WO2019029180A1 - 一种玻璃板钢化工艺过程中控制玻璃板出炉的方法 - Google Patents

一种玻璃板钢化工艺过程中控制玻璃板出炉的方法 Download PDF

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Publication number
WO2019029180A1
WO2019029180A1 PCT/CN2018/082667 CN2018082667W WO2019029180A1 WO 2019029180 A1 WO2019029180 A1 WO 2019029180A1 CN 2018082667 W CN2018082667 W CN 2018082667W WO 2019029180 A1 WO2019029180 A1 WO 2019029180A1
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Prior art keywords
heating
heating element
glass plate
furnace
glass sheet
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PCT/CN2018/082667
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English (en)
French (fr)
Inventor
赵雁
窦高峰
江春伟
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洛阳兰迪玻璃机器股份有限公司
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Application filed by 洛阳兰迪玻璃机器股份有限公司 filed Critical 洛阳兰迪玻璃机器股份有限公司
Priority to JP2020506244A priority Critical patent/JP6852222B2/ja
Priority to AU2018312663A priority patent/AU2018312663B2/en
Priority to ES18844566T priority patent/ES2954379T3/es
Priority to US16/636,903 priority patent/US11667556B2/en
Priority to CA3071471A priority patent/CA3071471C/en
Priority to EP18844566.2A priority patent/EP3657295B1/en
Priority to KR1020207006742A priority patent/KR102280818B1/ko
Priority to RU2020109890A priority patent/RU2737064C1/ru
Publication of WO2019029180A1 publication Critical patent/WO2019029180A1/zh

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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/30—Automatic controllers with an auxiliary heating device affecting the sensing element, e.g. for anticipating change of temperature
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B27/00—Tempering or quenching glass products
    • C03B27/012—Tempering or quenching glass products by heat treatment, e.g. for crystallisation; Heat treatment of glass products before tempering by cooling
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B27/00—Tempering or quenching glass products
    • C03B27/04—Tempering or quenching glass products using gas
    • C03B27/0417—Controlling or regulating for flat or bent glass sheets
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B29/00—Reheating glass products for softening or fusing their surfaces; Fire-polishing; Fusing of margins
    • C03B29/04—Reheating glass products for softening or fusing their surfaces; Fire-polishing; Fusing of margins in a continuous way
    • C03B29/06—Reheating glass products for softening or fusing their surfaces; Fire-polishing; Fusing of margins in a continuous way with horizontal displacement of the products
    • C03B29/08—Glass sheets
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
    • Y02P40/57—Improving the yield, e-g- reduction of reject rates

Definitions

  • the invention relates to a production process of a glass plate, in particular to a method for controlling the release of a glass plate during a glass plate tempering process.
  • the glass sheet In the tempering process of the glass sheet, the glass sheet is first heated to a softening temperature (for example, 600 ° C to 700 ° C), and then the tempering treatment is completed by rapid cooling.
  • a softening temperature for example, 600 ° C to 700 ° C
  • the heating of the glass plate is an important process control process.
  • the heating process of the glass plate is usually controlled by the heating time, that is, the glass plate is estimated by multiplying the thickness of the glass plate by the time coefficient. Heating time, when the set heating time is reached, the glass plate is released. This method of relying on experience to control the heating process of the glass plate has the following technical defects: 1.
  • the heating temperature of the glass plate is not easily controlled accurately, and the glass plate often has a phenomenon of insufficient heating temperature or over-burning, which directly disadvantages the tempering quality of the glass plate.
  • the influence, for example, the tempering stress is not up to standard and the flatness of the glass plate is unqualified; 2. If the heating time is too long, it will cause a certain energy waste and increase the production cost; 3. The transition depends on the experience and quality of the operator, which not only increases the labor cost. And it is not conducive to the improvement of product qualification rate and the long-term stability of quality.
  • a Chinese patent application discloses a method for heating a glass sheet during the tempering of a glass sheet, and proposes: a plurality of temperature sensors for detecting the temperature of the glass sheet in the heating section are arranged in the heating section of the glass sheet tempering furnace, when the glass sheet is in the heating process The temperature sensor detects that the temperature of the glass plate reaches or approaches a set temperature, and moves the glass plate out of the heating section.
  • the method solves the technical defects caused by the heating time and the operation experience to control the heating process of the glass plate, the following technical problems still exist: 1. During the heating process of the glass plate, the heating rate of each part is inconsistent, and the monitoring method Without contactless monitoring, it is difficult for the temperature sensor to accurately monitor the actual temperature reached by the glass plate.
  • the heating control effect is still not ideal. 2.
  • the temperature sensor In order to monitor the temperature of the glass plate, the temperature sensor needs to be in a high temperature environment for a long time. The temperature affects the reliability of the monitoring results and cannot distinguish between the furnace temperature and the glass plate temperature. 3. Since the glass plate is in a moving state in the heating furnace, the temperature sensor does not track the temperature of the glass plate at the same point in real time, and the measured temperature cannot fully reflect the actual temperature of the glass plate.
  • the object of the present invention is to solve the problem in the prior art that when the surface temperature of the glass plate is directly monitored by the sensor, the sensor is easily affected by the ambient temperature of the heating furnace, thereby causing inaccurate measurement, which may cause the glass plate to be prematurely discharged or released too late. As a result, the waste rate of the glass plate is greatly increased, resulting in waste of resources, and a method for controlling the release of the glass plate during the tempering process of the glass plate is provided.
  • the present invention is to solve the above technical problems, and the technical solution adopted is:
  • a method for controlling the release of a glass plate during a tempering process of a glass plate which is used for controlling the action of the glass plate after the heating process is completed in the heating furnace, and after the glass plate is sent into the heating furnace, the monitoring unit monitors the working parameters of the heating element in real time, and Filtering the working parameters of the heating element, and then transmitting the filtered heating element operating parameters to the control unit, the control unit compares the received heating element operating parameters with the set threshold, and the heating element operating parameters pass the most After the value, when the set threshold is reached during the change again, the control unit sends a command to the drive mechanism, and the drive mechanism directly sends the glass plate out of the heating furnace or sends the glass plate out of the heating furnace after a delay, thereby completing the glass plate. Heating process.
  • the control unit is a PLC or a PC.
  • the heating element adopts an electric heating element, and the working parameter is the total power of the heating element of the heating furnace; after the glass plate is sent into the heating furnace, the monitoring unit monitors the total heating power of the heating element in real time, and filters the total power of the heating element. Processing, and then transmitting the total power of the filtered heating element to the control unit and comparing with the set threshold W1.
  • the control is performed.
  • the unit sends a command to the driving mechanism, and the driving mechanism moves the glass plate directly out of the heating furnace or sends the glass plate out of the heating furnace after a delay, thereby completing the heating process of the glass plate.
  • the monitoring unit is an electric energy meter, and the total power of the heating element is monitored by the electric energy meter.
