零件固定约束对喷丸成形结果的影响

doi:10.3901/JME.2022.12.103

机械工程学报 ›› 2022, Vol. 58 ›› Issue (12): 103-110.doi: 10.3901/JME.2022.12.103

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零件固定约束对喷丸成形结果的影响

肖旭东¹, 张博伦¹, 乔丹¹, 杨明顺¹, 高天宇²

1. 西安理工大学机械与精密仪器工程学院西安 710048;
2. 上海无线电设备研究所上海 200090

收稿日期:2021-08-08 修回日期:2021-12-23 出版日期:2022-06-20 发布日期:2022-09-14
通讯作者: 肖旭东(通信作者),男,1986年出生,博士,副教授,硕士研究生导师。主要研究方向为喷丸成形及表面形变强化。E-mail:xiaoxd@xaut.edu.cn
基金资助:
国家自然科学基金（51805432）和中国博士后科学基金（2018M633541）资助项目

Influence of Fixed Constraint of Component on Peen Forming Deformation

XIAO Xudong¹, ZHANG Bolun¹, QIAO Dan¹, YANG Mingshun¹, GAO Tianyu²

1. School of Mechanical and Instrument Engineering, Xi'an University of Technology, Xi'an 710048;
2. Shanghai Radio Equipment Research Institute, Shanghai 200090

Received:2021-08-08 Revised:2021-12-23 Online:2022-06-20 Published:2022-09-14

摘要/Abstract

摘要： 喷丸成形工艺包含较多控制参数，零件的固定约束方式和强度往往被忽视，导致喷丸成形结果预测不准或成形结果不稳定。经典喷丸变形分析理论是在强固定约束条件下建立的，而喷丸成形中因零件尺寸较大、约束强度较低或约束方式及位置变化，使得喷丸成形工艺实际上是在弱固定约束条件下完成。分析了完全固定约束和自由约束两种极限状态、以及弱固定约束状态下喷丸应力场、成形曲率及延展应变的演化机理，提出弱固定约束条件下分阶段分析喷丸成形过程的方法，引入固定约束释放间歇次数J等效表征固定约束强度。完全固定约束时J值为1，自由约束时J值趋于无穷大，固定约束强度越低，J值越大。结果表明，J值增大，喷丸残余应力、成形曲率和延展应变增大，分析方法及结果对喷丸成形工艺参数规划和成形结果预测具有极大的指导意义和参考价值。

关键词: 喷丸成形, 固定约束, 应力场, 成形曲率

Abstract: Many controlling parameters are involved in shot peen forming, but fixed constraint of component is usually neglected, resulting in the deviation and instability of peen forming curvatures and elongation. The classical analysis of peen forming is based on the condition that the component is totally fixed in peening process. However, since the large size of peen forming component, and the weakness or the change of fixed constraint, the actual peening forming is performed under weak fixed constraint. Under both critical conditions:total fixation and free fixation, the evolution of peening stress, forming curvature and elongation are analyzed. A method is proposed that the peening process is separated into several stages by introducing a parameter J to equivalently represent the actual weak fixed condition. For the total fixation, J is 1. For the free fixation, J approaches infinity. With the reduction of fixation strength, J increases. The results indicate that peening residual stress, forming curvature and elongation increase with the value of J. The proposed method and obtained results can promote the design of peen forming parameters and the accuracy of forming effects prediction.

Key words: peen forming, fixed constraint, stress field, forming curvature

中图分类号:

TG30

肖旭东, 张博伦, 乔丹, 杨明顺, 高天宇. 零件固定约束对喷丸成形结果的影响[J]. 机械工程学报, 2022, 58(12): 103-110.

XIAO Xudong, ZHANG Bolun, QIAO Dan, YANG Mingshun, GAO Tianyu. Influence of Fixed Constraint of Component on Peen Forming Deformation[J]. Journal of Mechanical Engineering, 2022, 58(12): 103-110.

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零件固定约束对喷丸成形结果的影响

Influence of Fixed Constraint of Component on Peen Forming Deformation

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