KR101250225B1 - Cutting apparatus and method using laser - Google Patents

Abstract

The laser cutting device of the present invention is disposed on a table on which a glass substrate is placed, a scratch generating portion for generating a scratch on the first cut portion of the glass substrate, and a laser beam to heat the cut portion of the glass substrate. And a cutting head for cutting the glass substrate by arranging the laser beam irradiating portion and the coolant spraying portions for cooling the cutting portion of the glass substrate, and a first moving mechanism installed on the table to move the cutting head in the horizontal and vertical directions. And a second moving mechanism, wherein the cutting head cuts the glass substrate in the transverse direction and rotates the scratch generator, the laser beam irradiator, and the coolant jetting unit to cut the glass substrate in the longitudinal direction, thereby changing the position of the glass substrate. It is possible to cut horizontally and vertically without any inconvenience. Neunghada.

Description

Laser cutting device and cutting method {CUTTING APPARATUS AND METHOD USING LASER}

The present invention relates to a laser cutting device and method for cutting a glass substrate using a laser.

Currently, a substrate of a display device uses a glass-based substrate as a base substrate, and the glass substrate is cut and used for each product size. In order to cut a glass substrate to a size of a product, a method of cutting by applying a diamond saw or a thermal shock is also used, but recently, a device for cutting a glass substrate using a laser is commonly used.

Currently used laser cutting devices include a cutting head having a table on which a glass substrate is placed, a laser irradiation device for irradiating a laser beam, and a coolant spray device for spraying a coolant, which is arranged to be linearly movable in one direction on the table. do.

Such a cutting device cuts the glass substrate by irradiating a laser beam to the cut portion of the glass substrate and immediately cooling the cut portion by spraying a coolant on the heated portion.

However, the laser cutting device currently used has a structure in which the cutting head is linearly reciprocated only in one direction, so when the glass substrate needs to be cut horizontally and then vertically again, the position of the glass substrate placed on the table is changed to 90 degrees. Since the cutting operation is cumbersome and complicated, there is a problem that it is difficult to precise cutting due to the error due to the position change of the glass substrate.

The present invention is to provide a laser cutting device and a cutting method that is easy to use and precise cutting work to be able to cut longitudinally without changing the position of the glass substrate after the horizontal cutting of the glass substrate.

Another object of the present invention is to provide a laser cutting device and a cutting method that can improve the cutting performance by generating a scratch on the first laser beam irradiation when cutting the glass substrate using a laser beam.

Still another object of the present invention is to provide a laser cutting device and a cutting method capable of improving the quality of the cutting surface by forming a cutting groove in the heated cutting part by irradiating a laser beam and allowing a coolant to be injected into the cutting groove.

The technical object of the present invention is not limited to the above-mentioned technical objects and other technical objects which are not mentioned can be clearly understood by those skilled in the art from the following description will be.

In one embodiment, the laser cutting device includes a table on which a glass substrate is placed, a scratch generating unit disposed on an upper side of the table, and a scratch generating unit for generating a scratch on the first cutting portion of the glass substrate, and a cutting portion of the glass substrate by irradiating a laser beam. A laser beam irradiating portion for heating the laser beam and a coolant spraying portion for cooling the cutting portion of the glass substrate, arranged in a row, for cutting the glass substrate; And a moving mechanism and a second moving mechanism, wherein the cutting head cuts the glass substrate in the horizontal direction, and then rotates the scratch generator, the laser beam irradiator, and the coolant sprayer to cut the glass substrate in the longitudinal direction. .

The cutting head according to an embodiment includes a base frame connected to the first moving mechanism, a rotatable frame rotatably installed on the base frame, and fixed to the scratch generating unit, the laser beam irradiating unit, and the coolant spray unit in series; It includes a drive unit for rotating the rotation frame.

The scratch generating unit according to an embodiment includes an actuator fixed to the rotating frame and a scratch tool connected to the actuator to generate a scratch on the glass substrate, wherein the scratch generating unit reciprocates the initial cutting portion within a predetermined range It is characterized by generating a scratch.

The laser beam irradiator according to an embodiment includes a beam splitter having a plurality of reflectors having different reflectances and a beam splitter arranged to radiate a laser beam fixed to the rotating frame into a plurality of beams, and disposed below the beam splitter. And a plurality of lenses that make the laser beam irradiated from the splitter oval or straight.

