A study on burr in low frequency vibratory drilling. Case of drilling for aluminum.

In drilling, the burr is always formed at the inlet and outlet of drilled hole. Various troublesome problems in the automatic machining process are induced often by the burr. Therefore, it is very useful to find out an effectual method for the prevention of the burr in drilling process. Under such a present day situation, the low frequency vibratory drilling was chosen as one of the subjects of our studies, that is, effects of the cutting conditions and the cutting force on the burr shape in this drilling were examined and compared with those in the conventional drilling. From this study, it was found that the application of this method for drilling of aluminum is effective to prevent the burr.