CN114833735B - Static sand feeding device for brazing wire saw preparation - Google Patents
Static sand feeding device for brazing wire saw preparation Download PDFInfo
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- CN114833735B CN114833735B CN202210468197.6A CN202210468197A CN114833735B CN 114833735 B CN114833735 B CN 114833735B CN 202210468197 A CN202210468197 A CN 202210468197A CN 114833735 B CN114833735 B CN 114833735B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
- B24D18/0054—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for by impressing abrasive powder in a matrix
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
- B24D18/0072—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for using adhesives for bonding abrasive particles or grinding elements to a support, e.g. by gluing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The invention discloses an electrostatic sand feeding device for brazing wire saw preparation, which comprises an upper sand cavity, two material tanks, a matrix core wire and a wire feeding mechanism, wherein the matrix core wire passes through the upper sand cavity through the wire feeding mechanism along the direction overlapped with the central axis of the upper sand cavity, a sand guide plate is fixedly connected on the whole body of the left side and the right side of the upper sand cavity respectively, a leak is formed at the joint of the two sides of the upper sand cavity and the sand guide plate, the two material tanks are correspondingly arranged above the two sand guide plates respectively, an upper polar plate and a lower polar plate are arranged on the inner wall surfaces of the top and the bottom in the upper sand cavity respectively, the upper polar plate and the lower polar plate are opposite to each other up and down in the upper sand cavity, and the upper polar plate and the lower polar plate are respectively connected with a positive electrode and a negative electrode of a power supply. It has the following advantages: the sand feeding device has the advantages of uniform sand feeding, simple structure, ingenious conception and high sand feeding efficiency.
Description
Technical Field
The invention relates to an electrostatic sanding device for preparing a brazing wire saw.
Background
With the rapid development of the photoelectric and semiconductor industries, the applications of hard and brittle materials such as crystalline silicon, sapphire, silicon carbide and the like are increasingly wide, and the requirements of the industries on the surface quality and processing of wafers are also increasingly high. Currently, the multi-wire cutting technology of a consolidated diamond wire saw is mostly adopted for cutting crystal bars in the semiconductor industry. The multi-wire cutting technology of the consolidated diamond wire saw has the advantages of narrow cutting seam on the processing surface, high yield, good surface quality and the like, and at least hundreds of wafers can be formed by one-time cutting, so that the production efficiency is greatly improved.
The common consolidated diamond wire saw in the market is an electroplated wire saw, and mainly adopts a sand burying method, a sand falling method and a brush plating method to wrap and consolidate diamond abrasive materials on a wire saw matrix core wire. Because the abrasive particles of the electroplated wire saw are mechanically held, the abrasive particles are easy to fall off in the actual processing of the brittle and hard material. In order to solve the problem, a brazing method is used for preparing the wire saw, and the method can realize chemical metallurgical connection of abrasive particles and a matrix core wire and effectively improve the holding capacity of the abrasive particles of the wire saw.
In the preparation of the brazing wire saw, the continuous, stable, uniform and controllable sand feeding is of great importance to the preparation of the brazing wire saw, and the small sand feeding amount or uneven sand feeding distribution can directly lead to the reduction or insufficiency of the cutting performance of the wire saw, so that higher requirements are put on a sand feeding mode and a device. Researchers generally apply sand in a mode of mixing and coating abrasive particles and adhesive or air spraying, sand burying and the like, and a large number of experiments prove that the sand applying method cannot effectively ensure the uniformity of sand application and cannot control the sand applying amount.
The electrostatic sanding technology in the tool preparation technology is easy to meet the uniform and controllable sanding requirement, and the electrostatic sanding is a common and effective technical means in abrasive belt abrasive particle tool preparation, and has no case of being applied to diamond wire saw preparation. The present invention relates to an electrostatic sand feeding device, and more particularly to an electrostatic sand feeding device for manufacturing belt-shaped tools such as sand paper and abrasive cloth, for example, patent No. CN110605222a, which discloses an electrostatic sand feeding structure for improving sand feeding uniformity and an electrostatic sand feeding device thereof. In patent No. CN110695864B, in the method for electrostatic sand planting of coated abrasive tool and its application, the invention proposes to use a belt with continuous pits or through holes as sand planting belt, abrasive particles are located in the pits of the belt or left on the surface of the belt after being discharged, and the abrasive particles are distributed on the base material coated with primer under the action of electric field, so that the abrasive particles can be uniformly and quantitatively distributed on the sand planting belt, and the purpose of quantitative sand planting is achieved. At present, all the patents of electrostatic sand planting are basically aimed at the preparation of a band-shaped tool, and an electrostatic sand feeding structure cannot be directly applied to sand feeding operation in the preparation process of a brazing wire saw with an extremely fine and circular section.
