CN206215803U - A kind of three-dimensional internally finned tube shaped device that extruding is cut based on multiple-cutting-edge plough - Google Patents
A kind of three-dimensional internally finned tube shaped device that extruding is cut based on multiple-cutting-edge plough Download PDFInfo
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- CN206215803U CN206215803U CN201621210930.0U CN201621210930U CN206215803U CN 206215803 U CN206215803 U CN 206215803U CN 201621210930 U CN201621210930 U CN 201621210930U CN 206215803 U CN206215803 U CN 206215803U
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- cutting
- connecting rod
- metal tube
- inner fin
- feed mechanism
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- 230000007246 mechanism Effects 0.000 claims abstract description 61
- 239000002184 metal Substances 0.000 claims abstract description 46
- 229910052751 metal Inorganic materials 0.000 claims abstract description 46
- 238000000465 moulding Methods 0.000 claims abstract description 20
- 210000000078 claw Anatomy 0.000 claims description 6
- 238000003780 insertion Methods 0.000 claims description 5
- 230000037431 insertion Effects 0.000 claims description 5
- 238000012546 transfer Methods 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 4
- 230000003014 reinforcing effect Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000003416 augmentation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The utility model discloses a kind of three-dimensional internally finned tube shaped device that extruding is cut based on multiple-cutting-edge plough；Head, supporting mechanism, axial feed mechanism and inner fin molding cutter component that device includes frame, can provide rotary power；Head, supporting mechanism and axial feed mechanism are axially mounted in frame successively；Inner fin molding cutter component is arranged in axial feed mechanism；Metal tube one end of three-dimensional inner fin to be processed is clamped on the chuck of head rotating main shaft, and the other end is placed on supporting mechanism；The live spindle of head provides rotary power for metal tube, and axial feed mechanism drives inner fin molding cutter component to be moved linearly along the axis of metal tube and inner fin molding cutter component.The three-dimensional discrete inner fin structure processed using the present apparatus, it is big with the contact area of working medium, increased the flow-disturbing effect to working medium, and heat transfer surface area is big, increases heat transfer coefficient, can effectively improve the heat transfer efficiency of reinforcing heat pipe.
Description
Technical field
The utility model is related to fin manufacturing technique, more particularly to a kind of three-dimensional cut-extruded based on multiple-cutting-edge plough
Internally finned tube shaped device.
Background technology
With continuing to develop for society, the problem of energy shortage is increasingly serious.Heat transfer enhancement technology is used as important energy-conservation
Approach, has great importance for solving energy problem, has been obtained extensively in fields such as oil, chemical industry, power, nuclear energy, refrigeration
General application.Heat exchanger tube is the crucial heat transfer element used in heat transfer enhancement technology, is primarily characterized in that the interior appearance in pipe
Face processes certain surface texture, to extend heat-transfer area or improve heat transfer coefficient, so as to improve heat transfer efficiency.
Based on external finned tube, its inwall is generally hydraulically smooth surface, internal thread to the heat exchanger tube that current heat transfer enhancement technology is used
Groove or straight-tooth groove.Hydraulically smooth surface, internal thread groove or straight-tooth groove are limited for extension heat-transfer area effect.Additionally,
Internal thread groove or straight-tooth groove are more regular due to fin structure, the corresponding comparison rule of its extended surface, the out-of-date side of fluid stream
The destructiveness of interlayer is limited, it is impossible to form effective perturbation action, and the raising for augmentation of heat transfer coefficient is limited.Therefore, it is interior
Wall is the heat exchange external finned tube of hydraulically smooth surface, internal thread groove or straight-tooth groove, it is difficult to obtain heat transfer efficiency higher.
The content of the invention
The purpose of this utility model is the shortcoming and defect for overcoming above-mentioned prior art, there is provided a kind of simple structure, behaviour
Make the three-dimensional internally finned tube shaped device easily cut-extrude based on multiple-cutting-edge plough.There is three-dimensional discontinuous inner fin knot to obtain
The heat exchanger tube of structure, further improves the contact area of heat exchanger tube inner fins and working medium, improves heat exchange efficiency.
