CN107855941A - Plate surface processing equipment and processing method - Google Patents
Plate surface processing equipment and processing method Download PDFInfo
- Publication number
- CN107855941A CN107855941A CN201711305423.4A CN201711305423A CN107855941A CN 107855941 A CN107855941 A CN 107855941A CN 201711305423 A CN201711305423 A CN 201711305423A CN 107855941 A CN107855941 A CN 107855941A
- Authority
- CN
- China
- Prior art keywords
- equipment
- plate surface
- surface processing
- sprinkler
- workbench
- 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
- 238000003672 processing method Methods 0.000 title description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 239000003082 abrasive agent Substances 0.000 claims description 22
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 19
- 239000004576 sand Substances 0.000 claims description 16
- 230000007547 defect Effects 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 4
- 239000006004 Quartz sand Substances 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 206010016256 fatigue Diseases 0.000 claims description 2
- 239000002223 garnet Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 abstract description 12
- 239000010936 titanium Substances 0.000 abstract description 12
- 229910052719 titanium Inorganic materials 0.000 abstract description 12
- 229910052751 metal Inorganic materials 0.000 abstract description 9
- 239000002184 metal Substances 0.000 abstract description 9
- 238000004381 surface treatment Methods 0.000 abstract description 9
- 238000005498 polishing Methods 0.000 abstract description 7
- 239000000428 dust Substances 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- 238000011109 contamination Methods 0.000 abstract description 3
- 230000006378 damage Effects 0.000 abstract description 3
- 239000000758 substrate Substances 0.000 abstract description 3
- 208000027418 Wounds and injury Diseases 0.000 abstract description 2
- 208000014674 injury Diseases 0.000 abstract description 2
- 238000005554 pickling Methods 0.000 abstract description 2
- 238000005480 shot peening Methods 0.000 abstract description 2
- 238000005422 blasting Methods 0.000 abstract 1
- 238000005488 sandblasting Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000002893 slag Substances 0.000 description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910001651 emery Inorganic materials 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
- B24C1/086—Descaling; Removing coating films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
- B24C9/003—Removing abrasive powder out of the blasting machine
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
- B24C9/006—Treatment of used abrasive material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The present invention relates to field of metal surface treatment, and in particular to a kind of plate surface processing equipment, further to the method being surface-treated using the equipment to sheet material.The plate surface processing equipment has workbench and removable gantry mechanical arm across workbench, further comprise two groups of power sprinkler equipments, the equipment dynamic sprinkler equipment is flexibly connected with the crossbeam of gantry mechanical arm and can moved along crossbeam direction, and two groups of equipment dynamic sprinkler equipments can individually or simultaneously work.The automation degree of equipment is high, and processing time can be greatly shortened, and improves the efficiency of plate surface processing.The present invention is with high pressure gas water under high pressure mixing blasting treatment sheet material, particularly titanium plate surface scale, substitute existing sandblasting shot-peening/polishing, pickling mode, reduce the injury for metal substrate, and can further avoid chemical contamination, reduce dust pollution, it is a kind of surface treatment method of green high-efficient.
Description
Technical field
The present invention relates to field of metal surface treatment, and in particular to a kind of plate surface processing equipment, further to making
The method being surface-treated with the equipment to sheet material.
Background technology
Plate surface processing be in sheet fabrication manufacturing process must be through process.Sheet material, particularly all kinds of sheet metals,
All kinds of surface defects often be present in manufacturing process, it is necessary to eliminate these defects, following process manufacture can be carried out.
Traditional plate surface is handled, especially for the processing of metal sheet surface oxide layer, uses shot-peening and pickling more
Technique, or the method that the polishing of artificial and semi-mechanization is carried out (containing polishing wheel, abrasive band, angle grinding etc.) using emery wheel.It is above-mentioned
Process is not only time-consuming during removing oxide layer is removed, and metal sheet surface polishing scratch is deep, causes waste of material；
In addition, chemical contamination, dust pollution etc. caused by the above method, not only have a strong impact on environment, also to the health of operator
Damage.As country increases increasingly for the dynamics of environmental protection and labour protection, standby spy is for chemical hazard and dust danger
Evil operation carries out the strike of more great dynamicses, and existing plate surface processing method can not meet need of social production.
The content of the invention
To solve problems of the prior art, the present invention proposes plate surface processing equipment and processing method.
On the one hand, there is provided plate surface processing equipment, the equipment can shorten processing time, reduce for sheet material matrix
The injury of substrate, and can further avoid chemical contamination, reduce dust pollution.
Specifically, the plate surface processing equipment has workbench and removable gantry machinery across workbench
Arm, it is characterised in that also lived including two groups of power sprinkler equipments, the equipment dynamic sprinkler equipment and the crossbeam of gantry mechanical arm
Dynamic to connect and be moved along crossbeam direction, two groups of equipment dynamic sprinkler equipments can individually or simultaneously work.
