CN112518001A - Arc-shaped trimming device for stainless steel well lid production and implementation method thereof - Google Patents
Arc-shaped trimming device for stainless steel well lid production and implementation method thereof Download PDFInfo
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- CN112518001A CN112518001A CN202011337732.1A CN202011337732A CN112518001A CN 112518001 A CN112518001 A CN 112518001A CN 202011337732 A CN202011337732 A CN 202011337732A CN 112518001 A CN112518001 A CN 112518001A
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- Prior art keywords
- stainless steel
- well lid
- arc
- trimming
- steel well
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D15/00—Shearing machines or shearing devices cutting by blades which move parallel to themselves
- B23D15/04—Shearing machines or shearing devices cutting by blades which move parallel to themselves having only one moving blade
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D15/00—Shearing machines or shearing devices cutting by blades which move parallel to themselves
- B23D15/12—Shearing machines or shearing devices cutting by blades which move parallel to themselves characterised by drives or gearings therefor
- B23D15/14—Shearing machines or shearing devices cutting by blades which move parallel to themselves characterised by drives or gearings therefor actuated by fluid or gas pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D33/00—Accessories for shearing machines or shearing devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D35/00—Tools for shearing machines or shearing devices; Holders or chucks for shearing tools
- B23D35/002—Means for mounting the cutting members
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
- E02D29/14—Covers for manholes or the like; Frames for covers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Devices For Opening Bottles Or Cans (AREA)
Abstract
The invention discloses an arc-shaped trimming device for stainless steel well lid production and an implementation method thereof, belonging to the technical field of stainless steel well lids. According to the arc-shaped trimming device for stainless steel well lid production and the implementation method thereof, manual trimming of the arc-shaped edge is not needed, the workload of operators can be reduced, the arc-shaped trimming efficiency is high, and when the trimming knife needs to be disassembled and maintained, the trimming knife can be disassembled from the mounting seat, so that the trimming knife is convenient to mount or disassemble and convenient to maintain.
Description
Technical Field
The invention relates to the technical field of stainless steel well lids, in particular to an arc-shaped edge cutting device for stainless steel well lid production and an implementation method thereof.
Background
The well lid for cover road or the deep well of family, prevent that people or object from falling, can divide into metal well lid, high strength fiber cement concrete well lid, resin well lid etc. according to the material, generally adopt circularly, can be used to greenbelt, pavement, motorway, pier, lane etc..
In the specific use process, the well lid has the following advantages: 1. the well lid has high compression strength, bending strength and impact strength, has toughness, can not be crushed and damaged after long-term use, and can thoroughly avoid the occurrence of urban black hole accidents; 2. the appearance is beautiful, the pattern design on the surface of the well cover is exquisite, the color is bright and adjustable, and the urban environment is beautified; 3. the use is convenient, and the weight is light; 4. the anti-theft device is provided with a locking structure according to the requirements of customers, so that the property in the well is prevented from being stolen; 5. the weather resistance is strong, and the paint can be normally used in the environment of minus 50 ℃ to plus 300 ℃; 6. acid and alkali resistance, corrosion resistance, wear resistance, vehicle rolling resistance and long service life.
The in-process of well lid production often needs to cut edge to the arc limit of well lid, and the mode that the arc limit of present well lid was cut edge is mostly the manual work and goes on, has increased operating personnel's work burden and has made the arc cut edge inefficiency.
Disclosure of Invention
The invention aims to provide an arc-shaped trimming device for stainless steel well lid production and an implementation method thereof, which do not need to trim arc-shaped edges manually, can reduce the workload of operators and ensure high arc-shaped trimming efficiency, and when a trimming knife needs to be disassembled and maintained, the trimming knife can be disassembled from a mounting seat, so that the trimming knife is convenient to assemble or disassemble and convenient to maintain, thereby solving the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides an arc side cut device is used in stainless steel well lid production, includes the operation panel, the last surface mounting of operation panel has the support frame, the last surface mounting of support frame has a driving motor, a driving motor's output shaft passes the support frame and connects on the swivel mount, the upper surface of swivel mount is provided with annular guide holder, annular guide holder inlays on the medial surface of support frame, be provided with the side cut sword on the swivel mount, the side cut sword is installed on the swivel mount through adjusting structure, the below of side cut sword is provided with the stainless steel well lid, the stainless steel well lid is placed on the operation panel.
