关键词: 热态信息链, 信息挖掘, 龙门加工中心, 结构优化

Abstract: To analyze the effect of parts' thermal deformation on thermal errors, a concept of thermal information chain was proposed to describe relationships between parts and the thermal characteristics of whole machine, and a machine tool's thermal-structural coupled finite element analysis model including information of temperature and thermal displacement was employed as the chain's carrier. Based on the thermal information chain, a mining method of machines' thermal information was presented to find the weak link which led to the whole machine's accuracy decrease in machine tool's parts. Taking a Gantry Machining Center as research object, thermal information mining of this machine was implemented, and according to the mining results, structural optimizations were conducted. The experiment indicated the optimized machine's thermal errors deceased by 85.5μm at z direction and proved the validity of the proposed method.

Key words: thermal information chain, information mining, gantry machining center, structural optimization