CN107008838A - A kind of countersunk head hexagon socket head cap screw manufacturing process - Google Patents
A kind of countersunk head hexagon socket head cap screw manufacturing process Download PDFInfo
- Publication number
- CN107008838A CN107008838A CN201710458897.6A CN201710458897A CN107008838A CN 107008838 A CN107008838 A CN 107008838A CN 201710458897 A CN201710458897 A CN 201710458897A CN 107008838 A CN107008838 A CN 107008838A
- Authority
- CN
- China
- Prior art keywords
- countersunk head
- upsetting
- manufacturing process
- cap screw
- hexagon socket
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/08—Upsetting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/44—Making machine elements bolts, studs, or the like
- B21K1/46—Making machine elements bolts, studs, or the like with heads
- B21K1/463—Making machine elements bolts, studs, or the like with heads with recessed heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/44—Making machine elements bolts, studs, or the like
- B21K1/46—Making machine elements bolts, studs, or the like with heads
- B21K1/50—Trimming or shearing formed heads, e.g. working with dies
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention provides a kind of countersunk head hexagon socket head cap screw manufacturing process, comprise the following steps：First upsetting：Open after the heating system of multistation temperature upsetting machine, blank heating, on the first station of multistation temperature upsetting machine, blank is subjected to just upsetting, countersunk head upsetting pressure is gone out into a conical pit；Smart upsetting：On second station of multistation temperature upsetting machine, using interior six sides assembling die along punching press at conical pit, conical pit is struck out into interior hexagonal hole, by backward extrusion full of model cavity up and down, finished product is obtained.Countersunk head hexagon socket head cap screw manufacturing process of the present invention has the advantage that：The directly continuous upsetting pressure shaping of hexagonal hole, different from the method for single-piece upsetting pressure after fracture, can be greatly improved the processing efficiency of bolt, increase the service life, reduce cost in head.
Description
Technical field
The invention belongs to the upsetting pressure manufacture field of fastener, and in particular to one kind presses definite shape using multistation temperature upsetting machine
After first upsetting shaping, the process of countersunk head hexagon socket head cap screw blank is gone out using the special interior final upsetting pressure of six sides assembling die.
Background technology
Countersunk head hexagon socket head cap screw is that hexagonal structure can provide high intensity and pull in a kind of unique high-intensity fasteners, its head
Performance is twisted, is pursued in modern aerospace field under high maneuverability, the background of high reliability, countersunk head hexagon socket head cap screw shows it
Exclusive advantage.But, because using materials such as high strength alloy steel, high temperature alloys, the deformation of upsetting system is anti-more than countersunk head hexagon socket head cap screw
Power is big, and interior hexagonal shaping practical distortion amount is big.Therefore, upsetting molding jig service life is low, and production cost is higher.It is presently used for upsetting
The mould of hex head fastener, is commonly monolithic mold and spring jacket type assembling die in system.Monolithic mold is primarily present
Six square tail portion stress concentrations, the low problem of service life, are restricted in use cost and efficiency.Spring jacket type combination die
There is combination complexity, red needle in tool, application is smaller again.
The content of the invention
The present invention is solves the problems of the prior art there is provided a kind of countersunk head hexagon socket head cap screw manufacturing process, with adding
The advantages of work efficiency high, die life are longer, red needle set is reusable, interior six sides press depth is adjustable.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of countersunk head hexagon socket head cap screw manufacturing process, comprises the following steps：
Step A, first upsetting：Open after the heating system of multistation temperature upsetting machine, blank heating, the first of multistation temperature upsetting machine
On station, blank is subjected to just upsetting, by countersunk head upsetting pressure into leading section and rearward end, the side of leading section is coned face, front end
The end face in portion stamps out a conical pit, and the side of the rearward end of countersunk head is bearing-surface；
Step B, smart upsetting：On second station of multistation temperature upsetting machine, using interior six sides assembling die along punching press at conical pit,
Conical pit is struck out into interior hexagonal hole, by backward extrusion full of model cavity up and down, finished product is obtained, the end face of the countersunk head of finished product is flat
Face, is sideways taper surface.
