Double-headed output motorized spindle with the ability to eliminate the influence of axial thermal deformation

Abstract

The invention discloses a double-end output electric main shaft with an axial thermal deformation influence eliminating function. The double-end output electric main shaft comprises a driving motor main shaft assembly and a driven main shaft assembly. The driving motor main shaft assembly is composed of a driving rotating shaft, front and back supporting bearings, a stator of a built-in motor, a rotor of the built-in motor and the like; the driven main shaft assembly is composed of a driven rotating shaft, a bearing base, a supporting bearing and the like. The driving rotating shaft and the driven rotating shaft are each provided with an output end tool connector. A moment transmission connection structure capable of freely sliding in the axial direction is adopted between the driving rotating shaft and the driven rotating shaft, power of the built-in motor can be transmitted to the driven rotating shaft, and axial stretching of the rotating shafts is allowed during thermal deformation of the rotating shafts so as to eliminate influences. According to the double-end output electric main shaft, two cutters can be clamped at the left output end and the right output end so as to conduct machining at the same time, influences of output end axial position changes and supporting bearing load increase caused by axial thermal deformation of the rotating shafts can be eliminated, the position accuracy of the output end of the electric main shaft can be improved, and the work service life of the supporting bearings is prolonged.

Description

technical field [0001] The invention relates to the technical field of mechanical processing and electric spindle, in particular to a double-head output electric spindle capable of eliminating the influence of axial thermal deformation. Background technique [0002] High-speed cutting can greatly improve cutting production efficiency, improve surface quality, shorten production cycle, and reduce production cost. High-speed electric spindle is a key component of high-speed cutting, and its function directly affects processing quality. Since the electric spindle is a precision component that rotates at high speed and adopts the form of a built-in motor, the heat dissipation of the electric spindle is not ideal, and the frictional heat generated by the high-speed bearing is also large. As the main heat source, the higher the rotational speed, the greater the frictional heat generation. Usually the electric spindle is assembled at normal temperature, and the spindle is heated a...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, and provide a double-head output electric spindle capable of eliminating the influence of axial thermal deformation. Machining accuracy, changes in bearing preload, etc.

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