机械科学与技术2018，Vol.37Issue(6)：839-847,9.DOI:10.13433/j.cnki.1003-8728.2018.0604
龙门加工中心地脚螺栓组分步预紧工艺研究
Research on Step Pre-loading Technology of Anchor Bolts Groups in Gantry Machining Center Installation
摘要
Abstract
In the installation process of five-axis gantry machining center,the machine bed's deformation,resulting from pre-loading force in anchor bolts installation,will affect the geometric accuracy of gantry machining center,and the stress distribution characteristics will affect the gantry machining center's accuracy maintenance.Based on the analysis of the bolt pre-loading model,the step pre-loading method of the anchor bolts is proposed,and the method is based on the minimum deformation installation error and the uniform pressure distribution of the bolts.And how these factors,including pre-loading order,pre-loading steps' number and pre-loading steps' ratio,influence the geometrical accuracy of rail mounting surface,uniformity of the pressure distribution and precision retention of the gantry machining center are analyzed quantitatively.The simulation results show that the present method can realize fast and effective installation of the anchor bolts in five-axis gantry machining center,and it can also solve the problem that the traditional experience method's installation efficiency is low and its accuracy is difficult to guarantee.关键词
龙门加工中心/地脚螺栓/分步预紧/预紧力Key words
gantry machining center/anchor bolts/pre-loading in steps/pre-loading force分类
机械制造引用本文复制引用
王先根,张建润..龙门加工中心地脚螺栓组分步预紧工艺研究[J].机械科学与技术,2018,37(6):839-847,9.基金项目
江苏省科技支撑重点项目(BE2014004-3)资助 （BE2014004-3）
