KR101432018B1 - Apparatus and method for grinding glass panel - Google Patents

Abstract

Disclosed are a glass panel grinding apparatus and a grinding method. The glass panel grinding apparatus for grinding multiple glass panels consecutively transferred in a sequence comprises a grinding part for processing a glass panel while pressing the glass panel at predetermined pressure; a pressure sensing part for measuring data on welding force of the grinding part with respect to the glass panel; a displacement sensing part for measuring data on displacement according to a change in the location of the grinding part; and a controlling part for controlling the extent of pressurization of the grinding part by receiving feedback on data from the pressure sensing part and the displacement sensing part. When at least two small glass panels are processed, a grinding wheel is capable of uniformly pressing the glass panel, so a uniform amount of grinding can be obtained.

Description

[0001] Apparatus and method for grinding glass panel [0002]

The present invention relates to a glass panel polishing apparatus and a polishing method.

A glass panel is processed and used as a substrate in the manufacturing process of an LCD (Liquid Crystal Display), an LED (Light Emitting Diode) display, a solar cell, etc. For this purpose, A step of polishing an edge portion subjected to polishing, and a step of inspecting an edge portion after polishing.

Conventionally, in order to polish a glass panel, the cut panel is loaded on a support table and the table is moved in a predetermined direction so that the edge of the panel passes through the grinding wheel, or a grinding wheel The edges of the panel were polished by bringing the polishing wheel into contact with the edge, and then the panel loaded on the table was unloaded.

However, in the conventional panel polishing process, defects such as chipping and micro cracks are generated on the cut surface (edge) of the glass panel, which has caused the strength of the glass panel to deteriorate.

Accordingly, there is a need to restore the stiffness of the glass panel to the original level after the polishing process, or to improve the stiffness to the original level, and a method of polishing the edge with a polishing wheel made of cerium oxide (CeO2) Respectively.

When such a wheel made of cerium oxide (CeO2) is used, a certain amount of pressure must be applied to the abrasive portion so that the effect can be obtained.

However, even in this process, vibration may occur in the glass panel due to contact with the wheel rotating at a high speed, and such vibration may further chipping or crack.

In addition, the polishing unit, which is processed while applying a predetermined pressure, has a tension structure in terms of inherent characteristics to be pressurized.

Unlike a hard grinding wheel that grinds conventional glass panels, a polishing cerium oxide (CeO2) wheel exhibits soft characteristics and is highly wear-resistant.

Therefore, the pressing structure of the polishing part also serves as a tool correcting device of the wheel.

Conventionally, there has been a problem in that such a grinding wheel is merely controlled by a pressure using a regulator, and thus responsiveness is slow.

When the responsiveness is low, a tensioned structure of the grinding portion makes a fine periodic motion like a spring in a direction perpendicular to the contact surface when the wheel and the panel are in contact with each other.

 As a result, a non-contact section occurs between the panel and the wheel, and this section causes a non-polishing phenomenon.

Further, in the course of sequentially polishing a plurality of glass panels, there arises a problem that the polishing wheel presses the stepped portion between the panel and the panel, thereby damaging the panel.

The above-described background technology is technical information that the inventor holds for the derivation of the present invention or acquired in the process of deriving the present invention, and can not necessarily be a known technology disclosed to the general public prior to the filing of the present invention.

Korean Patent Laid-Open Publication No. 10-2007-0117858 discloses a projection removing apparatus including a displacement sensor, a polishing tip, and an electronic pressure regulator. Korean Patent Laid-Open No. 10-2003-0078329 discloses a funnel for a cathode ray tube A polishing apparatus is disclosed.

Patent Document 1: Korean Patent Laid-Open No. 10-2007-0117858 Patent Document 2: Korean Patent Laid-Open No. 10-2003-0078329

SUMMARY OF THE INVENTION The present invention provides a polishing apparatus and a polishing method capable of preventing collision and breakage between a polishing wheel and a panel in polishing a plurality of glass panels.

It is another object of the present invention to provide an automatic tool correction function and a polishing apparatus and a polishing method capable of preventing a non-polishing phenomenon.

Other objects of the present invention will become readily apparent from the following description.