Further, the equipment dynamic sprinkler equipment includes base, guide rail and shower nozzle, the base and gantry mechanical arm
Crossbeam be flexibly connected, the guide rail is arranged at base and is flexibly connected perpendicular to table plane, the shower nozzle with guide rail
And it can be moved up and down along guide rail.
Further, the equipment dynamic sprinkler equipment also includes steam collecting hood, and the steam collecting hood is connected to institute
State base and shower nozzle described in portion envelops.Steam collecting hood, which can reduce, is sprayed onto splashing for the current to be rebounded after sheet material table and abrasive material
Penetrate, resource can be collected, and can improves construction operation environment.
Further, the workbench has lattice-shaped working face, is set gradually below the lattice-shaped working face
Filter plant and collecting box.By filter plant, such as screen pack etc., the abrasive material that shower nozzle sprays and entrainment grinding can be obtained
Oxidation titanium slag water separation, abrasive material reclaimed, and water is flowed into collecting box, through precipitation, filters again, titanium oxide is separately recovered
Slag and water.
Further, the plate surface processing equipment also includes water pressurized equipment, gas pressurized equipment, sand feeding equipment and mill
Expect even mixing device, the even mixing device of abrasive material mixes the pressure (hydraulic) water that water pressurized equipment is sent out with the abrasive material that sand feeding equipment is sent out
It is even after be sent into sand water loop, and with gas pressurized equipment send out forced air converge after be sent into connected with power sprinkler equipment add
Press jet hose.
The plate surface processing equipment of the present invention, can by setting removable straddle truck mechanical arm and power sprinkler equipment
Shower nozzle movement locus is controlled on three directions of x, y, z, realizes accurate and efficient polishing.Two sets of power sprinkler equipments are prepared,
The power sprinkler equipment quantity of work can according to circumstances be selected, it is possible to increase grinding efficiency, steam collecting hood also can effectively drop
Dirt, it is easy to resource reclaim.The processing unit of the present invention also has the collecting box with installation filter plant, can not only recycle-water
And abrasive material, additionally it is possible to which the titanium oxide skin that recovery polishing is dropped, resource recycling, which reaches, does big degree.
Plate surface processing equipment provided by the present invention is applied to the surface treatment of all kinds of sheet materials, including metal, inorganic
Nonmetallic and organic board, especially suitable for the processing for sheet metal surface defect, it is further adapted to oxide layer
Titanium plate surface treatment, such as the removal of oxide layer and surface polishing etc..
Another aspect of the present invention is directed to use with the surface that aforementioned device carries out sheet material, the particularly titanium plate with oxide layer
The method of processing, methods described have higher automaticity, can reduce manual labor amount, improve sheet material treatment effeciency and matter
Amount.
The plate surface processing method comprises the following steps：
S01, stock：To water, air pressurized, prepare abrasive material；
S02, pending sheet material is positioned over workbench；
S03, by the position coordinates of pending sheet material, need the defects of processing region type and its position, size, and spray
Head translational speed and spray angle, input control apparatus；
S04, the parameter according to step S03, whether two groups of power sprinkler equipments of control work, its movement locus, Yi Jishui
Atmospheric pressure, starting device carry out plate surface processing.
Further, in step S01, the pressure of pressure (hydraulic) water in 2~30MPa, the pressure of forced air 0.6~
1.5MPa。
Further, in step S01, one kind in garnet, white fused alumina, quartz sand, washed-out sand of the abrasive material or
Two or more combinations., the particle diameter of the abrasive material is 80~180 mesh.
Further, in step S03, a kind of mode in online programming or off-line programing or two kinds of modes combined are passed through
Parameter is inputted into the control device.
The beneficial effect of said one or multiple technical schemes is：
1st, plate surface treatment effeciency is high.Plate surface processing equipment is carried out by numerical control device to three axle gantry mechanical arms
It is precisely controlled, realizes the automation of plate surface processing, particularly had the advantage that in terms of scale removal, double workhead
Use, save it is artificial, far above the efficiency of currently available technology equipment.It is whole that the equipment of the present invention can handle one in 2 hours
Open titanium plate.
2nd, good environmental protection.Using double high-pressure sand blast descale equipment, compared to grinder buffing, it can reduce by more than 95% powder
Pollution of the dirt to environment, waste water and dregs after filtering precipitates, after abrasive material and metal (oxide) slag of solid-state can reclaim
Recycle.
3rd, save material and reduce waste.Compared with grinder buffing, the equipment by control device adjust automatically various parameters,
Movement locus and aqueous vapor sand ratio are precisely controlled, base material is not injured while surface defect is removed and (removes base material thickness control
In 10um), reduce substrate material and waste more than 70%, greatly reduce the removal amount to sheet material, material has been saved from source
Material, reduces cost, improves economic benefit.
