Electric spindle structure suitable for longhole inner circle processing

Abstract

The invention relates to an electric spindle structure suitable for longhole inner circle processing. The electric spindle structure comprises a motor shell (13), a motor rotor (9), a motor stator (8), a motor spindle (7), and a motor front bearing (6) and a motor front bearing seat (12) which are used for supporting the motor spindle (7), a motor rear bearing (10) and a motor rear bearing seat (11), a grinding spindle shell (3), a grinding spindle (2), a grinding wheel front bearing (1) and a grinding wheel rear bearing (2) which are used for supporting the grinding spindle (2), and a coupler (5) which is connected with the grinding spindle (2) and the motor spindle (7); and the electric spindle structure is characterized in that: the motor stator (8) is arranged in the motor shell (13);and the motor spindle (7) is arranged at the axial line position in the motor shell (3). The processing accuracy and assembly accuracy of the spindle structure can be guaranteed.

Description

technical field [0001] The invention relates to mechanical processing equipment, which is an electric spindle structure used for machining (boring, grinding) the inner circle of deep holes. Background technique [0002] The electric spindle for deep hole inner circle machining is a kind of electric spindle structure that penetrates the tool into the inner hole to cut and grind the inner circle surface of the workpiece. The current electric spindle for deep hole inner circle machining needs to go deep into the inner hole of the workpiece because the tool needs to be machined. The spindle adopts a cantilever type single support with a long overhang, which leads to low rigidity of the spindle end, and is prone to bending deformation under the action of cutting force, which affects the spindle. cutting quality. Due to the limitation of the aperture of the workpiece to be processed, the diameter of the spindle should not be too large, and the spindle needs to have a built-in mot...

AI Technical Summary

Problems solved by technology

The current electric spindle for deep hole inner circle machining needs to go deep into the inner hole of the workpiece because the tool needs to be machined. The spindle adopts a cantilever type single support with a long overhang, resulting in low rigidity of the spindle end, which is prone to bending deformation under the action of cutting force, which affects the performance of the spindle. cutting quality

Due to the limitation of the aperture of the workpiece to be processed, the diameter of the spindle should not be too large, and the spindle needs to have a built-in motor, which leads to the structure of the spindle being too slender, it is difficult to meet the sufficient precision requirements during spindle machining, and the assembly process of the spindle is also very cumbersome. Difficult to replace, under alternating loads, reduces the service life of the spindle bearings

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