The utility model is achieved through the following technical solutions：
It is a kind of based on the multiple-cutting-edge plough three-dimensional internally finned tube shaped device cutting-extrude, including frame 1, rotary power can be provided
Head 3, supporting mechanism 4, axial feed mechanism 5 and inner fin molding cutter component；
The head 3, supporting mechanism 4 and axial feed mechanism 5 are axially mounted in frame 1 successively；The inner fin into
Type toolbox is arranged in axial feed mechanism 5；
One end of metal tube 7 of three-dimensional inner fin to be processed is clamped on the chuck of the live spindle of head 3, and the other end is placed in branch
On support mechanism 4；The axis of metal tube 7 and the axis coaxle of inner fin molding cutter component；The live spindle of head 3 is metal tube
7 provide rotary power, and axial feed mechanism 5 drives inner fin molding cutter component along metal tube 7 and inner fin molding cutter
The axis rectilinear movement of component.
The supporting mechanism 4 includes a support 4-1, and one is offered on support 4-1 is used to place the station 4-4 of metal tube 7,
Three clamping cylinder 4-2 are symmetrically distributed with support 4-1 bodies, the pistons end of each clamping cylinder 4-2 is provided with claw
The end of 4-3, claw 4-3 is provided with rotatable roller 4-3a；Roller 4-3a is symmetrically distributed in around station 4-4, works as gold
Category pipe 7 is placed in when in station 4-4, and roller 4-3a is rotated with the perisporium of metal tube 7 and contacted, and is that the metal tube 7 in rotary motion is carried
For support and positioning.
The inner fin molding cutter component includes multiple-cutting-edge tool 6-4, knife bar 6-3 and connecting rod 6-2；The multiple-cutting-edge tool
6-4 is fixedly mounted on one end of knife bar 6-3, the end of the other end insertion connecting rod 6-2 of knife bar 6-3；Connecting rod 6-2 afterbodys are consolidated
Dingan County is in axial feed mechanism 5.
The axial feed mechanism 5 is screw mandrel feed mechanism, and it includes screw mandrel and the sliding block on screw mandrel；Work as screw mandrel
During rotation, band movable slider axial movement；The connecting rod 6-2 is fixed on sliding block.
The body of rod of the knife bar 6-3 is provided with raised line 6-5, and connecting rod 6-2 ends are tubular structure, and interior is cased with a ring-type
Permanent magnet 6-1, the connecting rod 6-2 end are provided with a draw-in groove 6-6 being adapted with raised line 6-5；When connecting rod 6-2 inserts connecting rod
When in 6-2, raised line 6-5 and draw-in groove 6-6 limitations knife bar 6-3 is circumferentially rotated relative to connecting rod 6-2；By the magnetic of annular permanent magnets
Power is acted on, and knife bar 6-3 is pull-in on connecting rod 6-2.
The multiple-cutting-edge tool 6-4 is fixed on the end of connecting rod 6-2 by nut.
The blade 6-6 of the multiple-cutting-edge tool 6-4 is identical pyramidal structure, and its taper is 10 °~30 °；The blade
6-6 is symmetrically distributed in around annular base.The left side of the head 3 is additionally provided with one and takes cutter mechanism 2 for take knife, its bag
Include cylinder 2-2, be arranged on the pneumatic chuck 2-3 of cylinder 2-2 pistons ends；When pneumatic chuck 2-3 clamps the end of knife bar 6-3
Afterwards, the piston retraction of cylinder 2-2, and then knife bar 6-3 is axially taken out from connecting rod 6-2.
