A device and method for detecting roller clamping force in substrate glass manufacturing

Abstract

The present invention belongs to the field of glass manufacturing, and discloses a device and method for detecting roller clamping force in substrate glass manufacturing, wherein the device comprises: at least one pair of rollers, several pairs of clamping members and a clamping force detection mechanism; the pair of rollers comprises a fixed roller and a floating roller; the pair of clamping members comprises a fixed roller clamping member and a floating roller clamping member; the fixed roller clamping member and the floating roller clamping member are respectively connected to the corresponding fixed roller and the floating roller; the clamping force detection mechanism comprises a limiter, a force sensor and a data processing unit; the force sensor is arranged between the fixed roller clamping member and the limiter; the force sensor is connected to the fixed roller clamping member or the limiter; the data processing unit is connected to the force sensor. The present invention finely controls the clamping force by setting a force sensor to detect the magnitude of the force applied by the fixed roller clamping member to the limiter, thereby avoiding the adverse effects caused by excessive or too small clamping force.

Description

Technical Field

[0001] The invention belongs to the field of glass manufacturing, and in particular relates to a device and method for detecting roller clamping force in substrate glass manufacturing. Background Art

[0002] The overflow down-draw method uses traction rollers to clamp and stretch the glass ribbon. The traction rollers are used in pairs and are divided into fixed rollers and floating rollers. When clamping and stretching the glass ribbon, the two rollers rotate in opposite directions and apply pressure to the glass to generate friction between the traction rollers and the glass surface, thereby driving the glass ribbon to move downward to reach the set thickness of the glass ribbon. During the stretching process, the traction roller applies pressure to the glass, that is, the roller clamping force. The magnitude of the clamping force will have an important impact on the quality of the glass and even affect the normal production order. The thickness of the substrate glass becomes thinner from 0.7mm, 0.5mm to 0.4mm, and its ability to resist external force damage is weakened. When the pressure is too high, it will cause damage to the glass and cracks. In severe cases, the glass ribbon will break and interrupt normal production. If the pressure is too low, the friction is insufficient, and the glass ribbon and traction rollers will slip. In the production of high-generation substrate glass, the traction roller adopts short roller technology. There are multiple pairs of short rollers working at the same time on both sides of the glass ribbon. The two pairs of short rollers at the same height on the two sides require the stretching of the glass ribbon to be as synchronous as possible to ensure the glass warping and stress quality, and the clamping force will affect the stretching effect. In addition, if the moving part of the clamping mechanism of the traction roller is abnormal, it may cause the traction roller to be virtual clamped, that is, the roller and the glass are not fully in contact, and the clamping force of the roller will also change, affecting the stretching effect.

[0003] Therefore, it is necessary to continuously detect the roller clamping force and finely control the clamping force, which can not only improve production efficiency and product quality, but also detect abnormal points in time and take countermeasures. Summary of the invention

[0004] The purpose of the present invention is to provide a device and method for detecting the clamping force of rollers in the manufacture of substrate glass, so as to solve the problem that the clamping force is too large and the glass is damaged, and the clamping force is too small and the roller and glass slip; the problem that the rollers clamp the glass in vain and affect the glass quality can also be discovered through the change of the clamping force, and the abnormal points can be dealt with in time.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A device for detecting roller clamping force in substrate glass manufacturing, comprising: at least one pair of rollers, several pairs of clamping members and a clamping force detection mechanism;

[0007] The pair of rollers includes a fixed roller and a floating roller; the pair of clamping members includes a fixed roller clamping member and a floating roller clamping member; the fixed roller clamping member and the floating roller clamping member are connected to the corresponding fixed roller and the floating roller respectively;

[0008] The clamping force detection mechanism includes a limiter, a force sensor and a data processing unit;

[0009] The force sensor is arranged between the fixed roller clamping member and the limiting member; the force sensor is connected to the fixed roller clamping member or the limiting member; and the data processing unit is connected to the force sensor.

