CN108007399A - A kind of axial workpiece Endoporus measuring device - Google Patents

A kind of axial workpiece Endoporus measuring device Download PDF

Info

Publication number
CN108007399A
CN108007399A CN201711150834.0A CN201711150834A CN108007399A CN 108007399 A CN108007399 A CN 108007399A CN 201711150834 A CN201711150834 A CN 201711150834A CN 108007399 A CN108007399 A CN 108007399A
Authority
CN
China
Prior art keywords
gauge head
workpiece
measurement
plug jet
pusher
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.)
Granted
Application number
CN201711150834.0A
Other languages
Chinese (zh)
Other versions
CN108007399B (en
Inventor
石照耀
董定雨
叶勇
张临涛
付瑛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing University of Technology
Original Assignee
Beijing University of Technology
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Beijing University of Technology filed Critical Beijing University of Technology
Priority to CN201711150834.0A priority Critical patent/CN108007399B/en
Publication of CN108007399A publication Critical patent/CN108007399A/en
Application granted granted Critical
Publication of CN108007399B publication Critical patent/CN108007399B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B13/00Measuring arrangements characterised by the use of fluids
    • G01B13/08Measuring arrangements characterised by the use of fluids for measuring diameters
    • G01B13/10Measuring arrangements characterised by the use of fluids for measuring diameters internal diameters

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)

Abstract

The invention discloses a kind of axial workpiece Endoporus measuring device, belong to precision measurement field of measuring techniques;It includes workbench, measurement base, guide rail bottom plate, slide plate, shift fork seat, yoke bar, gauge head component and pushing material component etc., the gauge head component is made of firm banking, I-shaped guide rail, sliding block, plug jet etc., and the pushing material component is made of pusher cylinder, pusher mandril and pusher bearing.The invention device is motionless using plug jet; workpiece enters the method measured on gauge head; by adjusting the spring dynamics between spring-hanging board and positioning baffle; and installation gauge head sensor; effectively reduce the concentricity between plug jet and workpiece; protect plug jet without damage, improve the accuracy repeatedly measured.

