KR20110132655A - Stage for measuring strength of flat glass and appratus for measuring strength of flat glass having the stage - Google Patents

Stage for measuring strength of flat glass and appratus for measuring strength of flat glass having the stage Download PDF

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Publication number
KR20110132655A
KR20110132655A KR1020100052102A KR20100052102A KR20110132655A KR 20110132655 A KR20110132655 A KR 20110132655A KR 1020100052102 A KR1020100052102 A KR 1020100052102A KR 20100052102 A KR20100052102 A KR 20100052102A KR 20110132655 A KR20110132655 A KR 20110132655A
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KR
South Korea
Prior art keywords
flat glass
glass
support
needle
strength
Prior art date
Application number
KR1020100052102A
Other languages
Korean (ko)
Inventor
김병용
박상철
서대식
Original Assignee
연세대학교 산학협력단
태경하이텍(주)
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 연세대학교 산학협력단, 태경하이텍(주) filed Critical 연세대학교 산학협력단
Priority to KR1020100052102A priority Critical patent/KR20110132655A/en
Publication of KR20110132655A publication Critical patent/KR20110132655A/en

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/20Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/003Generation of the force
    • G01N2203/0032Generation of the force using mechanical means
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02Details not specific for a particular testing method
    • G01N2203/026Specifications of the specimen
    • G01N2203/0262Shape of the specimen
    • G01N2203/0278Thin specimens
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02Details not specific for a particular testing method
    • G01N2203/04Chucks, fixtures, jaws, holders or anvils

Abstract

PURPOSE: A support for a strength measuring device of a flat glass and a strength measuring device of a flat glass therewith are provided to accurately measure the strength of a glass by preventing a needle from slipping. CONSTITUTION: A support(180) for a strength measuring device of a flat glass is formed in a ring shape and comprises a top surface unit, an inner surface unit, and an outer surface unit. The top surface unit is flat. A flat glass(160) is loaded on the top surface unit. The inner and outer surface units are connected to the top surface unit.

