[go: up one dir, main page]

CN105598529A - Combined broach for broaching compressor cylinder - Google Patents

Combined broach for broaching compressor cylinder Download PDF

Info

Publication number
CN105598529A
CN105598529A CN201610072949.1A CN201610072949A CN105598529A CN 105598529 A CN105598529 A CN 105598529A CN 201610072949 A CN201610072949 A CN 201610072949A CN 105598529 A CN105598529 A CN 105598529A
Authority
CN
China
Prior art keywords
assembly
broaching
broaching tool
broach
built
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
CN201610072949.1A
Other languages
Chinese (zh)
Other versions
CN105598529B (en
Inventor
杜金
张�诚
喻继江
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.)
Guangdong Midea Toshiba Compressor Corp
Guangdong Meizhi Compressor Co Ltd
Anhui Meizhi Precision Manufacturing Co Ltd
Original Assignee
Guangdong Meizhi Compressor Co Ltd
Anhui Meizhi Precision Manufacturing 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 Guangdong Meizhi Compressor Co Ltd, Anhui Meizhi Precision Manufacturing Co Ltd filed Critical Guangdong Meizhi Compressor Co Ltd
Priority to CN201610072949.1A priority Critical patent/CN105598529B/en
Publication of CN105598529A publication Critical patent/CN105598529A/en
Application granted granted Critical
Publication of CN105598529B publication Critical patent/CN105598529B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23DPLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D43/00Broaching tools
    • B23D43/02Broaching tools for cutting by rectilinear movement
    • B23D43/04Broaching tools for cutting by rectilinear movement having inserted cutting edges

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling, Broaching, Filing, Reaming, And Others (AREA)

Abstract

The invention discloses a combined broach for broaching a compressor cylinder. The combined broach comprises a broaching rod, a first broach component which is arranged on the broaching rod and is used for broaching the compressor cylinder to form a sliding vane groove, and a second broach component which is used for broaching the compressor cylinder so as to form a side wall groove in the side wall of the sliding vane groove. According to the combined broach, the sliding vane groove and the side wall groove can be processed in one time, so that the processing process can be reduced, the processing cost can be reduced, and the processing precision can be guaranteed.

