KR101680843B1 - Glass cutting apparatus with laser beam - Google Patents

Glass cutting apparatus with laser beam Download PDF

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Publication number
KR101680843B1
KR101680843B1 KR1020150061796A KR20150061796A KR101680843B1 KR 101680843 B1 KR101680843 B1 KR 101680843B1 KR 1020150061796 A KR1020150061796 A KR 1020150061796A KR 20150061796 A KR20150061796 A KR 20150061796A KR 101680843 B1 KR101680843 B1 KR 101680843B1
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KR
South Korea
Prior art keywords
bed
laser
glass
axis
laser head
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KR1020150061796A
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Korean (ko)
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KR20160130024A (en
Inventor
정근섭
류영찬
박은봉
윤동한
Original Assignee
(주)에이스이노테크
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Priority to KR1020150061796A priority Critical patent/KR101680843B1/en
Publication of KR20160130024A publication Critical patent/KR20160130024A/en
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Publication of KR101680843B1 publication Critical patent/KR101680843B1/en

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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B33/00—Severing cooled glass
    • C03B33/10—Glass-cutting tools, e.g. scoring tools
    • C03B33/102—Glass-cutting tools, e.g. scoring tools involving a focussed radiation beam, e.g. lasers
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B33/00—Severing cooled glass
    • C03B33/09—Severing cooled glass by thermal shock
    • C03B33/091—Severing cooled glass by thermal shock using at least one focussed radiation beam, e.g. laser beam

Abstract

A laser glass cutting apparatus is disclosed. The present invention relates to a laser glass cutting apparatus for laser cutting a glass while its position is varied in three axes while being corrected by a vibration sensor. The laser-cutting apparatus according to the present invention is a laser-cutting apparatus provided on a stage so as to be linearly movable along an X-axis direction and being vacuum-adsorbed by a glass to form a laser-processed bed: a linear motion on a gantry frame A laser head for emitting a laser beam to a glass of the bed, which is installed at a lower portion of the gantry frame; A vibration sensor installed on the bed or the stage to detect vibration; And a controller for controlling a feed value of the bed and the laser head to be corrected when the value sensed by the vibration sensor is a predetermined value or more.

Description

[0001] The present invention relates to a laser cutting apparatus,

The present invention relates to a laser glass cutting apparatus, and more particularly, to a laser glass cutting apparatus for laser cutting a glass while its position is varied in three axes while being corrected by a vibration sensor.

Generally, a glass as a brittle member is applied to a display device for various reasons such as transparency and make-up. Nowadays, as a display device, for example, a smart phone, a monitor, a TV, a tablet PC, and so on, have been developed and sold.

The glass substrate is cut at the production stage in accordance with the size of various display devices, and a device called a glass cutting device performs such a work. The glass cutting device is a scribe wheel type device that cuts glass using a physical cutter such as a diamond cutter, and a laser cutting device that cuts using thermal shock.

In this scribe wheel system, fine diamond is provided on the circumferential surface of a disk having a predetermined diameter, and the scribe line is formed at a predetermined depth on the surface of the glass substrate by contacting the expected line to be cut with high speed rotation.

A method of propagating a crack to a substrate along a scribe line by applying a physical impact to a glass substrate on which a scribe line is formed and cutting the glass substrate. Such a scribe wheel method requires a cutting margin of a predetermined area or more, ), It is required to separate washing process and drying process to remove it. Since there is a disadvantage that the cut surface is not smooth and the cost of consumables is increased, to be.

Many glass cutting devices have been developed and used since mass production of glass substrates is required. Most of them are automated and the laser automatically processes the glass automatically.

However, in the conventional glass cutting apparatus, since various parts including the laser head must be transported while irradiating the laser beam, vibrations are generated due to various movements and laser beam irradiation, and such vibration causes an error in the glass cutting.

Published patents 2014-0033980

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a laser glass cutting apparatus capable of detecting a vibration of a bed to which a glass is sucked and processed,

In order to accomplish the above object, the present invention provides a laser processing apparatus, comprising: a bed installed on an upper part of a stage so as to be linearly movable along an X-axis direction and laser- A laser head installed in the upper part of the stage so as to be linearly movable in a gantry frame installed along the Y axis direction and emitting a laser beam to the glass of the bed conveyed from below the gantry frame; A vibration sensor installed on the bed or the stage to detect vibration; And a controller for controlling a feed value of the bed and the laser head to be corrected when the value detected by the vibration sensor is equal to or greater than a predetermined value.

Preferably, a zero point serving as a reference of a starting point of the bed and the laser head is displayed at the center of the bed.

Preferably, in the horizontal frame of the gantry frame, a Y-axis transporting screw driven by a Y-axis driving motor is installed along the longitudinal direction, and a supporting member for supporting the laser head is installed on the Y- As the Y-axis transport screw rotates, the laser head is linearly transported.