Description

Support for strength measuring apparatus of flat glass and flat glass strength measuring apparatus provided with the same TECHNICAL FIELD
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support for supporting flat glass, which is used in an apparatus for measuring the strength of flat glass, and a flat glass strength measuring apparatus having the same.
Flat glass or glass plates or glass substrates are used in various fields such as display panels. The flat glass used for the display panel may be processed to a predetermined thickness and then assembled with other components. For example, in manufacturing an LCD display panel, it may be slimmed to a thin thickness before or after panel assembly. Such flat glass is thin and requires strength (or breaking strength) above a certain strength. In particular, when the LCD display device is used in a product having high portability or mobility, the LCD display device may be frequently exposed to a condition or environment that will be damaged due to physical impact or pressure from an external device, or inadvertent dropping by a user. In LCD display devices, the strength of flat glass used in panels plays an important role in terms of product reliability and durability.
In order to confirm durability of the flat glass before or after assembly, the strength of the flat glass is measured. 1 is a cross-sectional view illustrating a conventional plate glass strength measurement technique, and FIG. 2 is a plan view related to FIG. 1. 1 and 2, to measure the strength of the flat glass 60, the flat glass 60 is placed on the straight support 80. This support 80 is a set of two members spaced apart in parallel to each other. A force F is applied while the tip is moved downward by using a rounded needle 50 to contact the flat glass 60. In FIG. 2, reference numeral 55 denotes a contact point between the needle 50 and the flat glass 60. By the force applied by the needle 50, the force is continuously applied until the flat glass 60 is bent and the flat glass 60 is broken as shown in FIG. In this case, the strength of the flat glass 60 can be measured from the force (or stress) applied by the needle 50 until the glass breaks.
In the above-described conventional flat glass strength measurement method, when the possibility of breakage occurs, in FIG. 2, sufficient support by the support 80 among the four side surfaces A, B, C, and D of the flat glass 60 is shown. Destruction proceeds by cracks CR present on the side surfaces B and D that do not receive, that is, on the side surfaces B and D in which the support 80 is not disposed. This is caused by the minute cracks or cracks on the surfaces B and D which are not supported by the support 80, rather than by the strength of the glass itself. In this case, the fracture strength is measured by abrasion treatment or rounding of the cross-sectional edges of the plate glass 60, and thus, even when the same plate glass specimen is used, the measured fracture strength is highly varied.
Embodiments of the present invention provide a support for a plate glass measuring apparatus that enables more accurate measurement of the strength of the glass itself, regardless of whether the cross-sectional edge of the plate glass is worn out. In addition, an embodiment of the present invention provides a flat glass measuring apparatus having a support for more accurately measuring the strength of the glass itself, regardless of whether the cross-sectional edge of the flat glass wear.
The support for a plate glass measuring apparatus according to the embodiment of the present invention has a ring shape having an upper surface portion on which the flat glass is mounted, an inner surface portion and an outer surface portion connected to the upper surface portion. The upper surface portion of the support may be a flat surface. The inner surface portion and the outer surface portion of the support may be perpendicular to the upper surface portion of the support, and the lower surface portion of the support may be parallel to the upper surface portion of the support.
According to an aspect of the present invention, there is provided a flat glass measuring apparatus comprising: a support having a ring shape having an upper surface portion on which the flat glass is mounted, an inner surface portion and an outer surface portion connected to the upper surface portion; A needle contacting the plate glass mounted on the support to apply force to the plate glass; A driver for driving the movement of the needle; A sensor unit for detecting a force or stress applied to the flat glass by the drive unit; And an intensity measuring unit for measuring the strength of the flat glass from the force or stress detected by the sensor unit.
The flat glass measuring apparatus may further include a display unit displaying a force or a stress detected by the sensor unit.
The needle may be formed of glass. In particular, the end of the needle which is in contact with the flat glass may be formed of glass. The needle or the end of the needle may be formed of the same material as the flat glass to be measured.
According to the embodiment of the present invention, the measurement strength of the flat glass is advantageously able to accurately measure the strength of the flat glass only by the strength of the glass itself, without being affected by cracks or cracks at the edges. In addition, by using the needle or the end of the needle made of the same material as the glass material or the flat glass to be measured, it is possible to prevent the slip of the needle during measurement and to measure the breaking strength more accurately.
1 is a schematic cross-sectional view for explaining a conventional plate glass strength measurement technique.
2 is a schematic plan view for explaining a conventional plate glass strength measurement technique.
Figure 3 is a schematic cross-sectional view showing a state where the plate glass is bent in the conventional plate glass strength measurement.
4 is a plan view of a support for a plate glass strength measuring apparatus according to an embodiment of the present invention.
5 is a cross-sectional view of the support of FIG.
FIG. 6 is a plan view illustrating a state in which a measurement target plate glass is mounted on a support of FIG. 4; FIG.
7 is a diagram schematically showing a configuration of a flat glass strength measuring device according to an embodiment of the present invention.
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, the embodiments of the present invention may be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. Shapes and sizes of the elements in the drawings may be exaggerated for clarity, elements denoted by the same reference numerals in the drawings are the same elements.