Description

For the built-up broach of compresser cylinder broaching
Technical field
The present invention relates to Compressor Manufacturing field, particularly a kind of built-up broach for compresser cylinder broaching.
Background technology
Traditional compresser cylinder vane slot is simple straight groove structure, in recent years finds to pass through at cylinder vane slot groove at side surface,Can improve compressor efficiency. But in the prior art, vane slot and sidewall channels need to be processed respectively, can not be simultaneously by slide plateGroove and sidewall channels process, and cause that routine techniques operation increases, cost rises.
Summary of the invention
The present invention is intended to solve at least to a certain extent one of technical problem in correlation technique. For this reason, the present invention proposes onePlant the built-up broach for compresser cylinder broaching, this built-up broach can once process vane slot and sidewall channels, subtractsLack manufacturing procedure, reduced processing cost, guaranteed machining accuracy.
According to the built-up broach for compresser cylinder broaching of the present invention, comprising: broaching tool bar; The first broaching tool assembly, described inThe first broaching tool assembly is arranged on described broaching tool bar and for described compresser cylinder is broached to form vane slot; SecondBroaching tool assembly, described the second broaching tool assembly is for broaching with shape on the sidewall of described vane slot to described compresser cylinderBecome sidewall channels.
According to the built-up broach for compresser cylinder broaching of the present invention, by arranging, cylinder is broached with at vane slotSidewall on form the second broaching tool assembly of sidewall channels, can make vane slot and sidewall channels one-shot forming, reduced processing workOrder, reduce processing cost, guaranteed machining accuracy.
In addition, the built-up broach for compresser cylinder broaching according to the present invention can also have following additional technical characterictic:
According to one embodiment of present invention, described the second broaching tool assembly is arranged on broaching tool bar or described the first broaching tool assembly.
According to one embodiment of present invention, described the first broaching tool assembly comprises: the first rose reamer assembly, thick knife assembly, theTwo chamfering knife assemblies and smart knife assembly.
According to one embodiment of present invention, described the second broaching tool assembly is arranged on described broaching tool bar, described the second broaching tool groupPart is between described thick knife assembly and described the second rose reamer assembly or be positioned at described the second rose reamer assembly and described smart cutterBetween assembly.
According to one embodiment of present invention, described the second broaching tool assembly is arranged on described thick knife assembly.
According to one embodiment of present invention, described the second broaching tool assembly is arranged on described the second rose reamer assembly.
According to one embodiment of present invention, described the second broaching tool assembly is arranged on described smart knife assembly.
According to one embodiment of present invention, described the second broaching tool assembly be shaped as trapezoidal, circular, triangle or rectangle.
According to one embodiment of present invention, in the axial direction of broaching tool bar, described the first rose reamer assembly, described thick knife assembly,Described the second rose reamer assembly, described the second broaching tool assembly and described smart knife assembly are arranged successively.
According to one embodiment of present invention, described the first rose reamer assembly comprises multiple the first rose reamers, described thick knife assemblyComprise that multiple thick cuttves, described the second rose reamer assembly comprise that multiple the second rose reamers, described the second broaching tool assembly comprise multipleTwo broaching tools, described smart knife assembly comprise multiple smart cuttves.
Additional aspect of the present invention and advantage in the following description part provide, and part will become bright from the following descriptionAobvious, or recognize by practice of the present invention.
Brief description of the drawings
Above-mentioned and/or additional aspect of the present invention and advantage from conjunction with below accompanying drawing to becoming obvious the description of embodimentWith easy understanding, wherein:
Fig. 1 is according to the schematic diagram of the built-up broach of the embodiment of the present invention;
Fig. 2 is according to the schematic diagram of multiple difference cylinders of the embodiment of the present invention;
Fig. 3 is according to the cutaway view of the second broaching tool assembly of the embodiment of the present invention;
Fig. 4 is the schematic diagram that is arranged on thick knife assembly according to the second broaching tool assembly of the embodiment of the present invention;
Fig. 5 is the schematic diagram that is arranged on the second rose reamer assembly according to the second broaching tool assembly of the embodiment of the present invention;
Fig. 6 is arranged on the schematic diagram on smart knife assembly according to the second broaching tool assembly of the embodiment of the present invention.
Reference numeral:
Built-up broach 100,
Broaching tool bar 110,
The first rose reamer assembly 121, thick knife assembly 122, the second rose reamer assemblies 123, smart knife assembly 124,
The second broaching tool assembly 130,
Cylinder 200, vane slot 201, sidewall channels 202.
