Method for controlling glass production based on parameters measured by using expansion coefficient tester

Abstract

The invention relates to a numerical control glass production method based on one expansion coefficient tester. The method comprises the following steps: simultaneously measuring three physical parameters, namely an expansion coefficient i, a conversion point tg and an expansion softening point tf, of standard glass and a glass sample collected in real time by using the same expansion coefficient tester; and glass production is controlled. According to the method, glass production is controlled by adopting three parameters including the expansion coefficient alpha, the conversion point tg and the expansion softening point tf measured by the expansion coefficient measuring instrument, the operation is simple, the use is convenient, and the guidance of numerical control glass production is facilitated.

Description

Technical Field

[0001] The present invention relates to a method for controlling glass production based on parameters measured by an expansion coefficient measuring instrument Background Art

[0002] Chinese patent CN101900699A discloses a thermal expansion coefficient measuring instrument, measuring system and measuring method. The patented technology does not need to make the sample to be measured into a rod-shaped body with specific geometric dimensions before measuring; it is highly tolerant to the shape of the sample to be tested, which can be a rod, a heterogeneous rod, a tube, a strip, a sheet, or even the whole sample is placed in the measuring instrument for measurement, and the linear thermal expansion coefficient of multiple samples can be measured simultaneously.

[0003] At present, some advanced countries in the world generally use three physical parameters of glass expansion coefficient, density and softening point to control glass production. These three parameters usually require three corresponding instruments, which have the disadvantages of being outdated, requiring samples to be in a certain shape, being difficult to read directly, and not being accurate enough. Summary of the invention

[0005] In order to overcome the above-mentioned defects, the object of the present invention is to provide a numerical control glass production method based on an expansion coefficient measuring instrument.

[0006] To achieve the above-mentioned purpose, the CNC glass production method based on the expansion coefficient measuring instrument of the present invention comprises the following steps: using the same expansion coefficient measuring instrument to simultaneously measure the three physical parameters of the expansion coefficient á, transition point tg, and expansion softening point tf of the standard glass and the glass sample collected in real time; so as to control the glass production.

[0007] Furthermore, the method described is specifically as follows:

[0008] Put the standard glass and the glass products collected in real time into the test position of the expansion coefficient tester;

[0009] Start the expansion coefficient tester and measure the expansion coefficient of the standard glass. tg1tf1 and real-time acquisition of glass samples tg2tf2;

[0010] The above two sets of test results are compared and analyzed to adjust the glass formula.

[0011] Furthermore, the method described is specifically as follows:

[0012] 1) Select glass samples collected in real time;

[0013] 2) Measure the length of the sample at room temperature;

[0014] 3) Place the standard glass and the glass sample collected in real time between the brackets of the fixed rods at the two test positions of the dilatometer sample bracket, respectively, so that the sample is coaxial with the moving rod and parallel to the fixed rod;

[0015] 4) Turn on the power switch of the temperature controller and the upper row of the display screen will show the actual process value;

[0016] 5) Turn on the power switch of the computer and the collector; click GE / Login / Fill in the original length of the sample / Real-time collection / Open the collection display program window on the desktop in sequence;

[0017] 6) Adjust the initial reading of the displacement sensor: Loosen the fixing screws of the displacement sensor bracket, move the base of the displacement sensor bracket so that the displacement sensor probe is aligned with the center of the upper end surface of the moving rod and contacts the moving rod, then slowly slide the lower slider downward until the displacement number in the displacement column is around 0.0000, then tighten the fixing screws of the upper slider, use clockwise or counterclockwise rotation of the displacement sensor bracket fine-tuning knob to make the displacement starting point in the displacement column at the appropriate position, and then tighten the fixing screws of the lower slider;

[0018] 7) Turn on the elevator up button to allow the sample to slowly enter the heating furnace until it reaches the predetermined height;

[0019] 8) The sample enters the heating furnace so that the sample can stand in the furnace and reach equilibrium with the furnace temperature until the furnace temperature stops changing;

[0020] 9. Raise the temperature to a predetermined temperature to measure the displacement of the standard glass and the glass sample collected in real time; and continue to raise the temperature until the expansion curve on the computer display screen reaches the highest point and then stop heating;

[0021] 10) After clicking the stop button, the display automatically generates the test results.