4 is a plan view showing a support used in the flat glass strength measuring apparatus according to an embodiment of the present invention, Figure 5 is a cross-sectional view of the support of FIG. 4 and 5, the support 180 has a ring shape. Specifically, the support base 180 includes an upper surface portion S1 on which flat glass (for example, a specimen of an LCD panel glass substrate) is mounted, an inner surface portion S3 connected to the upper surface portion S1, and It has outer side surface part S2, and has a circular ring shape as a whole. However, the present invention is not limited thereto, and for example, the support may be made in a ring shape of an elliptical shape or a polygonal shape (such as hexagonal or octagonal) rather than circular.
As shown in the cross-sectional view of FIG. 5, the upper surface portion S1 of the ring-shaped support 180 is a flat plane, and the inner surface portion S3 and the outer surface portion S2 connected to the upper surface portion S1 are the upper surface. It may be made of a curved surface perpendicular to the portion (S1). The lower surface portion opposite to the upper surface portion S1 may be formed in a plane parallel to the upper surface portion S1. The flat glass to be measured is placed on the upper surface portion S1 of the support 180 having such a shape.
FIG. 6 is a plan view showing a state where the measurement target flat glass 160 is placed using the support 180 having the shape as described above. As shown in FIG. 7, with the flat glass 160 placed on the support 180, the end 151 may be forced downward as the rounded push rod or needle 150 is placed on the flat glass 160. While applying F), the force or stress applied to the plate glass 160 is sensed, and the strength of the plate glass is measured from the force or stress sensed in the event of breakage or a certain degree of deformation (especially warpage).
When measuring the strength of the flat glass 160 using the support 180 having the shape or configuration as described above, unlike when using two conventional straight support members (see FIGS. 1 to 3), the measurement target plate It is possible to accurately measure the strength of the flat glass only by the strength of the glass itself without being substantially affected by the cracking of the edge (or side) portion of the glass. That is, since any side of the plate glass 160 is supported by the support 180, the cracks on the side (or edge) of the plate glass 160 are measured when the plate glass strength is measured by the force applied by the needle. Less or less affected by it.
7 is a view schematically showing a flat glass measuring apparatus according to an embodiment of the present invention. Referring to FIG. 7, the flat glass measuring apparatus 500 includes a support 180 according to the above-described embodiment. That is, the support stand 180 has a ring shape having an upper surface portion on which the measurement target flat glass 160 is mounted, and an inner surface portion and an outer surface portion connected to the upper surface portion.
The flat glass measuring apparatus 500 also includes a needle 150 for applying a force to the flat glass 160 mounted on the support 180. The needle 150 may be driven by the driving unit 210 to move up and down. In particular, when the strength of the flat glass 160 is measured, the needle 150 descends downward (toward the flat glass) and contacts the flat glass 160 so as to contact the flat glass 160. Force F). For strength measurement, such as breaking strength, the force applied to the plate glass 160 after contact with the needle 150 gradually increases, and the force is continuously applied until the plate glass 160 undergoes a certain deformation or breaks. .
The driving unit 210 drives the movement of the needle, in particular, the up and down movement, and the driving force or the moving speed of the needle applied to the needle 150 by a predetermined control device or controller (not shown) is controlled or adjusted.
The sensor unit 230 may include, for example, a load cell or the like, and detects a force or a stress applied to the flat glass 160 by the needle 150 by the driving unit 210. The force or stress detected by the sensor unit 230 may be displayed to a user or a driver through the display unit 270 connected to the sensor unit 230.
The strength measuring unit 250 measures the strength of the flat glass from the force or stress detected by the sensor unit 230. For example, when the sensor unit 230 detects a predetermined degree of deformation or breakage of the flat glass 160, the strength measuring unit 250 senses the needle 150 sensed by the sensor unit 230 until then. The strength or fracture strength of the flat glass 160 may be measured using the applied force or stress information. The breaking strength thus measured may also be displayed on the display unit 270.
As described above, the flat glass measuring apparatus 500 uses the support 180 according to the embodiment, in a state of minimizing the influence on the strength measurement due to cracks formed at the corners or sides of the flat glass 160. The strength of the glass itself can be measured accurately.
An end portion of the needle 150 exerting a force on the flat glass 160 when measuring strength is typically rounded. As the end of the needle 150 continues to apply force to the plate glass 160, the needle 150 is lowered to the plate glass 160 until deformation of the plate glass 160 begins and breakage occurs around the circular contact surface. The magnitude of the downward pressure will continue to increase. At this time, when the needle 150 is made of a material other than glass, such as steel, when the needle 150 is in contact with the flat glass 160, the needle 150 due to the elasticity of different materials (needle material and flat glass material) Slip of 150 may occur. The sliding of the needle 150 may cause a slight error in strength measurement. In order to prevent the needle slip, it is possible to use a needle 150 made of a glass material. Alternatively, the end portion 151 of the needle actually contacting the flat glass 160 may be formed of glass. By forming the needle or the end of the needle with glass, slippage of the needle 150 can be prevented and the flat glass strength can be measured more accurately. In particular, by using the needle 150 or the end 151 of the needle as the material of the same material as the flat glass to be measured, the needle 150 can be prevented from slipping.
The present invention is not limited by the above-described embodiment and the accompanying drawings. It is intended that the scope of the invention be defined by the appended claims, and that various forms of substitution, modification, and alteration are possible without departing from the spirit of the invention as set forth in the claims. Will be self-explanatory.
150: needle 151: end of the needle
S1: upper surface portion S2: outer surface portion
S3: inner side part 160: flat glass
180: support 210: drive unit
230: sensor unit 250: strength measuring unit
270: display unit

