CN206952561U - A kind of fixture for preventing the turning of thin-walled ring parts from deforming - Google Patents

A kind of fixture for preventing the turning of thin-walled ring parts from deforming Download PDF

Info

Publication number
CN206952561U
CN206952561U CN201720574527.4U CN201720574527U CN206952561U CN 206952561 U CN206952561 U CN 206952561U CN 201720574527 U CN201720574527 U CN 201720574527U CN 206952561 U CN206952561 U CN 206952561U
Authority
CN
China
Prior art keywords
turning
positioning
pressuring plate
positive stop
lug boss
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.)
Active
Application number
CN201720574527.4U
Other languages
Chinese (zh)
Inventor
文小山
杨德存
罗川友
刘静
方伦彬
王永军
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.)
DEC Dongfang Turbine Co Ltd
Original Assignee
DEC Dongfang Turbine Co Ltd
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 DEC Dongfang Turbine Co Ltd filed Critical DEC Dongfang Turbine Co Ltd
Priority to CN201720574527.4U priority Critical patent/CN206952561U/en
Application granted granted Critical
Publication of CN206952561U publication Critical patent/CN206952561U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model discloses a kind of fixture, particularly a kind of fixture for preventing the turning of thin-walled ring parts from deforming, belong to machinery processing apparatus technical field;The device includes the chuck that cracks for inner hole of workpiece turning to be added, positioning disk and positioning pressuring plate for workpiece cylindrical turning to be added processing, workpiece to be added is sleeved in the chuck that cracks and fixed by chuck, the first positive stop lug boss and the second positive stop lug boss are respectively arranged with the positioning disk and positioning pressuring plate, positioning disk is fixed by chuck, positioning pressuring plate axially engages fixation by top, and workpiece to be added is enclosed on outside positioning disk and positioning pressuring plate and by the first positive stop lug boss and the second spacing fixation of positive stop lug boss clamping;Clamping force is difficult to control when the utility model solves thin-walled ring parts turning clamping, the problem of machining deformation is larger, effectively prevent bend pipe from supporting annular strain, boss thickness precision is high, meet the design requirement of bend pipe support ring, and simple in construction, convenient mounting and clamping, easily make, manufacturing cost is low.

