CN108381369A - A kind of tubing polishing machine with self-feeding and discharging - Google Patents
A kind of tubing polishing machine with self-feeding and discharging Download PDFInfo
- Publication number
- CN108381369A CN108381369A CN201810353542.5A CN201810353542A CN108381369A CN 108381369 A CN108381369 A CN 108381369A CN 201810353542 A CN201810353542 A CN 201810353542A CN 108381369 A CN108381369 A CN 108381369A
- Authority
- CN
- China
- Prior art keywords
- sliding
- feeding
- self
- polishing machine
- electric pushrod
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B29/00—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
- B24B29/02—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents designed for particular workpieces
- B24B29/06—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents designed for particular workpieces for elongated workpieces having uniform cross-section in one main direction
- B24B29/08—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents designed for particular workpieces for elongated workpieces having uniform cross-section in one main direction the cross-section being circular, e.g. tubes, wires, needles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/005—Feeding or manipulating devices specially adapted to grinding machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
- B24B41/061—Work supports, e.g. adjustable steadies axially supporting turning workpieces, e.g. magnetically, pneumatically
- B24B41/062—Work supports, e.g. adjustable steadies axially supporting turning workpieces, e.g. magnetically, pneumatically between centres; Dogs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/20—Drives or gearings; Equipment therefor relating to feed movement
Abstract
The present invention relates to tubing polishing machine technical fields, especially a kind of tubing polishing machine with self-feeding and discharging, it is rotatably connected to threaded rod between the supporting rod, it is socketed with threaded block on the outside of the threaded rod, the lower end of the threaded block is connected with grinding device, the front end of the supporting table is connected with feeding device, the first electric pushrod is equipped on the left of the upper end of the sliding panel, second motor and the opposite side of fixed block are rotatably connected to oild chuck respectively, it is socketed with sliding sleeve on the outside of the lead screw, the outside of the sliding sleeve is connected by connecting rod with the right end of sliding panel, the one end of the workbench far from feeding device is connected with blanking device, the blanking device is identical as feeding device structure.Structure of the invention reasonable design, it is easy to operate, traditional manual mode of operation is changed by way of automatic charging and discharging, is greatly improved work efficiency, and the labor intensity of worker is reduced.
Description
Technical field
The present invention relates to tubing polishing machine technical field more particularly to a kind of tubing polishings with self-feeding and discharging
Machine.
Background technology
Polishing, is one kind of process for modifying surface, refers generally to by rough object（Sand paper containing higher hardness particle
Deng）To change by friction a kind of processing method of material surface physical property, main purpose is thick in order to obtain particular surface
Rugosity.
In the prior art, the usual the degree of automation of the grinding device of short tube is all relatively low, and the polishing to short tube is artificial mostly
What hand-held grinding device polished to part, worker is because the qualification of self-skill is different, after leading to grinding workpieces
Roughness also difference, the meeting that works long hours can bring worker larger labor intensity；Or first pass through artificial progress
Feeding, after being polished by machine, then by artificial mode blanking, this mode can cause the efficiency of polishing work to reduce, and work
The labor intensity of people is larger, it has not been convenient to use.Therefore, it is necessary to a kind of tubing polishing machines with self-feeding and discharging.
Invention content
The purpose of the present invention is to solve disadvantage existing in the prior art, and the one kind proposed have self-feeding and
The tubing polishing machine of discharging.
To achieve the goals above, present invention employs following technical solutions：
Design a kind of tubing polishing machine with self-feeding and discharging, including workbench, the upper end side pair of the workbench
Claim to be equipped with supporting rod, the upper end of the supporting rod is connected with top plate, is rotatably connected to threaded rod between two supporting rods, institute
It states and is socketed with threaded block on the outside of threaded rod, the lower end of the threaded block is connected with grinding device, the outside one of the supporting rod
Side is equipped with first motor, and the output shaft of the first motor is fixedly connected with threaded rod, and the upper end side of the workbench is set
There are supporting table, the upper end of the supporting table to be equipped with storage groove, the front end of the supporting table is connected with feeding device, the workbench
Upper center offer second sliding slot, the inner cavity of the second sliding slot slidably connects sliding panel, the upper end of the sliding panel
Left side is equipped with the first electric pushrod, and the upper end of first electric pushrod is connected with the second motor, and the upper end of the sliding panel is right
Slideslip is connected with the second electric pushrod, and the lower right side of second electric pushrod is connected with third electric pushrod, and described
The upper end of two electric pushrods is connected with fixed block, and second motor and the opposite side of fixed block are rotatably connected to hydraulic pressure respectively
Chuck, the second sliding slot inner cavity right side are equipped with third motor, and the inner wall both sides right part of the second sliding slot is rotatably connected to silk
Bar, and the lead screw is connected with the output shaft of third motor, and sliding sleeve, the outside of the sliding sleeve are socketed on the outside of the lead screw
It is connected with the right end of sliding panel by connecting rod, the one end of the workbench far from feeding device is connected with blanking device, described
Blanking device is identical as feeding device structure.