[0010] A further improvement of the present invention is that the force sensor is a strain force sensor or a piezoelectric force sensor.

[0011] A further improvement of the present invention is that: the fixed roller clamping member includes a first connecting rod, a limit adjustment block and a fixed roller mounting seat; the first connecting rod includes two sections: a first straight connecting rod and a first L-connecting rod; the corner of the first L-connecting rod is hinged to the frame, one end of the first L-connecting rod is connected to the limit adjustment block, and the other end is hinged to one end of the first straight connecting rod; the other end of the first straight connecting rod is hinged to the fixed roller mounting seat; the fixed roller is installed in the corresponding fixed roller mounting seat.

[0012] A further improvement of the present invention is that: the limit adjustment block can move on the first L-type connecting rod; the limit member is arranged between the limit adjustment block and the corner of the first L-type connecting rod, and is located below the first L-type connecting rod.

[0013] A further improvement of the present invention is that: the floating roller clamping component includes a second connecting rod, a clamping force adjustment block and a floating roller mounting seat; the second connecting rod includes two sections: a second straight connecting rod and a second L-connecting rod; the corner of the second L-connecting rod is hinged to the frame, one end of the second L-connecting rod is connected to the clamping force adjustment block, and the other end is hinged to one end of the second straight connecting rod; the other end of the second straight connecting rod is hinged to the floating roller mounting seat; the clamping force adjustment block can move on the second L-connecting rod; and the floating roller is installed in the corresponding floating roller mounting seat.

[0014] A further improvement of the present invention is that the data processing unit is connected to a display device.

[0015] A further improvement of the present invention is that the display instrument is a distributed control system DCS and a digital display instrument.

[0016] A method for detecting roller clamping force in substrate glass manufacturing comprises the following steps:

[0017] The force sensor detects the magnitude of the force applied by the fixed roller clamping member to the limiting member;

[0018] The force detected by the force sensor when the fixed roller and the floating roller are not clamping the glass is used as the reference force f0, and the data is transmitted to the data processing unit;

[0019] The force detected by the force sensor when the glass is clamped by the fixed roller and the floating roller is f1, and the data is transmitted to the data processing unit;

[0020] The data processing unit calculates the difference △f between f0 and f1, where △f represents the clamping force of a pair of rollers on the glass;

[0021] The △f monitoring signal is displayed on the on-site display or transmitted to the computer control system for display and recording.

[0022] A further improvement of the present invention is that the detection range of the force sensor is 0-500N.

[0023] A further improvement of the present invention is that: a pair of rollers are respectively provided at the two edges of the substrate glass; a force sensor independently monitors the clamping force of a pair of rollers, compares the clamping forces of the two pairs of rollers at the same height, and controls the difference in the clamping forces to be less than a threshold value.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. By setting up force sensors to detect the roller clamping force in substrate glass manufacturing, the clamping force can be finely controlled to avoid adverse effects caused by excessive or insufficient clamping force, and abnormal points can be discovered in time to take countermeasures.

[0026] 2. By setting up force sensors, the clamping force of each pair of rollers can be monitored individually, and the clamping forces of two pairs of rollers at the same height at the edge of the glass ribbon can be compared and controlled to achieve better glass warping and stress quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0028] Figure 1 A front view of a device for detecting roller clamping force and glass position in substrate glass manufacturing;

[0029] Figure 2 A cross-sectional view of a device for detecting roller clamping force and glass position in substrate glass manufacturing;

[0030] Figure 3 A side view of a device for detecting roller clamping force and glass position in substrate glass manufacturing;

[0031] Figure 4 The present invention is a schematic diagram of the working of a fixed roller and a floating roller of a device for detecting roller clamping force in substrate glass manufacturing.

