CN215092961U - Grinding wheel dressing device - Google Patents
Grinding wheel dressing device Download PDFInfo
- Publication number
- CN215092961U CN215092961U CN202023231229.6U CN202023231229U CN215092961U CN 215092961 U CN215092961 U CN 215092961U CN 202023231229 U CN202023231229 U CN 202023231229U CN 215092961 U CN215092961 U CN 215092961U
- Authority
- CN
- China
- Prior art keywords
- grinding wheel
- wheel
- profiling
- grinding
- knife
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000227 grinding Methods 0.000 title claims abstract description 170
- 239000004576 sand Substances 0.000 claims abstract description 36
- 238000003754 machining Methods 0.000 claims abstract description 5
- 238000005498 polishing Methods 0.000 claims description 14
- 238000009966 trimming Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Images
Abstract
A grinding wheel dressing device is used for dressing a grinding wheel and comprises a supporting seat, a cutter dressing pen, a bearing frame, a cutter and a profiling mechanism, wherein the cutter dressing pen is fixed on the supporting seat and used for machining a grinding profile on the grinding wheel; the bearing frame is connected with the supporting seat, and two ends of the bearing frame protrude out of the supporting seat; the cutter is connected with the first end of the bearing frame and used for finishing the grinding profile machined on the grinding wheel and removing floating sand attached to the surface of the grinding wheel; the profiling mechanism is connected with the second end of the bearing frame and provided with an arc-shaped profiling surface, the radian of the profiling surface is the same as that of the surface profile of a target finished product to be processed by the grinding wheel, and floating sand attached to the surface of the grinding wheel is further removed, so that the grinding wheel can obtain a polished surface matched with the target finished product. The grinding wheel dressing device effectively removes floating sand and improves dressing efficiency.
Description
Technical Field
The application relates to the technical field of metal processing, in particular to a grinding wheel dressing device.
Background
During the long-time grinding process of the grinding wheel, abrasive particles on the working surface of the grinding wheel are gradually dull due to the action of the grinding force and the grinding temperature. The dull grinding wheel will affect the surface quality and geometric accuracy of the workpiece to be ground. Thus, the grinding wheel requires periodic dressing over time. The prior grinding wheel dressing device generally has the following problems: 1. the grinding wheel is repaired through a single repairing tool pen point, so that the dressing efficiency is low; 2. floating sand exists on the surface of the grinding wheel trimmed by the conventional grinding wheel trimming device, the surface of the grinding wheel needs to be manually brushed off by a toothbrush, the floating sand removing effect is poor, and the efficiency is low; 3. after finishing, the grinding wheel can fall sand during initial operation, so that the size of the processed material is larger, and the processing precision is low.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is desirable to provide a grinding wheel dressing device to solve the above problems.
The embodiment of the application provides a grinding wheel dressing device, which is used for dressing a grinding wheel and comprises a supporting seat, a knife repairing pen, a bearing frame, a knife piece and a profiling mechanism, wherein the knife repairing pen is fixed on the supporting seat and used for processing a grinding profile on the grinding wheel; the bearing frame is connected with the supporting seat, and two ends of the bearing frame protrude out of the supporting seat; the cutter is connected with the first end of the bearing frame and used for finishing the grinding profile machined on the grinding wheel and removing floating sand attached to the surface of the grinding wheel; the profiling mechanism is connected with the second end of the bearing frame and provided with an arc-shaped profiling surface, the radian of the profiling surface is the same as that of the surface profile of a target finished product to be processed by the grinding wheel, and floating sand attached to the surface of the grinding wheel is further removed, so that the grinding wheel can obtain a polished surface matched with the target finished product.
Further, in some embodiments of the present application, the first end of the carrier is provided with a first mounting slot, the first mounting slot is provided with a first opening, the insert is mounted in the first mounting slot, and a portion of the insert is located outside the first opening.
Further, in some embodiments of the present application, the second end of the carrier is provided with a second mounting groove, the second mounting groove is provided with a second opening, the copying mechanism is mounted in the second mounting groove, and the copying surface is located outside the second opening.
Further, in some embodiments of the present application, the insert is a spherical insert.
Further, in some embodiments of the present application, the grinding wheel dressing device further includes a moving mechanism and a control mechanism, the grinding wheel is rotatably mounted on the moving mechanism, and the moving mechanism is configured to drive the grinding wheel to move relative to the dressing tool pen, the knife and the profiling mechanism respectively under the control of the control mechanism.
Further, in some embodiments of the present application, the moving mechanism is further configured to sequentially drive the grinding wheel to contact the sharpening pen, the knife and the profiling surface under the control of the control mechanism.
