CN107716647A - Heavy caliber intelligence bending machine - Google Patents
Heavy caliber intelligence bending machine Download PDFInfo
- Publication number
- CN107716647A CN107716647A CN201710999016.1A CN201710999016A CN107716647A CN 107716647 A CN107716647 A CN 107716647A CN 201710999016 A CN201710999016 A CN 201710999016A CN 107716647 A CN107716647 A CN 107716647A
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- CN
- China
- Prior art keywords
- cylinder
- bending machine
- oil
- reversal valve
- clamping platform
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
- B21D7/024—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment by a swinging forming member
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/12—Bending rods, profiles, or tubes with programme control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/16—Auxiliary equipment, e.g. for heating or cooling of bends
- B21D7/162—Heating equipment
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention provides a kind of heavy caliber intelligence bending machine, including propelling cylinder, rushing board mechanism, clamping platform and rocker arm body.The propelling cylinder is arranged on cylinder bracket, propelling cylinder front end flange disk is connected with the rushing board mechanism, the rushing board mechanism includes base and material folding oil cylinder, the base is slidably mounted on guide rail, it can be driven along guide rail by propelling cylinder and moved along a straight line, the clamping platform is located in front of rushing board mechanism, being symmetrically arranged in clamping platform has waist wheel carrier, the relative inner of left side waist wheel carrier and right side waist wheel carrier is respectively arranged with two clamping waist wheels, preceding support roller and rear support roller are respectively arranged with the rear and front end of the waist wheel carrier, in the exit of the clamping platform, medium-frequency heating coil is set, the rocker arm body includes rocker arm base, rocking arm, rocker shaft bed and chuck.Bending machine of the present invention can effectively be molded bore 1422mm bend pipe, and properties of product meet the super large displacement pipeline requirements of low temp area.
Description
Technical field
The present invention relates to a kind of pipe fitting process equipment, is specially that one kind is used for bigbore intelligent bending machine.
Background technology
The development trend of China's natural gas engineering in pipeline is further increase throughput rate and reducingd the construction costs as far as possible.
The oil gas supply agreement signed with China and country of Central Asia and Russia is, it is necessary to which it is 45,000,000,000~60,000,000,000 m3/a's to build throughput rate
Natural gas line.2nd generation (X70 and X80) natural gas pipeline projects technology can not meet the needs of super large throughput rate, need to develop
(the 3rd generation) pipeline engineering technology of new generation (grade of steel X90/X100,1219~1422mm of caliber, pressure are not less than 12MPa).Bend pipe
It is the important component of transportation pipeline, because stress condition is complicated during military service, particularly Sino-Russian eastern line very cold, its
Quality condition will directly affect the safe operation of pipeline, therefore the Production and quality control attention of bend pipe.At present, it is domestic big
The high-grade heating bend manufacturing process of throughput rate is still immature, performance can not still meet requirement, it is necessary to further improve its resultant force
Performance is learned, to ensure the safety and reliability of engineering.
In the transfering natural gas from the west to the east project in China, main line pipeline uses 1200mm large diameter pipeline.But oil gas is defeated at present
The bend pipes of the high-grade oil gas pipelines of more than 1200mm sent is domestic still untapped at present, relies primarily on import, and in
The bend pipe for the bore 1422mm that Russia's east line natural gas transportation uses still belongs to blank.For a long time, by environmental condition, raw material and add
The puzzlement of work technique, cryogenically virtually increase difficulty of construction always using electricity or steam tracing insulation with oil-gas transportation bend pipe
And operating cost, and increase a large amount of maintenance tasks.
In current steel bend pipe production, typically there are two kinds of medium-frequency pipe bender and cold bending machine.Medium-frequency pipe bender and cold
Bending machine respectively has advantage and disadvantage, and medium-frequency pipe bender is primarily adapted for use in large aperture, the stewing system of big wall thickness bend pipe, and cold bending machine is mainly applicable
In the stewing system of minor diameter, small wall thickness steel tube.Therefore, it is necessary to be carried out on the basis of existing medium-frequency pipe bender for 1422mm bores
New research and development, make its function relatively reliable, properties of product meet that severe cold low temp area requires.
The content of the invention
For in the prior art the defects of, the present invention provides a kind of heavy caliber intelligence bending machine, meets 1422mm heavy calibers
Bend pipe processing request.
Heavy caliber intelligence bending machine of the present invention, including propelling cylinder, rushing board mechanism, clamping platform and rocker arm body.
