CN104338970A - Drilling jig for machining six-edge steel nut threaded holes and machining method of six-edge steel nut threaded holes based on drilling jig - Google Patents
Drilling jig for machining six-edge steel nut threaded holes and machining method of six-edge steel nut threaded holes based on drilling jig Download PDFInfo
- Publication number
- CN104338970A CN104338970A CN201410605975.7A CN201410605975A CN104338970A CN 104338970 A CN104338970 A CN 104338970A CN 201410605975 A CN201410605975 A CN 201410605975A CN 104338970 A CN104338970 A CN 104338970A
- Authority
- CN
- China
- Prior art keywords
- ratchet
- drill jig
- disc
- steel nut
- quiet
- 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
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 47
- 239000010959 steel Substances 0.000 title claims abstract description 47
- 238000005553 drilling Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000003754 machining Methods 0.000 title abstract description 7
- 238000007514 turning Methods 0.000 claims description 17
- 230000004807 localization Effects 0.000 claims description 6
- 238000003672 processing method Methods 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000003068 static effect Effects 0.000 abstract 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B47/00—Constructional features of components specially designed for boring or drilling machines; Accessories therefor
- B23B47/28—Drill jigs for workpieces
Abstract
The invention discloses a drilling jig for machining six-edge steel nut threaded holes and a machining method of the six-edge steel nut threaded holes based on the drilling jig. A plurality of drilling jig stand columns in a drilling toll are fixedly connected with a position between a drilling jig bottom plate and a drilling jig static disc; the drilling jig static disc is welded with a static disc center sleeve; a cylindrical hole is formed in the sleeve; the center of a ratchet disc is welded with a dynamic disc rotating shaft; the dynamic disc rotating shaft can be rotationally installed in the cylindrical hole; eight six-edge holes which serve as through holes are formed in the ratchet disc; eight teeth are also uniformly distributed on the ratchet disc; an emptying hole is formed in the drilling jig static disc; the height of a cap between the bottom surface of the ratchet disc and the top surface of the drilling jig static disc is smaller than that of a six-edge steel nut; a pawl rotating shaft in a disc positioning part is fixedly installed on the drilling jig static disc; one end of a pawl sleeves the pawl rotating shaft, and the other end thereof is matched with the teeth on the ratchet disc; one end of a spring sleeves the pawl rotating shaft, and the other end thereof sleeves a spring connecting shaft; the spring connecting shaft is fixed on the pawl. The drilling jig can improve the machining efficiency and reduce the labor intensity.
Description
Technical field
The processing method that the present invention relates to a kind of drill jig and utilize drill jig to implement, specifically a kind of for processing the drill jig in six-edged steel nut thread hole and the processing method based on this drill jig.
Background technology
Use six-edged steel nut in a large number in shot-blast apparatus, bolt head is not overhanging from nut end, and shot is thrown and beaten on nut surface, bolt head nut interior beat less than, namely nut inner hole is tapped blind hole, and during replacing liner plate, the screw thread of bolt and nut easily unclamps.
The hole processing of current six-edged steel nut is on drilling machine substantially, adopt plain clamp boring, tapping, because six-edged steel nut size is little, labor strength is large, production efficiency is low, and six-edged steel nut demand is large in addition, needs a lot of workman's processing, floor space is large, and production cost increases.
Summary of the invention
In order to overcome the shortcoming that above-mentioned prior art exists, the object of the present invention is to provide a kind of drill jig processing six-edged steel nut thread hole, this drill jig can improve the working (machining) efficiency of six-edged steel nut on drilling machine, reduces labour intensity.
