Evaluation method for cooling rate of float glass in different transverse regions of annealing high-temperature region
A cooling speed, float glass technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problem of inconvenient adjustment of annealing process parameters
Inactive Publication Date: 2019-03-08
CHINA LUOYANG FLOAT GLASS GROUP
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Problems solved by technology
Because this kind of calculation needs to select some physical parameters approximately, such as expansion coefficient, Poisson's ratio, etc., there is often a certain gap between the temporary stress obtained and the actual temporary stress, which brings inconvenience to the technicians to adjust the annealing process parameters
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[0017] The present invention will be described in detail in combination with specific embodiments:
[0018] When a factory produces 5mm glass, the glass plate is vertically exploded. Along the cross section of the entire glass plate, an average of 10 samples are taken, numbered in order from left to right, using the glass end face stress detection equipment PS-100 -MW polarimeter system to detect the end face stress of each sample, the obtained stress value of each point is shown in Table 1 below:
[0019] Table 1 Test results of stress value
[0020] Sample serial number
[0021] Based on the corresponding relationship between the stress value and the cooling rate in different regions of the glass in the transverse direction of the annealing high temperature zone, the relationship between the cooling rate is 3#>2#>1#>9#=10#>4#>5#>6#> 8#>7#, obviously, this kind of horizontal cooling system does not conform to the annealing principle. In response to the above test results, the e...
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The invention belongs to the technical field of glass production, and provides an evaluation method for cooling rate of float glass in different transverse regions of an annealing high-temperature region. The evaluation method for the cooling rate of the float glass in different transverse regions of the annealing high-temperature region comprises the steps as follows: taking an average of 7-15 glass samples along the cross section of a whole glass plate; then, numbering a plurality of glass samples sequentially, detecting end surface stress of each glass sample by glass end surface stress detection equipment, and comparing the obtained end surface stress values of all the points; sequencing the detected end surface stress of the plurality of glass samples, performing comparison with cooling rate laws of the glass plate in different transverse regions, evaluating whether the cooling rate of the position of each glass sample is appropriate, and if not, performing corresponding annealingprocess adjustment by engineers.
Description
Technical field [0001] The invention belongs to the technical field of glass production, and in particular relates to a method for evaluating the cooling speed of float glass in different lateral areas of an annealing high temperature zone. technical background [0002] During the annealing process of float glass, due to the different cooling speeds of various parts of the glass, stress is generated inside the glass; this stress can be divided into permanent stress and temporary stress, which are generated above the lower limit of the annealing temperature and below the lower limit of the annealing temperature. These two stages are usually called the high temperature zone and low temperature zone of glass annealing. Above the lower limit of annealing, the internal structure of the glass can be adjusted. At this time, the temperature difference of each part causes the structure to be poor and is maintained to form permanent stress; below the lower limit of annealing, the internal ...
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IPC IPC(8): G01N25/00
CPCG01N25/00
Inventor 陈琰张艳娟胡松涛王自强康彬姚佩
Owner CHINA LUOYANG FLOAT GLASS GROUP