  • the threshold value W 1 W 0 ⁇ K, wherein K is a correction coefficient, and the value range is 0.9 ⁇ K ⁇ 1.1, and W 0 is a normal temperature state, and the heating element is monitored when the furnace is unloaded and reaches the working temperature.
  • the heating element adopts an electric heating element, and the working parameter is the total current value of the heating element of the heating furnace.
  • the monitoring unit monitors the real-time total current value of the heating element in real time, and totals the heating element.
  • the current value is filtered, and then the filtered total current value is transmitted to the control unit and compared with the set threshold A1.
  • the threshold value A1 is less than or equal to the threshold value during the falling process.
  • the monitoring unit is an ammeter, and the total current value of the heating element is monitored by an ammeter.
  • the threshold A 1 A 0 ⁇ K, wherein K is a correction coefficient, and the value range is 0.9 ⁇ K ⁇ 1.1, and A 0 is a heating element when the furnace is in an idle state and reaches a working temperature at a normal temperature state.
  • K is a correction coefficient
  • a 0 is a heating element when the furnace is in an idle state and reaches a working temperature at a normal temperature state.
  • the heating element adopts any one of an electric heating element or a gas heating element, and its working parameter is an opening ratio of all heating elements in the heating furnace, and the opening ratio of the heating element is the number of heating elements in an operating state.
  • the percentage of the total number of heating elements after the glass plate is fed into the heating furnace, the monitoring unit monitors the opening ratio of the heating element in real time, and filters the monitored turn-on ratio, and transmits the filtered turn-on ratio to the control unit.
  • the control unit issues a command to the driving mechanism, and the driving mechanism acts to directly send the glass plate to the heating furnace or delay After that, the glass plate is sent out of the heating furnace to complete the heating process of the glass plate.
  • the opening ratio is calculated by monitoring the number of heating elements in the working state by the monitoring unit, and running the formula: the number of heating elements in the working state / the total number of heating elements.
  • the threshold value K 1 K 0 ⁇ K, wherein K is a correction coefficient, and the value range is 0.9 ⁇ K ⁇ 1.1, and K 0 is a heating element when the furnace is in an idle state and reaches an operating temperature under normal temperature conditions.
  • K is a correction coefficient
  • K 0 is a heating element when the furnace is in an idle state and reaches an operating temperature under normal temperature conditions.
  • the opening ratio is required; when the K 0 is determined, the heating furnace needs to be operated at no load, and the opening ratio of the heating furnace to the working temperature is monitored multiple times, and the average value of the multiple measurement results can be taken, for example, 5 times. can.
  • the heating element adopts any one of an electric heating element or a gas heating element, and its working parameter is an opening ratio of all heating elements in the heating furnace, and the opening ratio of the heating element is a heating element in an off state.
  • the quantity accounts for the percentage of the total number of heating elements; after the glass plate is fed into the heating furnace, the monitoring unit monitors the opening ratio of the heating element in real time, and filters the disconnection ratio of the obtained heating element, and then filters the processed The disconnection ratio is transmitted to the control unit and compared with the threshold D1.
  • the control unit issues a command to the driving mechanism of the heating furnace to drive The mechanism moves the glass plate directly out of the heating furnace or sends the glass plate out of the heating furnace after a delay, thereby completing the heating process of the glass plate.
  • the disconnection ratio is calculated by monitoring the number of heating elements in the operating state by the monitoring unit, and the running formula: 1 - the number of heating elements in the working state / the total number of heating elements, is calculated.
  • the threshold D 1 D 0 ⁇ K, wherein K is a correction coefficient, and the value ranges from 0.9 ⁇ K ⁇ 1.1, and K 0 is a heating element when the furnace is in an idle state and reaches an operating temperature under normal temperature conditions.
  • the breaking ratio of D 0 is determined when the furnace needs to be operated at no load, and the disconnection ratio when the furnace reaches the working temperature is monitored multiple times, and the average value of the multiple measurement results can be taken, for example, measurement 5 You can do it twice.
  • the heating element adopts a gas heating element, and the working parameter is the gas flow value in the gas heating element of the heating furnace.
  • the monitoring unit monitors the gas flow value of the gas heating element in real time, and the gas flow rate is The value is filtered, and then the filtered gas flow value is transmitted to the control unit and compared with the set threshold R1.
  • the control unit sends a command to the driving mechanism, and the driving mechanism moves the glass plate directly out of the heating furnace or sends the glass plate out of the heating furnace after a delay, thereby completing the heating process of the glass plate.
  • the monitoring unit is a gas flow meter, and the gas flow value of the heating element is monitored by a gas flow meter.
  • the threshold R 1 R 0 ⁇ K, wherein K is a correction coefficient, and the value ranges from 0.9 ⁇ K ⁇ 1.1, and R 0 is a heating element when the furnace is in an idle state and reaches an operating temperature.
  • the threshold is manually input to the control unit through a human machine interface.
  • the corresponding standard threshold is determined according to the no-load operation, and the corresponding correction coefficient is selected.
  • the selection of K is adjusted according to the ambient temperature.
  • the method of selecting the correction coefficient K will be described by taking the total power of the heating element as an example. If the ambient temperature is higher than normal temperature, K is usually less than 1, because the external temperature is too high, the heat dissipation of the heating furnace is reduced, so the heat is dissipated to the outside under no-load conditions, thereby reducing the heat generated by the heating element, so the threshold needs to be adjusted.
  • the ambient temperature is lower than normal temperature, K is usually greater than 1, because the external temperature is too low, the heat dissipation of the heating furnace is increased, so the heat is radiated to the outside under no-load condition, thereby increasing the heat generated by the heating element. Therefore, it is necessary to adjust the threshold to increase. If the ambient temperature is equal to the normal temperature, K is taken as 1, that is, the threshold is not adjusted. After the correction coefficient is determined, the corresponding threshold is corrected and the corresponding threshold is determined, and then the threshold is determined by the operator. Enter into the control unit.
  • the filtering process is digital filtering processing or analog filtering processing.
  • the "operating temperature” in the present invention refers to the set heating temperature when the heating furnace is heated for different types of glass plates in the glass plate tempering treatment process, and the set heating temperature is determined according to the type of the glass plate. Adjustments, which are common knowledge of those skilled in the art, are not described in detail.
  • “Achieving a set threshold” in the present invention means that the heating element operating parameter is less than or equal to the threshold value during the descending process; or the heating element operating parameter is greater than or equal to the threshold value during the ascending process.
  • the heating process no longer depends on the experience and quality of the operator, not only reduces the labor cost, but also sets the database for the automation comparison or the manual comparison database to make the equipment more intelligent, the operation is more simple and convenient, and is conducive to the production process And the quality of the product is stable.
  • the system structure is simple, avoiding the direct monitoring of the glass plate in the high temperature state, and has high reliability.
  • Figure 1 is a graph showing the total power variation of an electric heating element in the present invention.
  • Figure 2 is a graph showing the total current change of an electric heating element in the present invention.
  • Fig. 3 is a graph showing changes in the turn-on ratio of an electric heating element in the present invention.
