CN108098272A - A kind of hole processing method - Google Patents
A kind of hole processing method Download PDFInfo
- Publication number
- CN108098272A CN108098272A CN201711369988.9A CN201711369988A CN108098272A CN 108098272 A CN108098272 A CN 108098272A CN 201711369988 A CN201711369988 A CN 201711369988A CN 108098272 A CN108098272 A CN 108098272A
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- Prior art keywords
- tapping
- gear
- blank
- drive
- hole
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Press Drives And Press Lines (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
A kind of hole processing method, includes the following steps step A, a tapping device is provided in progressive die, step B, when material strip is sent to the tapping device of step A offers in progressive die, screw thread process operation is completed in tapping device operation.A kind of hole processing method provided by the present invention in the punching course of progressive die, it can be achieved that complete screw thread process, so as to beneficial to the manless production for realizing high-precision motor rotor installation housing.
Description
Technical field
The present invention relates to machinery manufacturing technology field, more particularly to a kind of horizontal direction completed in progressive die to blank
With the method for the hole processing of vertical direction.
Background technology
Motor mounting shell is typically to be process by plate by punching process, and Fig. 1 is a kind of motor mounting shell
Principle schematic diagram；Fig. 2 is the A-A revolved section principle schematic diagrams of Fig. 1；Fig. 3 is the B of Fig. 1 to visual angle schematic diagram；Ginseng
As shown in Fig. 1-3, the 1 type face of motor mounting shell is more complicated, is the tubular construction of bottom opening, there are one water for side wall setting
Flat thread hole 11, shirt rim 100 is provided with multiple through holes 12 and step threaded hole 13, and 100 outer of shirt rim is provided with multiple notches,
Top surface is provided with mounting hole 14, kidney slot 15 and recessed portion 16, and top surface is provided centrally with stepped hole 17.
The existing manufacturing method of above-mentioned motor mounting shell shapes for single mold Multi-step forming, and Fig. 4 is shown in FIG. 1 electronic
The existing manufacturing process principle schematic of machine mounting shell shows the base that each work step is completed in existing manufacturing process in Fig. 4
The overlooking the structure diagram of part and the revolved section structure diagram of corresponding A-A positions as shown in Figs. 1-2, referring to Fig. 4 institutes
Show, existing manufacturing process is divided into 12 work steps, is followed successively by：Blanking → drawing → reverse drawing → drawing → thick whole → finishing → is cut
Side → punching → hole flanging → rushes side opening → bottom surface tapping → side tapping.Used 12 molds, the mold purposes of each work step according to
It is secondary to be described as follows：
Blanking die：Prepare circular slab.
First cupping tool：Formed cylinder body main structure.
Reverse redrawing mold, the second cupping tool, thick reshaping die, finishing mold：Top surface type face is molded, that is, is molded the recess
It portion 16 and prepares for the stepped hole 17.
Shaving die：It is molded the notch of shirt rim 100.
Punching die：Forming through hole 12, mounting hole 14, kidney slot 15, stepped hole 17.
Hole flanging mold：It is molded the step base hole of step threaded hole 13.
Side opening punching die has：The base hole of constitutive levels threaded hole 11.
Bottom surface tapping mold：It is molded step threaded hole 13.
Side tapping mold：Constitutive levels threaded hole 11.
Existing manufacturing method needs more operator, and labor productivity is low, except rushing side opening, bottom surface tapping and side
Tapping these three work steps in face do not use impact style to realize, such as bottom surface tapping and side tapping the two work steps are to consolidate blank
Surely it is placed on mold and carries out tapping with threading apparatus again.Other work steps are processed using impact style, in product punching course
In be affected by human factors larger (manual feeding), it is difficult to ensure motor stator rotor installation housing finished size qualification rate.
Progressive die is multitask progressive die, in a secondary mold, can include punching, brake forming and stretching etc. are a variety of
Multiple working procedure has very high productivity.
