CN206614346U - A kind of rotary ultrasonic magnetic abrasive finishing device - Google Patents
A kind of rotary ultrasonic magnetic abrasive finishing device Download PDFInfo
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- CN206614346U CN206614346U CN201720286671.8U CN201720286671U CN206614346U CN 206614346 U CN206614346 U CN 206614346U CN 201720286671 U CN201720286671 U CN 201720286671U CN 206614346 U CN206614346 U CN 206614346U
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- grinding
- ultrasonic
- grinding fluid
- magnetically
- workpiece
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Abstract
The utility model is related to a kind of rotary ultrasonic magnetic abrasive finishing device, including grinding drive system, ultrasonic vibration system, magnetically grinding system and grinding fluid circulation；Ultrasonic vibration system is made up of supersonic generator, ultrasonic transducer and ultrasonic transformer, and ultrasonic transducer and ultrasonic transformer are integrated in ultrasonic knife bar；Magnetically grinding system is made up of magnetic pole and magnetically grinding particle, and magnetic pole bottom absorption magnetically grinding particle, magnetically grinding particle acts on workpiece surface and is ground；Workpiece is fixed in work nest, and work nest is moved horizontally with cross slid platform；Grinding fluid sprinkler head is set at the upper side of workpiece milling zone, work trench bottom sets grinding fluid recovery port, and grinding fluid sprinkler head and grinding fluid recovery port connect grinding fluid circulation respectively.The advantage of the utility model combination ultrasonic wave processing technology and Magnetic Abrasive Finishing technology, realizes the surface finishing to nonmetallic crisp hard material, and significantly improve lapping efficiency and workpiece surface quality.
Description
Technical field
The utility model is related to Magnetic Abrasive Finishing Technology field, more particularly to a kind of suitable for nonmetallic brittle material
Expect the rotary ultrasonic magnetic abrasive finishing device of surface grinding polishing.
Background technology
With the development of science and technology, application of the nonmetallic crisp hard material in modern industry is more and more extensive, however,
Because hardness of nonmetallic crisp and hard material height itself, fragility are big, therefore processing difficulties；Especially workpiece shapes are complicated, machining accuracy
And surface roughness requirements it is higher when, traditional diamond-making technique is difficult to realize Expected Results.
Rotary ultrasonic wave technology has good effect to processing crisp hard material, and rotary ultrasonic ripple revolves with machine tool chief axis
While turning, cutter (skive) also take part in the vibration at high speed along main shaft axial direction, and this causes abrasive particle in dead load, ultrasound
Constantly impacted under the collective effect that vibration and main shaft rotate, part to be processed surface scratched, so that machined material be ground into
Many small particles, improve processing efficiency.
Magnetic force grinding technique as a kind of unconventional precision machining method, because its have good flexibility, self-sharpening plus
The advantages of work strong adaptability, it can press and be attached to workpiece surface, change with the change of workpiece surface appearance, therefore be equally applicable to
Complex-shaped nonmetallic crisp hard material.
The content of the invention
The utility model provides a kind of rotary ultrasonic magnetic abrasive finishing device, with reference to ultrasonic wave processing technology and magnetic force
The advantage of grinding technology, realizes the surface finishing to nonmetallic crisp hard material, and significantly improve grinding plus
Work efficiency rate and workpiece surface quality.
In order to achieve the above object, the utility model is realized using following technical scheme：
A kind of rotary ultrasonic magnetic abrasive finishing device, including grinding drive system, ultrasonic vibration system, magnetically grinding
System and grinding fluid circulation；The ultrasonic vibration system is by supersonic generator, ultrasonic transducer and ultrasonic transformer group
Into wherein ultrasonic transducer and ultrasonic transformer are integrated in ultrasonic knife bar, and ultrasonic knife bar is arranged on the rotation in grinding drive system
On rotating motor main shaft and can concomitant rotation；Magnetically grinding system is made up of magnetic pole and magnetically grinding particle, and magnetic pole passes through spring cylinder
Folder is connected with ultrasonic transformer, and magnetic pole bottom absorption magnetically grinding particle, magnetically grinding particle acts on workpiece surface and is ground；Work
Part is fixed in work nest, and work nest is moved horizontally with cross slid platform；Grinding fluid sprinkler head is set at the upper side of workpiece milling zone,
Work trench bottom sets grinding fluid recovery port, and grinding fluid sprinkler head and grinding fluid recovery port connect grinding fluid circulation respectively.