  • Fig. 4 is a graph showing changes in the breaking ratio of the electric heating element in the present invention.
  • Fig. 5 is a graph showing changes in gas flow rate using a gas heating element in the present invention.
  • the control process of the heating control method of the present invention is as follows:
  • the heating furnace to be used determines the heating furnace to be used, adjust the operating temperature of the heating furnace according to the type of the glass plate to be heated (for example, low-emission coated glass plate, white glass), and thickness information, and leave the heating furnace at ambient temperature at normal temperature.
  • the operation reaches the working temperature, monitors the total power value of the heating element in this state, and measures the total power value at five different times, and averages the five values, which is the standard threshold W 0 ;
  • the correction coefficient table (the correction coefficient K in the table is obtained by the following calculation method: respectively monitoring the total power value of the heating element when the furnace is not idling at different ambient temperatures to reach the working temperature, and dividing each total power value by W 0 After the calculation, the correction coefficient is determined.
  • the total power of the heating element is monitored in real time through the electric energy meter. Since the glass plate enters the heating furnace from a low temperature state, the heat is absorbed, and the temperature in the heating furnace will be lowered, in order to maintain the constant temperature of the heating furnace. In the working state, the heating elements in the working state will increase to provide more heat. At this time, the total heating power of the heating element increases rapidly, and reaches the highest value within a certain period of time and then remains constant; along with the temperature of the glass plate Gradually increasing, the difference between the temperature of the glass plate and the temperature inside the furnace is gradually reduced.
  • the speed at which the glass plate absorbs the heat in the heating furnace becomes slow, the temperature of the glass plate in the heating furnace tends to be constant, and the heating element is under working condition.
  • the number is gradually reduced, and the total power of the heating element is gradually decreasing.
  • the total power of the heating element is monitored to be lower than or equal to the set threshold W1, that is, the total power of the second monitoring is less than
  • W1 the set threshold value W1
  • the curve of the data curve is filtered, that is, at time T1
  • the control unit sends a command to the drive mechanism to transport the glass plate out of the heating furnace to complete the heating process and proceed to the next process.
  • the control process of the heating control method of the present invention is as follows:
  • the heating furnace to be used determines the heating furnace to be used, adjust the operating temperature of the heating furnace according to the type of the glass plate to be heated (for example, low-emission coated glass plate, white glass), and thickness information, and leave the heating furnace at ambient temperature at normal temperature.
  • the operation reaches the operating temperature, the total current of the heating element in this state is monitored, and the total current at five different times is measured, and the five values are averaged, which is the standard threshold A 0 .
  • the correction coefficient K in the table is obtained by the following calculation method: separately monitoring the total current value of the heating element when the furnace is not operating at any ambient temperature and reaching the working temperature at different ambient temperatures, dividing each total current value
  • the correction coefficient is determined by A 0
  • the total current of the heating element is monitored in real time through the ammeter. Since the glass plate enters the heating furnace from a low temperature state, the heat is absorbed, and the temperature in the heating furnace will be lowered, in order to maintain the constant temperature operation of the heating furnace. In the state, the heating elements in the working state will increase to provide more heat. At this time, the total heating current of the heating element increases rapidly, and reaches the highest value within a certain period of time and then remains constant; along with the temperature of the glass plate Gradually increasing, the difference between the temperature of the glass plate and the temperature inside the furnace is gradually reduced.
  • the speed at which the glass plate absorbs the heat in the heating furnace becomes slow, the temperature of the glass plate in the heating furnace tends to be constant, and the heating element is under working condition.
  • the number is gradually reduced, and the total current of the heating element is gradually decreasing.
  • the electric energy meter connected to the heating element detects that the total current of the heating element is lower than or equal to the set threshold A1 for the second time, it is monitored during the falling process.
  • the total current to the heating element is lower than or equal to the set threshold A1, that is, the glass plate is judged to be heated to a temperature suitable for the tempering process.
  • T1 corresponding to time T1, at this time as shown in Fig.
  • the control process of the heating control method of the present invention is as follows:
  • the heating furnace to be used determines the heating furnace to be used, adjust the working temperature of the heating furnace according to the type of the glass plate to be heated (for example, low-emission coated glass plate, white glass), thickness information, and operate the heating furnace at ambient temperature at normal temperature.
  • the operating temperature is reached, the turn-on ratio of the heating element in this state is monitored, and the turn-on ratios at five different times are measured, and the five values are averaged, the average value is the standard threshold K 0 , the ambient temperature is measured, and the correction is corrected.
  • the correction coefficient K in the table is obtained by the following calculation method: separately monitoring the opening ratio of the heating element when the no-load operation of the furnace reaches the working temperature at different ambient temperatures, and calculating each opening ratio by K 0 )
  • the number of heating elements in the working state is monitored by the monitoring unit in real time, and the formula: the number of heating elements in the working state / the total number of heating elements is calculated, and the opening ratio of the heating elements is calculated. Since the glass plate enters the heating furnace from a low temperature state, it begins to absorb heat. At this time, the temperature inside the heating furnace will decrease. In order to maintain the constant temperature working state, the heating elements in the working state will increase, and the opening ratio of the heating element will increase rapidly.
  • the temperature is gradually reduced; as the temperature of the glass plate is gradually increased, the temperature difference between the temperature of the glass plate and the temperature in the furnace is gradually reduced, and at this time, the speed of the heat absorption in the heating furnace is slowed down by the glass plate.
  • the temperature of the inner glass plate tends to be constant, the number of the heating elements in the working state is gradually reduced, and the opening ratio of the heating element is gradually decreasing.
  • the opening of the heating element is less than or equal to the set threshold K1 for the second time.
  • the glass plate is heated to a temperature t1 suitable for the tempering process, corresponding to the time T1, at this time as shown in FIG. 3 (in this figure)
  • the curve is based on the change of the turn-on ratio of the monitored heating element, and then the filter curve is processed on the data curve), that is, at time T1, by the control
  • the unit sends a command to the drive mechanism to transport the glass plate out of the furnace to complete the heating process and proceed to the next process.
  • the control process of the heating control method of the present invention is as follows:
  • the correction coefficient table the correction coefficient K in the table is obtained by the following calculation method: separately monitoring the
  • the monitoring unit monitors the number of heating elements in the working state in real time, and then runs the formula: 1-the number of heating elements in the working state/the total number of heating elements, and the heating element is calculated. Open ratio. Since the glass plate enters the heating furnace from a low temperature state, it begins to absorb heat. At this time, the temperature inside the heating furnace will decrease. In order to maintain the constant temperature working state, the heating elements in the working state will increase, and the breaking ratio of the heating element will decrease.
  • the temperature is gradually reduced; as the temperature of the glass plate is gradually increased, the temperature difference between the temperature of the glass plate and the temperature in the furnace is gradually reduced, and at this time, the temperature of the heat absorbed by the glass plate in the heating furnace is slowed down, and the heating is slowed.
  • the temperature of the glass plate in the furnace tends to be constant, the number of the heating elements in the working state is gradually reduced, and the breaking ratio of the heating element is gradually increased.
