艾条定量卷制机的预成型技术研究

Research on Preforming Technology of MOXA Rolling Machine

艾条定量误差是影响卷条机的合格率和产量的关键。将减小艾条的定量误差为设计目标,首先分析椭圆辊和圆辊成型方式对艾条定量误差的影响程度,知圆辊机构能使艾条定量误差更小,因此将圆辊作为艾绒辊压成型机构;其次重点研究圆辊成型对预成型后艾条强度和艾条产量的影响参数,基于对辊数学模型分析得圆辊半径和模腔个数对强度和产量有影响;然后利用workbench对不同半径和模腔个数的对辊机构进行静力学分析,结合加工成本、相邻模腔的强度以及生产产量等因素,得到最佳的参数分别为圆辊半径25.5 mm和模腔个数5个;最后通过定量实验验证最佳参数的合理性,并得到预成型机构能满足艾条定量误差5%、合格率94%和日产量达100 kg以上的指标。

The quantitative error of moxa stick is the key to affect the passing rate and production capacity of the winder.Reducing the quantitative error of moxa sticks is a design goal.Firstly,this essay analyzed how the elliptical roller and round roll forming methods influence on the quantitative error of moxa sticks.The round roller mechanism could make the quantitative error of moxa sticks smaller.Therefore,the round roller was used as moxa Pile roller forming machine;Secondly this essay focused on the influence factors that affect the strength of the moxa sticks and the output of moxa sticks after preforming.Based on the analysis of the mathematical model of the counter roll,it was obtained that the radius and number of cavities of the round roll had an influence on the strength and output;Then using workbench to carry out static analysis of the roller mechanism with different shaft diameters R and the number of mold cavities N,combined with the consideration of processing cost,the strength of the adjacent mold cavities and production capacity and other factors,obtained the best factors of R and N were 25.5mm and 5 respectively.Finally,the rationality of the best factor was verified by quantitative experiments,and knowing the preforming mechanism could also meet the requirements of moxa quantitative error of 5%,passing rate of 94%,and production capacity of 100kg or more per day.