4th, automaticity is high.Using three-dimension numerical controlled equipment, on-line/off-line programming, line program control is entered to gantry mechanical arm
System, realize the automation of plate surface processing operation overall process.
5th, surface quality is good.Using double high-pressure sand blast descale equipment, compared with grinder buffing technique, plate surface matter
Amount greatly improves, and ensures that the quality of sheet material subsequent handling.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below to embodiment or existing
The required accompanying drawing used is briefly described in technology.It should be evident that drawings in the following description are only the present invention's
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other accompanying drawings.
Fig. 1 is the schematic diagram of one embodiment of plate surface processing equipment.
Fig. 2 is the schematic diagram of power sprinkler equipment in one embodiment that plate surface is handled.
Fig. 3 is the schematic diagram that steam sandpipe road connects in one embodiment that plate surface is handled.
Embodiment
Below in conjunction with the drawings and examples of the present invention, technical scheme is clearly and completely described.
Based on the embodiment in the present invention, those of ordinary skill in the art are obtained all under the premise of creative work is not made
Other embodiment, belong to the scope of protection of the invention.
Embodiment 1
Referring to Fig. 1.Plate surface processing equipment has workbench 1 and crosses over workbench and moveable gantry mechanical arm 2,
Two groups of equipment dynamic sprinkler equipments 3 are movably connected on the crossbeam of gantry mechanical arm, and can be moved along crossbeam direction.Workbench 1 has
There is lattice-shaped working face, screen pack 4 and collecting box 5 successively are set below lattice-shaped working face.
With further reference to Fig. 2, equipment dynamic sprinkler equipment includes base 301, guide rail 302 and shower nozzle 303, base 301 with
The crossbeam 201 of gantry mechanical arm is flexibly connected, and guide rail 302 is arranged at base 301 and perpendicular to the plane of workbench 1, shower nozzle 3
Moved with guide rail work 302 and connect and can be moved up and down along guide rail 302.Equipment dynamic sprinkler equipment also includes steam collecting hood 304, water
Vapour collecting hood 304 is fixedly connected on the lower end of base 301 into semi-circular cylindrical, its top, and semicircular cylinder wraps showerhead subpackage, with
Obstruct water sand splashed etc..Steam collecting hood 304 can also be that the round table-like, arc surfaced of tabular, part hollow etc. is any
Form, as long as it can realize the effect that foregoing barrier water sand is splashed.
Embodiment 2
It is to provide abrasive material to power sprinkler equipment 3, plate surface processing equipment of the invention also adds including water referring to Fig. 3
Pressure equipment 6, gas pressurized equipment 7, sand feeding equipment 8 and the even mixing device 9 of abrasive material, the even mixing device 9 of abrasive material send water pressurized equipment 6
The pressure (hydraulic) water gone out is sent into sand water loop 10 after being well mixed with the abrasive material that sand feeding equipment 8 is sent out, and sent out with gas pressurized equipment 7
Forced air is sent into the pressurized jet flexible pipe 11 connected with power sprinkler equipment after converging.
Embodiment 3
The technological process that the surface treatment of titanium plate is carried out using the equipment shown in embodiment 1 is as follows.
2 × 8m whole head is pricked into titanium plate to lie against between two parties on the raster plane of workbench 1, by titanium plate corner location coordinate
Control device is input to offline, cleaning area is selected and is width 20mm titanium oxide skin, and further set cleaning speed
0.13m/s, incidence angle are 65 °；Control device generates the movement locus of shower nozzle according to input parameter, provides estimated one side cleaning
Time is 65min.
120 mesh quartz sands are chosen as abrasive material；It is gentle to water to be forced into 1.0MPa and 25MPa respectively.Start surface treatment
Equipment, single shower nozzle work 5s is controlled first, and parameter is finely adjusted when necessary according to surface treatment effect；Then, open
Dynamic double shower nozzles work until titanium plate one side is disposed simultaneously.The titanium plate back side is handled in the same fashion after turn-over.Processing procedure
Time-consuming about 2h.
After being disposed, the abrasive material of filter screen 4 is collected, by collecting box 5.Stand, after titanium slag precipitation to be oxidized, carry out solid-liquid point
From, will oxidation titanium slag dry after recycle.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. plate surface processing equipment, there is workbench and removable gantry mechanical arm across workbench, it is characterised in that：Also
Including two groups of power sprinkler equipments, the equipment dynamic sprinkler equipment is flexibly connected with the crossbeam of gantry mechanical arm and can be along crossbeam
Direction is moved, and two groups of equipment dynamic sprinkler equipments can individually or simultaneously work.
