Device for measuring thickness of glass on line

Abstract

The utility model provides a device for measuring the thickness of glass on line, which comprises a glass conveying roller way (1), and is characterized in that a bracket (2) is bridged on the glass conveying roller way (1), a plurality of moving frames (3) which are correspondingly matched with each other are arranged on the bracket (2), an air cylinder (4) is arranged on each moving frame (3), the output end of each air cylinder (4) is connected with a longitudinal moving assembly (5), and the longitudinal moving assembly (5) is connected with the glass conveying roller way (1). A cantilever (6) is arranged on the longitudinal moving assembly (5), and one end of the cantilever (6) is connected with a measuring assembly (7). The device has a simple structure, is convenient to use, can detect the thickness change of the glass plate on line in real time, avoids greater waste caused by lagging due to process change and equipment failure of the calender, and reduces the workload of quality inspectors.

Description

Technical Field

[0001] The utility model relates to the field of glass production, in particular to a device for online measuring of glass thickness. Background Art

[0002] The calendering process causes changes in glass thickness during adjustments. The principle of calendering is that the pressure rod on the calendering machine applies pressure to the upper roller, reducing the gap between the upper and lower rollers. The hot molten glass flows out of the gap and cools, pressing it to a certain thickness.

[0003] The calendering roller expands and contracts at high temperatures. The glass plate has a low temperature at the edges and a thicker thickness in the horizontal direction, a high temperature in the middle and a thinner thickness. In the vertical direction, the gap between the calendering rollers increases and decreases as the calendering rollers rotate one circle, and the thickness changes periodically according to the length of the roller diameter.

[0004] In our company's actual production, according to customer technical requirements, the general production specification thickness is controlled within ±0.2mm. For example, when producing 2.0mm glass, the thickest point is controlled below 2.2mm and the thinnest point is controlled above 1.8mm.

[0005] However, due to factors such as head smashing, upper roller washing, thickness lifting, thickness pressing, melting temperature fluctuations, and abnormal operation of the self-pressing rod of the calender, the glass thickness can fluctuate greatly and needs to be remeasured. Quality inspectors measure the thickness by sampling and testing, and usually cannot adjust the glass thickness to the desired level in one go.

[0006] This results in significant waste of glass between the time it exits the annealing furnace's F zone and reaches the cold-end sampling station. In particular, malfunctioning calender self-pressing rods can cause substandard glass thickness for several hours, forcing the glass to flow directly to the next process, resulting in a significant waste of manpower and resources. Therefore, an online thickness measurement device is urgently needed to avoid this situation and reduce production losses. Utility Model Content

[0007] The utility model aims to overcome the deficiencies in the prior art and provides a device for online measuring the thickness of glass.

[0008] This application provides the following technical solutions:

[0009] A device for online measurement of glass thickness includes a glass conveyor roller and is characterized in that: a bracket is connected across the glass conveyor roller, a plurality of corresponding movable racks are provided on the bracket, a cylinder is provided on each movable rack, a longitudinal movable assembly is connected to the output end of the cylinder, a cantilever is provided on the longitudinal movable assembly, a glass thickness measuring assembly is connected to one end of the cantilever, and a control module is provided on the bracket to form an electrical signal connection with the glass thickness measuring assembly.

[0010] On the basis of the above technical solutions, the following further technical solutions can be provided:

[0011] The movable frame includes a group of groove wheels distributed on the cross beam of the frame, all the groove wheels are connected to the frame body on one side, and guide rails corresponding to the groove wheels are also provided on the cross beam of the frame.

[0012] The longitudinal movement component includes a base plate connected to the output end of the cylinder, a rectangular block is provided on the base plate, a groove body is provided on the rectangular block, a slider is provided in the groove body, and a bolt is provided on the groove body. One end of the bolt passes through the slider and corresponds to it. The slider is driven to move longitudinally in the groove body through the forward and reverse rotation of the bolt.

[0013] The glass thickness measuring assembly includes a main body, a longitudinal groove is provided in the main body, a longitudinally distributed spring is provided in the longitudinal groove, a moving block is connected to the lower end of the spring, a longitudinally distributed vertical rod is connected to the moving block, the lower end of the vertical rod passes through the longitudinal groove and extends to the bottom of the main body, and a roller is connected to the lower end of the vertical rod. A longitudinal displacement sensor is provided on the main body to form a dynamic sensing cooperation with the vertical rod, and the longitudinal displacement sensor forms an electrical signal transmission cooperation with the control module.