Disclosure of Invention
The invention provides an electrostatic sanding device for preparing a brazing wire saw, which overcomes the defects of the prior art in the background art.
The technical scheme adopted for solving the technical problems is as follows:
the utility model provides an electrostatic sand feeding device for brazing wire saw preparation, it includes cylindric last sand cavity, two silo that are used for going up the sand, wait to go up the base member heart yearn of sand and drive the wiring mechanism of base member heart yearn motion wiring, this base member heart yearn is passed in going up sand cavity and is worn out sand cavity from this last sand cavity axial another terminal surface along the direction of coincidence in the central axis of this last sand cavity through wiring mechanism from going up sand cavity axial one end, the peripheral body on the left and right sides of this last sand cavity has a sand guide plate respectively rigid coupling, the sand guide plate of this both sides is on a parallel with the central axis of going up sand cavity and extends to both sides oblique top from going up sand cavity, the leak is seted up to the junction of this last sand cavity both sides and sand guide plate, these two silos correspond respectively to be established in the top of these two sand guide plates, be equipped with respectively on the inner wall surface of top and bottom in this last sand cavity, this upper and lower polar plate are formed to be just right and put in the last polar plate and lower polar plate in the last polar plate and the positive and negative polar plate of power supply respectively.
In one embodiment: the inner wall of the upper sand cavity is provided with a plurality of bulge arrays at intervals along the circumferential direction, the bulge arrays are arranged symmetrically up and down and symmetrically left and right, the upper polar plate and the lower polar plate are correspondingly and tightly paved on the bulge arrays at the upper side and the lower side and form profiling bulges, so that tip discharge can be formed between the upper polar plate and the lower polar plate.
In one embodiment: the projection area of the upper polar plate in the vertical direction is equal to or larger than that of the lower polar plate in the vertical direction.
In one embodiment: a baffle is fixedly connected above the leaks of the peripheral body at the left side and the right side of the upper sand cavity respectively, and the baffles at the two sides respectively form blanking channels from the trough to the sand guide plates at the corresponding sides.
In one embodiment: the upper polar plate and the lower polar plate are made of conductive metal foil.
In one embodiment: the convex array and the sand feeding cavity are integrally formed.
Compared with the background technology, the technical proposal has the following advantages:
when the electrostatic sand feeding mechanism is adopted for the sand feeding operation of the matrix core line, the action principle is as follows: the base core wire attached with the adhesive walks between the upper polar plate and the lower polar plate along the wire walking path, sand grains fall on the lower polar plate through the leak, an electrostatic field for enabling the sand grains to move upwards is generated between the upper polar plate and the lower polar plate, the sand grains move upwards under the action of the electrostatic field and form a sand grain dispersion state like a sand storm in the upper sand cavity, and the sand grains are uniformly adhered on the base core wire.
Thanks to the design of the bulge matrix in the upper sand cavity, the upper polar plate and the lower polar plate are correspondingly and tightly paved on the bulge matrix at the upper side and the lower side to form profiling bulges, so that corona discharge can be generated between the upper polar plate and the lower polar plate, air in the cavity is ionized, an electrostatic field which enables sand grains to move upwards is generated, the electrostatic field discharge is uniform, and abrasive particles are uniformly attached to a matrix core wire, thereby improving the uniformity of the upper sand in the preparation process of the brazing wire saw.
The sand feeding device has the advantages of simple structure, ingenious conception and high sand feeding efficiency.
Drawings
The invention is further described below with reference to the drawings and examples.
Fig. 1 is a schematic view of the overall structure of an electrostatic sanding device for use in the preparation of a brazed wire saw.
Fig. 2 is a cross-sectional view of an electrostatic sanding device for use in the preparation of a brazed wire saw.
Fig. 3 is one of the partial cross-sectional perspective views of the electrostatic sanding device for use in the preparation of a brazed wire saw.
Fig. 4 is a second, partially sectioned perspective view of an electrostatic sanding device for use in the preparation of a brazed wire saw.