Description

A kind of fixture for preventing the turning of thin-walled ring parts from deforming
Technical field
A kind of fixture is the utility model is related to, particularly a kind of fixture for preventing the turning of thin-walled ring parts from deforming, is belonged to Machinery processing apparatus technical field.
Background technology
Bend pipe supporting ring material be Hastelloy class, be ring class thin-walled parts, half parting face l-shaped, with cutting force greatly, Cutting temperature is high, easily glues the characteristics such as knife, high tenacity and poor thermal conductivity, and bend pipe support ring easily becomes in the presence of clamping force Shape, currently used ring class clamp for thin-walled part mainly have universal fixturing clamping and special soft pawl clamping and special mandrel clamping. Special soft pawl clamping bend pipe support ring, can clamp that cylindrical length is short, and clamping force is difficult to control, and machining deformation is larger.Special mandrel Clamping bend pipe support ring, using nut check, axle diameter is big, weight weight, installing/dismounting inconvenience.Universal lathe chuck directly fills Folder, turning bend pipe support ring, machining deformation are big by way of adjusting Roughing and fine machining clamping force, it is impossible to meet bend pipe support ring Design requirement.
The content of the invention
Goal of the invention of the present utility model is:For above-mentioned problem, there is provided a kind of simple in construction, clamping side Just, easily make, the fixture for preventing the turning of thin-walled ring parts from deforming that manufacturing cost is low.
The technical solution adopted in the utility model is as follows:.
A kind of fixture for preventing the turning of thin-walled ring parts from deforming, including the folder that cracks for inner hole of workpiece turning to be added Set, positioning disk and positioning pressuring plate for workpiece cylindrical turning to be added processing, the chuck that cracks is revolving body cover parts, footpath To there is an open seam, workpiece to be added is sleeved in the chuck that cracks and fixed by chuck, divides on the positioning disk and positioning pressuring plate The first positive stop lug boss and the second positive stop lug boss are not provided with, and positioning disk is fixed by chuck, and positioning pressuring plate is axially engaged admittedly by top Fixed, workpiece to be added is enclosed on outside positioning disk and positioning pressuring plate and by the first positive stop lug boss and the second spacing fixation of positive stop lug boss clamping.
A kind of fixture for preventing the turning of thin-walled ring parts from deforming of the present utility model, using cracking, chuck passes through lathe card Disk fixes workpiece bend pipe support ring class thin-walled ring parts to be added, so as to carry out the car of inner hole of workpiece to be added and associated end face Cut processing.After being completely processed, the chuck that cracks is removed, positioning disk is arranged on chuck, puts workpiece to be added, then positioning is installed Pressing plate, positioning pressuring plate is moved axially using top, and compressed and clamping workpiece to be added.Which changes the application point of power, The problem of effectively avoiding workpiece bend pipe support ring class thin-walled ring parts to be added from deforming in process, it is simple in construction, into This is low.
A kind of fixture for preventing the turning of thin-walled ring parts from deforming of the present utility model, first positive stop lug boss are annular Boss, positioning disk is clamped for chuck where side, and opposite side is sleeved in workpiece inner wall to be added.Which makes workpiece to be added Axially and radially it is obtained for support.
Further, second positive stop lug boss and positioning pressuring plate are integrated and are made, and the second positive stop lug boss is L-shaped, directly The positioning pressuring plate at the smaller place in footpath is sleeved in workpiece inner wall to be added.It is more equal which is advantageous to workpiece end face stress to be added It is even.
Further, first positive stop lug boss is integrated with positioning disk is made.Service life is grown, and is not likely to produce deformation, Be advantageous to clamping effect, improve turning accuracy.
A kind of fixture for preventing the turning of thin-walled ring parts from deforming of the present utility model, on the positioning disk and positioning pressuring plate It is evenly arranged with multiple through holes for being used to mitigate quality.Which reduces the bearing capacity of lathe, is advantageous to slow-roll stabilization.
Further, the positioning pressuring plate and the end face of top cooperation are provided with center taper hole, close to positioning pressuring plate end face Place center taper hole is provided with taper, the center taper hole and top cooperation.Using center taper hole and top cooperation, fiting effect is more Add.
Further, the taper is 60 °.It is bonded best results.
Further, the axis of the center taper hole is vertical with the end face of positioning pressuring plate, and with the axis weight of positioning pressuring plate Close.Accurate positioning, rotating effect is more.
Further, the spacing end face of first positive stop lug boss and the second positive stop lug boss and positioning disk and positioning pressuring plate Axis is vertical.Ensure clamping effect, improve turning accuracy.
In summary, by adopting the above-described technical solution, the beneficial effects of the utility model are:Of the present utility model one Kind prevents that clamping force is difficult to control when the fixture that the turning of thin-walled ring parts deforms from solving thin-walled ring parts turning clamping, is added The problem of work deformation is larger, when carrying out clamping, after cracking that chuck clamping bend pipe support ring small end is cylindrical and staying regulation surplus Outer round surface, then chuck outer surface of cracking is clamped with lathe chuck, endoporus and datum end face and overall length are finished, then uses lathe Chuck clamping positioning disk clamping benchmark is cylindrical, corrects positioning disk, installs bend pipe support ring, by tailstock tool, top and positioning Pressing plate pressure compresses bend pipe support ring, and small end is cylindrical and boss is cylindrical and boss thickness for finishing, effectively prevents bend pipe support ring Deformation, boss thickness precision is high, meets the design requirement of bend pipe support ring, and simple in construction, convenient mounting and clamping, easily system Make, manufacturing cost is low.
Brief description of the drawings
Fig. 1 is one of the utility model structure diagram;
Fig. 2 is the two of the utility model structure diagram;
Fig. 3 is the utility model bend pipe supporting ring structure schematic diagram;
Fig. 4 is that the utility model cracks jacket structured schematic diagram;
