中国舰船研究2025，Vol.20Issue(2)：299-307,9.DOI:10.19693/j.issn.1673-3185.03497
高强钢薄板切割变形的机理研究及预控分析
Mechanism analysis of cutting distortion of thin plate with high tensile strength steel for its prediction and control
摘要
Abstract
[Objective]In order to effectively control flame cutting precision of thin plate with high tensile strength steel,Generation mechanism of out-of-plane buckling distortion and in-plane bending distortion were investigated,and processing with dynamic heating was proposed to reduce flame cutting distortion.[Method]Using Q550 plate with thickness of 3 mm as research object,out-of-plane buckling and in-plane bending dis-tortion of examined cutting specimen were observed by means of flame cutting experiment and 3-dimensional measurement.By thermal elastic plastic FE computation with large deformation,thermomechanical response during flame cutting of Q550 thin plate was examined,and influence of additional heating on flame cutting distortion of thin plate with high tensile strength steel was also considered.[Results]Both distortion tendency and magnitude of predicted results are in excellent agreement with measured data.In addition,heat-ing the region away from flame cutting can reduce buckling distortion about 90%and in-plane bending distor-tion by 40%.[Conclusions]Based on the generation mechanism of cutting distortion,assisted flame heat-ing with different processing was proposed and applied to improve the cutting accuracy with flame;further-more,with thermal elastic plastic FE computation,optimal processing to reduce flame cutting distortion was proposed for high-precision fabrication of thin plate with high tensile strength steel.关键词
薄板切割变形/热-弹-塑性有限元计算/辅助加热工艺/反向弯曲力矩/纵向收缩力/有限元法Key words
cutting distortion of thin plate/TEP FE computation/auxiliary heating process/inverse bending moment/longitudinal shrinkage force/finite element method分类
交通运输引用本文复制引用
王江超,杜仕忠,陈相飞,牛业兴,杨洋,赵宏权,吴磊..高强钢薄板切割变形的机理研究及预控分析[J].中国舰船研究,2025,20(2):299-307,9.基金项目
工信部高技术船舶资助项目(工信部装函[2019]331号) （工信部装函[2019]331号）
