TW202411170A - Leveling device and leveling method - Google Patents

Abstract

Embodiments of the present application relate to the technical field of leveling, and aim to solve the technical problem of leveling curved glass and the risk of glass breaking. The embodiments of the present application provide a leveling device and a leveling method. The leveling device includes a stage; a plurality of indenters above the stage and spaced apart from each other; and a driving device for independently controlling each of the plurality of indenters to move in a direction close to or away from the stage.

Description

Leveling device and leveling method

The present application relates to the field of leveling technology, and more specifically, to a leveling device and a leveling method.

In conventional leveling devices, there is a risk of glass breakage when leveling curved glass.

The first aspect of the present application provides a leveling device. The leveling device comprises: a machine; a plurality of press heads arranged at intervals above the machine; and a driving device for independently controlling each of the press heads to move in a direction approaching or moving away from the machine.

The flattening device includes a plurality of pressure heads that are arranged at intervals and can be controlled independently. When the glass to be flattened is placed on the machine platform, the glass to be flattened is not directly in contact with the pressure heads on its entire surface due to the intervals between the pressure heads. This can alleviate the stress on the glass to be flattened during the flattening process. Moreover, for positions where the bending radius of the glass to be flattened is small and the curvature varies greatly, the stress on the glass to be flattened during the flattening process can be alleviated by setting the distance and number of pressure heads.

In some embodiments, the plurality of press heads are arranged in at least one row.

In some embodiments, the distance between each of the pressing heads and the machine platform is different.

The second aspect of the present application provides a leveling method using the leveling device described in the first aspect. The leveling method comprises: Placing the glass to be leveled on the machine platform; and Using the driving device, the plurality of pressing heads are pressed down in sequence to different positions of the glass to be leveled.

This leveling method utilizes the above-mentioned leveling device, so it has at least the same effect as the first aspect, and will not be described in detail here.

In some embodiments, the projections of the multiple pressing heads on the glass to be flattened do not completely cover the glass to be flattened, and the area of the projections of the multiple pressing heads on the glass to be flattened is greater than or equal to 57% of the area of the glass to be flattened.

In some embodiments, a maximum of 10 mm of the edge of the glass to be flattened is not pressed down by the plurality of pressing heads.

In some embodiments, the pressure head with the largest distance to the machine is located above the edge of the glass to be flattened and is the last one to be pressed down.

In some embodiments, the downward pressing distance of each of the pressing heads is the difference between the distance from the pressing head to the machine platform and the thickness of the glass to be flattened.

In some embodiments, in a direction perpendicular to the thickness of the glass to be flattened, the height difference between the highest point and the lowest point of the glass to be flattened is not less than 21.02 mm.

In some embodiments, the glass to be leveled is in the shape of a long strip, and the plurality of pressing heads press down in sequence along the length direction of the long strip.

The product features of large-size curved screens for cars are small curvature and varied geometry. In order to facilitate the ink printing process in the frame area of the curved screen, the curved glass needs to be flattened before the ink printing process. However, in the process of flattening the glass, the known flattening device is prone to extreme stress after flattening the area with small curvature of the glass. If the stress is too large, there is a risk of glass breakage during the flattening process of the curved glass.

In order to confirm whether there is a risk of glass breaking during the flattening process, the present application embodiment uses structural simulation to confirm the stress of the glass. By reducing the maximum stress value at the place with small curvature after the glass is flattened, the risk of glass breaking due to excessive tensile stress during the flattening process is reduced.

The following will clearly and completely describe the technical solutions in the embodiments of this application in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments.