Detailed description of the invention
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings. Below by with reference to accompanying drawingThe embodiment describing is exemplary, is intended to for explaining the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, it will be appreciated that, term " " center ", " longitudinally ", " laterally ", " length ", " width "," thickness ", " on ", D score, 'fornt', 'back', " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior "," outward ", " clockwise ", " counterclockwise ", " axially ", " radially ", " circumferentially " etc. instruction orientation or position relationship be based onOrientation shown in the drawings or position relationship, be only the present invention for convenience of description and simplified characterization, instead of instruction or hint instituteThe device referring to or element must have specific orientation, construct and operation with specific orientation, therefore can not be interpreted as thisBright restriction.
In addition, term " first ", " second " be only for describing object, and can not be interpreted as instruction or hint relative importanceOr the implicit quantity that indicates indicated technical characterictic. Thus, the feature that is limited with " first ", " second " can be expressedOr impliedly comprise at least one this feature. In description of the invention, the implication of " multiple " is at least two, for example twoIndividual, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection ", " fixing "Should be interpreted broadly Deng term, for example, can be to be fixedly connected with, and can be also to removably connect, or integral; Can beMechanical connection can be also electrical connection or each other can communication; Can be to be directly connected, also can pass through the indirect phase of intermediaryConnecting, can be the connection of two element internals or the interaction relationship of two elements, unless separately there is clear and definite restriction. ForThose of ordinary skill in the art, can understand above-mentioned term concrete meaning in the present invention as the case may be.
Below in conjunction with Fig. 1 to Fig. 6, the built-up broach of broaching for compresser cylinder 200 100 of the embodiment of the present invention is carried outDescribe in detail.
Can comprise that according to the built-up broach 100 for compresser cylinder broaching of the embodiment of the present invention broaching tool bar 110, first drawsKnife assembly and the second broaching tool assembly 130.
Wherein, broaching tool bar 110 is supporting construction, and the first broaching tool assembly and the second broaching tool assembly 130 are all direct or indirectBe arranged on broaching tool bar 110, the two ends of broaching tool bar 110 (upper pull head and lower pull head) locked by broaching machine, with cylinder 200 phasesMotion is realized to the broaching processing to cylinder 200.
The first broaching tool assembly is arranged on broaching tool bar 110 and for compresser cylinder 200 is broached to form vane slot201, the second broaching tool assemblies 130 are for broaching to form sidewall on the sidewall at vane slot 201 to compresser cylinder 200Groove 202.
In the time that compresser cylinder 200 is broached, cylinder 200 slides along broaching tool bar 110 from top to bottom, arrives broaching tool, vane slot 201 and sidewall channels 202 can be completed by broaching when the bottom of bar 110. That is to say, with of the prior artMoulding is different respectively with sidewall channels 202 for vane slot 201, and built-up broach 100 of the present invention can be by vane slot 201 and sidewallGroove 202 one-shot formings.
According to the built-up broach 100 for compresser cylinder broaching of the embodiment of the present invention, by arranging, cylinder 200 is drawnCut the second broaching tool assembly 130 to form sidewall channels 202 on the sidewall at vane slot 201, can make vane slot 201 HesSidewall channels 202 one-shot formings, have reduced manufacturing procedure, have reduced processing cost, have guaranteed machining accuracy.
In some embodiments of the invention, as shown in Fig. 1, Fig. 4 to Fig. 5, the second broaching tool assembly 130 is arranged on broaching tool bar110 or first on broaching tool assembly. In the time that the second broaching tool assembly 130 is arranged on the first broaching tool assembly, the second broaching tool assembly 130Be configured to be arranged on the cutting edge on the first broaching tool assembly; In the time that the second broaching tool assembly 130 is arranged on broaching tool bar 110, theTwo broaching tool assemblies 130 not only have cutting edge, also have the connecting portion that connects cutting edge and broaching tool bar 110.
In some embodiments of the invention, as shown in Figure 1, the first broaching tool assembly comprises the first rose reamer assembly 121, thick cutterAssembly 122, the second rose reamer assembly 123 and smart knife assembly 124.
Wherein, the first rose reamer assembly 121 is for cutting to form to cylinder 200 in vane slot 201 and cylinder 200Chamfering between perisporium, the first rose reamer assembly 121 can comprise multiple the first rose reamers, the length of the first rose reamer fromDirection top to bottm increases gradually, and the angle of cutting edge becomes greatly gradually, when cylinder 200 is completely by the first rose reamer assembly 121After, the chamfering between vane slot 201 and cylinder 200 perisporiums is processed complete.
Thick knife assembly 122 can carry out preliminary broaching to form the blank of vane slot 201 to cylinder 200, thick knife assembly 122Can comprise multiple thick cuttves, the length of multiple thick cuttves increases gradually in direction from top to bottom, when cylinder 200 is by thick cutterAfter assembly 122, the blank of vane slot 201 completes substantially.
