WO2016060395A1 - Induction heating device - Google Patents

Abstract

The present invention relates to an induction heating device, and more specifically, to an induction heating device comprising: a power supply source; a heating coil including connection parts, which are connected to the power supply source and are provided with a corrugated tube, and a heating part for heating by means of power supplied from the power supply source through the connection parts; and a position correction part, which is fixed to the connection part on the side of the heating part with respect to the corrugated tubes and is provided with an x-axis moving means and a y-axis moving means, wherein the length and left and right sides of the corrugated tubes can be controlled by moving the position of the x-axis moving means and the y-axis moving means, thereby enabling uniform temperature distribution of a heat-emitting body, and yielding a glass substrate having high strength through uniform chamfering when the heat-emitting body is utilized for chamfering glass.

Description

Induction heating device

The present invention relates to an induction heating apparatus.

Glass products are treated as essential components in a wide range of technologies and industries, such as monitors, cameras, VTRs, mobile phones, video and optical equipment, automobiles, transportation equipment, various tableware, and construction facilities. According to the present invention, glass having various physical properties is manufactured and used.

Among them, the touch screen is attracting attention as a key component of the video equipment. A touch screen is a display and input device installed on a monitor for a terminal to perform a specific command to a computer by inputting various data such as simple contact or drawing a character or a picture by using an auxiliary input means such as a finger or a pen. Such touch screens are increasingly important as a key component for various digital devices that transmit or exchange information to one or both of mobile communication devices such as smartphones, computers, cameras, certificates such as certificates, and industrial equipment. The range is expanding rapidly.

The upper transparent protective layer directly contacting the user among the components constituting the touch screen is mainly a plastic organic material such as polyester or acrylic, and the material is deformed due to continuous and repeated use and contact due to its low heat resistance and low mechanical strength. There is a limit in durability, such as being scratched or scratched. Therefore, the upper transparent protective layer of the touch screen is gradually replaced by the tempered thin glass which is excellent in heat resistance, mechanical strength and hardness from the conventional transparent plastic. In addition to the use of tempered thin glass as a transparent protective window of the LCD or OLED monitor in addition to the touch screen, its use area is gradually expanding.

Tempered glass is compressed due to the large compressive stress present on the surface when it is cut, and it breaks out of chaotic debris instead of the intended shape, or even if the cut is made in the intended shape. Since the stress disappears and the strength decreases, it is difficult to cut to a desired size or shape once it is strengthened regardless of the composition of the glass.

Therefore, the cutting method of tempered glass requires very precise and stringent conditions as compared with the conventional cutting method of glass. The method introduced as the cutting method of such tempered glass is as follows.

First, there is a mechanical cutting method. In this way, the diamond or carbide notching wheels are pulled across the glass surface so that the scale is mechanically inscribed on the glass plate, which is then cut by bending the glass plate along the scale to create a cutting edge. Typically, such mechanical cutting will produce lateral cracks of about 100 to 150 μm deep, which cracks arise from the cutting line of the eyewheel. Since the lateral cracks lower the strength of the window substrate, the cutouts of the window substrate must be polished and removed.

However, the above-described mechanical cutting method also needs to be replaced with expensive cutting wheels over time, and there is a disadvantage in that precise cutting is not easy.

Next, there is a non-contact cutting method through a laser. The method expands the glass surface by moving the laser along a predetermined path on the glass surface through a check on the edge of the window substrate, and along the path of the laser, by pulling the surface along with the cooler moving behind it. The window substrate is cut by thermally propagating the cracks.

On the other hand, since the cut surface of the tempered glass is sharp and its surface is uneven and vulnerable to external impact, it must go through a chamfering process.

Chamfering process is generally performed by rotating the polishing wheel for the processing of the cut, that is, chamfering. Through the chamfering process, the smoothness of the cut portion is improved and the strength is increased. However, it was difficult to provide a window substrate having excellent strength in the conventional chamfering process.

Korean Patent No. 1076105 discloses an edge grinding and / or polishing mechanism and method of a glass sheet.

[Preceding technical literature]

[Patent Documents]

Korean Patent Registration No. 1076105

An object of the present invention is to provide an induction heating apparatus capable of obtaining a heating element having a uniform temperature distribution.

An object of the present invention is to provide an induction heating apparatus which can obtain a uniform chamfering amount when used for chamfering a glass substrate by induction heating of a heating element.

1. power source; And

A heating coil connected to the power supply source and having a connection part including a corrugated pipe and a heating part configured to perform heating by power supplied through the connection part from a power supply source; And

And a position correction unit fixed to the crimp tube reference heating unit side connection unit and having an x-axis moving unit and a y-axis moving unit.

Induction heating apparatus that can adjust the length and the left and right of the corrugated pipe according to the positional movement of the x-axis and y-axis moving means.