Preferably, a stage having a width smaller than that of the bed is fixed, and a guide provided on the bed is guided by a rail provided on the stage.

Preferably, a lower portion of the bed is provided with an X-axis conveying screw driven by an X-axis driving motor along the X-axis direction, a support member for engaging the X-axis conveying screw is provided on the bed, As the bed rotates, the bed is linearly driven along the X-axis direction.

Preferably, the camera is mounted on the upper part of the bed, and acquires an image of the position indication displayed on the glass when the value detected by the vibration sensor is a predetermined value or more. And a transmission unit for transmitting the image information of the camera to the control unit.

Preferably, the control unit analyzes the image information received from the camera and corrects the driving of the X-axis driving motor and the Y-axis driving motor only when the position indication deviates from the original starting position by a predetermined distance or more on the XY plane .

The present invention as described above has the following effects.

(1) The laser-cutting apparatus according to the present invention is constructed so that a bed to which a glass is sucked and processed is linearly transferred in the X-axis direction and a heavy laser head is linearly moved in the Y-axis direction, Effect.

(2) The laser-cutting apparatus according to the present invention corrects the movement of the bed and the laser head in real time by sensing the vibration generated during the glass processing, thereby providing accurate cutting processing.

1 is a perspective view of a laser-cutting apparatus according to the present invention.
FIG. 2 is a perspective view showing a laser head mounted on a gantry frame, which is a component of a laser-cutting apparatus according to the present invention.
FIG. 3 is a perspective view of a bed being transferred from above the stage, which is a component of the laser-cutting apparatus according to the present invention.
4 is a perspective view of a bed equipped with a camera, which is a component of the laser-cutting apparatus according to the present invention.
5 is a front view showing the camera shown in Fig. 4 in a front view.
FIG. 6 is a plan view of a glass obtained by a camera of a laser-cutting apparatus according to the present invention.
FIGS. 7 and 8 are state diagrams of a position display for controlling the control unit of the laser-cutting apparatus according to the present invention by using a position display.

The objects, features and advantages of the present invention will become more apparent from the following detailed description. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 3, a laser cutting apparatus according to a preferred embodiment of the present invention includes a bed 20, a support 10, a laser head 30, a vibration sensor 3, and a control unit.

3, the bed 20 is installed so as to reciprocate linearly along the X-axis direction on the upper support 10 of the stage 1, and the glass 100 is vacuum-adsorbed and laser machined .

The bed 20 is installed on the upper surface of the supporter 10 so as to be linearly transportable. That is, a support table 10 having a width smaller than that of the bed 20 is fixed to the stage 1 and a guide provided on the bed 20 is fixed to the rail 14 provided on the support table 10 . The bed 20 is provided with an adsorption line 20a for adsorbing the glass 100 as a work object by vacuum and the glass 100 is moved by the vacuum pressure of the adsorption line 20a to the bed 20 And the cutting of the glass 100 is performed in such a fixed state. The vacuum pressure applied to the adsorption line 20a of the bed 20 is a vacuum ejector system in which vacuum is generated by using compressed air. Thus, by controlling the vacuum pressure of the vacuum ejector, it becomes possible to adjust the vacuum pressure for adsorbing the glass 100.

A center point of the bed 20 indicates a zero point 20b which is a reference of the bed 20 and the starting point of the laser head 30. That is, when all the components are initialized, the emission point of the laser head 30 is positioned vertically above the zero point 20b. In this way, the zero point 20b is located at the center of the bed 20 rather than at one corner of the bed 20, so that the maximum moving distance is limited to half of the bed 20. Accordingly, the maximum movement distance for the work is reduced by half, so that the work can be quickly moved to the machining point, the error can be reduced, and the size of the apparatus can be reduced.

3, an X-axis conveying screw 12 driven by an X-axis driving motor 11 is provided along the X-axis direction, and the X-axis conveying screw 12 is installed in the bed 20, A supporting member to which the X-axis conveying screw 12 is engaged is installed and the bed 20 is linearly driven along the X-axis direction as the X-axis conveying screw 12 rotates. That is, although the X-axis conveying screw 12 and the driving motor 11 are provided on one side of the bed 20, the X-axis conveying screw 11 is inserted into the bed 20 in such a manner that the supporting member is engaged with the X- And may be guided and conveyed above the bed 20. For this reason, the bed 20 can realize a stable linear feed, but in order to realize more stable linear movement, the guide 20 is provided with the guide and the rail 10 is provided with the rails 14.

The reason why the bed 20 is linearly transferred along the X axis on the upper surface of the support table 10 is that the ground vibration of the apparatus and the vibration generated in the drive motor 11 are minimized So as to be linearly moved to the upper surface of the bed 20.

