Machining electric spindle and numerical control machine tool

Abstract

The invention relates to the technical field of numerical control machine tools, in particular to a machining electric spindle and a numerical control machine tool. The machining electric spindle comprises a main shaft, a stator and rotor excitation winding, a fixing support, an induction coil and a controller, and the main shaft is of a hollow structure; the stator and rotor excitation winding is arranged outside the main shaft in a surrounding manner and is used for driving the main shaft to rotate around the axis of the main shaft; the first end of the fixing support is connected with the inner wall of the main shaft, and the second end of the fixing support is suspended in the main shaft; the induction coil is arranged at the second end of the fixed bracket; and the controller is in communication connection with the induction coil and the stator and rotor excitation winding, and can control the stator and rotor excitation winding to adjust the rotating speed when the current generated in the induction coil is greater than a preset value. The induction coil is arranged in the main shaft, is not influenced by the external environment, is high in precision and long in service life, and the controller directly controls the stator and rotor excitation winding to finely adjust the rotating speed of the main shaft when generating current in the induction coil, so that the efficiency is greatly improved, and complicated wiring is not needed.

Description

Technical field [0001] The present invention relates to the technical field of CNC machine tools, in particular to a machining spindle and CNC machine tools. Background technique [0002] CNC machine tool equipment manufacturing industry is the industrial machine tools, machining accuracy is an important indicator to evaluate its performance. When the spindle speed CNC machining complex parts are generally constant, and is sometimes due to the natural frequency of the vibration frequency of the cutting part coupling surface chatter marks generated, resulting in decreased surface quality, but also easy to form stress concentration areas, resulting in fatigue fracture of parts, which greatly reduces the complexity parts yield and service life. There are a displacement sensor by attaching the spindle to monitor abnormal vibration, to connect the CNC adaptive processing, the process efficiency is low, high precision, wiring complicated and easily damaged. Inventive content [0003] ...

AI Technical Summary

Problems solved by technology

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that the displacement sensor is pasted on the main shaft to monitor the abnormal vibration, the accuracy is not high, the wiring is complicated and easy to be damaged, so as to provide a high-precision, long-life machining electric spindle and CNC machine tool

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