The drill jig in this kind of processing six-edged steel nut thread hole, comprises drill jig base portion, disk rotational part and disk localization part;
Described drill jig base portion comprises drill jig base plate, many drill jig columns, the quiet disk of drill jig, quiet disc centre covers; Every root drill jig column bottom is provided with lower shaft portion, and this lower shaft portion is connected with the through hole interference of drill jig base plate; Drill jig column top arranges axle portion, and on this, axle portion is connected with the jack interference on the quiet disk of drill jig; Many drill jig columns are around the axis circumferentially uniform setting of the quiet disk of drill jig; The quiet disc centre of drill jig is welded with quiet disc centre cover, and the center of quiet disc centre cover has the cylindrical hole overlapping coaxial line with quiet disc centre;
Described disk rotational part comprises ratchet disc, dynamic disk rotational axle; Dynamic disk rotational axle described in ratchet disc center weld, dynamic disk rotational axle can in the cylindrical hole being assemblied in quiet disc centre cover of rotation; On ratchet disc the axis of moving disk rotational axle be evenly distributed with eight can the six rib holes of loading six-edged steel nut in gap, six rib holes are through hole; On described ratchet disc, also the axis of moving disk rotational axle is uniform arranges eight for snapping in the tooth of ratchet;
The quiet disk of drill jig is provided with one for falling the piece bores that falls of six-edged steel nut; Gap between the end face of the bottom surface of ratchet disc and the quiet disk of drill jig is less than the height of processed six-edged steel nut;
Described disk localization part comprises ratchet, ratchet turning cylinder, spring, spring connecting axle; Ratchet turning cylinder is packed on the ratchet turning cylinder connecting hole of the quiet disk of drill jig, and one end of ratchet is sleeved on ratchet turning cylinder, and the other end of ratchet is toothed portion and forms ratchet driving with the tooth contact on ratchet disc; One end of described spring is enclosed within described ratchet turning cylinder, and the other end of spring is enclosed within spring connecting axle, and described spring connecting axle is fixed on one end place ratchet being arranged toothed portion.
As the further technical scheme of this drill jig, described drill jig column is provided with three, and three drill jig columns are around the uniform circumferentially uniform setting of axis of the quiet disk of drill jig.
As the further technical scheme of this drill jig, ratchet disc excircle is connected with three handwheel connecting rods, the other end of three handwheel connecting rods is connected with the handwheel of annular round steel formation.
As the further technical scheme of this drill jig, the piece bores that falls on the quiet disk of drill jig is also six rib holes.
Present invention also offers the processing method based on above-mentioned drill jig, comprise the steps:
Ratchet disc rotates clockwise, and makes the teeth portion position of ratchet snap in the tooth of ratchet disc; Make ratchet withstand ratchet disc to make it to rotate counterclockwise;
The descending hole rotated counterclockwise on drilling six-edged steel nut of drill bit on drilling machine;
When ratchet disc rotates clockwise, the six-edged steel nut above piece bores that the quiet disk of arrival drill jig falls falls through the piece bores that falls automatically; Simultaneously manually six-edged steel nut to be processed is put into six rib holes after the piece bores position that falls falls part;
After drill bit processes the six-edged steel nut in six rib holes, then rotate clockwise the 450 six-edged steel nuts that can carry out in next six rib holes.
The invention has the beneficial effects as follows: drill jig has reinforced station, boring station and blanking station, manual rotation's ratchet disc, and click is located.This Drilling Jig Structure is simple, and rotate flexibly, accurate positioning, prevents the reversion of rotating disk and processing parts, and the machining accuracy of part improves, and production cost is low, and production efficiency is high.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is described further:
Fig. 1 is the structural representation of drill jig embodiment in the present invention;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is middle disk rotational part-structure figure embodiment illustrated in fig. 1;
Fig. 4 is the B-B sectional view of Fig. 3;
Fig. 5 is the quiet integrated disc portions structure chart of middle drill jig embodiment illustrated in fig. 1;
Fig. 6 is the C-C sectional view of Fig. 5;
In figure: 1 drill jig base plate; 2 drill jig columns; The quiet disk of 3 drill jig; 4 quiet disc centre covers; 41 cylindrical holes, 5 dynamic disk rotational axles; 6 ratchet discs; 61 teeth, 7 six rib holes; 8 handwheel connecting rods; 9 handwheels; 10 ratchets; 11 ratchet turning cylinders; 12 springs; 13 spring connecting axles; The 14 quiet disc centre holes of drill jig; 15 drill jig column connecting holes; 16 fall piece bores; 17 ratchet turning cylinder connecting holes.
Detailed description of the invention
As shown in figures 1 to 6, the drill jig in this kind of processing six-edged steel nut thread hole, comprises drill jig base portion, disk rotational part and disk localization part.
Described drill jig base portion comprises drill jig base plate 1, many drill jig columns 2, the quiet disk of drill jig 3, quiet disc centre covers 4.Every root drill jig column 2 bottom is provided with lower shaft portion, and this lower shaft portion is connected with the through hole interference of drill jig base plate 1; Drill jig column 2 top arranges axle portion, and on this, axle portion is connected with the jack interference on the quiet disk 3 of drill jig.Many drill jig columns 2 are around the axis circumferentially uniform setting of the quiet disk of drill jig 3.As the further technical scheme of this drill jig, described drill jig column 2 is provided with three, and three drill jig columns, around the axis circumferentially uniform setting of the quiet disk of drill jig 3, support solid and reliable and are conducive to falling part.