1 and 2, the laser head 30 is installed on the stage 1 so as to be linearly movable with respect to the gantry frame 2 disposed along the Y-axis direction, so that the gantry frame 2, And a laser beam is emitted to the glass 100 of the bed 20 to be conveyed from the bottom. The gantry frame 2 is composed of two vertical frames 2a and 2c and a horizontal frame 2b connecting upper ends of the vertical frames 2a and 2c. A Y-axis transporting screw 32 driven by a Y-axis drive motor 31 is provided along the longitudinal direction in the horizontal frame 2b of the gantry frame 2. The Y- A supporting member for supporting the laser head 30 is provided so as to engage with the laser head 30, and the laser head 30 is linearly transported as the Y-axis transporting screw 32 rotates.

Referring to FIG. 2, the laser head 30 is vertically and vertically adjustable with respect to the support member 33. Referring to FIG. 1, this height adjustment corresponds to movement along the Z-axis direction. The laser head 30 is assembled and supported on the support member 30 and the height of the laser head 30 can be adjusted as described above. And a cutting operation is performed. That is, the height is not adjusted in the Z-axis direction during transport or during the operation, but the height adjustment is of course possible in the stopped state.

The laser head 30 emits a laser beam, which is generated by the laser generator 40. 1, the laser generator 40 is rigidly mounted on an upper portion of a frame erected on the stage 1. In the laser generator 40, a laser is generated, and the laser is emitted downward by the laser head 30 via an EXPANDER lens and two reflection mirrors.

The horizontal frame 2b of the gantry frame 2 is provided with a rail 34 parallel to the horizontal movement direction of the laser head 30. [ The support member 33 supporting the laser head 30 is provided with a guide through which the rail 34 is inserted. That is, when the Y-axis driving motor 31 is operated in a state where the rail 34 is inserted and constrained to the guide, the supporting member 33 is conveyed along the Y-axis conveying screw 32. Thus, a more precise and stable linear motion is ensured. In addition, the laser head 30 is doubly supported by the rail 34 as well as supported by the Y-axis transporting screw 32.

The vibration sensor 3 is installed on the bed 20 or the stage 1 to sense vibration. The vibration sensor 3 may be any of a movable coil type vibration sensor and an optical fiber vibration sensor. Any type of vibration sensor may be used, but a movable coil type vibration sensor is suitable. Since the laser cutting apparatus 100 processes the glass 100 while moving the bed 20 and the laser head 30 along the respective linear directions, The vibration due to the movement of the weight 20 such as the bed 20, the glass 100, and the laser head 30 occurs naturally.

The vibration sensor 3 senses the vibration generated in the laser cutter and the signal is transmitted to the control unit. When the value detected by the vibration sensor 3 is equal to or greater than a predetermined value, the controller controls the conveyance value of the bed 20 and the laser head 30 to be corrected.

The control unit corrects the movement values of the bed 20 and the laser head 30 as shown in FIGS.

4, when the camera 50 is fixed on the bed 20 and the value detected by the vibration sensor 3 is a predetermined value or more, the image of the position mark 100a displayed on the glass 100 The control unit controls the control unit to acquire the control information.

The camera 50 is configured to fix and disassemble the camera frame 52 whose one end is fixed by the fixing member 51 to the bed 20 by using an adjusting screw 50a . Accordingly, when a new glass is supplied before the work, the position is adjusted so that the camera 50 is positioned above the position indicator 100a.

The image information of the camera 50 is transmitted to the control unit by the transmission unit. When the image information is received by the control unit, the controller analyzes the image information received from the camera 50, and only when the position indication 100a is out of the original starting position by a predetermined distance or more on the XY plane, the X Axis drive motor 11 and the Y-axis drive motor 31. [0034] FIG. In other words, ignore the vibration within the error range and continue the work.

Such a correction operation is a work in which feedback is performed in real time when the vibration occurrence value becomes a certain value or more.

The operation of cutting the glass 100 with a laser beam in the laser-cutting apparatus according to the present invention is as follows.

In Fig. 1, a glass (100) as a work object is supplied onto the bed (20) by a robot or an operator. In the bed 20, the glass 100 is firmly fixed to the upper surface of the bed 20 through a vibration absorption line 20a with a predetermined vacuum pressure as the glass 100 is supplied. Then, the camera 50 is adjusted on the camera frame 52 to be positioned above the position mark 100a of the glass 100 via the adjusting screw 50a.

When the glass 100 is seated and fixed, the laser generator 40 is operated, and then the control unit starts controlling the X, Y axis driving motors 11, 31. The control unit calculates a cutting position of the glass 100 based on the value input by the operator and drives the driving motors 11 and 31.

The bed 20 and the laser head 30 are linearly moved by the respective conveying screws 12 and 32 so that the laser beam 30 emitted from the laser head 30 on the XY plane 100 is performed according to the operation procedure.

