CN109175524A - A kind of cutting equipment of end surface of crank shaft - Google Patents
A kind of cutting equipment of end surface of crank shaft Download PDFInfo
- Publication number
- CN109175524A CN109175524A CN201811223901.1A CN201811223901A CN109175524A CN 109175524 A CN109175524 A CN 109175524A CN 201811223901 A CN201811223901 A CN 201811223901A CN 109175524 A CN109175524 A CN 109175524A
- Authority
- CN
- China
- Prior art keywords
- rack
- chip microcontroller
- fixed
- open source
- cutter
- 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
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D79/00—Methods, machines, or devices not covered elsewhere, for working metal by removal of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/09—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool
- B23Q17/0952—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring cutting pressure or for determining cutting-tool condition, e.g. cutting ability, load on tool during machining
- B23Q17/0957—Detection of tool breakage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/24—Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Sawing (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
- Milling Processes (AREA)
Abstract
The invention discloses a kind of cutting equipment of end surface of crank shaft, including rack, one end of the rack is equipped with power mechanism, the side of power mechanism is equipped with fixed device, the other end of the rack is equipped with length adjustment device, the side of length adjustment device is separately installed with positioning device and height adjustment device, this cutting equipment of end surface of crank shaft, it is fixed to machined part by adjustable fixator, its is easy to adjust, it can satisfy and use needs, it is positioned by operating position of the positioning device to cutter, its intelligence degree is high, substantially increase the quality of cutting, the operating position of cutter is adjusted by length adjustment device and height adjustment device, its is adaptable, various sizes of workpiece to be added is processed convenient for cutter, it is monitored by abrasion loss of the detection device to cutter, convenient for right in time Cutter is safeguarded, cutting-tool's used life is substantially increased.
Description
The application is application number 2017107115349, on 08 18th, 2017 applying date, a kind of denomination of invention " crankshaft end
The divisional application of face cutting apparatus ".
Technical field
The present invention relates to machining equipment technical field, specially a kind of cutting equipment of end surface of crank shaft.
Background technique
In the prior art: the patent that application publication number is 101890524 A of CN discloses a kind of cutting of crankshaft end-face and sets
It is standby, by the fixture assembly being arranged on rotating mechanism, the clamping conveying of workpiece is completed, which can clamp multiple works
Workpiece to be processed is clamped in the fixture assembly by part first, the rotation of fixture assembly and clamped workpiece in rotating mechanism
It is circled under effect, when clamped workpiece enters cutter region, cutting tool assembly carries out building up by welding processing to the workpiece
Operation, when crankshaft end-face machining, need the regular hour, and rotating mechanism stops rotating at this time, utilize this section of dead time will
Workpiece to be processed is clamped on another folder station of fixture assembly, to carry out the building up by welding processing of next workpiece, with this
Meanwhile in the other end of rotating mechanism, manufactured crankshaft workpiece is unloaded down from fixture assembly, it can be continuously uninterrupted
Workpieces processing, intelligence degree is low, and it is inconvenient to adjust, and it is impossible to meet use demands.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the existing defects, provides a kind of cutting equipment of end surface of crank shaft, intelligence
Change degree is high, easy to adjust, can satisfy use demand, can effectively solve the problems in background technique.
To achieve the above object, the invention provides the following technical scheme: a kind of cutting equipment of end surface of crank shaft, including rack,
One end of the rack is equipped with power mechanism, and the side of power mechanism is equipped with fixed device, the other end peace of the rack
Equipped with length adjustment device, the side of length adjustment device is separately installed with positioning device and height adjustment device, the height
The side of regulating device is fixed with attachment base, and the end of attachment base is equipped with cutter, and the position peace of cutter is corresponded on attachment base
Equipped with detection device, the side of the rack is equipped with open source single-chip microcontroller, the input terminal of single-chip microcontroller of increasing income and external power supply it is defeated
Outlet connection.
As a preferred technical solution of the present invention, the power mechanism includes crankshaft motor, and crankshaft motor is mounted on
The end of rack is fixed with mounting base on the output shaft of the crankshaft motor, and fixed device is mounted on the side of mounting base, described
The output end of open source single-chip microcontroller and the input terminal of crankshaft motor connect.