Fig. 5 is the utility model positioning disk structural representation;
Fig. 6 is the utility model positioning pressuring plate structural representation.
Marked in figure:1- cracks chuck, 2- positioning disks, 3- positioning pressuring plates, the positive stop lug boss of 4- first, the limit convexes of 5- second Platform, 6- centers taper hole, 7- circular thin-wall class parts.
Embodiment
Below in conjunction with the accompanying drawings, the utility model is described in detail.
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining The utility model, it is not used to limit the utility model.
Embodiment
A kind of fixture for preventing the turning of thin-walled ring parts from deforming, as shown in Figures 1 and 2, including in workpiece to be added The chuck 1 that cracks of hole turning, positioning disk 2 and positioning pressuring plate 3 for workpiece cylindrical turning to be added processing, the chuck 1 that cracks are back Cover parts are turned, radially there is an open seam, workpiece to be added is sleeved in the chuck that cracks and fixed by chuck, the He of positioning disk 2 The first positive stop lug boss 4 and the second positive stop lug boss 5 are respectively arranged with positioning pressuring plate 3, positioning disk 2 is fixed by chuck, positioning pressuring plate 3 Fixation is axially engaged by top, workpiece to be added is enclosed on outside positioning disk 2 and positioning pressuring plate 3 and by the first positive stop lug boss 4 and the second limit The position spacing fixation of the clamping of boss 5.
In the present embodiment, as shown in figure 3, thin-walled ring parts 7 are L-shaped, it is as shown in Fig. 1 and Fig. 4, workpiece to be added is curved Pipe support ring(That is thin-walled ring parts 7)Cracking in chuck 1 with radial opening seam is sleeved on, is clamped using the chuck of lathe Crack chuck 1 and workpiece to be added and fixation, control clamping force, then endoporus to machined part and outer face is entered according to length Row turnery processing.After machining, positioning disk 2 is fixed on chuck, assembles workpiece and positioning pressuring plate 3 to be added, is utilized It is top to move axially positioning pressuring plate 3, so as to compress workpiece to be added, clamping is realized, then carry out cylindrical, boss and boss thickness Turnery processing.In the embodiment, as shown in Fig. 2 the both ends of the surface of workpiece to be added and positioning disk 2 and the boss of positioning pressuring plate 3 Face is bonded, and using the end face of the first positive stop lug boss 4 as locating surface, chuck clamps the cylindrical of positioning disk 2, and this is cylindrical with card The origin reference location of disk clamping.The installation way effectively solves thin-walled ring parts 7(Bend pipe support ring)In turnery processing The problem of clamping deforms.
As more specifical, the outer wall of positioning disk 2 and positioning briquetting 3 in workpiece to be added with workpiece to be added Wall coordinates for gap.The size in the gap is depending on the processing progress of reality and the size of workpiece to be added.
On the basis of stating embodiment in realization, in another embodiment, as shown in figure 5, the first limit Position boss 2 is annular boss, and positioning disk 2 clamps for chuck where side, and opposite side is sleeved in workpiece inner wall to be added.Should Mode both ensure that chuck clamping length in turn ensure that the length of clamping thin-walled ring parts 7.
As what is further optimized, in a wherein embodiment, as shown in fig. 6, the second positive stop lug boss 5 and positioning Pressing plate 3, which is integrated, to be made, and the second positive stop lug boss 5 is L-shaped, and the positioning pressuring plate at the smaller place of diameter is sleeved in workpiece to be added In wall.Which ensure that stressed effect also ensure that the service life of positioning pressuring plate.More specifically, the first positive stop lug boss 4 It is integrated and is made with positioning disk 2.
The load for adding motor is made according to solid material for positioning disk 2 and positioning pressuring plate 3, in order to improve this Situation, in another embodiment, it is evenly arranged with positioning disk 2 and positioning pressuring plate 3 multiple for mitigating the logical of quality Hole.It is to ensure the effect rotated, avoid the occurrence of the situation of eccentric rotary, influence thin-walled ring parts 7 using being uniformly distributed The precision of turnery processing.
And in positioning pressuring plate 7 and top engagement process, in a wherein embodiment, positioning pressuring plate 3 and top The end face that point coordinates is provided with center taper hole 6, center taper hole where positioning pressuring plate end face is provided with taper, the center taper hole 6 with top cooperation.The fit system is the fit system of standard.As further optimization design, taper is 60 °.Certainly not Exclude that such as 30 °, 45 ° or 75 ° can be used, even if what is coordinated is ineffective, influence accessory service life.
In process, the matching relationship between correlation surface and line is with strict requirements, in the present embodiment, is Further specific optimization, the axis of center taper hole 6 is vertical with the end face of positioning pressuring plate 3, and with the axis weight of positioning pressuring plate 3 Close.Which ensure that fixture along chuck and rotation of the top line as axis.
More specifically, the spacing end face of the first positive stop lug boss 4 and the second positive stop lug boss 5 and positioning disk 2 and positioning pressuring plate 3 Axis it is vertical.The stability rotated is fully ensured that, the precision for avoiding rotational band from influences.
In summary, a kind of fixture for preventing that the turning of thin-walled ring parts from deforming of the present utility model solves thin-walled ring class The problem of clamping force is difficult to control during accessory turning clamping, and machining deformation is larger, when carrying out clamping, with cracking, chuck clamping is curved The cylindrical outer round surface stayed after regulation surplus of piping support ring small end, then clamp chuck outer surface of cracking, finishing with lathe chuck Endoporus and datum end face and overall length, it is then cylindrical with lathe chuck clamping position disk clamping benchmark, positioning disk is corrected, bend pipe is installed Support ring, by tailstock tool, top and positioning pressuring plate pressure compresses bend pipe support ring, and finishing small end is cylindrical and boss is cylindrical And boss thickness, effectively prevent bend pipe from supporting annular strain, boss thickness precision is high, meets that the design of bend pipe support ring will Ask, and simple in construction, convenient mounting and clamping, easily make, manufacturing cost is low.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model Protection domain within.