For the motor mounting shell of Fig. 1, in existing manufacturing process remove rush side opening, bottom surface tapping and side tapping this
Other nine work steps outside three work steps easily can be designed as one by carrying out simple transformation to existing work step mold
Progressive die is covered, but due to being generally not provided screw thread process ability in existing grading mold technique, how will rush side opening, bottom
Face tapping and side tapping these three work steps, particularly the bottom surface tapping of thread mill drilling and side tapping the two work steps are integrated
Enter progressive die, with regard to becoming letter problem to be solved.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of hole processing methods, are formerly mentioned with being reduced or avoided
The problem of.
In order to solve the above technical problems, the present invention proposes a kind of hole processing method, it is right in progressive die to be used for
Motor mounting shell 1 carries out hole processing, and the motor mounting shell is the tubular construction of bottom opening, and side wall is provided with one
A horizontal threaded bore, shirt rim is provided with multiple through holes and step threaded hole, and shirt rim outer is provided with multiple notches, and top surface is set
There are mounting hole, kidney slot and recessed portion, top surface is provided centrally with stepped hole, and described method includes following steps
Step A, in progressive die provide a tapping device, the tapping device 5 it include mold and tapping under tapping
Mold, what the tapping mold included blank compress positioning passes through upper pneumatic bomb with the cope plate of progressive die
The upper compressing member of spring connection, the driving screw rod being fixedly connected with cope plate, the first nitrogen gas spring, mold includes using under the tapping
In the lower support element being fixedly connected with the lower template of progressive die positioned to blank, connected with lower template by lower pneumatic spring
It is connecing and with the retainer plate of the lower support element slidable connection, the side tapping pedestal being fixedly connected with lower template, with lower template
It is being connected by Rectangular Spring and with the tapping bearing of the side tapping pedestal slidable connection, the retainer plate bottom, which is fixed, to be connected
It is connected at least one first drive screw, the lower template, which is provided with, corresponding with first drive screw is provided with center spiral shell
First transmission gear of pit, for processing the first tapping screw tap of the step threaded hole, the first tapping screw tap passes through
First driven wheel is connected with first transmission gear；The tapping bearing is provided with horizontally movable second tapping screw tap,
The second tapping screw tap is socketed in a first vertical gear, and the first vertical gear is nibbled with a second vertical gear
It closes, the second vertical gear is provided with coaxial first level with one by a first coaxial vertical bevel gear and bores tooth
The first level transmission gear connection of wheel, the first vertical bevel gear engage with first level bevel gear, the first level transmission
Gear is engaged by second intermediate gear with second drive, and second drive is provided centrally with and the master
The corresponding threaded hole of dynamic screw rod.The upper pneumatic spring quantity is 3, and load is 3200 Ns, and the lower pneumatic spring quantity is 4
A, load is 1700 Ns, and the first nitrogen gas spring quantity is 2, and load is 3200 Ns, and the Rectangular Spring quantity is 2,
Load is 400 Ns.
Step B, when material strip is sent to the tapping device of step A offers in progressive die, tapping process is to work as upper mold
When plate is run downwards under punching machine effect, upper compressing member is contacted with blank top surface, and compressing blank is run downwards, be that is to say and is passed through institute
It states pneumatic spring and oppresses retainer plate simultaneously and run downwards, while the first nitrogen gas spring is oppressed the tapping bearing and is run downwards,
In downward operational process, the driving screw rod will not promote second drive to rotate.
After blank is inserted in the lower support element, the retainer plate in downward operational process, the first drive screw to
Bottom offset can drive the first transmission gear to rotate by the screwed hole of centre of the first transmission gear, so as to via the first driven wheel band
Dynamic first tapping screw tap rotation, blank continues to move down after contacting with the first tapping screw tap, that is, the first tapping screw tap phase
Blank is moved upwards, so as to complete the tapping of step threaded hole,
When the upper compressing member is moved into place, it that is to say that the upper compressing member is completed to stablize with the lower support element to blank
After clamping, for blank downwards completely into lower support element and by after fixation, the lower pneumatic spring stops deformation, the tapping bearing
The relative displacement that position stops vertical direction with lower template also is moved into, at this point, the upper pneumatic spring continues to deform, that is, institute
It states cope plate and continues displacement, first nitrogen gas spring also continues to deform, and the driving screw rod is promoted to move downward, the active
The linear motion of screw rod drives the rotation of the second drive, and successively via the second intermediate gear, the first level transmission gear,
First level bevel gear, the first vertical bevel gear, the second vertical gear drive the first vertical gear rotation, so as to convert again
The horizontal rotation feed motion of 11 position of horizontal threaded bore is corresponded on blank for the second tapping screw tap, so as to complete to water
The tapping in flat thread hole.
