High-speed high-precision built-in dynamic and static piezoelectric main shaft

Abstract

The invention relates to a high-speed high-precision built-in dynamic and static piezoelectric main shaft. The high-speed high-precision built-in dynamic and static piezoelectric main shaft is characterized in that the main shaft comprises a box body, a front bearing and a rear bearing are arranged in the box body through a front bearing end cover and a rear bearing end cover correspondingly, and the front bearing and the rear bearing jointly bear a main shaft body internally provided with an online dynamic balancing head; the box body is provided with an oil inlet and an oil outlet, the oil inlet communicates with the oil outlet through an oil way, the oil way is divided into two parts, and one part enters the front bearing and the rear bearing through the oil inlet to suspend the main shaft body in a gap between the front bearing and the rear bearing to form pure liquid lubrication; and the other part is fed to the front bearing and the front bearing end cover to make the main shaft body achieve axial positioning, and a grinding wheel is arranged on the front bearing end cover through a flange disc. The high-speed high precision built-in dynamic and static piezoelectric main shaft is simple in structure, good in dynamic performance, large in rotation number of the main shaft, high in rotation precision and small in heat deformation and can be widely applied to grinding wheel electric main shafts of precise grinding machines, main shafts of numerical control machining centers and precise lathes and the like.

Description

technical field

[0001] The invention relates to the technical field of precision numerical control machine tools, in particular to a high-speed and high-precision built-in dynamic and static piezoelectric spindle. Background technique

[0002] With the proposal of Made in China 2025, higher requirements are put forward for the manufacturing industry, and CNC machine tools are required to develop in the direction of precision, high speed and intelligence. As the core component of CNC machine tools, the spindle's dynamic performance directly determines the processing of the machine tool. precision. At present, more and more high-end CNC machine tool spindles begin to adopt the electric spindle structure. The electric spindle integrates the machine tool spindle and the built-in motor rotor through interference fit, no longer uses belt or gear transmission, and saves the intermediate mechanical transmission. Link, and the main shaft components are relatively independent from th...

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