Further, in some embodiments of the present application, the sharpening pen is configured to machine a grinding profile around the grinding wheel when the control mechanism controls the moving mechanism to drive the grinding wheel to contact with the sharpening pen.
Further, in some embodiments of the present application, the knife is configured to trim the grinding profile into a grinding surface and remove floating sand attached to the grinding surface when the control mechanism controls the moving mechanism to drive the grinding wheel to contact with the knife.
Further, in some embodiments of the present application, the profiling surface is configured to contact the polishing surface and further remove floating sand attached to the polishing surface when the control mechanism controls the moving mechanism to drive the grinding wheel to contact the profiling surface, so that the polishing surface is adapted to the finished product.
Further, in some embodiments of the present application, the moving mechanism is further configured to sequentially drive the grinding wheel to rotate clockwise and counterclockwise when the control mechanism controls the moving mechanism to drive the grinding wheel to contact with the profiling surface.
In the grinding wheel dressing device, the grinding profile and floating sand attached to the surface of the grinding wheel are sequentially machined on the grinding wheel through the matching of the knife dressing pen, the knife piece and the profiling mechanism, the grinding wheel is enabled to obtain a grinding surface matched with the target finished product, floating sand is effectively removed, and dressing efficiency is improved.
Drawings
Fig. 1 is a schematic structural diagram of a grinding wheel dressing device according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of a support base in an embodiment of the present application.
Fig. 3 is a schematic structural diagram of a carrier in an embodiment of the present application.
Description of the main elements
Grinding wheel dressing apparatus 100
Reinforcing part 11
Knife repairing pen 20
Edge surface 21
Edge 22
The carrier 30
First opening 311
Knife 40
Copying surface 51
Grinding wheel 90
The following detailed description will further illustrate the present application in conjunction with the above-described figures.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.
It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.
The embodiment of the application provides a grinding wheel dressing device, which is used for dressing a grinding wheel and comprises a supporting seat, a cutter repairing pen, a bearing frame, a cutter and a profiling mechanism, wherein the cutter repairing pen is fixed on the supporting seat and used for processing a grinding profile on the grinding wheel; the bearing frame is connected with the supporting seat, and two ends of the bearing frame protrude out of the supporting seat; the cutter is connected with the first end of the bearing frame and used for finishing the grinding profile processed on the grinding wheel and removing floating sand attached to the surface of the grinding wheel; the profiling mechanism is connected with the second end of the bearing frame and provided with an arc-shaped profiling surface, the radian of the profiling surface is the same as that of the surface profile of a target finished product to be processed by the grinding wheel, and floating sand attached to the surface of the grinding wheel is further removed so that the grinding wheel can obtain a polished surface matched with the target finished product.
In the grinding wheel dressing device, the grinding profile is processed on the grinding wheel in sequence through the matching of the knife dressing pen, the knife piece and the profiling mechanism, floating sand attached to the surface of the grinding wheel is removed, the grinding wheel is enabled to obtain a grinding surface matched with a target finished product, the floating sand is effectively removed, and the dressing efficiency is improved.
Some embodiments of the present application will be described in detail below with reference to the accompanying drawings.
Referring to FIG. 1, the present application provides a wheel truing apparatus 100 for truing a grinding wheel 90. The wheel dresser apparatus 100 includes a support base 10, a dresser pencil 20, a carriage 30, a knife 40, and a profiling mechanism 50. The sharpening pen 20 is fixed on the support base 10 and is used for machining a grinding profile on the grinding wheel 90. The carriage 30 is connected to the support seat 10. The cutter 40 is connected to one end of the carrier 30, and is used for finishing the grinding profile machined on the grinding wheel 90 and removing floating sand attached to the surface of the grinding wheel 90; the profiling mechanism 50 is connected to the other end of the carrier 30 for further removing floating sand attached to the surface of the grinding wheel 90 to make the grinding wheel 90 obtain a polished surface adapted to the target finished product.
In the grinding wheel dressing device 100, the dressing pen 20, the cutter 40 and the profiling mechanism 50 are matched to sequentially process a grinding profile on the grinding wheel 90, remove floating sand attached to the surface of the grinding wheel 90, and enable the grinding wheel 90 to obtain a grinding surface matched with a target finished product, thereby effectively removing floating sand and improving dressing efficiency.
In one embodiment, the grinding wheel truing device 100 further includes a moving mechanism 60 and a control mechanism (not shown), the grinding wheel 90 is rotatably mounted on the moving mechanism 60, and the moving mechanism 60 is configured to drive the grinding wheel 90 to move relative to the sharpening pen 20, the knife 40 and the profiling mechanism 50 under the control of the control mechanism.