According to an aspect of the present invention, there is provided an apparatus for polishing a plurality of glass panels sequentially transferred successively, comprising: a polishing section for processing a glass panel while pressurizing the glass panel at a predetermined pressure; And a control unit for controlling the degree of pressing of the polishing unit by receiving feedback data from the pressure sensing unit and the displacement sensing unit, respectively, A glass panel grinding apparatus is provided.

The grinding unit may include a spindle, a drive unit for applying a force to the spindle in the direction of the glass panel, and an abrasive wheel coupled to the spindle at the end to polish the glass panel. Here, the grinding wheel may include a cerium oxide (CeO2) material to enhance the rigidity of the glass panel.

The pressure sensing unit may include a load cell installed in the driving unit to sense the degree of force applied by the driving unit. The displacement sensing unit may be installed in the driving unit and sense the degree of movement of the spindle by the force of the driving unit And a linear variable differential transformer (LVDT).

The control unit can control the polishing unit to move within a predetermined tolerance range in the direction of the glass panel, thereby preventing the polishing unit from colliding with the glass panel.

According to another aspect of the present invention, there is provided a method of manufacturing a glass panel, comprising the steps of: (a) sequentially transferring a plurality of glass panels sequentially, (b) applying a polishing portion to press the glass panel at a predetermined pressure, (c) (D) measuring data on the pressing force of the abrasive portion and data on displacement of the abrasive portion in accordance with a change in the position of the abrasive portion; and (d) A method for polishing a glass panel, comprising the steps of:

The grinding unit may include a spindle, a drive unit for applying a force to the spindle in the direction of the glass panel, and an abrasive wheel coupled to the spindle at the end to polish the glass panel.

The data concerning the pressing force is obtained by a load cell which is installed in the driving unit and senses the degree of the force by the driving unit. The data about the displacement is obtained by sensing the degree of movement of the spindle by the force of the driving unit, Lt; RTI ID = 0.0 > LVDT < / RTI >

Step (d) may include the step of causing the polishing section to maintain its position within a predetermined tolerance range based on the position of the glass panel.

Other aspects, features, and advantages will become apparent from the following drawings, claims, and detailed description of the invention.

According to the embodiment of the present invention, when machining two or more small glass panels, the grinding wheel can constantly press the glass panel, and an equal polishing amount can be obtained. In addition, since the protrusions of the panel generated intermittently are polished in such a manner that the polishing wheel smoothly rides over the panel, it is possible to prevent the panel from being broken at the protrusions.

In addition, it is possible to prevent the collision between the panel and the grinding wheel between the glass panels continuously inserted and the breakage of the panel, and it is possible to eliminate the non-contact section in the polishing process by the quick response and perform the automatic tool correction function, Can be prevented.

1 is a perspective view illustrating a glass panel polishing apparatus according to an embodiment of the present invention;
2 is a schematic view showing a structure of a glass panel polishing apparatus according to an embodiment of the present invention;
3 is a flowchart illustrating a method of polishing a glass panel according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Referring to the accompanying drawings, the same or corresponding components are denoted by the same reference numerals, .

FIG. 1 is a perspective view of a glass panel polishing apparatus according to an embodiment of the present invention, and FIG. 2 is a schematic view illustrating a structure of a glass panel polishing apparatus according to an embodiment of the present invention. 1 and 2, a glass panel 10, a polishing table 20, a polishing unit 100, a spindle 102, a driving unit 104, a polishing wheel 106, a load cell 110, an LVDT A control unit 120, and a control unit 130 are shown.

The present embodiment relates to a polishing amount control technique using pneumatic or electric motors. In the polishing mechanism for reinforcing the glass panel rigidity, a load cell and an LVDT are installed, and the measured pressure value and position value are fed back. A predetermined amount of polishing can be obtained by maintaining the reaction force at a position within a predetermined tolerance range and maintaining an appropriate position and load at a step between the panel and the panel to prevent collision between the panel and the grinding wheel and damage caused thereby.

The glass panel polishing apparatus according to the present embodiment is an apparatus for polishing a plurality of glass panels 10 which are placed on a polishing table 20 and are successively and sequentially transferred. The polishing apparatus 100 includes a polishing section 100, A displacement detection unit, and a control unit 130.

