Method for controlling edge width of electronic glass plate

Abstract

The invention discloses a method for controlling the edge width of an electronic glass plate, and relates to the technical field of glass production. According to the method, the current plate edge width is observed and judged through the camera, when the plate edge width needs to be adjusted, accurate and controllable adjustment of the plate edge width is achieved through an adjustment strategy set by the method and automatic adjustment of all parameters, and then the purposes of improving the process stability and the yield are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of glass production, and in particular to a method for controlling the edge width of an electronic glass plate. Background Art

[0002] In the production process of electronic glass, the plate width (glass plate width) is one of the basic technical requirements for daily production. The plate width is affected by many factors, including the amount of feed, the amount of pulling, the temperature of the tin bath, the speed of the edge drawing machine, the angle and other factors. In daily production, after determining the width of the glass plate to be produced, the above corresponding parameters are usually calculated and determined. When the glass plate is formed in the tin bath, its size is usually much larger than the plate width parameter to be produced. The excess part is called the plate edge. Because the thickness of the plate edge is uneven and the edge drawing wheel will form fine tooth-shaped indentations on the plate edge during the process of pulling the glass plate into shape, the plate edge can only be used for recycling and reproduction, and cannot be sold as a finished product.

[0003] When producing glass, a portion of broken glass needs to be added as raw material. Broken glass is usually formed by recycling the broken edges of glass plates. Since the process personnel can only ensure that the width and thickness of the glass plate are within the required range during daily parameter adjustments, they cannot accurately control the size of the plate edge, and often there is too much or too little broken glass. Excessive output of broken glass will cause waste of raw materials and reduce the glass yield rate. When there is too little broken glass, additional broken glass needs to be purchased, which increases costs. Therefore, how to control the width of the plate edge is a technical problem that needs to be solved urgently. Summary of the invention

[0004] The technical problem to be solved by the present invention is: to overcome the shortcomings of the prior art and provide a method for controlling the edge width of an electronic glass plate, by observing and judging the current edge width of the plate through a camera, and when the edge width of the plate needs to be adjusted, the adjustment strategy provided by the present invention is used to automatically adjust various parameters to achieve accurate and controllable adjustment of the edge width of the plate, thereby achieving the purpose of improving process stability and yield rate.

[0005] The technical solution of the present invention is:

[0006] A method for controlling the edge width of an electronic glass plate, wherein cameras are respectively arranged on the left and right sides of the expansion section, the flattening section and the polishing section at the top of the tin bath, and electric heating mechanisms are respectively arranged on the left, middle and right positions of the expansion section, the flattening section and the polishing section at the top of the tin bath;

[0007] There are 1# and 2# edge drawing machines on the left and right sides of the tin bath expansion section, 3#, 4# and 5# edge drawing machines on the left and right sides of the flattening section, and 6# and 7# edge drawing machines on the left and right sides of the polishing section.

[0008] (1) When the board edge width needs to be changed from W 1 Increase to W 2The adjustment method is as follows:

[0009] 1) First phase adjustment

[0010] Increase the feed rate, increase the temperature on both sides of the expansion section, flattening section and polishing section, increase the speed of 2#-7# edge drawing machine, increase the angle of 1#-4# edge drawing machine, and operate according to the above adjustments. The width of the plate edge gradually increases until the camera monitors that the width of the plate edge is stable to W. 3 =W 1 +(W 2 -W 1 ) / 2;

[0011] 2) Second stage adjustment

[0012] Continue to increase the temperature on both sides of the expansion section, flattening section and polishing section, increase the angle of 1#-4# edge drawing machine, reduce the depth of 2#-7# edge drawing machine, continue to operate according to the above adjustments, and gradually increase the plate edge width until the camera monitors that the plate edge width is stable to W 4 , then continue to adjust as follows:

[0013] a) If W 4 =W 2 , then reduce the depth of 2#-7# edge drawing machine, and the adjustment is completed;

[0014] b) If W 4 <W 2 , then increase the angle of 1#-4# edge drawing machine and continue to run until the set target W is reached 2 , execute step a);

[0015] c) If W 4 >W 2 , then reduce the angle of 1#-4# edge drawing machine until the plate edge width reaches the set target W 2 , then perform step a);

[0016] (2) When the board edge width needs to be changed from W 1 Reduce to W 5 The adjustment method is as follows:

