3) is provided with a driving device for driving the hollow roller (2) to rotate, the driving device comprises a T-shaped shifting tooth (9) and a spring (17), a plurality of shifting tooth grooves (10) are arranged on the inner wall of the hollow roller (2) at equal intervals, a plurality of sliding grooves (7) are arranged on the side wall of the driving roller (3) at equal intervals, the T-shaped shifting teeth (9) are arranged in the sliding groove (7) in a sealing and sliding manner, the side wall of the driving roller (3) is provided with an air supply groove (8) communicated with the sliding groove (7), the spring (17) elastically connects the T-shaped shifting teeth (9) to the inner wall of the sliding groove (7);
a rotating shaft (6) is rotatably connected in the hollow roller (2), a heating device for heating the hollow roller (2) is installed on the rotating shaft (6), and the heating device comprises a connecting rod (5), an eddy coil (4) and a swinging mechanism;
the swing mechanism is used for driving the rotating shaft (6) to swing back and forth, and comprises a driving disc (12), a rotating rod (13), a rack (14) and a gear (15).
2. A hot rolling apparatus for al-mg-alloy sheet according to claim 1, wherein the connecting rod (5) is fixed at its center to the rotary shaft (6), and there are two eddy current coils (4), and the two eddy current coils (4) are installed at both ends of the connecting rod (5).
3. A hot rolling device for a magnesium-aluminum alloy plate according to claim 1, wherein a driving groove (11) is formed in a side wall of the frame (1), the driving plate (12) and the gear (15) are both rotatably arranged in the driving groove (11), the rack (14) is slidably arranged in the driving groove (11) and meshed with the gear (15), one end of the rotating rod (13) is rotatably connected with the driving plate (12), and the other end of the rotating rod (13) is rotatably connected with the rack (14).
4. A hot rolling device for magnesium-aluminum alloy sheet according to claim 3, wherein the end of the rotating shaft (6) far from the connecting rod (5) extends into the driving groove (11), and the end of the rotating shaft (6) in the driving groove (11) is fixedly arranged at the axial center position of the gear (15).
5. A hot rolling device for magnesium-aluminum alloy plates according to claim 4, characterized in that a transmission rod (18) is fixedly connected to the axial center of the driving disc (12), and one end of the transmission rod (18) far away from the driving disc (12) is coaxially and fixedly connected with the driving roller (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110977490.0A CN113426835B (en) | 2021-08-24 | 2021-08-24 | Hot rolling device for magnesium-aluminum alloy plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110977490.0A CN113426835B (en) | 2021-08-24 | 2021-08-24 | Hot rolling device for magnesium-aluminum alloy plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113426835A CN113426835A (en) | 2021-09-24 |
| CN113426835B true CN113426835B (en) | 2021-10-29 |
Family
ID=77797775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110977490.0A Active CN113426835B (en) | 2021-08-24 | 2021-08-24 | Hot rolling device for magnesium-aluminum alloy plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113426835B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114959364A (en) * | 2022-07-01 | 2022-08-30 | 温州医科大学附属口腔医院 | Degradable Zn-xRE alloy and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1599132A (en) * | 1968-05-15 | 1970-07-15 | ||
| CN104384187A (en) * | 2014-12-08 | 2015-03-04 | 太原科技大学 | Magnesium alloy sheet rolling device |
| CN104438329A (en) * | 2014-12-08 | 2015-03-25 | 太原科技大学 | Rolling method for magnesium alloy plates |
| CN205914524U (en) * | 2016-08-26 | 2017-02-01 | 张家港保税区中天机电设备有限公司 | Light roll |
| CN109365531A (en) * | 2018-12-14 | 2019-02-22 | 太原科技大学 | A kind of melting fibre reinforced magnalium casting and rolling composite plate molding equipment and method online |
| CN208991463U (en) * | 2018-09-30 | 2019-06-18 | 广东润鑫实业投资有限公司 | Coil of strip cold roll auxiliary drive |
-
2021
- 2021-08-24 CN CN202110977490.0A patent/CN113426835B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1599132A (en) * | 1968-05-15 | 1970-07-15 | ||
| CN104384187A (en) * | 2014-12-08 | 2015-03-04 | 太原科技大学 | Magnesium alloy sheet rolling device |
| CN104438329A (en) * | 2014-12-08 | 2015-03-25 | 太原科技大学 | Rolling method for magnesium alloy plates |
| CN205914524U (en) * | 2016-08-26 | 2017-02-01 | 张家港保税区中天机电设备有限公司 | Light roll |
| CN208991463U (en) * | 2018-09-30 | 2019-06-18 | 广东润鑫实业投资有限公司 | Coil of strip cold roll auxiliary drive |
| CN109365531A (en) * | 2018-12-14 | 2019-02-22 | 太原科技大学 | A kind of melting fibre reinforced magnalium casting and rolling composite plate molding equipment and method online |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113426835A (en) | 2021-09-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113426835B (en) | Hot rolling device for magnesium-aluminum alloy plate | |
| CN201473106U (en) | Automatic aluminium bar feeding device for hollow glass | |
| CN110314933B (en) | Steel plate rolling device and method | |
| CN203876298U (en) | Wallpaper printing system | |
| CN111872126B (en) | Hot rolling mill with speed regulation and roller automatic switching function | |
| CN216192548U (en) | Cooling device of steel cylinder rolling type annealing furnace | |
| CN215785892U (en) | Metal plate bending machine | |
| CN214160972U (en) | Steel plate arc bending device | |
| CN220760822U (en) | Pre-rolling feeding roller for spiral duct forming machine | |
| CN220127201U (en) | Metal hot roll machine with guiding anti-displacement structure | |
| CN116274523B (en) | Rolling device with metal rebound prevention function | |
| CN209065949U (en) | A kind of driving mechanism of tempering furnace agitating device | |
| CN207981861U (en) | A kind of nickel ingot hot rolling centralising device | |
| CN217183504U (en) | Electromagnetic heating device for calendering | |
| CN207293709U (en) | A kind of sheet spread structure of rewinding machine | |
| CN215320821U (en) | Ferrite composite membrane circulating fracturing device | |
| CN105729701A (en) | Peeling roller position adjusting device | |
| CN211892377U (en) | Clutch mechanism of printing machine impression device | |
| CN209973481U (en) | Fire prevention heat preservation integration composite sheet production facility | |
| CN208811010U (en) | A kind of apparatus for leveling of novel filtering net | |
| CN208370462U (en) | Stepless automatic transmission shutter | |
| CN112343175A (en) | Heat loss prevention energy-saving green building structure and adjusting method thereof | |
| CN216610171U (en) | Roller structure with uniform temperature difference | |
| CN209065964U (en) | A kind of driving device of tempering furnace circulation mechanism | |
| CN210547112U (en) | Novel steel sheet rolling device |
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 |