CN-122010394-A - Nanometer microcrystalline glass calendaring forming equipment and control method thereof

CN122010394ACN 122010394 ACN122010394 ACN 122010394ACN-122010394-A

Abstract

The invention discloses nanometer glass ceramic calendaring forming equipment and a control method thereof, which relate to the technical field of glass ceramic processing, wherein the endpoint of a maximum allowable continuous operation speed interval is used as a safe operation boundary point in a process regulation strategy, a speed-risk coupling model is constructed, the output is a comprehensive risk evaluation value under the corresponding calendaring speed, in a process control stage from a speed intervention point to the endpoint of the maximum allowable operation interval, for each process control stage, the upper limit value of the calendaring speed allowed in the stage is calculated based on the comprehensive risk evaluation value output in real time in the process control stage, and a speed safety boundary curve dynamically adjusted along with the process is formed. The control method is used for obviously improving the intelligent level of the production process while guaranteeing the molding quality and the equipment reliability of the nano microcrystalline glass through a technical path of 'risk identification-boundary quantization-dynamic regulation'.

Inventors

Zhou Baogong
XUE GUANGPING
DONG LIANGJUN
SONG YONGDE

Assignees

青岛元鼎特种机械制造股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260129

Claims (10)

1. The nanometer microcrystalline glass calendaring control method is characterized by comprising the following steps of: S1, collecting multidimensional operation state data in the nanometer glass ceramics rolling process, analyzing by using a process degradation model, identifying risk indexes which can cause equipment performance degradation or product quality degradation in the current process stage, calculating a maximum allowable continuous operation speed interval of all risk indexes within a safety threshold range, taking the end point of the maximum allowable continuous operation speed interval as a safety operation boundary point in a process regulation strategy, and further defining the end point as a speed intervention point; s2, constructing a speed-risk coupling model, which is used for quantitatively describing the nonlinear association relation between the rolling speed and various process degradation risks, outputting the nonlinear association relation as a comprehensive risk evaluation value under the corresponding rolling speed, and calculating the upper limit value of the rolling speed allowed by each process control stage based on the comprehensive risk evaluation value output in real time in the process control stage from a speed intervention point to the maximum allowable operation interval end point to form a speed safety boundary curve dynamically adjusted along with the process progress; And S3, constructing a process speed regulation strategy which dynamically evolves along with the rolling process based on each process control stage and the rolling speed upper limit value calculated by the process control stage.
2. The method for controlling the calendaring molding of the nano microcrystalline glass according to claim 1, wherein in the step S2, the speed-risk coupling model comprehensively reflects the influence of the calendaring speed elevation on the temperature rising speed of the calendaring roller, the thermal stress distribution and the vibration energy, and the action mechanism of the calendaring speed elevation on the fluidity, the thickness uniformity and the edge molding quality of the glass ribbon.
3. The method for controlling the calendaring molding of nano glass-ceramic according to claim 2, wherein in the step S2, the speed-risk coupling model is a mechanism-driven analytical expression, namely, is realized based on heat conduction, rheology and mechanical vibration theory, and the input parameters comprise the current equipment state, glass physical property parameters and process set values, and are output as comprehensive risk evaluation values at corresponding calendaring speeds.
4. The method for controlling the calendaring molding of nano glass ceramics according to claim 3, wherein the method comprises the following steps: In step S2, a speed-risk coupling model is constructed for quantitatively describing nonlinear association relations between rolling speeds and various process degradation risks, and the nonlinear association relations are output as comprehensive risk evaluation values at corresponding rolling speeds, and the method comprises the following steps: The input parameters of the speed-risk coupling model comprise current equipment state parameters, glass physical parameters and process set values, the input parameters are mapped into comprehensive risk evaluation values, the comprehensive risk evaluation values are multi-dimensional comprehensive indexes of equipment performance degradation risks and product quality degradation risks, and the size of the comprehensive risk evaluation values represents the overall risk level of a process system at the current speed; Dividing the process according to time slices, roll position sections or yield stages in a process control stage from a speed intervention point to a maximum allowable operation interval end point based on the constructed speed-risk coupling model, and calculating an allowable rolling speed upper limit value in real time for each process control stage; Based on the real-time running state data and the glass physical parameters of the current stage, a speed-risk coupling model is input, and the comprehensive risk evaluation value of the stage corresponding to different speeds is output.