2. In the above 1, wherein the x-axis moving means has a first stage and a first stage moving in the x-axis according to the rotation of the first motor, the y-axis moving means is the rotation of the second motor and the second motor And a second stage moving along the y axis according to the invention.

3. In the above 2, wherein the y-axis movement means is fixed to the heating unit side connection, the y-axis movement means can move in the y-axis along the linear guide rail on the x-axis movement means, induction heating apparatus.

4. In the above 2, wherein the x-axis moving means is fixed to the heating unit side connection, the x-axis moving means can move in the x-axis according to the linear guide rail on the y-axis moving means, induction heating apparatus.

5. Induction heating device of any one of 1 to 4 above and

The chamfering apparatus of glass containing the heat generating body heated by a heating coil, and chamfering glass.

6. In the above 5, the imaging device for imaging the heating element and the heating coil in the upper or lower side of the heating element; And

And a control device for calculating an amount of misalignment between the center of the heating element and the center of the heating unit of the heating coil in the captured image received by the imaging device, and controlling the x-axis moving means or the y-axis moving means according to the calculated value. , Chamfering device of glass.

7. Positioning the heating element so that the heating portion of the induction heating apparatus of any one of the above 1 to 4 to surround the heating element is a predetermined distance away from the heating element;

Imaging the heating element and a heating coil above or below the heating element;

Calculating a degree to which the center of the heating element and the center of the heating unit of the heating coil are shifted from each other by the captured image; And

And moving the x-axis or y-axis moving means in accordance with the misalignment degree to match the center of the heating element and the heating part by adjusting the length and the left and right of the corrugated pipe.

The present invention can exactly match the center of the heating coil and the center of the heating element, so that the heating element has a uniform temperature distribution. When this is used to chamfer the glass, it is possible to perform a uniform chamfer can be obtained a glass substrate having a high strength.

1 is a view schematically showing a heating element heated by a high frequency induction heating method.

FIG. 2 is a view schematically illustrating a chamfering method in which a heating element is moved while contacting a glass substrate to remove an edge where a horizontal plane and a vertical plane intersect the glass substrate in a strip form by thermal stress.

3 is a diagram illustrating a temperature distribution of a heating element when the center of the induction coil and the center of the heating element do not coincide.

4 is a schematic plan view of an induction heating apparatus according to an embodiment of the present invention.

5 is a schematic left side view of an induction heating apparatus according to an embodiment of the present invention.

Figure 6 shows a corrugated pipe in the heating coil of the induction heating apparatus according to an embodiment of the present invention.

7 is a front view of the position correction unit of the induction heating apparatus according to an embodiment of the present invention.

8 is a schematic perspective view of a position correction unit of an induction heating apparatus according to an embodiment of the present invention.

The present invention provides a power supply; And a heating coil connected to the power supply source and having a connection part including a corrugated pipe 33 and a heating part configured to perform heating by electric power supplied through the connection part from a power supply source. And a position corrector fixed to the corrugated pipe reference heater side connection part and having an x-axis moving means and a y-axis moving means. By allowing the control of the, the heating element has a uniform temperature distribution, and when used in the chamfering of the glass, it is possible to perform a uniform chamfering relates to an induction heating apparatus to obtain a glass substrate having a high strength.

The present invention relates to an induction heating apparatus, which can be utilized when chamfering a glass substrate by electromagnetic induction heating of a heating element.

In the chamfering method of the glass substrate by induction heating, as shown in FIGS. 1 and 2, the heating element 10 heated by the electromagnetic induction by the heating coil 30 contacts the edge of the glass substrate 20 to be subjected to thermal stress. It is a method of chamfering the glass substrate 20 by cutting out the edge part of the glass substrate 20 by this. When the heated heating element 10 is in contact with the edge of the glass substrate 20, due to the characteristics of the glass having a low heat transfer rate, thermal stress is generated at the corner portion where the heating element 10 is in contact, so that the portion from the heating element contact portion to a predetermined depth is removed. Will fall off. Therefore, when the heating element 10 moves in contact with the edge of the glass substrate 20, the edge of the glass substrate 20 may be chamfered.

This method essentially suppresses the generation of glass dust, and since the chamfers are stripped off by the thermal stress, it is possible to remove harmful elements such as cracks remaining on the glass edge without using hydrofluoric acid and a reinforcing agent.

However, in this method, the uniform heat distribution of the heating element 10 is important. When the center of the heating element 10 is displaced from the center of the heating coil 30 as shown in FIG. 3, the portion close to the coil 30 has a high temperature. The temperature away from the coil 30 is shown. When chamfering the glass substrate 20 with the heating element 10 having such a temperature distribution, there is a problem that chamfering is not performed uniformly.