[0032] Figure numerals: 1-glass ribbon, 2-roller, 21-fixed roller, 22-floating roller, 3-fixed roller clamping member, 31-first connecting rod, 32-limit adjustment block, 33-fixed roller mounting seat, 4-floating roller clamping member, 41-second connecting rod, 42 clamping force adjustment block, 43-floating roller mounting seat, 5-limiting member, 6-force sensor, 7-data processing unit, 8-display. DETAILED DESCRIPTION

[0033] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0034] The following detailed description is an exemplary description, which is intended to provide further detailed description of the present invention. Unless otherwise specified, all technical terms used in the present invention have the same meaning as those generally understood by those skilled in the art to which the present invention belongs. The terms used in the present invention are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present invention.

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0036] Example 1

[0037] The present embodiment provides a device for detecting the roller clamping force in substrate glass manufacturing, comprising: a roller 2, a fixed roller clamping member 3, a floating roller clamping member 4, a limiter 5, a force sensor 6 and a data processing unit 7; the fixed roller clamping member 3 and the floating roller clamping member 4 are connected to the roller 2; a force sensor 6 is provided between the fixed roller clamping member 3 and the limiter 5; the force sensor 6 is connected to the fixed roller clamping member 3 or the limiter 5; and the data processing unit 7 is connected to the force sensor 6.

[0038] The force sensor 6 is a strain sensor or a piezoelectric force sensor.

[0039] The rollers 2 are at least one pair, including a fixed roller 21 and a floating roller 22 ; the fixed roller clamping member 3 is connected to the fixed roller 21 , and the floating roller clamping member 4 is connected to the floating roller 22 .

[0040] The fixed roller clamping member 3 includes a first connecting rod 31, a limit adjustment block 32 and a fixed roller mounting seat 33; the first connecting rod 31 includes two sections: a first straight connecting rod and a first L connecting rod; the corner of the first L connecting rod is hinged to the frame, one end of the first L connecting rod is connected to the limit adjustment block 32, and the other end is hinged to one end of the first straight connecting rod; the other end of the first straight connecting rod is hinged to the fixed roller mounting seat 33; the fixed roller 21 is installed in the corresponding fixed roller mounting seat 33. The first L connecting rod can rotate around the hinge point, and then pull or push the fixed roller mounting seat 33 to move left and right through the hinged first straight connecting rod to adjust the position of the fixed roller mounting seat 33 and the fixed roller 21. The limiter 5 is arranged between the limit adjustment block 32 and the corner of the first L connecting rod, and is located below the first L connecting rod, and is used to support and limit the first connecting rod 31, and control the moving range of the fixed roller mounting seat 33 and the fixed roller 21. The limit adjustment block 32 can move left and right on the first L-type connecting rod. Usually, the limit adjustment block 32 is arranged at the end of the first connecting rod 31, so as to achieve the best effect of limiting the position of the fixed roller 21.

[0041] The floating roller clamping member 4 includes a second connecting rod 41, a clamping force adjustment block 42 and a floating roller mounting seat 43; the second connecting rod 41 includes two sections: a second straight connecting rod and a second L connecting rod; the corner of the second L connecting rod is hinged to the frame, one end of the second L connecting rod is connected to the clamping force adjustment block 42, and the other end is hinged to one end of the second straight connecting rod; the other end of the second straight connecting rod is hinged to the floating roller mounting seat 43; the clamping force adjustment block 42 can move on the second L connecting rod; through the movement of the clamping force adjustment block 42, the second L connecting rod is driven to rotate around the hinge point, and then the floating roller mounting seat 43 is driven to move and adjust the clamping force through the hinged second straight connecting rod. The floating roller 22 is installed in the corresponding floating roller mounting seat 43.

[0042] The data processing unit 7 is connected to a display device 8 .

[0043] The display instrument 8 includes a DCS and a digital display instrument.