A kind of three-dimensional internally finned tube forming method, it comprises the following steps：
Step one：Metal tube 7 with female thread structure is axially located in the station 4-4 of supporting mechanism 4, its end is consolidated
It is scheduled on the chuck of the live spindle of head 3, and keeps metal tube 7 with multiple-cutting-edge tool 6-4 on same axis；
Step 2：The live spindle of head 3 drives metal tube 7 to rotate；
Step 3：Axial feed mechanism 5 starts, and axial feed mechanism 5 drives multiple-cutting-edge tool 6-4 to connect to the direction of metal tube 7
Continuous axial movement；Multiple-cutting-edge tool 6-4 enters in metal tube 7, and multiple blade 6-6 of multiple-cutting-edge tool 6-4 are cut in metal tube 7 simultaneously
The female thread structure bossing of wall, makes it be divided into front and rear two parts, and the arcuate blade plough of blade 6-6 is cut, and knife face is same after taper
When the groove that is cut to it outwardly against, expand groove, form the three-dimensional discrete interior wing higher than internal thread bossing
Chip architecture；
Step 4：The continuous feed of axial feed mechanism 5, until the internal face in whole metal tube 7 forms three-dimensional discontinuous
Inner fin structure.
The internal face of metal tube 7 is formed after the completion of three-dimensional discrete inner fin structure, and now, multiple-cutting-edge tool 6-4 stretches out
Simultaneously expose the end of metal tube 7；Head 3 stops the rotation, the feed-disabling of axial feed mechanism 5；Take the pneumatic chuck 2- of cutter mechanism 2
Behind 3 ends for clamping knife bar 6-3, the piston retraction of cylinder 2-2, and then knife bar 6-3 is axially taken out from connecting rod 6-2；Axle
To the counter motion of feed mechanism 5, initial position is returned to.
The utility model has the following advantages and effect relative to prior art：
1. it is engaged with multiple-cutting-edge tool using axial feed mechanism, multiple blades of multiple-cutting-edge tool are cut in metal tube simultaneously
The female thread structure bossing of wall, makes it be divided into front and rear two parts, and the rake face plough of blade is cut, and rear knife face is cut to it simultaneously
The groove opened outwardly against, expand groove, formed higher than internal thread bossing three-dimensional discrete inner fin structure；Should
The finned tube of inner fin structure is planted, it is big with the specific surface area of working medium, increased the flow-disturbing effect to working medium, heat transfer surface area
Greatly, heat transfer coefficient is increased, the heat transfer efficiency of reinforcing heat pipe can be effectively improved.
The utility model can effectively improve the processing efficiency of finned tube using the processing technology of multiple-cutting-edge.
The body of rod of the utility model knife bar is provided with raised line, and connection boom end is tubular structure, and interior is cased with a ring-type forever
Magnet, the connection boom end is provided with a draw-in groove being adapted with raised line；When in connecting rod insertion connecting rod, raised line and draw-in groove are limited
Knife bar processed is circumferentially rotated relative to connection；By the magneticaction of annular permanent magnets, knife bar is pull-in in connecting rod.It is this to pull out
Formula and magnetic attraction connected mode are inserted, easy installation and removal is quick, is used cooperatively with cutter mechanism is taken, and effectively reduces the clamping time,
Improve production efficiency, reduces production cost.
Brief description of the drawings
Fig. 1 is that the utility model is based on the three-dimensional internally finned tube shaped device structural representation that multiple-cutting-edge plough is cut-extruded.
Fig. 2 is the supporting mechanism partial structural diagram of metal tube 7.
Fig. 3 is inner fin molding cutter component partial structural diagram.
Fig. 4 is multiple-cutting-edge tool partial structural diagram.
Fig. 5 is to take cutter mechanism partial structural diagram.
Specific embodiment
The utility model is more specifically described in detail with reference to specific embodiment.
