Device of processing tempered glass, apparatus of processing tempered glass and method of using device of processing tempered glass

A processing apparatus for a tempered glass for processing the chemical tempered glass having a surface reinforced layer by using a processing device in a condition of vibrating the shaft-shaped processing device in a direction of a shaft center while rotating the processing device around the shaft center thereof,

• wherein at least an outer surface of a front end of the processing device is a surface of holding diamond grind grains,
• a concave portion is formed on a central part in a radial direction of a front surface of the processing device,
• a vibration mechanism of vibrating the processing device toward the chemical tempered glass is formed;
• a vibration adjusting means of adjusting the vibration mechanism is formed;
• and
• a control means of controlling the vibration mechanism is formed such that the vibration of the processing device to the chemical tempered glass is feedback-controlled to approach an amplitude and a frequency of the processing device to a target amplitude and a target frequency, respectively, and values of the target amplitude and the target frequency are set to change at respective positions in a direction of thickness of the chemical tempered glass accompanied with the processing of the chemical tempered glass, which do not belong to a range of generating quality degradation, and the feedback control is carried out at every sample frequency of 0.3 msec or less.

A method of processing a tempered glass comprising:

• preparing the processing device including a shaft shape, at least an outer surface of a front end which is a surface of holding diamond grind grains, and a concave portion formed on a central part in a radial direction of a front surface thereof,
• processing the chemical tempered glass having a surface reinforced layer by using the processing device which is rotated around its shaft center and vibrated in a direction of extending the shaft center,
• feed-back controlling the vibration of the processing device to the chemical tempered glass to approach an amplitude and a frequency of the processing device to a target amplitude and a target frequency, respectively, and setting values of the target amplitude and the target frequency to change at respective positions in a direction of thickness of the chemical tempered glass accompanied with the processing of the chemical tempered glass, which do not belong to a range of generating quality degradation;
• and
• carrying out the feedback control at every sample frequency of 0.3 msec or less.

A method of using a processing device of a tempered glass comprising:

• preparing the processing device including a shaft shape, at least an outer surface of a front end which is a surface of holding diamond grind grains, and a concave portion formed on a central part in a radial direction of a front surface thereof;
• processing the chemical tempered glass having a surface reinforced layer by using the processing device which is rotated around its shaft center and vibrated in a direction of extending the shaft center;
• feed-back controlling the vibration of the processing device to the chemical tempered glass to approach an amplitude and a frequency of the processing device to a target amplitude and a target frequency, respectively, and setting values of the target amplitude and the target frequency to change at respective positions in a direction of thickness of the chemical tempered glass accompanied with the processing of the chemical tempered glass, which do not belong to a range of generating quality degradation;
• and
• carrying out the feedback control at every sample frequency of 0.3 msec or less.