As a preferred technical solution of the present invention, the fixed device has four groups, fixed device rotation array setting.
As a preferred technical solution of the present invention, the fixed device includes rotary electric connector and the first guide rail,
First guide rail is mounted on the side of mounting base, and first straight line motor, first straight line motor are connected on first guide rail
Side be fixed with Wedge gripping, the rotary electric connector is mounted on the junction of crankshaft motor and mounting base, the open source
The output end of single-chip microcontroller and the input terminal of rotary electric connector connect, output end and the first straight line motor of rotary electric connector
Input terminal connection.
As a preferred technical solution of the present invention, the length adjustment device includes electric telescopic rod, electric expansion
Bar is mounted on the end of rack, and the telescopic end of the electric telescopic rod is fixed with mounting rack, positioning device and height adjustment device
It is installed in the side of mounting rack, the output end of the open source single-chip microcontroller and the input terminal of electric telescopic rod connect.
As a preferred technical solution of the present invention, the positioning device includes laser scanner and laser measuring apparatus,
Laser scanner and laser measuring apparatus are installed in the side of mounting rack, the output end of the laser scanner and laser measuring apparatus
It is connect with the input terminal of open source single-chip microcontroller.
As a preferred technical solution of the present invention, the height adjustment device includes the second guide rail, the second guide rail peace
Mounted in the side of mounting rack, second straight line motor is connected on second guide rail, attachment base is fixed on second straight line electricity
The output end of the side of machine, the open source single-chip microcontroller is connect with the input terminal of second straight line motor.
As a preferred technical solution of the present invention, the detection device includes supersonic detector and alarm, report
Alert device is mounted on the side of rack, and the supersonic detector is connect by connecting rod with attachment base, supersonic detector it is defeated
Outlet is connect with the input terminal of open source single-chip microcontroller, and the output end of the open source single-chip microcontroller and the input terminal of alarm connect.
Compared with prior art, the beneficial effects of the present invention are: this cutting equipment of end surface of crank shaft, passes through adjustable fixation
Device is fixed to machined part, easy to adjust, can satisfy using needs, by positioning device to the working position of cutter
It sets and is positioned, intelligence degree is high, substantially increases the quality of cutting, passes through length adjustment device and height adjustment device
The operating position of cutter is adjusted, it is adaptable, various sizes of workpiece to be added is processed convenient for cutter, is led to
It crosses detection device to be monitored the abrasion loss of cutter, convenient for safeguarding in time to cutter, substantially increases the use of cutter
Service life.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is side structure schematic diagram of the present invention；
Fig. 3 is structure of the invention sectional view.
In figure: 1 rack, 2 crankshaft motors, 3 mounting bases, 4 laser scanners, 5 laser measuring apparatus, 6 mounting racks, 7 electronic are stretched
Contracting bar, 8 second guide rails, 9 second straight line motors, 10 attachment bases, 11 detection devices, 12 connecting rods, 13 supersonic detectors, 14 knives
Tool, 15 power mechanisms, 16 positioning devices, 17 length adjustment devices, 18 height adjustment device, 19 alarms, 20 open source single-chip microcontrollers,
21 rotary electric connectors, 22 first straight line motors, 23 Wedge grippings, 24 first guide rails, 25 fixed devices.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1-3 is please referred to, the present invention provides a kind of technical solution: a kind of cutting equipment of end surface of crank shaft, including rack 1, machine
One end of frame 1 is equipped with power mechanism 15, and the side of power mechanism 15 is equipped with fixed device 25, the other end installation of rack 1
There is length adjustment device 17, the side of length adjustment device 17 is separately installed with positioning device 16 and height adjustment device 18, high
The side of degree regulating device 18 is fixed with attachment base 10, and the end of attachment base 10 is equipped with cutter 14, and corresponding on attachment base 10
The position of cutter 14 is equipped with detection device 11, and the side of rack 1 is equipped with open source single-chip microcontroller 20, the input for single-chip microcontroller 20 of increasing income
End is connect with the output end of external power supply；
