CN204277673U - A kind of plane grinding apparatus of composite polycrystal-diamond - Google Patents
A kind of plane grinding apparatus of composite polycrystal-diamond Download PDFInfo
- Publication number
- CN204277673U CN204277673U CN201420718955.6U CN201420718955U CN204277673U CN 204277673 U CN204277673 U CN 204277673U CN 201420718955 U CN201420718955 U CN 201420718955U CN 204277673 U CN204277673 U CN 204277673U
- Authority
- CN
- China
- Prior art keywords
- diamond
- composite polycrystal
- manhole
- frock
- grinding apparatus
- 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
Landscapes
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
The utility model provides a kind of plane grinding apparatus of composite polycrystal-diamond, comprising: electromagnet substrate; Be arranged on the suprabasil frock of electromagnet, for fixing processed composite polycrystal-diamond; Described frock is provided with multiple manhole.Compared with prior art, the plane grinding apparatus of the composite polycrystal-diamond that the utility model provides improves the machining accuracy of composite polycrystal-diamond effectively, and the height of the composite polycrystal-diamond after processing and the depth of parallelism and perpendicularity all reach qualified products requirement.In addition, the plane grinding apparatus that the utility model provides is easy to use, and working (machining) efficiency is high, and cost is low, pollution-free.
Description
Technical field
The utility model relates to Machining Technology field, more particularly, relates to a kind of plane grinding apparatus of composite polycrystal-diamond.
Background technology
Composite polycrystal-diamond (polycrystalline diamond compact, PDC) new function material is belonged to, adopt diadust and cemented carbide substrate to sinter under high pressure high temperature condition to form, both there is adamantine high rigidity, high-wearing feature and thermal conductivity, having again intensity and the toughness of carbide alloy, is the ideal material manufacturing cutting tool, drilling bit and other wear resistant tools.
In actual production process, need to carry out flat surface grinding to the cemented carbide substrate part of composite polycrystal-diamond, traditional flat surface grinding method is by diamond layer down, evenly be placed on steel plate, bonding with 502 glue, after solidifying, above-mentioned steel plate is placed on surface grinding machine, flat surface grinding is carried out to the composite polycrystal-diamond be bonded on steel plate.But adopt in this way, the applying amount of 502 glue directly can affect planar processing precision, perpendicularity and the depth of parallelism of the composite polycrystal-diamond after processing therefore cannot be ensured; And the glue solidifies time was at 1 hour ~ 3 hours, not only working (machining) efficiency is low also to need high temperature to remove 502 glue after flat surface grinding, and 502 glue high temperature to dissolve the gas environmental pollution of rear generation serious.
Utility model content
In view of this, the purpose of this utility model is the plane grinding apparatus providing a kind of composite polycrystal-diamond, to improve the machining accuracy of composite polycrystal-diamond.
The utility model provides a kind of plane grinding apparatus of composite polycrystal-diamond, comprising:
Electromagnet substrate;
Be arranged on the suprabasil frock of described electromagnet, for fixing processed composite polycrystal-diamond;
Described frock is provided with multiple manhole.
Preferably, the depth of parallelism of upper and lower two planes of described electromagnet substrate is 0.05.
Preferably, the depth of parallelism of two planes up and down of described frock is 0.05; The perpendicularity of upper and lower two planes of described frock and manhole circle core shaft is 0.05.
Preferably, the thickness of described frock is less than the thickness of processed composite polycrystal-diamond; The thickness difference of described processed composite polycrystal-diamond and described frock is 0.5mm ~ 1.5mm.
Preferably, the diameter of described manhole is greater than the diameter of processed composite polycrystal-diamond; The diameter difference of described manhole and described processed composite polycrystal-diamond is 0.05mm ~ 0.08mm.
Preferably, the quantity of described manhole is 50 ~ 200.
Preferably, in described multiple manhole, the spacing of the manhole of arbitrary neighborhood is 5mm ~ 10mm.