The propelling cylinder is arranged on cylinder bracket, and propelling cylinder front end flange disk is connected with the rushing board mechanism, the ledal-pushing machine
Structure includes base and material folding oil cylinder, lower mold is set on the base, material folding oil cylinder is located at directly over lower mold, under material folding oil cylinder
End sets upper mold, and the upper and lower mold pressing clamps body, and the base is slidably mounted on guide rail, and it can be by
Propelling cylinder drives and moved along a straight line along guide rail, and the clamping platform is located in front of rushing board mechanism, and being symmetrically arranged in clamping platform has
The relative inner of waist wheel carrier, left side waist wheel carrier and right side waist wheel carrier is respectively arranged with two clamping waist wheels, and the two waists wheel carrier can
It is driven through front and rear two groups of clamping waist wheels by clamping cylinder respectively to clamp body both lateral sides, two before and after the waist wheel carrier
Preceding support roller and rear support roller are respectively arranged with end, medium-frequency heating coil, the rocking arm machine are set in the exit of the clamping platform
Structure includes rocker arm base, rocking arm, rocker shaft bed and chuck, and the rocker arm base is secured transverse to clamping platform outlet side, described
Rocking arm is rotatably arranged on rocker shaft bed, and the rocker shaft bed is moveably mounted on rocker arm base, in rocker arm base one
Side sets radius to adjust motor, and the radius adjusts motor and drives rocker shaft bed to be moved along rocker arm base by screw rod transmission axle, and
Rocker shaft bed is locked on rocker arm base by bolt, chuck locking cylinder is set on the chuck, locked by the chuck
Oil cylinder drives the mold clamping body on chuck.
Further, predeformation heating coil is provided with the clamping platform inlet side, and after predeformation heating coil
Side sets upper and lower pressure roller, and the upper pressure roller is arranged on upper pressing roller holder, and pressing roller holder can be upper and lower by down pressing oil cylinder driving on this
It is mobile.
Further, in addition to hydraulic control system, the hydraulic control system includes fuel tank and is connected with fuel tank
First oil pump, the second oil pump and the 3rd oil pump, first oil pump out of the mouth are described through the first reversal valve and propelling cylinder UNICOM
Second oil pump out of the mouth and the first overflow valve UNICOM, the first overflow valve outlet through the second reversal valve and propelling cylinder UNICOM,
The oil-out of 3rd oil pump changes with the 3rd reversal valve, the 4th reversal valve, the 5th reversal valve, the 6th reversal valve, the 7th respectively
Connected to the oil inlet of valve, actuator port and the clamping cylinder UNICOM of the 3rd reversal valve, the 4th reversal valve
Actuator port and radius adjustment motor UNICOM, actuator port and the chuck locking cylinder of the 5th reversal valve join
It is logical, actuator port and the material folding oil cylinder UNICOM of the 6th reversal valve, the actuator port of the 7th reversal valve with it is described
Down pressing oil cylinder UNICOM.
Further, the 3rd oil pump out of the mouth is also associated with the second overflow valve, and first oil pump out of the mouth also connects
It is connected to the 3rd overflow valve.
Further, the front top of the clamping platform is provided with portal frame, mounting seat is provided with the middle part of the portal frame,
The mounting seat can be moved up and down relatively by the left and right adjustment motor being arranged on portal frame and upper and lower adjustment motor realization,
The medium-frequency heating coil is arranged on below the mounting seat, the medium-frequency heating coil is located at the exit of the clamping platform.
Further, the infrared laser temperature measuring equipment towards body is provided with the portal frame.
Further, in addition to spray cooling device.
Further, cover plate is set on the clamping platform, intermediate frequency capacitor box and oil pressure cable and cable are installed on cover plate.
Further, the infrared laser temperature measuring equipment is 2 points of inner arc and outer arc to the temperature measuring point of body.
By the improvement in above-mentioned bending machine structure, and the optimization design for hydraulic control system, me disclosure satisfy that
The conveying Natural Gas Projects requirement that the state such as state and country of Central Asia and Russia reaches, using hot-bending bends technology, plastic is curved
Pipe caliber is lifted to 1422mm by existing 1219mm, meets the needs of super large throughput rate, all technical of bend pipe product reaches
Regulation requires.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art
The required accompanying drawing used is briefly described in embodiment or description of the prior art.In all of the figs, similar element
Or part is typically identified by similar reference.In accompanying drawing, each element or part might not be drawn according to the ratio of reality.