  • the glass plate When the rising ratio of the heating element is monitored during the ascending process is higher than or equal to the set threshold D1, that is, the glass plate is heated to a temperature t1 suitable for the tempering process, corresponding to the time T1, as shown in FIG. 4 (
  • the curve in this figure is based on the change of the disconnection ratio of the monitored heating element, and then the filter curve is processed on the data curve), that is, at time T1, by the control unit
  • the drive mechanism is instructed to transport the glass plate out of the furnace to complete the heating process and proceed to the next process.
  • the control process of the heating control method of the present invention is as follows:
  • the heating furnace to be used determines the heating furnace to be used, adjust the working temperature of the heating furnace according to the type of the glass plate to be heated (for example, low-emission coated glass plate, white glass), thickness information, and operate the heating furnace at ambient temperature at normal temperature.
  • the working temperature is reached, the gas flow rate of the heating element in this state is monitored, and the gas flow rate at five different times is measured, and five values are averaged, the average value is the standard threshold R 0 , the ambient temperature is measured, and the correction coefficient is compared.
  • the correction factor K in the table is obtained by the following calculation method: separately monitoring the gas flow rate of the heating element when the no-load operation of the furnace reaches the working temperature at different ambient temperatures, and calculating the gas flow value by dividing R 0 )
  • the total gas flow rate of the heating element is monitored in real time through the gas flow meter. Since the glass plate enters the heating furnace from a low temperature state, heat is absorbed, and the temperature in the heating furnace will be lowered, in order to maintain the heating furnace. In the constant temperature working state, the heating elements in the working state will increase to provide more heat, and the gas flow rate of the heating element increases rapidly, and reaches the highest value within a certain period of time and then remains unchanged; The temperature of the plate gradually increases, and the temperature difference between the temperature of the glass plate and the temperature in the furnace gradually decreases.
  • the speed of the heat absorption in the heating furnace is slowed, the temperature of the glass plate in the heating furnace tends to be constant, and the heating element is in a working state.
  • the number of the lower part is gradually reduced, and the gas flow rate is gradually decreasing.
  • the gas flow meter connected to the heating element detects that the gas flow rate of the heating element is less than or equal to the set threshold value R1 for the second time, it is monitored during the descending process.
  • the gas flow rate is lower than or equal to the set threshold R1, that is, the glass plate is heated to a temperature t1 suitable for the tempering process, Corresponding to time T1, at this time, as shown in Fig.