Preferably, the upper end of the threaded block is connected with sliding block by connecting rod, and the lower end of the top plate offers and slides
The first sliding groove that block matches.
Preferably, the left hand external of the grinding device is equipped with outer cover, and the outer cover is aluminium alloy cover body.
Preferably, the intracavity bottom of the second sliding slot is arranged with the first groove, and the groove is internally provided with ball,
And the lower end of the sliding panel is equipped with compatible second groove of ball.
Preferably, the upper end right side opening of the sliding panel is equipped with T-slot, and the lower end of second electric pushrod passes through one
Body formed link block is connected with the T-type sliding block to match with T-slot.
Preferably, the feeding device includes the storing stand being connected with workbench, and the both ends of the storing stand are equipped with
The internal slide of sliding rail, the sliding rail is connected with limiting plate.
A kind of tubing polishing machine with self-feeding and discharging proposed by the present invention, advantageous effect are：By will be short
Pipe is first stored in feeding device, and short tube can be snapped down in the storage groove of upper end of supporting table under the effect of gravity, so
It is cooperated afterwards by the second electric pushrod, third electric pushrod and oild chuck and picks up short tube, then moved by sliding panel
It drives short tube to be moved to below grinding device to polish, after the completion of polishing, releases clamping of the oild chuck to short tube, short tube
It can be rolled out from blanking device, so as to complete the self-feeding, discharging and polishing of short tube.Structure of the invention reasonable design, behaviour
Make simply, traditional manual mode of operation to be changed by way of automatic charging and discharging, is greatly improved work efficiency, drop
The low labor intensity of worker.
Description of the drawings
Fig. 1 is a kind of tubing polisher structure schematic diagram with self-feeding and discharging proposed by the present invention；
Fig. 2 is a kind of tubing polishing machine schematic top plan view with self-feeding and discharging proposed by the present invention；
Fig. 3 is feeding device structural schematic diagram in a kind of tubing polishing machine with self-feeding and discharging proposed by the present invention；
Fig. 4 is part-structure schematic diagram in a kind of tubing polishing machine with self-feeding and discharging proposed by the present invention.
In figure：Workbench 1, supporting rod 2, top plate 3, first motor 4, threaded rod 5, threaded block 6, grinding device 7, outer cover 8,
Sliding block 9, the first sliding groove 10, supporting table 11, second sliding slot 12, the first electric pushrod 13, sliding panel 14, T-slot 15, T-type sliding block
16, the second electric pushrod 17, third electric pushrod 18, lead screw 19, the second motor 20, fixed block 21, oild chuck 22, storage groove
23, feeding device 24, third motor 25, sliding sleeve 26, blanking device 27, storing stand 28, sliding rail 29, limiting plate 30, ball 31.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
Referring to Fig.1-4, a kind of tubing polishing machine with self-feeding and discharging, including workbench 1, workbench 1 it is upper
End side is arranged with supporting rod 2, and the upper end of supporting rod 2 is connected with top plate 3, screw thread is rotatably connected between two supporting rods 2
The outside of bar 5, threaded rod 5 is socketed with threaded block 6, and the upper end of threaded block 6 is connected with sliding block 9, and the lower end of top plate 3 by connecting rod
The first sliding groove 10 to match with sliding block 9 is offered, the gravity of a part of grinding device 7 can be undertaken, advantageously reduce screw thread
Abrasion between bar 5 and threaded block 6.
The lower end of threaded block 6 is connected with grinding device 7, and the left hand external of grinding device 7 is equipped with outer cover 8, and outer cover 8 closes for aluminium
Golden cover body can everywhere sputter to avoid the spark generated when polishing, improve safety.