Claims (8)

  1. A support for a flat glass measuring apparatus having a ring shape having an upper surface portion on which the flat glass is mounted, and an inner surface portion and an outer surface portion connected to the upper surface portion.
  2. The method of claim 1,
    The upper surface portion of the support is a support for a flat glass measuring device, characterized in that the flat surface.
  3. The method of claim 1,
    The inner surface portion and the outer surface portion of the support is at a right angle to the upper surface portion of the support, the lower surface portion of the support is a support for a flat glass measuring device, characterized in that the surface parallel to the upper surface portion of the support.
  4. A support having a ring shape having an upper surface portion on which the flat glass is mounted, an inner surface portion and an outer surface portion connected to the upper surface portion;
    A needle contacting the plate glass mounted on the support to apply force to the plate glass;
    A driver for driving the movement of the needle;
    A sensor unit for detecting a force or stress applied to the flat glass by the drive unit; And
    Flat glass strength measuring device comprising a strength measuring unit for measuring the strength of the flat glass from the force or stress detected by the sensor unit.
  5. The method of claim 4, wherein
    And a display unit for displaying the force or stress applied to the flat glass by the needle, detected by the sensor unit.
  6. The method of claim 4, wherein
    And the needle is formed of glass.
  7. The method of claim 4, wherein
    An end portion of the needle in contact with the flat glass is formed of glass, characterized in that the glass.
  8. The method of claim 4, wherein
    The needle or the end of the needle is formed of the same material as the flat glass to be measured, flat glass strength measuring apparatus.
KR1020100052102A 2010-06-03 2010-06-03 Stage for measuring strength of flat glass and appratus for measuring strength of flat glass having the stage KR20110132655A (en)

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Application Number Priority Date Filing Date Title
KR1020100052102A KR20110132655A (en) 2010-06-03 2010-06-03 Stage for measuring strength of flat glass and appratus for measuring strength of flat glass having the stage

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Application Number Priority Date Filing Date Title
KR1020100052102A KR20110132655A (en) 2010-06-03 2010-06-03 Stage for measuring strength of flat glass and appratus for measuring strength of flat glass having the stage

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KR20110132655A true KR20110132655A (en) 2011-12-09

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140139375A (en) * 2013-05-27 2014-12-05 엘지디스플레이 주식회사 Inspection apparatus for liquid crystal display device module
CN104949889A (en) * 2015-06-12 2015-09-30 郑州磨料磨具磨削研究所有限公司 Whole flexural testing method and device of ultrathin grinding wheel
KR20160116379A (en) * 2015-03-30 2016-10-10 주식회사 중앙정밀 Multi-position stiffness test apparatus of flat glass
CN106680108A (en) * 2016-11-24 2017-05-17 惠科股份有限公司 Method and device for bending test of display panel

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140139375A (en) * 2013-05-27 2014-12-05 엘지디스플레이 주식회사 Inspection apparatus for liquid crystal display device module
KR20160116379A (en) * 2015-03-30 2016-10-10 주식회사 중앙정밀 Multi-position stiffness test apparatus of flat glass
CN104949889A (en) * 2015-06-12 2015-09-30 郑州磨料磨具磨削研究所有限公司 Whole flexural testing method and device of ultrathin grinding wheel
CN106680108A (en) * 2016-11-24 2017-05-17 惠科股份有限公司 Method and device for bending test of display panel

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