CN112692388A - Electric spark machining fixture for acoustic emission sensor - Google Patents
Electric spark machining fixture for acoustic emission sensor Download PDFInfo
- Publication number
- CN112692388A CN112692388A CN202110001654.6A CN202110001654A CN112692388A CN 112692388 A CN112692388 A CN 112692388A CN 202110001654 A CN202110001654 A CN 202110001654A CN 112692388 A CN112692388 A CN 112692388A
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- Prior art keywords
- acoustic emission
- emission sensor
- clamp
- plate
- clamp shell
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000003754 machining Methods 0.000 title claims abstract description 21
- 238000010892 electric spark Methods 0.000 title abstract description 12
- 230000005540 biological transmission Effects 0.000 claims abstract description 28
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 238000009760 electrical discharge machining Methods 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 4
- 239000011261 inert gas Substances 0.000 claims description 3
- 210000004712 air sac Anatomy 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 10
- 238000001514 detection method Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 238000009413 insulation Methods 0.000 description 7
- 238000007789 sealing Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000012224 working solution Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H11/00—Auxiliary apparatus or details, not otherwise provided for
- B23H11/003—Mounting of workpieces, e.g. working-tables
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H11/00—Auxiliary apparatus or details, not otherwise provided for
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention discloses a clamp for electric spark machining for an acoustic emission sensor, which comprises a clamp shell, wherein a connecting support rod is fixedly arranged at the bottom end of the clamp shell, and the clamp is characterized in that: the clamp comprises a clamp shell and is characterized in that a bowl-shaped sound wave collecting piece is fixedly mounted on the upper surface of the clamp shell, a main transmission guide pillar is fixed at the center of the bottom of the sound wave collecting piece, the other end of the main transmission guide pillar is connected with a transmission plate, an auxiliary transmission guide pillar is uniformly connected to the periphery between the sound wave collecting piece and the transmission plate, and a plurality of clamping devices are symmetrically arranged on the periphery below the transmission plate. The permanent magnet, the electromagnet, the clamping plate and the guide connecting rod are convenient for quickly disassembling and taking out the mounted acoustic emission sensor, so that the acoustic emission sensor is convenient to overhaul, maintain or replace, and has excellent acoustic signal acquisition capacity; through setting up the gasbag body, effectively wrap up the acoustic emission sensor outer wall to realize sealed effect.
Description
Technical Field
The invention relates to the technical field of electric spark machining, in particular to a clamp for electric spark machining for an acoustic emission sensor.
Background
With the rapid development of socioeconomic, electric spark is a processing technology, mainly utilizes a discharge electrode (EDM electrode) with a specific geometric shape to burn the geometric shape of the electrode on a metal (conductive) component;
as a real-time dynamic monitoring technology, the reliability of attachment of a sensor and a monitored object is crucial to acquisition of acoustic emission data, and the effectiveness of monitoring is directly determined. Publication No. CN111390306 discloses a method for detecting the state of electric discharge machining, in the process of electric discharge machining, an acoustic emission sensor is fixed in a working solution or on a workbench, acoustic emission wave signals generated in the process of electric discharge are collected in real time, and the intensity and duration of the collected acoustic emission wave signals are calculated, but the fixing of the acoustic emission sensor becomes a great technical problem, on one hand, sealing is guaranteed, on the other hand, heat insulation is needed, and most importantly, the acoustic emission sensor cannot be in direct contact with the electric discharge machining liquid level, so that the conduction of the acoustic signals is wrong, and the detection data is inaccurate.
Therefore, the clamp for the electric spark machining for the acoustic emission sensor is provided to improve the detection precision and the installation and maintenance efficiency of the acoustic emission sensor in the electric spark machining.