The external side of supporting rod 2 is equipped with first motor 4, and the output shaft of first motor 4 is fixedly connected with threaded rod 5,
The upper end side of workbench 1 is equipped with supporting table 11, and the upper end of supporting table 11 is equipped with storage groove 23, and the front end of supporting table 11 is connected with
The upper center of feeding device 24, workbench 1 offers second sliding slot 12, and the inner cavity of second sliding slot 12 slidably connects sliding panel
14, the intracavity bottom of second sliding slot 12 is arranged with the first groove, and groove is internally provided with ball 31, and the lower end of sliding panel 14
Equipped with 31 compatible second groove of ball, the frictional force between 12 inner wall of sliding panel 14 and second sliding slot can be reduced, more
Be conducive to the sliding of sliding panel 14.
The first electric pushrod 13 is equipped on the left of the upper end of sliding panel 14, the upper end of the first electric pushrod 13 is connected with the second electricity
The upper end right side of machine 20, sliding panel 14 slidably connects the second electric pushrod 17, and the upper end right side opening of sliding panel 14 is equipped with T-slot
15, and the lower end of the second electric pushrod 17 is connected with the T-type sliding block to match with T-slot 15 by integrally formed link block
16, stability when the second electric pushrod 17 is moved forward and backward can be enhanced, the second electric pushrod 17 is avoided to slide.
The lower right side of second electric pushrod 17 is connected with third electric pushrod 18, the upper end connection of the second electric pushrod 17
There is a fixed block 21, the second motor 20 and the opposite side of fixed block 21 are rotatably connected to oild chuck 22, second sliding slot 12 respectively
It is equipped with third motor 25 on the right side of inner cavity, the inner wall both sides right part of second sliding slot 12 is rotatably connected to lead screw 19, and lead screw 19 and the
The output shaft of three motors 25 is connected, and the outside of lead screw 19 is socketed with sliding sleeve 26, and the outside of sliding sleeve 26 passes through connecting rod and sliding panel
14 right end is connected, and the one end of workbench 1 far from feeding device 24 is connected with blanking device 27, and blanking device 27 is filled with feeding
Set that 24 structures are identical, but the placed angle of blanking device 27 and feeding device 24 is on the contrary, feeding device 24 includes and workbench 1
The both ends of the storing stand 28 being connected, storing stand 28 are equipped with sliding rail 29, and the internal slide of sliding rail 29 is connected with limiting plate 30, limit
Plate 30 enables short tube to keep horizontal, is not in inclination, meanwhile, limiting plate 30 can be moved freely in sliding rail 29, to
It can adapt to the tubing of different length.
Operation principle：When work, by the way that short tube to be first stored in feeding device 24, short tube is under the effect of gravity
In the storage groove 23 for the upper end that supporting table 11 can be snapped down to along limiting plate 30, then second is driven by third electric pushrod 18
Electric pushrod 17 is moved to left close to supporting table 11, is picked up short tube by oild chuck 22, then drives silk by third motor 25
Bar 19 rotates so that sliding sleeve 26 is moved to the lower section of grinding device 7 with sliding panel 14, then drives screw thread by first motor 4
Bar 5 rotates so that and threaded block 6 drives the movement of grinding device 7 to polish short tube, meanwhile, the second motor 20 drives by hydraulic pressure
The short tube rotation that chuck 22 is clamped, it is ensured that the polishing effect of short tube after the completion of polishing, releases oild chuck 22 to short tube
Clamping, short tube can be rolled out from blanking device 27, and then third motor 25 inverts, and drive lead screw 19 to rotate backward so that sliding sleeve
26 reset with sliding panel 14, and then picking up an other short tube again by clamping oild chuck 22 polishes, so as to
To complete automatic charging and the discharging of short tube.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. a kind of tubing polishing machine with self-feeding and discharging, including workbench（1）, the workbench（1）Upper end one
Side is arranged with supporting rod（2）, the supporting rod（2）Upper end be connected with top plate（3）, which is characterized in that two supports
