CN109226886A - Chopping wheel positioning device and cutting machine - Google Patents
Chopping wheel positioning device and cutting machine Download PDFInfo
- Publication number
- CN109226886A CN109226886A CN201811435437.2A CN201811435437A CN109226886A CN 109226886 A CN109226886 A CN 109226886A CN 201811435437 A CN201811435437 A CN 201811435437A CN 109226886 A CN109226886 A CN 109226886A
- Authority
- CN
- China
- Prior art keywords
- plate
- rotating plate
- positioning device
- wheel positioning
- fixing piece
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- 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
- B23D47/00—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
- B23D47/04—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of devices for feeding, positioning, clamping, or rotating work
- B23D47/045—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of devices for feeding, positioning, clamping, or rotating work feeding work into engagement with the saw blade
- B23D47/047—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of devices for feeding, positioning, clamping, or rotating work feeding work into engagement with the saw blade the work being mounted on rotating work support
-
- 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
- B23D47/00—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sawing (AREA)
Abstract
The present invention relates to cutting machine manufacturing technology fields, and more particularly, to a kind of chopping wheel positioning device and cutting machine, chopping wheel positioning device includes workpiece supporting plate and rotating plate；The rotating plate is vertically installed on the workpiece supporting plate, and the swivelling chute of arc-shaped is provided on the workpiece supporting plate, and the rotating plate being capable of circumferentially rotating around the swivelling chute；It further include the fixing piece being set on the rotating plate, the fixing piece can be telescopically set on the rotating plate, for fixing article to be cut.In chopping wheel positioning device provided by the invention, by rotating plate circumferentially rotating around swivelling chute, article fixture, workpiece supporting plate and rotating plate to be cut are fixed, and can be turned to unspecified angle and be cut, and are had the advantages that high-efficient and with high accuracy.
Description
Technical field
The present invention relates to cutting machine manufacturing technology fields, more particularly, to a kind of chopping wheel positioning device and cutting machine.
Background technique
Important member one of of the Al-alloy as building materials, for making the frame of door and window, in production Al-alloy door window frame
It needs to carry out cutting processing processing to Al-alloy square stock in the process, generallys use cutting machine and Al-alloy is cut.
When Al-alloy processing needs to cut off an angle, existing cutting machine, after needing to cut a knife, by manually adjusting aluminium
The angle of golden part, is positioned using positioning device, then cuts another knife.Operating efficiency is lower in this way, and precision is not high.
In conclusion needing the angle by manually adjusting Al-alloy, there are low efficiencys and precision in existing cutting machine
Low disadvantage.
Summary of the invention
It is an object of the present invention to provide a kind of chopping wheel positioning devices, at least to solve to exist in the prior art
One of the technical issues of.
It is another object of the present invention to provide a kind of cutting machines with above-mentioned chopping wheel positioning device.
To achieve the goals above, the present invention provides following technical schemes；
The chopping wheel positioning device that first aspect present invention provides, including workpiece supporting plate and rotating plate；
The rotating plate is vertically installed on the workpiece supporting plate, and the rotation of arc-shaped is provided on the workpiece supporting plate
Slot, the rotating plate being capable of circumferentially rotating around the swivelling chute；
It further include the fixing piece being set on the rotating plate, the fixing piece can be telescopically set on the rotating plate,
For fixing article to be cut.
In chopping wheel positioning device provided by the invention, the swivelling chute of arc-shaped is provided on the workpiece supporting plate,
The rotating plate can circumferentially rotating around the swivelling chute, by rotating plate circumferentially rotating around swivelling chute, article to be cut is consolidated
Determine part, workpiece supporting plate and rotating plate to fix, unspecified angle can be turned to and cut, has high-efficient and with high accuracy excellent
Point.
In any of the above-described technical solution, further, the rotating plate bottom is provided with protrusion, and the protrusion can be stuck in
In the swivelling chute, for fixing the rotating plate.Protrusion is rotationally set convenient for rotating plate by protrusion for limiting the position of rotating plate
It sets in swivelling chute.