Disclosure of Invention
The invention aims to provide a clamp for electric spark machining for an acoustic emission sensor, which is used for machining the acoustic emission sensor and solves the problems that the existing electric spark machining proposed in the background technology is installed in the clamp for acoustic emission, is sealed and protected, is inconvenient to take out when a fault occurs, is not beneficial to maintenance and the like.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an anchor clamps for spark-erosion machining for acoustic emission sensor for processing acoustic emission sensor, includes the anchor clamps casing, the bottom fixed mounting of anchor clamps casing has joint support pole, its characterized in that: the clamp comprises a clamp shell, a main transmission guide pillar, a transmission plate, an auxiliary transmission guide pillar, a clamping device and a clamping device, wherein the upper surface of the clamp shell is fixedly provided with a bowl-shaped sound wave collecting sheet, the center of the bottom of the sound wave collecting sheet is fixedly provided with the main transmission guide pillar, the other end of the main transmission guide pillar is connected with the transmission plate, one circle between the sound wave collecting sheet and the transmission plate is uniformly connected with the auxiliary transmission guide pillar, and the periphery below the;
the clamping device comprises a clamping plate and guide connecting rods, wherein a permanent magnet is fixed on the outer side of the clamping plate, a plurality of guide connecting rods are symmetrically fixed on the periphery of the clamping plate, the other ends of the guide connecting rods are embedded in a clamp shell, a compression spring is arranged between the clamping plate and the inner wall of the clamp shell through the guide connecting rods, and an electromagnet is fixed in the clamp shell in the direction of the other end of each guide connecting rod;
the conducting plate is connected with the bottom of the clamp shell through the air bag body, and the air bag body is arranged between the clamping plate and the acoustic emission sensor.
Preferably, the bottom of the clamp shell is provided with a mounting plate, and the outer ring of the mounting plate is provided with a sealing gasket.
Preferably, the periphery of the sound wave collecting sheet is fixed with the outer ring of the clamp shell.
Preferably, the profile of the clamping device is adapted to the outer dimensions of the acoustic emission sensor.
Preferably, the balloon body is made of a material with high strength and high toughness.
Preferably, the inflation body in the air sac body is inert gas.
Preferably, the main guide post, the auxiliary guide post and the conductive plate are made of materials with poor heat conductivity and good sound conductivity
Compared with the prior art, the invention has the beneficial effects that:
1. when the electromagnet is powered off, the clamping plate is pushed to the outer wall of the acoustic emission sensor under the action of the compression spring, so that the acoustic emission sensor is in a clamping state, the acoustic emission sensor is easily disassembled or clamped by the clamp, and the acoustic emission sensor is convenient to use;
2. according to the invention, the sound wave signals are effectively collected by the sound wave collecting piece, the sound emission wave signals generated in the electric spark discharging process collected by the sound wave collecting piece can be effectively conducted onto the conducting plate through the main conducting post and the auxiliary conducting post, and the conducting plate is effectively contacted with the sound emission sensor, so that the signals detected by the sound emission sensor are more accurate and effective;
3. the air bag body is extruded through the clamping plate, so that the acoustic emission sensor is clamped, the air bag body expands towards the periphery and is tightly attached to the periphery under the action of the clamping plate and the acoustic emission sensor, and the outer wall of the acoustic emission sensor is effectively coated, so that the sealing effect is realized;
4. the airbag body is extruded by the clamping plate, so that the airbag body at the bottom is expanded to support the bottom of the acoustic emission sensor, the conducting plate is pulled in the process that the clamping plate extrudes the airbag body, the conducting column and the acoustic wave collecting sheet are further tensioned by the conducting plate, the conducting efficiency and the collecting capacity of acoustic wave signals are improved, the conducting plate is effectively attached to the signal collecting surface of the acoustic emission sensor under the action of the airbag body, and the detection capacity is improved;
5. according to the acoustic emission sensor, the main transmission guide pillar, the auxiliary transmission guide pillar and the transmission plate are made of materials with poor heat conduction performance and good sound conduction performance, and the air bag body has good heat insulation performance, so that the acoustic emission sensor has a good heat insulation effect, and the detection performance of the acoustic emission sensor is prevented from being influenced when the temperature of working fluid is high.
