Method of processing tempered glass and apparatus of processing tempered glass

Abstract

To provide a method of processing a tempered glass in a simple and appropriate manner while a degree of freedom of processing is secured. Vibration of the processing device is controlled in a feedback fashion such that a vibration amplitude and a vibration frequency of the processing device approach to a target vibration amplitude and a target vibration frequency not to keep them in a range where a value of worsening the quality is generated. Further, a specified sample cycle of 0.3 msec or less in the feedback control is employed.

What is claimed is;: 
     
         1 . An apparatus of processing a chemical tempered glass having a surface reinforced layer by means of a processing device which is vibrated under rotation thereof,
 the apparatus comprising;   a vibration mechanism vibrating the processing device to the chemical tempered glass;   a vibration adjusting means adjusting the vibration mechanism; and   a control means by which, by controlling the vibration adjusting means, vibration of the processing device to the chemical tempered glass is controlled in a feedback fashion such that a vibration amplitude and a vibration frequency of the processing device approach to a target vibration amplitude and a target vibration frequency, the target vibration amplitude and the target vibration frequency are not kept in a range where a value of worsening the quality of the chemical tempered glass is generated, the value changing along thickness of the chemical tempered glass during the processing of the chemical tempered glass, and the feedback control is implemented every sample cycle of 0.3 msec or less.   
     
     
         2 . The apparatus of processing the tempered glass as claimed in  claim 1 , wherein the target vibration amplitude is set in a range from 3 μm to 9 μm and the target vibration frequency is set in a range from 60 kHz to 64 kHz in the above control means. 
     
     
         3 . The apparatus of processing the tempered glass as claimed in  claim 1 , wherein the number of rotation of the processing device in the control means is set in a range from 2000 rpm to 30000 rpm.