As shown in FIG1 , the glass 10 to be flattened is a three-dimensional curved glass, which is a long strip bent into an S shape. The glass 10 to be flattened has a first surface 10a and a second surface 10b opposite to each other. The first surface 10a and the second surface 10b are coaxially curved surfaces. Along the length direction of the glass 10 to be flattened, the glass 10 to be flattened is divided into four parts, each of which has a different curvature value. Specifically, the glass 10 to be flattened includes a first part 11, a second part 12, a third part 13 and a fourth part 14. On one side of the first surface 10a, the curvature radii of the first part 11, the second part 12, the third part 13 and the fourth part 14 are 1500mm, 200mm, 198.7mm and 1498.7mm, respectively; on one side of the second surface 10b, the curvature radii of the first part 11, the second part 12, the third part 13 and the fourth part 14 are 1498.7mm, 198.7mm, 200mm and 1500mm, respectively. In the direction perpendicular to the thickness of the glass 10 to be flattened after being flattened, the height difference A between the highest point and the lowest point of the glass 10 to be flattened is 21.02mm. The glass 10 to be flattened has a large height difference. In other embodiments, the glass 10 to be flattened is a curved glass, not limited to an S-shaped one. The height difference between the highest point and the lowest point of the glass 10 to be flattened is not less than 21.02mm.

As shown in FIG2 , the known flattening device 30 includes a machine 31 and a pressing head 32. The projection of the pressing head 32 on the machine 31 covers 100% of the surface of the glass 10 to be flattened. After the pressing head 32 is pressed down, it directly contacts the upper surface of the glass 10 to be flattened and applies pressure to the glass 10 to be flattened toward the machine 21 to flatten the glass 10 to be flattened. However, since the curvatures at various positions of the glass 10 to be flattened are different, the stresses at different positions of the glass 10 to be flattened are uneven, especially the stresses in the areas with smaller curvature radius are larger. As shown in FIG3 , after the glass 10 to be leveled is leveled, the area with a smaller radius of curvature (roughly corresponding to the second portion 12 and the third portion 13) has the maximum stress, the maximum stress on the first surface 10a is 260.58 MPa, and the maximum stress on the second surface 10b is 255.7 MPa. It can be seen that in the conventional leveling device 30, since a pressure head 32 is used for leveling, the local stress of the glass is too large during the leveling process, and the risk of fragmentation is high.

In this regard, the embodiment of the present application improves the leveling device, especially optimizes the pressure head of the leveling device. Specifically, as shown in Figure 4, the leveling device 20 of the embodiment of the present application includes a machine 21 and a plurality of pressure heads 22 (i.e., a first pressure head 221, a second pressure head 222, and a third pressure head 223) spaced apart above the machine 21. The plurality of pressure heads 22 are spaced apart in a row in the horizontal direction. The leveling device 20 also includes a driving device (not shown). The driving device is used to independently control the movement of each pressure head 22 in a direction approaching or moving away from the machine 21. The driving device, for example, includes a motor and a controller connected to the motor. The controller can control the movement of the pressure head 22 by controlling the rotation of the motor.

In the embodiment of the present application, the vertical movement of each pressing head 22 can be independently controlled. That is, the plurality of pressing heads 22 are controlled in sections. When the glass 10 to be leveled is placed on the machine 21, the plurality of pressing heads 22 are arranged at intervals, so that the entire surface of the glass 10 to be leveled is not directly in contact with the pressing heads 22 when being pressed down, thereby alleviating the stress on the glass 10 to be leveled during the leveling process.

It is understandable that FIG4 is an example of three press heads 22. In other embodiments, the number of press heads 22 is not limited thereto. In addition, the area of the pressing surface of each press head 22 (i.e., the surface of the press head 22 facing the machine 21) and the spacing distribution between the press heads 22 can be adjusted according to the size of the glass 10 to be flattened. For example, corresponding to the position where the bending radius of the glass to be flattened is small and the curvature changes greatly, the pressing surface of the press head 22 can be made smaller and the number of press heads 22 can be increased.

In addition, although the distance between each pressing head 22 and the machine 21 can be adjusted by the driving device, in some embodiments, the distance between each pressing head 22 and the machine 21 is different. In particular, the distance between the pressing head 22 and the machine 21 is adjusted according to the different pressing sequences of the pressing heads 22.

Specifically, the pressure head 22 with the largest distance to the machine 21 is located above the edge of the glass 10 to be leveled, and is pressed down last. The main consideration for such design is that the pressure head 22 pressed down first may cause one end of the glass to be leveled to rise, and in order to prevent the raised end of the glass 10 to be leveled from hitting the pressure head 22 that is not pressed down, the pressure head 22 that is not pressed down, especially the pressure head 22 that is pressed down last (or the pressure head 22 used to press down the edge of the glass 10 to be leveled) is set to have a greater distance from the machine 21 than the distance from the pressure head 22 that is pressed down to the machine 21.