Drawings
FIG. 1 is a schematic structural view of the present invention as a whole;
FIG. 2 is a schematic diagram of a cross-sectional structure of the present invention;
FIG. 3 is a schematic longitudinal sectional view of the present invention;
fig. 4 is a schematic view of a longitudinal sectional structure of the acoustic emission sensor according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1 to 4, the clamp for electrical discharge machining for an acoustic emission sensor of the present embodiment includes a clamp housing 1, a connecting support rod 2 is fixedly installed at the bottom end of the clamp housing 1, the support rod 2 fixes a clamp body in a working fluid or on a workbench, an installation plate 12 is installed at the bottom of the clamp housing 1, a sealing ring is arranged around the installation plate 12 when the acoustic emission sensor is installed on the installation plate 12, the installation opening is sealed, a bowl-shaped acoustic wave collecting plate 3 is fixedly installed on the upper surface of the clamp housing 1, the bowl-shaped acoustic wave collecting plate 3 faces the working surface direction of electrical discharge machining, the bowl-shaped acoustic wave collecting plate 3 facilitates the collection of acoustic wave signals, the periphery of the acoustic wave collecting plate 3 is fixed with the outer ring of the clamp housing 1, a main transmission guide pillar 4 is fixed at the center of the bottom of the acoustic wave collecting plate 3, and a transmission plate, a week evenly is connected with vice guide pillar 5 between piece 3 and the conduction board 6 is collected to the sound wave, through main guide pillar and vice guide pillar can be with the sound emission wave signal effectual conduction that the electric spark discharge process that the piece 3 was gathered was collected to the sound wave on the conduction board 6, conduction board 6 and acoustic emission sensor 13 effective contact for the signal that acoustic emission sensor 13 detected is more accurate effective.
A plurality of clamping devices are symmetrically arranged on the periphery below the conducting plate 6, each clamping device comprises a clamping plate 8 and a guide connecting rod 11, a permanent magnet 9 is fixed on the outer side of each clamping plate 8, a plurality of guide connecting rods 11 are symmetrically fixed on the periphery of each clamping plate 8, the other ends of the guide connecting rods 11 are embedded in the fixture shell 1, compression springs are arranged between the clamping plates 8 and the inner wall of the fixture shell 1 of each guide connecting rod 11, electromagnets 10 are fixed in the fixture shell 1 in the direction of the other ends of the guide connecting rods 11, sliding plates are fixed at the tail ends of the guide connecting rods 11, matched guide grooves are formed in the embedded parts of the guide connecting rods 11 in the fixture shell 1, the sliding plates can freely slide in the guide grooves, the distribution of the clamping devices is matched with the shape and size of the acoustic emission sensor 13, under the action of the compression springs, the clamping plates, when the acoustic emission sensor 13 needs to be disassembled, only the electromagnet 10 needs to be electrified, the electromagnet 10 attracts the permanent magnet 9, and then the clamping plate 8 is driven to be separated from the acoustic emission sensor 13, so that the acoustic emission sensor can be disassembled easily, and the acoustic emission sensor 13 is convenient to disassemble and assemble.
When the clamp is placed in the working solution, the sealing performance and the heat insulation performance are good, the detection of the acoustic emission sensor is prevented from being influenced, as shown in reference to fig. 3 and 4, the conducting plate is connected with the bottom of the clamp shell 1 through the air bag body 7, the air bag body 7 is arranged between the clamping plate 8 and the acoustic emission sensor 13, the air bag body 7 is filled with gas, the air bag body has higher strength and toughness, the acoustic emission sensor 13 is arranged in the clamp shell 1, when the electromagnet 10 is not electrified, the air bag body 7 is extruded by the clamping plate 8 in a circle under the action of the compression spring, the acoustic emission sensor 13 is clamped, the air bag body 7 is mutually attached to the periphery in an expansion manner under the action of the clamping plate 8 and the acoustic emission sensor 13, the outer wall of the acoustic emission sensor is effectively coated, the sealing effect is realized, meanwhile, the air bag body 7 at the bottom is, simultaneously splint 8 extrusion gasbag body 7 the in-process can stimulate conduction board 6, and then collects piece 3 through 6 taut conduction posts of conduction board and sound wave, improves the conduction efficiency and the collection ability of sound wave signal, carries out effectual laminating with conduction board 6 and acoustic emission sensor's signal acquisition face under the effect of gasbag body 7, improves the detection ability.
The main conduction post 4, the auxiliary conduction post 5 and the conduction plate 6 are made of materials with poor heat conduction performance and good sound conduction performance, the air bag body 7 is filled with gas, so that the heat insulation performance is better, if the heat insulation effect needs to be enhanced, inert gas can be filled into the air bag body 7, the acoustic emission sensor 13 is enabled to have better heat insulation effect, and the detection performance of the acoustic emission sensor 13 is prevented from being influenced when the temperature of the working fluid is higher.