Drill jig quiet disk 3 center weld has quiet disc centre to overlap 4, and the center of quiet disc centre cover 4 has the cylindrical hole 41 overlapping coaxial line with quiet disc centre.
Described disk rotational part comprises ratchet disc 6, dynamic disk rotational axle 5.Dynamic disk rotational axle 5 described in ratchet disc 6 center weld, dynamic disk rotational axle 5 can in the cylindrical hole 41 being assemblied in quiet disc centre cover of rotation.On ratchet disc 6, the axis of moving disk rotational axle 5 is evenly distributed with eight can the six rib holes, rib hole 7, six 7 of loading six-edged steel nut in gap be through hole.On described ratchet disc 6, also the axis of moving disk rotational axle 5 is uniform arranges eight for snapping in the tooth 61 of ratchet.
The quiet disk 3 of drill jig is provided with one for falling the piece bores 16 that falls of six-edged steel nut.As the further technical scheme of this drill jig, the piece bores 16 that falls on the quiet disk of drill jig also can be six rib holes.
Gap between the end face of the bottom surface of ratchet disc 6 and the quiet disk of drill jig 3 is less than the height of processed six-edged steel nut.
Described disk localization part comprises ratchet 10, ratchet turning cylinder 11, spring 12, spring connecting axle 13.Ratchet turning cylinder 11 is packed on the ratchet turning cylinder connecting hole 17 of the quiet disk 3 of drill jig, and one end of ratchet 10 is sleeved on ratchet turning cylinder 11, and the other end of ratchet 10 is toothed portion and contacts with the tooth 61 on ratchet disc 6 to form ratchet driving.One end of described spring 12 is enclosed within ratchet turning cylinder 11, and the other end of spring 12 is enclosed within spring connecting axle 13, and spring connecting axle 13 is fixed on one end place ratchet 10 being arranged toothed portion.
Based on the processing method of above-mentioned drill jig, comprise the steps:
Ratchet disc 6 rotates clockwise, and makes the teeth portion position of ratchet 10 snap in the tooth 61 of ratchet disc 6; Making ratchet 10 withstand ratchet disc 6 makes ratchet disc 6 not rotate counterclockwise;
Hole on the descending six-edged steel nut rotated counterclockwise in drilling six rib holes of drill bit on drilling machine; Because ratchet withstands ratchet disc 6, so ratchet disc 6 can not rotate counterclockwise in boring procedure;
After drill bit processes the six-edged steel nut in six rib holes, then rotate clockwise the 450 six-edged steel nuts that can carry out in next six rib holes;
When ratchet disc 6 rotates clockwise, the six-edged steel nut above piece bores 16 that the quiet disk of arrival drill jig falls falls through the piece bores 16 that falls automatically; Simultaneously manually six-edged steel nut to be processed is put into six rib holes after piece bores 16 position that falls falls part.
As the further technical scheme of this drill jig, ratchet disc excircle is connected with three handwheel connecting rods, the other end of three handwheel connecting rods is connected with the handwheel of annular round steel formation.Can rotating ratchet disk 6 more easily.
Claims (5)
1. process the drill jig in six-edged steel nut thread hole, it is characterized in that: comprise drill jig base portion, disk rotational part and disk localization part;
Described drill jig base portion comprises drill jig base plate, many drill jig columns, the quiet disk of drill jig, quiet disc centre covers; Every root drill jig column bottom is provided with lower shaft portion, and this lower shaft portion is connected with the through hole interference of drill jig base plate; Drill jig column top arranges axle portion, and on this, axle portion is connected with the jack interference on the quiet disk of drill jig; Many drill jig columns are around the axis circumferentially uniform setting of the quiet disk of drill jig; The quiet disc centre of drill jig is welded with quiet disc centre cover, and the center of quiet disc centre cover has the cylindrical hole overlapping coaxial line with quiet disc centre;
Described disk rotational part comprises ratchet disc, dynamic disk rotational axle; Dynamic disk rotational axle described in ratchet disc center weld, dynamic disk rotational axle can in the cylindrical hole being assemblied in quiet disc centre cover of rotation; On ratchet disc the axis of moving disk rotational axle be evenly distributed with eight can the six rib holes of loading six-edged steel nut in gap, six rib holes are through hole; On described ratchet disc, also the axis of moving disk rotational axle is uniform arranges eight for snapping in the tooth of ratchet;
The quiet disk of drill jig is provided with one for falling the piece bores that falls of six-edged steel nut; Gap between the end face of the bottom surface of ratchet disc and the quiet disk of drill jig is less than the height of processed six-edged steel nut;
Described disk localization part comprises ratchet, ratchet turning cylinder, spring, spring connecting axle; Ratchet turning cylinder is packed on the ratchet turning cylinder connecting hole of the quiet disk of drill jig, and one end of ratchet is sleeved on ratchet turning cylinder, and the other end of ratchet is toothed portion and forms ratchet driving with the tooth contact on ratchet disc; One end of described spring is enclosed within described ratchet turning cylinder, and the other end of spring is enclosed within spring connecting axle, and described spring connecting axle is fixed on one end place ratchet being arranged toothed portion.