Further, the adjusting structure comprises a second driving motor, a lead screw, a sliding block, a connecting frame and a hydraulic cylinder, the second driving motor is installed on the end face of the outer side of the rotating frame, the lead screw is installed on an output shaft of the second driving motor through a coupler, one end, far away from the second driving motor, of the lead screw is installed on the end face of the inner side of the rotating frame through a bearing, the lead screw is in threaded connection with the sliding block, the connecting frame is installed at the lower end of the sliding block, the hydraulic cylinder is installed on the connecting frame, a mounting seat is installed on a piston rod of the hydraulic cylinder, and a.
Furthermore, the slider is still installed on the guide post, and the both ends of guide post are all installed on the medial extremity face of swivel mount.
Furthermore, the mounting seat is further sleeved on the limiting columns, and the limiting columns arranged in parallel are all mounted on the lower surface of the connecting frame.
Further, locking mechanism includes base, expanding spring, flexible guide bar, locking plate and locking inserted bar, and the pedestal mounting is on the mount pad, and the locking plate is all installed through expanding spring and flexible guide bar at the both ends that the base is close to a side end face of mount pad, installs the locking inserted bar on the locking plate, and the locking inserted bar injects the mount pad and extends to in the side cut sword.
Furthermore, a pull rod is installed on the locking plate, penetrates through the base and is connected to a pull handle, and the pull handle is located on one side of the installation seat.
According to another aspect of the invention, an implementation method of the arc-shaped edge cutting device for stainless steel well lid production is provided, which comprises the following steps:
s10: the stainless steel well lid is placed on an operation table, the second driving motor is started and drives the screw rod to rotate, the screw rod can drive the sliding block to translate under the guiding action of the guide post in the rotating process, and the sliding block translates to enable the connecting frame and the edge cutting knife to translate along with the sliding block until the edge cutting knife moves to a proper edge cutting position;
s20: the first driving motor is started and drives the rotating frame to rotate under the guiding action of the annular guide seat, and the rotating frame rotates to enable the trimming knife to rotate along with the rotating frame;
s30: the hydraulic cylinder starts and drives the edge cutting knife to move downwards in the rotating process of the edge cutting knife, so that the rotating edge cutting knife can cut the edge of the arc-shaped edge of the stainless steel well cover in the downward moving process.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the arc-shaped trimming device for stainless steel well lid production and the implementation method thereof, the second driving motor drives the screw rod to rotate so as to enable the trimming knife to translate, after the trimming knife moves to a proper trimming position, the first driving motor drives the rotating frame and the trimming knife to rotate, and meanwhile, the hydraulic cylinder drives the trimming knife to move downwards, so that the rotating trimming knife can perform trimming operation on the arc-shaped edge of the stainless steel well lid in the downward moving process, manual trimming on the arc-shaped edge is not needed, the workload of operators can be reduced, and the arc-shaped trimming efficiency is high.
2. According to the arc-shaped trimming device for producing the stainless steel well lid and the implementation method thereof, when the trimming knife needs to be disassembled and maintained, the pull rod, the locking plate and the locking inserted rod can be driven to move through the pull handle, the telescopic spring and the telescopic guide rod are both contracted until the locking inserted rod leaves the trimming knife, and the trimming knife can be disassembled from the mounting seat because the trimming knife is not fixed by the locking inserted rod any more, so that the trimming knife is convenient to install or disassemble, and is convenient to maintain.
Drawings
FIG. 1 is a schematic view of an arc-shaped edge cutting device for stainless steel well lid production, provided by the invention;
FIG. 2 is a schematic view of the swivel mount mounting adjustment structure of the present invention;
FIG. 3 is a schematic view of the adjustment structure of the present invention with the trim knife installed;
FIG. 4 is an exploded view of the adjustment structure of the present invention with the trim knife mounted;
FIG. 5 is a schematic view of the mounting base of the present invention with the trim blade mounted thereon;
FIG. 6 is an exploded view of the mounting base of the present invention with the trim knife mounted thereon;
fig. 7 is a schematic view of the locking mechanism of the present invention.
