CN116589176A - Mandrel bow curvature calibration system and method - Google Patents
Mandrel bow curvature calibration system and method Download PDFInfo
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- CN116589176A CN116589176A CN202310236296.6A CN202310236296A CN116589176A CN 116589176 A CN116589176 A CN 116589176A CN 202310236296 A CN202310236296 A CN 202310236296A CN 116589176 A CN116589176 A CN 116589176A
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- 238000000034 method Methods 0.000 title claims abstract description 145
- 238000009826 distribution Methods 0.000 claims abstract description 52
- 238000005520 cutting process Methods 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims description 104
- 238000003860 storage Methods 0.000 claims description 26
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- 230000036760 body temperature Effects 0.000 claims description 13
- 230000002159 abnormal effect Effects 0.000 claims description 12
- 239000007921 spray Substances 0.000 claims description 10
- 238000012797 qualification Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 30
- 238000004458 analytical method Methods 0.000 description 6
- 230000006872 improvement Effects 0.000 description 6
- 239000013307 optical fiber Substances 0.000 description 5
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- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
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- 239000011521 glass Substances 0.000 description 3
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- 238000004886 process control Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/01466—Means for changing or stabilising the diameter or form of tubes or rods
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/01446—Thermal after-treatment of preforms, e.g. dehydrating, consolidating, sintering
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Abstract
The application relates to a system and a method for calibrating the bow degree of a mandrel, comprising a rod calibrating device, an intelligent robot and central control equipment, wherein the rod calibrating device comprises a rod calibrating lathe, a blast lamp movably arranged on the rod calibrating lathe and a rod calibrating bracket; the central control equipment is connected with the intelligent robot, the blast lamp and the rod correcting support and is used for: determining a cutting position on the mother rod according to the selected, input or received outer diameter and length of the mother rod which is finished to be extended and the requirement of the next working procedure; controlling an intelligent robot to cut a core rod from a mother rod, measuring the length, the outer diameter and the bow degree of the core rod to form a bow degree distribution curve in the length direction of the core rod, marking the position of an over-standard point and the over-standard value, and transferring the core rod to a rod calibrating device; the control rod calibrating device is used for carrying out straightening treatment on the super standard point, the application can automatically calibrate the core rod with the bow degree not reaching the standard, eliminates the influence of human factors on the working procedure and improves the production efficiency.
Description
Technical Field
The application relates to the technical field of preparation of optical fiber preforms, in particular to a core rod bow curvature calibration system and method.
Background
In the manufacturing process of the optical fiber preform, extension and alignment are necessary before the mother rod stream generated in the VAD process is transferred to the OVD process for use.
The existing common method for straightening the extended core rod usually uses a graduated scale or a dial indicator to observe and measure, and then manually straightens the core rod by manpower, however, the method is difficult to eliminate the influence of human factors on the working procedure, meanwhile, the production efficiency is lower due to the human factors, the whole length cannot be straightened, and the technical problem that the core package concentricity of the subsequent optical fiber preform rod is scrapped due to the fact that the bow degree of the core rod is larger cannot be fundamentally solved.
Disclosure of Invention
The embodiment of the application provides a system and a method for calibrating the bow degree of a core rod, which can automatically calibrate the core rod with the bow degree not reaching the standard, eliminate the influence of human factors on the working procedure and improve the production efficiency.
In a first aspect, a mandrel bow calibration system is provided, comprising:
the rod calibrating device comprises a rod calibrating lathe, a blast lamp movably arranged on the rod calibrating lathe and a rod calibrating bracket;
an intelligent robot;
and the central control equipment is connected with the intelligent robot, the blast lamp and the bar correcting bracket and is used for: determining a cutting position on the mother rod according to the selected, input or received outer diameter and length of the mother rod which is finished to be extended and the requirement of the next working procedure; controlling the intelligent robot to cut a core rod from the master rod, measuring the length, the outer diameter and the bow degree of the core rod to form a bow degree distribution curve in the length direction of the core rod, marking an over-standard point position and an over-standard value, and transferring the core rod to the rod calibrating device; and controlling the bar calibrating device to straighten the super standard point.
In some embodiments, the system further comprises a storage unit;
the central control device is also connected with the storage unit and is used for: storing the length and the outer diameter of the core rod before straightening, the bow curve degree distribution curve before straightening and after straightening, and the rod calibrating process parameters of the rod calibrating device during each working to the storage unit, wherein the rod calibrating process parameters comprise oxyhydrogen flame flow of a spray lamp, burning time, the position of the spray lamp, the height of a rod calibrating bracket and the position of the rod calibrating bracket;
the central control device is further configured to:
invoking historical data of the storage unit for a period of time, and analyzing bow degree distribution curves of the core rod before and after straightening in the historical data to obtain bow degree change conditions;
and adjusting the rod calibrating process parameters of the rod calibrating device based on the length, the outer diameter and the bow degree change condition before the straightening of the core rod in the historical data.
