CN111604386A - Device for correcting deformation of box cover of leaf storage box - Google Patents
Device for correcting deformation of box cover of leaf storage box Download PDFInfo
- Publication number
- CN111604386A CN111604386A CN202010303280.9A CN202010303280A CN111604386A CN 111604386 A CN111604386 A CN 111604386A CN 202010303280 A CN202010303280 A CN 202010303280A CN 111604386 A CN111604386 A CN 111604386A
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- China
- Prior art keywords
- frame
- storage box
- leaf storage
- jacking frame
- retainer
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- 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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- 244000208734 Pisonia aculeata Species 0.000 claims description 19
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000002184 metal Substances 0.000 abstract description 26
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 26
- 239000010935 stainless steel Substances 0.000 abstract description 26
- 238000000034 method Methods 0.000 abstract description 8
- 241000208125 Nicotiana Species 0.000 abstract description 7
- 235000002637 Nicotiana tabacum Nutrition 0.000 abstract description 7
- 230000000694 effects Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/003—Positioning devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/02—Advancing work in relation to the stroke of the die or tool
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention relates to a deformation correcting device for a box cover of a leaf storage box, belonging to the technical field of tobacco machinery; comprises a retainer, a frame, a jacking frame and a hydraulic cylinder; the top of the frame is fixedly provided with a retainer with the shape consistent with that of the leaf storage box cover, the hydraulic cylinder is fixedly arranged on the frame, a piston rod of the hydraulic cylinder is fixedly provided with a jacking frame with the shape matched with that of the retainer, and the jacking frame is positioned below the retainer. The invention adopts the mode of combining the hydraulic cylinder with the retainer and the jacking frame for correction to process the box covers with different degrees of deformation and complex deformation, and the stainless steel metal covered edges of the deformed box covers are stably, quickly and effectively corrected and leveled, thereby greatly reducing the workload of workers and effectively improving the efficiency of correcting the box covers; the flatness of the corrected box cover meets the requirement, so that the problem of shutdown failure caused by the unevenness of the box cover is reduced.
Description
Technical Field
The invention belongs to the technical field of tobacco machinery, and particularly relates to a deformation correcting device for a box cover of a leaf storage box.
Background
Most of the tobacco shred manufacturing workshops of the cigarette factory adopt a box type tobacco leaf storage mode to store the tobacco leaves after the primary feeding process is finished; the temperature (humidity) of the leaf storage environment of the leaf storage is controlled by the box type leaf storage, so that good feed liquid absorption and tobacco leaf moisture balance effects are achieved, and the alcoholization effect of tobacco flakes in the leaf storage process is improved. In the actual production process, as the leaf storage box needs to be frequently subjected to operation operations such as delivery, return, box cover removal, box cover connection, leaf storage box turning and the like, after the leaf storage box is used for a long time, the box cover of the leaf storage box is often impacted and abraded, and the stainless steel metal edge of the box cover of the leaf storage box is deformed to different degrees. At present, after the deformed box cover is detected and found, the deformed box cover is basically processed in a mode of manually knocking by a hammer, and the mode has two defects: on one hand, the deformation condition of the box cover is complex, the stainless steel metal wrapping toughness is strong, the manual processing difficulty is high, the correction flatness is not high, and meanwhile, the processing workload is large and the time consumption is long; on the other hand, the manual box cover correction is not high in flatness, so that the fault shutdown of the box turnover machine due to the unevenness of the treated box cover can be caused.
Disclosure of Invention
In order to overcome the problems in the background art, the invention provides a deformation correcting device for the box cover of a leaf storage box, which adopts a mode of combining a hydraulic cylinder with a retainer and a jacking frame for correction to process the box covers with different degrees of deformation and complex deformation, so that the stainless steel metal edge of the deformed box cover is stably, quickly and effectively corrected and leveled, the manual workload is greatly reduced, and the box cover correcting efficiency is effectively improved; the flatness of the corrected box cover meets the requirement, so that the problem of shutdown failure caused by the unevenness of the box cover is reduced.
In order to realize the purpose, the invention is realized by the following technical scheme:
a deformation correcting device for a box cover of a leaf storage box comprises a retainer 1, a rack 5, a jacking frame 6 and a hydraulic cylinder 7; the leaf storage box is characterized in that a retainer 1 with the same shape as the leaf storage box cover is fixedly mounted at the top of the rack 5, a hydraulic cylinder 7 is fixedly mounted on the rack 5, a jacking frame 6 with the shape matched with that of the retainer 1 is fixedly mounted on a piston rod of the hydraulic cylinder 7, and the jacking frame 6 is located below the retainer 1.