It is preferred that, in the step A, the end face of leading section is circle, the 0.7~0.9 of a diameter of countersunk head maximum outside diameter, it is excellent
Elect 0.8 as.
It is preferred that, in the step A, the heating power of the heating system of multistation temperature upsetting machine is set as 300~500W, excellent
Elect 350W as.
It is preferred that, the angle of the coned face of the leading section is 120 °~150 °, and optimized angle is 140 °.
It is preferred that, 0.8~1, preferably the 0.9 of the end face diameter of near coal-mine a diameter of leading section of the conical pit.
It is preferred that, the depth of the conical pit is 1.0mm~1.8mm, preferably 1.4mm.
It is preferred that, the angle of the bearing-surface is 0.8~0.9, preferably the 0.8 of the taper surface angle of the countersunk head of finished product.
It is preferred that, interior six side's assembling dies include six side's red needles and red needle set, and the inserting of six side's red needles is interior to red needle set.
It is preferred that, the six sides red needle includes being integrally formed protrusion round platform, fix bar and the drift set gradually, red needle set
Provided with through hole, one end of through hole is provided with the cylindrical mold cavity coordinated with prominent round platform, fix bar and the red needle set of six side's red needles
Through hole is interference fitted, and drift stretches out one end of red needle set, and prominent round platform is caught in cylindrical type intracavitary completely.
It is preferred that, in addition to step C, the end face of countersunk head and the joint turning of side have annular edge.
Relative to prior art, countersunk head hexagon socket head cap screw manufacturing process of the present invention has the advantage that：In head
The directly continuous upsetting pressure shaping of hexagonal hole, different from the method for single-piece upsetting pressure after fracture, can be greatly improved the processing efficiency of bolt.
In addition, in interior six sides assembling die, six side's red needle service lifes about 3500, red needle set service life is estimated more than 30,000, punching
Reusable more than 10 times of needle guard；Six side's assembling die prices are about 110% of six side's Die prices in monoblock type in a set of,
Six side's red needles are about 70% of six side's Die prices in monoblock type, are calculated through statistics, are purchased using interior six sides assembling die saving
Cost is the 20%~40% of monolithic mold price.
Brief description of the drawings
The accompanying drawing for constituting the part of the present invention is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate to be used to explain the present invention, do not constitute inappropriate limitation of the present invention.In the accompanying drawings：
The countersunk head hexagon socket head cap screw finished product structure schematic diagram that Fig. 1 needs to process for the present invention；
Fig. 2 is Fig. 1 left view；
Fig. 3 is the structural representation of first upsetting blank；
Fig. 4 is Fig. 3 left view；
Fig. 5 is the structural representation of smart upsetting blank；
Fig. 6 is Fig. 5 left view；
Fig. 7 is the structural representation of interior six side's assembling dies；
Fig. 8 is Fig. 7 left view；
Fig. 9 is Fig. 8 A-A faces sectional view；
Figure 10 is the structural representation of six side's red needles；
Figure 11 is Figure 10 right view；
Figure 12 is the structural representation that red needle covers；
Figure 13 is Figure 12 left view；
Figure 14 is the structural representation of first stamping die die cavity；
Description of reference numerals：
1- countersunk heads；Hexagonal hole in 2-；3- conical pits；4- leading sections；5- rearward ends；The first stamping die die cavities of 6-；7- red needle sets；
8- drifts；9- fix bars；10- protrudes round platform；11- through holes；12- cylindrical mold cavities.
Embodiment
It should be noted that in the case where not conflicting, the embodiment in the present invention and the feature in embodiment can phases
Mutually combination.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " on ", " under ",
The orientation or position relationship of the instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than indicate or dark
Specific orientation must be had, with specific azimuth configuration and operation by showing the device or element of meaning, therefore it is not intended that right
The limitation of the present invention.In addition, term " first ", " second " etc. are only used for describing purpose, and it is not intended that indicating or implying phase
To importance or the implicit quantity for indicating indicated technical characteristic.Thus, the feature for defining " first ", " second " etc. can
To express or implicitly include one or more this feature.In the description of the invention, unless otherwise indicated, " multiple "
It is meant that two or more.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood by concrete condition
Concrete meaning in the present invention.
Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
By taking the upsetting pressure blank for manufacturing structure as shown in Figure 1 as an example.The product processes countersunk head 1, interior hexagonal hole in upsetting
2。
As shown in Fig. 2-14, a kind of countersunk head hexagon socket head cap screw manufacturing process comprises the following steps：
Step A, first upsetting：The heating system of multistation temperature upsetting machine is opened, heating power is set as 300~500W, be preferably
350W.After blank heating, on the first station of multistation temperature upsetting machine, blank is subjected to just upsetting, by the upsetting pressure of countersunk head 1 into leading section
4 and rearward end 5, the side of leading section 4 is coned face, and the angle of coned face is 120 °~150 °, and optimized angle is 140 °.
The end face of leading section is circle, 0.7~0.9, preferably the 0.8 of a diameter of maximum outside diameter of countersunk head 1.The end face of leading section 4 is by first
Stamping die die cavity 6 stamps out a conical pit 3, and the 0.8~1 of the end face diameter of near coal-mine a diameter of leading section 4 of conical pit 3, it is excellent
Elect 0.9 as.First stamping die die cavity 6 is as shown in figure 14.The depth of the conical pit 3 is 1.0mm~1.8mm, preferably 1.4mm.
The side of the rearward end 5 of countersunk head 1 is bearing-surface, the angle of the bearing-surface for the taper surface angle of the countersunk head 1 of finished product 0.8~
0.9, preferably 0.8.Interior hexagonal punch forming when the first upsetting base footpath that so upsetting is made is conducive to smart upsetting.
Step B, smart upsetting：On second station of multistation temperature upsetting machine, rushed using interior six sides assembling die along conical pit 3
Pressure, interior hexagonal hole 2 is struck out by conical pit 3, by backward extrusion full of model cavity up and down, obtains finished product, the end of the countersunk head 1 of finished product
Face is plane, is sideways taper surface.
Step C, taper surface has annular edge with the turning of end face joint, and is further processed into by concerned process steps such as Fig. 1
Shown finished product.
The end face of interior six sides assembling die claps the end face of pressed compact part countersunk head 1, keeps the end face of countersunk head 1 smooth.
Wherein, interior six sides assembling die is included in six side's red needles and red needle set 7, six side's red needles inserting to red needle set 7.It is described
Six side's red needles include being integrally formed the protrusion round platform 10 set gradually, fix bar 9 and drift 8, and red needle set 7 is provided with through hole 11, led to
The one end in hole 11 is provided with the cylindrical mold cavity 12 coordinated with prominent round platform 10, it is to avoid larger stress concentration.Cylindrical mold cavity 12 is straight
Footpath is about the prominent diameter 105% of round platform 10, the depth of cylindrical mold cavity 12 and the consistency of thickness of prominent round platform 10.The side of drift 8
Face is six aspect acting surfaces.
The through hole 11 that the fix bar 9 of six side's red needles covers 7 with red needle is interference fitted, the magnitude of interference 1 ‰~3 ‰, and drift 8 stretches out punching
One end of needle guard 7, with the circular sliding slopes of R=1.2~1.5 between the afterbody of fix bar 9 and prominent round platform 10, it is to avoid larger stress
Concentrate.Prominent round platform 10 is caught in cylindrical mold cavity 12 completely, after six side's red needles press-in red needle set 7, prominent round platform 10 and punching
The cylindrical mold cavity 12 of needle guard 7 is contacted, fixed.
Fix bar 9 is supporting part close to the part of drift 8, if the six deeper products of side's depth in need to processing, can pass through car
End face of the red needle set 7 close to six aspect acting surface one end is cut, the length of the T shown in Fig. 7 is lengthened, T is that end face and six aspects are acted on
Most short straight line distance between face.
In Figure 10, m is interior position between six side's acting surfaces and n faces, and n is the horizontal plane on supporting part.Should be with wherein m
Circular arc R transition, reduces resistance of the red needle in withdrawal process, reduction red needle broken end probability.Six side's opposite side spacing dimensions are about at n
The 99% of six aspect acting surface opposite side spacing dimensions, strengthens support strength, it is ensured that red needle will not fracture during punching, and will not improve
Frictional resistance；Six aspect acting surface length are 0.8~1.5mm, reducing friction resistance.
