Abstract
The spindle system is the core component of machine tool, And the spindle bearing temperature directly influences the size and direction of the spindle thermal error, as well as determines the machining surface quality. A complete spindle system including cutting force, bearing preload upload system, and precise description of bearing temperature field is beneficial to thermal error study and analysis of machining error. This paper set up a spindle system, which covers a preload upload system and a cutting force simulation system, and also a spindle bearing temperature measurement system. Besides, the bearing temperature fields were measured. Results show that optical fiber grating could be applied to the spindle bearing distribution temperature field measurement very well. It could play a certain role in promoting the development of intelligent spindle study.
Highlights
The spindle system has significant influences on the machine tool thermal error
The heat generated by the cutting force and bearing preload is the main heat source of the spindle system
On the basis of the thorough understanding of factors which interfere with the bearing temperature, this paper set up a spindle system which has a cutting force simulation system, bearing preload upload system and Fiber Bragg grating (FBG) sensors embedded into the spindle bearing housing, completing the distributed temperature measurement of spindle bearing outer ring
Summary
The spindle system has significant influences on the machine tool thermal error. The heat generated by the cutting force and bearing preload is the main heat source of the spindle system. The cutting force and bearing preload are the influence factors of bearing running conditions, the temperature rise and the uneven distributed temperature field especially. This research has been focused on for a long time and needs to make a big breakthrough urgently Traditional temperature sensors, such as thermal resistance, etc., are vulnerable to electromagnetic interference and exits logging phenomenon, so those sensors are not beneficial to the distributed temperature measurement, and cannot meet the requirement of the spindle bearing temperature measurement. On the basis of the thorough understanding of factors which interfere with the bearing temperature, this paper set up a spindle system which has a cutting force simulation system, bearing preload upload system and FBG sensors embedded into the spindle bearing housing, completing the distributed temperature measurement of spindle bearing outer ring
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