Referring to fig. 2, a reinforcing portion 11 is disposed at one end of the supporting seat 10 for fixing the sharpener pen 20, and two sides of the reinforcing portion 11 respectively extend from two sides of the supporting seat 10 in an inclined manner to reinforce the structural strength of the end of the supporting seat 10 for fixing the sharpener pen 20, so that the sharpener pen 20 can maintain a stable state when the grinding wheel 90 is dressed.
In one embodiment, the end of the sharpening pen 20 facing away from the support base 10 is provided with two obliquely arranged and intersecting blade faces 21, and the intersection of the two blade faces 21 forms a blade edge 22 for machining a grinding profile on the grinding wheel 90.
Referring to fig. 3, one side of the carriage 30 connected to the support base 10 is adjacent to one side of the support base 10 fixed to the sharpener pen 20. The two ends of the carriage 30 protrude from the supporting seat 10, so that the knife 40 and the profiling mechanism 50 mounted on the two ends of the carriage 30 respectively protrude from the supporting seat 10, so that the knife 40 and the profiling mechanism 50 can contact and trim the grinding wheel 90.
Specifically, the first end of the carrier 30 is provided with a first mounting groove 31, and the insert 40 is mounted in the first mounting groove 31. The first mounting groove 31 is provided with a first opening 311, and a part of the cutter 40 is positioned outside the first opening 311, and is used for finishing the grinding profile machined on the grinding wheel 90 and removing floating sand attached to the surface of the grinding wheel 90; the other part is supported against the inner wall of the first mounting groove 31 for fixing the position of the knife 40 and stabilizing the knife 40 when dressing the grinding wheel 90.
It can be understood that when the portion of the knife element 40 outside the first opening 311 is dull, the portion of the knife element 40 that originally abuts against the inner wall of the first mounting groove 31 is turned to be outside the first opening 311 for reuse. In one embodiment, the first mounting groove 31 has an arc-shaped peripheral side to facilitate turning the insert 40.
The second end of the carrier 30 is provided with a second mounting slot 32 and the profiling mechanism 50 is mounted in the second mounting slot 32. The second mounting groove 32 is provided with a second opening 321, and a part of the profiling mechanism 50 is positioned outside the second opening 321 and used for removing floating sand attached to the surface of the grinding wheel 90 and enabling the grinding wheel 90 to obtain a grinding surface matched with a target finished product; the other part is supported against the inner wall of the second mounting groove 32 and is used for fixing the position of the profiling mechanism 50 and keeping the knife element 40 stable when the grinding wheel 90 is dressed.
In one embodiment, the carrier 30 has at least two mounting holes 33 for fasteners to pass through to couple the carrier 30 to the support base 10. The mounting holes 33 are spaced apart to allow uniform force between the carriage 30 and the support seat 10. It will be appreciated that in other embodiments, the carrier 30 is integrally formed with the support seat 10 to improve the structural stability of the connection of the carrier 30 to the support seat 10.
In one embodiment, the insert 40 is a spherical insert for milling a curved surface to fit the curved surface to be dressed by the grinding wheel 90, thereby facilitating the finishing of the grinding profile machined on the grinding wheel 90 and the removal of floating sand attached to the surface of the grinding wheel 90 by the insert 40.
The profiling mechanism 50 is provided with a curved profiling surface 51, the curvature of the profiling surface 51 being the same as the curvature of the surface profile of the target product to be machined by the grinding wheel 90. The profiling mechanism 50 is attached to the grinding wheel 90 when the grinding wheel 90 is dressed, and is configured to further remove floating sand attached to the surface of the grinding wheel 90, so that the grinding wheel 90 obtains a polished surface adapted to a target finished product. Compared with the prior grinding wheel dressing device without the profiling surface, the grinding wheel dressing device avoids the condition that the size of the processed material is larger due to sand falling during the initial operation of the grinding wheel 90, and improves the processing precision. And the profiling surface 51 is attached to the grinding wheel 90, so that the profiling surface 51 uniformly cuts the grinding wheel 90, and the problem of poor transverse striation caused by uneven surface of the grinding wheel 90 is solved.
In the truing device 100, the two ends of the carriage 30 protrude from the supporting base 10, so that the knife 40 and the copying mechanism 50 can contact and tru the grinding wheel 90. The knife repairing pen 20, the knife element 40 and the profiling surface 51 are matched to sequentially process a polishing profile on the grinding wheel 90, remove floating sand attached to the surface of the grinding wheel 90, enable the grinding wheel 90 to obtain a polishing surface matched with a target finished product, effectively remove floating sand and improve the repairing efficiency.