Bar（2）Between be rotatably connected to threaded rod（5）, the threaded rod（5）Outside be socketed with threaded block（6）, the threaded block（6）
Lower end be connected with grinding device（7）, the supporting rod（2）External side first motor is installed（4）, the first motor
（4）Output shaft and threaded rod（5）It is fixedly connected, the workbench（1）Upper end side be equipped with supporting table（11）, the support
Platform（11）Upper end be equipped with storage groove（23）, the supporting table（11）Front end be connected with feeding device（24）, the workbench
（1）Upper center offer second sliding slot（12）, the second sliding slot（12）Inner cavity slidably connect sliding panel（14）, institute
State sliding panel（14）Upper end on the left of be equipped with the first electric pushrod（13）, first electric pushrod（13）Upper end be connected with
Two motors（20）, the sliding panel（14）Upper end on the right side of slidably connect the second electric pushrod（17）, described second electronic pushes away
Bar（17）Lower right side be connected with third electric pushrod（18）, second electric pushrod（17）Upper end be connected with fixed block
（21）, second motor（20）And fixed block（21）Opposite side is rotatably connected to oild chuck respectively（22）, described
Two sliding slots（12）Third motor is equipped on the right side of inner cavity（25）, the second sliding slot（12）Inner wall both sides right part be rotatably connected to silk
Bar（19）, and the lead screw（19）With third motor（25）Output shaft be connected, the lead screw（19）Outside be socketed with cunning
Set（26）, the sliding sleeve（26）Outside pass through connecting rod and sliding panel（14）Right end be connected, the workbench（1）Far from upper
Expect device（24）One end be connected with blanking device（27）, the blanking device（27）With feeding device（24）Structure is identical.
2. a kind of tubing polishing machine with self-feeding and discharging according to claim 1, which is characterized in that the spiral shell
Line block（6）Upper end sliding block is connected with by connecting rod（9）, and the top plate（3）Lower end offer and sliding block（9）Match
The first sliding groove（10）.
3. a kind of tubing polishing machine with self-feeding and discharging according to claim 1, which is characterized in that described to beat
Mill apparatus（7）Left hand external be equipped with outer cover（8）, the outer cover（8）For aluminium alloy cover body.
4. a kind of tubing polishing machine with self-feeding and discharging according to claim 1, which is characterized in that described
Two sliding slots（12）Intracavity bottom be arranged with the first groove, the groove is internally provided with ball（31）, and the sliding panel
（14）Lower end be equipped with ball（31）Compatible second groove.
5. a kind of tubing polishing machine with self-feeding and discharging according to claim 1, which is characterized in that the cunning
Movable plate（14）Upper end right side opening be equipped with T-slot（15）, and second electric pushrod（17）Lower end pass through it is integrally formed
Link block is connected with and T-slot（15）The T-type sliding block to match（16）.
6. a kind of tubing polishing machine with self-feeding and discharging according to claim 1, which is characterized in that on described
Expect device（24）Include and workbench（1）The storing stand being connected（28）, the storing stand（28）Both ends be equipped with sliding rail
（29）, the sliding rail（29）Internal slide be connected with limiting plate（30）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810353542.5A CN108381369A (en) | 2018-04-19 | 2018-04-19 | A kind of tubing polishing machine with self-feeding and discharging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810353542.5A CN108381369A (en) | 2018-04-19 | 2018-04-19 | A kind of tubing polishing machine with self-feeding and discharging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108381369A true CN108381369A (en) | 2018-08-10 |
Family
ID=63065562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810353542.5A Withdrawn CN108381369A (en) | 2018-04-19 | 2018-04-19 | A kind of tubing polishing machine with self-feeding and discharging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108381369A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110977586A (en) * | 2019-12-18 | 2020-04-10 | 驰逸自动化科技(苏州)有限公司 | Alloy precision machining equipment for actively verifying product and working method thereof |
| CN111015483A (en) * | 2019-12-25 | 2020-04-17 | 浙江水利水电学院 | Device for inducing wheel surface finishing and finishing processing method |
