论文部分内容阅读
为了研究两道次渐进成形的表面质量,采用响应面法来分析和优化两道次渐进成形的整体表面粗糙度.首先,通过Box-Behnken设计方法制定以成形角α、道次间隔角度Δα、层间距Δz和进给速度V为主要研究参数的试验计划.其次,建立了四个工艺参数与成形件表面粗糙度间的数值模型,并结合实验与方差分析(ANOVA)验证了数学模型的准确性.然后,利用数值模型探讨四个参数及其相互作用对表面粗糙度的影响情况.最终得出:层间距、道次间隔角度、成形角及进给速度对表面粗糙度的影响依次减弱.当V增加时,粗糙度值先减小再呈增加趋势;当Δz,Δα和α增加时,表面粗糙度值随之增加.此外,通过优化提出了获得最优表面质量的参数组合,并通过实验验证了这组参数组合的优越性.
In order to study the surface quality of two-step progressive forming, response surface method was used to analyze and optimize the overall surface roughness of two-step progressive forming.First, the forming angle α, the interval angle Δα, Layer spacing Δz and feed speed V as the main research parameters.Secondly, a numerical model of the four process parameters and the surface roughness of the formed part was established, and the accuracy of the mathematical model was verified by the experimental and variance analysis (ANOVA) Then, the influence of four parameters and their interaction on the surface roughness is discussed by using numerical model.Finally, the influence of layer spacing, spacing, forming angle and feed rate on the surface roughness is reduced in turn. When V increases, the roughness value decreases first and then increases, and when Δz, Δα and α increase, the surface roughness value increases.Furthermore, a parameter combination for obtaining the optimal surface quality is proposed and optimized by The experimental results show the superiority of this combination of parameters.