2. plate surface processing equipment according to claim 1, it is characterised in that the equipment dynamic sprinkler equipment includes
Base, guide rail and shower nozzle, the base are flexibly connected with the crossbeam of gantry mechanical arm, and the guide rail is arranged at base and vertical
In table plane, the shower nozzle is flexibly connected with guide rail and can moved up and down along guide rail.
3. plate surface processing equipment according to claim 1, it is characterised in that the equipment dynamic sprinkler equipment is also wrapped
Steam collecting hood is included, the steam collecting hood is connected to the base and shower nozzle described in portion envelops.
4. plate surface processing equipment according to claim 1, it is characterised in that the workbench has lattice-shaped work
Plane, the lattice-shaped working face lower section set gradually filter plant and collecting box.
5. plate surface processing equipment according to claim 1, it is characterised in that the plate surface processing equipment is also wrapped
Water pressurized equipment, gas pressurized equipment, sand feeding equipment and the even mixing device of abrasive material are included, the even mixing device of abrasive material send water pressurized equipment
The pressure (hydraulic) water gone out is sent into sand water loop, and the pressurization sent out with gas pressurized equipment after being well mixed with the abrasive material that sand feeding equipment is sent out
Air is sent into the pressurized jet flexible pipe connected with power sprinkler equipment after converging.
6. usage right requires the method that the plate surface processing equipment described in 1~5 any one carries out plate surface processing, it is special
Sign is, comprises the following steps：
S01, stock：To water, air pressurized, prepare abrasive material；
S02, pending sheet material is positioned over workbench；
S03, by the position coordinates of pending sheet material, need the defects of processing region type and its position, size, and shower nozzle moves
Dynamic speed and spray angle, input control apparatus；
S04, the parameter according to step S03, whether two groups of power sprinkler equipments of control work, its movement locus, and vapour pressure
Power, starting device carry out plate surface processing.
7. according to the method for claim 6, it is characterised in that in step S01, the pressure of pressure (hydraulic) water adds in 2~30MPa
The pressure of air is pressed in 0.6~1.5MPa.
8. according to the method for claim 6, it is characterised in that in step S01, the abrasive material be selected from garnet, white fused alumina,
Combination more than one or both of quartz sand, washed-out sand.
9. according to the method for claim 8, it is characterised in that the particle diameter of the abrasive material is 80~180 mesh.
10. according to the method for claim 6, it is characterised in that in step S03, by online programming or off-line programing
A kind of mode or two kinds combination modes parameter is inputted into the control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711305423.4A CN107855941A (en) | 2017-12-11 | 2017-12-11 | Plate surface processing equipment and processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711305423.4A CN107855941A (en) | 2017-12-11 | 2017-12-11 | Plate surface processing equipment and processing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107855941A true CN107855941A (en) | 2018-03-30 |
Family
ID=61705414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711305423.4A Pending CN107855941A (en) | 2017-12-11 | 2017-12-11 | Plate surface processing equipment and processing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107855941A (en) |
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|---|---|---|---|---|
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| TW201016390A (en) * | 2008-08-07 | 2010-05-01 | Fuji Mfg Co Ltd | Blasting method and apparatus having abrasive recovery system, processing method of thin-film solar cell panel, and thin-film solar cell panel processed by the method |
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| CN207710572U (en) * | 2017-12-11 | 2018-08-10 | 西安蓝想新材料科技有限公司 | Plate surface processing equipment |
-
2017
- 2017-12-11 CN CN201711305423.4A patent/CN107855941A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006088807A2 (en) * | 2005-02-14 | 2006-08-24 | Nucor Corporation | Blast head for loosening or removing scale on a metal surface |
| TW201016390A (en) * | 2008-08-07 | 2010-05-01 | Fuji Mfg Co Ltd | Blasting method and apparatus having abrasive recovery system, processing method of thin-film solar cell panel, and thin-film solar cell panel processed by the method |
| CN101774157A (en) * | 2010-01-19 | 2010-07-14 | 湖南有色重型机器有限责任公司 | Method and equipment for removing scale on metal wires or metal bars by grinding material water jet |
| CN102267101A (en) * | 2010-06-04 | 2011-12-07 | 新东工业株式会社 | Apparatus for treating a plate-like member and method of treating the same |
| CN103170918A (en) * | 2013-04-10 | 2013-06-26 | 长沙矿冶研究院有限责任公司 | High-pressure water jet sand-blast cleaning production line for inner surface of tubing |
| CN105196184A (en) * | 2015-08-21 | 2015-12-30 | 安徽理工大学 | High-pressure water jet cutting device and control method |
| CN106002641A (en) * | 2016-06-13 | 2016-10-12 | 无锡强工机械工业有限公司 | Water saving type oil and rust removal device |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180330 |