5. The method of claim 3, wherein S2 is a process control stage from a speed intervention point to a maximum allowable operation interval end point, wherein for each process control stage, an allowable rolling speed upper limit value is calculated based on a comprehensive risk evaluation value output in real time in the process control stage, and a speed safety boundary curve dynamically adjusted along with the process progress is formed, and the method comprises the following steps: gradually adjusting the speed parameters by taking the safety threshold values of all risk indexes as a reference through reverse constraint logic screening until finding out the corresponding highest speed value under the condition that all risk indexes do not exceed the threshold value, wherein the highest speed value is the upper limit value of the rolling speed allowed in the current process control stage; As the process progresses, the risk characteristics of the different process control stages will dynamically evolve due to equipment heat build-up effects, minor fluctuations in glass composition, or roll surface state transitions, such that the allowable upper limit of calendaring speed will exhibit a progressively decreasing trend.
6. The method for controlling the calendaring molding of nano glass ceramic according to claim 2, wherein S1 is characterized in that risk indexes which can cause the performance degradation of equipment or the quality degradation of products in the current process stage are identified, a maximum allowable continuous operation speed interval of which all the risk indexes are in a safety threshold range is calculated, and the end point of the maximum allowable continuous operation speed interval is used as a safety operation boundary point in a process control strategy and is further defined as a speed intervention point, and the method comprises the following steps: constructing a thermal fatigue accumulation model for equipment thermodynamic degradation risk based on heat conduction and thermal stress theory, calculating the temperature gradient and the thermal cycle times of a roller body part through real-time temperature field data, and evaluating the damage accumulation degree of a microstructure of a material; extracting characteristic frequency energy duty ratio corresponding to typical faults such as bearing wear, gear damage and the like from mechanical vibration degradation risks by utilizing a vibration signal spectrum analysis technology, and judging the abnormality degree of mechanical parts by combining a vibration amplitude time sequence; analyzing the real-time fluctuation trend of thickness consistency standard deviation and surface waviness amplitude by a statistical process control method for the glass forming quality degradation risk, and identifying the risk level of process stability deviating from a threshold value; Identifying risk indicators that lead to reduced equipment performance or degraded product quality during the current process stage, including but not limited to rollers Wen Chaoxian, vibration anomalies, and increased glass defect rates; Based on the identified risk indicators, a maximum allowable continuous running speed interval is calculated in which all risk indicators are always within a safe threshold value range in the current process task cycle or the planned production interval.
7. The method for controlling the calendaring molding of the nanometer microcrystalline glass according to claim 1, wherein in the step S3, a process speed regulation strategy which dynamically evolves along with the calendaring process is constructed, and the logic of the regulation strategy is as follows: From the speed intervention point, the allowable upper limit of the calendering speed is gradually lowered as the process advances, so that at each process control stage, the actual calendering speed does not exceed the safety upper limit allowed for that stage.
8. The method for controlling the calendaring molding of the nanometer glass-ceramic according to claim 1, wherein in the step S1, multidimensional operation state data in the process of calendaring the nanometer glass-ceramic is collected, wherein the multidimensional operation state data relate to equipment performance degradation and process stability, and comprise surface temperature distribution, local temperature difference, thermal deformation, vibration amplitude and frequency spectrum characteristics of a calendaring roller, roller bearing load, driving motor current fluctuation, abnormal signals of a transmission system, thickness consistency of a glass ribbon, surface waviness, edge integrity, flow uniformity, deviation of actual calendaring speed, set pressure and actual pressing force and roll gap control stability.
9. The nanometer glass ceramic calendaring forming device is used for realizing the forming method according to any one of claims 1-8 and is characterized by comprising a device body (1), wherein a circulating liquid cooling calendaring mechanism (2) is arranged on the device body (1), the circulating liquid cooling calendaring mechanism (2) comprises a frame (3), a group of calendaring rollers (4) are arranged at the top of the frame (3), the number of the calendaring rollers (4) is two, the calendaring rollers (4) are rotationally connected with the frame (3) through bearings, a motor (5) is fixedly arranged on one side of the top of the frame (3), and the motor (5) drives the two calendaring rollers (4) to rotate reversely through a speed reducer (6).
10. The nanometer glass ceramic calendaring molding device and the control method thereof according to claim 9, wherein an S-shaped channel is arranged in the calendaring roller (4), a water outlet and a water inlet of the S-shaped channel are arranged on one side far away from the motor (5), a plurality of small impeller generating devices are further arranged in the calendaring roller (4), and the impeller generating devices are electrically connected with a thermometer arranged on the frame (3).

Description

Nanometer microcrystalline glass calendaring forming equipment and control method thereof Technical Field The invention relates to the technical field of glass ceramic processing, in particular to nanometer glass ceramic calendaring molding equipment and a control method thereof. Background In the industrial calendaring process of nanometer microcrystalline glass, in order to pursue production efficiency and productivity scale, higher calendaring speed is generally adopted to improve the output of glass belts in unit time, however, with the increase of calendaring speed, the friction heat between a calendaring roller and the glass belts is increased, so that the surface and internal temperature of the calendaring roller is increased rapidly, meanwhile, the mechanical vibration of equipment is enhanced, the loads of key parts (such as bearings and transmission systems) are increased in a high-speed running state, the performance of the equipment is easy to be degraded gradually, and in addition, the problems of uneven heating, unbalanced stress distribution and the like of the glass in the high-speed running process can also obviously increase the occurrence probability of forming quality defects such as thickness deviation, surface corrugation, edge breakage and the like; For controlling the risks in the current industry, a fixed speed threshold or an empirical speed reduction strategy is often adopted, namely, production is maintained in a preset certain speed range, or the running speed is directly reduced when local anomalies (such as rollers Wen Chaoxian) are detected, but the method has obvious limitations that on one hand, the fixed threshold does not consider the dynamic evolution of equipment states (such as roller body temperature rise accumulation and vibration energy change) and glass characteristics (such as viscosity migration and fluidity response) in the process, so that excessive conservation speed limit (efficiency is sacrificed but actual risk is controllable) or hysteresis regulation (the risk is reduced) is easy to cause, and on the other hand, the empirical strategy lacks systematic association analysis on multidimensional risk indexes (such as roller temperature gradient, vibration spectrum, glass thickness deviation rate and the like), so that comprehensive risks of process degradation at different speeds are difficult to accurately quantify, and multi-objective cooperative optimization of efficiency-quality-equipment life cannot be realized. In view of the above-mentioned needs, for the situation that needs to continuously control the performance degradation of the equipment and the risk of degradation of the product quality in the high-speed casting process, there is a need for a refined control method capable of dynamically sensing the multi-dimensional running state, accurately quantifying the nonlinear association of the speed and the risk, and adaptively adjusting the casting speed according to the above-mentioned relation. Therefore, the dynamic adaptation of the safety boundary of the rolling speed is realized through real-time monitoring, risk modeling and dynamic regulation, and the method becomes a technical problem to be solved in the field. Disclosure of Invention The invention aims to provide nanometer microcrystalline glass calendaring molding equipment and a control method thereof, which are used for solving the problem of the deficiency in the background technology. In order to achieve the purpose, the invention provides the following technical scheme that the nanometer microcrystalline glass calendaring molding control method comprises the following steps: S1, collecting multidimensional operation state data in the nanometer glass ceramics rolling process, analyzing by using a process degradation model, identifying risk indexes which can cause equipment performance degradation or product quality degradation in the current process stage, calculating a maximum allowable continuous operation speed interval of all risk indexes within a safety threshold range, taking the end point of the maximum allowable continuous operation speed interval as a safety operation boundary point in a process regulation strategy, and further defining the end point as a speed intervention point; s2, constructing a speed-risk coupling model, which is used for quantitatively describing the nonlinear association relation between the rolling speed and various process degradation risks, outputting the nonlinear association relation as a comprehensive risk evaluation value under the corresponding rolling speed, and calculating the upper limit value of the rolling speed allowed by each process control stage based on the comprehensive risk evaluation value output in real time in the process control stage from a speed intervention point to the maximum allowable operation interval end point to form a speed safety boundary curve dynamically adjusted along with the process progress; And S3, constructing