锻压技术

基于能量等效的预应力喷丸弯曲变形行为

英文标题：Bending deformation behavior on pre-stressed shot peening based on energy equivalence

作者：王桐王万礼徐潇杰石金珂杨倩张挺杨毅

关键词：2024铝合金喷丸成形预应力能量等效薄板弯曲

分类号：V261.7

出版年,卷(期):页码：2025,50(7):74-81

摘要：

鉴于预应力喷丸成形过程涉及复杂的弹塑性变形，难以直接建立喷丸参数与零件变形响应之间的映射关系。从能量等效的角度对预应力喷丸变形行为进行研究，建立了平板试件的喷丸弯曲变形计算模型。在该模型中，受喷板件的变形能量由弹丸撞击输入的总动能和修正系数决定，其中修正系数综合考虑了实际成形过程中斜向撞击、弹丸相互作用和弹丸重叠的影响。研究结果表明：受喷板件的曲率半径的平方分别与弹痕覆盖率和单个喷丸的平均输入能量成反比；此外，预应力越大，弹丸输入的动能中转化为板件变形能的比例越大，相应地曲率半径也越大。研究结果可进一步用于指导实际大型薄壁零件的成形制造。

For the problems that the pre-stressed shot peening forming process involved complex elastic-plastic deformation,and it was difficult to directly establish the mapping relationship between shot peening parameters and deformation response of parts, the deformation behavior of pre-stress shot peening was investigated from the perspective of energy equivalence, and a shot peening bending deformation calculation model for flat specimen was established. In this model, the deformation energy of shot-peened plate was determined by the total kinetic energy input by the shot impact and the correction coefficient, which comprehensively considered the influence of oblique impact, shot interaction and shot overlap in the actual forming process. The results show that the square of curvature radius for shot-peened plate is inversely proportional to the dent coverage ratin and the average input energy of individual peening shot. In addition, the greater the pre-stress, the greater the proportion of the kinetic energy input by the shot that is converted into plate deformation energy, and the correspondingly larger the curvature radius. Thus, the research findings can be further used to guide the actual forming and manufacturing of large thin-walled parts.

基金项目：

作者简介：王桐（1989-），男，博士，工程师 E-mail：1013956651@qq.com

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