Embodiment
As shown in Figures 1 to 4.The utility model discloses a kind of three-dimensional internally finned tube shaping cut-extrude based on multiple-cutting-edge plough
Device, including frame 1, head 3, supporting mechanism 4, axial feed mechanism 5 and inner fin molding cutter that rotary power can be provided
Component；
The head 3, supporting mechanism 4 and axial feed mechanism 5 are axially mounted in frame 1 successively；The inner fin into
Type toolbox is arranged in axial feed mechanism 5；
One end of metal tube 7 of three-dimensional inner fin to be processed is clamped on the chuck of the live spindle of head 3, and the other end is placed in branch
On support mechanism 4；The axis of metal tube 7 and the axis coaxle of inner fin molding cutter component；The live spindle of head 3 is metal tube
7 provide rotary power, and axial feed mechanism 5 drives inner fin molding cutter component along metal tube 7 and inner fin molding cutter
The axis rectilinear movement of component.
The supporting mechanism 4 includes a support 4-1, and one is offered on support 4-1 is used to place the station 4-4 of metal tube 7,
Three clamping cylinder 4-2 are symmetrically distributed with support 4-1 bodies, the pistons end of each clamping cylinder 4-2 is provided with claw
The end of 4-3, claw 4-3 is provided with rotatable roller 4-3a；Roller 4-3a is symmetrically distributed in around station 4-4, works as gold
Category pipe 7 is placed in when in station 4-4, and roller 4-3a is rotated with the perisporium of metal tube 7 and contacted, and is that the metal tube 7 in rotary motion is carried
For support and positioning.
The inner fin molding cutter component includes multiple-cutting-edge tool 6-4, knife bar 6-3 and connecting rod 6-2；The multiple-cutting-edge tool
6-4 is fixedly mounted on one end of knife bar 6-3, the end of the other end insertion connecting rod 6-2 of knife bar 6-3；Connecting rod 6-2 afterbodys are consolidated
Dingan County is in axial feed mechanism 5.
The axial feed mechanism 5 is screw mandrel feed mechanism, and it includes screw mandrel and the sliding block on screw mandrel；Work as screw mandrel
During rotation, band movable slider axial movement；The connecting rod 6-2 is fixed on sliding block.
The body of rod of the knife bar 6-3 is provided with raised line 6-5, and connecting rod 6-2 ends are tubular structure, and interior is cased with a ring-type
Permanent magnet 6-1, the connecting rod 6-2 end are provided with a draw-in groove 6-6 being adapted with raised line 6-5；When connecting rod 6-2 inserts connecting rod
When in 6-2, raised line 6-5 and draw-in groove 6-6 limitations knife bar 6-3 is circumferentially rotated relative to connecting rod 6-2；By the magnetic of annular permanent magnets
Power is acted on, and knife bar 6-3 is pull-in on connecting rod 6-2.
The multiple-cutting-edge tool 6-4 is fixed on the end of connecting rod 6-2 by nut.
The blade 6-6 of the multiple-cutting-edge tool 6-4 is identical pyramidal structure, and its taper is generally 10 °~30 °；It is described
Blade 6-6 is symmetrically distributed in around annular base.Depending on the quantity and taper of blade 6-6 can be according to processing requests.
The left side of the head 3 is additionally provided with one and takes cutter mechanism 2 for take knife, and it includes cylinder 2-2, is arranged on cylinder
The pneumatic chuck 2-3 of 2-2 pistons ends；After pneumatic chuck 2-3 clamps the end of knife bar 6-3, the piston of cylinder 2-2 is returned
Contracting, and then knife bar 6-3 is axially taken out from connecting rod 6-2.
The utility model three-dimensional internally finned tube forming method, can be achieved by the steps of：
Step one：Metal tube 7 with female thread structure is axially located in the station 4-4 of supporting mechanism 4, its end is consolidated
It is scheduled on the chuck of the live spindle of head 3, and keeps metal tube 7 with multiple-cutting-edge tool 6-4 on same axis；Need explanation
It is that the hand of spiral of the internal thread of metal tube 7 can be identical with multiple-cutting-edge tool 6-4 directions of feed, it is also possible to not conversely, specific root
Depending on practical application.