In the figure: 1. an operation table; 2. a support frame; 21. a first drive motor; 3. a rotating frame; 31. an annular guide seat; 32. a trimming knife; 33. a guide post; 4. an adjustment structure; 41. a second drive motor; 42. a screw rod; 43. a slider; 44. a connecting frame; 441. a limiting column; 45. a hydraulic cylinder; 5. a mounting seat; 6. a locking mechanism; 61. a base; 62. a tension spring; 63. a telescopic guide rod; 64. a locking plate; 641. a pull rod; 65. locking the inserted rod; 7. pulling a handle; 8. stainless steel well lid.
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. 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.
Referring to fig. 1-2, an arc side cut device is used in production of stainless steel well lid, including operation panel 1, the last surface mounting of operation panel 1 has support frame 2, the last surface mounting of support frame 2 has first driving motor 21, the output shaft of first driving motor 21 passes support frame 2 and connects on swivel mount 3, the upper surface of swivel mount 3 is provided with annular guide holder 31, annular guide holder 31 inlays on the medial extremity face of support frame 2, be provided with side cut sword 32 on swivel mount 3, side cut sword 32 is installed on swivel mount 3 through adjusting structure 4, the below of side cut sword 32 is provided with stainless steel well lid 8, stainless steel well lid 8 places on operation panel 1.
Referring to fig. 3-4, the adjusting structure 4 includes a second driving motor 41, a lead screw 42, a slider 43, a connecting frame 44 and a hydraulic cylinder 45, the second driving motor 41 is installed on the outer end surface of the rotating frame 3, the output shaft of the second driving motor 41 is installed with the lead screw 42 through a coupling, one end of the lead screw 42 away from the second driving motor 41 is installed on the inner end surface of the rotating frame 3 through a bearing, the lead screw 42 is connected with the slider 43 in a threaded manner, the slider 43 is also installed on the guide post 33, both ends of the guide post 33 are installed on the inner end surface of the rotating frame 3, the second driving motor 41 is started and drives the lead screw 42 to rotate, the lead screw 42 can drive the slider 43 to translate under the guiding action of the guide post 33 during the rotation process, the slider 43 translates to enable the connecting frame 44 and the trimming knife 32 to translate along with the same, the trimming knife 32 translating to perform trimming operation on the arc-, the universality is wide, the trimming requirements under different conditions can be met, the lower end of the sliding block 43 is provided with the connecting frame 44, the connecting frame 44 is provided with the hydraulic cylinder 45, the piston rod of the hydraulic cylinder 45 is provided with the mounting seat 5, the mounting seat 5 is provided with the trimming knife 32 through the locking mechanism 6, the mounting seat 5 is further sleeved on the limiting post 441, the limiting posts 441 which are arranged in parallel are all arranged on the lower surface of the connecting frame 44, the stainless steel well lid 8 is placed on the operating platform 1, the second driving motor 41 is started and drives the screw rod 42 to rotate, the screw rod 42 can drive the sliding block 43 to translate under the guiding action of the guiding post 33 in the rotating process, the sliding block 43 can translate to enable the connecting frame 44 and the trimming knife 32 to translate along with the connecting frame 44 and the trimming knife 32 until the trimming knife 32 moves to a proper trimming position, the first driving motor 21 is started and drives the rotating frame 3 to rotate under the guiding action of the annular guiding seat 31, the side cut sword 32 is at rotatory in-process, and pneumatic cylinder 45 starts and drive side cut sword 32 and moves down, makes rotatory side cut sword 32 can carry out the side cut operation to the arc limit of stainless steel well lid 8 at the in-process that moves down, does not need the manual work to cut edge the arc limit, can alleviate operating personnel's work burden and make the arc cut edge efficient.
Referring to fig. 5-7, the locking mechanism 6 includes a base 61, a telescopic spring 62, a telescopic guide rod 63, a locking plate 64 and a locking inserted rod 65, the base 61 is mounted on the mounting base 5, the two ends of the base 61 near one side end surface of the mounting base 5 are respectively mounted with the locking plate 64 through the telescopic spring 62 and the telescopic guide rod 63, the locking inserted rod 65 is mounted on the locking plate 64, the locking inserted rod 65 is inserted into the mounting base 5 and extends into the trimming blade 32, a pull rod 641 is mounted on the locking plate 64, the pull rod 641 penetrates through the base 61 and is connected to the pull handle 7, the pull handle 7 is located at one side of the mounting base 5, the pull rod 641, the locking plate 64 and the locking inserted rod 65 can be driven by the pull handle 7 to move, the telescopic spring 62 and the telescopic guide rod 63 are contracted until the locking inserted rod 65 leaves the trimming blade 32, because the trimming blade 32 is no longer fixed by the locking inserted rod 65, the trimming blade 32 can be detached, the trimming knife 32 is convenient to mount or dismount and convenient to maintain.