The utility model provides a kind of plane grinding apparatus of composite polycrystal-diamond, comprising: electromagnet substrate; Be arranged on the suprabasil frock of electromagnet, for fixing processed composite polycrystal-diamond; Described frock is provided with multiple manhole.Compared with prior art, the plane grinding apparatus of the composite polycrystal-diamond that the utility model provides improves the machining accuracy of composite polycrystal-diamond effectively, and the height of the composite polycrystal-diamond after processing and the depth of parallelism and perpendicularity all reach qualified products requirement.In addition, the plane grinding apparatus that the utility model provides is easy to use, and working (machining) efficiency is high, and cost is low, pollution-free.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiment of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
The structural representation of the plane grinding apparatus of the composite polycrystal-diamond that Fig. 1 provides for the utility model;
The structural representation of the processed composite polycrystal-diamond that Fig. 2 provides for the utility model;
The top view of the frock of the plane grinding apparatus that Fig. 3 provides for the utility model;
The plane grinding apparatus that Fig. 4 provides for embodiment 1 ~ 3 carries out the structural representation of flat surface grinding to processed composite polycrystal-diamond.
Detailed description of the invention
Core of the present utility model is the plane grinding apparatus providing a kind of composite polycrystal-diamond, to realize the machining accuracy improving composite polycrystal-diamond.
Below in conjunction with the utility model embodiment, be clearly and completely described the technical solution of the utility model, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
The utility model provides a kind of plane grinding apparatus of composite polycrystal-diamond, comprising:
Electromagnet substrate;
Be arranged on the suprabasil frock of described electromagnet, for fixing processed composite polycrystal-diamond;
Described frock is provided with multiple manhole.
Refer to Fig. 1 ~ 3, the structural representation of the plane grinding apparatus of the composite polycrystal-diamond that Fig. 1 provides for the utility model, wherein, 1 is electromagnet substrate, and 2 is frock, and 3 is processed composite polycrystal-diamond; The structural representation of the processed composite polycrystal-diamond that Fig. 2 provides for utility model, wherein, 4 is the alloy-layer of processed composite polycrystal-diamond, and 5 is the polycrystalline diamond layer of processed composite polycrystal-diamond; The top view of the frock of the plane grinding apparatus that Fig. 3 provides for the utility model, wherein, 2 is frock, and 6 is manhole.
In the utility model, described electromagnet substrate (1) is rectangular-shaped electromagnet, and the size of the utility model to described electromagnet substrate (1) is not particularly limited, and can be convenient to be placed on the enterprising parallel planes grinding of grinding machine; The depth of parallelism of upper and lower two planes of described electromagnet substrate (1) is 0.05.In the utility model, described electromagnet substrate (1) is when opening power, have ferromagnetism, the size of the utility model to described magnetic is not particularly limited, and firmly can adsorb grinding machine, frock (2) and composite polycrystal-diamond (3).In the utility model, described electromagnet substrate (1) can be adsorbed on grinding machine on the one hand, plane grinding apparatus is avoided to slide on grinding machine, adsorption tooling (2) and processed composite polycrystal-diamond (3) on the other hand, makes processed composite polycrystal-diamond (3) carry out to be fixed by frock (2) in flat surface grinding process.
In the utility model, described electromagnet substrate (1) is provided with frock (2), for fixing processed composite polycrystal-diamond (3); Described frock (2), for rectangular-shaped, is preferably stainless steel materials.The size of the utility model to described frock (2) lower planes is not particularly limited, and is less than the size of electromagnet substrate (1) lower planes; Described frock (2) is arranged on described electromagnet substrate (1), the lower plane of described frock (2) and the upper flat face of described electromagnet substrate (1) touch, and the lower plane of described frock (2) is in the upper plane of electromagnet substrate (1) completely.In the utility model, the depth of parallelism of two planes up and down of described frock (2) is 0.05.