[0014] A ruler corresponding to the movable frame is provided on the bracket.

[0015] Utility model advantages:

[0016] The utility model has a simple structure and is easy to use. It can detect the thickness change of the glass plate online in real time, avoid greater waste caused by delayed detection due to process changes and calender equipment failures, and reduce the workload of quality inspectors. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional structural view of the utility model;

[0018] Figure 2 It is a side view of the utility model;

[0019] Figure 3 It is a top view of the utility model;

[0020] Figure 4 yes Figure 1 A-axis zoom in;

[0021] Figure 5 yes Figure 2 B-direction magnification in. DETAILED DESCRIPTION

[0022] like Figure 1-5As shown, a device for online glass thickness measurement includes a glass conveyor roller 1, a gate-shaped support 2 straddling the glass conveyor roller 1, and at least three corresponding movable frames 3 mounted on a crossbeam 2a of the support 2. A control module 8 with a touchscreen input is connected to a support column on one side of the support 2.

[0023] Each of the mobile frames 3 includes a guide rail 3c protruding from the upper / lower surface of the crossbeam 2a of the bracket 2. The guide rail 3c is distributed in the same direction as the crossbeam 2a. A pair of sheaves 3a are provided on each crossbeam 2a. All the sheaves 3a are connected to a frame body 3b on one side. The frame body 3b includes a vertical plate 13a. A group of pull rods 13b are connected to the surface of one side of the vertical plate 13a. One end of each pull rod 13b is connected to the corresponding sheave 3a through a bearing, so that

[0024] The grooved wheel can drive the frame to move when the guide rail moves. On two of the pull rods 13b on the upper side of the crossbeam 2a, a wheel frame 3d is installed. The wheel frame 3d is provided with a locking bolt 3e corresponding to the guide rail 3c.

[0025] A scale (not shown) is provided on the side wall of the crossbeam 2a along the width direction of the glass conveyor roller 1 so that the staff can clearly know where the frame 3b moves in the width direction of the glass conveyor roller 1 when pushing the frame 3b.

[0026] A cylinder 4 is mounted on the other side of the vertical plate 13a. The axis of the cylinder 4's output shaft is perpendicular to the surface of the glass sheet 9 being conveyed on the glass conveyor roller 1. A longitudinal motion assembly 5 is connected to the output end of the cylinder 4. This assembly comprises a base plate 4a connected to the output end of the cylinder 4. A rectangular block 4b is mounted on the base plate 4a. A groove 4c is formed in the rectangular block 4b. A corresponding slider 4d is positioned within the groove 4c. Guide blocks 4g extend from either side of the slider 4d.

[0027] A bolt 4f is installed on the groove body 4c. One end of the bolt 4f passes through the slider 4d and corresponds to it. The forward and reverse rotation of the bolt 4f drives the slider 4d to move longitudinally in the groove body 4c.

[0028] A cantilever 6 is fixedly attached to the slider 4d, with a glass thickness measuring assembly 7 connected to one end of the cantilever 6. The assembly comprises a rectangular, cubical body 7a, within which is a longitudinal slot 7b, within which is a longitudinally extending spring 7c. A movable block 7d is attached to the lower end of the spring 7c, which is movable within the slot 7b. A longitudinally extending vertical rod 7e is attached to the movable block 7d. A longitudinal displacement sensor 7g is mounted at the bottom of the body 7a, which forms a dynamic sensing relationship with the vertical rod 7e. The longitudinal displacement sensor 7g also communicates with a control module 8 for electrical signal transmission.

[0029] The lower end of the vertical rod 7e passes through the longitudinal slot 7b and extends to the bottom of the main body 7a. A rubber roller 7f is connected to the lower end of the vertical rod 7e.

[0030] Working process:

[0031] Before use, first determine the width of the glass plate 9 to be produced, manually push the roller to move the frame to the appropriate position, tighten the fixing bolts 13 to fix the frame, and lock the frame to prevent it from moving left and right.