[0017] 1) First phase adjustment

[0018] Reduce the amount of material, lower the temperature on both sides of the expansion section, flattening section and polishing section, increase the depth of the 2#-7# edge drawing machine, reduce the speed of the 2#-7# edge drawing machine, reduce the angle of the 1#-4# edge drawing machine, and operate according to the above adjustments. The width of the plate edge is gradually reduced until the camera monitors that the width of the plate edge is stable to W 6 =W 1 -(W 1 -W 5 ) / 2;

[0019] 2) Second stage adjustment

[0020] Continue to reduce the temperature on both sides of the expansion section, flattening section and polishing section, reduce the angle of 1#-4# edge drawing machine, increase the depth of 2#-7# edge drawing machine, continue to operate according to the above adjustments, and the plate edge width gradually decreases until the camera monitors that the plate edge width is stable to W 7 , then continue to adjust as follows;

[0021] a) If W 7 =W 5 , the adjustment is completed;

[0022] b) If W 7 <W 5 , then increase the angle of 2#-4# edge drawing machine and continue to run until the set target W is reached 5 ;

[0023] c) If W 7 >W 5 , then reduce the angle of 2#-4# edge drawing machine; until the plate edge width reaches the set target W 5 .

[0024] Preferably, in step (1), the feed amount is M 1 Improve X 1 To M 2 , X 1 =L 1 ×(W 2 -W 1 )×h 1 , where L 1 is the pulling amount, h 1 is the thickness of the glass plate; the temperature on the left and right sides of the expansion section is increased to T 11 =T 1 +X 2 ×T 1 , the temperature on both sides of the flattening section is increased to T 21 =T 2 +2X 2 ×T 2 , the temperature on both sides of the polishing section is increased to T 31 =T 3 +X 2 ×T 3 , X 2 =(W 2 -W 1 ) / 4W 1 , T 1 -T 3 are the initial temperatures on the left and right sides of the expansion section, flattening section, and polishing section respectively; the speed of the 2# edge drawing machine is increased to V21 =V 2 +X 2 ×V 2 , the speed of 3# edge drawing machine is increased to V 31 =V 3 +3X 2 ×V 3 , the speed of 4# edge drawing machine is increased to V 41 =V 4 +3X 2 ×V 4 , the speed of 5# edge drawing machine is increased to V 51 =V 5 +3X 2 ×V 5 , the speed of 6# edge drawing machine is increased to V 61 =V 6 +2X 2 ×V 6 , the speed of 7# edge drawing machine is increased to V 71 =V 7 +X 2 ×V 7 , V 2 -V 7 are the initial speeds of 2#-7# edge drawing machines respectively; the angle of 1# edge drawing machine increases to θ 11 =θ 1 +X 2 ×θ 1 , the angle of 2# edge drawing machine increases to θ 21 =θ 2 +2X 2 ×θ 2 , the angle of 3# edge drawing machine is increased to θ 31 =θ 3 +2X 2 ×θ 3 , the angle of 4# edge drawing machine is increased to θ 41 =θ 4 +X 2 ×θ 4 ,θ 1 -θ 4 They are the initial angles of 1#-4# edge drawing machines respectively.

[0025] Preferably, in step (1) and step 2), the temperature on both sides of the expansion section is increased to T 12 =T 11 +X 3 ×T 11 , the temperature on both sides of the flattening section is increased to T 22 =T 21 +X 3 ×T 21 , the temperature on both sides of the polishing section is increased to T32 =T 31 +X 3 ×T 31 , X 3 =(W 2 -W 3 ) / 4W 3 ; The angle of 1# edge drawing machine increases to θ 12 =θ 11 +X 3 ×θ 11 , the angle of 2# edge drawing machine increases to θ 22 =θ 21 +2X 3 ×θ 21 , the angle of 3# edge drawing machine is increased to θ 32 =θ 31 +2X 3 ×θ 31 , the angle of 4# edge drawing machine is increased to θ 42 =θ 41 +X 3 ×θ 41 ; The depth of 2# edge drawing machine is reduced by 0.7(W 3 -W 1 ), the depth of 3# edge drawing machine is reduced by 0.85(W 3 -W 1 ), the depth of 4-7# edge drawing machines is reduced (W 3 -W 1 ).

[0026] Preferably, in step a) of step (1), if W 4 =W 2 , then the depth of the 2# edge drawing machine is further reduced by 0.7 (W 4 -W 3 ), the depth of 3# edge drawing machine is further reduced by 0.85(W 4 -W 3 ), the depth of 4-7# edge drawing machines is further reduced (W 4 -W 3 ), the adjustment is completed.

