KR20160054120A - Polishing device using magneto-rheological fluid - Google Patents

Polishing device using magneto-rheological fluid Download PDF

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Publication number
KR20160054120A
KR20160054120A KR1020140152883A KR20140152883A KR20160054120A KR 20160054120 A KR20160054120 A KR 20160054120A KR 1020140152883 A KR1020140152883 A KR 1020140152883A KR 20140152883 A KR20140152883 A KR 20140152883A KR 20160054120 A KR20160054120 A KR 20160054120A
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KR
South Korea
Prior art keywords
polishing
glass
wheel
magnetic field
unit
Prior art date
Application number
KR1020140152883A
Other languages
Korean (ko)
Inventor
조명우
하석재
이정원
조용규
김병찬
강이룩
Original Assignee
인하대학교 산학협력단
Priority date (The priority date 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 date listed.)
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Application filed by 인하대학교 산학협력단 filed Critical 인하대학교 산학협력단
Priority to KR1020140152883A priority Critical patent/KR20160054120A/en
Publication of KR20160054120A publication Critical patent/KR20160054120A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
    • B24B1/005—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes using a magnetic polishing agent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B37/00—Lapping machines or devices; Accessories
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B57/00—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents
    • B24B57/02—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents for feeding of fluid, sprayed, pulverised, or liquefied grinding, polishing or lapping agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B57/00—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents
    • B24B57/04—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents for feeding of solid grinding, polishing or lapping agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
    • B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
    • B24B9/08—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
    • B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
    • B24B9/06—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain
    • B24B9/08—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass
    • B24B9/10—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of non-metallic inorganic material, e.g. stone, ceramics, porcelain of glass of plate glass

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

The present invention relates to an apparatus for polishing an edge of a glass supported by a workpiece supporting portion by a magnetorheological fluid polishing method, comprising: a polishing wheel having a cylindrical shape and a polishing groove formed along the side surface; A driving unit for rotating the grinding wheel; A transporting unit that moves the glass supported by the support unit in the left-right direction or the back-and-forth direction and transfers the glass to the polishing groove of the polishing wheel; A fluid supply part for supplying a magnetorheological fluid to the polishing groove at a constant thickness; A magnetic field forming unit for forming a magnetic field on the grinding wheel; A polishing slurry supply unit for supplying polishing slurry to the polishing slurry; And a polishing slurry recovering portion for recovering the polishing slurry used for edge polishing of the glass, wherein the edge of the glass is in contact with the inner circumferential surface of the polishing groove and is polished.
An edge portion of a glass can be polished by a magnetorheological fluid method. An edge portion of a glass is polished by a magnetorheological fluid method using an abrasive wheel having a polishing groove formed on a side thereof. Thus, an abrasive tool It is not necessary to rotate the glass or transfer the glass.

Description

[0001] The present invention relates to a polishing apparatus using magneto-rheological fluid,

The present invention relates to a magnetorheological fluid polishing apparatus, and more particularly, to a magnetorheological fluid polishing apparatus capable of precision grinding without rotation and transfer of an abrasive tool and minimizing surface defects during a polishing operation.

In recent years, there has been an increasing demand for cover glasses and LCD panels used for protection in displays, and touch screen panels used as input devices mounted above the display area. Also, an integrated touch capable of performing functions of cover glass and touch screen Demand for panels is also increasing.

After the completion of the panel, the integrated touch panel is completed by performing cutting and grinding processes in accordance with the size of the display to be used. Here, the grinding process is a process for removing the concave and convex portions of the panel surface and obtaining a smooth surface. An example of the above grinding process is disclosed in Korean Patent Publication No. 2006-0095920.

Currently, the main processing method used in the grinding process of the panel is a grinding process using a grinding wheel, but cracks and chips are generated on the surface and edge of the glass, There is a problem that fine particles are generated.

In order to solve the above problem, a technique of grinding a touch panel by a polishing system using magneto-rheological fluids (MR fluids) has been disclosed.

The magnetorheological fluid polishing system can achieve a high-quality polishing process by controlling the concentration of the fluid by electromagnetically changing the stress and shear force, thereby controlling the aerodynamic force and eliminating contact between the tool and the workpiece. An example of a magnetorheological fluid polishing system is disclosed in Korean Patent No. 0793409.

In the conventional magnetorheological fluid polishing system disclosed in the above-mentioned prior art, it can be seen that the wheel member used in the grinding process has a flat side surface.

Therefore, during the edge polishing of the integral panel, the polishing operation is performed for each of the two side edges of the edge, which increases the working time. It is necessary to solve this problem because the increase of the work time and the work process increases the probability of occurrence of cracks and chips in the workpiece.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a magnetorheological fluid polishing apparatus which polishes edge portions of a glass by a magnetorheological fluid method.