Furthermore, the top of the frame 5 is at least fixedly provided with a supporting sliding mechanism 3 which is convenient for pushing the leaf storage box cover into the jacking frame 6.
Further, the supporting sliding mechanism 3 includes a roller 301, roller brackets 302 and a roller shaft 303, the roller shaft 303 is provided with at least two rollers 301 at equal intervals, two ends of the roller shaft 303 are respectively and fixedly installed on the two roller brackets 302, and the two roller brackets 302 are fixedly installed on the top of the frame 5.
Further, the rack 5 is a square frame rack, and includes a square top plate 501, brackets 502, and a middle lifting plate 503, the square top plate 501 is fixedly mounted on the four brackets 502, the middle lifting plate 503 is fixedly mounted on the four brackets 502, and the middle lifting plate 503 is located below the square top plate 501.
Further, the hydraulic cylinder 7 is fixedly installed on the middle lifting plate 503, the end of the piston rod of the hydraulic cylinder 7 is fixed at the bottom of the jacking frame 6 after penetrating through the square top plate 501, and the jacking frame 6 is of a square frame structure.
Further, at least two pairs of symmetrical pull-back spring frames 504 are mounted on the top of the middle lifting plate 503, spring hooks 6012 corresponding to the pull-back spring frames 504 one by one are disposed at the bottom of the jacking frame 6, one end of the pull-back spring 2 is fixed to the pull-back spring frame 504, and the other end of the pull-back spring 2 is fixed to the spring hook 6012 corresponding to the pull-back spring frame 504.
Further, the jacking frame 6 on be provided with the fretwork part, support slide mechanism 3 is installed at the 5 tops of the frame of fretwork part normal degree, and support slide mechanism 3 is also installed to the outside frame 5 of jacking frame 6.
Further, two stop blocks 6011 are fixedly installed on one side of the jacking frame 6 parallel to the supporting sliding mechanism 3.
Further, a tool box 4 for placing a correction tool is arranged on the middle lifting plate 503; the aligner has a straight bar-shaped aligner 403 and an L-shaped aligner 402 of different sizes.
The invention has the beneficial effects that:
the invention adopts the mode of combining the hydraulic cylinder with the retainer and the jacking frame for correction to process the box covers with different degrees of deformation and complex deformation, and the stainless steel metal covered edges of the deformed box covers are stably, quickly and effectively corrected and leveled, thereby greatly reducing the workload of workers and effectively improving the efficiency of correcting the box covers; the flatness of the corrected box cover meets the requirement, so that the problem of shutdown failure caused by the unevenness of the box cover is reduced.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the supporting slide mechanism of the present invention;
FIG. 3 is a schematic structural view of the frame of the present invention;
FIG. 4 is a schematic structural view of a jacking frame of the present invention;
FIG. 5 is a schematic view of an installation structure of the jacking frame of the present invention;
FIG. 6 is a schematic view of the tool box and the calibration tool of the present invention;
fig. 7 is a schematic structural view of a cover of the leaf storage box.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention and the accompanying drawings, 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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, a deformation correcting device for a box cover of a leaf storage box comprises a retainer 1, a frame 5, a jacking frame 6 and a hydraulic cylinder 7; the leaf storage box is characterized in that a retainer 1 with the same shape as the leaf storage box cover is fixedly mounted at the top of the rack 5, a hydraulic cylinder 7 is fixedly mounted on the rack 5, a jacking frame 6 with the shape matched with that of the retainer 1 is fixedly mounted on a piston rod of the hydraulic cylinder 7, and the jacking frame 6 is located below the retainer 1. The leaf storage box cover to be corrected is placed on the jacking frame 6, the hydraulic cylinder 7 is used as a jacking mechanism, the jacking frame 6 is jacked upwards through the work of the hydraulic cylinder 7, the gap between the jacking frame 6 and the retainer 1 is reduced, stainless steel metal wrapping edges of the leaf storage box cover are extruded through the jacking frame 6 and the retainer 1, and in the extrusion process, the surfaces of the retainer 1 and the jacking frame 6 are utilized to apply acting force to the stainless steel metal wrapping edges of the box cover so that the leaf storage box cover is leveled. Meanwhile, the retainer 1 and the jacking frame 6 can be repeatedly used for clamping the leaf storage box cover to level the deformed box cover until the requirement of the flatness is met.