Laser cutting method according to an embodiment of the present invention comprises the steps of aligning the glass substrate on the table, cutting the glass substrate in the horizontal direction by moving the cutting head in the horizontal direction of the table, the scratch generating portion of the cutting head, laser beam irradiation And rotating the coolant jet 90 degrees, and cutting the glass substrate in the longitudinal direction by moving the cutting head in the longitudinal direction of the table.

Laser cutting device and cutting method of the present invention by rotating the scratch generating unit, the laser beam irradiation unit and the coolant injection unit rotatably in the cutting head after the horizontal cutting of the glass substrate, the scratch generating unit, the laser beam irradiation unit and the coolant injection unit 90 degrees By performing the longitudinal cutting of the glass substrate, it is not necessary to change the position of the glass substrate, the cutting operation is convenient and precise cutting is possible.

In addition, the laser cutting device and the cutting method of the present invention can improve the quality of the cutting surface by generating a scratch on the minimum cutting portion for irradiating the laser beam so that the laser beam irradiation can be made precisely.

1 is a top view of a laser cutting device according to an embodiment of the present invention.
2 is a perspective view of a cutting head according to an embodiment of the present invention.
3 is a front view of a cutting head according to an embodiment of the present invention.
4 is a configuration diagram of a laser beam irradiation unit according to an embodiment of the present invention.
5 is a front view of a cutting head according to another embodiment of the present invention.
6 is an operational state diagram showing that the cutting head according to an embodiment of the present invention cut the glass substrate in the horizontal direction.
7 is an operational state diagram showing that the cutting head according to an embodiment of the present invention cut the glass substrate in the longitudinal direction.
8 is a process flowchart showing a cutting method of the laser cutting device according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The sizes and shapes of the components shown in the drawings may be exaggerated for clarity and convenience. In addition, terms defined in consideration of the configuration and operation of the present invention may be changed according to the intention or custom of the user, the operator. Definitions of these terms should be based on the content of this specification.

1 is a top view of a laser cutting device according to an embodiment of the present invention, FIG. 2 is a perspective view of a cutting head according to an embodiment of the present invention, and FIG. 3 is a view of a cutting head according to an embodiment of the present invention. Front view.

Laser cutting device according to an embodiment is a table 10 on which the glass substrate 20 is placed, a cutting head 50 for cutting the glass substrate 20 is disposed at a predetermined interval above the table 10, The first moving mechanism 30 is arranged in one direction of the table 10 to move the cutting head 50 in the horizontal direction A, and the cutting head 50 is disposed in the other direction of the table 10 in the vertical direction. And a second moving mechanism 40 for moving to (B).

2 and 3, the cutting head 50 supports the entire cutting head and is rotatably supported by the base frame 60 and the base frame 60, which are connected to the first moving mechanism 30. The rotating frame 70 to be rotated, the driving unit 80 for rotating the rotating frame 70, and the laser beam irradiation unit which is provided on the rotating frame 70 to irradiate and heat the laser beam to the cut portion of the glass substrate 20 ( 100), a coolant injection unit 110 for rapidly cooling the cut portion heated by the laser beam, and a scratch generator 120 for generating a scratch on the cut portion to which the laser beam is first irradiated.

The base frame 60 is a vertically oriented flat plate, and a connecting member 66 connected to the first moving mechanism 30 is fixed at an upper end thereof, and an upper support plate 62 and a lower support plate 64 are fixed on one side thereof. It is fixed at intervals.

The rotating frame 70 is provided with a radar beam irradiator 100, a coolant spray unit 110, and a scratch generator 120, and an upper side rotatably supported through a through hole formed in the upper support plate 62. The hinge portion 72 and the lower hinge portion 74 rotatably supported by the lower support plate 64 are provided. Of course, the upper hinge portion 72 and the lower hinge portion 74 is provided with a bearing to support the load of the rotating frame 70 and to enable the rotational movement.

The rotation frame 70 is disposed to be rotated about 90 degrees to the base frame 60, in some cases may be arranged to be rotated more than 90 degrees.

The driving unit 80 serves to rotate the rotation frame 70, the drive motor 82 is fixed to the upper support plate 62, the drive pulley 84 is fixed to the drive shaft of the drive motor 82 and And a driven pulley 86 connected to the upper support 72 of the rotation frame 70 and rotatably disposed on an upper surface of the upper support plate 62, and wound between the driving pulley 84 and the driven pulley 86. A belt 88.