Detailed Description
Referring to fig. 1 to 4, an electrostatic sand feeding device for preparing a brazing wire saw comprises a cylindrical sand feeding cavity 10, two sand guide plates 20 for feeding sand, a base core wire 30 to be fed with sand and a wire feeding mechanism (not shown in the figure) for driving the base core wire to move, wherein the base core wire 30 penetrates into the sand feeding cavity 10 from one axial end of the sand feeding cavity 10 through the wire feeding mechanism along a direction coincident with the central axis of the sand feeding cavity 10 and penetrates out of the sand feeding cavity 10 from the other axial end of the sand feeding cavity 10, the outer circumferences of the left side and the right side of the sand feeding cavity 10 are respectively fixedly connected with a sand guide plate 11, the sand guide plates 11 on the two sides are parallel to the central axis of the sand feeding cavity 10 and extend obliquely upwards from the sand feeding cavity 10, a leakage plate 12 is arranged at the joint of the two sides of the sand feeding cavity 10 and the sand guide plates 11, the two sand guide plates 20 are respectively correspondingly arranged above the two sand guide plates 11, upper and lower electrode plates 40 are respectively arranged on the top and bottom surfaces of the upper and the bottom surfaces of the upper and lower electrode plates 50 are respectively opposite to each other, and an upper power supply electrode plate 50 and a lower electrode 50 are respectively arranged on the upper electrode plate and the upper electrode plate 50 and the lower electrode plates.
In order to ensure that the sanding device can stably walk wires and take-up wires to the matrix core wires 30, the routing mechanism should be provided with a guide wheel and a take-up wheel, and a tensioning mechanism is connected to the guide wheel end or the take-up end, so that the matrix core wires are in a tensioning state when sanding operation is performed, and abrasive particles can be further ensured to be more uniformly distributed on the matrix core wires. The tensioning mechanism is a magnetic powder brake assembled at the end part of the guide wheel or the wire winding wheel. Preferably, the magnetic powder brake is assembled at the end part of the guide wheel at the most upstream; or the magnetic powder brake is assembled at the end part of the take-up pulley at the most downstream; alternatively, the ends of the guide wheel and/or take-up wheel are fitted with a magnetic powder brake.
A plurality of raised arrays 60 are arranged on the inner wall of the sand feeding cavity 10 at intervals along the circumferential direction, and the raised arrays 60 and the sand feeding cavity 10 can be integrally formed. The bump arrays 60 are arranged symmetrically up and down and symmetrically left and right, the upper polar plate 40 and the lower polar plate 50 are correspondingly and tightly paved on the bump arrays 60 at the upper side and the lower side and form profiling bumps, so that corona type point discharge can be formed between the upper polar plate and the lower polar plate, air in a cavity is ionized, an electrostatic field for enabling sand grains to move upwards is generated, the electrostatic field discharge is uniform, the sand grains are uniformly attached to a matrix core line, and therefore the uniformity of sand in the preparation process of the brazing wire saw is improved.
The projected area of the upper plate 40 in the vertical direction is equal to or greater than the projected area of the lower plate 50 in the vertical direction. That is, the width b1 of the upper electrode plate 40 and the width b2 of the lower electrode plate 50 are in a relationship of b1 being greater than or equal to b2, the upper electrode plate 40 and the lower electrode plate 50 generate an electrostatic field for upward movement of sand grains, so that all sand grains on the lower electrode plate 50 can be attached to the base core wire 30 after rising in the electrostatic field, and the length a1 of the upper electrode plate 40 and the length a2 of the lower electrode plate 50 are in a relationship of a1 being greater than or equal to a2, so that the upper electrode plate 40 can cover the rising path of the whole sand grains.
In order to prevent sand from scattering on unnecessary places in the falling process, a baffle 13 is fixedly connected above the peripheral leaks 12 on the left and right sides of the upper sand cavity 10, and the baffles 13 on the two sides respectively form blanking passages from the trough to the sand guide plates 11 on the corresponding sides of the sand guide plates 11.
The materials of the upper and lower plates 40 and 50 may be aluminum foil, copper foil, iron foil, or the like, which is a conductive metal foil.
The sand feeding operation of the matrix core wire 30 is a continuous sand feeding process driven by the routing mechanism, and the number of sand grains in the sand feeding cavity 10 is reduced along with the time so as to influence the uniformity of sand feeding, so that the sand feeding device disclosed by the invention leaks sand from the sand guide plate 11 on the sand feeding cavity 10 through the trough 20 to enter the sand feeding cavity 10 through the leak 12 for feeding, and sand grains enter the lower polar plate 50 in the sand feeding cavity 10 through the leak 12, and auxiliary blanking devices, such as vibration devices, can be respectively arranged on the trough 20 and the sand guide plate 11 to ensure continuous movement of the sand grains, so that the stability of uniform sand feeding is ensured, and the sand grains can be further ensured to be more uniformly distributed on the matrix core wire 10. When needed, the supplementary amount of sand grains can be controlled by controlling the auxiliary blanking device, so that the sand feeding amount is improved.