Description

A kind of axial workpiece Endoporus measuring device
Technical field
The present invention relates to a kind of Endoporus measuring device, more particularly to a kind of axial workpiece Endoporus measuring device, belongs to accurate Test and measuring technical field.
Background technology
Axial workpiece is one of typical part frequently encountered in machine, it is mainly used to supporting transmission parts, transmits Moment of torsion and load is born, be made of the external cylindrical surface of concentric shafts, circular conical surface, endoporus and screw thread and corresponding end face.Axis class zero Part generally has accurate or ultraprecise processing request, with for ensureing the performance of machine, life and reliability.In its shape In measurement, inside diameter measurement is an important and difficult content all the time, particularly to complex-shaped aperture difficulty bigger.
Air-gauge is matched with plug jet as a kind of fine measuring instrument, can be to more with measuring method is compared The size of kind machine components carries out accurate measurement with geometric tolerance, has high certainty of measurement, self-cleaning function, simple in structure and operation The advantages that easy to maintain, be widely used in the ultra precise measurement of small aperture.
In the prior art, enterprise integrates machinery, electronics, pneumatically usually on the basis of air-gauge using a kind of Measuring device, and it is motionless using workpiece, and plug jet enters the method for inner hole of workpiece measurement under the driving of servomotor.It is this Although method can effectively measure the endoporus size of workpiece, very high, peace is required the concentricity between workpiece and plug jet It is big to fill difficulty, measurement for a long time will cause mechanical structure installation error to increase, and accuracy of measurement reduces.Hole ought particularly be run into When footpath workpiece less than normal or workpiece and coaxially too low plug jet, plug jet cannot be introduced into endoporus, directly bump against On workpiece, it will damage high-accuracy plug jet, cause serious economic loss.
Therefore, it is necessary to provide a kind of axial workpiece Endoporus measuring device to solve the above problems.
The content of the invention
The present invention is intended to provide a kind of axial workpiece Endoporus measuring device, to solve workpiece and plug jet in the prior art Between concentricity require it is high, adjust the problems such as difficulty is big, accuracy of measurement is low and lacks safety precautions.
To reach above-mentioned purpose, technical scheme is as follows:
A kind of axial workpiece Endoporus measuring device, including workbench 1, workbench 1 are used to place measuring part, workbench 1 On be provided with measurement base 2, measure base 2 centered on symmetrical structure;Guide rail bottom plate 3 is installed on measurement base 2, guide rail bottom plate 3 both sides are provided with ball line slideway 4, and slide plate 11 is engaged with ball line slideway 4, and ball line slideway 4 is used to guide Slide plate 11 does linear reciprocating motion by given direction;Yoke bar 29 and shift fork seat 30 are provided with slide plate 11, yoke bar 29 is pacified On shift fork seat 30, yoke bar 29 is used to promote the workpiece on plug jet 15;Endoporus measuring device further includes gauge head component, Gauge head component is used to install plug jet 15.
Gauge head component includes firm banking 25, and firm banking 25 is arranged on workbench 1, to determine that gauge head component is installed on Position on workbench 1;I-shaped guide rail 24 is provided with firm banking 25, I-shaped guide rail 24 is installed above sliding block 23, Sliding block 23 is engaged with I-shaped guide rail 24, and sliding block 23 is connected with fixed backing plate 22 above;Gauge head bottom is provided with fixed backing plate 22 Plate 19, one end of reed 18 are connected to 19 avris of gauge head bottom plate, and the other end of reed 18 is connected on gauge head top plate 17, reed 18 Gauge head top plate 17 is used to support, ensures that plug jet 15 has certain activity space;Gauge head top plate 17 is fixed equipped with gauge head Block 16, plug jet 15 are fitted in gauge head fixed block 16 by transition, and essence is carried out on gauge head for workpiece to be entered Close measurement.
Positioning baffle 28 is also placed among firm banking 25 and measurement base 2, positioning baffle 28 has symmetrical knot Structure, both sides are provided with small through hole, position and pendulum spring 27 for the right of lock slider 23;Two 27 one end of spring are connected to fixed In the aperture of position baffle 28, the other end is then suspended on spring-hanging board 26;The sidepiece of firm banking 25 is provided with a gauge head to pass Sensor 21, after the sensor block 20 on gauge head bottom plate 19 senses the signal of gauge head sensor 21, whole device is stood That is stop motion.