The grinding drive system is made up of machine body, electric rotating machine and cross slid platform；Machine body by lathe base,
Column and crossbeam composition, electric rotating machine are fixed on crossbeam and can moved up and down with crossbeam along column；Cross slid platform is fixed on
On lathe base below work nest.
Described crossbeam one end is set on the outside of column by sleeve, and sleeve side is abreast provided with elevating screw with column,
Set in sleeve and lifting motor is connected by reducing gear at the top of lifting nut and elevating screw engaged transmission, elevating screw.
The supersonic generator and ultrasonic transducer realize that non-contact electromagnetic change type is supplied by upper and lower two-stage coil
Electricity；Wherein higher level's coil is fixed on the outside of electric rotating machine main shaft by coil case, and is connected by wire and supersonic generator
Connect；Subordinate's coil is wrapped on ultrasonic handle of a knife, and is rotated with ultrasonic handle of a knife.
The grinding fluid circulation is made up of grinding fluid conveyance conduit, grinding fluid containing tank and grinding fluid recovery channel,
The two ends of grinding fluid conveyance conduit connect grinding fluid sprinkler head and grinding fluid containing tank, the two ends point of grinding fluid recovery channel respectively
Lian Jie not grinding fluid recovery port and grinding fluid containing tank；Peristaltic pump and filter are set on grinding fluid conveyance conduit, grinding fluid is held
Agitator is set in groove.
Compared with prior art, the beneficial effects of the utility model are：
1) advantage of rotary ultrasonic wave technology and Magnetic Force Grinding Technology is combined, the skin processing to crisp and hard material is realized, shown
Work improves lapping efficiency and workpiece surface quality；
2) magnetically grinding particle absorption can not only be produced on magnetic pole with electric rotating machine main axis in workpiece surface
Scratch, tear, and vibratory impulse effect is produced by rotary ultrasonic ripple effect in the vertical direction, while workpiece is in cross slid platform
Effect is lower to carry out horizontal movement, adds the scope of grinding, and make grinding more fully, uniformly；
3) machine body can be changed a social system by common driller or milling machine, and simple in construction, manufacturing cost is low；
4) highly versatile, machining accuracy are high, can be widely used for the attrition process of all kinds of brittle property piece surfaces.
Brief description of the drawings
Fig. 1 is the structural representation of rotary ultrasonic magnetic abrasive finishing device described in the utility model.
Fig. 2 is the grinding mechanism figure of rotary ultrasonic magnetic abrasive finishing device described in the utility model.
In figure：1. the supersonic generator 7. of 5. electric rotating machine of lathe base 2. column, 3. crossbeam, 4. lifting motor 6.
The grinding fluid conveying of 12. cross slid platform of ultrasonic handle of a knife 9. magnetic pole, 10. magnetically grinding particle, 11. work nest of coil case 8. 13
The grinding fluid recovery channel of 18. workpiece of pipeline 14. peristaltic pump, 15 filter, 16. agitator, 17. grinding fluid containing tank 19.
Embodiment
Embodiment of the present utility model is described further below in conjunction with the accompanying drawings：
As shown in figure 1, a kind of rotary ultrasonic magnetic abrasive finishing device described in the utility model, including grinding drivetrain
System, ultrasonic vibration system, magnetically grinding system and grinding fluid circulation；The ultrasonic vibration system is occurred by ultrasonic wave
Device 6, ultrasonic transducer and ultrasonic transformer composition, wherein ultrasonic transducer and ultrasonic transformer are integrated in ultrasonic knife bar 8, ultrasound knife
Bar 8 is arranged on the main shaft of electric rotating machine 5 in grinding drive system and can concomitant rotation；Magnetically grinding system is by magnetic pole 9 and magnetic
Property polishing particles 10 constitute, magnetic pole 9 is connected by elastic collet chuck with ultrasonic transformer, the bottom of magnetic pole 9 absorption magnetically grinding particle 10, magnetic
Property polishing particles 10 act on the surface of workpiece 18 and are ground；Workpiece 18 is fixed in work nest 11, and work nest 11 is slided with cross
Platform 12 is moved horizontally；Grinding fluid sprinkler head is set at the upper side of workpiece milling zone, the bottom of work nest 11 sets grinding fluid recovery port, mill
Cut liquid sprinkler head and grinding fluid recovery port connects grinding fluid circulation respectively.