Fig. 1 is the structural representation of this bending machine；
Fig. 2 is the structural representation of the chuck；
The hydraulic schematic diagram of hydraulic control system described in Fig. 3；
Fig. 4 is electrical control system structure figure；
Fig. 5 is electric-control system logical relation schematic diagram；
Fig. 6 is system hardware structural relation diagram.
Embodiment
The embodiment of technical solution of the present invention is described in detail below in conjunction with accompanying drawing.Following examples are only used for
Clearly illustrate technical scheme, therefore be only used as example, and the protection model of the present invention can not be limited with this
Enclose.
Heavy caliber intelligence bending machine of the present invention as shown in Figure 1 and Figure 2, including propelling cylinder 1, rushing board mechanism, folder
Tight platform and rocker arm body and hydraulic control system and electric control system.
The propelling cylinder is arranged on cylinder bracket 2, and propelling cylinder front end flange disk is connected with the rushing board mechanism.Institute
Stating rushing board mechanism includes base 3 and material folding oil cylinder 4, and lower mold is set on the base, and material folding oil cylinder is located at directly over lower mold,
Material folding oil cylinder lower end sets upper mold.The upper and lower mold pressing clamps body 5, and propelling cylinder 1 promotes the rushing board mechanism
Moved along a straight line along guide rail, so as to which body raw material be pushed ahead.
The clamping platform 6 is located in front of rushing board mechanism, and being symmetrically arranged in clamping platform has waist wheel carrier 7, left side waist wheel carrier
Two clamping waist wheels are respectively arranged with the relative inner of right side waist wheel carrier, the two waists wheel carrier can be driven by clamping cylinder 33 respectively
It is dynamic to be clamped body both lateral sides by front and rear two groups of clamping waist wheels, before being respectively arranged with the rear and front end of the waist wheel carrier
Support roller and rear support roller, support roller effect are support bodys.
Cover plate is set on the clamping platform, intermediate frequency capacitor box and oil pressure cable and cable are installed on cover plate.
The front top of the clamping platform is provided with portal frame 8, is provided with mounting seat in the middle part of the portal frame, the mounting seat
It can realize and move up and down relatively by the left and right adjustment motor being arranged on portal frame and upper and lower adjustment motor, the intermediate frequency
Heating coil 9 is arranged on below the mounting seat, the medium-frequency heating coil is located at the exit of the clamping platform, system work
When, body is heated to 960 ° or so by medium-frequency heating coil.
The infrared laser temperature measuring equipment (not shown) towards body is provided with the portal frame, for measurement pipe
Body heating-up temperature.Temperature measuring point is 2 points of inner arc and outer arc, and temperature measurement signal enters PLC and the inside and outside permission temperature difference of computer settings is entered
Row comparison, PLC are interior to control with this by adjusting motor and upper and lower adjustment motor by left and right to control medium-frequency heating coil to move
The outer arc temperature difference is in prescribed limit.
, it is necessary to carry out Cooling Quenching to body after fire bending deformation, therefore spray cooling device (not shown) is set.
The nozzle flow of spray cooling device is controlled to adjust by PLC, last chilling temperature is adjusted, reaches technological requirement.
The rocker arm body includes rocker arm base 10, rocking arm 11, rocker shaft bed 12 and chuck 13, and the rocker arm base 10 is horizontal
To clamping platform outlet side is fixed on, the rocking arm 11 is rotatably arranged on rocker shaft bed 12, and the rocker shaft bed may move
Be arranged on rocker arm base on, rocker arm base side set radius adjust motor, the radius adjustment motor 34 passed by screw mandrel
Moving axis drives rocker shaft bed to be moved along rocker arm base, and rocker shaft bed is locked on rocker arm base by bolt, the chuck
Chuck locking cylinder 14 is set on 13, drives the mold on chuck to clamp body by the chuck locking cylinder 14.When rocking arm revolves
When going to the angle of bend of setting, stop bend pipe operation.
Because in BENDING PROCESS, meeting subtle flow is in vertical ellipse after bend loss shaping.Therefore, in the clamping
Platform inlet side is provided with predeformation heating coil 15, and sets upper and lower pressure roller, the upper pressure roller at predeformation heating coil rear
16 are arranged on upper pressing roller holder, and pressing roller holder is driven by down pressing oil cylinder 35 and can moved up and down on this.Added by above-mentioned predeformation
Heat coil is heated in front end and suppressed by pressure roller, and body raw material is first processed as into subtle flow in horizontal ellipse
Shape, hot-bending bends are entered back into, so as to lift the circularity of bend loss.