Step 2：The live spindle of head 3 drives metal tube 7 to rotate；
Step 3：Axial feed mechanism 5 starts, and axial feed mechanism 5 drives multiple-cutting-edge tool 6-4 to connect to the direction of metal tube 7
Continuous axial movement；Multiple-cutting-edge tool 6-4 enters in metal tube 7, and multiple blade 6-6 of multiple-cutting-edge tool 6-4 are cut in metal tube 7 simultaneously
The female thread structure bossing of wall, makes it be divided into front and rear two parts, and the arcuate blade plough of blade 6-6 is cut, and knife face is same after taper
When the groove that is cut to it outwardly against, expand groove, form the three-dimensional discrete interior wing higher than internal thread bossing
Chip architecture；
Step 4：The continuous feed of axial feed mechanism 5, until the internal face in whole metal tube 7 forms three-dimensional discontinuous
Inner fin structure.
Take knife step as follows：
One：The internal face of metal tube 7 is formed after the completion of three-dimensional discrete inner fin structure, and now, multiple-cutting-edge tool 6-4 stretches
Go out the end of metal tube 7 and expose；
Two：Head 3 stops the rotation, the feed-disabling of axial feed mechanism 5；
Three：After taking the end of pneumatic chuck 2-3 clamping knife bars 6-3 of cutter mechanism 2, the piston retraction of cylinder 2-2, and then will
Knife bar 6-3 axially takes out from connecting rod 6-2；
Four：The counter motion of axial feed mechanism 5, returns to initial position.
As described above, just can preferably realize the utility model.
Implementation method of the present utility model is simultaneously not restricted to the described embodiments, and other are any without departing from of the present utility model
Spirit Essence and the change, modification, replacement made under principle, combine, simplify, should be equivalent substitute mode, being included in
Within protection domain of the present utility model.
Claims (8)
- It is 1. a kind of that the three-dimensional internally finned tube shaped device cut-extrude is ploughed based on multiple-cutting-edge, it is characterised in that：Including frame (1), can carry Head (3), supporting mechanism (4), axial feed mechanism (5) and inner fin molding cutter component for rotary power；The head (3), supporting mechanism (4) and axial feed mechanism (5) are axially mounted in frame (1) successively；The interior wing Sheetmolding toolbox is arranged in axial feed mechanism (5)；Metal tube (7) one end of three-dimensional inner fin to be processed is clamped on the chuck of head (3) live spindle, and the other end is placed in branch On support mechanism (4)；The axis of metal tube (7) and the axis coaxle of inner fin molding cutter component；The live spindle of head (3) is Metal tube (7) provide rotary power, axial feed mechanism (5) drive inner fin molding cutter component along metal tube (7) with it is interior The axis rectilinear movement of fin molding cutter component.
- 2. the three-dimensional internally finned tube shaped device cut-extrude based on multiple-cutting-edge plough according to claim 1, it is characterised in that：Institute Stating supporting mechanism (4) includes a support (4-1), and one is offered on support (4-1) is used to place the station (4-4) of metal tube (7), Three clamping cylinders (4-2) are symmetrically distributed with support (4-1) body, the pistons end of each clamping cylinder (4-2) is installed The end for having claw (4-3), claw (4-3) is provided with rotatable roller (4-3a)；Roller (4-3a) is symmetrically distributed in station Around (4-4), when metal tube (7) be placed in station (4-4) it is interior when, the perisporium of roller (4-3a) and metal tube (7) is rotated and contacted, For the metal tube (7) in rotary motion provides support with positioning.
- 3. the three-dimensional internally finned tube shaped device cut-extrude based on multiple-cutting-edge plough according to claim 1, it is characterised in that：Institute Stating inner fin molding cutter component includes multiple-cutting-edge tool (6-4), knife bar (6-3) and connecting rod (6-2)；Multiple-cutting-edge tool (the 6- 4) one end of knife bar (6-3), the end of other end insertion connecting rod (6-2) of knife bar (6-3) are fixedly mounted on；Connecting rod (6- 2) afterbody is fixedly mounted in axial feed mechanism (5).
