【摘要】 金属板料的激光冲击成形技术是利用高能激光诱导的高幅冲击波的力效应,而非热效应实现金属板料的塑性成形技术。对单次激光冲击下TA2板料的变形过程进行了理论分析,通过对激光冲击波载荷作用下板料变形过程的理论分析,建立了激光冲击板料变形的数学模型,得到了板料变形量与加工系统中各种参数之间的相互关系,为加工过程中各种参数的合理优化、板料变形过程的有效控制和实现大面积金属板料的激光冲击成形提供了理论依据。利用高功率钕玻璃激光冲击波装置,从影响板料变形的几个因素出发,选取了三种实验方案,对单次激光冲击下板料的理论变形量进行了实验验证。实验结果表明,依据本数学模型计算得到的理论变形量与实验实测数据较为接近,从而验证了用于计算单次激光冲击下板料变形理论的正确性和预测板料变形的实用性。更多还原

【Abstract】 Laser shock forming of metal sheet is a novel technique by applying a compressive shock wave on the surface of the metal.It is a mechanical not a thermal process.In this paper,the deformation of TA2 sheet has been analyzed under single-time laser shock loading.By the theoretical analysis,a mathematical model of sheet deformation has been constituted,the relationship between the sheet deformation and the various parameters such as laser energy,sheet thickness and so on has been discussed.This model can be used to optimize the manufacturing parameters,to effectively control sheet forming and can provide theoretical basis for carrying out the large-scale laser shock forming of metal sheet.Considering some factors of affecting sheet forming,three experimental projects have been actualized in virtue of the high-power Nd∶glass laser shock device.Experimental results show that the theoretical deformation amount is comparatively approximate to the experimental results,so the correctness and validity of the theory used to calculate the theoretical sheet-deformation amount under single-time laser shock loading have been validated.更多还原