  • control unit drives The agency issues instructions to transport the glass sheet out of the furnace to complete the heating process and proceed to the next step.
  • the thresholds W 1 , A 1 , K 1 , D 1 and R 1 in the above embodiments 1 to 10 can also be obtained by the operator inputting the correction coefficient K into the control unit through the human-machine interface, the control unit according to The formula calculates the corresponding threshold.
  • normal temperature in the present invention means 25 ° C, but those skilled in the art will easily think of replacing "normal temperature” with other temperatures, thereby obtaining a corresponding standard threshold.

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Abstract

一种玻璃板钢化工艺过程中控制玻璃板出炉的方法，玻璃板送入加热炉后，监测单元实时监测加热元件工作参数，并对加热元件工作参数进行滤波处理，然后将经过滤波处理后的加热元件工作参数传递给控制单元，控制单元将接收到的加热元件工作参数与设定的阈值进行比对，加热元件工作参数经过最值后，再次发生变化的过程中达到设定的阈值时，控制单元给驱动机构发出指令，驱动机构动作直接将玻璃板送出加热炉或延时后将玻璃板送出加热炉，从而完成玻璃板的加热过程，改变了以时间作为依据的传统控制方法，不仅降低了钢化玻璃生产过程中的能耗，而且提高了钢化玻璃的成品质量。

Description

一种玻璃板钢化工艺过程中控制玻璃板出炉的方法 技术领域
本发明涉及一种玻璃板的生产工艺，尤其是涉及一种玻璃板钢化工艺过程中控制玻璃板出炉的方法。
背景技术
在玻璃板的钢化处理工艺中，首先要将玻璃板加热至软化温度(例如，600℃至700℃)，然后通过快速冷却完成钢化处理。其中，对玻璃板的加热是一项重要的工艺控制过程，现有技术中，通常是通过加热时间来控制玻璃板的加热过程，即根据玻璃板的厚度乘以时间系数，估算出玻璃板的加热时间，当达到设定的加热时间后玻璃板出炉。这种依靠经验来控制玻璃板加热过程的方式存在下列技术缺陷：1、玻璃板加热温度不容易精确控制，玻璃板经常出现加热温度不足或过烧的现象，直接对玻璃板的钢化质量造成不利影响，例如钢化应力不达标、玻璃板平整度不合格；2、如果加热时间过长，则会造成一定的能源浪费，提高生产成本；3、过渡依赖操作人员的经验和素质，不仅增加人工成本，而且不利于产品合格率的提高和品质的长期稳定。
有中国专利申请公开了一种玻璃板钢化过程中玻璃板的加热方法，提出：在玻璃板钢化炉的加热段设置若干用于探测加热段内玻璃板温度的温度传感器，当玻璃板在加热过程中，温度传感器探测到玻璃板的温度达到或接近设定温度时，将玻璃板移出加热段。该方法虽然解决了依靠加热时间和操作经验控制玻璃板的加热过程时所产生的技术缺陷，但依然存在以下技术问题：1、玻璃板在加热过程中，由于各部的升温速度不一致，且监测方法未非接触式监测，导致温度传感器很难准确监测玻璃板所达到的实际温度，加热控制效果仍旧不理想；2、为了监测玻璃板的温度，温度传感器需要长期处于高温环境中，环境内的炉温会影响到监测结果的可靠性无法区分具体是炉子温度还是玻璃板温度。3、由于玻璃板在加热炉内处于运动状态，因此温度传感器不是实时跟踪玻璃板同一点温度，所测温度不能全面反映玻璃板实际温度。
发明内容
本发明的目的是为解决现有技术中，采用传感器直接监测玻璃板表面温度时，传感器容易被加热炉的环境温度所影响从而造成测量不准确，会造成玻璃板过早出炉或者过晚出炉，从而造成玻璃板产生废品率大增，造成资源浪费的问题，提供一种玻璃板钢化工艺过程中控制玻璃板出炉的方法。
本发明为解决上述技术问题的不足，所采用的技术方案是：
一种玻璃板钢化工艺过程中控制玻璃板出炉的方法，用于玻璃板在加热炉内完成加热过程后出炉动作的控制，玻璃板送入加热炉后，监测单元实时监测加热元件工作参数，并对加热元件工作参数进行滤波处理，然后将经过滤波处理后的加热元件工作参数传递给控制单元，控制单元将接收到的加热元件工作参数与设定的阈值进行比对，加热元件工作参数经过最值后，再次发生变化的过程中达到设定的阈值时，控制单元给驱动机构发出指令，驱动机构动作直接将玻璃板送出加热炉或延时后将玻璃板送出加热炉，从而完成玻璃板的加热过程。
所述的控制单元为PLC或PC机。
所述的加热元件采用电加热元件，其工作参数为加热炉加热元件的总功率；玻璃板送入加热炉后，监测单元实时监测加热元件的加热总功率，并对加热元件的总功率进行滤波处理，然后将滤波处理后的加热元件的总功率传递至控制单元内与设定的阈值W1比对，当加热元件的总功率经过最大值后，在下降过程中小于或等于阈值W1时，控制单元发出指令给驱动机构，驱动机构动作直接将玻璃板送出加热炉或延时后将玻璃板送出加热炉，从而完成玻璃板的加热过程。
所述的监测单元为电能表，通过电能表监测加热元件的总功率。
所述的阈值W 1＝W 0·K，其中，K为修正系数，其取值范围为0.9≤K≤1.1，W 0为常温状态下，加热炉空载并达到工作温度时监测到加热元件的加热总功率；W 0确定时需要将加热炉空载运行，并对监测到加热炉达到工作温度时的加热总功率进行多次监测，取多次测量结果的平均值即可，例如测量5次即可。
所述的加热元件采用电加热元件，其工作参数为加热炉的加热元件的总电流值，玻璃板送入加热炉后，监测单元实时监测加热元件的实时总电流值，并对加热元件的总电流值进行滤波处理，然后将滤波处理后的总电流值传递至控制单元内与设定的阈值A1比对，当加热元件的总电流值经过最大值后，在下降过程中小于或等于阈值A1时，控制单元发出指令给加热炉的驱动机构，驱动机构动作直接将玻璃板送出加热炉或延时后将玻璃板送出加热炉，从而完成玻璃板的加热过程。
所述的监测单元为电流表，通过电流表监测加热元件的总电流值。
所述的阈值A 1＝A 0·K，其中，K为修正系数，其取值范围为0.9≤K≤1.1，A 0为常温状态下，加热炉空载状态并达到工作温度时加热元件的总电流值；A 0确定时需要将加热炉空载运行，并对监测到加热炉达到工作温度时的总电流值进行多次监测，取多次测量结果的平均值即可，例如测量5次即可。