[0027] Preferably, in step b) of step (1), if W 4 <W 2 , then the angle of 2# edge drawing machine increases to θ 23 =θ 22 +X 4 ×θ 22 , the angle of 3# edge drawing machine is increased to θ 33 =θ 32 +X 4 ×θ 32 , the angle of 4# edge drawing machine is increased to θ 43=θ 42 +0.5X 4 ×θ 42 , X 4 =(W 2 -W 4 ) / 4W 4 ; Continue running until the set target W is reached 2 , execute step a).

[0028] Preferably, in step c) of step (1), if W 4 >W 2 , then the angle of 2# edge drawing machine is reduced to θ 24 =θ 22 -X 5 ×θ 22 , the angle of 3# edge drawing machine is reduced to θ 34 =θ 32 -X 5 ×θ 32 , the angle of 4# edge drawing machine is reduced to θ 44 =θ 42 -0.5X 5 ×θ 42 , X 5 =(W 4 -W 2 ) / 4W 4 ; Until the board edge width reaches the set target W 2 , then perform step a).

[0029] Preferably, in step (2) in step 1), the feed amount is M 1 Reduce X 6 To M 3 , X 6 =L 1 ×(W 1 -W 5 )×h 1 , where L 1 is the pulling amount, h 1 is the thickness of the glass plate; the temperature on the left and right sides of the expansion section is reduced to T 11 =T 1 -X 7 ×T 1 , the temperature on both sides of the flattening section is reduced to T 21 =T 2 -2X 7 ×T 2 , the temperature on both sides of the polishing section is reduced to T 31 =T 3 -X 7 ×T 3 , X 7 =(W 1 -W5 ) / 4W 1 , T 1 -T 3 The initial temperatures of the left and right sides of the expansion section, flattening section and polishing section are respectively; the depth of the 2# edge drawing machine increases by 0.7 (W 1 -W 5 ), the depth of 3# edge drawing machine increased by 0.85(W 1 -W 5 ), the depth of 4-7# edge drawing machines increased (W 1 -W 5 ); The speed of 2# edge drawing machine is reduced to V 21 =V 2 -X 7 ×V 2 , the speed of 3# edge drawing machine is reduced to V 21 =V 3 -3X 7 ×V 3 , the speed of 4# edge drawing machine is reduced to V 21 =V 4 -3X 7 ×V 4 , the speed of 5# edge drawing machine is reduced to V 21 =V 5 -3X 7 ×V 5 , the speed of 6# edge drawing machine is reduced to V 21 =V 6 -2X 7 ×V 6 , the speed of 7# edge drawing machine is reduced to V 21 =V 7 -X 7 ×V 7 , V 2 -V 7 are the initial speeds of the 2#-7# edge drawing machines respectively; the angle of the 1# edge drawing machine is reduced to θ 11 =θ 1 -X 7 ×θ 1 , the angle of 2# edge drawing machine is reduced to θ 21 =θ 2 -2X 7 ×θ 2 , the angle of 3# edge drawing machine is reduced to θ 31 =θ 3 -2X 7 ×θ 3 , the angle of 4# edge drawing machine is reduced to θ 41 =θ 4 -X 7 ×θ 4 ,θ 1 -θ4 They are the initial angles of 1#-4# edge drawing machines respectively.

[0030] Preferably, in step (2), the temperature on both sides of the expansion section is reduced to T 12 =T 11 -X 8 ×T 11 , the temperature on both sides of the flattening section is reduced to T 22 =T 21 -X 8 ×T 21 , the temperature on both sides of the polishing section is reduced to T 32 =T 31 -X 8 ×T 31 , X 8 =(W 6 -W 5 ) / 4W 6 ; The angle of 1# edge drawing machine is reduced to θ 12 =θ 11 -X 8 ×θ 11 , the angle of 2# edge drawing machine is reduced to θ 22 =θ 21 -2X 8 ×θ 21 , the angle of 3# edge drawing machine is reduced to θ 32 =θ 31 -2X 8 ×θ 31 , the angle of 4# edge drawing machine is reduced to θ 42 =θ 41 -X 8 ×θ 41 ; The depth of 2# edge drawing machine increases by 0.2(W 6 -W 5 ), the depth of 3# edge drawing machine increased by 0.3(W 6 -W 5 ), the depth of 4-7# edge drawing machines increased by 0.5 (W 6 -W 5 ).

[0031] Preferably, in step b) of step (2), if W 7 <W 5 , then the angle of 2# edge drawing machine increases to θ 23 =θ 22 +X 9 ×θ 22 , the angle of 3# edge drawing machine is increased to θ 33 =θ 32 +X 9 ×θ 32, the angle of 4# edge drawing machine is increased to θ 43 =θ 42 +0.5X 9 ×θ 42 , X 9 =(W 5 -W 7 ) / 4W 7 , continue to run until the set target W is reached 5 .

[0032] Preferably, in step c) of step (2), if W 7 >W 5 , then the angle of 2# edge drawing machine is reduced to θ 24 =θ 22 -X 10 ×θ 22 , the angle of 3# edge drawing machine is reduced to θ 34 =θ 32 -X 10 ×θ 32 , the angle of 4# edge drawing machine is reduced to θ 44 =θ 42 -0.5X 10 ×θ 42 , X 10 =(W 7 -W 5 ) / 4W 7 ; Until the board edge width reaches the set target W 5 .

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The present invention determines the current board edge width through camera observation. When the board edge width needs to be adjusted, the adjustment strategy provided by the present invention is used to automatically adjust various parameters to achieve accurate and controllable adjustment of the board edge width, thereby achieving the purpose of improving process stability and yield rate and reducing the amount of waste. DETAILED DESCRIPTION

[0035] In order to enable persons skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention.

[0036] In the present invention, the tin bath is divided into five areas from front to back, namely the inlet section, expansion section, flattening section, polishing section and forming section. The inlet section mainly relies on the glass liquid's own gravity to move, and no control is required; in the forming section, the glass liquid has been cooled into a glass plate, and the plate edge width has been finalized, and only needs to be pulled without adjustment; therefore, the present invention mainly involves the control of the expansion section, flattening section and polishing section.

[0037] Furthermore, the present invention divides the tin bath into a middle part, a left part and a right part transversely. The glass needs to be located on the center line during production, so the left and right sides are symmetrically arranged, and the equipment configuration and parameter adjustment are also consistent.

[0038] Two edge drawing machines (1# and 2# edge drawing machines) are set on the left and right sides of the tin bath expansion section, three edge drawing machines (3#, 4# and 5# edge drawing machines) are set on the left and right sides of the flattening section, and two edge drawing machines (6# and 7# edge drawing machines) are set on the left and right sides of the polishing section, totaling 14 edge drawing machines.

[0039] There are several cameras on the top of the tin bath to monitor the edge position of the glass. Specifically, there is one camera on each of the left and right edges of the expansion section, flattening section, and polishing section, for a total of six cameras. There is also an electric heating mechanism (such as silicon carbon rods) on the top of the tin bath. The left and right edges of the expansion section are controlled by one group (60 silicon carbon rods), the left and right edges of the flattening section are controlled by one group (100 silicon carbon rods), the left and right edges of the polishing section are controlled by one group (80 silicon carbon rods), and the central electric heating is controlled by one group (240 silicon carbon rods).

[0040] Example 1

[0041] When the glass with a width of 2700 mm is normally produced, its initial parameters are: glass plate thickness h 1 =0.6mm, feeding amount M 1 =1.13t / h, pulling capacity L 1 =278m / h, the temperature of the left and right sides of the expansion section is T 1 =1053℃, temperature of left and right sides of flattening section T 2 =980℃, the temperature of the left and right sides of the polishing section is T 3 =810℃, the speeds of 1-7# edge drawing machines are V 1＝ 35m / h, V 2＝ 68m / h, V 3＝ 102m / h, V 4＝ 141m / h, V 5＝ 184m / h, V 6＝ 208m / h, V 7 =226m / h, angles are θ 1 =3°,θ 2 =8°,θ 3 =11°,θ 4 =13.5°,θ 5 =11°,θ 6 =6°,θ 7 =2°, the depth of entering the tin bath is H 1 =1200mm, H 2 =1400mm, H 3 =1500mm, H 4=1580mm, H 5 =1580mm, H 6 =1580mm, H 7 =1580mm.

[0042] Among them, the pulling amount L 1 It is the production reference parameter. Except for manual adjustment, it remains unchanged by default. When the glass plate width parameter remains unchanged, the plate edge width needs to be changed from W 1 =200mm increase to W 2 =260mm, the method to control the edge width of the electronic glass plate is as follows:

[0043] 1) First phase adjustment

[0044] The feed amount is M 1 =1.13t / h increase X 1 To M 2 =1.141t / h, X 1 =L 1 ×(W 2 -W 1 )×h 1 =0.011t / h;

[0045] The temperature on the left and right sides of the expansion section increases by X 2 ×T 1 To T 11 =1132℃, the temperature on both sides of the flattening section increases by 2X 2 ×T 2 To T 21 =1127℃, the temperature on both sides of the polishing section increases by X 2 ×T 3 To T 31 =870.75℃,X 2 =(W 2 -W 1 ) / 4W 1 =0.075;

[0046] 2# edge drawing machine speed increased by X 2 ×V 2 To V 21 =73.1m / h, the speed of 3# edge drawing machine increased by 3X 2 ×V 3 To V 31 =124.95m / h, the speed of 4# edge drawing machine increased by 3X 2 ×V 4 To V 41 =172.73m / h, the speed of 5# edge drawing machine increased by 3X 2 ×V 5 To V 51=225.4m / h, the speed of 6# edge drawing machine increased by 2X 2 ×V 6 To V 61 =239.2m / h, the speed of 7# edge drawing machine increased by X 2 ×V 7 To V 71 =242.9m / h;

[0047] 1# Edge pulling machine angle increases by X 2 ×θ 1 to θ 11 =3.22°, the angle of 2# edge drawing machine increases by 2X 2 ×θ 2 to θ 21 =9.2°, the angle of 3# edge drawing machine increases by 2X 2 ×θ 3 to θ 31 =12.6°, the angle of 4# edge drawing machine increases by X 2 ×θ 4 to θ 41 =14.5°;

[0048] According to the above adjusted parameters, the board edge width gradually increases until the camera monitors that the board edge width is stable to W 3 =W 1 +(W 2 -W 1 ) / 2=230mm;

[0049] 2) Second stage adjustment

[0050] The temperature on the left and right sides of the expansion section increases by X 3 ×T 11 To T 12 =1168.9℃, the temperature on both sides of the flattening section increases by X 3 ×T 21 To T 22 =1163.75℃, the temperature on both sides of the polishing section increases by X 3 ×T 31 To T 32 =899.14℃,X 3 =(W 2 -W 3 ) / 4W 3 =0.0326;

[0051] 1# Edge pulling machine angle increases by X 3 ×θ 11 to θ 12 =3.33°, the angle of 2# edge drawing machine increases by 2X 3 ×θ 21 to θ22 =9.8°, the angle of 3# edge drawing machine increases by 2X 3 ×θ 31 to θ 32 =13.42°, the angle of 4# edge drawing machine increases by X 3 ×θ 41 to θ 42 =14.97°;

[0052] The depth of 2# edge drawing machine is reduced by 0.7(W 3 -W 1 ) to H 21 =1379mm, the depth of 3# edge drawing machine is reduced by 0.85(W 3 -W 1 ) to H 31 =1474.5mm, the depth of 4-7# edge drawing machines is reduced (W 3 -W 1 ) to H 41 -H 71 Both are 1550mm;

[0053] Continue to run according to the above adjusted parameters, and gradually increase the board edge width until the camera monitors that the board edge width is stable to W 4 =260mm, then the depth of the 2# edge drawing machine is further reduced by 0.7(W 4 -W 3 ) to H 21 =1358mm, the depth of 3# edge drawing machine is further reduced by 0.85(W 4 -W 3 ) to H 31 =1449mm, the depth of 4-7# edge drawing machines is further reduced (W 4 -W 3 ) to H 41 -H 71 =1520mm, adjustment completed.

[0054] Example 2

[0055] The same specification glass is produced as in Example 1, and the initial parameters are the same as in Example 1. Then, when the plate edge width is changed from W 1 =200mm reduced to W 5 =150mm, the method to control the edge width of the electronic glass plate is as follows:

[0056] 1) First phase adjustment

[0057] The feed amount is M 1 =1.13t / hReduce X 6 To M 3 =1.122t / h, X 6 =L1 ×(W 1 -W 5 )×h 1 =0.008t / h;

[0058] The temperature on the left and right sides of the expansion section decreases by X 7 ×T 1 To T 11 =987.2℃, the temperature on both sides of the flattening section is reduced by 2X 7 ×T 2 To T 21 =857.5℃, the temperature on both sides of the polishing section is reduced by X 7 ×T 3 To T 31 =759.38℃,X 7 =(W 1 -W 5 ) / 4W 1 =0.0625;

[0059] The depth of 2# edge drawing machine increases by 0.7(W 1 -W 5 ) to H 21 =1435mm, the depth of 3# edge drawing machine increases by 0.85(W 1 -W 5 ) to H 31 =1542.5mm, the depth of 4-7# edge drawing machines increased (W 1 -W 5 ) to H 41 -H 71 =1630mm;

[0060] 2# edge drawing machine speed reduction X 7 ×V 2 To V 21 =63.75m / h, the speed of 3# edge drawing machine is reduced by 3X 7 ×V 3 To V 31 =82.88m / h, the speed of 4# edge drawing machine is reduced by 3X 7 ×V 4 To V 41 =114.56m / h, the speed of 5# edge drawing machine is reduced by 3X 7 ×V 5 To V 51 =149.5m / h, the speed of 6# edge drawing machine is reduced by 2X 7 ×V 6 To V 61 =182m / h, the speed of 7# edge drawing machine is reduced by X 7 ×V 7 To V 71=211.87m / h;

[0061] 1# Edge pulling machine angle reduction X 7 ×θ 1 to θ 11 =2.8°, the angle of 2# edge drawing machine is reduced by 2X 7 ×θ 2 to θ 21 =7°, the angle of 3# edge drawing machine is reduced by 2X 7 ×θ 3 to θ 31 =9.63°, the angle of 4# edge drawing machine is reduced by X 7 ×θ 4 to θ 41 =12.65°;

[0062] According to the above adjusted parameters, the board edge width gradually decreases until the camera monitors that the board edge width is stable to W 6 =W 1 -(W 1 -W 5 ) / 2=175mm;

[0063] 2) Second stage adjustment

[0064] The temperature on the left and right sides of the expansion section decreases by X 8 ×T 11 To T 12 =951.94℃, the temperature on both sides of the flattening section decreases by X 8 ×T 21 To T 22 =796.25℃, the temperature on both sides of the polishing section decreases by X 8 ×T 31 To T 32 =732.26℃,X 8 =(W 6 -W 5 ) / 4W 6 =0.036;

[0065] 1# Edge pulling machine angle reduction X 8 ×θ 11 to θ 12 =2.7°, the angle of 2# edge drawing machine is reduced by 2X 8 ×θ 21 to θ 22 =6.5°, the angle of 3# edge drawing machine is reduced by 2X 8 ×θ 31 to θ 32 =8.94°, the angle of 4# edge drawing machine is reduced by X 8 ×θ 41 to θ 42=12.2°;

[0066] The depth of 2# edge drawing machine increases by 0.2(W 6 -W 5 ) to H 21 =1440mm, the depth of 3# edge drawing machine increases by 0.3(W 6 -W 5 ) to H 31 =1550mm, the depth of 4-7# edge drawing machines increases by 0.5(W 6 -W 5 ) to H 41 -H 71 =1642.5mm;

[0067] Continue to run according to the above adjusted parameters, and the board edge width will gradually decrease until the camera monitors that the board edge width is stable to W 7 =150mm, adjustment completed.

Claims

1. A method for controlling the edge width of an electronic glass plate, characterized in that: Cameras are respectively arranged on the left and right sides of the expansion section, flattening section and polishing section at the top of the tin bath, and electric heating mechanisms are respectively arranged on the left, middle and right positions of the expansion section, flattening section and polishing section at the top of the tin bath; There are 1# and 2# edge drawing machines on the left and right sides of the tin bath expansion section, 3#, 4# and 5# edge drawing machines on the left and right sides of the flattening section, and 6# and 7# edge drawing machines on the left and right sides of the polishing section. (1) When the board edge width needs to be increased from W1 to W2, the adjustment method is as follows: 1) First phase adjustment Increase the feed amount, increase the temperature on both sides of the expansion section, flattening section and polishing section, increase the speed of the 2#-7# edge drawing machine, increase the angle of the 1#-4# edge drawing machine, and operate according to the above adjustments. The plate edge width gradually increases until the camera monitors that the plate edge width is stable to W3=W1+(W2-W1) / 2; 2) Second stage adjustment Continue to increase the temperature on both sides of the expansion section, flattening section and polishing section, increase the angle of 1#-4# edge drawing machine, reduce the depth of 2#-7# edge drawing machine, continue to operate according to the above adjustments, and gradually increase the plate edge width until the camera monitors that the plate edge width is stable to W4, then continue to adjust in the following way: a) If W4 = W2, reduce the depth of 2#-7# edge drawing machines and the adjustment is complete; b) If W4<W2, increase the angle of 1#-4# edge drawing machine, continue to operate until the set target W2 is reached, and execute step a); c) If W4>W2, reduce the angle of 1#-4# edge drawing machines until the plate edge width reaches the set target W2, and then execute step a); (2) When the board edge width needs to be reduced from W1 to W5, the adjustment method is as follows: 1) First phase adjustment Reduce the amount of material, lower the temperature on both sides of the expansion section, flattening section and polishing section, increase the depth of the 2#-7# edge drawing machine, reduce the speed of the 2#-7# edge drawing machine, reduce the angle of the 1#-4# edge drawing machine, and operate according to the above adjustments. The width of the plate edge gradually decreases until the camera monitors that the width of the plate edge is stable to W6=W1-(W1-W5) / 2; 2) Second stage adjustment Continue to lower the temperature on both sides of the expansion section, flattening section and polishing section, reduce the angle of 1#-4# edge drawing machine, increase the depth of 2#-7# edge drawing machine, continue to operate according to the above adjustments, and the plate edge width gradually decreases until the camera monitors that the plate edge width is stable to W7, then continue to adjust in the following way; a) If W7 = W5, the adjustment is complete; b) If W7<W5, increase the angle of 2#-4# edge drawing machine and continue to operate until the set target W5 is reached; c) If W7>W5, reduce the angle of 2#-4# edge drawing machine until the plate edge width reaches the set target W5.

2. The method for controlling the edge width of an electronic glass plate according to claim 1, characterized in that: In step (1), the feed amount is increased from M1 to M2 by X1, where X1 = L1 × (W2-W1) × h1, where L1 is the pulling amount and h1 is the thickness of the glass sheet; the temperature on both sides of the expansion section is increased to T 11 =T1+X2×T1, the temperature on both sides of the flattening section is increased to T 21 =T2+2X2×T2, the temperature on both sides of the polishing section is increased to T 31 =T3+X2×T3, X2=(W2-W1) / 4W1, T1-T3 are the initial temperatures on the left and right sides of the expansion section, flattening section and polishing section respectively; the speed of the 2# edge drawing machine is increased to V 21 =V2+X2×V2, the speed of 3# edge drawing machine is increased to V 31 =V3+3X2×V3, the speed of 4# edge drawing machine is increased to V 41 =V4+3X2×V4, the speed of 5# edge drawing machine is increased to V 51 =V5+3X2×V5, the speed of 6# edge drawing machine is increased to V 61 =V6+2X2×V6, the speed of 7# edge drawing machine is increased to V 71 =V7+X2×V7, V2-V7 are the initial speeds of 2#-7# edge drawing machines respectively; the angle of 1# edge drawing machine increases to θ 11 =θ1+X2×θ1, the angle of 2# edge drawing machine increases to θ 21 =θ2+2X2×θ2, the angle of 3# edge drawing machine increases to θ 31 =θ3+2X2×θ3, the angle of 4# edge drawing machine increases to θ 41 =θ4+X2×θ4, θ1-θ4 are the initial angles of 1#-4# edge drawing machines respectively.

3. The method for controlling the edge width of an electronic glass plate according to claim 2, characterized in that: In step (1) of step 2), the temperature on both sides of the expansion section is increased to T 12 =T 11 +X3×T 11 , the temperature on both sides of the flattening section is increased to T 22 =T 21 +X3×T 21 , the temperature on both sides of the polishing section is increased to T 32 =T 31 +X3×T 31 , X3=(W2-W3) / 4W3; the angle of 1# edge drawing machine increases to θ 12 =θ 11 +X3×θ 11 , the angle of 2# edge drawing machine increases to θ 22 =θ 21 +2X3×θ 21 , the angle of 3# edge drawing machine is increased to θ 32 =θ 31 +2X3×θ 31 , the angle of 4# edge drawing machine is increased to θ 42 =θ 41 +X3×θ 41 ; The depth of the 2# edge drawing machine is reduced by 0.7 (W3-W1), the depth of the 3# edge drawing machine is reduced by 0.85 (W3-W1), and the depths of the 4-7# edge drawing machines are all reduced by (W3-W1).

4. The method for controlling the edge width of an electronic glass plate according to claim 3, characterized in that: In step a) of step (1), if W4=W2, the depth of the 2# edge drawing machine is further reduced by 0.7 (W4-W3), the depth of the 3# edge drawing machine is further reduced by 0.85 (W4-W3), and the depths of the 4-7# edge drawing machines are all further reduced by (W4-W3), and the adjustment is completed.

5. The method for controlling the edge width of an electronic glass plate according to claim 3, characterized in that: In step b) of step (1), if W4 < W2, the angle of the 2# edge drawing machine is increased to θ 23 =θ 22 +X4×θ 22 , the angle of 3# edge drawing machine is increased to θ 33 =θ 32 +X4×θ 32 , the angle of 4# edge drawing machine is increased to θ 43 =θ 42 +0.5X4×θ 42 , X4 = (W2-W4) / 4W4; continue running until the set target W2 is reached, and execute step a).