In the present invention, as shown in fig. 3, the rack 5 is a square frame rack, and includes a square top plate 501, brackets 502, and a middle lifting plate 503, the square top plate 501 is fixedly mounted on the four brackets 502, the middle lifting plate 503 is fixedly mounted on the four brackets 502, and the middle lifting plate 503 is located below the square top plate 501. In the invention, a hydraulic cylinder 7 is fixedly arranged on a middle lifting plate 503, the end part of a piston rod of the hydraulic cylinder 7 is fixed at the bottom of a jacking frame 6 after penetrating through a square top plate 501, and the jacking frame 6 is of a square frame structure; the number of the hydraulic cylinders 7 is four, and the four hydraulic cylinders correspond to four corners of the jacking frame 6 respectively. The leaf storage box used at present is basically of a square structure, and the square frame type rack is designed to be consistent with the structures of the jacking frame 6 and the retainer 1, so that the retainer 1 can be ensured to be more fixed, and the retainer 1 and the jacking frame 6 can be ensured to apply stable acting force to the deformed leaf storage box cover. Meanwhile, an intermediate lifting plate 503 is provided for mounting the corresponding hydraulic cylinder 7 and other components; act on jacking frame 6 through four pneumatic cylinders 7, can guarantee that pneumatic cylinder 7 is even to the effort that is the jacking frame 6 application of square frame structure, and the stainless steel metal of guaranteeing the leaf storage box case lid that warp is bordured and is received even effect simultaneously, guarantees its flattening correction effect.
In the invention, at least two pairs of symmetrical pull-back spring frames 504 are mounted on the top of the middle lifting plate 503, spring hooks 6012 corresponding to the pull-back spring frames 504 one by one are arranged at the bottom of the jacking frame 6, one end of the pull-back spring 2 is fixed on the pull-back spring frame 504, and the other end of the pull-back spring 2 is fixed on the spring hook 6012 corresponding to the pull-back spring frame 504. Through setting up pull-back spring 2, after pneumatic cylinder 7 pressure release, can cooperate 7 effects of pneumatic cylinder, pull back the normal position with jacking frame 6.
In the invention, at least one supporting sliding mechanism 3 which is convenient for pushing the cover of the leaf storage box into the jacking frame 6 is fixedly arranged at the top of the frame 5. Jacking frame 6 on be provided with the fretwork part, the 5 tops of the frame of fretwork part regularity are installed and are supported slide mechanism 3, and the outside frame 5 of jacking frame 6 also installs and support slide mechanism 3. As shown in fig. 2, the supporting sliding mechanism 3 includes a roller 301, a roller bracket 302, and a roller shaft 303, wherein the roller shaft 303 is provided with at least two rollers 301 at equal intervals, two ends of the roller shaft 303 are respectively and fixedly installed on the two roller brackets 302, and the two roller brackets 302 are fixedly installed on the top of the frame 5. The gyro wheel 301 can rotate on roller shaft 303 under the exogenic action, when needing to place the leaf storage case lid that warp on jacking frame 6, can lift the leaf storage case lid that warp back on the support slide mechanism 3 in the jacking frame 6 outside earlier, then, the staff gently under the effect of gyro wheel 301, can be light quick send the leaf storage case lid that warp to reach the correction position between jacking frame 6 and the holder 1.
In the present invention, as shown in fig. 4-5, two stoppers 6011 are preferably fixedly installed on one side of the jacking frame 6 parallel to the supporting sliding mechanism 3. Through setting up two dog 6011, when the staff promoted the leaf storage box case lid that warp to two dog 6011, when the side of case lid supports and bumps two dog 6011, explain that leaf storage box case lid has arrived the correction position accurately, can avoid like this that the case lid impels not in place, the condition that influences the correction effect appears.