2. a kind of drill jig processing six-edged steel nut thread hole according to claim 1, is characterized in that: described drill jig column is provided with three, and three drill jig columns are around the uniform circumferentially uniform setting of axis of the quiet disk of drill jig.
3. a kind of drill jig processing six-edged steel nut thread hole according to claim 1, is characterized in that: on ratchet disc excircle, be connected with three handwheel connecting rods, and the other end of three handwheel connecting rods is connected with the handwheel of annular round steel formation.
4. a kind of drill jig processing six-edged steel nut thread hole according to claim 1, is characterized in that: the piece bores that falls on the quiet disk of drill jig is also six rib holes.
5., based on the processing method of the drill jig in a kind of processing according to claim 1 six prism steel nut thread holes, it is characterized in that, comprise the steps:
Ratchet disc rotates clockwise, and makes the teeth portion position of ratchet snap in the tooth of ratchet disc; Make ratchet withstand ratchet disc to make it to rotate counterclockwise;
The descending hole rotated counterclockwise on drilling six-edged steel nut of drill bit on drilling machine;
When ratchet disc rotates clockwise, the six-edged steel nut above piece bores that the quiet disk of arrival drill jig falls falls through the piece bores that falls automatically; Simultaneously manually six-edged steel nut to be processed is put into six rib holes after the piece bores position that falls falls part;
After drill bit processes the six-edged steel nut in six rib holes, then rotate clockwise 45 ° of six-edged steel nuts that can carry out in next six rib holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410605975.7A CN104338970B (en) | 2014-10-31 | 2014-10-31 | Drilling jig for machining six-edge steel nut threaded holes and machining method of six-edge steel nut threaded holes based on drilling jig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410605975.7A CN104338970B (en) | 2014-10-31 | 2014-10-31 | Drilling jig for machining six-edge steel nut threaded holes and machining method of six-edge steel nut threaded holes based on drilling jig |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104338970A true CN104338970A (en) | 2015-02-11 |
| CN104338970B CN104338970B (en) | 2017-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410605975.7A Active CN104338970B (en) | 2014-10-31 | 2014-10-31 | Drilling jig for machining six-edge steel nut threaded holes and machining method of six-edge steel nut threaded holes based on drilling jig |
Country Status (1)
| Country | Link |
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| CN (1) | CN104338970B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104772503A (en) * | 2015-04-29 | 2015-07-15 | 利欧集团股份有限公司 | Ratchet and pawl indexing drill jig |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109014339B (en) * | 2018-08-17 | 2019-07-16 | 山东丰拓机械有限公司 | It is a kind of can distortion preventing punching assist clamping plate |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB106308A (en) * | 1916-05-15 | 1917-05-15 | James John Walker | Improvements in and relating to Jigs for use in Drilling and Boring Operations. |
| CN202701821U (en) * | 2012-06-11 | 2013-01-30 | 海盐双赢管件制造有限公司 | Nut fixing device |
| CN202804674U (en) * | 2012-07-12 | 2013-03-20 | 安徽青阳县雄伟泵阀制造有限公司 | Rotary multi-hole drilling fixture |
| CN103659386A (en) * | 2013-12-15 | 2014-03-26 | 重庆智锐德科技有限公司 | Rotation-prevention intermittent angle adjusting collet chuck |
| CN203887604U (en) * | 2014-04-04 | 2014-10-22 | 昆山联承精密机械有限公司 | Automatic-feed circular shaft drilling device |
| CN204182981U (en) * | 2014-10-31 | 2015-03-04 | 山东开泰抛丸机械有限公司 | A kind of drill jig processing six-edged steel nut thread hole |
-
2014
- 2014-10-31 CN CN201410605975.7A patent/CN104338970B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB106308A (en) * | 1916-05-15 | 1917-05-15 | James John Walker | Improvements in and relating to Jigs for use in Drilling and Boring Operations. |