It is provided with servomotor 7 in measurement base 2 one end, servomotor 7 is the dynamical element of whole measuring device, servo Motor 7 is connected with ball line slideway 4, drives the yoke bar 29 on slide plate 11 to move by driving ball line slideway 4; Measurement base 2 is provided at both ends with travel switch 5, and measurement base 2 is used to limit to be measured on the promotion plug jet 15 of yoke bar 29 The moving range of workpiece.
Endoporus measuring device is additionally provided with pushing material component, and pushing material component is by pusher cylinder 9, pusher mandril 12 and pusher bearing 10 Composition, pusher cylinder 9 are installed on pusher bearing 10, and pusher cylinder 9 is connected with pusher mandril 12, and pushing material component is used for turntable Workpiece in 13 is shifted onto on plug jet 15;High-precision digital air-gauge 8, the high-precision number of degrees are provided with pushing material component side Word formula air-gauge 8 is installed on workbench 1, for changing parameter and display measurement data.
Endoporus measuring device further includes charge component, and charge component is made of turntable 13 and retaining sleeve 14, and turntable 13 is installed On retaining sleeve 14, retaining sleeve 14 is installed between plug jet 15 and pusher mandril 12, is used to place workpiece for measurement in turntable 13.
The pulling force of spring 27 is divided into first grade and second gear, and first grade of pulling force is less than the pulling force of second gear;Spring 27 Pulling force is adjusted according to measurement request, if 27 pulling force of spring is first grade, the friction between workpiece for measurement and plug jet 15 Power just can with movable slider 23 with upper-part to a lateral movement, and then drive the sensing of sensor block 20 on gauge head bottom plate 19 to survey Head sensor 21, so as to trigger safety system;If 27 pulling force of spring is second gear, workpiece for measurement and plug jet 15 it Between need that than the frictional force more than first grade of pulling force safety system could be triggered, can thus meet different measurement need Ask.
The present invention can obtain following beneficial effect:
1) motionless by using plug jet in the Endoporus measuring device of the present invention, workpiece for measurement enters in gauge head Measuring method, significantly reduce between plug jet and workpiece for measurement concentricity requirement, improve repeatedly measure it is accurate Degree.
2) in the Endoporus measuring device of the present invention, the gauge head sensor of installation, can effectively prevent plug jet and is wounded, Reduce unnecessary economic loss.
3) in the Endoporus measuring device of the present invention, biography can be adjusted by being connected to the spring between spring-hanging board and positioning baffle Sensor baffle moves to left stress size, and then adjusts the complexity for triggering pneumatic probe protecting device, and operating personnel can be according to survey Amount requires to select oneself suitable dynamics.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment Attached drawing be briefly described.In the accompanying drawings:
Fig. 1 is axial workpiece Endoporus measuring device mechanical structure total figure
In figure:1st, workbench, 2, measurement base, 3, guide rail bottom plate, 4, line slideway, 5, travel switch, 6, motor cabinet, 7, Servomotor, 8, air-gauge, 9, pusher cylinder, 10, pusher bearing, 11, slide plate, 12, pusher mandril, 13, turntable, 14, folder Hold set, 15, plug jet, 16, gauge head fixed block, 17, gauge head top plate, 18, reed, 19, gauge head bottom plate, 20, sensor block, 21st, gauge head sensor, 22, fixed backing plate, 23, sliding block, 24, I-shaped guide rail, 25, firm banking, 26, spring-hanging board, 27, bullet Spring, 28, positioning baffle, 29, yoke bar, 30, shift fork seat
Embodiment
The present invention is further illustrated with reference to the accompanying drawings and detailed description.
As shown in Figure 1, the axial workpiece Endoporus measuring device of the present embodiment includes workbench 1, for placing measuring part, Measurement base 2 is set on workbench 1, and measurement base 2 has centrosymmetric structure, is fixed on by one group of screw on workbench 1; Guide rail bottom plate 3 is installed on measurement base 2, and both sides are provided with ball line slideway 4, for guiding plate 11 by given side To doing linear reciprocating motion;Slide plate 11 is connected with shift fork seat 30 above, and yoke bar 29 is fixed on shift fork seat 30 by one group of screw, 29 front end of yoke bar is provided with a semicircle perforate more slightly larger than 15 diameter of plug jet, for by the work on plug jet 15 Part is pulled back in retaining sleeve 14;Endoporus measuring device further includes gauge head component, core component of the gauge head component as whole device, For installing plug jet 15.