The second rose reamer assembly 123 can be broached and form chamfering, first with the outer end at vane slot 201 cylinder 200The length of rose reamer can increase gradually in direction from top to bottom, when cylinder 200 is by after the second rose reamer assembly 123,The chamfering of the outer end of vane slot 201 is processed complete.
Essence knife assembly 124 can refine to improve to the vane slot of first one-step forming 201 precision of vane slot 201, smart cutterAssembly 124 can comprise multiple smart cuttves, and the length of multiple smart cuttves can be consistent, when cylinder 200 is by after smart knife assembly 124,Vane slot 201 is substantially processed complete.
In some embodiments of the invention, as shown in figures 1 and 3, the second broaching tool assembly 130 is arranged on broaching tool bar 110Upper, and the second broaching tool assembly 130 is between thick knife assembly 122 and the second rose reamer assembly 123 or be positioned at the second chamferingBetween knife assembly 123 and smart knife assembly 124.
That is to say, the second broaching tool assembly 130 can be independent broaching tool assembly, only for cutting sidewall channels 202, at thick cutterAssembly 122 preparatory processings go out after vane slot 201, and the sidewall of vane slot 201 is cut to form sidewall channels 202; WhenSo, be understandable that, also can process after the chamfering of vane slot 201 outer ends, to cunning at the second rose reamer assembly 123The sidewall of film trap 201 processes to form sidewall channels 202.
In some embodiments of the invention, as shown in Figure 4, the second broaching tool assembly 130 can be arranged on thick knife assembly 122On. That is to say, when thick knife assembly 122 broaches to begin to take shape vane slot 201 to cylinder 200, secondBroaching tool assembly 130 can process to form sidewall channels 202 to the sidewall of vane slot 201.
Alternatively, as shown in Figure 5, the second broaching tool assembly 130 can be arranged on the second rose reamer assembly 123. NamelySay, when the second rose reamer assembly 123 broaches to form the chamfering of vane slot 201 outer ends to vane slot 201,The second broaching tool assembly 130 can process to form sidewall channels 202 to the sidewall of vane slot 201.
Alternatively, as shown in Figure 6, the second broaching tool assembly 130 can be arranged on smart knife assembly 124. That is to say,When essence knife assembly 124 refines vane slot 201, the second broaching tool assembly 130 can be to the sidewall of vane slot 201Process to form sidewall channels 202.
Be understandable that, the second broaching tool assembly 130 can comprise multiple the second broaching tools, and the cutting edge of multiple the second broaching tools canProgressively to increase, and then progressively complete the moulding of sidewall channels 202.
In some embodiments of the invention, in conjunction with Fig. 2 be appreciated that the second broaching tool assembly 130 shape can for trapezoidal,Circle, triangle or rectangle, but be not limited to this. The second broaching tool assembly 130 is any shape, in the side to vane slot 201After wall has been broached, sidewall channels 202 is exactly any shape.
In some embodiments of the invention, as shown in Figure 1, in the axial direction of broaching tool bar 110, the first rose reamer assembly 121,Thick knife assembly 122, the second rose reamer assembly 123, the second broaching tool assembly 130 and smart knife assembly 124 are arranged successively.
In sum, built-up broach 100 of the present invention, by the second broaching tool assembly 130 is set, can time processing go out vane slot201 and sidewall channels 202, improve manufacturing procedure, reduced processing cost.
In the present invention, unless otherwise clearly defined and limited, First Characteristic Second Characteristic " on " or D score canBeing that the first and second features directly contact, or the first and second features are by intermediary mediate contact. And, theOne feature Second Characteristic " on ", " top " and " above " but First Characteristic directly over Second Characteristic orOblique upper, or only represent that First Characteristic level height is higher than Second Characteristic. First Characteristic Second Characteristic " under "," below " and " below " can be First Characteristic under Second Characteristic or tiltedly, or only represents the first spyLevy level height and be less than Second Characteristic.
In the description of this description, reference term " embodiment ", " some embodiment ", " example ", " specifically showExample " or the description of " some examples " etc. the specific features that means to describe in conjunction with this embodiment or example, structure, material orFeature is contained at least one embodiment of the present invention or example. In this manual, the schematic statement to above-mentioned termNot must for be identical embodiment or example. And specific features, structure, material or the feature of description canIn one or more embodiment in office or example with suitable mode combination. In addition, not conflicting in the situation that, abilityThe technical staff in territory can enter the feature of the different embodiment that describe in this description or example and different embodiment or exampleRow combination and combination.
Although illustrated and described embodiments of the invention above, be understandable that, above-described embodiment is exemplary,Can not be interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be to above-described embodimentChange, amendment, replacement and modification.