| CN202701821U (en) * | 2012-06-11 | 2013-01-30 | 海盐双赢管件制造有限公司 | Nut fixing device |
| CN202804674U (en) * | 2012-07-12 | 2013-03-20 | 安徽青阳县雄伟泵阀制造有限公司 | Rotary multi-hole drilling fixture |
| CN103659386A (en) * | 2013-12-15 | 2014-03-26 | 重庆智锐德科技有限公司 | Rotation-prevention intermittent angle adjusting collet chuck |
| CN203887604U (en) * | 2014-04-04 | 2014-10-22 | 昆山联承精密机械有限公司 | Automatic-feed circular shaft drilling device |
| CN204182981U (en) * | 2014-10-31 | 2015-03-04 | 山东开泰抛丸机械有限公司 | A kind of drill jig processing six-edged steel nut thread hole |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104772503A (en) * | 2015-04-29 | 2015-07-15 | 利欧集团股份有限公司 | Ratchet and pawl indexing drill jig |
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| Publication number | Publication date |
|---|---|
| CN104338970B (en) | 2017-01-11 |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 256217 Qingyang, Shandong, Zouping Town, Binzhou Applicant after: SHANDONG KAITAI SHOT BLASTING MACHINERY SHARE Co.,Ltd. Applicant after: Shandong Kaitai Industrial Technology Co.,Ltd. Address before: 256217 Qingyang, Shandong, Zouping Town, Binzhou Applicant before: SHANDONG KAITAI SHOT-BLASTING MACHINERY Co.,Ltd. Applicant before: Shandong Kaitai Industrial Technology Co.,Ltd. |
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| COR | Change of bibliographic data | ||
| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20171110 Address after: Kai Tai Road Qingyang town 256217 Shandong city of Binzhou province Zouping County No. 1 Patentee after: SHANDONG KAITAI SHOT BLASTING MACHINERY SHARE Co.,Ltd. Address before: 256217 Qingyang, Shandong, Zouping Town, Binzhou Co-patentee before: Shandong Kaitai Industrial Technology Co.,Ltd. Patentee before: SHANDONG KAITAI SHOT BLASTING MACHINERY SHARE Co.,Ltd. |
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| TR01 | Transfer of patent right |
Effective date of registration: 20200131 Address after: The town of Qingyang city of Binzhou province Zouping 256217 Shandong County Phoenix Park on the south side of Shou Ji Patentee after: Shandong Kaitai metal abrasive Co.,Ltd. Address before: Kai Tai Road Qingyang town 256217 Shandong city of Binzhou province Zouping County No. 1 Patentee before: SHANDONG KAITAI SHOT BLASTING MACHINERY SHARE Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Drilling jig for machining six-edge steel nut threaded holes and machining method of six-edge steel nut threaded holes based on drilling jig Effective date of registration: 20200326 Granted publication date: 20170111 Pledgee: Dongying Bank Co.,Ltd. Binzhou Zouping Branch Pledgor: Shandong Kaitai metal abrasive Co.,Ltd. Registration number: Y2020980001038 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20220217 Granted publication date: 20170111 Pledgee: Dongying Bank Co.,Ltd. Binzhou Zouping Branch Pledgor: Shandong Kaitai metal abrasive Co.,Ltd. Registration number: Y2020980001038 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A drilling die for machining threaded holes of hexagonal steel nuts and a machining method based on the drilling die Effective date of registration: 20220307 Granted publication date: 20170111 Pledgee: Dongying Bank Co.,Ltd. Binzhou Zouping Branch Pledgor: Shandong Kaitai metal abrasive Co.,Ltd. Registration number: Y2022980002156 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20220926 Granted publication date: 20170111 Pledgee: Dongying Bank Co.,Ltd. Binzhou Zouping Branch Pledgor: Shandong Kaitai metal abrasive Co.,Ltd. Registration number: Y2022980002156 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A drilling jig for machining threaded holes of hexagonal steel nuts and a processing method based on the drilling jig Effective date of registration: 20220927 Granted publication date: 20170111 Pledgee: Dongying Bank Co.,Ltd. Binzhou Zouping Branch Pledgor: Shandong Kaitai metal abrasive Co.,Ltd. Registration number: Y2022980016286 |