In some embodiments, the system further comprises a storage unit;
the central control device is also connected with the storage unit and the extension tower and is used for:
forming a bow distribution curve of the mother rod which is completed to extend based on the bow distribution curve before the core rod is straightened;
storing the bow curve of the mother rod after the extension and the extension process parameters of each start of the extension tower into the storage unit, wherein the extension process parameters comprise extension speed, oxyhydrogen gas flow and furnace body temperature;
the central control device is further configured to:
invoking historical data of the storage unit within a period of time, and analyzing a bow degree distribution curve of the mother rod which is completed to extend in the historical data to obtain a bow degree change condition;
based on the bow degree change condition, the extension process parameters in the historical data are analyzed, and the abnormal condition is found out and corrected.
In some embodiments, the central control apparatus is further configured to: when the bar calibrating device straightens all the exceeding points, the intelligent robot is controlled to take down the core rod from the bar calibrating device, the bow degree of the core rod is measured again to confirm qualification, if disqualification, the exceeding point position and the exceeding value are marked, and the core rod is sent to the bar calibrating device again.
In some embodiments, the central control apparatus is further configured to: when the qualified core rod is confirmed after the core rod is straightened for many times, combining the rod correcting process parameters of the rod correcting device during many times of work to obtain updated rod correcting process parameters;
the bar calibrating process parameters comprise oxyhydrogen flame flow of a blast burner, burning time, position of the blast burner, height of a bar calibrating bracket and position of the bar calibrating bracket.
In a second aspect, a method for calibrating bow of a mandrel is provided, comprising the steps of:
determining a cutting position on the mother rod according to the outer diameter and the length of the mother rod which are finished to extend and the requirement of the next working procedure;
cutting a core rod from the mother rod, measuring the length, the outer diameter and the bow degree of the core rod to form a bow degree distribution curve in the length direction of the core rod, and marking out the position of the super-standard point and the super-standard value;
and straightening the exceeding point.
In some embodiments, the method further comprises adjusting the rod calibration process parameter, and the adjusting the rod calibration process parameter specifically comprises:
retrieving historical data for a period of time, the historical data comprising: the length and the outer diameter of the core rod before straightening, the bow curve degree distribution curve before and after straightening and the rod correcting technological parameters of the rod correcting device during each working, wherein the rod correcting technological parameters comprise oxyhydrogen flame flow of a spray lamp, burning time, the position of the spray lamp, the height of a rod correcting support and the position of the rod correcting support;
analyzing bow degree distribution curves of the core rod before and after straightening in the historical data to obtain bow degree change conditions;
and adjusting the rod calibrating process parameters of the rod calibrating device based on the length, the outer diameter and the bow degree change condition before the straightening of the core rod in the historical data.
In some embodiments, the method further includes adjusting an extension process parameter, and adjusting the extension process parameter specifically includes:
retrieving historical data over a period of time, the historical data comprising: the bow distribution curve of the mother rod after the extension is completed, and the extension process parameters of each start of the extension tower, wherein the extension process parameters comprise extension speed, oxyhydrogen gas flow and furnace body temperature;
analyzing the bow degree distribution curve of the mother rod which is completed to extend in the historical data to obtain the bow degree change condition;
based on the bow degree change condition, the extension process parameters in the historical data are analyzed, and the abnormal condition is found out and corrected.
In some embodiments, after the straightening treatment is performed on the exceeding point, the method further includes the following steps:
measuring the bow degree of the core rod again to confirm the qualification;
if the standard deviation is not qualified, marking the position and the superscript value of the superscript point, and straightening the superscript point again.
In some embodiments, the rod calibration process parameters in the multiple straightening processes are combined to obtain updated rod calibration process parameters;
the bar calibrating process parameters comprise oxyhydrogen flame flow of a blast burner, burning time, position of the blast burner, height of a bar calibrating bracket and position of the bar calibrating bracket.
The technical scheme provided by the application has the beneficial effects that:
the embodiment of the application provides a system and a method for calibrating the bow degree of a core rod, which are characterized in that the whole process of control is performed by central control equipment, so that the interference of human factors on the product quality is eliminated, the core rod is precisely aligned, the processing efficiency is improved, and the hidden danger of rejection of the concentricity of a core bag of a subsequent optical fiber preform rod due to the fact that the bow degree of the core rod exceeds the standard is solved.
