Method and system for intelligently adjusting pre-tightening force of bearing of electric spindle

Abstract

The invention provides a method and a system for intelligently adjusting the pre-tightening force of a bearing of an electric spindle. According to the method and the system, a positioning guide blockis arranged in a spindle device and is hydraulically driven to move and drive a bearing outer ring to move, and therefore the contact angle of the bearing inner ring and the bearing outer ring can beadjusted, and the effect of adjusting the pre-tightening force of the bearing is achieved. Meanwhile, an optimal adaptation data table of different materials and pre-tightening force is established in advance, the pre-tightening force which most adapts to the material can be automatically selected based on the material of a to-be-machined workpiece, and the pre-tightening operation of the bearingis automatically completed, and thus the magnitude of the pre-tightening force of the bearing can be matched with the type of a machined plate. Besides, the method and the system provided by the invention can judge the actual abrasion condition of the bearing by detection of the movement distance of the bearing outer ring and the current pre-tightening force of the bearing and combination with the theoretical relation between the position of the bearing outer ring and the pre-tightening force of the bearing; and the oil supply amount can be properly corrected based on the abrasion condition of the bearing so as to make up the influence caused by long-term abrasion of the bearing.

Description

Technical field [0001] The disclosed embodiment generally relates to the field of spindle processing, and more particularly relates to a method and a system for intelligently adjusting the bearing preload of an electric spindle. technical background [0002] According to the operating requirements of lathes, when turning parts with lathes, the hardness of the machined parts should be determined first, because the best machining speed and stiffness of lathes corresponding to parts with different hardness are different, for example, the best machining speed and stiffness of lathes corresponding to machined parts made of steel, alloy, copper, aluminum and other materials are different. However, when machining parts, if the machining speed and stiffness of lathe are not selected correctly, the parts machined by lathe can't meet the use requirements. The rigidity of lathe spindle is directly determined by the preload of spindle bearing. In order to meet the processing requirements of ...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies of the prior art, one of the purposes of the present invention is to provide a method for intelligently adjusting the bearing pretightening force of th

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