Automobile part machining drilling machine and working principle thereof

The automobile part machining drilling machine comprises a rack, a supporting mechanism is installed at the top of the rack, a power shell is installed on the surface of the supporting mechanism, a conversion sleeve is rotationally connected to the inner wall of the power shell, a drilling shaft is rotationally connected to the inner wall of the conversion sleeve, and a motor a and a motor b are fixedly installed on the circumferential side face of the power shell. The output shaft end of the motor a is in transmission connection with the conversion sleeve, the output shaft end of the motor b is in transmission connection with the drill shaft, a drill changing shell is fixedly installed at the end of the conversion sleeve, and a set of drill rod modules distributed in a circumferential array mode are installed on the inner wall of the drill changing shell. Through the arrangement of the drill replacing shell and the multi-drill-rod module, the device can efficiently complete drilling machining operation of au