Meanwhile, the application utilizes the concept of big data analysis, can continuously improve the technological level of equipment through accumulation and feedback of data, achieves the aim of improving the bow degree of the core rod by improving the extension technological parameters of the extension tower, and can calibrate the bow degree of the core rod more efficiently and accurately by improving the rod calibrating technological parameters of the rod calibrating device.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a block diagram of a mandrel bow calibration system provided by an embodiment of the present application;
FIG. 2 is a graph showing the bow curvature distribution of a plurality of produced mandrels at the same process parameters over a period of time provided by an embodiment of the present application;
FIG. 3 is a schematic diagram showing the flow rate of oxyhydrogen gas according to the embodiment of the present application over time;
FIG. 4 is a graph showing a predicted bow value and an actual bow value according to an embodiment of the present application;
FIG. 5 is a graph showing the bow distribution of a core rod produced in a first line provided by an embodiment of the present application;
FIG. 6 is a curve showing the bow distribution of the produced mandrel in the same time period in the third production line according to the embodiment of the present application;
FIG. 7 is a graph showing a distribution of bow curvature of a plurality of product core bars provided by an embodiment of the present application;
FIG. 8 is a box plot of a plurality of product core rod arches provided by an embodiment of the present application;
FIG. 9 is a graph showing the bow profile of a mandrel provided in an embodiment of the present application;
FIG. 10 is a graph showing an extension velocity profile according to an embodiment of the present application;
FIG. 11 is a graph showing a temperature distribution curve of a furnace body according to an embodiment of the present application;
FIG. 12 is a flow distribution of oxyhydrogen flame according to an embodiment of the present application.
In the figure: 1. a central control device; 2. a rod calibrating device; 20. rod calibrating lathe; 21. a torch; 22. a rod correcting bracket; 3. an intelligent robot; 30. an X-axis calliper; 31. a Y-axis calliper; 32. a storage barrel; 33. a mechanical arm; 4. and (5) extending the tower.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Referring to fig. 1, an embodiment of the present application provides a mandrel bow calibration system, which includes a rod calibration device, an intelligent robot, and a central control device, where the rod calibration device includes a rod calibration lathe, a torch movably disposed on the rod calibration lathe, and a rod calibration support, and the central control device is connected with the intelligent robot, the torch, and the rod calibration support and is used for: determining a cutting position on the mother rod according to the selected, input or received outer diameter and length of the mother rod which is finished to be extended and the requirement of the next working procedure; controlling an intelligent robot to cut a core rod from a mother rod, measuring the length, the outer diameter and the bow degree of the core rod to form a bow degree distribution curve in the length direction of the core rod, marking the position of an over-standard point and the over-standard value, and transferring the core rod to a rod calibrating device; and controlling the bar calibrating device to straighten the super standard point.
According to the system provided by the embodiment of the application, the central control equipment determines the cutting position on the mother rod according to the outer diameter and the length of the mother rod which are finished to extend and the requirement of the next working procedure, then the intelligent robot is used for cutting, the length, the outer diameter and the bow degree of the core rod are measured, so that a bow degree distribution curve in the length direction of the core rod is formed, the bow degree distribution curve is compared with a bow degree threshold value, whether the standard is exceeded or not can be obtained, if the standard is exceeded, the position of an exceeding standard point and the exceeding standard value are marked, and finally the standard value is sent to the rod calibrating device, and the straightening treatment of each exceeding standard point is realized by controlling a blast lamp and a rod calibrating bracket of the rod calibrating device. Because the central control equipment is adopted for whole-process control, the interference of human factors on the product quality is eliminated, the core rod is accurately straightened, the processing efficiency is improved, and the hidden danger that the core bag concentricity of the subsequent optical fiber preform is scrapped due to the fact that the bow degree of the core rod exceeds the standard is solved.
Referring to fig. 1, the rod calibrating device comprises a rod calibrating lathe, a blast lamp and a rod calibrating support, wherein the blast lamp and the rod calibrating support can move on the rod calibrating lathe, the oxyhydrogen flame flow, the burning time and the blast lamp position of the blast lamp can be controlled by using central control equipment, the height of the rod calibrating support and the position of the rod calibrating support can be controlled, the exceeding point is burnt and softened by using the blast lamp, and the height of the rod calibrating support is adjusted to realize the adjustment of the bow degree of the exceeding point.
Referring to fig. 1, the intelligent robot includes a movable X-axis calliper and a movable Y-axis calliper, so as to measure a mandrel, the mechanical arm can cut a mother rod and clamp the mandrel, and in the transferring process, the mechanical arm can put the mandrel into a storage barrel.
The requirement of the next process is specifically determined by actual production, for example, the length of the mandrel required by the next process is 1500mm, the outer diameter is required to be 40mm plus or minus 0.5mm, then the region with the qualified outer diameter is found from one end of the mother rod which is finished to extend, and the length of 1500mm is cut off.