Gauge head component includes firm banking 25, and firm banking 25 is arranged on workbench 1, it may be determined that gauge head component is installed Position on workbench 1;I-shaped guide rail 24 is provided with firm banking 25, I-shaped guide rail 24 is provided with sliding block above 23, sliding block 23 is connected with the I-shaped precision of guide rail 24;Sliding block 23 is connected with fixed backing plate 22 above, is fixed by one group of screw, protects Card is connected as a single entity with sliding block 23;Gauge head bottom plate 19 is provided with fixed backing plate 22,18 one end of reed is connected to 19 side of gauge head bottom plate Side, the other end are connected on gauge head top plate 17, are used to support gauge head top plate 17, ensure that plug jet 15 has certain activity sky Between, enable that workpiece is steady, smoothly enters and is measured on plug jet 15;15 transition of plug jet is fitted to gauge head and fixes In block 16, entered for workpiece and accurate measurement is carried out on gauge head.
Positioning baffle 28 is also placed among firm banking 25 and measurement base 2, positioning baffle 28 has symmetrical knot Structure, both sides are provided with small through hole, position and pendulum spring 27 for the right of lock slider 23;Two 27 one end of spring are connected to fixed In the aperture of position baffle 28, the other end is then suspended on spring-hanging board 26, and the effect of spring 27 is to ensure workpiece and plug jet 15 Between the component that has certain frictional force and can just drive whole sliding block more than 23 move, while sliding block 23 can also be made to be returned with upper-part To initial position;In addition, a gauge head sensor 21 is provided with the left side of firm banking 25, when on gauge head bottom plate 19 Sensor block 20 has sensed gauge head sensor 21, whole device stop motion immediately;Wherein, the dynamics of spring 27, operator Member can be adjusted according to the measurement request of oneself, less between workpiece and plug jet 15 to rub if 27 pulling force of spring is smaller Wiping power can be moved to the left with movable slider 23 with upper-part, and then drive the sensor block 20 on gauge head bottom plate 19 to sense Gauge head sensor 21, so as to trigger safety system;If 27 pulling force of spring is larger, needed between workpiece and plug jet 15 Very big frictional force could trigger safety system, can thus meet the different measurement demand of operating personnel.
Measurement 2 right end of base is provided with servomotor 7, servomotor 7 is fixed on measurement base 2 by motor cabinet 6, Dynamical element as whole measuring device, drives the yoke bar 29 on slide plate 11 to be moved;Also set at 2 both ends of measurement base Travel switch 5 is equipped with, the moving range of workpiece on plug jet 15 is promoted for limiting yoke bar 29.
Fig. 1 shows that the Endoporus measuring device in embodiment also has pushing material component, and pushing material component is by pusher cylinder 9, pusher mandril 12 and pusher bearing 10 form, for shifting the workpiece in turntable 13 onto plug jet 15;Wherein, pusher mandril 12 is by interior It is threaded in pusher cylinder 9, pusher cylinder 9 is fixed on pusher bearing 10, and the installation of pusher mandril 12 need to keep and press from both sides The workpiece held in set 14 is coaxial, and workpiece could so be pushed away to retaining sleeve 14.
The present embodiment Endoporus measuring device further includes charge component (partly drawing), by the group such as turntable 13 and retaining sleeve 14 Into for placing workpiece;Retaining sleeve 14 is fixed on above turntable 13, between plug jet 15 and pusher mandril 12, and Guarantee is coaxial with them, enables pusher mandril 12 that smoothly workpiece is pushed on plug jet 15.
The method of the present embodiment measurement is fixed for plug jet 15, and workpiece enters on plug jet 15 side measured Method;When mechanical erection is carried out, because gauge head component part is more, volume is also larger, the bad adjustment of installation accuracy, therefore first really Determine the position of plug jet 15, then the position of workpiece is determined by plug jet 15, the position for adjusting workpiece at this time is come relatively Say it is simpler, as long as the component of sliding block more than 23 is verified during debugging repeatedly not toward left side movement, thus effectively Ground reduces the concentricity requirement between plug jet 15 and workpiece, substantially reduces the difficulty of mechanical erection, also improves more The accuracy of secondary measurement;In addition, high-precision digital air-gauge 8 is provided with beside pushing material component, installed in workbench 1 On, for changing parameter and display measurement data.
The foregoing is merely the embodiment of the present invention, is not intended to limit the invention, for those skilled in the art For member, the invention may be variously modified and varied.Any modification within the spirit and principles of the invention, being made, Equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.