In the utility model, described frock (2) is provided with multiple manhole (6); The perpendicularity of upper and lower two planes of described frock (2) and described manhole (6) circle core shaft is 0.05.
In the utility model, described electromagnet substrate (1) is parallel with described frock (2) each plane, and vertical with manhole (6) circular shaft of described frock (2), the machining accuracy that processed composite polycrystal-diamond (3) carries out flat surface grinding can be improved.
In the utility model, described processed composite polycrystal-diamond (3) is preferably dimensioned to be Φ 19.05mm × h13.20mm, Φ 16.00mm × h13.20mm or Φ 13.44mm × h8.00mm.In the utility model, described processed composite polycrystal-diamond (3) is fixed in the manhole (6) of described frock (2), the polycrystalline diamond layer (5) of described processed composite polycrystal-diamond (3) is positioned at manhole (6) and contacts with electromagnet substrate (1), and the plane of the alloy-layer (4) of described processed composite polycrystal-diamond (3) is in processed position.The thickness of described frock (2) is less than the thickness of processed composite polycrystal-diamond (3), carries out flat surface grinding to the part exceeding frock (2) thickness; Described processed composite polycrystal-diamond (3) is preferably 0.5mm ~ 1.5mm with the thickness difference of described frock (2), is more preferably 1.2mm.
The diameter of described manhole (6) is greater than the diameter of processed composite polycrystal-diamond (3), and processed composite polycrystal-diamond (3) can be placed in manhole; Described manhole (6) is preferably 0.05mm ~ 0.08mm with the diameter difference of described processed composite polycrystal-diamond (3), is more preferably 0.06mm.
In the utility model, the quantity of described manhole (6) is preferably 50 ~ 200, is more preferably 64.In described multiple manhole (6), the spacing of the manhole (6) of arbitrary neighborhood is preferably 5mm ~ 10mm, is more preferably 5.5mm.In the utility model, described frock (2) is provided with multiple manhole (6), grinding can be carried out to the plane of the alloy-layer (4) of multiple processed composite polycrystal-diamond (3), improve working (machining) efficiency; Meanwhile, the design of multiple manhole (6) spacing, ensure that in flat surface grinding process, manhole (6) is not yielding, and avoids converted products height inconsistent.
The plane grinding apparatus of the composite polycrystal-diamond provided according to above-mentioned the utility model can realize carrying out flat surface grinding to the alloy-layer of processed composite polycrystal-diamond, and its course of work is as follows:
Described processed composite polycrystal-diamond (3) is loaded in the manhole (6) of described frock (2), again the above-mentioned plane grinding apparatus that described processed composite polycrystal-diamond (3) is housed is placed on grinding machine, then the power supply of electromagnet substrate (1) is opened, by emery wheel, flat surface grinding is carried out to described processed composite polycrystal-diamond (3), after completing flat surface grinding, close the power supply of electromagnet substrate (1), take out the composite polycrystal-diamond after processing.
The mode that described processed composite polycrystal-diamond (3) loads in the manhole (6) of described frock (2) is specially:
The polycrystalline diamond layer (5) of described processed composite polycrystal-diamond (3) is positioned at manhole (6) and contacts with electromagnet substrate (1), and the plane of the alloy-layer (4) of described processed composite polycrystal-diamond (3) is in processed position.
The utility model provides a kind of plane grinding apparatus of composite polycrystal-diamond, comprising: electromagnet substrate; Be arranged on the suprabasil frock of electromagnet, for fixing processed composite polycrystal-diamond; Described frock is provided with multiple manhole.Compared with prior art, the plane grinding apparatus of the composite polycrystal-diamond that the utility model provides improves the machining accuracy of composite polycrystal-diamond effectively, and the height of the composite polycrystal-diamond after processing and the depth of parallelism and perpendicularity all reach qualified products requirement.In addition, the plane grinding apparatus that the utility model provides is easy to use, and working (machining) efficiency is high, and cost is low, pollution-free.