Claims (10)

1. for a built-up broach for compresser cylinder broaching, it is characterized in that, comprising:
Broaching tool bar;
The first broaching tool assembly, described the first broaching tool assembly is arranged on described broaching tool bar and for described compresser cylinder is carried outBroaching is to form vane slot;
The second broaching tool assembly, described the second broaching tool assembly is for broaching to described compresser cylinder with at described vane slotOn sidewall, form sidewall channels.
2. the built-up broach for compresser cylinder broaching according to claim 1, is characterized in that, described second drawsKnife assembly is arranged on broaching tool bar or described the first broaching tool assembly.
3. the built-up broach for compresser cylinder broaching according to claim 2, is characterized in that, described first drawsKnife assembly comprises: the first rose reamer assembly, thick knife assembly, the second rose reamer assembly and smart knife assembly.
4. the built-up broach for compresser cylinder broaching according to claim 3, is characterized in that, described second drawsKnife assembly is arranged on described broaching tool bar, and described the second broaching tool assembly is positioned at described thick knife assembly and described the second rose reamer assemblyBetween or between described the second rose reamer assembly and described smart knife assembly.
5. the built-up broach for compresser cylinder broaching according to claim 3, is characterized in that, described second drawsKnife assembly is arranged on described thick knife assembly.
6. the built-up broach for compresser cylinder broaching according to claim 3, is characterized in that, described second drawsKnife assembly is arranged on described the second rose reamer assembly.
7. the built-up broach for compresser cylinder broaching according to claim 3, is characterized in that, described second drawsKnife assembly is arranged on described smart knife assembly.
8. according to the built-up broach for compresser cylinder broaching described in any one in claim 1-7, it is characterized in that,Being shaped as of described the second broaching tool assembly is trapezoidal, circular, triangle or rectangle.
9. the built-up broach for compresser cylinder broaching according to claim 4, is characterized in that, at broaching tool barAxially upper, described the first rose reamer assembly, described thick knife assembly, described the second rose reamer assembly, described the second broaching tool assemblyArrange successively with described smart knife assembly.
10. according to the built-up broach for compresser cylinder broaching described in any one in claim 1-9, it is characterized in that,Described the first rose reamer assembly comprises that multiple the first rose reamers, described thick knife assembly comprise multiple thick cuttves, described the second rose reamerAssembly comprises that multiple the second rose reamers, described the second broaching tool assembly comprise that multiple the second broaching tools, described smart knife assembly comprise multipleEssence cutter.
CN201610072949.1A 2016-02-02 2016-02-02 Built-up broach for compresser cylinder broaching Active CN105598529B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610072949.1A CN105598529B (en) 2016-02-02 2016-02-02 Built-up broach for compresser cylinder broaching

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610072949.1A CN105598529B (en) 2016-02-02 2016-02-02 Built-up broach for compresser cylinder broaching

Publications (2)

Publication Number Publication Date
CN105598529A true CN105598529A (en) 2016-05-25
CN105598529B CN105598529B (en) 2018-03-23

Family

ID=55979157

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610072949.1A Active CN105598529B (en) 2016-02-02 2016-02-02 Built-up broach for compresser cylinder broaching

Country Status (1)