[0022] 11) Compare and analyze the test results of the two samples to adjust the glass formula. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0025] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] The present invention aims to simultaneously measure the expansion coefficient α, transition point tg and expansion softening point tf of standard glass and sample glass by using an expansion coefficient meter (for example: ZNO-TIII average expansion coefficient meter produced by Beijing Jinghaiquan Sensing Technology Co., Ltd.), and use the measured expansion coefficient α, transition point tg and expansion softening point tf three parameters to adjust the glass formula to control glass production.

[0029] The inventor believes that the coefficient used in the calculation process of the sink-float method for measuring glass density is actually the coefficient of buoyancy change caused by the expansion of the heated glass volume; it has a strong correlation with the expansion coefficient; and the softening point T s It is also closely related to the expansion softening point tf, which can be regarded as the softening point deformation point at low temperature. Therefore, the inventor believes that the expansion coefficient α, the transformation point tg and the expansion softening point tf measured by the thermal expansion coefficient measuring instrument can be used to control glass production. In particular, high borosilicate and medium borosilicate glasses are sensitive to the expansion coefficient and have relatively simple compositions.

[0030] Example

[0031] like Figure 1 As shown, the numerical control glass production method based on the expansion coefficient measuring instrument of the present invention comprises the following steps:

[0032] Put the standard glass and the glass products collected in real time into the test position of the expansion coefficient measuring instrument; the standard glass is a qualified sample or a standard sample glass.

[0033] Start the expansion coefficient tester and measure the expansion coefficient of the standard glass. tg1tf1 and real-time acquisition of glass samples tg2tf2;

[0034] The test results of the two samples mentioned above were compared and analyzed to adjust the glass formula.

[0035] Test steps:

[0036] 1. Sample preparation: The sample should be free of bubbles, streaks, and solid, and must be annealed before testing.

[0037] 2. Use a vernier caliper with an accuracy of 0.02 mm to measure the length of the sample at room temperature, for example, L = 99.5 mm.

[0038] 3. Sample loading: Use ear cleaning bulbs to clean the two end faces of the sample, the two end faces of the quartz rod, and the upper surface of the quartz bracket. Then place the sample between the brackets of the fixed rod, and try to make the sample coaxial with the moving rod and parallel to the fixed rod.

[0039] 4. Turn on the power switch of the temperature controller and the upper display will show the actual process value.

[0040] 24℃; the lower row displays the current set value. If the temperature sensor is a K-type thermocouple, it needs to be preheated after powering on until the temperature display window of the temperature controller remains unchanged, for example, 28℃.

[0041] 5. Turn on the power switch of the computer and the collector. Click GE / Login / Fill in the original length of the sample / Real-time collection / Open the collection display program window on the desktop.

[0042] 6. Adjust the initial reading of the displacement sensor: loosen the fixing screws of the displacement sensor bracket, move the base of the displacement sensor bracket so that the displacement sensor probe is aligned with the center of the upper end surface of the moving rod and contacts the moving rod, then slowly slide the lower slider downward until the displacement number in the displacement column is around 0.0000. At this time, you can lock the fixing screws of the upper slider, and use clockwise or counterclockwise rotation of the displacement sensor bracket fine-tuning knob to make the displacement starting point in the displacement column at an appropriate position (i.e. between 0.0001-0.2000, for example 0.1707), then tighten the fixing screws "38" of the lower slider, and then gently tap around the hole of the quartz fixed rod seat with your fingers until the number in the displacement column remains basically unchanged.

[0043] 7. Turn on the lift button to allow the sample to slowly enter the heating furnace. It will automatically stop when it reaches the set position and the furnace cover will be added at the same time.

[0044] During the rising process of the elevator, you should always observe whether the numbers in the displacement column change continuously and obviously. If so, you should check whether the furnace cover touches the quartz rod and make adjustments.

[0045] 8. The sample enters the heating furnace, and then gently taps the quartz rod seat with your fingers until the value in the displacement column remains basically unchanged. The sample needs to be left in the furnace to reach equilibrium with the furnace temperature until the furnace temperature stops changing.

[0046] 9. Heating:

[0047] 9.1.1 Turn on the power switch of the temperature controller. One second later, the upper row of the temperature controller display shows the actual process value, such as 25°C; the lower row shows the current set value or P100;

[0048] 9.1.2 Press the up key △ or down key ▽ on the panel to adjust the current setting value to the upper limit of the temperature to be controlled, such as 300℃ (set according to the highest temperature required)

[0049] 9.1.3 Adjust the value of P (the larger the P value, the faster the heating speed. According to regulations, the heating speed should be controlled at 4-5℃ / min). For example, adjust to: P 35

[0050] 9.1.4 Setting the upper limit temperature of heating

[0051] 9.1.5 Press the heating switch of the temperature controller to start heating (it is normal for the voltmeter pointer on the temperature controller to swing intermittently during the heating process).

[0052] 9.1.6 When the temperature reaches the test end point, for example, the temperature is 300℃ and the displacement is 0.2649 (if only the expansion coefficient is measured, the end point is 300℃. If Tg and Tf need to be measured, continue to heat until the expansion curve on the computer screen reaches the highest point), click the stop button on the screen and turn off the heating switch.

[0053] 10. After clicking the stop button, the display automatically generates the test results.

[0054] 11. Calculate the average linear thermal expansion coefficient:

[0055] You can also select the above test data records, for example, the displacement value at 28°C is 0.1707; the displacement value at 300°C is 0.2649 and substitute it into the following formula for calculation:

[0056]

[0057] Right now:

[0058]

[0059] 12. Print the test results and make comparative analysis to adjust the glass formula.

[0060] The present invention is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of ordinary technicians in the field without departing from the purpose of the present invention. Many other changes and modifications that do not depart from the concept and scope of the present invention should be regarded as the protection scope of the present invention.

[0061] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0062] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for controlling glass production based on parameters measured using an expansion coefficient measuring instrument, characterized in that: The same expansion coefficient measuring instrument is used to simultaneously measure the expansion coefficient á, transition point tg, and expansion softening point tf of the standard glass and the glass sample collected in real time, so as to control the glass production.

2. The method for producing CNC glass by using an expansion coefficient measuring instrument according to claim 1, characterized in that: The method described is specifically as follows: Put the standard glass and the glass products collected in real time into two test positions of the same expansion coefficient measuring instrument; Start the expansion coefficient measuring instrument to measure the á11tg1 tf1 of the standard glass and the á2tg2tf2 of the glass sample collected in real time; The test results of the above two samples were compared and analyzed to adjust the formula of the glass.

3. The method for producing CNC glass by using an expansion coefficient measuring instrument according to claim 1, characterized in that: The method described is specifically as follows: 1) Select glass samples collected in real time; 2) Measure the length of the sample at room temperature; 3) Place the standard glass and the glass sample collected in real time between the quartz fixed rod and the bracket at the two test positions respectively, so that the sample is coaxial with the moving rod and parallel to the fixed rod; 4) Turn on the power switch of the temperature controller and the upper row of the display screen will show the actual process temperature value; 5) Turn on the power switch of the computer and the collector; click GE / Login / Fill in the original length of the sample / Real-time collection / Open the collection display program window on the desktop in sequence; 6) Adjust the initial reading of the displacement sensor: Loosen the displacement sensor bracket fixing screws, move the displacement sensor bracket base so that the displacement sensor probe is aligned with the center of the upper end surface of the quartz moving rod and contacts the moving rod, then slowly slide the lower slider downward until the displacement number in the displacement column is around 0.0000, then tighten the fixing screws of the upper slider, use clockwise or counterclockwise rotation of the displacement sensor bracket fine-tuning knob to make the displacement starting point in the displacement column at the appropriate position, and then tighten the fixing screws of the lower slider; 7) Turn on the lift button to allow the sample to slowly enter the heating furnace until it stops at the specified position and the furnace mouth is covered; 8) The sample enters the heating furnace so that the sample can stand in the furnace and reach equilibrium with the furnace temperature until the furnace temperature stops changing; 9) Heating to a predetermined temperature to measure the initial displacement of the standard glass and the glass sample collected in real time; and continuing to heat until the expansion curve on the computer display screen shows the highest displacement point, and then stopping heating; 10) After clicking the stop button, the display automatically generates the test results. 11) Compare and analyze the above two test results to adjust the glass formula.

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