In order to further illustrate the utility model, be described in detail below by following examples.
Embodiment 1
The plane grinding apparatus that embodiment 1 provides carries out the structural representation of flat surface grinding to processed composite polycrystal-diamond, as shown in Figure 4; Wherein, 1 is electromagnet substrate, and 2 is frock, 3 is processed composite polycrystal-diamond, and 4 is the alloy-layer of processed composite polycrystal-diamond, and 5 is the polycrystalline diamond layer of processed composite polycrystal-diamond, 6 is manhole, and 7 is emery wheel, and 8 is grinding machine.
Described electromagnet substrate (1) is of a size of 250mm × 250mm × 10mm, and the depth of parallelism of upper and lower two planes is 0.05.
Described frock (2) is of a size of 202mm × 202mm × 12mm, and the depth of parallelism of upper and lower two planes is 0.05.
Described frock (2) is arranged 64 manholes (6), the perpendicularity of upper and lower two planes of described frock (2) and manhole (6) circle core shaft is 0.05; The diameter of described manhole (6) is 19.11mm, and the spacing of adjacent manhole (6) is 5.5mm.
Described processed composite polycrystal-diamond (3) is of a size of Φ 19.05mm × h13.20mm.
Described processed composite polycrystal-diamond (3) is loaded in the manhole (6) of described frock (2), the polycrystalline diamond layer (5) of described processed composite polycrystal-diamond (3) is positioned at manhole (6) and contacts with electromagnet substrate (1), and the plane of the alloy-layer (4) of described processed composite polycrystal-diamond (3) is in processed position; The plane grinding apparatus that processed composite polycrystal-diamond (3) is housed is placed on grinding machine (8), open the power supply of electromagnet substrate (1), make plane grinding apparatus be fixed on grinding machine (8), carry out grinding by the plane of emery wheel (7) to the alloy-layer (4) of processed composite polycrystal-diamond (3); After completing flat surface grinding, close the power supply of electromagnet substrate (1), take out the composite polycrystal-diamond after processing.
Through measuring, the height of the composite polycrystal-diamond after processing and the depth of parallelism and perpendicularity all reach qualified products requirement.
Embodiment 2
The plane grinding apparatus that embodiment 2 provides carries out the structural representation of flat surface grinding to processed composite polycrystal-diamond, as shown in Figure 4; Wherein, 1 is electromagnet substrate, and 2 is frock, 3 is processed composite polycrystal-diamond, and 4 is the alloy-layer of processed composite polycrystal-diamond, and 5 is the polycrystalline diamond layer of processed composite polycrystal-diamond, 6 is manhole, and 7 is emery wheel, and 8 is grinding machine.
Described electromagnet substrate (1) is of a size of 250mm × 250mm × 10mm, and the depth of parallelism of upper and lower two planes is 0.05.
Described frock (2) is of a size of 230mm × 230mm × 12mm, and the depth of parallelism of upper and lower two planes is 0.05.
Described frock (2) is arranged 64 manholes (6), the perpendicularity of upper and lower two planes of described frock (2) and manhole (6) circle core shaft is 0.05; The diameter of described manhole (6) is 16.06mm, and the spacing of adjacent manhole (6) is 5.5mm.
Described processed composite polycrystal-diamond (3) is of a size of Φ 16.00mm × h13.20mm.
Described processed composite polycrystal-diamond (3) is loaded in the manhole (6) of described frock (2), the polycrystalline diamond layer (5) of described processed composite polycrystal-diamond (3) is positioned at manhole (6) and contacts with electromagnet substrate (1), and the plane of the alloy-layer (4) of described processed composite polycrystal-diamond (3) is in processed position; The plane grinding apparatus that processed composite polycrystal-diamond (3) is housed is placed on grinding machine (8), open the power supply of electromagnet substrate (1), make plane grinding apparatus be fixed on grinding machine (8), carry out grinding by the plane of emery wheel (7) to the alloy-layer (4) of processed composite polycrystal-diamond (3); After completing flat surface grinding, close the power supply of electromagnet substrate (1), take out the composite polycrystal-diamond after processing.