Here, the drive pulley 84 and the driven pulley 86 are provided with gear teeth on the outer circumferential surface, and the belt 88 preferably uses a timing belt wound around the gear teeth. That is, the driving force of the driving motor 82 can be transmitted to the rotation frame 70 more accurately by using the timing belt, and the rotation angle of the rotation frame 70 can be precisely controlled.

The upper hinge portion 72 has a passage 90 through which a center is formed, and will be described later. However, the laser beam passes through the passage 90.

As shown in FIG. 4, the laser beam irradiator 100 is disposed below the beam splitter 102, 104, 106, and 108, which splits and irradiates a laser beam that is fixed to the rotating frame 70 into a plurality of beams. And a plurality of lenses 132, 134, 136 and 138 that make the laser beam emitted from the beam splitter oval or straight.

The beam splitters 102, 104, 106, and 108 may be formed of a plurality of reflecting plates having different reflectances, and thus the light intensity of the divided laser beam may be the same or different according to the reflectance. If the laser beams have the same light intensity and the number of reflectors is 4, the reflectance is set to 25%, 34%, 50%, and 100% in the order that the laser beams are irradiated. Becomes

As such, the laser beam irradiator 100 sequentially irradiates a plurality of laser beams at predetermined intervals on the cut portions of the glass substrate 20 and the irradiation points 112 are formed in an elliptical or straight shape to reduce the quality of the cut portions. And more accurate cutting is possible.

In addition, a plurality of reflecting plates 140 and 142 are used to transfer the laser beam generated by the laser beam generator (not shown) to the laser beam irradiator 100. That is, the reflecting plates 140 and 142 are fixed to the upper support plate and reflect the laser beam incident in the horizontal direction downward, and are fixed to the rotating frame 70 and reflected from the first reflecting plate 140. And a second reflector for reflecting the laser beam to the laser beam irradiator.

Here, the laser beam reflected from the first reflector plate 140 passes through the center 90 of the passage 90 formed in the upper support portion 72 and the driven pulley 86 described above, and is transmitted to the second reflector plate 142. That is, since the rotation frame 70 is rotated so that the laser beam passes through the center of the rotation axis so that the laser beam from the first reflecting plate 140 to the second reflecting plate 142 irrespective of the position where the rotating frame 70 is rotated. To be delivered.

In more detail, the first reflecting plate 140 and the second reflecting plate 142 are disposed in a straight line and the laser beam reflected from the first reflecting plate 140 passes through the center of the rotation axis to the second reflecting plate 142. Since the incident angle, the reflection angle of the laser beam can be maintained the same regardless of the rotated position of the rotating frame 70.

The coolant injection unit 110 is fixed to the rotating frame 70 and is disposed at a rear side of the laser beam irradiation unit 100 at a predetermined interval to rapidly irradiate the laser beam from the laser beam irradiation unit 100 to rapidly heat the cut portion. The glass substrate 20 is cut by cooling. Here, the coolant may be used coolant, and gas other than the coolant may be used.

The scratch generator 120 is installed on the rotating frame 70 and is disposed at a front side of the laser beam irradiator 100 at a predetermined interval to scratch the first portion of the cut portion of the glass substrate 20 to which the laser beam is irradiated. The laser beam can be irradiated more efficiently.

The scratch generating unit 120 includes an actuator 122 fixed to the rotating frame 70 and a scratch tool 124 mounted on the actuator 122 to generate a scratch on the cut portion of the glass substrate 20. do. Here, the actuator 122 may be applied to a variety of structures, such as a pneumatic, hydraulic cylinder or a solenoid type that is operated when the power is supplied.

Looking at the action of the scratch generating unit 120, when the cutting head 50 is moved in the horizontal direction (A) and vertical direction (B) to reach the first cut portion of the glass substrate 20, the actuator 122 is operated As a result, the scratch tool 124 is lowered to contact the first cut portion of the glass substrate 20. In this state, the entire cutting head 50 reciprocates back and forth momentarily to scratch the first cut portion of the glass substrate 20. Generate. When the scratch generation is completed, the actuator 122 is operated to raise the scratch tool 124.

The scratch generator 120, the laser beam irradiator 100, and the coolant sprayer 110 are sequentially disposed in a straight line at a predetermined interval. That is, since the scratch generator 120, the laser beam irradiator 100, and the coolant injection unit 110 are fixed in a row to the rotary frame, the glass substrate 20 is cut in the horizontal direction A when the rotary frame is positioned. When the rotary frame 70 is in the rotated position, the glass substrate 20 is aligned to cut the glass substrate 20 in the longitudinal direction (B).