During the cope plate is run up, the inverse operation of the above process is finally completed hole processing operation.
A kind of hole processing method provided by the present invention adds, it can be achieved that completing screw thread in the punching course of progressive die
Work, so as to beneficial to the manless production for realizing high-precision motor rotor installation housing, greatly reduce to pressman and punching
Press the demand of equipment.Production efficiency greatly improves, remarkable in economical benefits.Simultaneously because eliminating the destabilizing factors shadow such as manual operation
It rings, improves product manufacturing precision and quality stability.
Description of the drawings
The following drawings is only intended to, in doing schematic illustration and explanation to the present invention, not delimit the scope of the invention.Wherein,
Fig. 1 is a kind of principle schematic diagram of motor mounting shell；
Fig. 2 is the A-A revolved section principle schematic diagrams of Fig. 1；
Fig. 3 is the B of Fig. 1 to visual angle schematic diagram；
Fig. 4 is the existing manufacturing process principle schematic of motor mounting shell shown in FIG. 1；
Fig. 5 is to be illustrated according to a kind of sectional structure principle of hole processing method of the specific embodiment of the present invention
Figure.
Specific embodiment
In order to which the technical features, objects and effects to the present invention are more clearly understood, now control illustrates this hair
Bright specific embodiment.Wherein, identical component uses identical label.
Fig. 1 is a kind of principle schematic diagram of motor mounting shell；The A-A revolved section structural principles that Fig. 2 is Fig. 1 show
It is intended to；Fig. 3 is the B of Fig. 1 to visual angle schematic diagram；Fig. 5 is a kind of hole processing according to the specific embodiment of the present invention
The sectional structure principle schematic of method.In order to better illustrate the operation principle of tapping device provided by the present invention, in Fig. 5
Control simultaneously shows the horizontal part of four state of the tapping device used in the method for the present invention from die sinking to mold closing process
Point sectional structure principle schematic and vertical component sectional structure principle schematic, referring to shown in Fig. 1-3,5, the present invention provides
A kind of hole processing method is used in progressive die carry out motor mounting shell 1 screw thread process, the motor installation
Shell 1 is the tubular construction of bottom opening, and side wall is set there are one horizontal threaded bore 11, and shirt rim 100 is provided with multiple 12 Hes of through hole
Step threaded hole 13, and 100 outer of shirt rim is provided with multiple notches, top surface is provided with mounting hole 14, kidney slot 15 and recess
Portion 16, top surface are provided centrally with stepped hole 17, and described method includes following steps
Step A, in progressive die provide a tapping device 5, the tapping device 5 it include mold and tapping under tapping
Mold, what the tapping mold included blank compress positioning passes through upper gas with the cope plate 201 of progressive die
The upper compressing member 51 of spring 21 of moving connection, the driving screw rod 52 being fixedly connected with cope plate 201, the first nitrogen gas spring 54 are described
Mold includes the lower support element 53 being fixedly connected with the lower template 202 of progressive die positioned to blank under tapping, with
It is that lower template 202 is connected by lower pneumatic spring 22 and with the retainer plate 300 ' of 53 slidable connection of lower support element, under
The side tapping pedestal 511 that template 202 is fixedly connected, it is being connected by Rectangular Spring 23 with lower template 202 and with the side tapping
The tapping bearing 512 of 511 slidable connection of pedestal, the 300 ' bottom of retainer plate are fixedly connected at least one first transmission spiral shell
Bar 301, the lower template 202 are provided with the first biography for being provided with screwed hole of centre corresponding with first drive screw 301
Moving gear 501, for processing the first tapping screw tap 503 of the step threaded hole 13, the first tapping screw tap 503 passes through
One driven wheel 502 is connected with first transmission gear 501；The tapping bearing 512 is provided with horizontally movable second and attacks
Tooth screw tap 513, the second tapping screw tap 513 are socketed in a first vertical gear 514, the first vertical gear 514
It is engaged with a second vertical gear 515, the second vertical gear 515 passes through a first coaxial vertical bevel gear 516
The first level transmission gear 518 that coaxial first level bevel gear 517 is provided with one is connected, the first vertical bevel gear
516 engage with first level bevel gear 517, and the first level transmission gear 518 passes through second intermediate gear 519 and one
A second drive 521 engages, and second drive 521 is provided centrally with and the 52 corresponding threaded hole of driving screw rod.