6. The method for controlling the edge width of an electronic glass plate according to claim 3, characterized in that: In step c) of step (1), if W4>W2, the angle of the 2# edge drawing machine is reduced to θ 24 =θ 22 -X5×θ 22 , the angle of 3# edge drawing machine is reduced to θ 34 =θ 32 -X5×θ 32 , the angle of 4# edge drawing machine is reduced to θ 44 =θ 42 -0.5X5×θ 42 , X5 = (W4-W2) / 4W4; until the board edge width reaches the set target W2, then execute step a).

7. The method for controlling the edge width of an electronic glass plate according to claim 1, characterized in that: In step (2) of step 1), the feed amount is reduced from M1 to M3 by X6, where X6 = L1 × (W1-W5) × h1, where L1 is the pulling amount and h1 is the thickness of the glass sheet; the temperature on both sides of the expansion section is reduced to T 11 =T1-X7×T1, the temperature on both sides of the flattening section is reduced to T 21 =T2-2X7×T2, the temperature on both sides of the polishing section is reduced to T 31 =T3-X7×T3, X7=(W1-W5) / 4W1, T1-T3 are the initial temperatures of the left and right sides of the expansion section, flattening section and polishing section respectively; the depth of the 2# edge drawing machine increases by 0.7(W1-W5), the depth of the 3# edge drawing machine increases by 0.85(W1-W5), and the depths of the 4-7# edge drawing machines all increase by (W1-W5); the speed of the 2# edge drawing machine decreases to V 21 =V2-X7×V2, the speed of 3# edge drawing machine is reduced to V 21 =V3-3X7×V3, the speed of 4# edge drawing machine is reduced to V 21 =V4-3X7×V4, the speed of 5# edge drawing machine is reduced to V 21 =V5-3X7×V5, the speed of 6# edge drawing machine is reduced to V 21 =V6-2X7×V6, the speed of 7# edge drawing machine is reduced to V 21 =V7-X7×V7, V2-V7 are the initial speeds of 2#-7# edge drawing machines respectively; the angle of 1# edge drawing machine is reduced to θ 11 =θ1-X7×θ1, the angle of 2# edge drawing machine is reduced to θ 21 =θ2-2X7×θ2, the angle of 3# edge drawing machine is reduced to θ 31 =θ3-2X7×θ3, the angle of 4# edge drawing machine is reduced to θ 41 =θ4-X7×θ4, θ1-θ4 are the initial angles of 1#-4# edge drawing machines respectively.

8. The method for controlling the edge width of an electronic glass plate according to claim 7, characterized in that: In step (2), the temperature on both sides of the expansion section is reduced to T 12 =T 11 -X8×T 11 , the temperature on both sides of the flattening section is reduced to T 22 =T 21 -X8×T 21 , the temperature on both sides of the polishing section is reduced to T 32 =T 31 -X8×T 31 , X8 = (W6-W5) / 4W6; the angle of 1# edge drawing machine is reduced to θ 12 =θ 11 -X8×θ 11 , the angle of 2# edge drawing machine is reduced to θ 22 =θ 21 -2X8×θ 21 , the angle of 3# edge drawing machine is reduced to θ 32 =θ 31 -2X8×θ 31 , the angle of 4# edge drawing machine is reduced to θ 42 =θ 41 -X8×θ 41 ; The depth of the 2# edge drawing machine increased by 0.2 (W6-W5), the depth of the 3# edge drawing machine increased by 0.3 (W6-W5), and the depth of the 4-7# edge drawing machines increased by 0.5 (W6-W5).

9. The method for controlling the edge width of an electronic glass plate according to claim 8, characterized in that: In step b) of step (2), if W7<W5, the angle of the 2# edge drawing machine is increased to θ 23 =θ 22 +X9×θ 22 , the angle of 3# edge drawing machine is increased to θ 33 =θ 32 +X9×θ 32 , the angle of 4# edge drawing machine is increased to θ 43 =θ 42 +0.5X9×θ 42 , X9=(W5-W7) / 4W7, continue running until the set target W5 is reached.

10. The method for controlling the edge width of an electronic glass plate according to claim 1, characterized in that: In step c) of step (2), if W7>W5, the angle of the 2# edge drawing machine is reduced to θ 24 =θ 22 -X 10 ×θ 22 , the angle of 3# edge drawing machine is reduced to θ 34 =θ 32 -X 10 ×θ 32 , the angle of 4# edge drawing machine is reduced to θ 44 =θ 42 -0.5X 10 ×θ 42 , X 10 =(W7-W5) / 4W7; until the board edge width reaches the set target W5.