As shown in the drawing, the first moving mechanism 30 is disposed in the horizontal direction of the table 20 and the connecting member 66 connected to the base frame 60 is fixed to linearly move the connecting member 66 in the horizontal direction. The first moving mechanism 30 may be applied with various types such as a lead screw type and a belt type.

Then, the second moving mechanism 40 is disposed on both sides in the longitudinal direction of the table 10, respectively, and moves the entire first moving mechanism 30 in the vertical direction. This second moving mechanism 40 is preferably applied to the belt type disposed on both sides of the table (10).

5 is a front view of a cutting head according to another embodiment of the present invention.

The cutting head according to another embodiment is disposed on the rotating frame 70 and disposed behind the laser beam irradiation unit 100 and the laser beam irradiation unit 100 for heating by irradiating a laser beam to the cut portion of the glass substrate 20. And a cutting groove forming unit 150 to form a cutting groove in the cut portion heated by the laser beam, and a coolant injection unit disposed at the rear of the cutting groove forming unit 150 to inject a coolant into the cutting groove for rapid cooling. 110 and a scratch generator 120 disposed in front of the laser beam irradiator to generate a scratch on the cut portion to which the laser beam is first irradiated.

Here, the configuration of the laser beam irradiation unit 100, the coolant injection unit 110 and the scratch generator 120 is the laser beam irradiation unit 100, the coolant injection unit 110 and the scratch generator described in the above embodiment Since it is the same as the structure of 120, the description is abbreviate | omitted.

The cutting groove forming unit 150 is a cutting groove forming tool 152 for forming a cutting groove on a heated cutting portion irradiated with a laser beam, and the cutting groove forming tool 152 is connected to and fixed to the rotating frame 70. It includes an actuator 154 for driving the cutting groove forming tool 152 in the vertical direction.

The cutting groove forming tool 152 may be any tool as long as the material is strong enough to form a groove in the cutting portion. For example, a diamond wheel may be applied.

As described above, the cutting head according to another embodiment may improve the quality of the cutting surface because the coolant is injected into the cutting groove after forming the cutting groove in the heated cutting portion by irradiating the laser beam.

As described above, the operation of the laser cutting device according to an embodiment of the present invention constituted will be described below.

6 and 7 are operational state diagrams of the laser cutting device according to an embodiment of the present invention, Figure 8 is a process flow chart showing a laser cutting method according to an embodiment of the present invention.

First, as shown in FIG. 6, the glass head 20 is aligned on the table 10, and then the cutting head 50 is operated by operating the first moving mechanism 30 and the second moving mechanism 40. (20) to be placed at the cut portion. (S10)

That is, in order to cut the glass substrate 20 in the horizontal direction A, the scratch generating unit 120, the laser beam irradiation unit 100, and the coolant jetting unit 110 are disposed in the horizontal direction A of the glass substrate 20. Arrange in line.

In this state, scratches are generated at the first cut portion in the horizontal direction A of the glass substrate 20. That is, the actuator 122 is driven to contact the scratch tool 124 with the first cut portion, and then scratched. The tool 124 is linearly reciprocated within a predetermined range to generate scratches at the initial cut portion. At this time, the linear reciprocating movement of the scratch tool 124 drives any one of the first moving mechanism 30 and the second moving mechanism 40 to move the entire cutting head 50 so that the scratch tool 124 reciprocates linearly. Scratch at the minimum cut while moving. The number of linear reciprocating movements of the scratch tool 124 may be one or more times.

When a scratch is generated on the first cut portion of the glass substrate 20, the scratch is generated by irradiating a laser beam on the scratched portion. (S30) As described above, the laser beam includes the beam splitters 102, 104, 106 and 108 and the plurality of lenses 132, 134, 136 and 138. It is divided into a large number by the action of and is irradiated to the glass substrate in an oval or straight form.

Then, a coolant is sprayed on the portion heated by the laser beam to instantly cool the cut glass substrate (S40).

 When the horizontal direction (A) cutting of the glass substrate is completed by such an operation, as shown in FIG. In step (B), the scratch generating unit 120, the laser beam irradiation unit 100, and the coolant jetting unit 110 are arranged in a line (S50).