However, in the present invention, by matching the center of the heating element 10 and the center of the heating coil 30, the heating element 10 to have a uniform temperature distribution, it is uniform when used for chamfering the glass substrate 20 Allow chamfering.

Induction heating apparatus according to an embodiment of the present invention includes a power supply, a heating coil and a position correction unit.

4 is a plan view of an induction heating apparatus according to an embodiment, and FIG. 5 is a left side view of the induction heating apparatus according to an embodiment of the present invention.

The power supply 40 supplies electric power to the heating coil 30 so that the heating unit 32 of the heating coil 30 can heat the heating target.

The heating coil 30 has a connection part 31 and a heating part 32.

The connection unit 31 may be connected to the power supply 40 to receive power from the power supply 40.

The connection part 31 includes a corrugated pipe 33 as illustrated in FIG. 6.

Corrugated pipe 33 is adjustable in length and can be adjusted up, down, left and right, it is possible to adjust the length and left and right according to the position movement of the position correction unit 50 to be described later. This will be described later in detail.

The heating unit 32 may perform heating by the power supplied through the connection unit 31.

The heating part 32 may be directly connected to the connection part 31 to be supplied with power, and may be indirectly supplied with power through a separate conductor therebetween.

The position correction part 50 is fixed to the corrugated pipe 33 reference heating part 32 side connection part 31, and is provided with the x-axis movement means 51 and the y-axis movement means 52. As shown in FIG.

The connection part 31 is connected and fixed to the power supply 40, and the position correction part 50 is fixed to the connection part 31 on the corrugated pipe 33 reference heating part 32. Accordingly, the length or left and right of the corrugated pipe 33 is adjusted according to the positional movement of the x-axis or y-axis moving means 52, but the heating part 32 is not changed with respect to the remaining part of the heating coil 30. The position can be adjusted.

In the case of the position correction unit 50, the moving means is not particularly limited, and the method of implementation is not limited as long as it is fixed to the site and can move the site on the x-axis and the y-axis.

According to one embodiment, as illustrated in FIGS. 7 and 8, the y-axis movement means 52 is fixed to the connection portion 31 on the heating part 32 side, and the y-axis movement means 52 is the x-axis. It can move along the y-axis according to the linear guide rail on the moving means 51. In such a case, the x-axis moving means 51 can move on the x-axis, and the y-axis moving means 52 is located on the x-axis moving means 51, so that the linear guide rail on the x-axis moving means 51 is located. Along the y-axis.

In terms of preventing movement of the corrugated pipe 33 up and down, the x-axis moving means 51 is preferably located on the fixed stage connected to the power supply 40 and moved in the x axis according to the linear guide rail on the fixed stage. It may be.

Further, according to another embodiment, on the contrary, the x-axis moving means 51 is fixed to the heating portion 32 side connection portion 31, and the x-axis moving means 51 is the y-axis moving means 52 It can also move along the x-axis according to the linear guide rail on.

In this case, on the contrary, the y-axis moving means 52 may be located on the fixed stage connected to the power supply 40 and move along the x axis along the linear guide rail on the fixed stage.

If one specific example of the x-axis and y-axis moving means 52 is described, for example, the x-axis moving means 51 moves in the x-axis according to the rotation of the first motor 51a and the first motor 51a. The first stage 51b may be provided. In addition, the y-axis moving means 52 may include a second stage 52b that moves in the y-axis according to the rotation of the second motor 52a and the second motor 52a.

In this case, the first stage 51b may move along the linear guide rail on the second stage 52b, or conversely, the second stage 52b may move along the linear guide rail on the first stage 51b.

Moreover, this invention provides the chamfering apparatus of the glass containing the said induction heating apparatus.

The chamfering apparatus of the glass of this invention includes the heat generating body 10 heated by the said induction heating apparatus and the heating coil 30, and chamfering glass.

As illustrated in FIG. 1, the heating element 10 may be positioned so that the heating part 32 of the induction heating apparatus is spaced apart from the heating element 10 by a predetermined distance to surround the heating element 10.

The heating element 10 is heated by induction heating, and it is possible to chamfer the glass by contacting it with a portion to be chamfered.

The chamfering device of the glass of the present invention can be adjusted so that the center of the heating element 10 coincides with the center of the heating part 32 by including an induction heating device that is easy to adjust the position of the heating part 32, Uniform chamfering is possible.

The chamfering device of glass of the present invention may further include an imaging device 60 and a control device 70 for ease of position adjustment.

The imaging device 60 picks up the heating element 10 and the heating coil 30.

Imaging is to obtain an image for calculating the degree of deviation of the center of the heating element 10 and the heating coil 30, in terms of obtaining an image that is easy to calculate the imaging device is the heating element 10 and the heating coil 30 ) May be located above or below, and preferably above or below the vertical.