[0044] Example 2

[0045] A method for detecting roller clamping force in substrate glass manufacturing comprises the following steps:

[0046] The force sensor 6 is disposed between the fixed roller clamping member 3 and the limiter 5 to detect the magnitude of the force applied by the fixed roller clamping member 3 to the limiter 5;

[0047] The force detected when the fixed roller 21 and the floating roller 22 are not clamping the glass is used as the reference force f0, and the data is transmitted to the data processing unit 7;

[0048] The force detected when the fixed roller 21 and the floating roller 22 clamp the glass is f1, and the data is transmitted to the data processing unit 7;

[0049] The data processing unit 7 calculates the difference △f between f0 and f1, where △f represents the clamping force of the roller 2 on the glass;

[0050] The monitoring signal of △f is displayed on the digital display instrument 8 on site or transmitted to the computer control system for display and recording.

[0051] The detection range of the force sensor 6 is 0-500N.

[0052] like Figures 1 to 3 As shown, there are multiple pairs of rollers 2 at two sides of the glass ribbon 1 that clamp the glass ribbon 1 and work simultaneously. When clamping the glass ribbon 1 and stretching it, each pair of rollers 2 at the edge is divided into a fixed roller 21 and a floating roller 22. The fixed roller 21 is stationary, and the floating roller 22 approaches the glass ribbon 1 and pushes the glass ribbon 1 to contact the fixed roller 21, so that the fixed roller 21 and the floating roller 22 rotating in opposite directions clamp the glass ribbon 1 and drive the glass ribbon 1 to move downward.

[0053] In the fixed roller clamping member 3, the limit adjustment block 32 installed on the first connecting rod 31 cooperates with the limit member 5 to determine the position of the first connecting rod 31, thereby fixing the position of the fixed roller mounting seat 33 and the fixed roller 21 connected thereto through the bearing. The limit adjustment block 32 can move along the axis on the first connecting rod 31. Usually, the limit adjustment block 32 is at the end of the first connecting rod 31 to maximize the downward pressure. The height of the limit member 5 can be adjusted to adapt to the required position of the fixed roller 21.

[0054] When the floating roller clamping member 4 is working, under the action of the clamping force adjustment block 42, the floating roller mounting seat 43 and the floating roller 22 approach the glass ribbon 1 and push the glass ribbon 1 to contact the fixed roller 21, so that the fixed roller 21 and the floating roller 22 rotating in opposite directions clamp the glass ribbon 1 and drive the glass ribbon 1 to move downward. The position of the clamping force adjustment block 42 on the second connecting rod 41 determines the clamping force of the roller 2 on the glass ribbon 1. The mechanical formula can be used to calculate the magnitude of the clamping force, but the clamping member is not completely regular in shape, and the resulting clamping force has a certain error.

[0055] like Figure 4 As shown, a force sensor 6 is arranged between the first connecting rod 31 and the limiter 5 to detect the magnitude of the force applied by the fixed roller clamping member 3 to the limiter 5. The force detected when the fixed roller 21 and the floating roller 22 do not clamp the glass ribbon 1 is taken as the reference force f0, and the force detected when the fixed roller 21 and the floating roller 22 clamp the glass ribbon 1 is f1. The information is processed by the data processing unit 7 to calculate the difference △f between the reference force f0 and f1, and △f represents the clamping force of the roller 2 on the glass ribbon 1. The monitoring signal of △f is displayed on the digital display instrument 8 on site or transmitted to the computer control system for display and recording.

[0056] In addition to monitoring the clamping force of each pair of rollers 2 individually, the clamping force of two pairs of rollers 2 at the same height of the edge of the glass ribbon 1 can also be compared and controlled to achieve better glass warping and stress quality.