The grinding drive system is made up of machine body, electric rotating machine 5 and cross slid platform 12；Machine body is by lathe bottom
Seat 1, column 2 and crossbeam 3 are constituted, and electric rotating machine 5 is fixed on crossbeam 3 and can moved up and down with crossbeam 3 along column 2；Cross
Slide unit 12 is fixed on the lathe base 1 of the lower section of work nest 11.
Described one end of crossbeam 3 is set in the outside of column 2 by sleeve, and sleeve side is with column 2 abreast provided with lifting silk
Set in thick stick, sleeve at the top of lifting nut and elevating screw engaged transmission, elevating screw by reducing gear connection lifting motor 4.
The supersonic generator 6 and ultrasonic transducer realize non-contact electromagnetic change type by upper and lower two-stage coil
Power supply；Wherein higher level's coil is fixed on the outside of the main shaft of electric rotating machine 5 by coil case 7, and is occurred by wire and ultrasonic wave
Device 6 is connected；Subordinate's coil is wrapped on ultrasonic handle of a knife 8, and is rotated with ultrasonic handle of a knife 8.
The grinding fluid circulation is by grinding fluid conveyance conduit 13, grinding fluid containing tank 17 and grinding fluid recovery channel 19
Composition, the two ends of grinding fluid conveyance conduit 13 connect grinding fluid sprinkler head and grinding fluid containing tank 17, grinding fluid recovery tube respectively
The two ends in road 19 connect grinding fluid recovery port and grinding fluid containing tank 17 respectively；The He of peristaltic pump 14 is set on grinding fluid conveyance conduit 13
Agitator 16 is set in filter 15, grinding fluid containing tank 17.
As shown in Fig. 1~2, a kind of rotary ultrasonic magnetic abrasive finishing device described in the utility model, by the band of electric rotating machine 5
Dynamic magnetically grinding particle 10, which rotates, produces cutting force, and the ultrasonic wave that supersonic generator 6 is sent produces impulsive force by vibrating, altogether
Same-action reaches the effect for removing material and grinding on workpiece 18.
Lathe base 1 is arranged on ground by foundation bolt, and electric rotating machine 5 is fixed on crossbeam 3.Ultrasonic wave transducer
Device, ultrasonic transformer are integrated in inside ultrasonic handle of a knife 8, and ultrasonic handle of a knife 8 is arranged on the main shaft of electric rotating machine 5 by standard main shaft interface,
Realize that non-contact electromagnetic change type is powered by upper and lower level coil between supersonic generator 6 and ultrasonic transducer, higher level's coil
It is fixed on by coil case 7 in the main shaft shell of motor 5, subordinate's coil is wrapped on ultrasonic handle of a knife 8, with electric rotating machine 5
Main shaft rotation.Magnetic pole 9 is connected by elastic collet chuck with ultrasonic transformer, and 1~2mm processing gap is left between magnetic pole 9 and workpiece 18,
After magnetically grinding particle 10 is well mixed with lapping liquid, it is filled in the processing gap between magnetic pole 9 and workpiece 18, workpiece 18
It is fixed in work nest 11, and the horizontal movement of any direction is done with cross slid platform, by magnetically grinding particle during work pieces process
Extruding and scratching, acting on for excess stock and grinding is removed while being reached by the percussion of ultrasonic wave.
The effect of agitator 16 is to make grinding fluid evenly, and hydraulic pump 14 extracts grinding fluid by filter 15 out, filtering
Device 15 can fall the contaminant filter in grinding fluid, it is to avoid the impurity effect Workpiece Machining Accuracy in grinding fluid；Grinding fluid is conveyed
The grinding fluid that pipeline 13 is transported to grinding fluid in the surface of workpiece 18, work nest 11 flows back to mill by grinding fluid recovery channel 19 again
Cut in liquid container and reused.