In addition, the present invention relates to a method for polishing an edge portion of a glass using a grinding wheel having a polishing groove formed on a side surface thereof in a magnetorheological fluid manner, It is an object of the present invention to provide a fluid polishing apparatus.

According to an aspect of the present invention, there is provided an apparatus for polishing an edge of a glass supported by a workpiece supporting member by a magnetorheological fluid polishing method, the apparatus comprising: a polishing wheel having a cylindrical shape, ; A driving unit for rotating the grinding wheel; A transporting unit that moves the glass supported by the support unit in the left-right direction or the back-and-forth direction and transfers the glass to the polishing groove of the polishing wheel; A fluid supply part for supplying a magnetorheological fluid to the polishing groove at a constant thickness; A magnetic field forming unit for forming a magnetic field on the grinding wheel; A polishing slurry supply unit for supplying polishing slurry to the polishing slurry; And a polishing slurry recovering portion for recovering the polishing slurry used for edge polishing of the glass, wherein the edge of the glass is in contact with the inner circumferential surface of the polishing groove and is polished.

The width of the polishing groove may be larger than the thickness of the glass.

The depth of the polishing groove may correspond to the width.

The magnetic field forming portion may include a core portion having a pair of arms connected at one end to each other and disposed at both ends of the grinding wheel, and an electromagnet disposed in the arm and generating a magnetic field.

The electromagnets may have the same degree of magnetic field generation.

The fluid supply unit and the polishing slurry collecting unit may be disposed opposite to both sides of the polishing wheel.

In the present invention as described above, the edge portion of the glass can be polished by the magnetorheological fluid method.

Further, according to the present invention, since the edge portion of the glass is polished by the magnetorheological fluid method using the grinding wheel having the polishing groove on the side, the rotation of the polishing tool or the transferring process of the glass is not required for edge polishing of the glass.

1 is a view schematically showing a configuration of a magnetorheological fluid polishing apparatus according to an embodiment of the present invention.
2 is a perspective view showing an example of a magnetorheological fluid polishing apparatus according to an embodiment of the present invention.
Fig. 3 is a view showing the arrangement state of a polishing wheel, a fluid supply unit, and a polishing slurry recovery unit used in the present invention.
4 is a cross-sectional view taken along the line AA in Fig.
5 is a view showing a state in which the edge of the glass is polished.
Figs. 6 and 7 are diagrams showing the magnetic field distribution applied to the grinding wheel used in the present invention. Fig.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic view showing the construction of a magnetorheological fluid polishing apparatus according to an embodiment of the present invention, and FIG. 2 is a perspective view showing an example of a magnetorheological fluid polishing apparatus according to an embodiment of the present invention.

Referring to FIGS. 1 and 2, a magnetorheological fluid polishing apparatus 100 according to an embodiment of the present invention includes a polishing wheel 110, a driving unit 120, a magnetic field forming unit 130, a fluid supply unit 140, A polishing slurry supplying unit 150 and a polishing slurry collecting unit 160. [

The grinding wheel 110 polishes the edge of the glass 1, which is the workpiece, so that the edges of the glass 1 are oblique. The polishing wheel 110 is formed in a cylindrical shape having a predetermined diameter and a predetermined length. A polishing groove 112 is formed on the side surface of the polishing wheel 110 so that the edge of the glass 1 can be inserted and polished.

Here, the polishing groove 112 may be formed in a groove shape along the side surface middle portion of the polishing wheel 110.

The polishing groove 112 may be formed in an arc shape whose cross section has a predetermined curvature. In addition, the polishing groove 112 may have a triangular shape in cross section.

The width of the polishing groove 112 is preferably larger than the thickness of the glass 1 to be worked. The depth of the polishing groove 112 corresponds to the width of the polishing groove 112 so that the edge of the glass 1 can sufficiently contact the inner surface of the polishing groove 112 at the time of polishing the glass 1 .

The driving unit 120 is connected to the grinding wheel 110 so that the grinding wheel 110 is rotated at a predetermined speed set by the user.

The driving unit 120 may be a motor operated by an external power source. 1, the drive unit 120 can be directly coupled to the center axis of the grinding wheel 110 as shown in FIG. 1, but a power transmission element such as a gear, a drive pulley, and a drive belt is interposed .

It is preferable that the driving unit 120 is firmly supported by a predetermined structure so that no shaking occurs during operation.

The magnetic field forming portion 130 forms a magnetic field with respect to the grinding wheel 110. The magnetic field forming portion 130 includes a core portion 132 and a pair of electromagnets 134.