In Central Asia low temp area gas transmission project, the circularity requirement of its bend loss to 1422mm bore bend pipes is little
In 2.5%.Wherein, circularity=(Dmax-Dmin)/D；Dmax is the maximum outside diameter on bend pipe cross section, and Dmin is that bend pipe is transversal
Minimum outer diameter on face.
The hydraulic control system includes fuel tank 20 and the first oil pump 21, the second oil pump 22 and the 3rd that are connected with fuel tank
Oil pump 23, the first oil pump 21 are axial plunger pump, and the second oil pump 22 is vane pump, and the 3rd oil pump 23 is plunger pump.
For the oil-out of first oil pump 21 through the first reversal valve 24 and propelling cylinder UNICOM, the first reversal valve is electro-hydraulic commutation
Valve, the 3rd overflow valve 25 is connected between the oil-out of the first oil pump 21 and the first reversal valve.
The oil-out of second oil pump 22 and the first overflow valve 26 UNICOM, first overflow valve 26 are exported through the second commutation
Valve 27 and propelling cylinder UNICOM, the second reversal valve 27 is electro-hydraulic reversing valve.
The oil-out of 3rd oil pump 23 respectively with the 3rd reversal valve 28, the 4th reversal valve 29, the 5th reversal valve 30,
Six reversal valves 31, the oil inlet of the 7th reversal valve 32 and the second overflow valve 37 connect.The working oil of 3rd reversal valve 28
Mouth and the UNICOM of clamping cylinder 33, actuator port and radius adjustment motor 34 UNICOM, the institute of the 4th reversal valve 29
State the actuator port of the 5th reversal valve 30 and the UNICOM of chuck locking cylinder 14, the actuator port of the 6th reversal valve 31 with
The material folding oil cylinder UNICOM, the actuator port of the 7th reversal valve 32 and the UNICOM of down pressing oil cylinder 35.
The electric control system selects the computer supervisory control system of Siemens S7-200PLC and industrial computer main control device,
Electric control system block diagram is as shown in Figure 4.
Control system is controlled from the template type programmable controller S7-200 series of PLC of Siemens Company, there is a PLC
Cabinet forms, and is communicated between PLC and operating desk switch board using PROFIBUS-DP modes.
Referring to Fig. 5, host computer, as host computer configuration software, completes ipc monitor using the WINCC of Siemens Company
The design at interface, to the monitoring in real time of the data such as heating-up temperature and fltting speed and storage.
Fig. 6 show electric control system hardware structure diagram.Slave computer is served as by PLC, is responsible for detecting spot sensor
To signal be sent to host computer and carry out signal transacting, while it is existing that the control instruction of host computer is translated as execute instruction control again
The action of the executable element in field, so as to realize that system entirety automatic synchronization acts, complete bend pipe operation.Between industrial computer and PLC
Communication be to be realized by special PC/PPI cables, the communication between PLC and manipulation touch-screen is special by RS485/422
Cable is realized.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To be modified to the technical scheme described in previous embodiment, either which part or all technical characteristic are equal
Replace；And these modifications or replacement, the essence of appropriate technical solution is departed from the model of technical scheme of the embodiment of the present invention
Enclose, it all should cover among the claim of the present invention and the scope of specification.
Claims (9)
- A kind of 1. heavy caliber intelligence bending machine, it is characterised in that：Including propelling cylinder, rushing board mechanism, clamping platform and rocker arm body,The propelling cylinder is arranged on cylinder bracket, and propelling cylinder front end flange disk is connected with the rushing board mechanism,The rushing board mechanism includes base and material folding oil cylinder, and lower mold is set on the base, and material folding oil cylinder is being located at lower mold just Top, material folding oil cylinder lower end set upper mold, and the upper and lower mold pressing clamps body, and the base is slidably installed On guide rail, it can be driven along guide rail by propelling cylinder and moved along a straight line,The clamping platform is located in front of rushing board mechanism, and being symmetrically arranged in clamping platform has waist wheel carrier, left side waist wheel carrier and right side The relative inner of waist wheel carrier is respectively arranged with two clamping waist wheels, before the two waists wheel carrier can be driven through by clamping cylinder respectively Two groups of clamping waist wheels clamp body both lateral sides afterwards, and support roller is with after before being respectively arranged with the rear and front end of the waist wheel carrier Support roller, medium-frequency heating coil is set in the exit of the clamping platform,The rocker arm body includes rocker arm base, rocking arm, rocker shaft bed and chuck, and the rocker arm base is secured transverse to clamping platform Side is exported, the rocking arm is rotatably arranged on rocker shaft bed, and the rocker shaft bed is moveably mounted on rocker arm base, Radius is set to adjust motor in rocker arm base side, the radius adjusts motor and drives rocker shaft bed along rocking arm by screw rod transmission axle Pedestal is moved, and rocker shaft bed is locked on rocker arm base by bolt, and chuck locking cylinder is set on the chuck, is passed through The chuck locking cylinder drives the mold clamping body on chuck.