Swivelling chute is arranged along the surface of workpiece supporting plate, semicircular in shape.
In any of the above-described technical solution, further, the rotating plate is arranged on the workpiece supporting plate by shaft.
Rotating plate is vertically installed on workpiece supporting plate, and one end is connect by shaft with workpiece supporting plate, and the other end is existed by protrusion setting
In the swivelling chute of workpiece supporting plate.
In any of the above-described technical solution, further, screw thread is provided in the shaft, screw thread is set to the bottom of shaft
Portion, shaft are connected through a screw thread with the workpiece supporting plate.
By rotating shaft to fixed or release rotating plate, rotating shaft is to make shaft be connected and fixed with workpiece supporting plate
Or it is not connected to.
In any of the above-described technical solution, further, the fixing piece is arranged on the rotating plate by fixing axle, institute
Stating fixing piece includes the first fixing piece and the second fixing piece.Fixing axle is vertically installed in the top of the rotating plate, the fixing axle
Axis it is parallel with the axis of rotating plate.
Three fixing axles are provided on rotating plate, central fixed shaft, for fixing the second fixing piece, is set by bracket on bracket
It sets there are two the second fixing piece, the fixing axle of two sides is used to fix two the first fixing pieces by bracket.
In any of the above-described technical solution, further, first fixing piece is arranged along the axis of the rotating plate, described
Second fixing piece is arranged along the direction perpendicular to the rotating plate.
In any of the above-described technical solution, further, first fixing piece and the second fixing piece are driven by cylinder.
In any of the above-described technical solution, further includes sliding rail support plate further, be provided in the sliding rail support plate
Sliding rail, the workpiece supporting plate can be movably arranged in the sliding rail support plate by the sliding rail.
In any of the above-described technical solution, further includes cross-brace plate further, be provided on the cross-brace plate
Cross slide way, the sliding rail support plate can be movably arranged on the cross-brace plate.
Second aspect of the present invention provides a kind of cutting machine, positions including chopping wheel described in any of the above-described technical solution
Device；
The cutting machine that second aspect of the present invention provides is provided with the chopping wheel positioning device of first aspect offer, therefore
Whole beneficial effects with the chopping wheel positioning device that first aspect provides, just do not repeat one by one herein.
By adopting the above technical scheme, the invention has the following beneficial effects:
In chopping wheel positioning device provided by the invention, the swivelling chute of arc-shaped is provided on the workpiece supporting plate,
The rotating plate can circumferentially rotating around the swivelling chute, by rotating plate circumferentially rotating around swivelling chute, article to be cut is consolidated
Determine part, workpiece supporting plate and rotating plate to fix, unspecified angle can be turned to and cut, has high-efficient and with high accuracy excellent
Point.
Further, the rotating plate bottom is provided with protrusion, and the protrusion can be stuck in the swivelling chute, for fixing
The rotating plate.
Further, it is provided with screw thread in the shaft, is connected through a screw thread with the workpiece supporting plate.
Additional aspect and advantage of the invention will become obviously in following description section, or practice through the invention
Recognize.
Detailed description of the invention
It below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the positive structure schematic of chopping wheel positioning device provided in an embodiment of the present invention；
Fig. 2 is the structure schematic diagram of chopping wheel positioning device provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of positioning device and saw head in chopping wheel positioning device provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of cutting machine provided in an embodiment of the present invention.
Appended drawing reference:
1- shell；10- first saws head；11- second saws head；12- positioning device；13- rack；20- workpiece supporting plate；21-
Sliding rail support plate；22- swivelling chute；23- rotating plate；24- fixing axle；25- sliding rail；26- cross-brace plate；27- cross slide way；29-
Shaft；The first fixing piece of 30-；The second fixing piece of 31-.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
It should be noted that in the absence of conflict, the feature in embodiments herein and embodiment can be combined with each other.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
Below with reference to specific embodiment the present invention will be further explained explanation.