Through measuring, the height of the composite polycrystal-diamond after processing and the depth of parallelism and perpendicularity all reach qualified products requirement.
Embodiment 3
The plane grinding apparatus that embodiment 3 provides carries out the structural representation of flat surface grinding to processed composite polycrystal-diamond, as shown in Figure 4; Wherein, 1 is electromagnet substrate, and 2 is frock, 3 is processed composite polycrystal-diamond, and 4 is the alloy-layer of processed composite polycrystal-diamond, and 5 is the polycrystalline diamond layer of processed composite polycrystal-diamond, 6 is manhole, and 7 is emery wheel, and 8 is grinding machine.
Described electromagnet substrate (1) is of a size of 250mm × 250mm × 10mm, and the depth of parallelism of upper and lower two planes is 0.05.
Described frock (2) is of a size of 200mm × 200mm × 7.0mm, and the depth of parallelism of upper and lower two planes is 0.05.
Described frock (2) is arranged 64 manholes (6), the perpendicularity of upper and lower two planes of described frock (2) and manhole (6) circle core shaft is 0.05; The diameter of described manhole (6) is 13.50mm, and the spacing of adjacent manhole (6) is 5.5mm.
Described processed composite polycrystal-diamond (3) is of a size of Φ 13.44mm × h8.00mm.
Described processed composite polycrystal-diamond (3) is loaded in the manhole (6) of described frock (2), the polycrystalline diamond layer (5) of described processed composite polycrystal-diamond (3) is positioned at manhole (6) and contacts with electromagnet substrate (1), and the plane of the alloy-layer (4) of described processed composite polycrystal-diamond (3) is in processed position; The plane grinding apparatus that processed composite polycrystal-diamond (3) is housed is placed on grinding machine (8), open the power supply of electromagnet substrate (1), make plane grinding apparatus be fixed on grinding machine (8), carry out grinding by the plane of emery wheel (7) to the alloy-layer (4) of processed composite polycrystal-diamond (3); After completing flat surface grinding, close the power supply of electromagnet substrate (1), take out the composite polycrystal-diamond after processing.
Through measuring, the height of the composite polycrystal-diamond after processing and the depth of parallelism and perpendicularity all reach qualified products requirement.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from spirit or scope of the present utility model, can realize in other embodiments.Therefore, the utility model can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (7)
1. a plane grinding apparatus for composite polycrystal-diamond, is characterized in that, comprising:
Electromagnet substrate;
Be arranged on the suprabasil frock of described electromagnet, for fixing processed composite polycrystal-diamond;
Described frock is provided with multiple manhole.
2. plane grinding apparatus according to claim 1, is characterized in that, the depth of parallelism of upper and lower two planes of described electromagnet substrate is 0.05.
3. plane grinding apparatus according to claim 1, is characterized in that, the depth of parallelism of two planes up and down of described frock is 0.05; The perpendicularity of upper and lower two planes of described frock and manhole circle core shaft is 0.05.
4. plane grinding apparatus according to claim 1, is characterized in that, the thickness of described frock is less than the thickness of processed composite polycrystal-diamond; The thickness difference of described processed composite polycrystal-diamond and described frock is 0.5mm ~ 1.5mm.
5. plane grinding apparatus according to claim 1, is characterized in that, the diameter of described manhole is greater than the diameter of processed composite polycrystal-diamond; The diameter difference of described manhole and described processed composite polycrystal-diamond is 0.05mm ~ 0.08mm.
6. plane grinding apparatus according to claim 1, is characterized in that, the quantity of described manhole is 50 ~ 200.
