On-line nondestructive thickness measuring device for advanced-generation substrate glass

Abstract

The invention discloses an on-line nondestructive thickness measuring device for advanced-generation substrate glass, which comprises a mounting bracket arranged above a glass transmission roller, themounting bracket is vertical to the transmission direction of a glass plate, a group of laser thickness measuring instruments are arranged at intervals along the mounting bracket, and probes of the laser thickness measuring instruments are vertically arranged downwards; the measuring device further comprises a laser thickness measuring control unit and an upper computer which are in communicationconnection with each other. Each laser thickness measuring instrument is connected with the laser thickness measuring control unit. When the glass plate is conveyed by the glass conveying roller, thelaser thickness measuring instrument detects the thickness of the glass plate in real time and feeds back a detection result to the upper computer; the device can measure the glass thickness of the glass plate on line before and after surface grinding, does not affect the surface quality of the glass, and improves the detection efficiency.

Description

technical field [0001] The invention relates to the technical field of glass substrate detection equipment, in particular to an online non-destructive thickness measurement device for high-generation substrate glass. Background technique [0002] In order to remove the defects formed on the glass surface during the float glass forming process, the ultra-clean surface substrate glass suitable for TFT panel production is processed. Usually, a polishing machine is used to grind the glass surface. In order to ensure the high consistency of the glass surface after surface grinding, the large-size substrate glass has strict requirements on the amount of grinding. Grinding amount is defined as the thickness value before grinding minus the thickness value after grinding. It is generally required that the grinding amount of the entire glass is controlled within the central value ± 0.5 microns. Accurately measuring the grinding amount of large-size substrate glass is critical to the ...

AI Technical Summary

Problems solved by technology

Glass middle point measurement is very difficult

[0005] 2. When manually measuring the glass surface, it is inevitable to touch the glass surface. The clean surface after surface grinding will be slightly scratched after contact with an ultrasonic thickness measuring instrument, which will affect the cleanliness of the glass surface and eventually reduce the product yield.

[0006] 3. Manual measurement of glass thickness is time-consuming and laborious. It takes about 30 minutes to measure nine points at a time in the existing production line, and it takes 60 minutes to measure each before and after surface grinding.

If more points are measured on a single panel, the time-consuming will increase proportionally

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