Feeding servo drive of CNC milling machine

The feed servo drive of the CNC milling machine is composed of a servo control path, a power reduction path and servo electrical effects. The function of the servo drive is to change the position mastering movement instruction from the CNC installation into the activities of the task components of the milling machine, so that the task table can be moved or accurately positioned according to the regular track, and the workpieces that meet the requirements of the pattern are processed. The subtle training command signal is reduced to a high-power signal that can drive the servo electric effect. Rarely used servo electrical effects include stepping electrical effects, DC servo electrical effects, and exchange servo electrical effects. The main optical axis components of CNC milling machines must not only satisfy the requirements of high precision on the finishing day, but also have the power of efficient cutting on the roughing day, so they should have higher dynamic, static stiffness and resistance to deformation. The main optical axis components mainly include the main optical axis, bearings, transmission parts and seals. Regarding CNC milling machines that have the power of active tool change, the main optical axis components should also be actively moved and installed by the machine tool, and the main optical axis can be stopped and installed Chip installation, etc.

 According to the difference in the absorption instruction, the servo drive has pulse type and imitation type. The imitation type servo drive form can be divided into DC servo drive and exchange servo drive according to the power supply type of the driving electric effect. Stepping electric effect adopts pulse driving form, and AC and DC servo electric effect adopts imitation driving form. It is to complete the absolute activities between the machine tool and the workpiece according to the set feed schedule in sequence, including curve feed activities and wrap activities. The feed drive installation of CNC milling machines mostly adopts servo generators to indirectly pull the ball screw around. The taper ring keyless connection or high-precision cross coupling structure is used between the electric effect shaft and the ball screw to lose the higher Transmission precision. Steel ball screw consists of screw, screw nut and steel ball. Its performance is to convert the winding activity into a curve activity. It is the most commonly used transmission part on machines and fine machines. The secondary performance is to convert the winding activity into a linear activity, or to convert torque into axial repetition. Sound has both high precision, reversibility and high frequency characteristics.