Referring to fig. 1 again, the moving mechanism 60 is used to drive the grinding wheel 90 to move relative to the sharpening pen 20, the knife 40 and the copying mechanism 50 under the control of the control mechanism. In addition, the moving mechanism 60 is further configured to sequentially bring the grinding wheel 90 into contact with the sharpening pen 20, the cutter 40 and the contoured surface 51 under the control of the control mechanism, so that the sharpening pen 20, the cutter 40 and the contoured surface 51 sequentially trim the grinding wheel 90.
Specifically, the sharpening pen 20 is configured to machine a grinding profile on the peripheral side of the grinding wheel 90 when the control mechanism controls the moving mechanism 60 to drive the grinding wheel 90 to contact with the sharpening pen 20.
The knife 40 is used for trimming the grinding profile into a grinding surface and removing floating sand attached to the grinding surface when the control mechanism controls the moving mechanism 60 to drive the grinding wheel 90 to contact with the knife 40.
The profiling surface 51 is used for contacting with the polishing surface and further removing floating sand attached to the polishing surface when the control mechanism controls the moving mechanism 60 to drive the grinding wheel 90 to contact with the profiling surface 51, so that the polishing surface is matched with the surface profile of a target finished product to be processed by the grinding wheel 90.
The moving mechanism 60 is further configured to sequentially drive the grinding wheel 90 to rotate clockwise and counterclockwise when the control mechanism controls the moving mechanism 60 to drive the grinding wheel 90 to contact the profiling surface 51, so that the problem of poor transverse striations caused by uneven surface of the grinding wheel 90 is solved through clockwise and counterclockwise milling of the grinding wheel 90.
When the control mechanism drives the grinding wheel 90 to contact and trim the cutter repairing pen 20, the cutter 40 and the profiling surface 51, data updating is carried out according to the trimming amount of the grinding wheel 90. The control mechanism adjusts the movement amount of the control movement mechanism 60 again according to the updated data, so that the grinding wheel 90 is attached to the dressing pen 20, the cutter 40 and the profiling surface 51, thereby effectively removing floating sand and improving dressing efficiency.
In the grinding wheel dressing apparatus 100, the moving mechanism 60 is engaged with the control mechanism, so that the dressing pen 20, the cutter 40 and the profiling surface 51 sequentially dress the grinding wheel 90, thereby effectively removing floating sand and improving dressing efficiency. The moving mechanism 60 sequentially drives the grinding wheel 90 to sequentially rotate clockwise and anticlockwise when contacting the profiling surface 51, so that the problem of poor transverse striation caused by uneven surface of the grinding wheel 90 is solved. The control mechanism adjusts and controls the movement amount of the moving mechanism 60 through the updated data, so that the grinding wheel 90 is attached to the dressing pen 20, the cutter 40 and the profiling surface 51, and floating sand is effectively removed and dressing efficiency is improved.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present application and are not to be taken as limiting the present application, and that suitable changes and modifications to the above embodiments are within the scope of the present disclosure as long as they are within the spirit and scope of the present application.
Claims (10)
1. A wheel truing apparatus for truing a grinding wheel, said wheel truing apparatus comprising:
a supporting seat;
the knife repairing pen is fixed on the supporting seat and used for machining a grinding profile on the grinding wheel;
characterized in that, the grinding wheel dressing device further comprises:
the bearing frame is connected with the supporting seat, and two ends of the bearing frame protrude out of the supporting seat;
the cutter is connected with the first end of the bearing frame and used for finishing the grinding profile machined on the grinding wheel and removing floating sand attached to the surface of the grinding wheel; and
the profiling mechanism is connected with the second end of the bearing frame and provided with an arc-shaped profiling surface, the radian of the profiling surface is the same as that of the surface profile of a target finished product to be processed by the grinding wheel, and floating sand attached to the surface of the grinding wheel is further removed, so that the grinding wheel can obtain a polished surface matched with the target finished product.
2. The wheel truing apparatus of claim 1 wherein: bear the first end of frame and be equipped with first mounting groove, first mounting groove is equipped with first opening, the knife tackle spare install in the first mounting groove, a part of knife tackle spare is located outside the first opening.
3. The wheel truing apparatus of claim 2 wherein: the second end of bearing the frame is equipped with the second mounting groove, the second mounting groove is equipped with the second opening, profiling mechanism install in the second mounting groove, the profile surface is located outside the second opening.