所述的加热元件采用电加热元件或燃气加热元件中的任意一种，其工作参数为加热炉中所有加热元件的开通比，所述的加热元件的开通比为工作状态下的加热元件的数量占全部加热元件的数量的百分比；玻璃板送入加热炉后，监测单元实时监测加热元件的开通比，并将监测得到的开通比进行滤波处理，并将滤波处理后的开通比传递至控制单元内与阈值K1比对，当加热元件的开通比经过最大值后，在下降过程中小于或等于阈值K1时，控制单元发出指令给驱动机构，驱动机构动作直接将玻璃板送出加热炉或延时后将玻璃板送出加热炉，从而完成玻璃板的加热过程。
所述的开通比通过监测单元监测工作状态下的加热元件的数量后，运行公式：工作状态下的加热元件的数量/加热元件的总数量，计算得出。
所述的阈值K 1＝K 0·K，其中，K为修正系数，其取值范围为0.9≤K≤1.1，K 0为常温状态下，加热炉空载状态并达到工作温度时的加热元件的开通比；K 0确定时需要将加热炉空载运行，并对监测到加热炉达到工作温度时的开通比进行多次监测，取多次测量结果的平均值即可，例如测量5次即可。
所述的加热元件采用电加热元件或燃气加热元件中的任意一种，其工作参数为加热炉中所有加热元件的断开比，所述加热元件的断开比为断开状态下的加热元件的数量占全部加热元件的数量的百分比；玻璃板送入加热炉后，监测单元实时监测加热元件的断开比，并将监测得到的加热元件的断开比进行滤波处理，然后将滤波处理后的断开比传递至控制单元内与阈值D1比对，当加热元件的断开比经过最小值后，在上升过程中大于或等于阈值D1时，控制单元发出指令给加热炉的驱动机构，驱动机构动作直接将玻璃板送出加热炉或延时后将玻璃板送出加热炉，从而完成玻璃板的加热过程。
所述的断开比通过监测单元监测工作状态下的加热元件的数量后，运行公式：1-工作状态下的加热元件的数量/加热元件的总数量，计算得出。
所述的阈值D 1＝D 0·K，其中，K为修正系数，其取值范围为0.9≤K≤1.1，K 0为常温状态下，加热炉空载状态并达到工作温度时的加热元件的断开比；D 0确定时需要将加热炉空载运行，并对监测到加热炉达到工作温度时的断开比进行多次监测，取多次测量结果的平均值即可，例如测量5次即可。
所述的加热元件采用燃气加热元件，其工作参数为加热炉的燃气加热元件中的燃气流量值，玻璃板送入加热炉后，监测单元实时监测燃气加热元件的燃气流量值，并对燃气流量值进行滤波处理，然后将滤波处理后的燃气流量值传递至控制单元内与设定的阈值R1比对，当加热元件的燃气流量值经过最大值后，在下降过程中小于或等于阈值R1时，控制单 元发出指令给驱动机构，驱动机构动作直接将玻璃板送出加热炉或延时后将玻璃板送出加热炉，从而完成玻璃板的加热过程。
所述的监测单元为燃气流量表，通过燃气流量表监测加热元件的燃气流量值。
所述的阈值R 1＝R 0·K，其中，K为修正系数，其取值范围为0.9≤K≤1.1，R 0为常温状态下，加热炉空载状态并达到工作温度时加热元件的燃气流量值；R 0确定时需要将加热炉空载运行，并对监测到加热炉达到工作温度时的燃气流量值进行多次监测，取多次测量结果的平均值即可，例如测量5次即可。
所述的阈值由人工通过人机界面输入到所述控制单元。根据空载运行确定对应的标准阈值，并选择对应的修正系数。K的选取根据环境温度进行调整。下面以加热元件的总功率为例说明修正系数K的选取方法。如果环境温度高于常温时，K通常取小于1，因为外界温度过高，加热炉散热减少，因此空载状态下，往外界散发热量减少，从而减少了加热元件产生的热量，因此需要调整阈值减小；如果环境温度低于常温时，K通常取大于1，因为外界温度过低，加热炉散热增加，因此空载状态下，往外界散发热量增大，从而增大了加热元件产生的热量，因此需要调整阈值增大，如果环境温度等于常温时，K取1，即为阈值不做调整，确定修正系数后，与对应的标准阈值进行修正后确定对应阈值，然后通过操作工人将该阈值输入到控制单元内。
所述的滤波处理为数字滤波处理或模拟滤波处理。
本发明的中“工作温度”是指：在玻璃板钢化处理工艺中，加热炉针对不同种类玻璃板进行加热时，所设定的加热温度，该设定的加热温度会根据玻璃板的种类进行调整，此为本领域技术人员的公知常识，故此不做详细描述。
本发明中的“达到设定的阈值”是指：加热元件工作参数在下降过程中小于或等于该阈值；或者加热元件工作参数在上升过程中大于或等于该阈值。
本发明的有益效果是：
1、打破了本技术领域以时间作为依据的传统控制方法，通过对加热炉运行过程中的加热元件工作参数(加热元件的总功率、总电流、开通比或者断开比，或者燃气加热元件的燃气流量值)进行实时监测，替代了直接监测加热炉内部温度的传统方式，该监测方式可以避免监测大面积的玻璃板温度，避免玻璃板温度测量不便的问题，而加热元件的电学信息很容易监测，因此通过监控加热元件信息变化来观察玻璃板，因为玻璃板在恒温加热炉内进行加热，加热炉又要保持恒温，因此加热元件产生的热量将会传递给玻璃板，因此玻璃板温度的变化所需的热量完全是通过加热元件工作状态的变化提供的，间接监测加热元件信息可以更加科 学、精确地控制玻璃板的加热过程，从而准确地判断玻璃板的出炉时刻，不仅降低了钢化玻璃板生产过程中的能耗，而且提高了钢化玻璃板的成品质量。
2、加热过程不再依赖操作人员的经验、素质，不仅降低了人工成本，而且设置数据库可以为自动化对比也可以为人工对比数据库使设备更加智能化，操作起来更加简单、便捷，有利于生产工艺和产品品质的稳定。
3、系统结构简单，避免了对处于高温状态的玻璃板直接监测，具有较高的可靠性。
附图说明
图1为本发明中采用电加热元件的总功率变化曲线图。
图2为本发明中采用电加热元件的总电流变化曲线图。
图3为本发明中采用电加热元件的开通比的变化曲线图。
图4为本发明中采用电加热元件的断开比的变化曲线图。
图5为本发明中采用燃气加热元件的燃气流量值的变化曲线图。
具体实施方式
以下结合附图详细描述本发明的实施例，具体实施方式如下：
实施例1
如图1所示，以电加热元件的总功率为例，本发明加热控制方法的控制过程如下：
首先，确定待使用的加热炉，根据待加热玻璃板的种类(例如低辐射镀膜玻璃板、白玻)、厚度信息调整加热炉的工作温度，将加热炉在环境温度为常温状态下，空载运行到达工作温度，监测该状态下的加热元件的总功率值，并测量五个不同时刻的总功率值，将五个数值进行求平均值，该平均值即为标准阈值W 0；测量环境温度，对照修正系数表格(该表格中修正系数K通过以下计算方法得到：分别监测不同环境温度下的加热炉空载运行到达工作温度时加热元件的总功率值，将各个总功率值除以W 0后计算得到)确定修正系数，根据修正系数K和W 0通过公式：W 1＝W 0·K，计算得到阈值W 1，操作工人通过人机界面将该阈值W 1输入到控制单元中。
当玻璃板进入加热炉后，通过电能表实时监测加热元件的总功率，由于玻璃板由低温状态进入加热炉后，开始吸收热量，此时加热炉内温度将会降低，为了保持加热炉的恒温工作状态，工作状态下的加热元件将会增多，以便于提供更多热量，此时加热元件的加热总功率快速增加，并在一定时间内达到最高值后衡定不变；随着玻璃板温度逐渐升高，玻璃板温度与炉膛内的温度差值逐步减小，此时玻璃板吸取加热炉内热量的速度变慢，加热炉内玻璃板的温度趋于恒定，加热元件处于工作状态下的数量逐渐减少，加热元件的总功率呈逐步 下降趋势，当与加热元件连接的电能表监测到加热元件的总功率经过最大值后，再次小于或等于设定的阈值W1时，即为在下降过程中监测到加热元件的总功率低于或等于设定的阈值W1，也就是第二次监测到加热总功率小于或等于设定的阈值W1时，即判断玻璃板被加热至满足钢化工艺合适的温度t1，对应时刻T1，此时如图1(此图中的曲线是根据监测的加热元件的总功率的变化，然后对数据曲线进行滤波处理后的曲线图)，即在T1时刻，由控制单元给驱动机构发出指令，将玻璃板输送出加热炉，完成加热过程，进入下一个工序。
