Abstract
In this article, an integrated thermal model is numerically analyzed to calculate the heat generation of spindle bearings and temperature distribution of the spindle system, with consideration of the operating conditions and lubrication conditions, such as rotation speed, preload, and oil film thickness. Surface roughness is an important parameter of elastohydrodynamic lubrication, which is measured by an optical topographer and characterized by statistical parameters. The experimental measurement system of the precision spindle is composed of a set of laser triangulation sensors and thermal infrared imagers. After the thermal characteristics, mathematical models are experimentally verified, and the effects of cooling oil temperature, cooling oil flow rate, and characteristic dimensions of the cooling channel on keeping the spindle gradient are analyzed in detail. The results indicated that temperature gradient across the spindle system can be significantly controlled by optimizing the technical parameters of the oil-cooling system.
Highlights
Research on crucial functional components of machine tools, especially high-precision, high-power, and high-speed spindles, is an effective method to improve modernized manufacturing industries
Thrust force, rotational speed, lubrication condition, and surface asperities are calculated in detail
The model provides a practical model for the thermal characteristics of the spindle-bearing system due to the finite number of thermal nodes in the heat transfer model of the spindle system in the radial direction
Summary
Research on crucial functional components of machine tools, especially high-precision, high-power, and high-speed spindles, is an effective method to improve modernized manufacturing industries. Spindles must be assembled with high rotation precision and dynamics performance under the influence of rotational speeds, applied loads, preload, lubrication methods, and cooling conditions.[1,2,3] In the machining process, tool wear degree is important, which influences the spindle dynamics and thermal characteristics.[4] Friction heat generation in the bearings is the main heat source in the spindles. The heat transfers to inner ring, balls, outer ring, spindle shaft, and housing with oil-cooling channel. The spindle system reaches the corresponding temperature distribution
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
