The main components of the power head:
(1) Main movement
The main movement of the electric and pneumatic automatic feed drilling power head is driven by a three-phase asynchronous motor, and the torque of the motor is transmitted to the spindle through the synchronous toothed belt and spline shaft. Different spindle speeds can be replaced by different synchronous toothed belts. Round to achieve. Since the main movement of the power head is driven by a motor, the spindle has good speed characteristics, and the output power and torque are large, which can be adapted to multi-axis drilling and processing conditions with larger apertures.
(2) Feed movement
Since pneumatic transmission has the advantages of fast action response, good environmental adaptability, simple structure, small size, etc., and can realize stepless speed regulation, long working life, and convenient power source source, the feed movement of the power head adopts compressed air As a power source. Taking into account the compressibility of air, the smoothness of the power head movement when the load changes is poor. The adjustment and control of the work advance speed are realized by a hydraulic governor, and the fast forward and fast rewind speeds of the power head are respectively exhausted. Flow valve to adjust.
(3) Control system
The feed motion of the electric and pneumatic automatic feed drilling power head adopts compressed air as the power source, and the control of the feed motion also adopts a pneumatic control system. It consists of a two-position five-way air control valve, a motorized valve, and two The manual valve is composed of several throttle valves and two external control air source ports. It has a compact structure and has the functions of manual and remote control operation and the protection functions of in-situ and previous signals and reset signals. The fast progress and work progress of the power head can be continuously adjusted through the stopper.
(4) Mechanical structure characteristics
The electric and pneumatic automatic feed drilling power head is a drilling power head that integrates the main motion, feed motion and control device of the power head. In order to achieve a compact shape, the power head adopts a spindle embedded in the cylinder structure. Concentric with the piston rod, the piston rod is hollow. Imported rolling bearings are installed inside to improve the rotation accuracy of the main shaft. The main shaft is installed on the bearing and connected to the motor by a timing belt through splines. The cylinder block is fixed on the bracket. The piston rod is equipped with a hydraulic governor and stroke adjustment screws. , By adjusting the screw to collide with the limit switch, the power head spindle can be reset.