Claims (2)

  1. A kind of 1. axial workpiece Endoporus measuring device, it is characterised in that:Including workbench (1), workbench (1), which is used to place, to be measured Component, is provided with measurement base (2) on workbench (1), symmetrical structure centered on measurement base (2);Guide rail bottom plate (3) is installed on Measure on base (2), the both sides of guide rail bottom plate (3) are provided with ball line slideway (4), slide plate (11) and ball line slideway (4) it is engaged, ball line slideway (4) does linear reciprocating motion for guiding plate (11) by given direction;Slide plate (11) On be provided with yoke bar (29) and shift fork seat (30), yoke bar (29) is installed on shift fork seat (30), and yoke bar (29) is used to push away Workpiece on dynamic plug jet (15);Endoporus measuring device further includes gauge head component, and gauge head component is used to install plug jet (15);
    Gauge head component includes firm banking (25), and firm banking (25) is arranged on workbench (1), to determine that gauge head component is installed Position on workbench (1);I-shaped guide rail (24) is provided with firm banking (25), I-shaped guide rail (24) is installed above There is sliding block (23), sliding block (23) is engaged with I-shaped guide rail (24), and sliding block (23) is connected with fixed backing plate (22) above;Fixed pad Be provided with gauge head bottom plate (19) on plate (22), one end of reed (18) is connected to gauge head bottom plate (19) avris, reed (18) it is another One end is connected on gauge head top plate (17), and reed (18) is used to support gauge head top plate (17), ensures that plug jet (15) has one Fixed activity space;Gauge head top plate (17) is equipped with gauge head fixed block (16), and plug jet (15) is fitted to by transition In gauge head fixed block (16), accurate measurement is carried out on gauge head for workpiece to be entered;
    Positioning baffle (28) is also placed among firm banking (25) and measurement base (2), positioning baffle (28) has symmetrical Structure, both sides are provided with small through hole, for the position on the right of lock slider (23) and pendulum spring (27);Two springs (27) one End is connected in the aperture of positioning baffle (28), and the other end is then suspended on spring plank (26);Set in the sidepiece of firm banking (25) A gauge head sensor (21) is equipped with, when the sensor block (20) on gauge head bottom plate (19) senses gauge head sensor (21) after signal, whole device stop motion immediately;
    Measurement base (2) one end is provided with servomotor (7), servomotor (7) is the dynamical element of whole measuring device, is watched Take motor (7) to be connected with ball line slideway (4), dialling on slide plate (11) is driven by driving ball line slideway (4) Fork arm (29) moves;Measurement base (2) is provided at both ends with travel switch (5), and measurement base (2) is used to limit yoke bar (29) Promote the moving range of workpiece for measurement on plug jet (15);
    Endoporus measuring device is additionally provided with pushing material component, and pushing material component is by pusher cylinder (9), pusher mandril (12) and pusher bearing (10) form, pusher cylinder (9) is installed on pusher bearing (10), and pusher cylinder (9) is connected with pusher mandril (12), pusher group Part is used to shift the workpiece in turntable (13) onto plug jet (15);Pushing material component side is provided with high-precision digital gas Momentum instrument (8), high-precision digital air-gauge (8) are installed on workbench (1), for changing parameter and display measurement number According to;
    Endoporus measuring device further includes charge component, and charge component is made of turntable (13) and retaining sleeve (14), turntable (13) peace On clamping set (14), retaining sleeve (14) is installed between plug jet (15) and pusher mandril (12), and turntable is used in (13) Place workpiece for measurement.
  2. A kind of 2. axial workpiece Endoporus measuring device according to claim 1, it is characterised in that:The pulling force of spring (27) point For first grade and second gear, first grade of pulling force is less than the pulling force of second gear;The pulling force of spring (27) is adjusted according to measurement request Section, if spring (27) pulling force is first grade, the frictional force between workpiece for measurement and plug jet (15) just can be with movable slider (23) with upper-part to a lateral movement, and then sensor block (20) induction feeler sensor on gauge head bottom plate (19) is driven (21), so as to trigger safety system;Spring if (27) pulling force is second gear, between workpiece for measurement and plug jet (15) Need that than the frictional force more than first grade of pulling force safety system could be triggered, can thus meet different measurement demands.
CN201711150834.0A 2017-11-18 2017-11-18 A kind of axial workpiece Endoporus measuring device Active CN108007399B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711150834.0A CN108007399B (en) 2017-11-18 2017-11-18 A kind of axial workpiece Endoporus measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711150834.0A CN108007399B (en) 2017-11-18 2017-11-18 A kind of axial workpiece Endoporus measuring device