| CN111015453A (en) * | 2019-12-05 | 2020-04-17 | 大同新成新材料股份有限公司 | Machining clamping tool for intelligent carbon sliding plate and clamping method thereof |
| CN111077274A (en) * | 2020-01-19 | 2020-04-28 | 广州市仙现机械设备有限公司 | Instrument for detecting and processing welding quality of large-diameter pipeline |
| CN111761500A (en) * | 2020-05-30 | 2020-10-13 | 董良印 | Polishing machine for surface of steel pipe and using method of polishing machine |
| CN111872832A (en) * | 2020-08-03 | 2020-11-03 | 新昌县世立机械设备厂 | Burnishing device is used in machine part processing |
| CN112123188A (en) * | 2020-09-25 | 2020-12-25 | 湖州奇奇机电科技有限公司 | Automatic feeding clamping mechanism for polishing outer wall surface of metal sleeve |
| CN113370031A (en) * | 2021-06-25 | 2021-09-10 | 王雪珍 | Spiral machining equipment capable of carrying out online detection for intelligent manufacturing |
-
2018
- 2018-04-19 CN CN201810353542.5A patent/CN108381369A/en not_active Withdrawn
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111015453A (en) * | 2019-12-05 | 2020-04-17 | 大同新成新材料股份有限公司 | Machining clamping tool for intelligent carbon sliding plate and clamping method thereof |
| CN110977586A (en) * | 2019-12-18 | 2020-04-10 | 驰逸自动化科技(苏州)有限公司 | Alloy precision machining equipment for actively verifying product and working method thereof |
| CN110977586B (en) * | 2019-12-18 | 2021-02-19 | 驰逸自动化科技(苏州)有限公司 | Alloy precision machining equipment for actively verifying product and working method thereof |
| CN111015483A (en) * | 2019-12-25 | 2020-04-17 | 浙江水利水电学院 | Device for inducing wheel surface finishing and finishing processing method |
| CN111077274A (en) * | 2020-01-19 | 2020-04-28 | 广州市仙现机械设备有限公司 | Instrument for detecting and processing welding quality of large-diameter pipeline |
| CN111761500A (en) * | 2020-05-30 | 2020-10-13 | 董良印 | Polishing machine for surface of steel pipe and using method of polishing machine |
| CN111872832A (en) * | 2020-08-03 | 2020-11-03 | 新昌县世立机械设备厂 | Burnishing device is used in machine part processing |
| CN111872832B (en) * | 2020-08-03 | 2021-04-30 | 陕西瑞恩机械设备制造有限公司 | Burnishing device is used in machine part processing |
| CN112123188A (en) * | 2020-09-25 | 2020-12-25 | 湖州奇奇机电科技有限公司 | Automatic feeding clamping mechanism for polishing outer wall surface of metal sleeve |
| CN113370031A (en) * | 2021-06-25 | 2021-09-10 | 王雪珍 | Spiral machining equipment capable of carrying out online detection for intelligent manufacturing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108381369A (en) | A kind of tubing polishing machine with self-feeding and discharging | |
| CN111958469A (en) | Clamping type polishing equipment for synchronously polishing inner wall and outer wall of stainless steel pipe | |
| CN109420943A (en) | A kind of surface grinding machine machine table | |
| CN209520705U (en) | A kind of industrial robot grinding device | |
| CN208841119U (en) | Grinding attachment is used in a kind of production of mechanical workpieces | |
| CN208034336U (en) | A kind of grinding device for bearing block | |
| CN213469843U (en) | Flexible processing device for chamfering orifice of connecting rod | |
| CN207223635U (en) | A kind of movable sander for polishing spindle axis | |
| CN211867459U (en) | Semi-automatic multi-station machine part grinding and polishing device | |
| CN105196141B (en) | A kind of end face Superfinishing machine | |
| CN212886811U (en) | Grinding device for machining and polishing suit door | |
| CN211072881U (en) | Special milling cutter grinding device | |
| CN209648328U (en) | A kind of stainless steel materials grinding apparatus that heat resistance is good | |
| CN210499413U (en) | Workpiece transfer device for part machining | |
| CN107962469A (en) | A kind of screw burnishing device | |
| CN210557898U (en) | Automatic feeding device for cleaning automobile brake disc | |
| CN210160959U (en) | Steel casting fixing and clamping device | |
| CN210550334U (en) | Wire rod surface polishing device | |
| CN113857983A (en) | Metal machinery guide pulley processing surface treatment device | |
| CN209007301U (en) | A kind of useless rust removing device for steel tube | |
| CN207788651U (en) | A kind of parts frock clamp surface polishing device | |
| CN207953508U (en) | A kind of burnishing device for core filled composite material plate | |
| CN215357598U (en) | Polishing device for hydraulic jack processing | |
| CN216830259U (en) | Bearing inner race grinding device | |
| CN204171263U (en) | Wire pulling machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180810 |