Fig. 1 is the positive structure schematic of chopping wheel positioning device provided in an embodiment of the present invention；Fig. 2 is that the present invention is real
The structure schematic diagram of the chopping wheel positioning device of example offer is provided；Fig. 3 is fixed for chopping wheel provided in an embodiment of the present invention
The structural schematic diagram of positioning device and saw head in the device of position；Fig. 4 is the structural schematic diagram of cutting machine provided in an embodiment of the present invention.
Embodiment one
As shown in Figures 1 to 4, chopping wheel positioning device provided in this embodiment, including workpiece supporting plate 20 and rotating plate
23；
The rotating plate 23 is vertically installed on the workpiece supporting plate 20, is provided with circular arc on the workpiece supporting plate 20
The swivelling chute 22 of shape, the rotating plate 23 being capable of circumferentially rotating around the swivelling chute 22；
It further include the fixing piece being set on the rotating plate 23, the fixing piece can telescopically be set to the rotating plate 23
On, for fixing article to be cut.
In chopping wheel positioning device provided by the invention, the swivelling chute of arc-shaped is provided on the workpiece supporting plate 20
22, the rotating plate 23 can circumferentially rotating around the swivelling chute 22, it is to be cut by the circumferentially rotating around swivelling chute 22 of rotating plate 23
It cuts article fixture, workpiece supporting plate 20 and rotating plate 23 to fix, unspecified angle can be turned to and cut, there is efficiency
Advantage high and with high accuracy.
In any of the above-described technical solution, further, 23 bottom of rotating plate is provided with protrusion, and the protrusion can block
In the swivelling chute 22, for fixing the rotating plate 23.Protrusion passes through convex for limiting the position of rotating plate 23 convenient for rotating plate 23
It rises and is rotatably arranged in swivelling chute 22.
Swivelling chute 22 is arranged along the surface of workpiece supporting plate 20, semicircular in shape.
In any of the above-described technical solution, further, the rotating plate 23 is arranged by shaft 29 in the workpiece support
On plate 20.Rotating plate 23 is vertically installed on workpiece supporting plate 20, and one end is connect by shaft 29 with workpiece supporting plate 20, the other end
It is arranged in the swivelling chute 22 of workpiece supporting plate 20 by protrusion.
In any of the above-described technical solution, further, screw thread is provided in the shaft 29, screw thread is set to shaft 29
Bottom, shaft 29 is connected through a screw thread with the workpiece supporting plate 20.
By rotating shaft 29 to fixed or release rotating plate 23, rotating shaft 29 is to make shaft 29 and workpiece supporting plate
20 are connected and fixed or are not connected to.
In any of the above-described technical solution, further, the fixing piece is arranged by fixing axle 24 in the rotating plate 23
On, the fixing piece includes the first fixing piece 30 and the second fixing piece 31.Fixing axle 24 is vertically installed in the top of the rotating plate 23
The axis in portion, the fixing axle 24 is parallel with the axis of rotating plate 23.
Three fixing axles 24 are provided on rotating plate 23, central fixed shaft 24 is used to fix the second fixing piece 31 by bracket,
There are two the second fixing pieces 31 for setting on bracket, and the fixing axle 24 of two sides is by bracket for fixing two the first fixing pieces 30.
In any of the above-described technical solution, further, first fixing piece 30 is arranged along the axis of the rotating plate 23,
Second fixing piece 31 is along the direction setting perpendicular to the rotating plate 23.
In any of the above-described technical solution, further, first fixing piece 30 and the second fixing piece 31 are by cylinder
It drives.Fixing piece is connect by fixed block with fixing axle 24, and fixing piece includes fixing head, and fixing head can telescopically be arranged in solid
Determine on block.
In any of the above-described technical solution, further includes sliding rail support plate 21 further, set in the sliding rail support plate 21
It is equipped with sliding rail 25, the workpiece supporting plate 20 can be movably arranged in the sliding rail support plate 21 by the sliding rail 25.
Workpiece supporting plate 20 and sliding rail support plate 21 are arranged in parallel, and workpiece supporting plate 20 can be by sliding rail 25 along front and back
To being movably arranged in sliding rail support plate 21.