[0032] Calibration: Open (vertically downward) the cylinder, the cylinder output shaft lowers the longitudinal moving component 5, and adjust the bolt 4f to make the roller 7f of the glass thickness measuring component 7 contact the upper end of the roller shaft on the roller. At this time, the longitudinal displacement sensor 7g will display the corresponding value according to the displacement of the adjusting screw. Adjust the value to 0 on the touch screen of the control module 8.

[0033] After calibration is complete, the cylinder resets, raising the longitudinal motion assembly 5. Wait until the glass sheet 9 passes over the roller conveyor before opening the cylinder to lower the longitudinal motion assembly 5. Roller 7f contacts the glass sheet surface. Driven by vertical rod 7e, the upward movement force of moving block 7d is transmitted to spring 7c, which reacts in the opposite direction, bringing roller 7f into contact with the top surface of glass sheet 9.

[0034] When the thickness of the glass sheet changes, the vertical rod 7e moves up and down, and the longitudinal displacement sensor 7g transmits a position signal based on the displacement to the control module, whose screen displays the value. The thickness value of the glass sheet 9 is displayed every 5 seconds. The three longitudinal displacement sensors connected to the three mobile frames 3 are aggregated to the control module's value for statistical average and range. The average value indicates the current average thickness of the glass; the range value can be used to determine changes in the curvature of the glass. Smaller extreme differences can be judged as normal fluctuations in glass thickness; larger extreme differences can be judged as abnormal fluctuations in glass curvature. If the thickness exceeds the threshold set in the control module, the alarm unit in the control module is triggered, and a photoelectric alarm is issued on the screen to notify the staff.

[0035] In actual production, the number of movable racks can be appropriately increased on the crossbeam 2a of the bracket 2 with a larger span according to the span.

Claims

1. A device for online measuring glass thickness, comprising a glass conveyor roller (1), characterized in that: A bracket (2) is connected across a glass conveying roller (1), a plurality of corresponding movable racks (3) are provided on the bracket (2), a cylinder (4) is provided on each movable rack (3), a longitudinal movable assembly (5) is connected to the output end of the cylinder (4), a cantilever (6) is provided on the longitudinal movable assembly (5), a glass thickness measuring assembly (7) is connected to one end of the cantilever (6), and a control module (8) is provided on the bracket (2) for forming an electrical signal connection with the glass thickness measuring assembly (7).

2. The device for online measuring glass thickness according to claim 1, characterized in that: The movable frame (3) includes a group of sheaves (3a) distributed on the crossbeam (2a) of the bracket (2), all the sheaves (3a) are connected to the frame body (3b) on one side, and a guide rail (3c) corresponding to the sheaves (3a) is also provided on the crossbeam (2a) of the bracket (2).

3. The device for online measuring glass thickness according to claim 1, characterized in that: The longitudinal movement component (5) includes a base plate (4a) connected to the output end of the cylinder (4), a rectangular block (4b) is provided on the base plate (4a), a slot body (4c) is provided on the rectangular block (4b), a slider (4d) is provided in the slot body (4c), and a bolt (4f) is provided on the slot body (4c), one end of the bolt (4f) passes through the slider (4d) and corresponds to it, and the slider (4d) is driven to move longitudinally in the slot body (4c) by the forward and reverse rotation of the bolt (4f).

4. The device for online measuring glass thickness according to claim 1, characterized in that: The glass thickness measuring assembly (7) comprises a main body (7a), a longitudinal groove (7b) is provided in the main body (7a), a longitudinally distributed spring (7c) is provided in the longitudinal groove (7b), a moving block (7d) is connected to the lower end of the spring (7c), a longitudinally distributed vertical rod (7e) is connected to the moving block (7d), the lower end of the vertical rod (7e) passes through the longitudinal groove (7b) and extends to the bottom of the main body (7a), and a roller (7f) is connected to the lower end of the vertical rod (7e), a longitudinal displacement sensor (7g) is provided on the main body (7a) and forms a dynamic sensing cooperation with the vertical rod (7e), and the longitudinal displacement sensor (7g) forms an electrical signal transmission cooperation with the control module (8).

5. The device for online measuring glass thickness according to claim 1, characterized in that: A scale corresponding to the movable frame (3) is provided on the bracket (2).

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