21 quantity of upper pneumatic spring is 3, and load is 3200 Ns, and lower 22 quantity of pneumatic spring is 4, load 1700
Ox, 54 quantity of the first nitrogen gas spring are 2, and load is 3200 Ns, and 23 quantity of Rectangular Spring is 2, load 400
Ox.
Step B, when material strip is sent to the tapping device 5 of step A offers in progressive die, tapping process is, when upper
Template 201 punching machine effect under run downwards when, upper compressing member 51 is contacted with blank top surface (i.e. material strip top surface), oppress blank to
Lower operation that is to say that oppressing retainer plate 300 by the upper pneumatic spring 21 runs downwards, while the first nitrogen gas spring 54 is oppressed
The tapping bearing 512 is run downwards, and in downward operational process, the driving screw rod 52 will not promote second drive
521 rotate.
After blank is inserted in lower support element 53, the retainer plate 300 is in downward operational process, the first drive screw
301 to bottom offset can by the screwed hole of centre of the first transmission gear 501 drive the first transmission gear 501 rotate, so as to pass through
By the first driven wheel 502 the first tapping screw tap 503 is driven to rotate, blank continues to move downwards after contacting with the first tapping screw tap 503
It moves, that is, 503 opposite blank of the first tapping screw tap moves upwards, so as to complete the tapping of step threaded hole 13,
In this embodiment, the shirt rim 100 of motor mounting shell 1 is along the circumferential direction uniformly arranged there are four step spiral shell
Pit 13, therefore, the 300 ' bottom of retainer plate are fixedly connected there are two the first drive screw 301, and the lower template 202 is set
There are two the first transmission gear 501, each first transmission gear 501 is engaged with two the first driven wheels 502, that is, each the
One transmission gear 501 drives two the first tapping screw taps 503.
When the upper compressing member 51 is moved into place, it that is to say that the upper compressing member 51 and the lower support element 53 are complete to blank
Into after stable holding, downwards completely into lower support element 53 and by after fixation, the lower pneumatic spring 22 stops blank (i.e. material strip)
It only deforms, the tapping bearing 512 also is moved into the relative displacement that position stops vertical direction with lower template 202, at this point, on described
Pneumatic spring 21 continues to deform, that is, the cope plate 201 continues displacement, and first nitrogen gas spring 54 also continues to deform,
The driving screw rod 52 is promoted to move downward, the linear motion of the driving screw rod 52 drives the second drive 521 to rotate, and according to
It is secondary to erect straight-conical teeth via the second intermediate gear 519, the first level transmission gear 518, first level bevel gear 517, first
Wheel 516, the second vertical gear 515 drive the first vertical gear 514 to rotate, so as to be converted to the second tapping screw tap again
513 correspond to the horizontal rotation feed motion of 11 position of horizontal threaded bore on blank, so as to complete attacking to horizontal threaded bore 11
Tooth.
During the cope plate 201 is run up, the inverse operation of the above process is finally completed hole processing operation.
A kind of hole processing method provided by the present invention adds, it can be achieved that completing screw thread in the punching course of progressive die
Work, so as to beneficial to the manless production for realizing high-precision motor rotor installation housing, greatly reduce to pressman and punching
Press the demand of equipment.Production efficiency greatly improves, remarkable in economical benefits.Simultaneously because eliminating the destabilizing factors shadow such as manual operation
It rings, improves product manufacturing precision and quality stability.