A kind of course of work of rotary ultrasonic magnetic abrasive finishing device described in the utility model is as follows：
The clamping of workpiece 18 is in work nest 11, and the driving crossbeam 3 of lifting motor 4 is moved up and down along elevating screw, realizes magnetic
The adjustment in gap is processed between pole 9 and workpiece 18；After the completion of adjustment, magnetically grinding particle 10 is filled in processing gap, opened
Dynamic electric rotating machine 5 drives ultrasonic handle of a knife 8 and magnetic pole 9 to rotate, while start supersonic generator 6, what supersonic generator 6 was produced
Electric signal is transferred to subordinate's coil by higher level's coil by coupling, magnetically grinding particle 10 is produced impact in workpiece surface
Effect；The position of workpiece 18 can be changed along any direction all around by cross slid platform 12, so as to the difference of workpiece 18
Position is ground；Grinding fluid circulation is opened while processing, grinding fluid is sprayed at the surface of workpiece 18, final high-quality height
Effect ground completes the grinding and polishing to workpiece surface.
It is described above, only the utility model preferably embodiment, but protection domain of the present utility model is not
This is confined to, any one skilled in the art is in the technical scope that the utility model is disclosed, according to this practicality
New technical scheme and its design is subject to equivalent substitution or change, should all cover within protection domain of the present utility model.
Claims (5)
1. a kind of rotary ultrasonic magnetic abrasive finishing device, it is characterised in that including grinding drive system, ultrasonic activation system
System, magnetically grinding system and grinding fluid circulation；The ultrasonic vibration system is by supersonic generator, ultrasonic transducer
With ultrasonic transformer composition, wherein ultrasonic transducer and ultrasonic transformer are integrated in ultrasonic knife bar, and ultrasonic knife bar is arranged on grinding and driven
On electric rotating machine main shaft in system and can concomitant rotation；Magnetically grinding system is made up of magnetic pole and magnetically grinding particle, magnetic pole
It is connected by elastic collet chuck with ultrasonic transformer, magnetic pole bottom absorption magnetically grinding particle, magnetically grinding particle acts on workpiece surface
It is ground；Workpiece is fixed in work nest, and work nest is moved horizontally with cross slid platform；Mill is set at the upper side of workpiece milling zone
Liquid sprinkler head is cut, work trench bottom sets grinding fluid recovery port, and grinding fluid sprinkler head and grinding fluid recovery port connect grinding fluid respectively
The circulatory system.
2. a kind of rotary ultrasonic magnetic abrasive finishing device according to claim 1, it is characterised in that the grinding driving
System is made up of machine body, electric rotating machine and cross slid platform；Machine body is made up of lathe base, column and crossbeam, rotation
Motor is fixed on crossbeam and can moved up and down with crossbeam along column；Cross slid platform is fixed on the lathe bottom below work nest
On seat.
3. a kind of rotary ultrasonic magnetic abrasive finishing device according to claim 2, it is characterised in that described crossbeam one end
It is set in by sleeve on the outside of column, sleeve side is abreast provided with elevating screw, sleeve with column and sets lifting nut and liter
Drop and lifting motor is connected by reducing gear at the top of leading screw engaged transmission, elevating screw.
4. a kind of rotary ultrasonic magnetic abrasive finishing device according to claim 1, it is characterised in that the ultrasonic wave hair
Raw device and ultrasonic transducer realize that non-contact electromagnetic change type is powered by upper and lower two-stage coil；Wherein higher level's coil passes through
Coil case is fixed on the outside of electric rotating machine main shaft, and is connected by wire with supersonic generator；Subordinate's coil is wrapped in super
On sound handle of a knife, and rotated with ultrasonic handle of a knife.