4. The wheel truing apparatus of claim 1 wherein: the knife piece is a spherical knife particle.
5. The wheel truing apparatus of claim 1 wherein: the grinding wheel dressing device further comprises a moving mechanism and a control mechanism, the grinding wheel is rotatably mounted on the moving mechanism, and the moving mechanism is used for driving the grinding wheel to move relative to the knife repairing pen, the knife piece and the profiling mechanism respectively under the control of the control mechanism.
6. The wheel truing apparatus of claim 5 wherein: the moving mechanism is further used for sequentially driving the grinding wheel to be in contact with the knife repairing pen, the knife piece and the profiling surface under the control of the control mechanism.
7. The wheel truing apparatus of claim 6 wherein: the knife repairing pen is used for machining a grinding profile on the peripheral side of the grinding wheel when the control mechanism controls the moving mechanism to drive the grinding wheel to be in contact with the knife repairing pen.
8. The wheel truing apparatus of claim 7 wherein: the cutter is used for trimming the polishing profile into a polishing surface and removing floating sand attached to the polishing surface when the control mechanism controls the moving mechanism to drive the grinding wheel to contact with the cutter.
9. The wheel truing apparatus of claim 8 wherein: the profiling surface is used for contacting the polishing surface and further removing floating sand attached to the polishing surface when the control mechanism controls the moving mechanism to drive the grinding wheel to contact with the profiling surface, so that the polishing surface is matched with the finished product.
10. The wheel truing apparatus of claim 9 wherein: the moving mechanism is further used for sequentially driving the grinding wheel to rotate clockwise and anticlockwise when the control mechanism controls the moving mechanism to drive the grinding wheel to contact with the profiling surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023231229.6U CN215092961U (en) | 2020-12-29 | 2020-12-29 | Grinding wheel dressing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023231229.6U CN215092961U (en) | 2020-12-29 | 2020-12-29 | Grinding wheel dressing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215092961U true CN215092961U (en) | 2021-12-10 |
Family
ID=79308829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023231229.6U Active CN215092961U (en) | 2020-12-29 | 2020-12-29 | Grinding wheel dressing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215092961U (en) |
-
2020
- 2020-12-29 CN CN202023231229.6U patent/CN215092961U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6428397B1 (en) | Wafer edge polishing method and apparatus | |
| US5720649A (en) | Optical lens or lap blank surfacing machine, related method and cutting tool for use therewith | |
| JP2007245337A (en) | Grinding wheel, machine tool with grinding wheel and method for grinding cutting tools | |
| JP2005118989A (en) | Automatic polishing method of titanium-made and titanium alloy-made mechanical parts | |
| CN108972354B (en) | Numerical control grinding and finishing machining method for shot blasting surface of blade | |
| CN215092961U (en) | Grinding wheel dressing device | |
| CN109202692B (en) | Grinding device and grinding operation method | |
| CN202491141U (en) | Knife grinder with improved structure | |
| JP2002126986A (en) | Lens machining method | |
| JPS61146471A (en) | Dressing device | |
| CN218017455U (en) | Automatic go up blade of unloading and grind machine | |
| CN217648053U (en) | Accurate knife sharpener | |
| JPH07121508B2 (en) | How to shape a grinding wheel | |
| CN220838117U (en) | Anti-shake circular arc milling cutter | |
| AU2012101361A4 (en) | Roll form wheel dresser with multiple curvatures for dressing different sized grinding wheels | |
| CN215847637U (en) | Height-adjustable device for grinding wheel cutter repairing of numerical control machine tool | |
| CN209793286U (en) | numerical control wave edge milling cutter relief grinding machine and trimming device | |
| CN211278007U (en) | Grinding wheel online finishing mechanism | |
| JP5173592B2 (en) | Method of bending cylindrical workpiece, centerless grinding method and apparatus | |
| JPH10193262A (en) | Method and device for dressing grinding wheel for centerless grinding machine and centerless grinding machine | |
| JP2006123133A (en) | Truing method | |
| JP4370743B2 (en) | Polishing wheel dressing equipment | |
| JP2001054864A (en) | Grinding method and grinding wheel using it | |
| JP3127493B2 (en) | How to fix a whetstone | |
| JPS5856767A (en) | Correction method for super grinding wheel and device for the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240126 Address after: 030032 No. 1, Longfei Street, Tanghuai Park, Taiyuan Comprehensive Reform Demonstration Zone, Taiyuan City, Shanxi Province Patentee after: Fulian Technology (Shanxi) Co.,Ltd. Country or region after: China Address before: 030032 No.1 Longfei street, Taiyuan Economic and Technological Development Zone, Shanxi Province Patentee before: HONGFUJIN PRECISION INDUSTRY (TAIYUAN) CO.,LTD. Country or region before: China |