In order to better show the implementation process of the arc-shaped edge cutting device for stainless steel well lid production, the embodiment now provides an implementation method of the arc-shaped edge cutting device for stainless steel well lid production, which includes the following steps:
s10: the stainless steel well lid 8 is placed on the operating platform 1, the second driving motor 41 is started and drives the screw rod 42 to rotate, the screw rod 42 can drive the sliding block 43 to translate under the guiding action of the guiding column 33 in the rotating process, and the sliding block 43 translates to enable the connecting frame 44 and the edge cutting knife 32 to translate along with the sliding block until the edge cutting knife 32 moves to a proper edge cutting position;
s20: the first driving motor 21 is started and drives the rotating frame 3 to rotate under the guiding action of the annular guide seat 31, and the rotating frame 3 rotates to enable the trimming knife 32 to rotate along with the rotating frame 3;
s30: in the rotating process of the trimming knife 32, the hydraulic cylinder 45 is started and drives the trimming knife 32 to move downwards, so that the rotating trimming knife 32 can perform trimming operation on the arc-shaped edge of the stainless steel well lid 8 in the downward moving process.
In summary, according to the arc-shaped trimming device for stainless steel well lid production and the implementation method thereof of the present invention, the second driving motor 41 drives the screw rod 42 to rotate so as to make the trimming knife 32 translate, after the trimming knife 32 moves to a suitable trimming position, the first driving motor 21 drives the rotating frame 3 and the trimming knife 32 to rotate, and the hydraulic cylinder 45 drives the trimming knife 32 to move downwards, so that the rotating trimming knife 32 can perform trimming operation on the arc-shaped edge of the stainless steel well lid 8 in the downward moving process, without manually trimming the arc-shaped edge, the work burden of the operator can be reduced, the arc-shaped trimming efficiency is high, when the trimming knife 32 needs to be disassembled and maintained, the pull rod 641, the locking plate 64 and the locking inserted rod 65 can be driven to move by the pull handle 7, the telescopic spring 62 and the telescopic guide rod 63 are both retracted until the locking inserted rod 65 leaves the trimming knife 32, because the trimming knife 32 is no longer fixed by the locking inserted rod 65, the trimming knife 32 can be detached from the mounting seat 5, so that the trimming knife 32 is convenient to mount or detach and convenient to maintain.
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 able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (7)
1. The utility model provides an arc side cut device is used in production of stainless steel well lid, includes operation panel (1), its characterized in that, the last surface mounting of operation panel (1) has support frame (2), the last surface mounting of support frame (2) has first driving motor (21), the output shaft of first driving motor (21) passes support frame (2) and connects on swivel mount (3), the upper surface of swivel mount (3) is provided with annular guide holder (31), inlay on the medial surface of support frame (2) annular guide holder (31), be provided with on swivel mount (3) side cut sword (32), side cut sword (32) are installed on swivel mount (3) through regulation structure (4), the below of side cut sword (32) is provided with stainless steel well lid (8), stainless steel well lid (8) are placed on operation panel (1).
2. The arc-shaped trimming device for producing the stainless steel well lid according to claim 1, adjusting structure (4) including second driving motor (41), lead screw (42), slider (43), link (44) and pneumatic cylinder (45), second driving motor (41) are installed on the outside terminal surface of swivel mount (3), lead screw (42) are installed through the shaft coupling to the output shaft of second driving motor (41), the one end that second driving motor (41) were kept away from in lead screw (42) is passed through the bearing and is installed on the medial surface of swivel mount (3), lead screw (42) threaded connection has slider (43), link (44) are installed to the lower extreme of slider (43), install pneumatic cylinder (45) on link (44), mount pad (5) are installed to the piston rod of pneumatic cylinder (45), side cut sword (32) are installed through locking mechanism (6) in mount pad (5).
3. The arc-shaped trimming device for the production of the stainless steel well lid as claimed in claim 2, wherein the sliding block (43) is further installed on a guide post (33), and both ends of the guide post (33) are installed on the inner side end surface of the rotating frame (3).
