Study on calculation of minimum laser energy of sheet metal deformation by laser shock forming
Study on calculation of minimum laser energy of sheet metal deformation by laser shock forming
复制标题
DOI：
--
复制
发表时间：
2006
期刊：
影响因子：
--
通讯作者：
Yang Chao-jun
中科院分区：
文献类型：
--
作者：
Yang Chao-jun
介绍了激光冲击变形的机理和冲击波产生的原因，提出了冲击波压力的估算公式，该公式揭示了冲击波峰值与覆盖层、能量吸收层、板料性能和激光参数的关系，并根据该公式和板料的拉伸屈服强度估算了变形所需的最小激光能量，结果表明，在板厚为0.5mm、凹模孔径为20mm、光束直径为6mm、脉冲宽度为25ns的条件下，不锈钢靶变形所需的最小脉冲能量约为11J，最小能量计算符合变形临界值，通过对最小激光能量的计算和变形实验的研究，为控制和预测板料的变形提供了准确的理论依据。
The mechanism of laser shock deformation and the reasons of producing the shock wave were introduced,and the estimated formula of shockwave pressure was put forward,which shows clearly the relation between the peak value of shockwave and the overlay,energy absorbed layer,sheet metal properties and laser parameters.Based on both the formula and the tensile yield strength of sheet metal,minimum laser energy needed by deformation was estimated,the results show that the lowest pulse energy needed by the target deformation of stainless steel is about 11 J under the conditions of sheet thickness of 0.5 mm,the bore diameter of cavity die of 20 mm,the beam diameter of 6 mm and the pulse width of 25 ns.The experimental results also show that minimum energy calculation accords with critical value of deformation,and the deformation increases with the increase of laser energy in a nonlinear way.By studying on the calculation of minimum laser energy and the deformation experiment,the paper provides exactly a theoretical foundation for controlling and predicting deformation of sheet metal.