- 4. the three-dimensional internally finned tube shaped device cut-extrude based on multiple-cutting-edge plough according to claim 3, it is characterised in that：Institute It is screw mandrel feed mechanism to state axial feed mechanism (5), and it includes screw mandrel and the sliding block on screw mandrel；When screw mandrel is rotated, Band movable slider axial movement；The connecting rod (6-2) is fixed on sliding block.
- 5. the three-dimensional internally finned tube shaped device cut-extrude based on multiple-cutting-edge plough according to claim 3, it is characterised in that：Institute The body of rod for stating knife bar (6-3) is provided with raised line (6-5), and connecting rod (6-2) end is tubular structure, and interior is cased with an annular permanent-magnet Body (6-1), connecting rod (6-2) end is provided with a draw-in groove (6-6) being adapted with raised line (6-5)；When connecting rod (6-2) insertion When connecting rod (6-2) is interior, raised line (6-5) and draw-in groove (6-6) limit knife bar (6-3) and are circumferentially rotated relative to connecting rod (6-2)；It is logical The magneticaction of annular permanent magnets is crossed, knife bar (6-3) is pull-in in connecting rod (6-2).
- 6. the three-dimensional internally finned tube shaped device cut-extrude based on multiple-cutting-edge plough according to claim 5, it is characterised in that：Institute State the end that multiple-cutting-edge tool (6-4) is fixed on connecting rod (6-2) by nut.
- 7. the three-dimensional internally finned tube shaped device cut-extrude based on multiple-cutting-edge plough according to any one of claim 3 to 6, its It is characterised by：The blade (6-6) of the multiple-cutting-edge tool (6-4) is identical pyramidal structure, and its taper is 10 °~30 °；It is described Blade (6-6) is symmetrically distributed in around annular base.
- 8. the three-dimensional internally finned tube shaped device cut-extrude based on multiple-cutting-edge plough according to claim 7, it is characterised in that：Institute State and one is additionally provided with the left of head (3) takes cutter mechanism (2) for take knife, it includes cylinder (2-2), is arranged on cylinder (2- 2) pneumatic chuck (2-3) of pistons end；After pneumatic chuck (2-3) clamps the end of knife bar (6-3), cylinder (2-2) Piston is bounced back, and then knife bar (6-3) is axially taken out from connecting rod (6-2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621210930.0U CN206215803U (en) | 2016-11-10 | 2016-11-10 | A kind of three-dimensional internally finned tube shaped device that extruding is cut based on multiple-cutting-edge plough |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621210930.0U CN206215803U (en) | 2016-11-10 | 2016-11-10 | A kind of three-dimensional internally finned tube shaped device that extruding is cut based on multiple-cutting-edge plough |
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| Publication Number | Publication Date |
|---|---|
| CN206215803U true CN206215803U (en) | 2017-06-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621210930.0U Expired - Fee Related CN206215803U (en) | 2016-11-10 | 2016-11-10 | A kind of three-dimensional internally finned tube shaped device that extruding is cut based on multiple-cutting-edge plough |
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| Country | Link |
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| CN (1) | CN206215803U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106391913A (en) * | 2016-11-10 | 2017-02-15 | 华南理工大学 | Device and method for forming three-dimensional internal finned tubes based on multi-blade ploughing-extrusion |
-
2016
- 2016-11-10 CN CN201621210930.0U patent/CN206215803U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106391913A (en) * | 2016-11-10 | 2017-02-15 | 华南理工大学 | Device and method for forming three-dimensional internal finned tubes based on multi-blade ploughing-extrusion |
| WO2018086528A1 (en) * | 2016-11-10 | 2018-05-17 | 华南理工大学 | Device and method for forming three-dimensional internally finned pipe based on multiple-blade ploughing and extrusion |
| US10807145B2 (en) | 2016-11-10 | 2020-10-20 | South China University Of Technology | Device and method for forming inside three-dimensional finned tube by multi-edge ploughing and extruding |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170606 |