When the vibration is generated while the work is normally performed, the vibration value is measured by the vibration sensor 3. [ At this time, if the value detected by the vibration sensor 3 is less than a predetermined value, the controller ignores the value and continues the cutting operation without real-time feedback.

During the operation, when the value sensed by the vibration sensor 3 becomes equal to or greater than a predetermined value, the control unit operates the camera 50. The camera 50 transmits image information of the position indication 100a of the glass 100 to the control unit through a transmission unit.

7, when the image information is received in the form of a lattice, one unit U corresponds to a predetermined value or more, and the control unit controls the driving motors 11 and 31 Correct the value. In other words, the state A is a state in which the position indicator 100a is in the middle, or a state in which the position indicator 100a is moved by B, .

8, even when receiving image information in the form of a circle, the control unit corresponds to a unit U ', in which a size corresponding to a radius corresponds to a predetermined value or more, and a unit U' And corrects the control values of the driving motors 11 and 31. [ Since the state of A is shifted to a state in which the position indicator 100a is in the middle or in a state similar to B by the occurrence of vibration, that is, a position deviating from one unit (U ') circle, .

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 inventions. It will be apparent to those of ordinary skill in the art.

1: stage
2: Gantry frame 3: Vibration sensor
10: Support 11: X-axis drive motor
12: X axis feed screw 14, 34: Rail
20: bed 20a: adsorption line
20b: Zero point 30: Laser head
31: Y-axis driving motor 32: Y-axis feeding screw
50: camera 100: glass

Claims (7)

A bed installed in the upper part of the stage so as to be linearly moved along the X-axis direction, the glass being vacuum-adsorbed to perform laser processing;
A laser head installed in the upper part of the stage so as to be linearly movable in a gantry frame installed along the Y axis direction and emitting a laser beam to the glass of the bed conveyed from below the gantry frame;
A vibration sensor installed on the bed or the stage to detect vibration;
A controller for controlling a feed value of the bed and the laser head to be corrected when the value detected by the vibration sensor is a predetermined value or more;
A camera which is fixed to the upper part of the bed and acquires an image of a position mark displayed on the glass when a value detected by the vibration sensor is a predetermined value or more; And
A transmission unit for transmitting image information of the camera to the control unit;
Lt; / RTI >
Wherein the control unit analyzes the image information received from the camera with the vibration value received from the vibration sensor being equal to or greater than a predetermined value and feeds back the position information in real time when the position indication deviates from the original starting position by a predetermined distance or more on the XY plane And controls to correct the feed value of the bed and the laser head. The method according to claim 1,
And a zero point serving as a reference of a starting point of the bed and the laser head is displayed at the center of the bed. The method according to claim 1,
A Y-axis transporting screw driven by a Y-axis driving motor is installed along a longitudinal direction in a horizontal frame of the gantry frame, and a supporting member for supporting the laser head is fitted to the Y-axis transporting screw, Wherein the laser head is linearly transported as the transport screw rotates. The method according to claim 1,
Wherein a support table having a width smaller than that of the bed is fixed to the stage, and a guide provided on the bed is guided by being inserted into a rail provided on the support table. 5. The method of claim 4,
The bed is provided with an X-axis conveying screw driven by an X-axis driving motor along an X-axis direction, and a supporting member for engaging the X-axis conveying screw is installed on the bed. As the X-axis conveying screw rotates Wherein the bed is linearly driven along an X-axis direction. delete delete
KR1020150061796A 2015-04-30 2015-04-30 Glass cutting apparatus with laser beam KR101680843B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102292024B1 (en) 2021-06-17 2021-08-23 ㈜ 엘에이티 Breaking Stage for Ultra-thin Glass Laser Cutting

Families Citing this family (3)

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CN108196433A (en) * 2018-02-14 2018-06-22 温培彬 Laser drawing machine
CN109262152A (en) * 2018-09-28 2019-01-25 深圳市冰海科技有限公司 A kind of double-station FPC ultraviolet laser cutting equipment
CN110560932A (en) * 2019-09-30 2019-12-13 合肥工业大学 self-detection teaching laser cutting machine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002336984A (en) * 2001-05-11 2002-11-26 Sumitomo Heavy Ind Ltd Laser beam machining device

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Publication number Priority date Publication date Assignee Title
KR101643326B1 (en) 2012-09-11 2016-07-27 참엔지니어링(주) Apparatus and method for detecting defect of lcd panel

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002336984A (en) * 2001-05-11 2002-11-26 Sumitomo Heavy Ind Ltd Laser beam machining device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102292024B1 (en) 2021-06-17 2021-08-23 ㈜ 엘에이티 Breaking Stage for Ultra-thin Glass Laser Cutting

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