Methods of measuring and compensating cutting size on chamfering machine of sheet material

Abstract

A method for measuring and compensating for the cutting size in a plate material is provided to automatically perform calculation and input of a compensated value based on a measured value. A method for measuring and compensating for the cutting size in a plate material(1) includes the steps of: cutting a side periphery of the plate material parallel to a feeding direction by reading two marks stuck to a direction perpendicular to the feeding direction of the plate material and determining the feeding direction of the material; detecting the difference between the positions in the direction perpendicular to the feeding direction of the two marks by reading the two marks stuck to the feeding direction on one side of two cameras(5,6); and detecting the cutting size of the periphery of the plate material by the two cameras.

Description

technical field [0001] The present invention relates to a method of measuring and correcting processing dimensions in a chamfering device used for processing the edges of rectangular glass substrates such as display screens, that is, to a method of measuring and correcting processing dimensions of a plate as an object of test processing and sampling inspection. It is a method to process dimensions, perform automatic measurement, and correct the positions of the table and tools of the chamfering device based on the measured values. Background technique [0002] A chamfering device for a glass substrate is a device that chamfers or rounds sharp ridges and corners generated on the edge of a glass substrate cut by cutting or the like with a tool (usually a grinding wheel). Such as Figure 8 As shown, generally, such a chamfering device has a worktable 2 for absorbing a glass substrate 1 with negative pressure, and tools 3 arranged on both sides of the workbench. The worktable 2...

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Problems solved by technology

[0009] However, in the above-mentioned conventional methods, since the measurement of the processing size is carried out manually, there are the following problems: the operator must have skilled skills; there may be measurement errors due to carelessness and misreading; It takes time to calculate the correction value of the table angle and tool position by measuring the value; the operator needs to manually input the calculated correction value into the controller of the chamfering device, which may cause input errors, etc. Wait

In addition, as a problem specific to the chamfering device, the following problem also arises: with the increase in area and thickness of the glass substrate as the workpiece, the substrate processed for the test and the substrate for sampling inspection are separated from the chamfering device. The difficulty of taking it out and setting it on the detection device increases; and, with the enlargement of the workbench, the error of the processing size also increases

[0010] That is, since the glass has a large area and a thin thickness, if care is not taken when transporting the substrate, the substrate may be broken during the transport process. Therefore, it is necessary to prepare a special transport device to take the measured substrate out of the chamfering device. Installed on the inspection device, or several operators need to carry out joint work with special care to transport the board, which will increase the burden on the equipment or work load, and it will take time to transport.

In addition, due to the increase in the size of the substrate and the resulting increase in the area of ​​the table, the following problems will occur, that is, the angle error of the table in the feed direction and the error in flatness or levelness, so that along the workpiece The change of the chamfer width in the edge direction, and the error of the inconsistent width of the upper and lower chamfer increases

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