Country Link
CN (1) CN105598529B (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002018084A1 (en) * 2000-08-31 2002-03-07 Hispano-Suiza Spindle for machining accurate inner grooves
CN2897514Y (en) * 2006-03-15 2007-05-09 东风汽车有限公司 End face tooth combined broach
CN201613393U (en) * 2010-03-09 2010-10-27 温州雄豹自动化设备制造厂 Multifunctional combined broach device
CN203664813U (en) * 2013-12-20 2014-06-25 綦江齿轮传动有限公司 Involute spline and round hole combined finishing broach
CN104191036A (en) * 2014-08-12 2014-12-10 金华市红太阳工具厂 Special-shaped hole broach and machining process method thereof
CN204075371U (en) * 2014-07-04 2015-01-07 长春一汽天奇精锐工具有限公司 A kind of built-up broach
CN105057778A (en) * 2015-09-24 2015-11-18 成都格润特高新材料有限公司 Solid carbide internal and external chamfering combined broaching tool
CN105215469A (en) * 2015-11-04 2016-01-06 恒锋工具股份有限公司 A kind of Combined hard broaching tool

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002018084A1 (en) * 2000-08-31 2002-03-07 Hispano-Suiza Spindle for machining accurate inner grooves
CN2897514Y (en) * 2006-03-15 2007-05-09 东风汽车有限公司 End face tooth combined broach
CN201613393U (en) * 2010-03-09 2010-10-27 温州雄豹自动化设备制造厂 Multifunctional combined broach device
CN203664813U (en) * 2013-12-20 2014-06-25 綦江齿轮传动有限公司 Involute spline and round hole combined finishing broach
CN204075371U (en) * 2014-07-04 2015-01-07 长春一汽天奇精锐工具有限公司 A kind of built-up broach
CN104191036A (en) * 2014-08-12 2014-12-10 金华市红太阳工具厂 Special-shaped hole broach and machining process method thereof
CN105057778A (en) * 2015-09-24 2015-11-18 成都格润特高新材料有限公司 Solid carbide internal and external chamfering combined broaching tool
CN105215469A (en) * 2015-11-04 2016-01-06 恒锋工具股份有限公司 A kind of Combined hard broaching tool

Also Published As

Publication number Publication date
CN105598529B (en) 2018-03-23

Similar Documents

Publication Publication Date Title
US20120282047A1 (en) Internal Groove Insert and Tool Holder Therefor
CN208853538U (en) A continuous stamping die for four automobile front wall baffle reinforcement plates
CN109759523A (en) A kind of online cutting-off method in frame crossbeam abnormal shape end
KR20140109941A (en) Device and method for the deep drawing of shell parts with integrated head and frame trimming
CN103071821A (en) Insert design feature for side pressing technology
JPS63277701A (en) Press tool and blade insert formed by sintering blank molded using the same
CN105014447B (en) A kind of frock clamp of T-shaped automatic door guide rail
EP2933043A1 (en) A method and a device for manufacturing a cutting insert green body
CN201768800U (en) Trimming die
CN108941808A (en) A kind of inner hole key slot processing method of hard alloy cover parts
CN105598529A (en) Combined broach for broaching compressor cylinder
CN110976625A (en) Punching and bending composite die for copper bus processing
US10239223B2 (en) Cutting table for cutting a fiber preform obtained by three-dimensional weaving, and a cutting method using such a table
CN103586509A (en) Forming spot-facer
CN209716299U (en) A kind of online disconnecting device in frame crossbeam abnormal shape end
US3253318A (en) Centrifugal fan manufacturing
JPS6032435B2 (en) Motor blank manufacturing method and its cutting tool
CN104582919B (en) For producing equipment and the method for prefabricated component
US9902004B2 (en) Helical broach
CN109352071A (en) A kind of broaching tool positioning clamping device
CN104014667B (en) A kind of valve rod skeleton processing method
CN106102947A (en) For having the mould with backing-out punch of the stamping parts of rim channel
CN212598419U (en) Sheet metal component auxiliary positioning structure that bends
CN202239253U (en) Brake forming and cutting die
CN221087418U (en) Engine oil shell manufacturing tool

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant