TWM457608U - Side edge processing device for rigid brittle board - Google Patents

Description

Side briquetting device for hard brittle board

The present invention relates to a device for grinding a side of a glass plate and other hard brittle plates, and more particularly to grinding a cut edge of a glass substrate for a display panel used in a portable device or the like by a grinding wheel (rotary grinding wheel). Cutting device.

The glass substrate (hereinafter simply referred to as "substrate") used in the display panel of the portable device or the television receiver is cut into a predetermined size by utilizing the brittle cutting (dividing and cutting) of the glass. The mechanical shock-based cutting is, for example, a cut based on a scribe break, and the thermal shock-based cutting is, for example, a cut based on a laser beam. Small irregularities appear in the cut surface of the cut substrate, and the angle between the surface of the substrate and the cut surface forms sharp edges (edges), so that small gaps also occur. Therefore, in order to mainly remove the sharp ribs or notches, side processing called chamfering is generally performed.

The substrate is usually cut into a rectangular shape. As shown in FIG. 10, the side processing of the rectangular substrate is performed by fixing the substrate (hard brittle plate 1) to the table 2, and arranging the grinding wheels 3 and 3 on both sides of the table so that the table 2 is The grinding wheels 3 and 3 are relatively moved in a direction (Y-axis direction) parallel to the side edges 11 and 11 to be ground by the substrate.

Figure 12 is a view schematically showing one of such side processing apparatuses The main view of the example. The substrate is fixed to the table 2 by vacuum suction or the like. The table 2 is guided by the guide rail 21 in the vertical direction of the drawing (Y-axis direction), and is connected to the Y-axis feed screw 22 that is driven to rotate by a Y-axis feed motor (not shown) via the Y-axis feed nut 23 . . Only one of the grinding wheels 3 is attached to the end of the grinding wheel shaft 32 integral with the rotor shaft of the grinding wheel motor 31 mounted on the tool table 4. The tool table 4 is guided by a linear guide 42 provided in the width direction of the substrate (the X-axis direction in the horizontal direction of the drawing) provided in the lift table 41, and is coupled to the X via the X-axis feed nut 45 (see FIG. 2). The shaft feed screw 44 is driven by an X-axis feed motor 43 mounted on the lift table 41. The elevating table 41 is mounted on a column (not shown) so as to be movable in the vertical direction (Z-axis direction), and is coupled to the Z-axis feed screw 47 driven by the elevating motor 46 via a Z-axis feed nut (not shown). . The X-axis feed motor 43 and the lift motor 46 are servo motors that are controlled by a digital (NC) device 5 via servo amplifiers 51, 52, respectively.

The side 11 of the substrate is fixed to the table 2 in the Y-axis direction, and the lifting table 41 and the tool table 4 are moved under the control of the number (NC) to set the side of the grinding wheel 3 relative to the substrate 11 in the Z-axis direction and X. The relative position in the axial direction, in this state, the table 2 is moved in the Y-axis direction, whereby the side 11 of the substrate is machined by the grinding wheel 3. Instead of causing the table 2 to travel, the column supporting the tool table 4 can be moved in the Y-axis direction. Further, instead of providing the lifting platform 41 on the tool table 4 side, a lifting device for lifting and lowering the table 2 may be provided.

As the grinding wheel 3, a molding grinding wheel having a trapezoidal groove 33 on the outer circumference as shown in Fig. 12 or a grinding wheel shaft 32 and 32 on the upper and lower sides parallel to the side edge 11 of the substrate as shown in Fig. 11 are often attached. many A plurality of grinding wheels of a circular plate grinding wheel 34.

When the position of the grinding wheel 3 is fixed to the Z-axis direction and the X-axis direction orthogonal to the Y-axis direction which is the relative feed direction of the grinding wheel 3 in this manner, and the side processing is performed, the side can be processed. The edge is processed to be an accurate straight side edge which is chamfered by removing the unevenness and sharp edges caused by the cutting.

Further, the machining of the cut section 12 on the side is performed by the bottom surface of the trapezoidal groove 33 if the grinding wheel is formed, and the upper and lower grinding wheel shafts 32 and 32 are moved to the same if it is a multi-grinding wheel. When the substrate has the same height, the disk grinding wheel 34 is brought into contact with the cut surface 12 of the substrate, thereby performing processing.

Further, for a rounded trapezoidal shape (corner shape) or a substrate whose side is curved, the grinding wheel is moved in such a manner as to wrap around the table, or the grinding wheel is controlled in synchronization with the rotation of the vertical axis around the table. The X-axis direction (corresponding to the radial direction of the polar coordinates whose origin is the center of rotation of the table) is processed.

On the other hand, in a mobile phone or the like that pays particular attention to light weight, the display panel has also become large. In addition, in a portable device or an electronic book or a display panel of a personal computer represented by an iPad (registered trademark), a touch panel with a touch sensor has also become a mainstream. In such a small-sized portable device, since weight reduction and design are emphasized, it is required to reduce the thickness of the substrate, and how to avoid the reduction in strength due to thinning has become an important issue. Further, in the touch panel, since the panel is directly contacted, the strength of the substrate is required, and how to increase the strength of the panel without increasing the thickness of the substrate becomes an important issue.

Moreover, in the touch panel, the cover glass for arranging the contact sensor is eliminated, and the technical progress is made in the direction in which the contact sensor is disposed on the display panel itself, due to the loss of the cover glass having the reinforcing function, Therefore, the strength required for the substrate of the display panel becomes larger.

Patent Document 1: Japanese Patent Laid-Open No. Hei 10-113855

Patent Document 2: Japanese Laid-Open Patent Publication No. 2000-52233

Patent Document 3: Japanese Laid-Open Patent Publication No. 2006-305661

However, there is a limit in terms of thinning and strength improvement of the substrate by improvement of the material, and there is a risk of damage such as cracks on the panel when the display panel is transported, when the device is assembled, or even when the user uses it. Increase.

The present invention has been made in an effort to suppress an increase in cracks caused by a reduction in thickness of a display panel, etc., and an object of the present invention is to provide a side edge processing for preventing a substrate for a display panel which has been conventionally ignored. The technical solution caused by the reduction in strength.

The side processing device of the rigid fragile plate of the present invention solves the above problems by the side processing device of the hard brittle plate comprising: a table 2 for fixing the rigid brittle plate 1; and the upper portion of the table a grinding wheel 3 whose surface is located at substantially the same height and disposed on the side of the table 2; and a position setting unit that positions the grinding wheel in the X-axis direction orthogonal to the side 11 of the rigid brittle plate 1 fixed to the table 2 And a Y-axis feeding device for relatively moving the grinding wheel 3 relative to the table 2 in a direction parallel to the side edge 11, in the side processing device of the hard brittle plate, the position setting unit is provided with: a grinding wheel 3 Corresponding to the command value of the digital device 5 A position defining unit that defines the position; and a biasing unit that urges the grinding wheel 3 toward the defined position and urges the grinding wheel 3 toward the rigid fragile plate 1 fixed to the table 2 with a predetermined force.

The position setting unit may include: an X-axis feed motor 43 controlled by the digital device 5; a clearance δ interposed in the force transmission system from the X-axis feed motor to the grinding wheel 3; The urging means (for example, the cylinder 6) for biasing the grinding wheel toward the rigid brittle plate 1 fixed to the table 2 by the position on the side of the grinding wheel 3.

Further, the position setting unit may include: an X-axis feed motor 43 controlled by the digital device 5; and a direction in which the grinding wheel 3 of the X-axis feed motor 43 is separated from the rigid fragile plate 1 fixed to the table 2. The maximum torque limit is a maximum current setter that is smaller than the maximum torque in the direction in which the grinding wheel 3 is advanced toward the hard brittle plate.

Further, the position setting unit may include: a tool table 4 that performs position setting by the X-axis feed motor 43 controlled by the digital device 5; and an elastic body 35 that is interposed in the force transmission system from the tool table to the grinding wheel 3 36.

(this new role)

In the prior art, the relative positional relationship between the table 2 to which the hard brittle plate 1 to be processed is fixed and the grinding wheel 3 for processing the side edge 11 of the hard brittle plate is held at the set position for side processing. In the device, it is predicted that when the convex portion of the fine uneven portion or the corner portion of the notch of the side of the hard brittle sheet which is cut due to the cutting enters the contact portion with the grinding wheel 3, a sharp change in the processing resistance is caused. The machining force in the grinding surface after the side machining is changed, especially the machining force is sharply increased. The part produced a minute crack that could not be visually confirmed. In addition, it is considered that the minute crack grows due to the bending stress acting on the hard brittle sheet during transportation or assembly and the bending stress generated by contact with the hard brittle sheet during use, and is a large crack causing damage to the hard brittle sheet. .

On the other hand, according to the present invention, when the convex portion or the corner portion of the notch which is a sharp increase in the machining load enters the contact portion with the grinding wheel 3, the grinding wheel 3 is pushed back in the direction away from the hard brittle plate to By easing the increase in the processing load, it is possible to prevent micro cracks from being caused by abrupt changes in the processing load, and to increase the strength of the appearance of the hard brittle sheet, thereby being able to cope with the thinning of the display panel or the touch panel. .

According to the present invention, the side of the hard brittle sheet is processed by a load equal to or lower than a predetermined processing load set by a digital device or the like. Therefore, even if there are irregularities or notches on the side of the hard brittle sheet to be processed, there is no hard brittleness. Since the plate acts at a force equal to or higher than the predetermined machining load, it is processed close to the grinding process, and the roughness of the machined surface is improved, and micro cracks are prevented from occurring.

The strength of the substrate composed of the hard brittle sheet which has been subjected to the side processing by the apparatus of the present invention is increased as compared with the substrate of the same material and the same thickness which has been processed by the conventional apparatus. Therefore, it is possible to improve the strength of the external force generated by the substrate after the side processing against the conveyance or the assembly or the use of the substrate, and the weight of the portable device that can be thinned by the display panel and the response panel can be improved. The effect of improving the strength of the touch panel.

1‧‧‧hard brittle board

2‧‧‧Workbench

3‧‧‧ grinding wheel

4‧‧‧Tools

5‧‧‧Digital (NC) device

6‧‧‧ cylinder

11‧‧‧ side

12‧‧‧ cut section

21‧‧‧ rails

22‧‧‧X-axis feed screw

23‧‧‧X-axis feed nut

31‧‧‧Wheel motor

32‧‧‧Wheel axle

33‧‧‧Trapezoidal slot

34‧‧‧round plate grinding wheel

35, 36‧‧‧ Elastomers

41‧‧‧ Lifting table

42‧‧‧Line guides

43‧‧‧X-axis feed motor

44‧‧‧X-axis feed axis feed screw

45‧‧‧X-axis feed nut

46‧‧‧ Lift motor

47‧‧‧Z-axis feed screw

48‧‧‧Line guides

51, 52‧‧‧ servo amplifier

53‧‧‧Max current setter

55‧‧‧ bracket

56‧‧‧ fitting holes

57‧‧‧ keys

58‧‧‧Flange

59‧‧‧stop

61‧‧‧ piston rod

A‧‧‧ instruction value

B‧‧‧ feedback value

Δ‧‧‧ clearance

Fig. 1 is a schematic front view showing a main part of Embodiment 1.

Fig. 2 is a schematic plan view showing a main part of Embodiment 1.

Fig. 3 is a partial cross-sectional view showing a portion in which a play is provided.

Fig. 4 is a schematic front view showing a main part of Embodiment 2.

Fig. 5 is a schematic plan view showing a main part of Embodiment 2.

Fig. 6 is a schematic front view showing a main part of Embodiment 3.

Fig. 7 is a perspective view showing a main part of Embodiment 4.

Fig. 8 is a perspective view showing a main part of Embodiment 5.

Fig. 9 is a front elevational view showing the main part of the embodiment 6.

FIG. 10 is a perspective view showing an example of side processing.

Fig. 11 is a front view showing another example of the grinding wheel.

Fig. 12 is a schematic front view showing a main part of a side processing device.

Hereinafter, embodiments of the present invention will be specifically described with reference to the accompanying drawings. The side processing device of the present invention is configured such that the relative position or relative movement of the grinding wheel 3 with respect to the processed hard brittle plate 1 is set in the digital device 5 when it exceeds the X-axis direction of a predetermined value previously recorded in the digital device 5. When a machining load is applied to the grinding wheel 3, the grinding wheel 3 moves in a direction away from the hard brittle board 1.

In the first aspect shown in Figs. 1 to 5, the clearance δ is provided in the middle of the feed transmission system from the X-axis feed motor 43 to the grinding wheel 3, and the cylinder 6 is provided, which has a predetermined force. The grinding wheel 3 is biased toward the rigid brittle plate 1.

In the second aspect shown in FIG. 6, the X-axis feed motor 43 takes a torque limit different in the forward direction and the backward direction of the grinding wheel 3 to maintain the position of the grinding wheel 3. According to the current value applied to the X-axis feed motor 43, the amount of force is set so that the grinding wheel 3 can be held at the set position against the machining load. Therefore, the feedback value b is set such that the direction in which the grinding wheel 3 retreats is resisted by a weak current value, and the direction in which the grinding wheel 3 advances is resisted with a strong current value.

In the third aspect shown in FIGS. 7 to 9, the elastic bodies 35 and 36 are interposed in the middle of the force transmission system from the tool table 4 on which the grinding wheel is mounted to the grinding wheel 3, and the elastic bodies 35 and 36 can make the grinding wheel 3 It moves in the direction away from the hard brittle board 1. In this case, a metal grinding wheel excellent in rigidity and wear resistance can be used as the grinding wheel 3. Further, it is preferable to use an anisotropic elastic body that prevents or reduces deformation of the grinding wheel 3 in the advancing direction as the elastic bodies 35, 36, or a stopper for preventing deformation of the grinding wheel 3 in the advancing direction.

(Example 1)

1 to 3 are views showing a first embodiment of the present invention, and are examples according to the first aspect. Hereinafter, the components that have been described in FIG. 12 are denoted by the same reference numerals as those in FIG. 12, and the description thereof will be omitted.

In the first embodiment, the X-axis feed nut 45 screwed to the X-axis feed screw 44 without a gap is movably inserted in the axial direction so as to be fitted in the X-axis direction provided in the bracket 55. The hole 56 is provided with a key 57 for fixing the relative rotation of the X-axis feed nut 45 and the fitting hole 56. Further, a play δ is formed between the flange 58 on the X-axis feed nut 45 side and the stopper 59 on the bracket 55 side. That is, the X-axis feed nut 45 is fixed to The bracket 55 of the tool table 4 is coupled so as to be capable of moving the clearance δ in the axial direction of the lead screw 44 along the X-axis, and is not rotatable relative to each other. The clearance δ is set to a clearance larger than the size of the unevenness that may be generated at the side 11 of the workpiece to be processed.

The tool table 4 is biased toward the hard brittle plate 1 by the cylinder 6. The cylinder 6 is mounted on the elevating table 41 in the X-axis direction with the piston rod 61 advancing and retracting direction, and the distal end of the piston rod 61 is coupled to the tool table 4, and the tool table 4 is supplied to the head side of the cylinder to face the grinding wheel 3 toward the rigid brittle plate. 1 Pressurized air. The stroke of the piston rod 61 is larger than the movement stroke of the tool table 4 based on the X-axis feed motor 43.

In the first embodiment configured as described above, the bracket 55 is pressed against the rigid fragile plate 1 by the urging force of the air cylinder 6 so that the stopper portion 59 of the bracket 55 is pressed against the flange 58 of the X-axis feed nut 45. In the state, the tool table 4 is used to position the grinding wheel 3. Further, in this state, the hard brittle sheet 1 is moved relative to the grinding wheel 3 to process the side edge 11 of the hard brittle sheet. In this process, when a machining load of a predetermined force or more determined by the pressure of the pressurized air supplied to the cylinder 6 is applied to the grinding wheel 3 from the hard brittle plate 1, the piston rod 61 is pushed back, so that the tool table 4 is Thereby, the grinding wheel 3 is moved in a direction away from the side edge 11 of the hard brittle board, and the processing load acting on the hard brittle board is alleviated. Thereby, a large processing load is prevented from acting on the grinding surface of the hard brittle sheet, thereby preventing cracks from being generated due to a sharp increase in the processing load.

(Example 2)

4 and 5 are views showing a second embodiment of the present invention, which is an embodiment belonging to the first embodiment. This embodiment 2 is on the tool table 4 and the grinding wheel motor An example in which the clearance δ is provided between 31, the grinding wheel motor 31 is attached to the tool table 4 via the linear guide 48, and the stroke of the linear guide 48 is comparable to the clearance δ provided in the X-axis direction of the tool table 4. Short trip. The grinding wheel motor 31 is coupled to the piston rod 61 of the cylinder 6 of the short stroke mounted on the tool holder 4, and the grinding wheel motor 31 is oriented toward the grinding wheel 3 with a predetermined urging force by the pressurized air supplied to the head side of the cylinder. The brittle board 1 is forced.

In the second embodiment, the grinding wheel motor 31 is pressed against the stroke end of the linear guide 48 on the side of the rigid brittle plate 1 by the urging force of the cylinder 6, and the grinding wheel motor 31 and the grinding wheel 3 are performed. The position is set to process the side edges 11 of the rigid brittle board. In this process, when a machining load of a predetermined force or more determined by the pressure of the pressurized air supplied to the cylinder 6 is applied from the hard brittle plate 1 to the grinding wheel 3, the piston rod 61 is pushed back, so that the grinding wheel motor 31 is pushed back. Therefore, the grinding wheel 3 is moved in the direction away from the side edge 11 of the hard brittle plate, the processing load acting on the hard brittle plate is alleviated, and cracking due to a sharp increase in the processing load is prevented.

Further, in the above-described first and second embodiments, the air cylinder 6 is used as the biasing means, but the attractive force of the elastic body such as a spring or the magnet can be used.

(Example 3)

Fig. 6 is a view showing a third embodiment of the present invention, and is an embodiment belonging to the second aspect. The digital device 5 controls the X-axis feed motor 43 via the servo amplifier 51, and the feedback value b of the rotation angle of the X-axis feed motor 43 is sent to the servo amplifier 51. The servo amplifier 51 controls the current applied to the X-axis feed motor 43 so that the feedback value b and the command value a from the digital device 5 In agreement, the rotation angle of the X-axis feed motor 43 is thereby maintained, thereby maintaining the position of the grinding wheel 3. In the processing of the rigid brittle plate 1, when a machining load in the direction in which the grinding wheel 3 is retracted acts, the servo amplifier 51 applies a torque in the direction in which the grinding wheel 3 advances to the X-axis feed motor 43, so that the grinding wheel 3 is held at The location indicated.

Therefore, a maximum current setter 53 for limiting the current applied to the X-axis feed motor 43 is provided to limit the maximum value of the current flowing in the direction in which the grinding wheel 3 advances, thereby restricting the X-axis feed motor When the machining load of a predetermined value or more corresponding to the maximum torque is applied to the grinding wheel 3 set at the instructed position, the X-axis feed motor 43 cannot generate a rotation against the machining load. Therefore, the X-axis feed motor 43 is forcibly rotated by the machining load, so that the grinding wheel 3 is moved in the direction away from the hard brittle plate 1, and an excessive machining load is prevented from acting on the hard brittle plate 1, thereby preventing the The grinding surface is cracked.

1 to 5, an example in which a rotary motor is used as the X-axis feed motor 43 is shown. However, a linear motor can be used to set the position of the grinding wheel 3 in the X-axis direction. In this case, The same effects as described above can also be obtained by the same apparatus as described above.

(Example 4)

Fig. 7 is a view showing a fourth embodiment of the present invention, and is an embodiment belonging to the third aspect. In the fourth embodiment, the grinding wheel motor 31 is attached to the tool table 4 via the plate-shaped elastic body 35. The other structure is the same as the conventional device shown in FIG. When the machining load is applied from the hard brittle plate 1 to the grinding wheel 3 whose position is set to the predetermined position by the X-axis feed motor 43, the elastic body 35 is deformed, and the grinding wheel 3 is separated from the hard brittle plate 1 with the deformation. square Move to. By this movement, an excessive processing load is prevented from acting on the hard brittle sheet 1, thereby preventing cracks from occurring on the ground surface of the hard brittle sheet. If the elastic body 35 is an isotropic elastic body, the grinding wheel 3 moves in the direction in which the machining load acts, so that the machining load is reduced.

(Example 5)

Fig. 8 is a view showing a fifth embodiment of the present invention, and is an embodiment belonging to the third aspect. In the embodiment 6 and the embodiment 6 shown in Fig. 9, the elastic body 36 is interposed on the grinding wheel shaft 32. In the fifth embodiment shown in FIG. 8, the grinding wheel 3 is attached to the grinding wheel shaft 32 integral with the rotor shaft of the grinding wheel motor 31 in a cantilever state, and the elastic body 36 is clamped to the grinding wheel shaft 32.

(Example 6)

On the other hand, in the sixth embodiment of Fig. 9, the grinding wheel 3 is pivotally supported by bearings provided on both sides of the grinding wheel 3, and the elastic body 36 is interposed between the bearing and the grinding wheel 3. That is, both ends of the grinding wheel 3 are axially supported by the elastic body 36 on both sides of the grinding wheel shaft 32.

In either of the embodiments 5 and 6, when an excessive processing load is applied to the grinding wheel 3, the elastic body 36 is deformed, so that the grinding wheel 3 moves in a direction away from the hard brittle plate 1 to prevent the hardening. The side edges 11 of the brittle plates act on locally excessive machining loads to prevent cracking on the ground faces.

1‧‧‧hard brittle board

3‧‧‧ grinding wheel

4‧‧‧Tools

6‧‧‧ cylinder

31‧‧‧Wheel motor

32‧‧‧Wheel axle

41‧‧‧ Lifting table

43‧‧‧X-axis feed motor

61‧‧‧ piston rod

Claims (4)

A side processing device for a rigid brittle board, the side processing device of the rigid brittle board comprising: a table for fixing a hard brittle board; and a substantially equal height of the upper surface of the table and disposed on the table a side grinding wheel; a position setting unit that positions the grinding wheel in an X-axis direction orthogonal to a side of the rigid brittle plate fixed to the table; and the grinding wheel is aligned with respect to the table The Y-axis feeding device in which the sides are parallel to each other, wherein the side processing device of the rigid brittle plate is characterized in that the position setting unit includes: a position corresponding to a command value of the grinding wheel and the digital device a defined position defining unit; and a biasing unit that urges the grinding wheel toward the defined position and urges the grinding wheel toward the rigid frangible plate fixed to the table with a predetermined force. The side processing device for a rigid brittle plate according to claim 1, wherein the position setting unit includes: an X-axis feed motor controlled by the digital device; and a feed motor from the X-axis a play in the force transmission system to the grinding wheel; and a biasing device for biasing the grinding wheel toward the rigid brittle plate fixed to the table at a position closer to the grinding wheel side than the play. A side edge processing device for a rigid brittle plate according to claim 1, The position setting unit includes: an X-axis feed motor controlled by the digital device; and a maximum torque limit in a direction in which the X-axis feed motor separates the grinding wheel from the rigid fragile plate fixed to the table The maximum current setter is smaller than the maximum torque in the direction in which the grinding wheel is advanced toward the hard brittle plate. A side edge processing apparatus for a rigid brittle board according to claim 1, wherein the position setting unit includes: a tool table that performs position setting using an X-axis feed motor controlled by a digital device; and is attached to the slave The tool body is an elastomer to the force transfer system of the grinding wheel.