Publications (2)

Publication Number Publication Date
CN108007399A true CN108007399A (en) 2018-05-08
CN108007399B CN108007399B (en) 2019-07-26

Family

ID=62053045

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711150834.0A Active CN108007399B (en) 2017-11-18 2017-11-18 A kind of axial workpiece Endoporus measuring device

Country Status (1)

Country Link
CN (1) CN108007399B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2519235Y (en) * 2002-01-10 2002-10-30 无锡纽思达科技有限公司 Bearing internal diameter automatic measuring apparatus
CN1755324A (en) * 2004-09-30 2006-04-05 洛阳轴承集团有限公司 Pneumatic instrument for measuring inside diameter of thin-wall bearing
KR101541652B1 (en) * 2014-09-02 2015-08-03 김진용 Apparatus and method for inspecting valve seat and valve guide of cylinder head
CN105783797A (en) * 2016-04-16 2016-07-20 汪丽莉 Aperture full-automatic detection device
CN107121105A (en) * 2017-04-27 2017-09-01 嘉兴晟友机械科技有限公司 A kind of detection means of repacking measurement equipment axis length and hole size

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2519235Y (en) * 2002-01-10 2002-10-30 无锡纽思达科技有限公司 Bearing internal diameter automatic measuring apparatus
CN1755324A (en) * 2004-09-30 2006-04-05 洛阳轴承集团有限公司 Pneumatic instrument for measuring inside diameter of thin-wall bearing
KR101541652B1 (en) * 2014-09-02 2015-08-03 김진용 Apparatus and method for inspecting valve seat and valve guide of cylinder head
CN105783797A (en) * 2016-04-16 2016-07-20 汪丽莉 Aperture full-automatic detection device
CN107121105A (en) * 2017-04-27 2017-09-01 嘉兴晟友机械科技有限公司 A kind of detection means of repacking measurement equipment axis length and hole size

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
叶宗茂: "气动测量技术", 《液压气动密封》 *
杨俊 等: "气动量仪在数控珩磨机床中的应用", 《自动化技术与应用》 *

Also Published As

Publication number Publication date
CN108007399B (en) 2019-07-26

Similar Documents

Publication Publication Date Title
US7434331B2 (en) Dimension measuring instrument and height gauge
CN106225680B (en) A kind of spool displacement measuring device and method based on laser displacement sensor
CN203100609U (en) Integrated detection fixture for rack nut of recirculating ball-type steering gear
CN103322961B (en) For being just machined the detector of workpiece
CN101319864A (en) Plug gauge head pore diameter measurement mechanism
CN103868441A (en) Test tool for detecting planeness of workpiece
CN110823066B (en) Inner cavity diameter detection device and method
CN101852580B (en) Workpiece length correcting device
US3781997A (en) Diameter gauge for machine tools
CN108007399B (en) A kind of axial workpiece Endoporus measuring device
JP2018072175A (en) Outer diameter measurement device, and measurement method
CN102759322A (en) Testing device for checking verticality of workpieces
CN209356335U (en) A kind of anti-secondary pulse falling ball impact test machine of high-precision
US5873173A (en) Device for measuring length and vertical clearance of engine connecting rods
CN105823400A (en) Dedicated measuring tool for two-hole verticality detection of medium and small parts and measuring method thereof
CN203272340U (en) High-precision inspection device for air-suspending friction-free air cylinder
CN206056476U (en) A kind of OCTG inner thread conicity measuring instrument
CN214407400U (en) Detection device for lead screw nut
CN108195249A (en) Hole location detecting tool
CN103245607A (en) Device for measuring frictional force accurately
CN103105110A (en) Method and device for jumbo size high-accuracy measurement based on standard ruler
CN208155548U (en) Waveform spring ancillary test tooling
CN202083329U (en) Internal taper measuring instrument
CN103234899B (en) A detection device for a high-precision air-levitated friction-free cylinder
CN108917559B (en) Simple and easy macroporous chamfer measuring tool

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant