Glass deep processing toughening furnace inlet row pitch control method and system

Abstract

The invention discloses a glass deep processing toughening furnace inlet row pitch control method and system, and the method comprises the steps: refreshing a sheet transmission tracking position to be zero when detecting that the front end of a previous sheet of glass reaches the tail end of a row pitch roller way according to a position signal sent by a detection element; according to the speed information sent by the driving element, the sheet conveying position of the previous sheet of glass is tracked, the first distance between the front end of the previous sheet of glass and the tail end of the row pitch roller way is calculated in real time, and when the first distance is larger than the first safe operation distance, the driving element is controlled to operate at the line connection operation speed to receive the next sheet of glass; when the driving element is controlled to be converted from the connecting line running speed to the toughening furnace running speed, the distance between the front end of the next piece of glass and the tail end of the previous piece of glass is made to be a preset fixed row pitch distance; according to the invention, the spacing of each piece of glass entering the toughening furnace can be controlled to be a fixed row spacing, so that the glass toughening effect is ensured, and the feeding quantity and toughening quality of the toughening furnace in unit time are improved.

Description

Technical Field

[0001] The invention relates to the technical field of glass deep processing production, and in particular to a method and system for controlling the inlet spacing of a glass deep processing tempering furnace. Background Art

[0002] With the rapid development of the photovoltaic industry, the photovoltaic glass deep processing production line has higher and higher requirements for production capacity and automation. The traditional method of adjusting the spacing of the glass at the entrance of the tempering furnace is to accelerate the glass and then decelerate it to synchronize with the tempering furnace speed. The deceleration time is adjusted through the human-machine interface to adjust the spacing of the glass entering the furnace. Once one of the four values ​​of the tempering furnace entry speed, glass length, connection speed and spacing setting time changes, the spacing will also change at the same time. The spacing of the glass inside the tempering furnace must be constant to ensure stable and uniform heating. A large spacing between the glass will affect the temperature and thus the tempering effect of heating. In addition, the mismatch of parameter settings may also cause stacking and collision failures. Therefore, the existing spacing method is not only cumbersome to operate, but also has large errors in spacing inaccuracy, and also increases the connection failure rate and reduces the loading capacity of the tempering furnace.

[0003] In the related art, the patent application document with publication number CN118004757A proposes to automatically adjust the spacing between glasses according to the number of glasses in the tempering furnace, idle time, glass storage machine and other detection means, so as to reduce manual intervention in the production line and reduce the risk of glass collision and overlap. However, this scheme adjusts the spacing of the glasses entering the tempering furnace according to the number of glasses in the tempering furnace. This spacing varies between 100mm and 400mm, and the spacing between each glass may be different. The purpose is to adjust the production capacity by controlling the spacing between the glasses. Summary of the invention

[0004] The technical problem to be solved by the present invention is how to keep the spacing between glass rows stable and improve the output and the heating effect of the tempering furnace.

[0005] The present invention solves the above technical problems by the following technical means:

[0006] On the one hand, the present invention proposes a method for controlling the row spacing at the entrance of a glass deep processing tempering furnace. A row spacing roller is installed at the entrance of the tempering furnace, and a detection element is installed along the row spacing roller. The output end of the detection element is connected to a controller, and the output end of the controller is connected to a driving element so that the driving element drives the row spacing roller to move. The method is applied to the controller, and includes:

[0007] When the front end of the last glass sheet is detected to reach the end of the row roller according to the position signal sent by the detection element, the glass tracking position is refreshed to zero;

[0008] According to the speed information sent by the driving element, the transmission position of the previous glass is tracked, the first distance between the front end of the previous glass and the end of the row roller is calculated in real time, and when the first distance is greater than the first safe operation distance, the driving element is controlled to operate at the line operation speed to receive the next glass;

[0009] When the driving element is controlled to switch from the line running speed to the tempering furnace running speed, the distance between the front end of the next glass sheet and the end of the previous glass sheet is a preset fixed row distance.

[0010] Furthermore, when the driving element is controlled to switch from the line running speed to the tempering furnace running speed, the distance between the front end of the next glass and the end of the previous glass is a preset fixed row distance, including:

[0011] According to the speed information sent by the driving element, the splicing position of the next glass is tracked, and the second distance between the front end of the next glass and the initial splicing position is calculated in real time;

[0012] When the second distance is equal to the second safe operating distance, the driving element is controlled to drive the spacing roller to decelerate from the connecting line running speed to the tempering furnace running speed through the set deceleration time, so that at this time the distance between the front end of the next piece of glass and the end of the previous piece of glass is a preset fixed spacing distance.

[0013] Furthermore, when tracking the splice position of the next glass piece according to the speed information sent by the driving element, the method further includes:

[0014] The splicing position of the next glass piece is updated according to the position signal sent by the detection element.

[0015] Further, the detection element includes a photoelectric switch B1 arranged at the initial splicing position, and a photoelectric switch B2, a photoelectric switch B3 and a photoelectric switch B4 arranged at a second correction distance position, a third correction distance position and a fourth correction distance position behind the row spacing roller entrance, the initial splicing position is located at the first correction distance in front of the row spacing roller entrance, and the splicing position of the next glass piece is corrected according to the position signal emitted by the detection element, including:

[0016] When the front end of the glass passes the photoelectric switch B1, the splice position of the refreshed glass is at the first correction distance in front of the row spacing roller entrance;

[0017] When the front end of the glass passes the photoelectric switch B2, the splice position of the refreshed glass is at the second corrected distance position behind the row spacing roller entrance;

[0018] When the front end of the glass passes the photoelectric switch B3, the splice position of the refreshed glass is the third corrected distance position behind the row spacing roller entrance;

[0019] When the front end of the glass passes through the photoelectric switch B4, the transmission position of the glass is refreshed to zero.

[0020] Further, the driving element includes a motor M1, a motor M2 and a motor M3 arranged in sequence according to the glass flow direction; when the driving element is controlled to switch from the line running speed to the tempering furnace running speed, the distance between the front end of the next glass and the end of the previous glass is a preset fixed row distance, including:

[0021] When the motor M1 is controlled to drive the corresponding roller group to run at the line running speed V1 to receive the next piece of glass, the next piece of glass is fed at the initial speed V0;

[0022] When the second distance between the front end of the next piece of glass and the initial splicing position is calculated to be equal to the second safe operating distance, the motor M1 and the motor M2 are controlled to drive the corresponding roller groups to decelerate from the connecting line running speed V1 to the tempering furnace running speed V2 after the set deceleration time, the front end of the next piece of glass reaches the photoelectric switch B3, and the distance between the front end of the next piece of glass and the end of the previous piece of glass is a preset fixed row distance.

[0023] Furthermore, when the front end of the next piece of glass reaches the photoelectric switch B3, the method further includes:

[0024] The motor M1 , the motor M2 , and the motor M3 are controlled to drive the corresponding roller groups to operate at the operating speed V2 of the tempering furnace.

[0025] Furthermore, if the initial speed V0>0, the method further includes:

[0026] Calculating a compensation distance based on the fixed row spacing distance;

[0027] Based on the compensation distance, the driving element is controlled to drive the row roller conveyor to decelerate.

[0028] Furthermore, the calculation formula of the first safe operating distance is:

[0029] S7=L-(V2×T4)-(S 13 -S8)

[0030] Where S7 is the first safe operating distance, L is the length of the glass, V2 is the operating speed of the tempering furnace, T4 is the total operating time of the next piece of glass from the initial splicing position to the photoelectric switch B3, T4 = T1 + T2 + T3, T2 = (S9 + S 11)-S1-S3, T1 is the acceleration time from the initial speed V0 to the connecting line running speed V1, T3 is the deceleration time from the connecting line running speed V1 to the tempering furnace running speed V2, S1 is the running distance corresponding to the acceleration time T1, S3 is the running distance corresponding to the deceleration time T3, S9 is the distance between the photoelectric switch B1 and the row spacing roller entrance, S 11 S is the distance between the photoelectric switch B2 and the entrance of the row spacing roller; 13 is the distance from the photoelectric switch B3 to the end of the row spacing roller, and S8 is the preset fixed row spacing distance.

[0031] Furthermore, the second safe running distance is S1+S2, wherein S1 is the running distance during the acceleration time T1 from the initial speed V0 to the connecting running speed V1, and S2 is the distance of uniform running at the connecting running speed V1:

[0032]

[0033] S2=S4-S1-S3

[0034] S4=S9+S 11

[0035] S3=V1×T3-T3×(V2-V1) / 2

[0036] Where S1 is the running distance corresponding to the acceleration time T1, S3 is the running distance corresponding to the deceleration time T3, S9 is the distance between the photoelectric switch B1 and the entrance of the row roller, S 11 is the distance between the photoelectric switch B2 and the row roller entrance, and V2 is the operating speed of the tempering furnace.

[0037] In addition, the present invention also proposes a row spacing control system for the entrance of a glass deep processing tempering furnace, the system comprising a controller, a detection element installed along the row spacing roller, the output end of the detection element is connected to the controller, the output end of the controller is connected to a driving element so that the driving element drives the row spacing roller to move, and the controller comprises:

[0038] A position calculation module, used for refreshing the sheet tracking position to zero when detecting that the front end of the previous sheet of glass reaches the end of the row spacing roller according to the position signal emitted by the detection element;

[0039] A position tracking module, for tracking the transmission position of the previous glass according to the speed information sent by the driving element, calculating in real time the first distance between the front end of the previous glass and the end of the row spacing roller, and controlling the driving element to operate at the connecting operation speed to receive the next glass when the first distance is greater than the first safe operation distance;

[0040] The operation driving module is used to control the driving element to switch from the connection operation speed to the tempering furnace operation speed so that the distance between the front end of the next glass and the end of the previous glass is a preset fixed row distance.

[0041] The advantages of the present invention are:

[0042] (1) The present invention tracks the position of the glass in real time and achieves a stable and continuous substrate spacing through a spacing system algorithm under the four changing variables of the tempering furnace entrance speed, the connecting line running speed, the glass length and the spacing. That is, the spacing of each piece of glass entering the tempering furnace is the set spacing value, and there is no fluctuation in the spacing. This spacing method can ensure the glass tempering effect and improve the number of pieces entering the tempering furnace per unit time and the tempering quality.

[0043] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 is a schematic diagram of the structure of a row spacing control system in one embodiment of the present invention;

[0045] Figure 2 This is a schematic diagram of the glass operation process in one embodiment of the present invention;

[0046] Figure 3 is a schematic diagram of a speed waveform during the operation of the next glass in one embodiment of the present invention;

[0047] Figure 4 is a schematic diagram of a speed waveform during the operation of the upper glass in one embodiment of the present invention;

[0048] Figure 5 It is a flow chart of a method for controlling the inlet spacing of a glass deep processing tempering furnace proposed in one embodiment of the present invention;

[0049] Figure 6 is a schematic diagram of a splice position tracking process in one embodiment of the present invention;

[0050] Figure 7 It is a schematic diagram of the position tracking of the film transmission in one embodiment of the present invention;

[0051] Figure 8 It is a schematic diagram of the algorithm flow of the inlet spacing of the glass deep processing tempering furnace in one embodiment of the present invention;

[0052] Fig. 9 It is a structural schematic diagram of an inlet row spacing control system of a glass deep processing tempering furnace proposed in one embodiment of the present invention. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] like Figure 1 As shown, in this embodiment, the glass processing production line is modified, and a three-drive row roller is installed at the entrance of the tempering furnace. The row roller is a glass transmission channel formed by multiple parallel and spaced rollers located between two vertical frames. The controller controls the driving element to drive the multiple parallel and spaced rollers to rotate to realize the transmission of the glass; the driving element includes a motor M1, a motor M2 and a motor M3 arranged in sequence according to the flow direction of the glass. It is assumed that the spacing between each roller is 200mm, the first roller is a free roller, the second to the eighth rollers are driven by the motor M1, the ninth to the thirteenth rollers are driven by the motor M2, the fourteenth to the sixteenth rollers are driven by the motor M3, and the seventeenth roller is also a free roller. The total length of the row roller is 3300mm.

[0055] Detection elements are installed along the row spacing roller, for example, the detection elements are installed on the stands on both sides, the detection elements include a photoelectric switch B1 arranged at the initial splicing position, and a photoelectric switch B2, a photoelectric switch B3 and a photoelectric switch B4 arranged at the second correction distance position, the third correction distance position and the fourth correction distance position behind the row spacing roller entrance, the initial splicing position is located at the first correction distance in front of the row spacing roller entrance; specifically, Figure 2 As shown: the photoelectric switch B1 is installed at S9 = 50 mm in front of the row spacing roller entrance, and the photoelectric switch B2 is installed at the back of the row spacing roller entrance, S 10 =1600mm, the photoelectric switch B3 is installed behind the row roller entrance S 11 =2600mm, the photoelectric switch B4 is installed behind the row roller entrance and at a distance of S from the row roller entrance 12 =3000mm.

[0056] Specifically, the present embodiment pre-sets the line running speed V1, the tempering furnace entrance speed V2, the row spacing S8, and the roller table inverter acceleration and deceleration time T1 and T3. The acceleration time T1 and the deceleration time T3 are the same. Figure 2The glass operation process shown defines that the spacing action is completed when the previous piece of glass G7 runs from the photoelectric switch B1 to the photoelectric switch B3, and at the same time the next piece of glass G6 runs from position A to position B, that is, the condition for allowing the spacing glass G7 to enter the spacing roller is that the spacing glass G6 runs to point A, so the safe operation distance of the glass is S7. This embodiment pre-calculates the safe operation distance S7 and writes it into the controller, so that when the controller tracks the transmission position of the previous piece of glass, it determines whether to allow the next piece of glass to enter based on the safe operation distance S7.

[0057] Depend on Figure 2 It can be seen that the length of the glass is defined as L, the running distance of the next piece of glass G7 during acceleration is S1, the running distance of the next piece of glass G7 at a constant speed is S2, the running distance of the next piece of glass G7 during deceleration is S3, the total running distance of the next piece of glass G7 from photoelectric switch B1 to photoelectric switch B3 is S4, the running distance of the previous piece of glass G6 from the start of the row spacing to the end of the row spacing is S5, the row spacing is S8, and the distance from the photoelectric switch B3 to the end of the row spacing roller is S 13 , spacing S6 = S 13 -S8, safe operating distance S7 = L-S5-S6.

[0058] The speed waveform of the next glass G7 during the operation from photoelectric switch B1 to photoelectric switch B3 is as follows: Figure 3 As shown, it starts with acceleration from speed V0=0 to V1, the running time is T1, the running distance is S1, then it runs at a constant speed of V1 for a period of T2, the running distance is S2, and then decelerates from speed V1 to V2, the running time is T3, the running distance is S3, the acceleration and deceleration setting time of the row spacing roller inverter is 0.5s, the acceleration and deceleration curve moves linearly, T1=T3=0.5s, so there is a logical relationship T4=T1+T2+T3.

[0059] have Figure 2 It can be seen that the total distance that the next piece of glass G7 runs from the photoelectric switch B1 to the photoelectric switch B3 is S4=S9+S11.

[0060] Acceleration process running distance

[0061] The running distance during deceleration process S3 = V1 × T3-T3 × (V2-V1) / 2,

[0062] Uniform speed running distance S2 = S4-S1-S3,

[0063] Uniform speed running time T2 = S2 / V1,

[0064] Therefore, the total running time T4 of the next piece of glass G7 from the operation of photoelectric switch B1 to the operation of photoelectric switch B3 can be calculated, T4=T1+T2+T3=0.5+S2 / V1+0.5.

[0065] Since the time T4 taken by the next glass G7 to move from the photoelectric switch B1 to the photoelectric switch B3 is the same as the time T5 taken by the previous glass G6 to move from position A to position B, T4 = T5. The speed waveform of the previous glass G6 during its movement from position A to position B is as follows: Figure 4 As shown, since T4 = T5, the running distance of the last glass G6 is S5 = V2 × T5 = V2 × T4;

[0066] The first safe running distance S7 = L-S5-S6 when the glass is spaced apart. Then the relationship between the first safe running distance and the set fixed spacing value is:

[0067] S7=L-(V2×T4)-(S 13 -S8)

[0068] Therefore, the controller controls the driving element to adjust the running speed of the spacing roller based on the first safe running distance, so as to stabilize the spacing between the glasses at a preset fixed value S8, thereby improving the number of sheets fed per unit time and the tempering quality of the tempering furnace.

[0069] It is understandable that if the total length of the row roller conveyor changes, the installation positions of the driving element and the detection element in this embodiment should also be adjusted accordingly so as to recalculate the first safe operating distance and the second safe operating distance that are suitable for the current row roller conveyor.

[0070] Therefore, based on the above principle, an embodiment of the present invention proposes a method for controlling the inlet spacing of a glass deep processing tempering furnace, such as Figure 5 As shown, the method is applied to a controller and comprises the following steps:

[0071] S10, when the front end of the previous glass sheet is detected to reach the end of the row roller according to the position signal emitted by the detection element, the sheet tracking position is refreshed to zero;

[0072] It should be noted that when the glass running position reaches the photoelectric switch B4, the photoelectric switch B4 is triggered to send a position signal. When the controller detects that the front end of the previous piece of glass reaches the end of the row roller according to the position signal sent by the photoelectric switch B4, the film tracking position is refreshed to zero.

[0073] S20, tracking the transmission position of the previous glass according to the speed information sent by the driving element, calculating in real time the first distance between the front end of the previous glass and the end of the row spacing roller, and controlling the driving element to operate at the connecting operation speed to receive the next glass when the first distance is greater than the first safe operation distance;

[0074] S30, controlling the driving element to switch from the line operation speed to the tempering furnace operation speed so that the distance between the front end of the next glass sheet and the end of the previous glass sheet is a preset fixed row distance.

[0075] It should be noted that the previous glass G6 starts to calculate the tracking position of the conveyor from the end C of the roller conveyor. When the distance S from the real-time calculated tracking position to the end C of the roller conveyor is T When it is greater than the calculated value S7, the next glass G7 is allowed to enter. At this time, the sheet tracking process is completed, and then the motor M1 runs at the speed V1 to connect the sheets. At the same time, the controller calculates the sheet tracking position and performs sheet tracking until the distance S T When the accumulated value is greater than the calculated value S7, the film tracking process is triggered again, and this cycle is repeated to achieve the purpose of continuous spacing.

[0076] As a further preferred technical solution, the step S30: controlling the driving element to switch from the line running speed to the tempering furnace running speed so that the distance between the front end of the next glass and the end of the previous glass is a preset fixed row distance, includes the following steps:

[0077] S31, tracking the splicing position of the next piece of glass according to the speed information sent by the driving element, and calculating in real time the second distance between the front end of the next piece of glass and the initial splicing position;

[0078] S32. When the second distance is equal to the second safe operating distance, control the driving element to drive the row spacing roller to decelerate from the connecting line running speed to the tempering furnace running speed through a set deceleration time, so that at this time, the distance between the front end of the next piece of glass and the end of the previous piece of glass is a preset fixed row spacing distance.

[0079] As a further preferred technical solution, the step S32: when the second distance is equal to the second safe operation distance, controlling the driving element to drive the row spacing roller to decelerate from the line operation speed to the tempering furnace operation speed through a set deceleration time, so that the distance between the front end of the next piece of glass and the end of the previous piece of glass is a preset fixed row spacing distance, specifically includes:

[0080] S321, controlling the motor M1 to drive the corresponding roller group to run at the line running speed V1 to receive the next piece of glass, and the next piece of glass is fed at the initial speed V0;

[0081] S322. When the second distance between the front end of the next piece of glass and the initial splicing position is calculated to be equal to the second safe operating distance, the motor M1 and the motor M2 are controlled to drive the corresponding roller groups to decelerate from the connecting line running speed V1 to the tempering furnace running speed V2 after the set deceleration time, the front end of the next piece of glass reaches the photoelectric switch B3, and the distance between the front end of the next piece of glass and the end of the previous piece of glass is a preset fixed row distance.

[0082] The second safe running distance is S1+S2, where S1 is the running distance during the acceleration time T1 from the initial speed V0 to the connecting running speed V1, and S2 is the distance of uniform running at the connecting running speed V1:

[0083]

[0084] S2=S4-S1-S3

[0085] S4=S9+S 11

[0086] S3=V1×T3-T3×(V2-V1) / 2

[0087] Where S1 is the running distance corresponding to the acceleration time (1, S3 is the running distance corresponding to the deceleration time T3, S9 is the distance between the photoelectric switch B1 and the row roller entrance, S 11 is the distance between the photoelectric switch B2 and the row roller entrance, and V2 is the operating speed of the tempering furnace.

[0088] It should be noted that if Figure 2 As shown, the second safe running distance is S1+S2, which is equal to S9+S 10 The distances are the same, and both can be used to calculate the second safe operating distance. However, in this embodiment, T4 can be obtained by calculating S1, S2, and S3, so in this embodiment, S1+S2 is preferably used as the second safe operating distance.

[0089] It should be noted that, as described above, the first safe running distance value is calculated under the assumption that the next piece of glass starts to accelerate from speed V0=0 to V1. However, in actual applications, the next piece of glass often has an initial speed V0>0 when it is spliced, which shortens the distance S8 and requires the roller to be controlled to decelerate in advance. Therefore, this embodiment proposes a feedback compensation mechanism to compensate for the deviation caused by the initial speed, which specifically includes:

[0090] Calculating a compensation distance based on the fixed row spacing distance;

[0091] Based on the compensation distance, the driving element is controlled to drive the row roller conveyor to decelerate.

[0092] Specifically, when the second piece of glass is allowed to enter, the instantaneous feeding speed is recorded, which is defined as V3 for easy understanding. Then the actual running distance in time T1 is S 实际 =(V1+V3)×T1 / 2, according to the actual running distance S 实际 , calculate the compensation distance as:

[0093] S 误差 =S 实际 -S1

[0094] Theoretically, the second glass starts to slow down at the S2 distance and runs S2-S after compensation. 误差 Start to slow down, thus achieving a compensation effect to keep the glass spacing stable at the set fixed row spacing.

[0095] It should be noted that, in this embodiment, the glass spacing algorithm achieves the function of closed-loop control through feedback compensation, thereby improving the stability of the spacing.

[0096] Furthermore, the PLC controller of this embodiment obtains the actual running speed of the frequency converter through Ethernet communication, converts it into the linear speed of the roller surface, and then accumulates the position tracking once each time the PLC controller executes a scanning cycle. However, due to machine errors in actual applications, the tracking position is deviated. Therefore, this embodiment also corrects the tracking position through the edge signal of the photoelectric switch to achieve the effect of synchronizing the tracking position with the actual running glass, that is, in the step S31: according to the speed information sent by the driving element, the splicing position of the next piece of glass is tracked, and the second distance between the front end of the next piece of glass and the initial splicing position is calculated in real time, it also includes:

[0097] The splicing position of the next glass is updated according to the position signal sent by the detection element, specifically:

[0098] When the front end of the glass passes the photoelectric switch B1, the splice position of the refreshed glass is at the first correction distance in front of the row spacing roller entrance;

[0099] When the front end of the glass passes the photoelectric switch B2, the splice position of the refreshed glass is at the second corrected distance position behind the row spacing roller entrance;

[0100] When the front end of the glass passes the photoelectric switch B3, the splice position of the refreshed glass is the third corrected distance position behind the row spacing roller entrance;

[0101] When the front end of the glass passes through the photoelectric switch B4, the transmission position of the glass is refreshed to zero.

[0102] It should be noted that when the front end of the glass passes through the photoelectric switch B4, the film tracking position is calculated, and the film position is refreshed to 0 when the film position has accumulated a total running distance of 3000 mm (roller length - B4 installation position).

[0103] Specifically, in this embodiment, the roller diameter is known to be D, the motor speed ratio is R, the PLC controller establishes Ethernet communication with the inverter, and collects the actual speed V of the inverters M1, M2, and M3 through communication messages. R1 (r / min), V R2 (r / min), V R3 (r / min);

[0104] PLC collects the speed V of the driver M1 R1 (r / min), converted to roller tracking linear speed V L1 (mm / s)=(V R1 / R)*D / 60;

[0105] PLC collects the speed V of the driver M1 R2 (r / min), converted to roller tracking linear speed V L2 (mm / s)=(V R2 / R)*D / 60;

[0106] PLC collects the speed V of the driver M3 R3 (r / min), converted to roller tracking linear speed V L3 (mm / s)=(V R3 / R)*D / 60;

[0107] Use the "RD_SINFO" instruction to obtain the startup information of the current PLC OB, and use the "RT_INFO" instruction to obtain the scan cycle T of the current OB1. C (um).

[0108] The position S of the PLC's last scan cycle tracking operation can be calculated C1 (mm)=V L1 / 1000000*T C；

[0109] The position S of the PLC's last scan cycle tracking operation can be calculated C2 (mm)=V L2 / 1000000*T C ;

[0110] The position S of the PLC's last scan cycle tracking operation can be calculated C3 (mm)=V L3 / 1000000*T C .

[0111] like Figure 6 As shown, the glass splice position tracking process is as follows: the program turns on the splice position tracking function;

[0112] The cumulative position of the splice tracking position in each PLC scanning cycle is S L :=S L +S C1 ;

[0113] There is an error between the calculation of the actual splice position and the actual glass position. To ensure the accuracy of the tracking position, the algorithm corrects the tracking position through a photoelectric switch;

[0114] When the front end of the glass passes the photoelectric switch B1, there are: S L :=50mm;

[0115] When the front end of the glass passes the photoelectric switch B2, there are: S L :=1600mm;

[0116] When the front end of the glass passes the photoelectric switch B3, there are: S L :=2600mm;

[0117] When S L； When the accumulation reaches the stop position of the row roller, the splicing logic is completed and the splicing accumulation position is initialized S L =0, the splicing process is completed and the receiving position tracking is closed.

[0118] Glass position tracking refers to tracking the actual position of the glass according to a certain motion algorithm. In actual applications, the actual spacing rollers perform both sheet splicing and sheet transmission during the spacing process, so it is necessary to track the sheet splicing position and sheet transmission position simultaneously. This embodiment cooperates with the spacing algorithm while splicing the sheets, triggers the transmission logic to start sheet transmission position tracking, such as Figure 7 As shown, the specific film splicing process is as follows: the program turns on the transmission position tracking function;

[0119] The accumulated position of the film tracking position in each PLC scanning cycle is S T :=S T +S C3 ;

[0120] There is an error between the calculation of the actual transmission position and the actual glass position. In order to ensure the accuracy of the tracking position, the algorithm corrects the tracking position through the photoelectric switch;

[0121] When the front end of the glass passes the photoelectric switch B4, there are: S T :=0mm;

[0122] When S TWhen the value is accumulated to a suitable value, the splicing logic is triggered and the receiving position tracking is turned on again. At this time, the receiving position tracking and the transmitting position tracking run independently.

[0123] Furthermore, if Figure 8 As shown, the specific implementation method is as follows: the row rollers M1, M2, and M3 start to receive substrates at a speed of V1, the glass position tracking algorithm collects the M1 running speed and calculates the receiving tracking position in real time, the photoelectric switch B1 is triggered and the receiving tracking position is refreshed to 50mm, the row rollers M1, M2, and M3 continue to run at a speed of V1 to receive substrates, the photoelectric switch B2 is triggered and the receiving tracking position is refreshed to 1600mm, the row rollers M1, M2, and M3 switch the receiving speed to V2 and continue to run, the photoelectric switch B3 is triggered and the receiving tracking position is refreshed to 2600mm, and the row rollers M1, M2, and M3 run at a speed of V2 until the substrate splicing is completed.

[0124] The row rollers M1, M2, and M3 start to transport the substrate at a speed of V2. The previous glass G6 starts to enter the tempering furnace. The transport tracking position is calculated from the end C of the rollers. At this time, the transport position is 0 mm. The glass position tracking algorithm collects the M3 transport speed and calculates the glass transport position in real time. When the tracking transport position is greater than the calculated value S7, the next glass G7 is allowed to enter. The row roller M1 runs at a speed of V1 to receive the substrate again. When the splicing tracking position is equal to S1+S2, the speeds of the row rollers M1 and M2 are decelerated from V1 to V2, and the splicing process is repeated. After the deceleration time T3, the next glass G7 reaches the photoelectric switch B3 position. The row rollers M1 and M2 are decelerated to V2. At this time, the spacing S8 between the previous glass G6 and the next glass G7 is the row distance. The row spacing is completed. The row glass G6 and the row glass G7 are transmitted into the tempering furnace at the same speed V2.

[0125] It should be noted that, since the traditional spacing method cannot achieve a constant and stable spacing when entering the tempering furnace, if the spacing is too small, it may collide with the glass, which greatly affects production. Therefore, the glass spacing in the traditional spacing method is generally controlled to fluctuate around 200mm, while this embodiment can set the glass spacing to be smaller, such as 100mm, and can control the glass spacing to be stable at a fixed value, which not only improves the tempering effect, but also increases the number of glasses entering the tempering furnace per unit time, thereby increasing production. The traditional 60m tempering furnace has a 12-hour shift output of about 9,500 pieces, while the method of this embodiment can achieve about 10,500, an increase of 1,000 pieces per shift, and the output is high quality.

[0126] In addition, if Fig. 9As shown, another embodiment of the present invention further proposes a row spacing control system for the entrance of a glass deep processing tempering furnace, the system comprising a controller, a detection element installed along the row spacing roller, the output end of the detection element is connected to the controller, the output end of the controller is connected to a driving element so that the driving element drives the row spacing roller to move, and the controller comprises:

[0127] A position calculation module 10 is used to detect that the front end of the previous glass reaches the end of the row spacing roller according to the position signal emitted by the detection element, and refresh the glass tracking position to zero;

[0128] The position tracking module 20 is used to track the transmission position of the previous glass according to the speed information sent by the driving element, calculate the first distance between the front end of the previous glass and the end of the row spacing roller in real time, and control the driving element to operate at the connecting operation speed to receive the next glass when the first distance is greater than the first safe operation distance;

[0129] The operation driving module 30 is used to control the driving element to switch from the line operation speed to the tempering furnace operation speed so that the distance between the front end of the next glass and the end of the previous glass is a preset fixed row distance.

[0130] As a further preferred technical solution, the detection element includes a photoelectric switch B1 arranged at the initial splicing position, and a photoelectric switch B2, a photoelectric switch B3 and a photoelectric switch B4 arranged at the second correction distance position, the third correction distance position and the fourth correction distance position behind the row spacing roller entrance, and the initial splicing position is located at the first correction distance in front of the row spacing roller entrance; the driving element includes a motor M1, a motor M2 and a motor M3 arranged in sequence according to the glass flow direction; specifically, Figure 2 shown.

[0131] As a further preferred technical solution, the operation driving module 30 includes:

[0132] A distance calculation unit, used for tracking the splicing position of the next glass piece according to the speed information sent by the driving element, and calculating in real time the second distance between the front end of the next glass piece and the initial splicing position;

[0133] The speed control unit is used to control the driving element to drive the row spacing roller to decelerate from the connecting line running speed to the tempering furnace running speed after a set deceleration time when the second distance is equal to the second safe running distance, so that the distance between the front end of the next piece of glass and the end of the previous piece of glass is a preset fixed row spacing distance.

[0134] As a further preferred technical solution, the controller further includes a refresh module for refreshing the splicing position of the next piece of glass according to the position signal emitted by the detection element.

[0135] As a further preferred technical solution, the refresh module is specifically used for:

[0136] When the front end of the glass passes the photoelectric switch B1, the splice position of the refreshed glass is at the first correction distance in front of the row spacing roller entrance;

[0137] When the front end of the glass passes the photoelectric switch B2, the splice position of the refreshed glass is at the second corrected distance position behind the row spacing roller entrance;

[0138] When the front end of the glass passes the photoelectric switch B3, the splice position of the refreshed glass is the third corrected distance position behind the row spacing roller entrance;

[0139] When the front end of the glass passes through the photoelectric switch B4, the position of the connecting piece of the refreshed glass is zero.

[0140] As a further preferred technical solution, the speed control unit is specifically used for:

[0141] When the motor M1 is controlled to drive the corresponding roller group to run at the line running speed V1 to receive the next piece of glass, the next piece of glass is fed at the initial speed V0;

[0142] When the second distance between the front end of the next glass and the initial splicing position is calculated to be equal to the second safe operating distance, the motor M1 and the motor M2 are controlled to drive the corresponding roller group to decelerate from the connecting line operating speed V1 to the tempering furnace operating speed V2 after the set deceleration time, the front end of the next glass reaches the photoelectric switch B3, and the distance between the front end of the next glass and the end of the previous glass is a preset fixed row distance;

[0143] The motor M1 , the motor M2 , and the motor M3 are controlled to drive the corresponding roller groups to operate at the operating speed V2 of the tempering furnace.

[0144] As a further preferred technical solution, the controller further includes a distance compensation module, which is specifically used for:

[0145] Calculating a compensation distance based on the fixed row spacing distance;

[0146] Based on the compensation distance, the driving element is controlled to drive the row roller conveyor to decelerate.

[0147] It should be noted that other embodiments or implementation methods of the inlet row spacing control system of the glass deep processing tempering furnace of the present invention can refer to the above-mentioned method embodiments, which will not be repeated here.

[0148] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0149] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0150] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A method for controlling the inlet spacing of a glass deep processing tempering furnace, characterized in that: A row spacing roller is installed at the entrance of the tempering furnace, a detection element is installed along the row spacing roller, the output end of the detection element is connected to a controller, and the output end of the controller is connected to a driving element so that the driving element drives the row spacing roller to move. The method is applied to the controller, and includes: When the front end of the last glass sheet is detected to reach the end of the row roller according to the position signal sent by the detection element, the glass tracking position is refreshed to zero; According to the speed information sent by the driving element, the transmission position of the previous glass is tracked, the first distance between the front end of the previous glass and the end of the row roller is calculated in real time, and when the first distance is greater than the first safe operation distance, the driving element is controlled to operate at the line operation speed to receive the next glass; When the driving element is controlled to switch from the line running speed to the tempering furnace running speed, the distance between the front end of the next glass sheet and the end of the previous glass sheet is a preset fixed row distance.

2. The method for controlling the inlet spacing of a glass deep processing tempering furnace according to claim 1, characterized in that: When the driving element is controlled to switch from the line running speed to the tempering furnace running speed, the distance between the front end of the next glass and the end of the previous glass is a preset fixed row distance, including: According to the speed information sent by the driving element, the splicing position of the next glass is tracked, and the second distance between the front end of the next glass and the initial splicing position is calculated in real time; When the second distance is equal to the second safe operating distance, the driving element is controlled to drive the spacing roller to decelerate from the connecting line running speed to the tempering furnace running speed through the set deceleration time, so that at this time the distance between the front end of the next piece of glass and the end of the previous piece of glass is a preset fixed spacing distance.

3. The method for controlling the inlet spacing of a glass deep processing tempering furnace according to claim 2, characterized in that: When tracking the splice position of the next glass piece according to the speed information sent by the driving element, the method further includes: The splicing position of the next glass piece is updated according to the position signal sent by the detection element.