Process as shown in Figure 5 interior respectively using six side's moulds in interior six sides assembling die, monoblock type in the process of the present invention
Hex bolts blank, and contrast and change the old technology for just rushing hexagonal product in shape and single-piece work and verify various method effects,
As a result it is as shown in table 1.
1 four kinds of processing method contrast tables of table
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God is with principle, and any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (10)
1. a kind of countersunk head hexagon socket head cap screw manufacturing process, it is characterised in that：Comprise the following steps：
Step A, first upsetting：Open after the heating system of multistation temperature upsetting machine, blank heating, in the first station of multistation temperature upsetting machine
On, blank is subjected to just upsetting, by countersunk head (1) upsetting pressure into leading section (4) and rearward end (5), the side of leading section (4) is cone
Face, the end face of leading section (4) stamps out a conical pit (3), and the side of the rearward end (5) of countersunk head (1) is bearing-surface；
Step B, smart upsetting：On second station of multistation temperature upsetting machine, using interior six sides assembling die along conical pit (3) place's punching press,
Conical pit (3) is struck out into interior hexagonal hole (2), by backward extrusion full of model cavity up and down, finished product, the countersunk head (1) of finished product is obtained
End face be plane, be sideways taper surface.
2. countersunk head hexagon socket head cap screw manufacturing process according to claim 1, it is characterised in that：In the step A, leading section
(4) end face is circle, 0.7~0.9, preferably the 0.8 of a diameter of countersunk head (1) maximum outside diameter.
3. countersunk head hexagon socket head cap screw manufacturing process according to claim 1, it is characterised in that：In the step A, multistation
The heating power of the heating system of warm upsetting machine is set as 300~500W, preferably 350W.
4. countersunk head hexagon socket head cap screw manufacturing process according to claim 1, it is characterised in that：The circle of the leading section (4)
The angle of taper surface is 120 °~150 °, and optimized angle is 140 °.
5. countersunk head hexagon socket head cap screw manufacturing process according to claim 1, it is characterised in that：The hole of the conical pit (3)
0.8~1, preferably the 0.9 of the end face diameter of a diameter of leading section (4) of mouth.
6. countersunk head hexagon socket head cap screw manufacturing process according to claim 1, it is characterised in that：The depth of the conical pit (3)
Spend for 1.0mm~1.8mm, preferably 1.4mm.
7. countersunk head hexagon socket head cap screw manufacturing process according to claim 1, it is characterised in that：The angle of the bearing-surface is
0.8~0.9, preferably the 0.8 of the taper surface angle of the countersunk head (1) of finished product.
8. countersunk head hexagon socket head cap screw manufacturing process according to claim 1, it is characterised in that：Six side's assembling dies in described
Including six side's red needles and red needle set (7), the inserting of six side's red needles is interior to red needle set (7).
9. countersunk head hexagon socket head cap screw manufacturing process according to claim 8, it is characterised in that：The six sides red needle includes one
The body formed protrusion round platform (10) set gradually, fix bar (9) and drift (8), red needle set (7) are provided with through hole (11), through hole
(11) one end is provided with the cylindrical mold cavity (12) coordinated with prominent round platform (10), fix bar (9) and the red needle set of six side's red needles
(7) through hole (11) interference fit, drift (8) stretches out one end of red needle set (7), and prominent round platform (10) is caught in cylindrical type completely
In chamber (12).