The central control device can obtain the outer diameter and the length of the mother rod which are finished to extend and the requirement of the next working procedure in various modes.
For example, the central control device has a display screen, on which mother sticks of various common specifications and the next process requirement can be displayed, and the user only needs to select.
For another example, the central control device has a display screen, and the display screen has an input box, so that the user only needs to input the outer diameter and the length of the mother rod which have been extended and the next process requirement in the input box.
For another example, the central control device is connected to an extension tower and an OVD device, the extension tower sends the outer diameter and length of the mother rod after extension to the central control device, the OVD device sends the next process requirement to the central control device, and the central control device only needs to receive the data.
For the mother rods with the same specification, the position of the bow degree exceeding the standard point and the exceeding standard value of the core rod obtained by extending the extension tower under the same condition are usually fixed, so that the technological parameters of the rod calibration when the rod calibration device is calibrated to be qualified can be determined in advance.
After one straightening, the bow of the mandrel should generally be acceptable, but for greater safety, in some preferred embodiments the central control device is also configured to: when the bar calibrating device straightens all the exceeding points, the intelligent robot is controlled to take down the core rod from the bar calibrating device, the bow degree of the core rod is measured again to confirm qualification, if disqualification, the exceeding point position and the exceeding value are marked, and the core rod is sent to the bar calibrating device again to straighten again.
When the mandrel is qualified after multiple alignments, which is an issue with the current alignment process parameters, the subsequent mandrel may be qualified after multiple alignments, and in order to improve efficiency, in some preferred embodiments, the central control device is further configured to: when the qualified core rod is confirmed after the core rod is subjected to multiple straightening, combining the rod correcting process parameters of the rod correcting device during multiple working to obtain updated rod correcting process parameters, so that the updated rod correcting process parameters of the next core rod during the straightening can be qualified after one-time straightening; the rod calibrating process parameters comprise oxyhydrogen flame flow of a blast burner, burning time, position of the blast burner, height of a rod calibrating bracket and position of the rod calibrating bracket.
For example, each time the firing time is different from one another, the other parameters are the same, and the firing time is added during the merging process, and then the other parameters remain unchanged as the firing time of the updated calibration process parameters.
In the process of straightening the core rod by using the rod straightening device, a large amount of data is generated, and is not utilized, so that in order to fully utilize the large data to guide the rod straightening process, the process improvement is performed, the effect and the efficiency of straightening the core rod are improved, and in some preferred embodiments, the system further comprises a storage unit; the central control device is also connected to the storage unit and is configured to:
storing the length and the outer diameter of the core rod before straightening, the bow curve degree distribution curve before straightening and after straightening, and the rod calibrating process parameters of the rod calibrating device during each working to a storage unit, wherein the rod calibrating process parameters comprise oxyhydrogen flame flow of a spray lamp, burning time, the position of the spray lamp, the height of a rod calibrating bracket and the position of the rod calibrating bracket;
the central control device is also for:
invoking historical data in a period of time of a storage unit, and analyzing bow degree distribution curves before and after straightening of a mandrel in the historical data to obtain bow degree change conditions;
based on the length and the outer diameter before the mandrel straightening and the bow degree change condition in the historical data, the rod correcting process parameters of the rod correcting device are adjusted.
For example, as an example, the central control device analyzes the history data of the last several months, finds that the change amplitude of bow curve of the near two-week mandrel is reduced by 0.2 before and after the straightening compared with the previous month, further analyzes the outer diameter of the near two-week mandrel before the straightening, finds that the average outer diameter of the near two-week mandrel is reduced by 2mm compared with the previous month, and feeds back to the engineer that the height of the mandrel holder is unchanged compared with the previous month, and finds that the mandrel holder is not fully contacted with the mandrel during the mandrel straightening process, so that the bow curve is not effectively calibrated. And according to the situation, the corresponding relation between the height of the rod correcting bracket and the outer diameter of the core rod is adjusted, and the subsequent bow degree of the core rod is effectively controlled.
Therefore, the preferred embodiment utilizes the idea of big data analysis, can continuously improve the technological level of equipment through accumulation and feedback of data, and can calibrate the bow degree of the core rod more efficiently and accurately through improving the rod calibrating technological parameters of the rod calibrating device.