The working principle is as follows: when the acoustic emission sensor is used, the electromagnet 10 is electrified, the electromagnet 10 attracts the permanent magnet 9, the clamping plate 8 matched with the acoustic emission sensor 13 in shape and size is pulled away from each other for a certain distance, the mounting base plate 12 is opened, the acoustic emission sensor 13 is arranged in the clamp and tightly attached to the conducting plate, then the electromagnet 10 is disconnected, the clamping plate 8 on one circle extrudes the air bag body 7 under the action of the compression spring, the acoustic emission sensor 13 is further clamped, the air bag body 7 expands towards the periphery and tightly attaches to each other under the action of the clamping plate 8 and the acoustic emission sensor 13, the outer wall of the acoustic emission sensor is effectively coated, the sealing effect is realized, meanwhile, the air bag body 7 on the bottom expands to support the bottom of the acoustic emission sensor 13, the conducting plate 6 can be pulled in the process that the air bag body 7 is extruded by the clamping plate 8, the conducting column and the acoustic wave collecting sheet 3 are tensioned through the, carry out effectual laminating with conduction board 6 and acoustic emission sensor's signal acquisition face under the effect of the gasbag body 7, improve the detection ability, main conduction post 4, vice conduction post 5 and conduction board 6 adopt the material that the thermal conductivity is poor, because gasbag body 7 is gassy, better heat-proof quality has, thereby make acoustic emission sensor 13 have better thermal-insulated effect, when avoiding the working solution temperature higher, influence acoustic emission sensor 13's detection performance, when needing to unpick and wash the maintenance, only need to energize electro-magnet 10, electro-magnet 10 actuation permanent magnet 9, and then drive splint 8 and break away from acoustic emission sensor 13, just can easily dismantle, make the dismantlement installation very convenient.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (7)
1. The utility model provides an anchor clamps for spark-erosion machining for acoustic emission sensor, includes anchor clamps casing (1), the bottom fixed mounting of anchor clamps casing (1) has joint support pole (2), its characterized in that: the clamp comprises a clamp shell (1), and is characterized in that a bowl-shaped sound wave collecting piece (3) is fixedly arranged on the upper surface of the clamp shell (1), a main transmission guide post (4) is fixed at the center of the bottom of the sound wave collecting piece (3), the other end of the main transmission guide post (4) is connected with a transmission plate (6), an auxiliary transmission guide post (5) is uniformly connected to the periphery between the sound wave collecting piece (3) and the transmission plate (6), and a plurality of clamping devices are symmetrically arranged on the periphery below the transmission plate (6);
the clamping device comprises a clamping plate (8) and guide connecting rods (11), permanent magnets (9) are fixed on the outer side of the clamping plate (8), a plurality of guide connecting rods (11) are symmetrically fixed on the periphery of the clamping plate (8), the other ends of the guide connecting rods (11) are embedded into the clamp shell (1), compression springs are arranged between the clamping plate (8) and the inner wall of the clamp shell (1) of the guide connecting rods (11), and electromagnets (10) are fixed in the clamp shell (1) in the direction of the other ends of the guide connecting rods (11);
the conducting plate is connected with the bottom of the clamp shell (1) through the air bag body (7), the air bag body (7) is arranged between the clamping plate (8) and the acoustic emission sensor (13), and the air bag body (7) is filled with gas.
2. The electric discharge machining jig for an acoustic emission sensor according to claim 1, characterized in that: the bottom of anchor clamps casing 1 is provided with mounting panel (12), just mounting panel (12) outer lane is provided with sealed the pad.
3. The electric discharge machining jig for an acoustic emission sensor according to claim 1, characterized in that: the periphery of the sound wave collecting sheet (3) is fixed with the outer ring of the clamp shell (1).
4. The electric discharge machining jig for an acoustic emission sensor according to claim 1, characterized in that: the distribution of the clamping device is matched with the external dimension of the acoustic emission sensor.
5. The electric discharge machining jig for an acoustic emission sensor according to claim 1, characterized in that: the air bag body (7) is made of a material with high strength and high toughness.
6. An electric discharge machining jig for an acoustic emission sensor according to claim 5, characterized in that: the gas filled in the air sac body (7) is inert gas.