- 2. heavy caliber intelligence bending machine according to claim 1, it is characterised in that：It is provided with the clamping platform inlet side Predeformation heating coil, and upper and lower pressure roller is set at predeformation heating coil rear, the upper pressure roller is arranged on upper pressing roller holder On, pressing roller holder can be moved up and down by down pressing oil cylinder driving on this.
- 3. heavy caliber intelligence bending machine according to claim 2, it is characterised in that：Also include hydraulic control system, it is described Hydraulic control system includes fuel tank and the first oil pump, the second oil pump and the 3rd oil pump that are connected with fuel tank, first oil pump Oil-out is through the first reversal valve and propelling cylinder UNICOM, second oil pump out of the mouth and the first overflow valve UNICOM, and described first Overflow valve outlet through the second reversal valve and propelling cylinder UNICOM, the oil-out of the 3rd oil pump respectively with the 3rd reversal valve, The oil inlet connection of four reversal valves, the 5th reversal valve, the 6th reversal valve, the 7th reversal valve, the working oil of the 3rd reversal valve Mouth and the clamping cylinder UNICOM, actuator port and the radius adjustment motor UNICOM of the 4th reversal valve, the described 5th The actuator port of reversal valve and the chuck locking cylinder UNICOM, actuator port and the material folding oil cylinder of the 6th reversal valve UNICOM, actuator port and the down pressing oil cylinder UNICOM of the 7th reversal valve.
- 4. heavy caliber intelligence bending machine according to claim 3, it is characterised in that：3rd oil pump out of the mouth is also connected with There is the second overflow valve, first oil pump out of the mouth is also associated with the 3rd overflow valve.
- 5. heavy caliber intelligence bending machine according to claim 1, it is characterised in that：Set in the front top of the clamping platform Portal frame is equipped with, mounting seat is provided with the middle part of the portal frame, the mounting seat can adjust electricity by the left and right being arranged on portal frame Machine and up and down adjustment motor are realized to be moved up and down relatively, and the medium-frequency heating coil is arranged on below the mounting seat, makes this Medium-frequency heating coil is located at the exit of the clamping platform.
- 6. heavy caliber intelligence bending machine according to claim 5, it is characterised in that：Direction is provided with the portal frame The infrared laser temperature measuring equipment of body.
- 7. heavy caliber intelligence bending machine according to claim 1, it is characterised in that：Also include spray cooling device.
- 8. heavy caliber intelligence bending machine according to claim 1, it is characterised in that：Cover plate is set on the clamping platform, covered Intermediate frequency capacitor box and oil pressure cable and cable are installed on plate.
- 9. heavy caliber intelligence bending machine according to claim 6, it is characterised in that：The infrared laser temperature measuring equipment is to pipe The temperature measuring point of body is 2 points of inner arc and outer arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710999016.1A CN107716647A (en) | 2017-10-23 | 2017-10-23 | Heavy caliber intelligence bending machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710999016.1A CN107716647A (en) | 2017-10-23 | 2017-10-23 | Heavy caliber intelligence bending machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107716647A true CN107716647A (en) | 2018-02-23 |
Family
ID=61213404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710999016.1A Withdrawn CN107716647A (en) | 2017-10-23 | 2017-10-23 | Heavy caliber intelligence bending machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107716647A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109482687A (en) * | 2018-10-17 | 2019-03-19 | 北京市机械施工有限公司 | A kind of major-diameter thick-wall steel pipe simmering and bending processing method and system |
| CN110695160A (en) * | 2019-11-11 | 2020-01-17 | 苏师大半导体材料与设备研究院(邳州)有限公司 | Small-curvature-radius induction heating pipe bender |
-
2017
- 2017-10-23 CN CN201710999016.1A patent/CN107716647A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109482687A (en) * | 2018-10-17 | 2019-03-19 | 北京市机械施工有限公司 | A kind of major-diameter thick-wall steel pipe simmering and bending processing method and system |
| CN110695160A (en) * | 2019-11-11 | 2020-01-17 | 苏师大半导体材料与设备研究院(邳州)有限公司 | Small-curvature-radius induction heating pipe bender |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20180223 |