The polishing unit 100 is a processing apparatus for polishing the edge or surface of the glass panel 10 and performs processing (polishing) while pressing the glass panel 10 at a predetermined pressure.

The polishing unit 100 according to the present embodiment may be configured such that a polishing wheel 106 is coupled to the end of the spindle 102 as shown in Figure 2, An abrasive wheel for grinding the edge of the glass panel as well as an abrasive wheel for polishing the surface of the glass panel may be used.

In particular, among polishing wheels for polishing, an abrasive wheel can also be used to enhance the rigidity of the glass panel. In order to strengthen the rigidity of the glass panel, the abrasive wheel according to the present embodiment may be made of cerium oxide (CeO2).

The polishing section 100 according to the present embodiment can couple the drive unit 104 to the spindle 102 so that the polishing section 100 presses the glass panel 10 at a predetermined pressure. The drive unit 104 is a unit that can apply force to the spindle 102 in a pneumatic or electromotive manner as shown in Figure 2 and is driven by the actuation of the drive unit 104 to drive the spindle 102 The grinding wheel 106 coupled thereto) is urged in the direction of the glass panel 10 to be pressed against the glass panel 10 at a predetermined pressure.

The pressure sensing part is a component that serves to measure the force that the polishing part 100 presses the glass panel 10, that is, the pressing force.

For example, as shown in FIG. 2, the pressure sensing unit according to the present embodiment may be implemented in the form of a load cell 110 installed in the drive unit 104 and sensing the degree of force applied by the drive unit 104 .

The position of the polishing part 100 according to the present embodiment is changed by the force. The displacement sensing part is a component for measuring the degree of displacement of the polishing part 100, that is, the displacement.

For example, as shown in FIG. 2, the displacement sensing unit according to the present embodiment is installed in the drive unit 104, and senses the degree of displacement (displacement) of the spindle 102 by the force of the drive unit 104 And may be implemented in the form of an LVDT 120.

The control unit 130 receives data from the load cell 110 and the LVDT 120 to control the degree of pressing of the polishing unit 100, that is, the degree to which the driving unit 104 applies the spindle 102 And may be implemented in various forms such as a separate microprocessor or as a module in the polishing apparatus control unit.

By controlling the degree of pressing of the polishing unit 100 in the control unit 130 as described above, the polishing unit 100 according to the present embodiment can be controlled to move only within a predetermined tolerance range in the direction of the glass panel 10 , It is possible to prevent the polishing section 100 (specifically, the polishing wheel 106) from colliding with the glass panel 10 to be polished or from breaking the glass panel 10 during the polishing process .

3 is a flowchart illustrating a method of polishing a glass panel according to an embodiment of the present invention. Hereinafter, with reference to FIG. 3, a method of polishing a glass panel using the above-described polishing apparatus will be described.

First, two or more glass panels 10 are continuously fed into the polishing table 20 (S100), and the polishing wheel 106 mounted on the spindle 102 is rotated to perform polishing.

When the polishing is performed, the polishing wheel 100 is pressed to press the glass panel 10 at a predetermined pressure (S200).

The polishing wheel 106 may be a flexible wheel (e.g., a wheel of CeO2 material) having the purpose of enhancing the rigidity of the panel 10, and therefore, when a large clearance is generated between the panel and the panel relatively, There is a problem that the broken panel is stuck to the wheel.

The load cell 110 and the LVDT 120 are mounted on the drive unit 104 constituted by pneumatic or electric motors so as to adjust the pressure and the position in proportion to the amount of displacement of the polishing unit 100, The pressing force of the polishing unit 100 is measured by the load cell 110 and the displacement of the polishing unit 100 is measured by the LVDT 120 in operation S300.