Here, by controlling the driving of the drive motor 82 of the drive unit 80 it is possible to control the rotation angle of the rotation frame 70, accordingly it is possible to adjust the rotation angle of the rotation frame 70 to various angles It is possible to cut the glass substrate 20 in various forms such as 45 degree diagonal direction as well as vertical direction.

Then, the glass substrate 20 forms a scratch in the first cut portion cut in the longitudinal direction (B) as in the transverse direction, forms a scratch, irradiates a laser beam to the portion where the scratch is formed, and then heats the coolant by spraying the glass. Cut the substrate. (S60, S70, S80)

Herein, when the cutting head according to another embodiment is applied, the cutting groove forming unit 150 is operated to form a cutting groove in the heated cutting part by irradiating a laser beam during the horizontal and longitudinal cutting of the glass substrate. Coolant is injected into the cutting groove.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. Accordingly, the true scope of the present invention should be determined by the following claims.

10: Table 20: glass substrate
30: first moving mechanism 40: second moving mechanism
50: cutting head 60: base frame
62: upper support plate 64: lower support plate
66: connecting member 70: rotating frame
72: upper hinge portion 74: lower hinge portion
80: drive unit 82: drive motor
84: driven pulley 86: driven pulley
88: belt 90: passage
100: laser beam irradiation unit 110: coolant injection unit
120: scratch generating unit 122: actuator
124: scratch tool 140: first reflecting plate
142: second reflecting plate 150: cutting groove forming portion

Claims (13)

A table on which a glass substrate is placed;
A coolant spray disposed above the table and provided with a scratch generator for generating scratches on the first cut portion of the glass substrate, a laser beam irradiator for heating the cut portion of the glass substrate by irradiating a laser beam, and a coolant spray for cooling the cut portion of the glass substrate. Cutting heads for cutting the glass substrate arranged in an additional line; And
A first moving mechanism and a second moving mechanism installed on the table to move the cutting head in the horizontal and vertical directions;
The cutting head may cut the glass substrate in the longitudinal direction by cutting the glass substrate in the horizontal direction and then rotating the scratch generating unit, the laser beam irradiation unit, and the coolant spray unit.
The cutting head may include a base frame connected to the first moving mechanism, a rotating frame rotatably installed on the base frame, and the scratch generating unit, the laser beam irradiating unit, and the coolant jetting unit fixed in a line, and rotating the rotating frame. It is configured to include a drive unit for driving,
The upper side of the base frame is fixed to the upper support plate, the lower side is fixed to the lower support plate, the upper side of the rotating frame is fixed to the upper hinge portion rotatably supported by the upper support plate, the lower side rotatably to the lower support plate The lower hinged part is fixed,
The drive unit may include a drive motor fixed to the upper support plate, a drive pulley fixed to a drive shaft of the drive motor, a driven pulley connected to the upper hinge part and disposed above the upper support plate and wound by a drive pulley and a belt. Including,
A passage is formed in the driven pulley and the upper hinge part, and a first reflector for reflecting the laser beam generated by the laser beam generator is fixed to the upper support plate, and the laser beam reflected from the first reflector is attached to the rotating frame. The second reflecting plate to be transmitted to the laser beam irradiation unit is fixed, the laser cutting device, characterized in that the laser beam reflected from the first reflecting plate passes through the passage to enter the second reflecting plate. delete delete delete delete The method of claim 1,
The scratch generating unit includes an actuator fixed to the rotating frame and a scratch tool connected to the actuator to generate a scratch on the glass substrate,
The scratch generating unit is a laser cutting device, characterized in that for generating a scratch while reciprocating the initial cutting portion within a predetermined range. The method of claim 1,
The laser beam irradiator includes a beam splitter having a plurality of reflectors having different reflectances and a beam splitter disposed to radiate the laser beam fixed to the rotating frame into a plurality of beams and irradiated from the beam splitter. Laser cutting device comprising a plurality of lenses to make the laser beam oval or straight. The method of claim 1,
Laser cutting device further comprises a cutting groove forming unit for forming a cutting groove in the heated cutting portion by irradiating a laser beam between the laser beam irradiation section and the coolant injection unit. 9. The method of claim 8,
The cutting groove forming unit includes an actuator fixed to the rotating frame and a cutting groove forming tool connected to the actuator to move up and down in accordance with the driving of the actuator to form a cutting groove in the cutting portion.
delete delete delete delete

Images