The substrate core wire 10 is uniformly coated with an adhesive agent on the surface of the substrate core wire 10 by an adhesive agent coating mechanism before sanding, so that sand grains can be effectively adhered to the substrate core wire 10 under the action of an electric field generated by the upper and lower polar plates 40 and 50 when the substrate core wire 10 passes through the upper sand cavity 10 along a wire path. The adhesive may be in the form of paste, liquid, etc., and is continuously and uniformly coated on the surface of the base core wire 10 by a special feeding mechanism. The direction of the sand particles moving and adhering in the electrostatic field is perpendicular to the running direction of the base core wire 10.
The amount of sand applied to the base core wire can also be controlled by controlling the electric field voltages on the upper and lower poles 40, 50 as desired.
The foregoing description is only illustrative of the preferred embodiments of the present invention, and therefore should not be taken as limiting the scope of the invention, for all changes and modifications that come within the meaning and range of equivalency of the claims and specification are therefore intended to be embraced therein.
Claims (5)
1. An electrostatic sanding device for braze wire saw preparation, characterized in that; the device comprises a cylindrical upper sand cavity, two material tanks used for discharging sand, a matrix core wire to be subjected to sand feeding and a wire feeding mechanism for driving the matrix core wire to move and wire, wherein the matrix core wire penetrates into the upper sand cavity from one axial end of the upper sand cavity through the wire feeding mechanism along the direction which coincides with the central axis of the upper sand cavity, and penetrates out of the upper sand cavity from the other axial end face of the upper sand cavity;
the inner wall of the upper sand cavity is provided with a plurality of bulge arrays at intervals along the circumferential direction, the bulge arrays are arranged symmetrically up and down and symmetrically left and right, the upper polar plate and the lower polar plate are correspondingly and tightly paved on the bulge arrays at the upper side and the lower side and form profiling bulges, so that tip discharge can be formed between the upper polar plate and the lower polar plate.
2. An electrostatic sanding device for use in the preparation of a brazed wire saw as in claim 1, wherein; the projection area of the upper polar plate in the vertical direction is equal to or larger than that of the lower polar plate in the vertical direction.
3. An electrostatic sanding device for use in the preparation of a brazed wire saw as in claim 1, wherein; a baffle is fixedly connected above the leaks of the peripheral body at the left side and the right side of the upper sand cavity respectively, and the baffles at the two sides and the sand guide plates at the corresponding sides form blanking channels from the trough to the sand guide plates respectively.
4. An electrostatic sanding device for use in the preparation of a brazed wire saw as in claim 1, wherein; the upper polar plate and the lower polar plate are made of conductive metal foil.
5. An electrostatic sanding device for use in the preparation of a brazed wire saw as in claim 1, wherein; the convex array and the sand feeding cavity are integrally formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210468197.6A CN114833735B (en) | 2022-04-29 | 2022-04-29 | Static sand feeding device for brazing wire saw preparation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210468197.6A CN114833735B (en) | 2022-04-29 | 2022-04-29 | Static sand feeding device for brazing wire saw preparation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114833735A CN114833735A (en) | 2022-08-02 |
| CN114833735B true CN114833735B (en) | 2023-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210468197.6A Active CN114833735B (en) | 2022-04-29 | 2022-04-29 | Static sand feeding device for brazing wire saw preparation |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104726923B (en) * | 2014-07-11 | 2017-03-08 | 青岛科技大学 | Sand device on a kind of stagewise electroplating diamond wire saw |
| CN204673491U (en) * | 2015-05-17 | 2015-09-30 | 惠州市瑞丰研磨材料有限公司 | A kind of electrostatic sand-planting machine |
| JP2019051586A (en) * | 2017-09-15 | 2019-04-04 | 株式会社Tkx | Wire rod for slice processing and manufacturing method thereof |
| CN207362352U (en) * | 2017-10-30 | 2018-05-15 | 长沙岱勒新材料科技股份有限公司 | The preparation facilities of diamond fretsaw |
| CN110605222A (en) * | 2019-10-14 | 2019-12-24 | 雷龙长 | Electrostatic sand planting structure for improving sand planting uniformity and electrostatic sand planting equipment thereof |
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- 2022-04-29 CN CN202210468197.6A patent/CN114833735B/en active Active
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