4. The method for controlling the inlet spacing of a glass deep processing tempering furnace according to claim 3, characterized in that: The detection element includes a photoelectric switch B1 arranged at the initial splicing position, and a photoelectric switch B2, a photoelectric switch B3 and a photoelectric switch B4 arranged at the second correction distance position, the third correction distance position and the fourth correction distance position behind the row spacing roller entrance. The initial splicing position is located at the first correction distance in front of the row spacing roller entrance. The splicing position of the next glass is refreshed according to the position signal emitted by the detection element, including: When the front end of the glass passes the photoelectric switch B1, the splice position of the refreshed glass is at the first correction distance in front of the row spacing roller entrance; When the front end of the glass passes the photoelectric switch B2, the splice position of the refreshed glass is at the second corrected distance position behind the row spacing roller entrance; When the front end of the glass passes the photoelectric switch B3, the splice position of the refreshed glass is the third corrected distance position behind the row spacing roller entrance; When the front end of the glass passes through the photoelectric switch B4, the transmission position of the glass is refreshed to zero.

5. The method for controlling the inlet spacing of a glass deep processing tempering furnace according to claim 4, characterized in that: The driving element comprises a motor M1, a motor M2 and a motor M3 arranged in sequence according to the glass flow direction; when the driving element is controlled to switch from the line running speed to the tempering furnace running speed, the distance between the front end of the next glass and the end of the previous glass is a preset fixed row distance, including: When the motor M1 is controlled to drive the corresponding roller group to run at the line running speed V1 to receive the next piece of glass, the next piece of glass is fed at the initial speed V0; When the second distance between the front end of the next piece of glass and the initial splicing position is calculated to be equal to the second safe operating distance, the motor M1 and the motor M2 are controlled to drive the corresponding roller groups to decelerate from the connecting line running speed V1 to the tempering furnace running speed V2 after the set deceleration time, the front end of the next piece of glass reaches the photoelectric switch B3, and the distance between the front end of the next piece of glass and the end of the previous piece of glass is a preset fixed row distance.

6. The method for controlling the inlet spacing of a glass deep processing tempering furnace according to claim 5, characterized in that: When the front end of the next piece of glass reaches the photoelectric switch B3, the method further includes: The motor M1 , the motor M2 , and the motor M3 are controlled to drive the corresponding roller groups to operate at the operating speed V2 of the tempering furnace.

7. The method for controlling the inlet spacing of a glass deep processing tempering furnace according to claim 5, characterized in that: If the initial speed V0>0, the method further includes: Calculating a compensation distance based on the fixed row spacing distance; Based on the compensation distance, the driving element is controlled to drive the row roller conveyor to decelerate.

8. The method for controlling the inlet spacing of a glass deep processing tempering furnace according to claim 4, characterized in that: The calculation formula of the first safe operating distance is: S7=L-(V2×T4)-(S 13 -S8) Where S7 is the first safe operating distance, L is the length of the glass, V2 is the operating speed of the tempering furnace, T4 is the total operating time of the next piece of glass from the initial splicing position to the photoelectric switch B3, T4 = T1 + R2 + T3, T2 = (S9 + S 11 )-S1-S3, T1 is the acceleration time from the initial speed V0 to the connecting line running speed V1, T3 is the deceleration time from the connecting line running speed V1 to the tempering furnace running speed V2, S1 is the running distance corresponding to the acceleration time T1, S3 is the running distance corresponding to the deceleration time T3, S9 is the distance between the photoelectric switch B1 and the row spacing roller entrance, S 11 S is the distance between the photoelectric switch B2 and the entrance of the row spacing roller; 13 is the distance from the photoelectric switch B3 to the end of the row spacing roller, and S8 is the preset fixed row spacing distance.

9. The method for controlling the inlet spacing of a glass deep processing tempering furnace according to claim 4, characterized in that: The second safe running distance is S1+S2, where S1 is the running distance during the acceleration time T1 from the initial speed V0 to the connecting running speed V1, and S2 is the distance of uniform running at the connecting running speed V1: S2=S4-S1-S3 S4=S9+S 11 S3=V1×T3-T3×(V2-V1) / 2 Where S1 is the running distance corresponding to the acceleration time T1, S3 is the running distance corresponding to the deceleration time T3, S9 is the distance between the photoelectric switch B1 and the entrance of the row roller, S 11 is the distance between the photoelectric switch B2 and the row roller entrance, and V2 is the operating speed of the tempering furnace.

10. A control system for the inlet spacing of a glass deep processing tempering furnace, characterized in that: The system includes a controller and a detection element installed along the row spacing roller, wherein the output end of the detection element is connected to the controller, and the output end of the controller is connected to a driving element so that the driving element drives the row spacing roller to move, and the controller includes: A position calculation module, used for refreshing the sheet tracking position to zero when detecting that the front end of the previous sheet of glass reaches the end of the row spacing roller according to the position signal emitted by the detection element; A position tracking module, for tracking the transmission position of the previous glass according to the speed information sent by the driving element, calculating in real time the first distance between the front end of the previous glass and the end of the row spacing roller, and controlling the driving element to operate at the connecting operation speed to receive the next glass when the first distance is greater than the first safe operation distance; The operation driving module is used to control the driving element to switch from the connection operation speed to the tempering furnace operation speed so that the distance between the front end of the next glass and the end of the previous glass is a preset fixed row distance.

Images