It will be appreciated by those skilled in the art that although the present invention is described in the way of multiple embodiments,
It is that not each embodiment only includes an independent technical solution.So narration is used for the purpose of for the sake of understanding in specification,
Those skilled in the art should consider the specification as a whole is understood, and by technical solution involved in each embodiment
The mode of different embodiments can be mutually combined into understand protection scope of the present invention by regarding as.
The foregoing is merely the schematical specific embodiments of the present invention, are not limited to the scope of the present invention.It is any
Those skilled in the art, equivalent variations, modification and the combination made on the premise of the design of the present invention and principle is not departed from,
The scope of protection of the invention should all be belonged to.
Claims (1)
- A kind of 1. hole processing method, which is characterized in that it is used in progressive die carry out threaded hole to motor mounting shell 1 Processing, the motor mounting shell are the tubular construction of bottom opening, and side wall is set there are one horizontal threaded bore, and shirt rim is provided with Multiple through holes and step threaded hole, and shirt rim outer is provided with multiple notches, top surface is provided with mounting hole, kidney slot and recess Portion, top surface are provided centrally with stepped hole, and described method includes following stepsStep A, in progressive die provide a tapping device, the tapping device 5 it include mold and tapping upper mold under tapping Tool, the tapping mold include blank is carried out to compress with the cope plate of progressive die by upper pneumatic spring connecting for positioning The upper compressing member connect, the driving screw rod being fixedly connected with cope plate, the first nitrogen gas spring, under the tapping mold include for pair The lower support element being fixedly connected with the lower template of progressive die that blank is positioned is connected with lower template by lower pneumatic spring And with the retainer plate of the lower support element slidable connection, the side tapping pedestal being fixedly connected with lower template passes through with lower template Rectangular Spring connection and with the tapping bearing of the side tapping pedestal slidable connection, the retainer plate bottom is fixedly connected with At least one first drive screw, the lower template, which is provided with, corresponding with first drive screw is provided with screwed hole of centre The first transmission gear, for processing the first tapping screw tap of the step threaded hole, the first tapping screw tap passes through first Driven wheel is connected with first transmission gear；The tapping bearing is provided with horizontally movable second tapping screw tap, described Second tapping screw tap is socketed in a first vertical gear, and the first vertical gear is engaged with a second vertical gear, The second vertical gear is provided with coaxial first level bevel gear by a first coaxial vertical bevel gear with one The connection of first level transmission gear, the first vertical bevel gear engages with first level bevel gear, the first level transmission tooth Wheel is engaged by second intermediate gear with second drive, and second drive is provided centrally with and the active The corresponding threaded hole of screw rod.The upper pneumatic spring quantity is 3, and load is 3200 Ns, and the lower pneumatic spring quantity is 4 A, load is 1700 Ns, and the first nitrogen gas spring quantity is 2, and load is 3200 Ns, and the Rectangular Spring quantity is 2, Load is 400 Ns.Step B, when material strip is sent to the tapping device of step A offers in progressive die, tapping process is, when cope plate exists During the lower operation downwards of punching machine effect, upper compressing member is contacted with blank top surface, is oppressed blank and is run downwards, that is to say by described Pneumatic spring is oppressed retainer plate and is run downwards simultaneously, while the first nitrogen gas spring is oppressed the tapping bearing and run downwards, to In lower operational process, the driving screw rod will not promote second drive to rotate.After blank is inserted in the lower support element, the retainer plate in downward operational process, the first drive screw to bottom Moving can drive the first transmission gear to