Specifically, in FIG4 , before pressing down, the distances from the first pressing head 221, the second pressing head 222, and the third pressing head 223 to the machine 21 are H1, H2, and H3, respectively. H3>H2>H1. Along the length direction of the glass 10 to be flattened, the plurality of pressing heads 22 are pressed down in sequence, and the pressing order is the first pressing head 221, the second pressing head 222, and the third pressing head 223. By making H3 greater than H1 and H2 greater than H1, it is possible to avoid the glass 10 to be leveled from being broken into pieces when it rises near one end of the third pressing head 223 when the first pressing head 221 is pressed down. Similarly, H3 is greater than H2, so that when the second pressing head 222 is pressed down, the glass 10 to be leveled from being broken into pieces when it rises near one end of the third pressing head 223.

Understandably, in other embodiments, H3=H2＞H1, by making the distance between the second pressing head 222 and the third pressing head 223 the same and both being greater than H1, it is also possible to avoid the flattened glass 10 from rising and hitting other pressing heads 22 when the first pressing head 221 is pressed down.

In addition, to ensure that the pressing head 22 has a sufficient contact area on the glass 10 to be flattened after pressing down, so as to ensure a complete flattening effect on the glass, the edge of the glass 10 to be flattened is at most 10 mm away from being directly contacted and pressed down by the plurality of pressing heads 22. In other words, the edge of the glass 10 to be flattened extends beyond the plurality of pressing heads 22 by a maximum of 10 mm.

Specifically, to ensure the leveling effect, after the glass 10 to be leveled is placed on the machine 21, the edge of the glass 10 to be leveled extends beyond the third pressing head 223 by a maximum of 10 mm (i.e., the distance X that the edge of the glass 10 to be leveled extends beyond the third pressing head is ≤ 10 mm). For example, X is 10 mm, 8 mm, 6 mm, 5 mm, 4 mm, 2 mm, or 1 mm. It is understandable that the edge of the glass 10 to be leveled may not extend beyond the pressing head 22, but may be covered by the projection of the pressing head 22.

The present application embodiment also provides a leveling method using the leveling device 20. The leveling method includes the following steps S1 and S2.

Step S1: Place the glass to be leveled on the machine.

Step S2: Using a driving device, a plurality of pressing heads are pressed down sequentially onto the glass to be leveled.

As shown in FIG. 4 , the projections of the plurality of pressing heads 22 on the glass 10 to be flattened do not completely cover the glass 10 to be flattened.

In some embodiments, the projection area of the plurality of pressing heads 22 on the glass 10 to be flattened is greater than or equal to 57% (e.g., 57%, 70%, 75%, 80%) of the area of the glass 10 to be flattened. By arranging the pressing heads 22 at intervals, the stress on the glass 10 to be flattened can be improved. The downward pressing distance of each pressing head 22 is the difference between the distance from the pressing head 22 to the machine 21 and the thickness of the glass 10 to be flattened (set as t), so that the glass 10 to be flattened becomes flat under the action of mechanical pressure.

The leveling process is described in detail below with reference to FIGS. 5 to 7 .

As shown in FIG5 , the first pressing head 221 moves downward toward the machine table 21 until it contacts the glass 10 to be flattened and presses down by a height of H1-t, and during the downward movement of the first pressing head 221, the second pressing head 222 and the third pressing head 223 remain stationary. In addition, due to the height setting of the third pressing head 223 and the second pressing head 222 from the machine table 21, even if the end of the glass 10 to be flattened close to the third pressing head 223 rises, it will not hit the third pressing head 223 and the second pressing head 222.

As shown in FIG6 , after the first pressing head 221 has completed pressing down, the second pressing head 222 moves downward and presses down to a height of H2-t. During this process, the first pressing head 221 can keep pressing down on the glass 10 to be leveled, while the third pressing head 223 remains stationary. In addition, due to the height setting of the third pressing head 223 from the machine platform 21, even if one end of the glass 10 to be leveled is raised near the third pressing head 223, it will not hit the third pressing head 223.