4. The arc-shaped trimming device for the production of the stainless steel well lid as claimed in claim 2, wherein the mounting seat (5) is further sleeved on the limiting columns (441), and the limiting columns (441) which are arranged in parallel are all mounted on the lower surface of the connecting frame (44).
5. The arc-shaped trimming device for the stainless steel well lid production according to claim 2, wherein the locking mechanism (6) comprises a base (61), a telescopic spring (62), a telescopic guide rod (63), a locking plate (64) and a locking inserted rod (65), the base (61) is installed on the installation seat (5), the locking plate (64) is installed at two ends, close to one side end face of the installation seat (5), of the base (61) through the telescopic spring (62) and the telescopic guide rod (63), the locking inserted rod (65) is installed on the locking plate (64), and the locking inserted rod (65) is inserted into the installation seat (5) and extends into the trimming knife (32).
6. The arc-shaped trimming device for the production of the stainless steel well lid is characterized in that a pull rod (641) is installed on the locking plate (64), the pull rod (641) penetrates through the base (61) to be connected to a pull handle (7), and the pull handle (7) is located on one side of the installation seat (5).
7. The implementation method of the arc-shaped edge cutting device for the production of the stainless steel well lid in any one of claims 1 to 6 is characterized by comprising the following steps:
s10: the stainless steel well lid (8) is placed on the operating platform (1), the second driving motor (41) is started and drives the screw rod (42) to rotate, the screw rod (42) can drive the sliding block (43) to translate under the guiding action of the guide post (33) in the rotating process, and the sliding block (43) translates to enable the connecting frame (44) and the trimming knife (32) to translate along with the screw rod until the trimming knife (32) moves to a proper trimming position;
s20: the first driving motor (21) is started and drives the rotating frame (3) to rotate under the guiding action of the annular guide seat (31), and the rotating frame (3) rotates to enable the trimming knife (32) to rotate along with the rotating frame;
s30: in the rotating process of the trimming knife (32), the hydraulic cylinder (45) is started and drives the trimming knife (32) to move downwards, so that the rotating trimming knife (32) can perform trimming operation on the arc-shaped edge of the stainless steel well cover (8) in the downward moving process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011337732.1A CN112518001A (en) | 2020-11-25 | 2020-11-25 | Arc-shaped trimming device for stainless steel well lid production and implementation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011337732.1A CN112518001A (en) | 2020-11-25 | 2020-11-25 | Arc-shaped trimming device for stainless steel well lid production and implementation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN112518001A true CN112518001A (en) | 2021-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011337732.1A Pending CN112518001A (en) | 2020-11-25 | 2020-11-25 | Arc-shaped trimming device for stainless steel well lid production and implementation method thereof |
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| CN (1) | CN112518001A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207642419U (en) * | 2017-12-12 | 2018-07-24 | 潍坊宗盛电器有限公司 | A kind of portable cutter device based on aluminium section bar |
| CN207953181U (en) * | 2018-03-12 | 2018-10-12 | 安吉科宇科技有限公司 | A kind of numerical control cutting machine beam |
| CN210789513U (en) * | 2019-10-11 | 2020-06-19 | 江苏维骏工业设备有限公司 | Cut-off machine stable in clamping |
| CN211052702U (en) * | 2019-11-22 | 2020-07-21 | 湖北正鑫铝模科技有限公司 | Aluminum alloy template cutting device with cutting angle regulatory function |
| CN211192347U (en) * | 2019-12-23 | 2020-08-07 | 江苏建筑职业技术学院 | Circular track cutting machine |
-
2020
- 2020-11-25 CN CN202011337732.1A patent/CN112518001A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207642419U (en) * | 2017-12-12 | 2018-07-24 | 潍坊宗盛电器有限公司 | A kind of portable cutter device based on aluminium section bar |
| CN207953181U (en) * | 2018-03-12 | 2018-10-12 | 安吉科宇科技有限公司 | A kind of numerical control cutting machine beam |
| CN210789513U (en) * | 2019-10-11 | 2020-06-19 | 江苏维骏工业设备有限公司 | Cut-off machine stable in clamping |
| CN211052702U (en) * | 2019-11-22 | 2020-07-21 | 湖北正鑫铝模科技有限公司 | Aluminum alloy template cutting device with cutting angle regulatory function |
| CN211192347U (en) * | 2019-12-23 | 2020-08-07 | 江苏建筑职业技术学院 | Circular track cutting machine |
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Application publication date: 20210319 |