rotate by the screwed hole of centre of the first transmission gear, so as to drive the via the first driven wheel One tapping screw tap rotates, and blank continues to move down after contacting with the first tapping screw tap, that is, the first tapping screw tap is with respect to base Part moves upwards, so as to complete the tapping of step threaded hole,When the upper compressing member is moved into place, it that is to say that the upper compressing member completes stable holding with the lower support element to blank Afterwards, blank is downwards completely into lower support element and by after fixation, and the lower pneumatic spring stops deformation, and the tapping bearing also moves The dynamic relative displacement for stopping vertical direction with lower template in place, at this point, the upper pneumatic spring continues to deform, that is, it is described on Template continues displacement, and first nitrogen gas spring also continues to deform, and the driving screw rod is promoted to move downward, the driving screw rod Linear motion drive the rotation of the second drive, and successively via the second intermediate gear, the first level transmission gear, first Horizontal bevel gear, the first vertical bevel gear, the second vertical gear drive the first vertical gear rotation, so as to be converted to institute again The horizontal rotation feed motion that the second tapping screw tap corresponds to 11 position of horizontal threaded bore on blank is stated, so as to complete to horizontal spiral shell The tapping of pit.During the cope plate is run up, the inverse operation of the above process is finally completed hole processing operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711369988.9A CN108098272B (en) | 2017-12-19 | 2017-12-19 | A kind of hole processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711369988.9A CN108098272B (en) | 2017-12-19 | 2017-12-19 | A kind of hole processing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108098272A true CN108098272A (en) | 2018-06-01 |
| CN108098272B CN108098272B (en) | 2019-07-12 |
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ID=62210880
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711369988.9A Active CN108098272B (en) | 2017-12-19 | 2017-12-19 | A kind of hole processing method |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009071437A1 (en) * | 2007-12-07 | 2009-06-11 | Thyssenkrupp Steel Ag | Production method of highly dimensionally accurate half shells |
| KR20100028380A (en) * | 2008-09-04 | 2010-03-12 | 한국단자공업 주식회사 | Tapping apparatus for progressive mold |
| DE102015008049A1 (en) * | 2015-06-19 | 2016-12-22 | Wvl-Werkzeug- Und Vorrichtungsbau Lichtenstein Gmbh | Thread forming device on a punching and forming tool |
| CN106346090A (en) * | 2016-10-28 | 2017-01-25 | 东莞市森川机械工具有限公司 | Split-type intramode tapping machine |
| CN106670603A (en) * | 2017-03-17 | 2017-05-17 | 广东工业大学 | Self-repairing line electrode spark cutting device and method |
| CN107035754A (en) * | 2017-06-05 | 2017-08-11 | 浙江长华汽车零部件有限公司 | High-accuracy high-efficiency nutplate and forming method |
| CN107138615A (en) * | 2017-06-14 | 2017-09-08 | 姚修兵 | A kind of progressive die of composite tooling |
| CN206716849U (en) * | 2017-04-14 | 2017-12-08 | 台光五金制品（东莞）有限公司 | A kind of mould tapping device |
-
2017
- 2017-12-19 CN CN201711369988.9A patent/CN108098272B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009071437A1 (en) * | 2007-12-07 | 2009-06-11 | Thyssenkrupp Steel Ag | Production method of highly dimensionally accurate half shells |
| KR20100028380A (en) * | 2008-09-04 | 2010-03-12 | 한국단자공업 주식회사 | Tapping apparatus for progressive mold |
| DE102015008049A1 (en) * | 2015-06-19 | 2016-12-22 | Wvl-Werkzeug- Und Vorrichtungsbau Lichtenstein Gmbh | Thread forming device on a punching and forming tool |
| CN106346090A (en) * | 2016-10-28 | 2017-01-25 | 东莞市森川机械工具有限公司 | Split-type intramode tapping machine |
| CN106670603A (en) * | 2017-03-17 | 2017-05-17 | 广东工业大学 | Self-repairing line electrode spark cutting device and method |
| CN206716849U (en) * | 2017-04-14 | 2017-12-08 | 台光五金制品（东莞）有限公司 | A kind of mould tapping device |
| CN107035754A (en) * | 2017-06-05 | 2017-08-11 | 浙江长华汽车零部件有限公司 | High-accuracy high-efficiency nutplate and forming method |
| CN107138615A (en) * | 2017-06-14 | 2017-09-08 | 姚修兵 | A kind of progressive die of composite tooling |
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| Publication number | Publication date |
|---|---|
| CN108098272B (en) | 2019-07-12 |
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