实施例2
如图2所示，以电加热元件的总电流为例，本发明加热控制方法的控制过程如下：
首先，确定待使用的加热炉，根据待加热玻璃板的种类(例如低辐射镀膜玻璃板、白玻)、厚度信息调整加热炉的工作温度，将加热炉在环境温度为常温状态下，空载运行到达工作温度，监测该状态下的加热元件的总电流，并测量五个不同时刻的总电流，对五个数值进行求平均值，该平均值即为标准阈值A 0。测量环境温度，对照修正系数表格(该表格中修正系数K通过以下计算方法得到：分别监测不同环境温度下的加热炉空载运行到达工作温度时加热元件的总电流值，将各个总电流值除以A 0后计算得到)确定修正系数，根据修正系数K和A 0通过公式阈值A 1＝A 0·K，计算得到阈值，操作工人通过人机界面将该阈值A 1输入到控制单元中。
当玻璃板进入加热炉后，通过电流表实时监测加热元件的总电流，由于玻璃板由低温状态进入加热炉后，开始吸收热量，此时加热炉内温度将会降低，为了保持加热炉的恒温工作状态，处于工作状态下的加热元件将会增多，以便于提供更多热量，此时加热元件的加热总电流快速增加，并在一定时间内达到最高值后衡定不变；随着玻璃板温度逐渐升高，玻璃板温度与炉膛内的温度差值逐步减小，此时玻璃板吸取加热炉内热量的速度变慢，加热炉内玻璃板的温度趋于恒定，加热元件处于工作状态下的数量逐渐减少，加热元件的总电流呈逐步下降趋势，当与加热元件连接的电能表监测到加热元件的总电流第二次低于或等于设定的阈值A1时，即为在下降过程中监测到加热元件的总电流低于或等于设定的阈值A1，即判断玻璃板被加热至满足钢化工艺合适的温度t1，对应时刻T1，此时如图2(此图中的曲线时根据监测的加热元件的总电流的变化，然后对数据曲线进行滤波处理后的曲线图)，即在T1时刻，由控制单元给驱动机构发出指令，将玻璃板输送出加热炉，完成加热过程，进入下一个工序。
实施例3
如图3所示，以电加热元件的开通比为例，本发明加热控制方法的控制过程如下：
首先确定待使用的加热炉，根据待加热玻璃板的种类(例如低辐射镀膜玻璃板、白玻)、厚度信息调整加热炉的工作温度，将加热炉在环境温度为常温状态下，空载运行到达工作温度，监测该状态下的加热元件的开通比，并测量五个不同时刻的开通比，对五个数值进行求平均值，该平均值即为标准阈值K 0，测量环境温度，对照修正系数表格(该表格中修正系数K通过以下计算方法得到：分别监测不同环境温度下的加热炉空载运行到达工作温度时加热元件的开通比，将各个开通比值除以K 0后计算得到)确定修正系数，根据修正系数K和K 0通过公式阈值K 1＝K 0·K，计算得到阈值，操作工人通过人机界面将该阈值K 1输入到控制单元中。
当玻璃板进入加热炉后，通过监测单元实时监测工作状态下的加热元件的数量后，运行公式：工作状态下的加热元件的数量/加热元件的总数量，计算得出加热元件的开通比。由于玻璃板由低温状态进入加热炉后，开始吸收热量，此时加热炉内温度将会降低，为了保持恒温工作状态，处于工作状态下的加热元件将会增多，加热元件的开通比快速增加，并在一定时间内达到最高值后衡定；随着玻璃板温度逐渐升高，玻璃板温度与炉膛内的温度差值逐步缩小，此时玻璃板吸取加热炉内热量的速度变慢，加热炉内玻璃板的温度趋于恒定，加热元件处于工作状态下的数量逐渐减少，加热元件的开通比呈逐步下降趋势，当加热元件的开通比第二次小于或等于设定的阈值K1时，即为在下降过程中监测到加热元件的开通低于或等于设定的阈值K1，即判断玻璃板被加热至满足钢化工艺合适的温度t1，对应时刻T1，此时如图3(此图中的曲线时根据监测的加热元件的开通比的变化，然后对数据曲线进行滤波处理后的曲线图)，即在T1时刻，由控制单元给驱动机构发出指令，将玻璃板输送出加热炉，完成加热过程，进入下一个工序。
实施例4
如图4所示，以电加热元件的断开比为例，本发明加热控制方法的控制过程如下：
首先确定待使用的加热炉，根据待加热玻璃板的种类(例如低辐射镀膜玻璃板、白玻)、厚度信息调整加热炉的工作温度，将加热炉在环境温度为常温状态下，空载运行到达工作温度，监测该状态下的加热元件的断开比，并测量五个不同时刻的断开比，对五个数值进行求平均值，该平均值即为标准阈值D 0，测量环境温度，对照修正系数表格(该表格中修正系数K通过以下计算方法得到：分别监测不同环境温度下的加热炉空载运行到达工作温度时加热元件的断开比，将各个断开比值除以D 0后计算得到)确定修正系数，根据修正系数K和D 0通过公式阈值D 1＝D 0·K，计算得到阈值，操作工人通过人机界面将该阈值D 1输入到控制单元中。
当玻璃板进入加热炉后，通过监测单元实时监测工作状态下的加热元件的数量后，运行公式：1-工作状态下的加热元件的数量/加热元件的总数量，计算得出加热元件的断开比。由于玻璃板由低温状态进入加热炉后，开始吸收热量，此时加热炉内温度将会降低，为了保持恒温工作状态，处于工作状态下的加热元件将会增多，加热元件的断开比减小，并在一定时间内达到最小值后衡定；随着玻璃板温度逐渐升高，玻璃板温度与炉膛内的温度差值逐步缩小，此时玻璃板吸取加热炉内热量的速度变慢，加热炉内玻璃板的温度趋于恒定，加热元件处于工作状态下的数量逐渐减少，加热元件的断开比呈逐步上升趋势，当加热元件的断开比第二次大于或等于设定的阈值D1时即为在上升过程中监测到加热元件的断开比高于或等于设定的阈值D1，即判断玻璃板被加热至满足钢化工艺合适的温度t1，对应时刻T1，此时如图4(此图中的曲线时根据监测的加热元件的断开比的变化，然后对数据曲线进行滤波处理后的曲线图)，即在T1时刻，由控制单元给驱动机构发出指令，将玻璃板输送出加热炉，完成加热过程，进入下一个工序。
实施例5
如图5所示，以燃气加热元件的燃气流量为例，本发明加热控制方法的控制过程如下：
首先确定待使用的加热炉，根据待加热玻璃板的种类(例如低辐射镀膜玻璃板、白玻)、厚度信息调整加热炉的工作温度，将加热炉在环境温度为常温状态下，空载运行到达工作温度，监测该状态下的加热元件的燃气流量，并测量五个不同时刻的燃气流量，五个数值进行求平均值，该平均值即为标准阈值R 0，测量环境温度，对照修正系数表格(该表格中修正系数K通过以下计算方法得到：分别监测不同环境温度下的加热炉空载运行到达工作温度时加热元件的燃气流量，将各个燃气流量值除以R 0后计算得到)确定修正系数，根据修正系数K和R 0通过公式阈值R 1＝R 0·K，计算得到阈值，操作工人通过人机界面将该阈值R 1输入到控制单元中。
当玻璃板进入加热炉后，通过燃气流量表实时监测加热元件的总燃气流量，由于玻璃板由低温状态进入加热炉后，开始吸收热量，此时加热炉内温度将会降低，为了保持加热炉的恒温工作状态，处于工作状态下的加热元件将会增多，以便于提供更多热量，此时加热元件的燃气流量快速增加，并在一定时间内达到最高值后衡定不变；随着玻璃板温度逐渐升高，玻璃板温度与炉膛内的温度差值逐步减小，此时玻璃板吸取加热炉内热量的速度变慢，加热炉内玻璃板的温度趋于恒定，加热元件处于工作状态下的数量逐渐减少，燃气流量呈逐步下降趋势，当与加热元件连接的燃气流量表监测到加热元件的燃气流量第二次小于或等于设定的阈值R1时，即为在下降过程中监测到燃气流量低于或等于设定的阈值R1，即判断玻 璃板被加热至满足钢化工艺合适的温度t1，对应时刻T1，此时如图5(此图中的曲线时根据监测的加热元件的燃气流量的变化，然后对数据曲线进行滤波处理后的曲线图)，即在T1时刻，由控制单元给驱动机构发出指令，将玻璃板输送出加热炉，完成加热过程，进入下一个工序。