The core 132 is applied with a magnetic field generated by an electromagnet 134 to be described later so that a magnetic field can be applied to the grinding wheel 110.

The core portions 132 are composed of a pair of arms arranged parallel to each other, one end of which is connected to the other end, and the other end of which is connected to both ends of the rotation axis of the polishing wheel 110. The core 132 may be formed in a 'C' shape.

The electromagnets 134 may be disposed respectively in the arms constituting the core portion 132. [ It is preferable that the electromagnets 134 disposed in the arms have the same size and shape and the same degree of magnetic field generation.

The electromagnet 134 generates a predetermined magnetic field when power is applied from the outside, and may apply the electromagnet 134 to the grinding wheel 110 through the core 132.

Here, the configuration for generating the magnetic field in the electromagnet 134 is well-known in the art, and a detailed description thereof will be omitted.

The fluid supply portion 140 is disposed adjacent to the polishing wheel 110 to supply magneto-rheological fluids (MR fluid) to the polishing groove 112 of the polishing wheel 110. The fluid supply part 140 always supplies a uniform amount of magnetorheological fluid to the polishing groove 112 during the course of the operation so that the magnetorheological fluid has a constant thickness.

To this end, the fluid supply 140 may include a magnetorheological fluid supply pump 142, a magnetorheological fluid supply nozzle 144,

Magneto-rheological fluids (MR fluids) have a characteristic that their viscosity changes when a magnetic field is applied. Generally, non-magnetic fluids such as oil and water are coated with a magnetic material CI (Carbonyl iron) particles can be applied as a material in which flow characteristics are controlled in real time according to the strength of a magnetic field. The CI particles are produced when the iron pentacarbonyl is decomposed and are in the form of sphere and generally have a diameter of 2 to 6 μm and are mixed with non-magnetic polishing particles, .

The fluid supply part 140 preferably supplies the magnetorheological fluid after the magnetic field is formed by the magnetic field forming part 130.

The polishing slurry supply part 150 is disposed close to the polishing wheel 110 and supplies polishing slurry to the magnetorheological fluid supplied to the polishing wheel 110.

The polishing slurry supply unit 150 may include a slurry supply pump 152 and a slurry spray nozzle 154.

Here, the polishing slurry generally includes abrasive grains used in a polishing apparatus, and the abrasive grains may be cerium oxide, diamond powder, or the like to improve the material removal rate and polishing performance in the fine polishing process. Non-magnetic abrasive such as Al2O3 particles.

Further, the polishing slurry supply unit 150 can remove the polishing slurry after the polishing process is completed.

FIG. 3 is a view showing an arrangement state of a polishing wheel, a fluid supply unit, and a polishing slurry recovery unit used in the present invention, and FIG. 4 is a sectional view taken along the line A-A of FIG.

The polishing slurry collection unit 160 recovers the polishing slurry remaining on the polishing grooves 112 after the polishing process is completed.

The used polishing slurry is distributed on the magnetorheological fluid on the polishing groove 112. The polishing slurry is distributed not mixed with the magnetorheological fluid.

The polishing slurry collection unit 160 can collect the polishing slurry distributed on the magnetorheological fluid using the suction force generated from the external suction pump. The recovered polishing slurry can be reused.

The polishing slurry collection unit 160 is preferably disposed opposite to the fluid supply unit 140 with respect to the central axis of the polishing wheel 110.

In order to facilitate the slurry collection operation by the polishing slurry collection unit 160, the polishing wheel 110 is preferably rotated counterclockwise in FIG.

Hereinafter, the operation of the present invention will be described.

2 is a perspective view showing an example of a magnetorheological fluid polishing apparatus according to an embodiment of the present invention.

The glass 1 as a work object is supported so as not to cause a problem such as shaking due to external force during the progress of the grinding operation and can be brought close to the grinding wheel 110 by the transferring portion 10 having a predetermined configuration. Further, after the work is completed, the transfer unit 10 can make the cover glass 1 to be spaced apart from the grinding wheel 110.

The transfer unit 10 is brought close to the polishing wheel 110 in a state where the cover glass 1 as a workpiece is supported and fixed.

3 and 4, when the cover glass 1 is in proximity to the grinding wheel 110, power is applied to the electromagnet 134 to generate a magnetic field, which is transmitted through the core 132 to the grinding wheel 110 So that the magnetic field can be applied.