The control device 70 calculates the degree to which the center of the heating element 10 and the center of the heating unit 32 of the heating coil 30 are displaced in the captured image received by the imaging device 60.

By calculating this, the center of the heating element 10 and the center of the heating coil 30 are shifted in the x-axis and y-axis directions, and the x-axis moving means 51 is moved in the opposite direction by a distance shifted in the x-axis direction. By moving the y-axis moving means 52 in the opposite direction by a distance shifted in the y-axis direction, the center of the heating element 10 and the center of the heating part 32 can be adjusted to coincide.

The present invention also provides a heating coil position correction method.

According to one embodiment of the present invention, first, the heating element 32 is positioned so that the heating part 32 of the induction heating apparatus is spaced apart from the heating element 10 by a predetermined distance to surround the heating element 10.

In such a case, induction heating may occur by the power supplied from the power supply 40, so that the heating element 10 may be heated.

Thereafter, the heating element 10 and the heating coil 30 are imaged.

This is to obtain an image for calculating the degree of deviation of the center of the heating element 10 and the heating coil 30.

Imaging is to obtain an image for calculating the degree of deviation of the center of the heating element 10 and the heating coil 30, the imaging is the heating element 10 and the heating coil 30 in terms of obtaining an easy to calculate image It may be performed on the upper side or the lower side of, and may be preferably performed on the vertical upper side or the vertical lower side.

Imaging may be performed through the imaging device 60 of the chamfering device including the induction heating device, but is not limited thereto.

Subsequently, the degree of misalignment between the center of the heating element 10 and the center of the heating coil 30 is calculated from the captured image.

Next, the x-axis or y-axis movement means 51, 52 are moved in accordance with the above-described degree of misalignment, and the center of the heating element 10 and the heating part 32 are aligned by adjusting the length and the left and right of the corrugated pipe 33. .

The calculation and the movement of the x-axis and y-axis moving means may be performed through the control device 70 of the chamfering device, but is not limited thereto.

Or more, to present a preferred embodiment in order to help the understanding of the present invention, these examples are not intended to limit the scope of the appended claims, but are merely to illustrate the invention, embodiments within the scope and spirit of the invention It is apparent to those skilled in the art that various changes and modifications can be made to the present invention, and such modifications and changes belong to the appended claims.

[Description of the code]

10: heating element 20: glass substrate

30: heating coil 31: connection portion

32: heating part 33: corrugated pipe

40: power supply source 50: position correction unit

51: x-axis vehicle

51a: first motor 51b: first stage

52: y-axis moving means

52a: second motor 52b: second stage

60: imaging device 70: control device

Claims (7)

Power supply; And A heating coil connected to the power supply source and having a connection part including a corrugated pipe and a heating part configured to perform heating by electric power supplied through the connection part from a power supply source; And And a position correction unit fixed to the crimp tube reference heating unit side connection unit and having an x-axis moving unit and a y-axis moving unit. Induction heating apparatus that can adjust the length and the left and right of the corrugated pipe according to the positional movement of the x-axis and y-axis moving means. The induction heating apparatus according to claim 1, wherein the y-axis moving means is fixed to the heating part side connection portion, and the y-axis moving means is movable in the y axis along the linear guide rail on the x-axis moving means. The induction heating apparatus according to claim 1, wherein the x-axis moving means is fixed to the heating part side connection portion, and the x-axis moving means is movable on the x axis along the linear guide rail on the y-axis moving means. The method according to claim 1, wherein the x-axis moving means has a first stage and a first stage moving in the x-axis in accordance with the rotation of the first motor, the y-axis moving means in accordance with the rotation of the second motor and the second motor An induction heating apparatus having a second stage moving in the y axis. Induction heating apparatus of any one of claims 1 to 4 and The chamfering apparatus of glass containing the heat generating body heated by a heating coil, and chamfering glass. The apparatus according to claim 5, further comprising: an imaging device for imaging the heating element and the heating coil; And And a control device for calculating an amount of misalignment between the center of the heating element and the center of the heating unit of the heating coil in the captured image received by the imaging device, and controlling the x-axis moving means or the y-axis moving means according to the calculated value. , Chamfering device of glass. Positioning the heating element such that the heating part of the induction heating apparatus of any one of claims 1 to 4 surrounds the heating element at a predetermined distance from the heating element; Imaging the heating element and heating coil; Calculating a degree to which the center of the heating element and the center of the heating unit of the heating coil are shifted from each other by the captured image; And And moving the x-axis or y-axis moving means in accordance with the misalignment degree to match the center of the heating element and the heating part by adjusting the length and the left and right of the corrugated pipe.

Images