7. An electric discharge machining jig for an acoustic emission sensor according to claim 5, characterized in that: the main transmission guide post (4), the auxiliary transmission guide post (5) and the transmission plate (6) are made of materials with poor heat conduction performance and good sound conduction performance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110001654.6A CN112692388B (en) | 2021-01-04 | 2021-01-04 | Electric spark machining fixture for acoustic emission sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110001654.6A CN112692388B (en) | 2021-01-04 | 2021-01-04 | Electric spark machining fixture for acoustic emission sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112692388A true CN112692388A (en) | 2021-04-23 |
| CN112692388B CN112692388B (en) | 2022-10-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110001654.6A Active CN112692388B (en) | 2021-01-04 | 2021-01-04 | Electric spark machining fixture for acoustic emission sensor |
Country Status (1)
| Country | Link |
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| CN (1) | CN112692388B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114367710A (en) * | 2022-02-22 | 2022-04-19 | 广州大学 | Electric spark machining control method based on deep learning and acoustic emission signals |
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| JPH0584630A (en) * | 1991-09-25 | 1993-04-06 | Kanetetsuku Kk | Mounting device for magnetic chuck |
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| CN206567887U (en) * | 2017-03-10 | 2017-10-20 | 宿迁学院 | A kind of electromagnet fixing device |
| CN107782793A (en) * | 2016-08-25 | 2018-03-09 | 波音公司 | Acoustic emission sensor retainer |
| CN208417954U (en) * | 2018-06-21 | 2019-01-22 | 郑州新锐石油工程技术有限公司 | A kind of pressure sealing sealing clamp |
| CN109570668A (en) * | 2019-01-24 | 2019-04-05 | 安徽理工大学 | A kind of electric spark Compound Machining processing groove |
| CN210607365U (en) * | 2019-09-27 | 2020-05-22 | 郑州大学 | Lithium cell shock attenuation protection device that insulates against heat |
| CN111390306A (en) * | 2020-04-22 | 2020-07-10 | 东北林业大学 | Electric spark machining state detection method based on acoustic emission technology |
| CN211168193U (en) * | 2019-08-08 | 2020-08-04 | 浙江桐化化工有限公司 | Water-reducing agent mother liquor that can recycle is with storing bucket |
-
2021
- 2021-01-04 CN CN202110001654.6A patent/CN112692388B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0584630A (en) * | 1991-09-25 | 1993-04-06 | Kanetetsuku Kk | Mounting device for magnetic chuck |
| CN204785296U (en) * | 2015-07-16 | 2015-11-18 | 北京市自来水集团禹通市政工程有限公司 | Shutoff gasbag |
| CN107782793A (en) * | 2016-08-25 | 2018-03-09 | 波音公司 | Acoustic emission sensor retainer |
| CN206567887U (en) * | 2017-03-10 | 2017-10-20 | 宿迁学院 | A kind of electromagnet fixing device |
| CN208417954U (en) * | 2018-06-21 | 2019-01-22 | 郑州新锐石油工程技术有限公司 | A kind of pressure sealing sealing clamp |
| CN109570668A (en) * | 2019-01-24 | 2019-04-05 | 安徽理工大学 | A kind of electric spark Compound Machining processing groove |
| CN211168193U (en) * | 2019-08-08 | 2020-08-04 | 浙江桐化化工有限公司 | Water-reducing agent mother liquor that can recycle is with storing bucket |
| CN210607365U (en) * | 2019-09-27 | 2020-05-22 | 郑州大学 | Lithium cell shock attenuation protection device that insulates against heat |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114367710A (en) * | 2022-02-22 | 2022-04-19 | 广州大学 | Electric spark machining control method based on deep learning and acoustic emission signals |
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|---|---|
| CN112692388B (en) | 2022-10-25 |
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Effective date of registration: 20230614 Address after: 710000 Free Trade Xintiandi Chuangxing Society C0294, No. 2196, Fengdong Avenue (East Section), Fengdong New Town, Xi'an, Shaanxi Patentee after: Xi'an Chitaifeng Trading Co.,Ltd. Address before: 710072 4th floor, family building, No.15, East District, Northwest University of technology, 127 Youyi West Road, Beilin District, Xi'an City, Shaanxi Province Patentee before: Zhang Xiaomin |
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