[0057] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the above disclosed embodiments are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A device for detecting roller clamping force in substrate glass manufacturing, characterized in that: include: At least one pair of rollers (2), a plurality of pairs of clamping members and a clamping force detection mechanism; A pair of rollers (2) comprises a fixed roller (21) and a floating roller (22); a pair of clamping members comprises a fixed roller clamping member (3) and a floating roller clamping member (4); the fixed roller clamping member (3) and the floating roller clamping member (4) are respectively connected to the corresponding fixed roller (21) and the floating roller (22); The clamping force detection mechanism comprises a limiter (5), a force sensor (6) and a data processing unit (7); The force sensor (6) is provided between the fixed roller clamping member (3) and the limit member (5); the force sensor (6) is connected to the fixed roller clamping member (3) or the limit member (5); the data processing unit (7) is connected to the force sensor (6); The force sensor (6) is a strain force sensor or a piezoelectric force sensor; The fixed roller clamping member (3) comprises a first connecting rod (31), a limit adjustment block (32) and a fixed roller mounting seat (33); the first connecting rod (31) comprises two sections: a first straight connecting rod and a first L-shaped connecting rod; the corner of the first L-shaped connecting rod is hinged to the frame, one end of the first L-shaped connecting rod is connected to the limit adjustment block (32), and the other end is hinged to one end of the first straight connecting rod; the other end of the first straight connecting rod is hinged to the fixed roller mounting seat (33); the fixed roller is installed in the corresponding fixed roller mounting seat (33).

2. The device for detecting roller clamping force in substrate glass manufacturing according to claim 1, characterized in that: The limit adjustment block (32) is movable on the first L-type connecting rod; the limit member (5) is arranged between the limit adjustment block (32) and the corner of the first L-type connecting rod, and is located below the first L-type connecting rod.

3. The device for detecting roller clamping force in substrate glass manufacturing according to claim 1, characterized in that: The floating roller clamping member (4) comprises a second connecting rod (41), a clamping force adjustment block (42) and a floating roller mounting seat (43); the second connecting rod (41) comprises two sections: a second straight connecting rod and a second L-connecting rod; the corner of the second L-connecting rod is hinged to the frame, one end of the second L-connecting rod is connected to the clamping force adjustment block (42), and the other end is hinged to one end of the second straight connecting rod; the other end of the second straight connecting rod is hinged to the floating roller mounting seat (43); the clamping force adjustment block (42) can move on the second L-connecting rod; the floating roller is mounted in the corresponding floating roller mounting seat (43).

4. The device for detecting roller clamping force in substrate glass manufacturing according to claim 1, characterized in that: The data processing unit (7) is connected to a display device (8).

5. The device for detecting roller clamping force in substrate glass manufacturing according to claim 4, characterized in that: The display instrument (8) is a distributed control system DCS and a digital display instrument.

6. A method for detecting roller clamping force in substrate glass manufacturing, based on a device for detecting roller clamping force in substrate glass manufacturing according to any one of claims 1 to 5, characterized in that: The following steps are involved: The force sensor (6) detects the magnitude of the force applied by the fixed roller clamping member to the limiting member (5); The force detected by the force sensor (6) when the fixed roller (21) and the floating roller (22) are not clamping the glass is used as a reference force f0, and the data is transmitted to a data processing unit (7); When the glass is clamped by the fixed roller (21) and the floating roller (22), the force detected by the force sensor (6) is f1, and the data is transmitted to the data processing unit (7); The data processing unit (7) calculates a difference △f between f0 and f1, where △f represents the clamping force of the pair of rollers (2) on the glass; The monitoring signal of Δf is displayed on a display device (8) on site or transmitted to a computer control system for display and recording.

7. A method for detecting roller clamping force in substrate glass manufacturing according to claim 6, characterized in that: The detection range of the force sensor (6) is 0-500N.

8. The method for detecting roller clamping force in substrate glass manufacturing according to claim 6, characterized in that: A pair of rollers (2) are respectively arranged at the two edges of the substrate glass; a force sensor (6) independently monitors the clamping force of a pair of rollers (2), compares the clamping forces of the two pairs of rollers (2) at the same height, and controls the difference in the clamping force to be less than a threshold value.

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