In the present invention, as shown in fig. 6, a tool box 4 for placing a calibration tool is provided on the middle lifting plate 503; the calibrator has a straight bar-shaped calibrator 403 and an L-shaped calibrator 402 of different sizes. If the deformed box cover is not corrected to meet the requirements through the retainer 1 and the jacking frame 6, at the moment, straight-bar-shaped correction tools 403 or L-shaped correction tools 402 with different sizes can be adopted according to different positions of the box cover, the straight-bar-shaped correction tools 403 or the L-shaped correction tools 402 are placed at the connecting position of the stainless steel metal wrapping edge of the box cover and the oak board, namely the root of the stainless steel metal wrapping edge, and are padded up, if the box cover collapses downwards, the straight-bar-shaped correction tools are padded above the root of the stainless steel metal wrapping edge, and the collapsed position is jacked up after the retainer 1 and the jacking frame 6 clamp the stainless steel metal wrapping edge; if the box cover is upwarped, the box cover is placed below the root of the stainless steel metal wrapping edge, and after the stainless steel metal wrapping edge is clamped by the retainer 1 and the jacking frame 6, the upwarped position is pressed downwards, so that the deformation position of the stainless steel metal wrapping edge can be corrected.
The working process of the invention is as follows:
lifting one side of the cover of the leaf storage box with the stainless steel metal wrapping edge seriously deformed onto a supporting sliding mechanism 3 on the outer side of the jacking frame 6, slightly pushing the cover by hand, pushing the whole box cover into the jacking frame 6 until the whole box cover is blocked by a stop block 6011, and then pushing the box cover to a correction position; then, starting a hydraulic cylinder 7, extending a piston rod of the hydraulic cylinder 7, pushing the deformed box cover to ascend along with the jacking frame 6, extruding the stainless steel metal wrapping edge of the deformed box cover along with the smaller and smaller gap between the jacking frame 6 and the retainer 1, flattening the warped stainless steel metal wrapping edge, stopping the hydraulic cylinder 7 after the pressure reaches a certain value, keeping the jacking frame 6 and the retainer 1 to clamp the box cover for a period of time, and then starting the hydraulic cylinder 7 again to enable the hydraulic cylinder 7 to drive the jacking frame 6 to descend back to the original position; the staff can check the leveling condition of the deformed box cover at the moment; if the leveling requirement is not met, clamping and leveling again; and if the requirement is met, lifting the leveled box cover out, and continuously correcting the next deformed box cover. If the deformation of the box cover is still serious after repeated clamping correction, at the moment, a straight-bar-shaped correction tool 403 or an L-shaped correction tool 402 with different sizes can be adopted according to different positions of the box cover, the straight-bar-shaped correction tool 403 or the L-shaped correction tool 402 is placed at the connecting position of the stainless steel metal wrapping edge and the oak board of the box cover, namely the root of the stainless steel metal wrapping edge, and is cushioned above the root of the stainless steel metal wrapping edge if the box cover collapses downwards, and the collapsed position is jacked up after the stainless steel metal wrapping edge is clamped by the retainer 1 and the jacking frame 6; if the box cover is upwarped, the box cover is placed below the root of the stainless steel metal wrapping edge, and after the stainless steel metal wrapping edge is clamped by the retainer 1 and the jacking frame 6, the upwarped position is pressed downwards, so that the deformation position of the stainless steel metal wrapping edge can be corrected.
The invention adopts the mode of combining the hydraulic cylinder with the retainer and the jacking frame for correction to process the box covers with different degrees of deformation and complex deformation, and the stainless steel metal covered edges of the deformed box covers are stably, quickly and effectively corrected and leveled, thereby greatly reducing the workload of workers and effectively improving the efficiency of correcting the box covers; the flatness of the corrected box cover meets the requirement, so that the problem of shutdown failure caused by the unevenness of the box cover is reduced.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (9)
1. The utility model provides a correction device is warp to storage leaf case lid which characterized in that: the deformation correcting device for the box cover of the leaf storage box comprises a retainer (1), a rack (5), a jacking frame (6) and a hydraulic cylinder (7); the leaf storage box is characterized in that a retainer (1) with the shape identical to that of a leaf storage box cover is fixedly mounted at the top of the rack (5), a hydraulic cylinder (7) is fixedly mounted on the rack (5), a jacking frame (6) with the shape matched with that of the retainer (1) is fixedly mounted on a piston rod of the hydraulic cylinder (7), and the jacking frame (6) is located below the retainer (1).
2. The device for correcting deformation of a cover of a leaf storage box according to claim 1, wherein: the top of the frame (5) is at least fixedly provided with a supporting sliding mechanism (3) which is convenient for pushing the leaf storage box cover into the jacking frame (6).
