Drilling of Borosilicate Glass with Feedback Control Based on Cutting Force

This paper deals with drilling of borosilicate glass with feedback control based on cutting force, in order to provide a basis for defect-free machining of through-holes on borosilicate-glass plates. In this work a machining system which can be operated at a predetermined cutting force by changing the feed rate based on cutting force measured by a piezoelectric type of cutting dynamometer was developed. Subsequently, drilling tests of borosilicate glass was carried out with the developed system. Based on the results of the drilling tests, It has been confirmed that feedback control based on cutting force has the possibility of defect-free drilling of borosilicate-glass plate under specific conditions.