7. plane grinding apparatus according to claim 1, is characterized in that, in described multiple manhole, the spacing of the manhole of arbitrary neighborhood is 5mm ~ 10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420718955.6U CN204277673U (en) | 2014-11-26 | 2014-11-26 | A kind of plane grinding apparatus of composite polycrystal-diamond |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420718955.6U CN204277673U (en) | 2014-11-26 | 2014-11-26 | A kind of plane grinding apparatus of composite polycrystal-diamond |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204277673U true CN204277673U (en) | 2015-04-22 |
Family
ID=52860869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420718955.6U Active CN204277673U (en) | 2014-11-26 | 2014-11-26 | A kind of plane grinding apparatus of composite polycrystal-diamond |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204277673U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114367888A (en) * | 2021-12-29 | 2022-04-19 | 河南四方达超硬材料股份有限公司 | Preparation method of polycrystalline diamond compact SEM sample |
-
2014
- 2014-11-26 CN CN201420718955.6U patent/CN204277673U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114367888A (en) * | 2021-12-29 | 2022-04-19 | 河南四方达超硬材料股份有限公司 | Preparation method of polycrystalline diamond compact SEM sample |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104907941B (en) | A kind of silicon nitride ceramic ball slightly grinds special major diameter skive and preparation method | |
| CN204277673U (en) | A kind of plane grinding apparatus of composite polycrystal-diamond | |
| CN103009245B (en) | Form grinding dresser | |
| CN201931363U (en) | Annular multilayer grinding wheel | |
| CN203185144U (en) | Grinding tool of sheet part | |
| CN203265915U (en) | Laser die-cutting jig for electronic product ferrite material die-cutting piece | |
| CN203141327U (en) | Combined diamond grinding wheel | |
| CN204748363U (en) | Split formula emery wheel | |
| CN204450260U (en) | The device of abrasive material multilayer order arrangement | |
| CN204868529U (en) | A device for flat grinder processes polycrystalline diamond compact | |
| CN102862122A (en) | Polycrystalline diamond grinding wheel dresser and manufacturing method thereof | |
| CN202846387U (en) | Plane vane wheel | |
| CN202910714U (en) | Grinding plate provided with magnet | |
| CN204772139U (en) | Burnish sand wheel and PCB board grinder | |
| CN202934469U (en) | Diamond grinding wheel die provided with water tank | |
| CN202878099U (en) | Hollow grinding disc | |
| CN202895020U (en) | Diamond grinding wheel | |
| CN203045547U (en) | Diamond grinding wheel | |
| CN206047907U (en) | A kind of vacuum adsorption fixture that processing is ground for permanent magnet material | |
| CN203696790U (en) | Ceramic bond diamond grinding disc for grinding iron-based powder metallurgy double-plane part | |
| CN203918809U (en) | A kind of durable abrasive wheel | |
| CN202763662U (en) | Special clamping device for grinding outer arc of crank component | |
| CN102528642B (en) | Grinding method and device for non-magnetic thin sheet parts | |
| CN203099289U (en) | Alloy bar for machining alloy cutter | |
| CN103317414B (en) | The grinding attachment of oil scraper ring and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Xinzheng City, Henan province 451100 Zhengzhou eight thousand Xiang Xingang Avenue on the west side of Henan Jingrui Superhard Materials Co., Ltd. Patentee after: HENAN JINGRUI SUPERHARD MATERIAL CO., LTD. Address before: Xinzheng City, Henan province 451100 Zhengzhou eight thousand Xiang Xingang Avenue on the west side of Henan Jingrui Superhard Materials Co., Ltd. Patentee before: Henan Jingrui Superhard Material Co., Ltd. |
|
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 451162 Henan airport, Zhengzhou, west side of Xingang Avenue Patentee after: HENAN JINGRUI SUPERHARD MATERIAL CO., LTD. Address before: Xinzheng City, Henan province 451100 Zhengzhou eight thousand Xiang Xingang Avenue on the west side of Henan Jingrui Superhard Materials Co., Ltd. Patentee before: HENAN JINGRUI SUPERHARD MATERIAL CO., LTD. |