As shown in FIG7 , after the third pressing head 223 is pressed down, the glass 10 to be leveled is completely leveled. Moreover, since the distance X of the edge of the glass 10 to be leveled beyond the third pressing head 223 is very small, the leveling effect is good.

As shown in FIG8 , after being leveled by the leveling method of the embodiment of the present application, the stress maximum value is in the area with a smaller curvature, the stress maximum value at the first surface 10a is 208.94 MPa, and the stress maximum value at the second surface 10b is 200.04 MPa. That is, the maximum stress of the glass is reduced from the known 260 MPa to 208.94 MPa, a reduction of 20%, which improves the problem of uneven stress on the glass during the leveling process.

The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

10: Glass to be leveled 10a: First surface 10b: Second surface 11: First section 12: Second section 13: Third section 14: Fourth section 20, 30: Leveling device 21, 31: Machine 22, 32: Press head 221: First press head 222: Second press head 223: Third press head H1: Distance from first press head to machine H2: Distance from second press head to machine H3: Distance from third press head to machine X: Distance from edge of glass to be leveled extending beyond third press head

FIG. 1 is a three-dimensional schematic diagram of glass to be leveled.

FIG. 2 is a schematic structural diagram of a glass to be leveled being placed on a platform of a known leveling device.

FIG. 3 is a schematic diagram showing the stress state of the glass to be leveled after being leveled by a known leveling device.

FIG. 4 is a schematic structural diagram of a glass to be leveled being placed on a platform of a leveling device according to an embodiment of the present application.

FIG. 5 is a schematic diagram showing a state in which the first pressing head of the leveling device in FIG. 4 is pressed down onto the glass to be leveled.

FIG. 6 is a schematic diagram showing the state of the glass to be flattened after the second pressing head of the flattening device in FIG. 4 is pressed down.

FIG. 7 is a schematic diagram showing the state of the glass to be flattened after the third pressing head of the flattening device in FIG. 4 is pressed down.

FIG8 is a schematic diagram showing the stress state of the glass to be leveled after being leveled by a known leveling device.

10: Glass to be leveled

20: Leveling device

21: Machine

22: Pressure head

221: First pressure head

222: Second pressure head

223: The third pressure head

H1: Distance from the first pressure head to the machine

H2: Distance from the second pressure head to the machine

H3: Distance from the third pressure head to the machine

X: The edge of the glass to be leveled extends beyond the distance of the third press head

Claims (10)

A leveling device, comprising: a machine; a plurality of press heads spaced apart above the machine; and a driving device for independently controlling each of the press heads to move in a direction approaching or moving away from the machine. A flattening device as described in claim 1, wherein the plurality of pressure heads are arranged in at least one row. A flattening device as described in claim 1 or 2, wherein the distance from each of the pressing heads to the machine is different. A flattening method using a flattening device as described in any one of claims 1 to 3, comprising: Placing the glass to be flattened on the machine platform; and Using the driving device, the plurality of pressing heads are pressed down in sequence to different positions of the glass to be flattened. A flattening method as described in claim 4, wherein the projections of the multiple pressure heads on the glass to be flattened do not completely cover the glass to be flattened, and the area of the projections of the multiple pressure heads on the glass to be flattened is greater than or equal to 57% of the area of the glass to be flattened. A flattening method as described in claim 4, wherein a maximum of 10 mm of the edge of the glass to be flattened is not pressed down by the multiple pressing heads. A flattening method as described in claim 4, wherein the pressure head with the largest distance to the machine is located above the edge of the glass to be flattened and is the last one to press down. A flattening method as described in any one of claims 4 to 7, wherein the downward pressing distance of each of the pressing heads is the difference between the distance from the pressing head to the machine and the thickness of the glass to be flattened. A flattening method as described in any one of claims 4 to 7, wherein the height difference between the highest point and the lowest point of the glass to be flattened in a direction perpendicular to the thickness of the glass after flattening is not less than 21.02 mm. A leveling method as described in any one of claims 4 to 7, wherein the glass to be leveled is in the shape of a long strip, and the plurality of pressing heads press down sequentially along the length direction of the long strip.

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