Claims (9)

  1. A kind of 1. fixture for preventing the turning of thin-walled ring parts from deforming, it is characterised in that:Including for inner hole of workpiece turning to be added The chuck that cracks(1), for workpiece cylindrical turning to be added processing positioning disk(2)And positioning pressuring plate(3), the chuck that cracks (1)For revolving body cover parts, radially there is an open seam, workpiece to be added is sleeved in the chuck that cracks and fixed by chuck, institute State positioning disk(2)And positioning pressuring plate(3)On be respectively arranged with the first positive stop lug boss(4)With the second positive stop lug boss(5), positioning disk (2)Fixed by chuck, positioning pressuring plate(3)Fixation is axially engaged by top, workpiece to be added is enclosed on positioning disk(2)And positioning pressuring plate (3)Outside and by the first positive stop lug boss(4)With the second positive stop lug boss(5)The spacing fixation of clamping.
  2. A kind of 2. fixture for preventing the turning of thin-walled ring parts from deforming as claimed in claim 1, it is characterised in that:Described first Positive stop lug boss(4)For annular boss, positioning disk where side(2)Clamped for chuck, opposite side is sleeved in workpiece to be added In wall.
  3. A kind of 3. fixture for preventing the turning of thin-walled ring parts from deforming as claimed in claim 1, it is characterised in that:Described second Positive stop lug boss(5)And positioning pressuring plate(3)It is integrated and is made, the second positive stop lug boss(5)It is L-shaped, the positioning at the smaller place of diameter Pressing plate is sleeved in workpiece inner wall to be added.
  4. A kind of 4. fixture for preventing the turning of thin-walled ring parts from deforming as claimed in claim 1, it is characterised in that:Described first Positive stop lug boss(4)With positioning disk(2)It is integrated and is made.
  5. A kind of 5. fixture for preventing the turning of thin-walled ring parts from deforming as claimed in claim 1, it is characterised in that:The positioning Disk(2)And positioning pressuring plate(3)On be evenly arranged with and multiple be used to mitigate the through holes of quality.
  6. A kind of 6. fixture for preventing the turning of thin-walled ring parts from deforming as claimed in claim 1, it is characterised in that:The positioning Pressing plate(3)The end face of top cooperation is provided with center taper hole(6), center taper hole where positioning pressuring plate end face is provided with cone Degree, the center taper hole(6)With top cooperation.
  7. A kind of 7. fixture for preventing the turning of thin-walled ring parts from deforming as claimed in claim 6, it is characterised in that:The taper For 60 °.
  8. A kind of 8. fixture for preventing the turning of thin-walled ring parts from deforming as claimed in claim 6, it is characterised in that:The center Taper hole(6)Axis and positioning pressuring plate(3)End face it is vertical, and and positioning pressuring plate(3)Axis overlap.
  9. A kind of 9. fixture for preventing the turning of thin-walled ring parts from deforming as claimed in claim 1, it is characterised in that:Described first Positive stop lug boss(4)With the second positive stop lug boss(5)Spacing end face and positioning disk(2)And positioning pressuring plate(3)Axis it is vertical.
CN201720574527.4U 2017-05-23 2017-05-23 A kind of fixture for preventing the turning of thin-walled ring parts from deforming Active CN206952561U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720574527.4U CN206952561U (en) 2017-05-23 2017-05-23 A kind of fixture for preventing the turning of thin-walled ring parts from deforming