In a state in which the magnetic field is applied, the fluid supply part 140 supplies a predetermined amount of magnetorheological fluid so that the magnetorheological fluid is laminated on the polishing groove 112 at a constant thickness. Thereafter, the polishing slurry is uniformly supplied to the magnetorheological fluid phase of the polishing groove 112 through the slurry spray nozzle 154 of the polishing slurry supply unit 150.

5 is a view showing a state in which the edge of the glass 1 is polished by the polishing groove 112. The magnetorheological fluid 2 is supplied to the polishing wheel 110 through the fluid supply part 140, The polishing slurry 3 is supplied through the supply part 150 to the magnetorheological fluid, and the polishing proceeds to the edge of the cover glass.

As shown in the figure, both sides of the edge of the glass 1 are abraded by being in contact with the inner circumferential surface of the polishing groove 112.

Figs. 6 and 7 are diagrams showing the magnetic field distribution applied to the grinding wheel used in the present invention. Fig.

Referring to FIGS. 6 and 7, it can be seen that the magnetic field is uniform with respect to the polishing groove 112 of the polishing wheel 110.

The polishing slurry used in the edge polishing of the glass is in a state in which the glass is ground and the particle size is reduced. Since the particle size is reduced and the degree of polishing becomes smaller, it is necessary to recover the used polishing slurry and to supply a new polishing slurry so that the polishing of the glass is continuously performed.

The polishing slurry collection unit 160 preferably recovers the polishing slurry used for polishing by using a suction force.

Since the edge portion of the glass can be polished by the magnetorheological fluid method and the edge portion of the glass is polished by the magnetorheological fluid method using the polishing wheel having the polishing groove formed on the side thereof, It is not necessary to rotate the polishing tool or transfer the glass.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100: Magneto-rheological fluid polishing apparatus
110: Grinding wheel
120:
130: magnetic field forming part
140:
150: polishing slurry supply part
160: polishing slurry collection unit

Claims (6)

An apparatus for polishing an edge of a glass supported by a workpiece support by a magnetorheological fluid polishing method,
A polishing wheel having a cylindrical shape and a polishing groove formed along a circumference of the polishing pad;
A driving unit for rotating the grinding wheel;
A transporting unit for moving the glass supported by the supporting unit in the left-right direction or the back-and-forth direction and transferring the glass to the polishing groove of the polishing wheel;
A fluid supply part for supplying a magnetorheological fluid to the polishing groove at a constant thickness;
A magnetic field forming unit for forming a magnetic field on the grinding wheel;
A polishing slurry supply unit for supplying polishing slurry to the polishing slurry;
A polishing slurry collecting unit for collecting the polishing slurry used for edge polishing of the glass;
Lt; / RTI >
Wherein the edge of the glass is in contact with the inner peripheral surface of the polishing groove and is polished. The method according to claim 1,
Wherein the width of the polishing groove is larger than the thickness of the glass. 3. The method of claim 2,
And the depth of the polishing groove corresponds to the width. The method according to claim 1,
The magnetic field-
A core portion having one end connected to each other and the other end disposed at both ends of the polishing wheel;
And an electromagnet disposed in the arm and generating a magnetic field, respectively. 5. The method of claim 4,
Wherein the electromagnets have the same degree of magnetic field generation. The method according to claim 1,
Wherein the fluid supply portion and the polishing slurry collecting portion are disposed opposite to both sides of the polishing wheel.
KR1020140152883A 2014-11-05 2014-11-05 Polishing device using magneto-rheological fluid KR20160054120A (en)

Priority Applications (1)

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KR1020140152883A KR20160054120A (en) 2014-11-05 2014-11-05 Polishing device using magneto-rheological fluid

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Application Number Priority Date Filing Date Title
KR1020140152883A KR20160054120A (en) 2014-11-05 2014-11-05 Polishing device using magneto-rheological fluid

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110340745A (en) * 2019-07-18 2019-10-18 浙江科惠医疗器械股份有限公司 It is ceramic-lined in a kind of metal acetabulum to use magnetorheological polishing machine
CN113814870A (en) * 2021-09-29 2021-12-21 中国工程物理研究院机械制造工艺研究所 Method for measuring and calculating pose of magnetorheological polished workpiece and polishing method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110340745A (en) * 2019-07-18 2019-10-18 浙江科惠医疗器械股份有限公司 It is ceramic-lined in a kind of metal acetabulum to use magnetorheological polishing machine
CN113814870A (en) * 2021-09-29 2021-12-21 中国工程物理研究院机械制造工艺研究所 Method for measuring and calculating pose of magnetorheological polished workpiece and polishing method
CN113814870B (en) * 2021-09-29 2022-10-04 中国工程物理研究院机械制造工艺研究所 Method for measuring and calculating pose of magnetorheological polished workpiece and polishing method

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