In any of the above-described technical solution, further includes cross-brace plate 26 further, set on the cross-brace plate 26
It is equipped with cross slide way 27, the sliding rail support plate 21 can be movably arranged on the cross-brace plate 26.
Sliding rail support plate 21 and cross-brace plate 26 are arranged in parallel, and sliding rail support plate 21 is by cross slide way 27 along right and left
To being movably arranged on cross-brace plate 26.
Second aspect of the present invention provides a kind of cutting machine, positions including chopping wheel described in any of the above-described technical solution
Device；
The cutting machine that second aspect of the present invention provides is provided with the chopping wheel positioning device of first aspect offer, therefore
Whole beneficial effects with the chopping wheel positioning device that first aspect provides, just do not repeat one by one herein.
Cutting machine further include corresponding to positioning device 12 (including workpiece supporting plate and rotating plate) setting saw head, saw head with
Motor connection drives saw head rotation.Saw head include first saw head 10 and second saw head 11, first saw head 10 with second saw head 11 it
Between angle it is adjustable.
It saws head to be arranged on column by shaft 29, is provided with sliding rail in the rack 13 of column bottom, column passes through sliding rail
It moves in the horizontal direction, completes cutting.
It is provided with shell 1 outside entire positioning device 12, operates artificial safety for protecting.
Chopping wheel positioning device provided by the invention is in use, the edge rotation on workpiece supporting plate 20 by protrusion of rotating plate 23
Turn trough 22 rotates, and the position of 23 inward direction of rotating plate is provided with limit plate, and limit plate is used to Al-alloy being connected to limit plate,
For limiting.
When processing, Al-alloy right part is connected on rotating plate 23, and inward-outward direction is connected on limit plate, and lower section is connected to workpiece
In support plate 20, the left side is fixed by the second fixing piece 31, and top is fixed by the first fixing piece 30, after entire Al-alloy is fixed
Using saw head cutting.
There are two sawing head, the angles between two saw heads are also configured as adjustable for the saw head of the cutting machine point, saw and connect on head
Driving structure, driving structure drive saw head transverse shifting, and saw head is from left to right completed workpiece and cut at angle.Saw head passes through shaft
29 adjust the angle, and are provided with sensor in shaft 29, and sensor is connect with angle display, and sensor will after detecting shaft 29
Angle is shown on angle display, and cooperation variable-frequency motor completes feed.
In conclusion being provided with arc-shaped on the workpiece supporting plate in chopping wheel positioning device provided by the invention
Swivelling chute, the rotating plate can circumferentially rotating around the swivelling chute, it is to be cut by rotating plate circumferentially rotating around swivelling chute
Article fixture, workpiece supporting plate and rotating plate are fixed, and can be turned to unspecified angle and be cut, and are had high-efficient and smart
Spend high advantage.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.In addition, it will be appreciated by those of skill in the art that although some embodiments described herein include other implementations
Certain features rather than other feature included by example, but the combination of the feature of different embodiments means in the present invention
Within the scope of and form different embodiments.For example, in claims above, embodiment claimed
It is one of any can in any combination mode come using.The information disclosed in the background technology section is intended only to deepen pair
The understanding of general background technology of the invention, and be not construed as recognizing or implying in any form that information composition has been this
The prior art well known to the technical staff of field.
Claims (10)
1. a kind of chopping wheel positioning device, which is characterized in that including workpiece supporting plate and rotating plate；
The rotating plate is vertically installed on the workpiece supporting plate, and the swivelling chute of arc-shaped is provided on the workpiece supporting plate,
The rotating plate being capable of circumferentially rotating around the swivelling chute；
It further include the fixing piece being set on the rotating plate, the fixing piece can telescopically be set on the rotating plate, be used for
Fixed article to be cut.
2. chopping wheel positioning device according to claim 1, which is characterized in that
The rotating plate bottom is provided with protrusion, and the protrusion can be stuck in the swivelling chute, for fixing the rotating plate.