10. countersunk head hexagon socket head cap screw manufacturing process according to claim 1, it is characterised in that：Also include step C, countersunk head
(1) end face and the joint turning of side has annular edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710458897.6A CN107008838A (en) | 2017-06-16 | 2017-06-16 | A kind of countersunk head hexagon socket head cap screw manufacturing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710458897.6A CN107008838A (en) | 2017-06-16 | 2017-06-16 | A kind of countersunk head hexagon socket head cap screw manufacturing process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107008838A true CN107008838A (en) | 2017-08-04 |
Family
ID=59452746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710458897.6A Pending CN107008838A (en) | 2017-06-16 | 2017-06-16 | A kind of countersunk head hexagon socket head cap screw manufacturing process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107008838A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108273919A (en) * | 2018-04-21 | 2018-07-13 | 海盐恒欣宇模具有限责任公司 | A kind of diel of vapour mark screw mold and its processing method |
| CN111390084A (en) * | 2020-04-08 | 2020-07-10 | 杭州萧山钱江电声器材有限公司 | T iron preparation device and preparation method |
| CN113399950A (en) * | 2021-07-13 | 2021-09-17 | 安徽长江紧固件有限责任公司 | Production process of large-hexagon high-strength bolt with pre-loaded calibration stress |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1978371A (en) * | 1931-06-04 | 1934-10-23 | Holo Krome Screw Corp | Cold formed socketed or hollow screw and method of and apparatus for making the same |
| US2238960A (en) * | 1938-09-01 | 1941-04-22 | Waterbury Farrel Foundry Co | Method of producing socketed articles |
| US2285462A (en) * | 1939-05-26 | 1942-06-09 | Holo Krome Screw Corp | Method of and apparatus for making socketed screws |
| CN201516487U (en) * | 2009-11-04 | 2010-06-30 | 浙江明泰标准件有限公司 | Punch rod with quincunx shape inside |
| CN102601215A (en) * | 2012-03-08 | 2012-07-25 | 苏州新凌高强度紧固件有限公司 | Screw socket hexagon punching die |
| CN104801652A (en) * | 2015-04-09 | 2015-07-29 | 鹏驰五金制品（昆山）有限公司 | Cold-upsetting processing technique for inside hexagonal bolt |
| CN205043005U (en) * | 2015-09-25 | 2016-02-24 | 河南航天精工制造有限公司 | Interior hexagonal hole stamping die |
| CN105983817A (en) * | 2015-01-30 | 2016-10-05 | 重庆沁煌机械制造有限公司 | Socket head cap screw processing technology |
-
2017
- 2017-06-16 CN CN201710458897.6A patent/CN107008838A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1978371A (en) * | 1931-06-04 | 1934-10-23 | Holo Krome Screw Corp | Cold formed socketed or hollow screw and method of and apparatus for making the same |
| US2238960A (en) * | 1938-09-01 | 1941-04-22 | Waterbury Farrel Foundry Co | Method of producing socketed articles |
| US2285462A (en) * | 1939-05-26 | 1942-06-09 | Holo Krome Screw Corp | Method of and apparatus for making socketed screws |
| CN201516487U (en) * | 2009-11-04 | 2010-06-30 | 浙江明泰标准件有限公司 | Punch rod with quincunx shape inside |
| CN102601215A (en) * | 2012-03-08 | 2012-07-25 | 苏州新凌高强度紧固件有限公司 | Screw socket hexagon punching die |
| CN105983817A (en) * | 2015-01-30 | 2016-10-05 | 重庆沁煌机械制造有限公司 | Socket head cap screw processing technology |
| CN104801652A (en) * | 2015-04-09 | 2015-07-29 | 鹏驰五金制品（昆山）有限公司 | Cold-upsetting processing technique for inside hexagonal bolt |
| CN205043005U (en) * | 2015-09-25 | 2016-02-24 | 河南航天精工制造有限公司 | Interior hexagonal hole stamping die |
Non-Patent Citations (1)
| Title |
|---|
| 李英亮: "《紧固件概论》", 31 January 2014, 国防工业出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108273919A (en) * | 2018-04-21 | 2018-07-13 | 海盐恒欣宇模具有限责任公司 | A kind of diel of vapour mark screw mold and its processing method |
| CN108273919B (en) * | 2018-04-21 | 2024-03-19 | 海盐恒欣宇模具有限责任公司 | Stamping die of gas mark screw die and processing method thereof |
| CN111390084A (en) * | 2020-04-08 | 2020-07-10 | 杭州萧山钱江电声器材有限公司 | T iron preparation device and preparation method |
| CN113399950A (en) * | 2021-07-13 | 2021-09-17 | 安徽长江紧固件有限责任公司 | Production process of large-hexagon high-strength bolt with pre-loaded calibration stress |
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Application publication date: 20170804 |