Power mechanism 15 includes crankshaft motor 2, and crankshaft motor 2 is mounted on the end of rack 1, consolidates on the output shaft of crankshaft motor 2
Surely there is a mounting base 3, fixed device 25 is mounted on the side of mounting base 3, and the output end of single-chip microcontroller 20 of increasing income is defeated with crankshaft motor 2
Entering end connection, open source single-chip microcontroller 20 controls crankshaft motor 2 and works, and the output shaft of crankshaft motor 2 drives mounting base 3 to rotate, thus
Workpiece rotation to be added is driven, workpiece to be added contacts to complete cutting process with cutter 14；
Fixed device 25 has four groups, fixed 25 rotation array of device setting, convenient for fixed to machined part；
Fixed device 25 includes rotary electric connector 21 and the first guide rail 24, and the first guide rail 24 is mounted on the side of mounting base 3, the
First straight line motor 22 is connected on one guide rail 24, the side of first straight line motor 22 is fixed with Wedge gripping 23, rotation
Electric connector 21 is mounted on the junction of crankshaft motor 2 Yu mounting base 3, and rotary electric connector 21 is to guarantee the reasonable of design
Property, open source single-chip microcontroller 20 output end connect with the input terminal of rotary electric connector 21, the output end of rotary electric connector 21 and
The input terminal of first straight line motor 22 connects, and controls first straight line motor 22 by open source single-chip microcontroller 20 and does on the first guide rail 24
Linear motion, to drive Wedge gripping 23 to come closer, to be fixed to machined part；
Length adjustment device 17 includes electric telescopic rod 7, and electric telescopic rod 7 is mounted on the end of rack 1, electric telescopic rod 7
Telescopic end is fixed with mounting rack 6, and positioning device 16 and height adjustment device 18 are installed in the side of mounting rack 6, monolithic of increasing income
The output end of machine 20 is connect with the input terminal of electric telescopic rod 7, and open source single-chip microcontroller 20 controls electric telescopic rod 7 according to location information
The telescopic end of work, electric telescopic rod 7 drives mounting rack 6 to stretch, so that the lateral operating position to cutter 14 is adjusted
Section；
Positioning device 16 includes laser scanner 4 and laser measuring apparatus 5, and laser scanner 4 and laser measuring apparatus 5 are installed in peace
Shelve 6 side, the output end of laser scanner 4 and laser measuring apparatus 5 is connect with the input terminal of open source single-chip microcontroller 20, is passed through
Open source single-chip microcontroller 20 controls the shape of laser scanner 4 to machined part and is scanned, and control laser measuring apparatus 5 is to machined part
Size measure, the data for measuring and scanning pass to open source single-chip microcontroller 20, open source single-chip microcontroller 20 information is divided
Analysis processing, to position to the operating position of cutter 14, intelligence degree is high, substantially increases the quality of cutting；
Height adjustment device 18 includes the second guide rail 8, and the second guide rail 8 is mounted on the side of mounting rack 6, activity on the second guide rail 8
Be connected with second straight line motor 9, attachment base 10 is fixed on the side of second straight line motor 9, the output end for single-chip microcontroller 20 of increasing income with
The input terminal of second straight line motor 9 connects, and open source single-chip microcontroller 20 controls second straight line motor 9 in the second guide rail according to location information
Vertical motion is done on 8, so that longitudinal operating position to cutter 14 is adjusted；
Detection device 11 includes supersonic detector 13 and alarm 19, and alarm 19 is mounted on the side of rack 1, and ultrasonic wave is visited
Hurt instrument 13 to connect by connecting rod 12 with attachment base 10, input of the output end of supersonic detector 13 with open source single-chip microcontroller 20
The output end of end connection, open source single-chip microcontroller 20 is connect with the input terminal of alarm 19, and open source single-chip microcontroller 20 controls ultrasonic examination
Instrument 13 is monitored the abrasion loss of cutter 14, and the information of monitoring passes to open source single-chip microcontroller 20, and single-chip microcontroller 20 of increasing income is to information
It is analyzed and processed, when judging that cutter 14 wears excessive, control alarm 19 is alarmed, convenient for carrying out in time to cutter 14
Maintenance, avoids cutter 14 from wearing excess and scrap, substantially increases the service life of cutter 14；
Single-chip microcontroller 20 of increasing income controls crankshaft motor 2, first straight line motor 22, electric telescopic rod 7, laser scanner 4, laser measurement
Instrument 5, second straight line motor 9, supersonic detector 13 and alarm 19 are method commonly used in the prior art.