5. a kind of rotary ultrasonic magnetic abrasive finishing device according to claim 1, it is characterised in that the grinding fluid is followed
Loop system is made up of grinding fluid conveyance conduit, grinding fluid containing tank and grinding fluid recovery channel, the two ends of grinding fluid conveyance conduit
Connection grinding fluid sprinkler head and grinding fluid containing tank respectively, the two ends of grinding fluid recovery channel connect respectively grinding fluid recovery port and
Grinding fluid containing tank；Set on grinding fluid conveyance conduit in peristaltic pump and filter, grinding fluid containing tank and set agitator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720286671.8U CN206614346U (en) | 2017-03-23 | 2017-03-23 | A kind of rotary ultrasonic magnetic abrasive finishing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720286671.8U CN206614346U (en) | 2017-03-23 | 2017-03-23 | A kind of rotary ultrasonic magnetic abrasive finishing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206614346U true CN206614346U (en) | 2017-11-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720286671.8U Expired - Fee Related CN206614346U (en) | 2017-03-23 | 2017-03-23 | A kind of rotary ultrasonic magnetic abrasive finishing device |
Country Status (1)
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108098566A (en) * | 2017-12-19 | 2018-06-01 | 新昌县三和轴承有限公司 | A kind of bearing grinder |
| CN108161592A (en) * | 2017-12-20 | 2018-06-15 | 南浔双林永欣电子元件厂 | A kind of end-face grinding machine for cylindrical magnetic core |
| CN108214080A (en) * | 2018-01-05 | 2018-06-29 | 全椒县同鑫模具配套有限公司 | A kind of novel colored metal working lathe |
| CN108818163A (en) * | 2018-07-03 | 2018-11-16 | 嘉兴学院 | Multifrequency vibration micro-structure surface processing unit (plant) |
| CN108857840A (en) * | 2018-07-25 | 2018-11-23 | 浙江工业大学 | The photochemistry machining platform and polishing fluid replacing options of replaceable polishing fluid |
| CN109227231A (en) * | 2018-09-19 | 2019-01-18 | 贵州航天天马机电科技有限公司 | A kind of hard brittle material processing unit |
| CN109277886A (en) * | 2018-09-19 | 2019-01-29 | 贵州航天天马机电科技有限公司 | A kind of bearing ball burnishing device |
| CN109623504A (en) * | 2018-11-22 | 2019-04-16 | 中国人民解放军火箭军工程大学 | A kind of Machining System and method of supersonic vibration assistant grinding and magnetic force polishing |
| CN109909814A (en) * | 2019-03-21 | 2019-06-21 | 辽宁科技大学 | A kind of device of the compound device to hole burr removal of electrolysis rotary ultrasonic magnetic force |
| CN109986414A (en) * | 2019-03-21 | 2019-07-09 | 辽宁科技大学 | A kind of device being electrolysed rotary ultrasonic magnetic force composite polishing plane |
| CN110000621A (en) * | 2019-03-15 | 2019-07-12 | 辽宁科技大学 | A kind of magnetic grinder and magnetic grinding method for big plane polishing |
| CN110000620A (en) * | 2019-03-15 | 2019-07-12 | 辽宁科技大学 | A kind of magnetic abrasive finishing device and method of skin processing zanjon keyway inner surface |
| CN110103104A (en) * | 2019-05-17 | 2019-08-09 | 辽宁科技大学 | A kind of device and method polishing 45 ° of parting O shape die for rubber seal rings |
| CN110370099A (en) * | 2019-05-30 | 2019-10-25 | 浙江工业大学 | The method of the micro- hemisphere cavity plate array of rotary ultrasonic machining combination magnetic abrasive finishing |
| CN111251080A (en) * | 2020-03-12 | 2020-06-09 | 岭南师范学院 | Online grinding method and device for fine tool |
| CN113319730A (en) * | 2021-06-01 | 2021-08-31 | 南京航太机电有限公司 | Magnetic grinding device and method for pipe fitting with complex inner cavity |
| CN113334149A (en) * | 2021-07-22 | 2021-09-03 | 广东技术师范大学 | Ultrasonic magnetorheological chemical composite polishing device and method |
| CN115157021A (en) * | 2022-07-05 | 2022-10-11 | 中国航发贵阳发动机设计研究所 | Magnetic ultrasonic composite grinding device for large-size variable-section complex cylindrical part |