In the process of extending a mother rod by using the extension tower, a large amount of data is generated, the data is not utilized generally, and in the process of extending the mother rod, the bow degree of the mother rod is influenced by the abnormal extension process parameters of the extension tower, so that the bow degree of the core rod is influenced finally, and in order to fully utilize the large data to guide the extension process, process improvement is performed, the yield of the core rod which is directly qualified after extension is improved, and in some preferred embodiments, the system further comprises a storage unit; the central control device is also connected with the storage unit and the extension tower and is used for:
forming a bow distribution curve of the mother rod which is completed to extend based on the bow distribution curve before the core rod is straightened;
storing the bow distribution curve of the mother rod after the extension and the extension process parameters of each start of the extension tower into a storage unit, wherein the extension process parameters comprise extension speed, oxyhydrogen gas flow and furnace body temperature;
the central control device is also for:
invoking historical data in a period of time of a storage unit, and analyzing a bow degree distribution curve of the mother rod which is completed to extend in the historical data to obtain a bow degree change condition;
based on the bow change, the extension process parameters in the historical data are analyzed to find out abnormal conditions and correct the abnormal conditions.
For example, the central control device may be used to feed back the bow profile of the mandrel under the current extension process parameter to the engineer in combination with the historical data during a period of time, as shown in fig. 2, where the bow profile of the mandrel produced by a plurality of the same extension process parameter during a period of time is shown, the abscissa is the position coordinate of the measurement point on the mandrel, the ordinate is the bow, and it is known that the bow of the mandrel generally increases from left to right.
Continuing the analysis, it was found that the flow rate of oxyhydrogen gas fluctuates during the extension process, and as shown in fig. 3, the fluctuation of the flow rate of oxyhydrogen gas gradually increases with the lapse of production time, and the abscissa is the production time, and the ordinate is the flow rate of oxyhydrogen gas.
Therefore, the fluctuation of the flow of the oxyhydrogen gas can influence the heating degree of the core rod, thereby influencing the extension precision of the core rod. Further, correlation analysis is performed on the flow fluctuation of oxyhydrogen gas and the bow degree of the core rod, from the correlation analysis, according to a regression model, a scatter diagram between the actual value +0.1 of the bow degree of the core rod and a predicted value is shown in fig. 4, fig. 4 is a fitting diagram of the actual value and the predicted value, the abscissa is a position coordinate of a measuring point on the core rod, and the ordinate is the bow degree, and as can be seen from fig. 4, the distribution trend of the actual value and the predicted value of 6 samples is approximately the same, wherein the distribution range of the two samples is concentrated, and the fluctuation range of the predicted value is smaller and is between 0.075. The three sample predictors are more scattered.
| Sample numbering | Mean Square Error (MSE) | Mean Absolute Error (MAE) | R square | Regression index term |
| 1 | 6.93E-05 | 0.006646576 | 0.547836 | 78 |
| 2 | 1.23E-05 | 0.002804283 | 0.874289 | 74 |
| 3 | 1.53E-05 | 0.003114565 | 0.94199 | 74 |
| 4 | 4.70E-05 | 0.005261137 | 0.893261 | 75 |
| 5 | 4.21E-05 | 0.0046075 | 0.929895 | 78 |
| 6 | 2.61E-05 | 0.004058855 | 0.823351 | 74 |
The mean square error of 6 samples in the analysis is smaller, the MSE value is smaller, and the prediction model description experimental data has very good accuracy.
And (3) the engineer decides to calibrate the MFC (mass flow controerl flowmeter) precision of the extension tower according to the analysis result of the big data, controls flow fluctuation, and finally verifies that improvement is effective.
As another example, the central control device may feed back to the engineer the product bow profile of the extension process in combination with historical data over a period of time.
Referring to fig. 5 and 6, according to the trend chart of the historical data, the bow degree distribution of the first production line and the third production line has opposite trend.
Referring to fig. 5, a curve of the bow degree of the core rod is produced in a certain period of time in the first production line, the abscissa is the position of the measuring point on the core rod, the ordinate is the bow degree, and for the first production line, the bow degree of the core rod increases with the increase of the extension length.
Referring to fig. 6, the curve of the bow degree of the core rod produced by the production line No. three in the same period of time is marked by the position of the measuring point on the core rod, the curve of the bow degree is marked by the ordinate, and the curve of the core rod is decreased along with the increase of the extension length for the production line No. three.
Referring to fig. 7 and 8, the extension length of the multiple lines is compared to the bow mean. Wherein fig. 7 is a graph showing the bow curves of a plurality of production core rods, the abscissa represents the position coordinates of the measuring points on the core rods, the ordinate is the bow curve, fig. 8 is a box graph showing the bow curves of a plurality of production core rods, the abscissa is different production lines, and the ordinate is the average value of the bow curves of all the core rods of the production lines.
According to the analysis, an engineer is reminded to analyze the equipment difference between the first production line and the third production line to find out the root of the problem.
