激光切割机横梁蠕变行为对加工精度影响分析  

Analysis of the influence of creep behavior of laser cutting machine beam on processing accuracy

作　　者：张宇 林毓培[2] 舒雷 李涛 王昊 ZHANG Yu;LIN Yupei;SHU Lei;LI Tao;WANG Hao(School of Intelligent Manufacturing and Automotive,Chongqing Electronic Engineering Vocational College,Chongqing 401331,CHN;National and Local Joint Engineering Laboratory of Intelligent Transmission and Control Technology,Southwest University,Chongqing 400716,CHN)

机构地区：[1]重庆电子工程职业学院智能制造与汽车学院,重庆401331 [2]西南大学智能传动和控制技术国家地方联合工程实验室,重庆400716

出　　处：《制造技术与机床》2024年第8期62-67,共6页Manufacturing Technology & Machine Tool

基　　金：重庆市教育委员会科学技术研究技术青年基金资助项目(KJQN202303109)。

摘　　要：激光切割机每使用一段时间就需要重新进行加工精度校准,大大降低了使用效率和经济性。针对这一问题开展横梁蠕变行为对加工精度影响分析。首先,基于乌曼斯基薄壁梁约束扭转理论,建立了横梁导轨-滑块-激光发射孔蠕变理论计算简化模型。其次,采用有限元软件对横梁蠕变行为仿真计算,结合理论计算数据研究了激光发射孔x、z方向的蠕变机理。再次,获知激光发射孔x方向蠕变量对加工稳定性起主导作用,并且横梁板厚和截面形状是关乎其性能的主要参数。最后,通过优化横梁截面参数δ(s)和ρ(s),增加了Ω^(2)/J_(d)值,从而提高了横梁抗蠕变性能。研究有助于提高激光切割机长期工作时的加工稳定性,具有良好的工程应用价值。The laser cutting machine needs to be re-calibrated for processing accuracy when it is used for some time,which greatly reduces the use efficiency and economical efficiency.To solve this problem,the influence of the creep behavior of the beam for machining accuracy is analyzed.Firstly,based on the Wumansky theory about constrained torsion of thin-walled beam,a simplified model for theory calculating the creep of beam guideway-slider-laser emission hole is established.Secondly,the finite element software is used to simulate the creep behavior of the beam,and the creep mechanism of the laser emission hole in the x and z directions is studied by combining the theoretical calculation data.Then,it is found that the x-direction creep of the laser emission hole plays a leading role in processing stability,and the thickness and section shape of the beam are the main parameters related to itsδ(s)ρ(s)performance.Finally,by optimizing the cross section parameters and of the beam and Ω^(2)/J_(d)increasing the values,the creep resistance of the beam is improved.The above research is helpful to improve the processing stability of laser cutting machine in long-term operation,and has good engineering application value.

关 键 词：激光切割机 加工精度 蠕变 横梁截面参数 

分 类 号：TH122[机械工程—机械设计及理论]