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2017
- 2017-03-23 CN CN201720286671.8U patent/CN206614346U/en not_active Expired - Fee Related
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108098566A (en) * | 2017-12-19 | 2018-06-01 | 新昌县三和轴承有限公司 | A kind of bearing grinder |
| CN108161592A (en) * | 2017-12-20 | 2018-06-15 | 南浔双林永欣电子元件厂 | A kind of end-face grinding machine for cylindrical magnetic core |
| CN108214080B (en) * | 2018-01-05 | 2020-05-01 | 全椒县同鑫模具配套有限公司 | Novel nonferrous metal processing lathe |
| CN108214080A (en) * | 2018-01-05 | 2018-06-29 | 全椒县同鑫模具配套有限公司 | A kind of novel colored metal working lathe |
| CN108818163A (en) * | 2018-07-03 | 2018-11-16 | 嘉兴学院 | Multifrequency vibration micro-structure surface processing unit (plant) |
| CN108857840A (en) * | 2018-07-25 | 2018-11-23 | 浙江工业大学 | The photochemistry machining platform and polishing fluid replacing options of replaceable polishing fluid |
| CN109277886A (en) * | 2018-09-19 | 2019-01-29 | 贵州航天天马机电科技有限公司 | A kind of bearing ball burnishing device |
| CN109227231A (en) * | 2018-09-19 | 2019-01-18 | 贵州航天天马机电科技有限公司 | A kind of hard brittle material processing unit |
| CN109623504A (en) * | 2018-11-22 | 2019-04-16 | 中国人民解放军火箭军工程大学 | A kind of Machining System and method of supersonic vibration assistant grinding and magnetic force polishing |
| CN110000621A (en) * | 2019-03-15 | 2019-07-12 | 辽宁科技大学 | A kind of magnetic grinder and magnetic grinding method for big plane polishing |
| CN110000620A (en) * | 2019-03-15 | 2019-07-12 | 辽宁科技大学 | A kind of magnetic abrasive finishing device and method of skin processing zanjon keyway inner surface |
| CN110000621B (en) * | 2019-03-15 | 2024-02-09 | 辽宁科技大学 | Magnetic grinding device and magnetic grinding method for large-plane polishing |
| CN109909814A (en) * | 2019-03-21 | 2019-06-21 | 辽宁科技大学 | A kind of device of the compound device to hole burr removal of electrolysis rotary ultrasonic magnetic force |
| CN109986414A (en) * | 2019-03-21 | 2019-07-09 | 辽宁科技大学 | A kind of device being electrolysed rotary ultrasonic magnetic force composite polishing plane |
| CN110103104A (en) * | 2019-05-17 | 2019-08-09 | 辽宁科技大学 | A kind of device and method polishing 45 ° of parting O shape die for rubber seal rings |
| CN110103104B (en) * | 2019-05-17 | 2024-03-26 | 辽宁科技大学 | Device and method for polishing 45-degree parting O-shaped rubber sealing ring mold |
| CN110370099B (en) * | 2019-05-30 | 2021-01-29 | 浙江工业大学 | Method for processing micro-hemispherical concave die array by combining rotary ultrasonic processing with magnetic grinding |
| CN110370099A (en) * | 2019-05-30 | 2019-10-25 | 浙江工业大学 | The method of the micro- hemisphere cavity plate array of rotary ultrasonic machining combination magnetic abrasive finishing |
| CN111251080A (en) * | 2020-03-12 | 2020-06-09 | 岭南师范学院 | Online grinding method and device for fine tool |
| CN113319730A (en) * | 2021-06-01 | 2021-08-31 | 南京航太机电有限公司 | Magnetic grinding device and method for pipe fitting with complex inner cavity |
| CN113319730B (en) * | 2021-06-01 | 2022-06-24 | 南京航太机电有限公司 | Magnetic grinding device and method for pipe fitting with complex inner cavity |
| CN113334149A (en) * | 2021-07-22 | 2021-09-03 | 广东技术师范大学 | Ultrasonic magnetorheological chemical composite polishing device and method |
| CN115157021A (en) * | 2022-07-05 | 2022-10-11 | 中国航发贵阳发动机设计研究所 | Magnetic ultrasonic composite grinding device for large-size variable-section complex cylindrical part |
| CN115157021B (en) * | 2022-07-05 | 2024-04-09 | 中国航发贵阳发动机设计研究所 | Magnetic force ultrasonic composite grinding device for large-size variable-section complex cylindrical part |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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| CF01 | Termination of patent right due to non-payment of annual fee |