Stamping process design and forming optimization of automobile front door stiffener plate
In view of the complex deformation,difficult control of material flow,forming cracking and other problems of the automobile front door stiffener plate,firstly,the structural characteristics of the automobile front door stiffener plate were analyzed,and the overall forming scheme of"one die and two pieces"was determined,and the forming processes of drawing forming,trimming-punching-shaping,trimming-side punching and side trimming-side punching-punching-cutting were designed in detail.Secondly,taking the material thinning rate as the starting point,numerical simulation was used to explore the influence laws of blank holder force,die clearance and stamping velocity on the forming quality of parts,and the position and degree of cracking for parts were predicted.The better process parameters were obtained:the blank holder force is controlled within 400 kN,the die clearance is not less than 1.10 mm,and the stamping velocity is not higher than 3000 mm·s-1.Fi-nally,the orthogonal test method was used to obtain the average values of the maximum thinning rate of each factor at each level,and the ranges of blank holder force,die clearance and stamping velocity are calculated to be 3.223％,1.489％and 0.763％,respectively.Based on the analysis results,the optimal process parameter combination of blank holder force of 300 kN,die clearance of 1.15 mm and stamping velocity of 3000 mm·s-1 was obtained,and the production test verification was carried out and qualified formed parts were produced.
front door stiffener plateprocess designthe maximum thinning ratedrawing dieorthogonal test
万方数据
维普