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720574527.4U CN206952561U (en) 2017-05-23 2017-05-23 A kind of fixture for preventing the turning of thin-walled ring parts from deforming

Publications (1)

Publication Number Publication Date
CN206952561U true CN206952561U (en) 2018-02-02

Family

ID=61375243

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201720574527.4U Active CN206952561U (en) 2017-05-23 2017-05-23 A kind of fixture for preventing the turning of thin-walled ring parts from deforming

Country Status (1)

Country Link
CN (1) CN206952561U (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108436551A (en) * 2018-04-18 2018-08-24 哈尔滨建成集团有限公司 A kind of thin-walled end cap fixture
CN109015444A (en) * 2018-10-18 2018-12-18 河南格锐新材料科技有限公司 A kind of grinding wheel firing platen of pressing device
CN110370034A (en) * 2019-07-12 2019-10-25 中国电子科技集团公司第三十八研究所 A kind of fixture of the slim annular workpieces of turning
CN111015112A (en) * 2019-12-23 2020-04-17 贵州凯星液力传动机械有限公司 Machining method for thin-wall circular ring part
CN111299615A (en) * 2020-03-20 2020-06-19 中国航发哈尔滨东安发动机有限公司 Machining method for aviation thin-wall part based on machine-clamp integrated clamping
CN112247607A (en) * 2020-10-14 2021-01-22 常州工程职业技术学院 Thin-wall part turning clamp
CN112517946A (en) * 2020-12-01 2021-03-19 南京高精轨道交通设备有限公司 Clamp and lathe
CN112719792A (en) * 2020-12-15 2021-04-30 山西江淮重工有限责任公司 Processing method of opening thin-wall wedge ring and positioning and clamping device
CN113103026A (en) * 2021-03-09 2021-07-13 武汉镁里镁科技有限公司 Annular part machining clamp and annular part machining method
CN113245567A (en) * 2021-06-03 2021-08-13 哈尔滨汽轮机厂有限责任公司 Thin-wall end cover turning anti-deformation auxiliary tool and turning method
CN113953864A (en) * 2021-11-15 2022-01-21 福洛德(上海)传动技术有限公司 Tool for machining thin-wall conical surface of ring disc part
CN114260736A (en) * 2021-10-29 2022-04-01 中国航发西安动力控制科技有限公司 Opening sleeve for thin-wall step cover plate and thin-wall step cover plate machining method
CN114799231A (en) * 2022-06-16 2022-07-29 山西平阳重工机械有限责任公司 Turning method of thin-wall shell