When in use: first straight line motor 22 is controlled by open source single-chip microcontroller 20 and is moved in a straight line on the first guide rail 24,
To drive Wedge gripping 23 to come closer, to be fixed to machined part, laser is controlled by open source single-chip microcontroller 20 and is swept
The shape of instrument 4 to machined part is retouched to be scanned, control laser measuring apparatus 5 size to machined part measures, measurement and
The data of scanning pass to open source single-chip microcontroller 20, and open source single-chip microcontroller 20 is analyzed and processed information, thus to cutter 14
Operating position is positioned, and open source single-chip microcontroller 20 controls electric telescopic rod 7 according to location information and works, and electric telescopic rod 7 is stretched
Contracting end drives mounting rack 6 to stretch, so that the lateral operating position to cutter 14 is adjusted, open source single-chip microcontroller 20 is according to fixed
Position information control second straight line motor 9 does vertical motion on the second guide rail 8, so that longitudinal operating position to cutter 14 carries out
It adjusts, open source single-chip microcontroller 20 controls crankshaft motor 2 and works, and the output shaft of crankshaft motor 2 drives mounting base 3 to rotate, to drive
Workpiece rotation to be added, workpiece to be added contact to complete cutting process with cutter 14, and open source single-chip microcontroller 20 controls supersonic detector
The abrasion loss of 13 pairs of cutters 14 is monitored, the information of monitoring pass to open source single-chip microcontroller 20, open source single-chip microcontroller 20 to information into
Row analysis processing, when judging that cutter 14 wears excessive, control alarm 19 is alarmed.
The present invention is fixed to machined part by adjustable fixator 25, and easy to adjust, can satisfy makes
It with needs, is positioned by operating position of the positioning device 16 to cutter, intelligence degree is high, substantially increases cutting
Quality is adjusted the operating position of cutter 14 by length adjustment device 17 and height adjustment device 18, adaptability
By force, various sizes of workpiece to be added is processed convenient for cutter 14, is carried out by abrasion loss of the detection device 11 to cutter 14
Monitoring, convenient for safeguarding in time to cutter 14, substantially increases the service life of cutter 14.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (3)
1. a kind of cutting equipment of end surface of crank shaft, including rack (1), it is characterised in that: one end installation of the rack (1) is dynamic
Mechanism (15), the side of power mechanism (15) are equipped with fixed device (25), and the other end of the rack (1) is equipped with length tune
Regulating device (17), the side of length adjustment device (17) are separately installed with positioning device (16) and height adjustment device (18), institute
The side for stating height adjustment device (18) is fixed with attachment base (10), and the end of attachment base (10) is equipped with cutter (14), and even
The position that cutter (14) is corresponded on joint chair (10) is equipped with detection device (11), and it is single that the side of the rack (1) is equipped with open source
Piece machine (20), the input terminal of open source single-chip microcontroller (20) and the output end of external power supply connect, and the fixed device (25) has four groups,
Fixed device (25) rotation array setting, the fixed device (25) include rotary electric connector (21) and the first guide rail (24),
First guide rail (24) is mounted on the side of mounting base (3), is connected with first straight line motor on first guide rail (24)
(22), the side of first straight line motor (22) is fixed with Wedge gripping (23), and the rotary electric connector (21) is mounted on crankshaft
The junction of motor (2) and mounting base (3), the output end of open source single-chip microcontroller (20) and the input of rotary electric connector (21)
End connection, the output end of rotary electric connector (21) are connect with the input terminal of first straight line motor (22), the length adjustment dress
Setting (17) includes electric telescopic rod (7), and electric telescopic rod (7) is mounted on the end of rack (1), the electric telescopic rod (7)
Telescopic end is fixed with mounting rack (6), and positioning device (16) and height adjustment device (18) are installed in the side of mounting rack (6),
The output end of open source single-chip microcontroller (20) is connect with the input terminal of electric telescopic rod (7), and the power mechanism (15) includes song
Spindle motor (2), crankshaft motor (2) are mounted on the end of rack (1), are fixed with installation on the output shaft of the crankshaft motor (2)
Seat (3), fixed device (25) are mounted on the side of mounting base (3), the output end and crankshaft motor of open source single-chip microcontroller (20)
(2) input terminal connection, the positioning device (16) includes laser scanner (4) and laser measuring apparatus (5), laser scanner
(4) and laser measuring apparatus (5) is installed in the sides of mounting rack (6), the laser scanner (4) and laser measuring apparatus (5)
Output end is connect with the input terminal of open source single-chip microcontroller (20).
2. a kind of cutting equipment of end surface of crank shaft according to claim 1, it is characterised in that: the height adjustment device (18)
Including the second guide rail (8), the second guide rail (8) is mounted on the side of mounting rack (6), is connected on second guide rail (8)
Second straight line motor (9), attachment base (10) are fixed on the side of second straight line motor (9), the defeated of single-chip microcontroller (20) of increasing income
Outlet is connect with the input terminal of second straight line motor (9).
3. a kind of cutting equipment of end surface of crank shaft according to claim 1, it is characterised in that: the detection device (11) includes
Supersonic detector (13) and alarm (19), alarm (19) are mounted on the side of rack (1), the supersonic detector
(13) connect with attachment base (10) by connecting rod (12), the output end of supersonic detector (13) with increase income single-chip microcontroller (20)
Input terminal connection, it is described open source single-chip microcontroller (20) output end connect with the input terminal of alarm (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811223901.1A CN109175524A (en) | 2017-08-18 | 2017-08-18 | A kind of cutting equipment of end surface of crank shaft |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710711534.9A CN107350560B (en) | 2017-08-18 | 2017-08-18 | A kind of cutting equipment of end surface of crank shaft |
| CN201811223901.1A CN109175524A (en) | 2017-08-18 | 2017-08-18 | A kind of cutting equipment of end surface of crank shaft |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710711534.9A Division CN107350560B (en) | 2017-08-18 | 2017-08-18 | A kind of cutting equipment of end surface of crank shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109175524A true CN109175524A (en) | 2019-01-11 |
Family
ID=60287465
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710711534.9A Active CN107350560B (en) | 2017-08-18 | 2017-08-18 | A kind of cutting equipment of end surface of crank shaft |
| CN201811223901.1A Withdrawn CN109175524A (en) | 2017-08-18 | 2017-08-18 | A kind of cutting equipment of end surface of crank shaft |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710711534.9A Active CN107350560B (en) | 2017-08-18 | 2017-08-18 | A kind of cutting equipment of end surface of crank shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN107350560B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108380984A (en) * | 2018-05-09 | 2018-08-10 | 浙江柏思达齿轮股份有限公司 | The device and processing method finished to the cone rear flank of bevel gear |
| CN109483268A (en) * | 2018-12-31 | 2019-03-19 | 兴化东华齿轮有限公司 | The quick accurate positioning of drive shaft cutting and cutoff device and Cutting Process |
| CN111790943A (en) * | 2020-06-30 | 2020-10-20 | 湖南金立星机械科技有限公司 | Laser material height measuring device and double-end saw cutting machine |
| CN114850521B (en) * | 2022-05-17 | 2023-03-28 | 重庆荆江汽车半轴股份有限公司 | Rotary cutting device for shaft part for automobile power device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1857860A (en) * | 2006-06-06 | 2006-11-08 | 中国科学院光电技术研究所 | Tool presetting system with photoelectric aiming positioning |
| CN201267916Y (en) * | 2008-10-21 | 2009-07-08 | 深圳市星辰激光技术有限公司 | Automatic pipe material rotating and feeding device for laser cutting machine tool |
| EP2624087B1 (en) * | 2012-02-06 | 2015-09-02 | National Formosa University | Method of numerical-control scraping of a work piece |
| CN204595561U (en) * | 2015-04-20 | 2015-08-26 | 温州职业技术学院 | A kind of mechanical electric automation equipment |
| CN205834828U (en) * | 2016-07-12 | 2016-12-28 | 徐州标特福数控科技有限公司 | A kind of Digit Control Machine Tool clamping device |
-
2017
- 2017-08-18 CN CN201710711534.9A patent/CN107350560B/en active Active
- 2017-08-18 CN CN201811223901.1A patent/CN109175524A/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| CN107350560A (en) | 2017-11-17 |
| CN107350560B (en) | 2018-12-25 |
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Application publication date: 20190111 |