3. The device for correcting deformation of the cover of the leaf storage box according to claim 2, wherein: the supporting sliding mechanism (3) comprises rollers (301), roller supports (302) and roller shafts (303), wherein the roller shafts (303) are provided with at least two rollers (301) at equal intervals, two ends of each roller shaft (303) are respectively and fixedly arranged on the two roller supports (302), and the two roller supports (302) are fixedly arranged at the top of the rack (5).
4. The device for correcting deformation of a lid of a leaf storage box according to any one of claims 1 to 3, wherein: the frame (5) be square frame, including square roof (501), support (502), middle board (503) of raising, square roof (501) fixed mounting on four supports (502), middle board (503) of raising fixed mounting on four supports (502), and middle board (503) of raising is located the below of square roof (501).
5. The device for correcting deformation of a lid of a leaf storage box according to claim 4, wherein: the hydraulic cylinder (7) is fixedly arranged on the middle lifting plate (503), the end part of a piston rod of the hydraulic cylinder (7) is fixed at the bottom of the jacking frame (6) after penetrating through the square top plate (501), and the jacking frame (6) is of a square frame structure.
6. The device for correcting deformation of a lid of a leaf storage box according to claim 5, wherein: the top of the middle lifting plate (503) is at least provided with two pairs of symmetrical pull-back spring frames (504), the bottom of the jacking frame (6) is provided with spring hooks (6012) which correspond to the pull-back spring frames (504) one by one, one end of each pull-back spring (2) is fixed on the corresponding pull-back spring frame (504), and the other end of each pull-back spring (2) is fixed on the corresponding spring hook (6012) of the pull-back spring frame (504).
7. The device for correcting deformation of a lid of a leaf storage box according to claim 5 or 6, wherein: jacking frame (6) on be provided with the fretwork part, support slide mechanism (3) are installed at frame (5) top of fretwork part regularity, and support slide mechanism (3) are also installed in outside frame (5) of jacking frame (6).
8. The device for correcting deformation of a lid of a leaf storage box according to claim 7, wherein: and two stop blocks (6011) are fixedly arranged on one side of the jacking frame (6) parallel to the supporting sliding mechanism (3).
9. The device for correcting deformation of a lid of a leaf storage box according to any one of claims 5 to 6 and 8, wherein: a tool box (4) for placing a correction tool is arranged on the middle lifting plate (503); the correction tool has a straight bar-shaped correction tool (403) and an L-shaped correction tool (402) of different sizes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010303280.9A CN111604386B (en) | 2020-04-17 | 2020-04-17 | Device for correcting deformation of box cover of leaf storage box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010303280.9A CN111604386B (en) | 2020-04-17 | 2020-04-17 | Device for correcting deformation of box cover of leaf storage box |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111604386A true CN111604386A (en) | 2020-09-01 |
| CN111604386B CN111604386B (en) | 2022-04-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010303280.9A Active CN111604386B (en) | 2020-04-17 | 2020-04-17 | Device for correcting deformation of box cover of leaf storage box |
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| Country | Link |
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| CN (1) | CN111604386B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113369334A (en) * | 2021-06-24 | 2021-09-10 | 安徽瑞林精科股份有限公司 | Case leveling device |
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| CN209886430U (en) * | 2019-03-27 | 2020-01-03 | 河南兴安邦机电装备制造有限公司 | A restore leveling device for aluminum alloy plate |
| CN212349936U (en) * | 2020-04-17 | 2021-01-15 | 红云红河烟草(集团)有限责任公司 | Device for correcting deformation of box cover of leaf storage box |
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| JPS61119331A (en) * | 1984-11-14 | 1986-06-06 | Yoshizo Yamamoto | Method and device for annealing of casting made of aluminum alloy |
| CN201183078Y (en) * | 2008-04-15 | 2009-01-21 | 吕平 | Manual hydraulic type steel belt shaper |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113369334A (en) * | 2021-06-24 | 2021-09-10 | 安徽瑞林精科股份有限公司 | Case leveling device |
| CN113369334B (en) * | 2021-06-24 | 2023-02-21 | 安徽瑞林精科股份有限公司 | Case leveling device |
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| Publication number | Publication date |
|---|---|
| CN111604386B (en) | 2022-04-12 |
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