TFT glass BOD process rapid dynamic weighing system and weighing method

Abstract

The invention relates to a TFT glass BOD process rapid dynamic weighing system. The system comprises two groups of weighing devices and a plc, wherein one group of weighing devices are arranged at a no-load weighing station and used for measuring the weight of a transport trolley, the other group of weighing devices is arranged at a load weighing station and is used for measuring the weights of the transport trolley and the weighing glass, each group of weighing devices comprises two high-precision measuring scales, and the two high-precision measuring scales jointly complete weight measurement. A TFT glass BOD process rapid dynamic weighing method comprises steps that the weight of the transport trolley is measured firstly, then the weight of the transport trolley and the weight of the weighing glass are measured, and the weight of the weighing glass is obtained by taking a difference value; in the weighing process, a weight change curve of a current weight value of the weighed objectmeasured in real time is drawn, the sampling frequency is calculated by more than 200 milliseconds, previous data with large fluctuation is avoided, and whether weighing is completed is judged according to the data whether weight change curve change is in the stable stage, so the plc can conveniently calculate to obtain accurate weighing data at the first time.

Description

technical field [0001] The invention relates to the field of glass substrate production, in particular to a fast dynamic weighing system and a weighing method for TFT glass BOD process. Background technique [0002] At present, in the production process of the hot end of the glass substrate, due to the continuous thinning of the substrate thickness, the tempo of the board breaking process is further accelerated. After thinning, the accuracy of the board weight data is required to be improved. Adjustment needs to be done manually, and this method can no longer meet the process requirements after thinning. [0003] Due to the particularity of substrate glass production, inconsistent production will have a great impact on the stability of product quality and product consistency, which will affect the production efficiency of the entire production line, reduce production capacity, and greatly increase the PAC Rising, reducing the comprehensive yield of finished products. [00...

AI Technical Summary

Problems solved by technology

[0002] At present, in the production process of the hot end of the glass substrate, due to the continuous thinning of the substrate thickness, the tempo of the board breaking process is further accelerated. After thinning, the accuracy of the board weight data is required to be improved. Adjustment needs to be done manually, and this method can no longer meet the process requirements after thinning

[0003] Due to the particularity of substrate glass production, inconsistent production will have a great impact on the stability of product quality and product consistency, which will affect the production efficiency of the entire production line, reduce production capacity, and greatly increase the PAC Increase and decrease the comprehensive yield of finished products

[0004] At present, the key problem that the BOD process cycle does not meet the process requirements is the plate weight accuracy requirement of TFT thin plate (below 0.5mm) glass

If the beat does not meet the requirements and the data is incoherent, it will cause unstable production, partial scrapping of products, poor quality and other problems

Factors such as the narrow working environment in the BOD area, ambient airflow, vibration, and large total weight bring difficulties to the layout and installation of high-precision weighing equipment, poor stability, and low efficiency.

Unable to improve weighing accuracy through high-precision weighing equipment

When the traditional method measures the weight of the plate, it needs to wait for the glass plate on the production line to be in a stable state before measuring, which takes a long time, and it is impossible to judge whether the data measured after the glass plate is in a stable state is accurate. All products are measured and valid data are obtained

Images