The structure of the polishing section 100 (the spindle 102, the driving unit 104, the polishing abrasive wheel 106 for strengthening rigidity) is as described above. 2, the load cell 110 is mounted in such a manner as to support the load of the spindle 102 and the grinding wheel 106, so that the load applied to the panel 10 by the grinding unit 100 and the load applied to the panel 10 It is possible to measure the reaction force. Further, the LVDT 120 may be installed to measure the total displacement of the drive unit 104. [

As shown in FIG. 1, the polishing wheel 106 according to the present embodiment is turned obliquely to polish a panel having scribed panels or protrusions. In the polishing process, the pressure measured by the load cell 110 Values and the position values measured by the LVDT 120 are corrected to correct the pressure and the amount of displacement of the polishing unit 100 in real time so that the protruding polishing period (the gap between the panel and the panel, protrusions protruding on the panel, etc.) It can be gently polished.

That is, in the control unit 130 according to the present embodiment, the sensing value of the pressing force and displacement of the polishing unit 100 is fed back to adjust the pressing degree of the polishing unit 100 (S400). Accordingly, the polishing unit 100 according to the present embodiment performs polishing while maintaining its position within a predetermined tolerance range with reference to the position of the glass panel 10. [

For example, in a section where the reaction force does not act largely, such as the corner of the panel, the polishing wheel 106 is no longer pressed but polishing proceeds only within a specified tolerance range.

When the polishing of one panel 10 'is completed and a new panel 10 is put into a new polishing table 20, the polishing part moves relatively to the new position 100 from the previous position 100' In this process, the grinding wheel 106 is not infinitely pressed in the direction of the panel 10 (i.e., the grinding wheel 106 does not fall into the gap between the panel 10 and the panel 10 '), So that collision between the grinding wheel 106 and the new panel 10 can be prevented.

The glass panel polishing method according to the present embodiment feeds back the pressure value and the displacement value of the polishing section 100, respectively, so that the polishing wheel 106 (at the stepped portion between the panel and the panel) By maintaining a constant load, it is possible to prevent collision between the panel 10 and the grinding wheel 106, and to prevent breakage of the panel 10 and the grinding wheel 106.

That is, when the glass panel polishing method according to the embodiment is applied, the polishing unit 100 performs polishing while applying a certain pressure to the panel 10 with a predetermined reaction force value designated by the user.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that the invention may be varied and varied without departing from the scope of the invention.

10: Glass panel 20: Polishing table
100: abrading portion 102: spindle
104: drive unit 106: grinding wheel
110: load cell 120: LVDT
130:

Claims (10)

An apparatus for polishing a plurality of glass panels sequentially and successively transferred,
A grinding wheel coupled to a distal end of the spindle and a drive unit for applying a force to the spindle in the direction of the glass panel so that the grinding wheel is pressed against the glass panel at a predetermined pressure ;
A load cell installed in the drive unit for sensing a degree of the force of the drive unit to measure a pressing force of the grinding wheel with respect to the glass panel;
An LVDT (Linear Variable Differential Transformer) installed in the drive unit for measuring a displacement of the grinding wheel in the direction of the glass panel by sensing a degree of movement of the spindle by a force of the drive unit;
And a controller for controlling the degree of pressing of the grinding wheel so that the grinding wheel moves only within a predetermined tolerance range in the direction of the glass panel by receiving feedback data measured from the load cell and the LVDT,
Wherein the control unit controls the grinding wheel so that the grinding wheel is not separated from a gap between one of the glass panels and another glass panel adjacent to the one glass panel in the course of grinding a plurality of glass panels to be continuously transported, A glass panel polishing apparatus for preventing collision with a panel.
The method according to claim 1,
Wherein the grinding wheel comprises cerium oxide (CeO2) material and enhances the rigidity of the glass panel by polishing the glass panel.
delete delete delete delete A method for polishing a glass panel using the glass panel polishing apparatus according to claim 1,
(a) successively and sequentially transporting a plurality of glass panels;
(b) actuating the drive unit to apply force to the spindle such that the grinding wheel is pressed against the glass panel at a predetermined pressure;
(c) measuring the pressing force of the grinding wheel relative to the glass panel and the displacement of the grinding wheel in the direction of the glass panel; And
(d) adjusting the degree of pressurization of the grinding wheel so that the grinding wheel moves only within a predetermined tolerance in the direction of the glass panel, receiving feedback data measured in the step (c) A method of polishing a glass panel. delete delete delete

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