3. chopping wheel positioning device according to claim 1, which is characterized in that
The rotating plate is arranged on the workpiece supporting plate by shaft.
4. chopping wheel positioning device according to claim 3, which is characterized in that it is provided with screw thread in the shaft, with
The workpiece supporting plate is connected through a screw thread.
5. chopping wheel positioning device according to claim 1, which is characterized in that
The fixing piece is arranged on the rotating plate by fixing axle, and the fixing piece includes that the first fixing piece and second are fixed
Part.
6. chopping wheel positioning device according to claim 5, which is characterized in that
First fixing piece is arranged along the axis of the rotating plate, and second fixing piece is set along the direction perpendicular to the rotating plate
It sets.
7. chopping wheel positioning device according to claim 6, which is characterized in that
First fixing piece and the second fixing piece are driven by cylinder.
8. chopping wheel positioning device according to claim 1, which is characterized in that
Further include sliding rail support plate, sliding rail is provided in the sliding rail support plate, the workpiece supporting plate passes through the sliding rail energy
It is enough movably arranged in the sliding rail support plate.
9. chopping wheel positioning device according to claim 8, which is characterized in that
Further include cross-brace plate, cross slide way is provided on the cross-brace plate, the sliding rail support plate can be movably
It is arranged on the cross-brace plate.
10. a kind of cutting machine, which is characterized in that include chopping wheel positioning dress as claimed in any one of claims 1-9 wherein
It sets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811435437.2A CN109226886A (en) | 2018-11-28 | 2018-11-28 | Chopping wheel positioning device and cutting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811435437.2A CN109226886A (en) | 2018-11-28 | 2018-11-28 | Chopping wheel positioning device and cutting machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109226886A true CN109226886A (en) | 2019-01-18 |
Family
ID=65074334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811435437.2A Pending CN109226886A (en) | 2018-11-28 | 2018-11-28 | Chopping wheel positioning device and cutting machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109226886A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113000923A (en) * | 2021-03-03 | 2021-06-22 | 黄欢娣 | Water-conservancy steel pipe cutting device and using method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR930006390U (en) * | 1991-09-17 | 1993-04-23 | 세이고 구리하라 | Core type stone cutting machine |
| EP1245319A2 (en) * | 2001-03-29 | 2002-10-02 | ROTOX GmbH B. EISENBACH | Rotary stand for circular saw |
| KR20120090437A (en) * | 2011-02-08 | 2012-08-17 | 이대원 | Frame cutting machine |
| CN205519904U (en) * | 2016-01-15 | 2016-08-31 | 苏州宝时得电动工具有限公司 | Cast -cutting saw |
| CN108705147A (en) * | 2018-07-25 | 2018-10-26 | 太仓威格玛机械设备有限公司 | Large-scale tenon saw |
| CN209349607U (en) * | 2018-11-28 | 2019-09-06 | 广东海富纳数控科技有限公司 | Chopping wheel positioning device and cutting machine |
-
2018
- 2018-11-28 CN CN201811435437.2A patent/CN109226886A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR930006390U (en) * | 1991-09-17 | 1993-04-23 | 세이고 구리하라 | Core type stone cutting machine |
| EP1245319A2 (en) * | 2001-03-29 | 2002-10-02 | ROTOX GmbH B. EISENBACH | Rotary stand for circular saw |
| KR20120090437A (en) * | 2011-02-08 | 2012-08-17 | 이대원 | Frame cutting machine |
| CN205519904U (en) * | 2016-01-15 | 2016-08-31 | 苏州宝时得电动工具有限公司 | Cast -cutting saw |
| CN108705147A (en) * | 2018-07-25 | 2018-10-26 | 太仓威格玛机械设备有限公司 | Large-scale tenon saw |
| CN209349607U (en) * | 2018-11-28 | 2019-09-06 | 广东海富纳数控科技有限公司 | Chopping wheel positioning device and cutting machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113000923A (en) * | 2021-03-03 | 2021-06-22 | 黄欢娣 | Water-conservancy steel pipe cutting device and using method thereof |
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