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108436551A (en) * 2018-04-18 2018-08-24 哈尔滨建成集团有限公司 A kind of thin-walled end cap fixture
CN109015444A (en) * 2018-10-18 2018-12-18 河南格锐新材料科技有限公司 A kind of grinding wheel firing platen of pressing device
CN110370034A (en) * 2019-07-12 2019-10-25 中国电子科技集团公司第三十八研究所 A kind of fixture of the slim annular workpieces of turning
CN111015112A (en) * 2019-12-23 2020-04-17 贵州凯星液力传动机械有限公司 Machining method for thin-wall circular ring part
CN111299615B (en) * 2020-03-20 2021-09-10 中国航发哈尔滨东安发动机有限公司 Machining method for aviation thin-wall part based on machine-clamp integrated clamping
CN111299615A (en) * 2020-03-20 2020-06-19 中国航发哈尔滨东安发动机有限公司 Machining method for aviation thin-wall part based on machine-clamp integrated clamping
CN112247607A (en) * 2020-10-14 2021-01-22 常州工程职业技术学院 Thin-wall part turning clamp
CN112517946A (en) * 2020-12-01 2021-03-19 南京高精轨道交通设备有限公司 Clamp and lathe
CN112719792A (en) * 2020-12-15 2021-04-30 山西江淮重工有限责任公司 Processing method of opening thin-wall wedge ring and positioning and clamping device
CN112719792B (en) * 2020-12-15 2023-02-28 山西江淮重工有限责任公司 Processing method of opening thin-wall wedge ring and positioning and clamping device
CN113103026A (en) * 2021-03-09 2021-07-13 武汉镁里镁科技有限公司 Annular part machining clamp and annular part machining method
CN113245567A (en) * 2021-06-03 2021-08-13 哈尔滨汽轮机厂有限责任公司 Thin-wall end cover turning anti-deformation auxiliary tool and turning method
CN114260736A (en) * 2021-10-29 2022-04-01 中国航发西安动力控制科技有限公司 Opening sleeve for thin-wall step cover plate and thin-wall step cover plate machining method
CN113953864A (en) * 2021-11-15 2022-01-21 福洛德(上海)传动技术有限公司 Tool for machining thin-wall conical surface of ring disc part
CN114799231A (en) * 2022-06-16 2022-07-29 山西平阳重工机械有限责任公司 Turning method of thin-wall shell

Similar Documents

Publication Publication Date Title
CN206952561U (en) A kind of fixture for preventing the turning of thin-walled ring parts from deforming
CN102357782B (en) Machining method for cutting circumference sleeve part
US9579759B2 (en) Method and apparatus for forming thin discs
CN101972942B (en) One-step tool clamp for machining motor shell and using method thereof
CN202639882U (en) Pipeline turning clamp
CN205147883U (en) Clamp for drilling hole in flange plate
CN201124247Y (en) Clamp for processing two end surfaces of elastic thin cylindrical part
CN203936688U (en) A kind of axial location turning attachment that do not stop
CN104001951A (en) Clamp device for uniform-section ultra-thin-wall bearing ring outer surface turning
CN203804344U (en) Non-backlash centering auto-compensation positioning device
CN101367130A (en) Overlength straight pipeline member cutting method
CN204954385U (en) Universal centre frame
CN205600375U (en) Eccentric frock of planet wheel unwheeling stopping ring groove
CN105033823A (en) External grinding device for thin-walled part for motor
CN106041149B (en) Eccentric and special-shaped product Special clamp device
CN105171490A (en) Method for positioning workpiece through positioning clamp for lathe machining
CN204954619U (en) Bearing inner race cylindrical grinding fixture device
CN115229435B (en) Machining method for guaranteeing chromium plating outer diameter size of thin-wall slender guide cylinder
CN110722453A (en) Polishing clamp
CN103978239A (en) Clamp for drilling of center hole in turbine
CN201304573Y (en) Saddle-shaped lathe clamp
CN112059674A (en) Adjustable thin-wall shell vibration damping clamping device and operation method
CN207043761U (en) A kind of fixture for being used to process thin-walled ring external diameter
CN207447975U (en) The cutting frock of the outer eaves of annular of the spherical cover body of thin-walled
CN201940838U (en) Multipurpose elbow jig

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant