A kind of numerical control borer facing head depth-feed mechanism

The invention discloses a kind of numerical control borer facing head depth-feed mechanism, including electric machine main shaft, rotary body, tool rest, it is divided into two planetary reduction box of electric machine main shaft rear and front end, coaxially it is arranged in the central shaft in electric machine main shaft and the gear-box and servomotor located at main spindle box rear portion, the casing and output shaft of planetary reduction box coaxially assemble with electric machine main shaft, the casing of first planetary reduction box is connected with rotary body, its output shaft is connected by pinion and rack and tool rest, the front end of central shaft and the casing of the first planetary reduction box are connected, its rear end is connected by shaft coupling with the output shaft coaxial transmission of the second planetary reduction box, the rear end of electric machine main shaft is connected by the casing of gear-box and the second planetary reduction box, the output shaft of servomotor is connected with the casing coaxial transmission of the second planetary reduction box.The present invention is simple in construction, small volume, stability are high, can ensure lathe stabilization, efficient operation, realizes the full automation of numerical control borer.