上述实施例1至实施例中的阈值W 1、A 1、K 1、D 1和R 1还可以通过以下方法获得：操作工人通过人机界面将修正系数K输入到控制单元中，控制单元根据公式计算出相应的阈值。
需要说明的是：本发明中的“常温”是指25℃，但本领域技术人员容易想到将“常温”替换为其他温度，从而获得相应的标准阈值。
本发明所列举的技术方案和实施方式并非是限制，与本发明所列举的技术方案和实施方式等同或者效果相同方案都在本发明所保护的范围内。

Claims (18)

  1. 一种玻璃板钢化工艺过程中控制玻璃板出炉的方法，包括用于加热玻璃板的加热炉，加热炉设有监测单元、控制单元和驱动机构，其特征在于：将加热炉空载运行到达工作温度时对应的加热元件工作参数数值输入到控制单元以设定阈值，玻璃板送入加热炉后在炉内加热的过程中，监测单元对监测到的加热元件工作参数进行滤波处理，然后将经过滤波处理后的加热元件工作参数传递给控制单元，控制单元将接收到的加热元件工作参数与阈值进行比对，加热元件工作参数经过最值后，再次发生变化的过程中达到阈值时，控制单元给驱动机构发出指令，驱动机构动作直接将玻璃板送出加热炉或延时后将玻璃板送出加热炉，从而完成玻璃板的加热过程，所述的工作参数为加热元件的总功率，或者加热元件的总电流值，或者加热元件的开通比，或者加热元件的断开比，或者加热元件的燃气流量值。
  2. 根据权利要求1所述的一种玻璃板钢化工艺过程中控制玻璃板出炉的方法，其特征在于：所述的加热元件采用电加热元件，其工作参数为加热炉加热元件的总功率；玻璃板送入加热炉后，监测单元实时监测加热元件的总功率，并对加热元件的总功率进行滤波处理，然后将滤波处理后的加热元件的总功率传递至控制单元内与设定的阈值W1比对，当加热元件的总功率经过最大值后，在下降过程中小于或等于阈值W1时，控制单元发出指令给驱动机构，驱动机构动作直接将玻璃板送出加热炉或延时后将玻璃板送出加热炉，从而完成玻璃板的加热过程。
  3. 根据权利要求2所述的一种玻璃板钢化工艺过程中控制玻璃板出炉的方法，其特征在于：所述的监测单元为电能表。
  4. 根据权利要求2所述的一种玻璃板钢化工艺过程中控制玻璃板出炉的方法，其特征在于：所述的阈值W 1＝W 0·K，其中，K为修正系数，其取值范围为0.9≤K≤1.1，W 0为常温状态下，加热炉空载状态并达到工作温度时加热元件的总功率。
  5. 根据权利要求1所述的一种玻璃板钢化工艺过程中控制玻璃板出炉的方法，其特征在于：所述的加热元件采用电加热元件，其工作参数为加热炉的加热元件的总电流值；玻璃板送入加热炉后，监测单元实时监测加热元件的总电流值，并对加热元件的总电流值进行滤波处理，然后将滤波处理后的总电流值传递至控制单元内与设定的阈值A1比对，当加热元件的总电流值经过最大值后，在下降过程中小于或等于阈值A1时，控制单元发出指令给驱动机构，驱动机构动作直接将玻璃板送出加热炉或延时后将玻璃板送出加热炉，从而完成玻璃板的加热过程。
  6. 根据权利要求5所述的一种玻璃板钢化工艺过程中控制玻璃板出炉的方法，其特征在于：所述的监测单元为电流表。
  7. 根据权利要求5所述的一种玻璃板钢化工艺过程中控制玻璃板出炉的方法，其特征在于：所述的阈值A 1＝A 0·K，其中，K为修正系数，其取值范围为0.9≤K≤1.1，A 0为常温状态下，加热炉空载状态并达到工作温度时加热元件的总电流值。
  8. 根据权利要求1所述的一种玻璃板钢化工艺过程中控制玻璃板出炉的方法，其特征在于：所述的加热元件采用电加热元件或燃气加热元件中的任意一种，其工作参数为加热炉中所有加热元件的开通比，所述的加热元件的开通比为工作状态下的加热元件的数量占全部加热元件的数量的百分比；玻璃板送入加热炉后，监测单元实时监测加热元件的开通比，并将监测得到的加热元件的开通比进行滤波处理，然后将滤波处理后的开通比传递至控制单元内与阈值K1比对，当加热元件的开通比经过最大值后，在下降过程中小于或等于阈值K1时，控制单元发出指令给驱动机构，驱动机构动作直接将玻璃板送出加热炉或延时后将玻璃板送出加热炉，从而完成玻璃板的加热过程。
  9. 根据权利要求8所述的一种玻璃板钢化工艺过程中控制玻璃板出炉的方法，其特征在于：所述的开通比通过监测单元监测工作状态下的加热元件的数量后，运行公式：工作状态下的加热元件的数量/加热元件的总数量，计算得出。
  10. 根据权利要求8所述的一种玻璃板钢化工艺过程中控制玻璃板出炉的方法，其特征在于：所述的阈值K 1＝K 0·K，其中，K为修正系数，其取值范围为0.9≤K≤1.1，K 0为常温状态下，加热炉空载状态并达到工作温度时加热元件的开通比。
  11. 根据权利要求1所述的一种玻璃板钢化工艺过程中控制玻璃板出炉的方法，其特征在于：所述的加热元件采用电加热元件或燃气加热元件中的任意一种，其工作参数为加热炉中所有加热元件的断开比，所述加热元件的断开比为断开状态下的加热元件的数量占全部加热元件的数量的百分比；玻璃板送入加热炉后，监测单元实时监测加热元件的断开比，并将监测得到的加热元件的断开比进行滤波处理，然后将滤波处理后的断开比传递至控制单元内与阈值D1比对，当加热元件的断开比经过最小值后，在上升过程中大于或等于阈值D1时，控制单元发出指令给驱动机构，驱动机构动作直接将玻璃板送出加热炉或延时后将玻璃板送出加热炉，从而完成玻璃板的加热过程。
  12. 根据权利要求11所述的一种玻璃板钢化工艺过程中控制玻璃板出炉的方法，其特征在于：所述的断开比通过监测单元监测工作状态下的加热元件的数量后，运行公式：1-工作状态下的加热元件的数量/加热元件的总数量，计算得出。
  13. 根据权利要求11所述的一种玻璃板钢化工艺过程中控制玻璃板出炉的方法，其特征在于：所述的阈值D 1＝D 0·K，其中，K为修正系数，其取值范围为0.9≤K≤1.1，D 0为常温 状态下，加热炉空载状态并达到工作温度时加热元件的断开比。
  14. 根据权利要求1所述的一种玻璃板钢化工艺过程中控制玻璃板出炉的方法，其特征在于：所述的加热元件采用燃气加热元件，其工作参数为加热炉的加热元件的燃气流量值；玻璃板送入加热炉后，监测单元实时监测加热元件的燃气流量值，并对燃气流量值进行滤波处理，然后将滤波处理后的燃气流量值传递至控制单元内与设定的阈值R1比对，当加热元件的燃气流量值经过最大值后，在下降过程中小于或等于阈值R1时，控制单元发出指令给驱动机构，驱动机构动作直接将玻璃板送出加热炉或延时后将玻璃板送出加热炉，从而完成玻璃板的加热过程。
  15. 根据权利要求14所述的一种玻璃板钢化工艺过程中控制玻璃板出炉的方法，其特征在于：所述的监测单元为燃气流量表。
  16. 根据权利要求14所述的一种玻璃板钢化工艺过程中控制玻璃板出炉的方法，其特征在于：所述的阈值R 1＝R 0·K，其中，K为修正系数，其取值范围为0.95≤K≤1.05，R 0为常温状态下，加热炉空载状态并达到工作温度时加热元件的燃气流量值。
  17. 根据权利要求1、2、4、5、7、8、10、11、13、14或16所述的一种玻璃板钢化工艺过程中控制玻璃板出炉的方法，其特征在于：所述的阈值由人工通过人机界面输入到所述控制单元。
  18. 根据权利要求1、2、5、8、11或14所述的一种玻璃板钢化工艺过程中控制玻璃板出炉的方法，其特征在于：所述的滤波处理为数字滤波处理或模拟滤波处理。
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