For another example, the central control apparatus combines historical data in a period of time, and feeds back to the engineer that the bow degrees of 6 recently produced products at 300 positions are generally larger, as shown in fig. 9, and is a bow degree distribution curve of a produced mandrel in a certain production line in the same period of time, where the abscissa is a position mark of a measurement point on the mandrel, and the ordinate is the bow degree.
Meanwhile, the central control device calls up the curves of the extension speed, the furnace body temperature, the oxyhydrogen gas flow rate and the like in the recent production process, and observes abnormal conditions, as shown in fig. 10, 11 and 12, wherein fig. 10 is the extension speed distribution curve in each start-up production process when a certain production line is used for producing a core rod in the same period, the abscissa is the production time, the ordinate is the extension speed, fig. 11 is the furnace body temperature distribution curve in each start-up production process when a certain production line is used for producing the core rod in the same period, the abscissa is the production time, the ordinate is the furnace body temperature, fig. 12 is the oxyhydrogen flame flow distribution curve in each start-up production process when a certain production line is used for producing the core rod in the same period, and the abscissa is the oxyhydrogen flame flow rate.
Fitting analysis was performed on the curves of the relevant parameters, first excluding the effect of the gas flow, since the gas flow of 6 samples did not have any fluctuations.
Secondly, the influence of the furnace body temperature on the bow degree is researched, the furnace body temperature change curves of 6 samples are the same, the equipment state is not abnormal, the corresponding furnace body temperature at the 300mm position is relatively high and possibly an important factor for influencing the bow degree, but the bow degree of the rear section of the 6 samples is greatly different, the furnace body temperature is not different, the fitting performance is poor, and therefore, the prediction fit of the furnace body temperature on the bow degree influence is inaccurate.
Finally, the influence of the extension speed on the bow degree is studied, and the extension speed at the position of 300mm from the extension start is generally higher in order to obtain higher glass utilization rate due to the process characteristics of the extension process, so that the glass is heated in a heating furnace for relatively short time, is less influenced by equipment and is easier to maintain the original state, and in theory, the bow degree is possibly larger.
Fitting analysis is carried out on the extension speed distribution and the bow degree distribution to obtain the following table:
| sample numbering | Mean Square Error (MSE) | Mean Absolute Error (MAE) | R square | Regression index term |
| 1 | 0.0000125 | 0.002386952 | 0.825401 | 62 |
| 2 | 0.0000321 | 0.001045089 | 0.910042 | 65 |
| 3 | 0.0000148 | 0.002056912 | 0.930241 | 65 |
| 4 | 0.0000356 | 0.004025041 | 0.854619 | 63 |
| 5 | 0.0000274 | 0.003105061 | 0.876356 | 67 |
| 6 | 0.0000213 | 0.001056081 | 0.890742 | 62 |
From the above table, it is known that the fitting accuracy is good, the starting extension speed is high, which is a main influencing factor causing the bow degree to be large, and the engineer makes an improvement assumption according to the data and the generation reason in combination: the temperature of the head raising furnace body is increased, so that the glass is fully heated, and the head raising bow degree is improved.
The embodiment of the application also provides a method for calibrating the bow degree of the mandrel, which comprises the following steps:
101: determining a cutting position on the mother rod according to the outer diameter and the length of the mother rod which are finished to extend and the requirement of the next working procedure;
specifically, the central control device can determine the cutting position on the mother rod according to the selected, inputted or received outer diameter and length of the mother rod which is completed to extend and the requirement of the next working procedure.
For example, the central control device has a display screen, on which mother sticks of various common specifications and the next process requirement can be displayed, and the user only needs to select.
For another example, the central control device has a display screen, and the display screen has an input box, so that the user only needs to input the outer diameter and the length of the mother rod which have been extended and the next process requirement in the input box.
For another example, the central control device is connected to an extension tower and an OVD device, the extension tower sends the outer diameter and length of the mother rod after extension to the central control device, the OVD device sends the next process requirement to the central control device, and the central control device only needs to receive the data.
102: cutting a core rod from a mother rod, measuring the length, the outer diameter and the bow degree of the core rod to form a bow degree distribution curve in the length direction of the core rod, and marking the position of the superscript point and the superscript value;
specifically, the central control device controls the intelligent robot to execute cutting and measuring work, forms a bow curve in the length direction of the core rod by using measured data, marks the position of the super-standard point and the super-standard value, and then transfers the core rod to the rod calibrating device through the intelligent robot.
103: the central control equipment controls the work of the blast lamp and the rod calibrating bracket of the rod calibrating device so as to straighten the exceeding point.
104: then measuring the bow degree of the core rod again to confirm the qualification; if the standard deviation is not qualified, marking the position and the exceeding standard value of the exceeding standard point, and straightening the exceeding standard point again until the standard deviation is qualified. Combining the rod calibration process parameters in the multiple straightening processes to obtain updated rod calibration process parameters for subsequent mandrel straightening; the rod calibrating process parameters comprise oxyhydrogen flame flow of a blast burner, burning time, position of the blast burner, height of a rod calibrating bracket and position of the rod calibrating bracket.
In the process of straightening the mandrel by using the rod straightening device, a large amount of data is generated, and is not utilized, so in order to fully utilize the large data to guide the rod straightening process, process improvement is performed, and the effect and efficiency of straightening the mandrel are improved, in some preferred embodiments, the method further comprises adjusting rod straightening process parameters, and adjusting the rod straightening process parameters, and specifically comprises:
201: retrieving historical data for a period of time, the historical data comprising: the length and the outer diameter of the core rod before straightening, the bow curve degree distribution curve before straightening and after straightening, and the rod calibrating process parameters of the rod calibrating device during each working, wherein the rod calibrating process parameters comprise oxyhydrogen flame flow of a blast burner, burning time, the position of the blast burner, the height of a rod calibrating bracket and the position of the rod calibrating bracket.
202: and analyzing bow degree distribution curves before and after straightening of the core rod in the historical data to obtain bow degree change conditions.
203: based on the length and the outer diameter before the mandrel straightening and the bow degree change condition in the historical data, the rod correcting process parameters of the rod correcting device are adjusted.
According to the embodiment, the thought of big data analysis is utilized, the technological level of equipment can be continuously improved through accumulation and feedback of data, and the bow degree of the mandrel can be calibrated more efficiently and accurately through improving the rod calibrating technological parameters of the rod calibrating device.
In the process of extending a mother rod by using an extension tower, a large amount of data is generated, the data is not utilized, and in the process of extending the mother rod, the bow degree of the mother rod is influenced by the abnormal extension process parameters of the extension tower, so that in order to fully utilize the large data to guide the extension procedure, perform process improvement and improve the yield of the directly qualified extended mother rod, in some preferred embodiments, the method further comprises adjusting the extension process parameters, and specifically comprises:
301: retrieving historical data over a period of time, the historical data comprising: the bow distribution curve of the mother rod after the extension is completed, and the extension process parameters of each start of the extension tower, wherein the extension process parameters comprise extension speed, oxyhydrogen gas flow and furnace body temperature.
302: and analyzing the bow distribution curve of the mother rod which is completed to extend in the historical data to obtain the bow change condition.
303: based on the bow change, the extension process parameters in the historical data are analyzed to find out abnormal conditions and correct the abnormal conditions.
According to the embodiment, the thought of big data analysis is utilized, the technological level of equipment can be continuously improved through data accumulation and feedback, and the purpose of improving the bow degree of the core rod is achieved through improving the extending technological parameters of the extending tower, so that the bow degree of the extended core rod can be directly qualified.
In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present application and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
It should be noted that in the present application, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is only a specific embodiment of the application to enable those skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A mandrel bow calibration system, comprising:
the rod calibrating device comprises a rod calibrating lathe, a blast lamp movably arranged on the rod calibrating lathe and a rod calibrating bracket;
an intelligent robot;
and the central control equipment is connected with the intelligent robot, the blast lamp and the bar correcting bracket and is used for: determining a cutting position on the mother rod according to the selected, input or received outer diameter and length of the mother rod which is finished to be extended and the requirement of the next working procedure; controlling the intelligent robot to cut a core rod from the master rod, measuring the length, the outer diameter and the bow degree of the core rod to form a bow degree distribution curve in the length direction of the core rod, marking an over-standard point position and an over-standard value, and transferring the core rod to the rod calibrating device; and controlling the bar calibrating device to straighten the super standard point.
2. The mandrel bow calibration system of claim 1, wherein:
the system further comprises a storage unit;
the central control device is also connected with the storage unit and is used for: storing the length and the outer diameter of the core rod before straightening, the bow curve degree distribution curve before straightening and after straightening, and the rod calibrating process parameters of the rod calibrating device during each working to the storage unit, wherein the rod calibrating process parameters comprise oxyhydrogen flame flow of a spray lamp, burning time, the position of the spray lamp, the height of a rod calibrating bracket and the position of the rod calibrating bracket;
the central control device is further configured to:
invoking historical data of the storage unit for a period of time, and analyzing bow degree distribution curves of the core rod before and after straightening in the historical data to obtain bow degree change conditions;
and adjusting the rod calibrating process parameters of the rod calibrating device based on the length, the outer diameter and the bow degree change condition before the straightening of the core rod in the historical data.
3. The mandrel bow calibration system of claim 1, wherein:
the system further comprises a storage unit;
the central control device is also connected with the storage unit and the extension tower and is used for:
forming a bow distribution curve of the mother rod which is completed to extend based on the bow distribution curve before the core rod is straightened;
storing the bow curve of the mother rod after the extension and the extension process parameters of each start of the extension tower into the storage unit, wherein the extension process parameters comprise extension speed, oxyhydrogen gas flow and furnace body temperature;
the central control device is further configured to:
invoking historical data of the storage unit within a period of time, and analyzing a bow degree distribution curve of the mother rod which is completed to extend in the historical data to obtain a bow degree change condition;
based on the bow degree change condition, the extension process parameters in the historical data are analyzed, and the abnormal condition is found out and corrected.
4. The mandrel bow calibration system of claim 1, wherein:
the central control device is further configured to: when the bar calibrating device straightens all the exceeding points, the intelligent robot is controlled to take down the core rod from the bar calibrating device, the bow degree of the core rod is measured again to confirm qualification, if disqualification, the exceeding point position and the exceeding value are marked, and the core rod is sent to the bar calibrating device again.
5. The mandrel bow calibration system according to claim 4, wherein:
the central control device is further configured to: when the qualified core rod is confirmed after the core rod is straightened for many times, combining the rod correcting process parameters of the rod correcting device during many times of work to obtain updated rod correcting process parameters;
the bar calibrating process parameters comprise oxyhydrogen flame flow of a blast burner, burning time, position of the blast burner, height of a bar calibrating bracket and position of the bar calibrating bracket.
6. The method for calibrating the bow degree of the mandrel is characterized by comprising the following steps of:
determining a cutting position on the mother rod according to the outer diameter and the length of the mother rod which are finished to extend and the requirement of the next working procedure;
cutting a core rod from the mother rod, measuring the length, the outer diameter and the bow degree of the core rod to form a bow degree distribution curve in the length direction of the core rod, and marking out the position of the super-standard point and the super-standard value;
and straightening the exceeding point.
7. The method of calibrating a bow of a mandrel of claim 6, wherein:
the method also comprises the steps of adjusting the technological parameters of the bar correction, and the method specifically comprises the following steps:
retrieving historical data for a period of time, the historical data comprising: the length and the outer diameter of the core rod before straightening, the bow curve degree distribution curve before and after straightening and the rod correcting technological parameters of the rod correcting device during each working, wherein the rod correcting technological parameters comprise oxyhydrogen flame flow of a spray lamp, burning time, the position of the spray lamp, the height of a rod correcting support and the position of the rod correcting support;
analyzing bow degree distribution curves of the core rod before and after straightening in the historical data to obtain bow degree change conditions;
and adjusting the rod calibrating process parameters of the rod calibrating device based on the length, the outer diameter and the bow degree change condition before the straightening of the core rod in the historical data.
8. The method of calibrating a bow of a mandrel of claim 6, wherein:
the method also comprises the steps of adjusting the extension process parameters, and the extension process parameters are adjusted, and specifically comprise the following steps:
retrieving historical data over a period of time, the historical data comprising: the bow distribution curve of the mother rod after the extension is completed, and the extension process parameters of each start of the extension tower, wherein the extension process parameters comprise extension speed, oxyhydrogen gas flow and furnace body temperature;
analyzing the bow degree distribution curve of the mother rod which is completed to extend in the historical data to obtain the bow degree change condition;
based on the bow degree change condition, the extension process parameters in the historical data are analyzed, and the abnormal condition is found out and corrected.
9. The method of calibrating a bow of a mandrel of claim 6, wherein:
after straightening the exceeding point, the method further comprises the following steps:
measuring the bow degree of the core rod again to confirm the qualification;
if the standard deviation is not qualified, marking the position and the superscript value of the superscript point, and straightening the superscript point again.
10. The method for calibrating the bow curvature of a mandrel as recited in claim 9, wherein:
combining the rod calibrating process parameters in the multiple straightening processes to obtain updated rod calibrating process parameters;
the bar calibrating process parameters comprise oxyhydrogen flame flow of a blast burner, burning time, position of the blast burner, height of a bar calibrating bracket and position of the bar calibrating bracket.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310236296.6A CN116589176A (en) | 2023-03-13 | 2023-03-13 | Mandrel bow curvature calibration system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310236296.6A CN116589176A (en) | 2023-03-13 | 2023-03-13 | Mandrel bow curvature calibration system and method |
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| CN116589176A true CN116589176A (en) | 2023-08-15 |
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| CN202310236296.6A Pending CN116589176A (en) | 2023-03-13 | 2023-03-13 | Mandrel bow curvature calibration system and method |
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| CN (1) | CN116589176A (en) |
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- 2023-03-13 CN CN202310236296.6A patent/CN116589176A/en active Pending
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