基于多项式拟合算法的重型电动数控螺旋压力机机身的轻量化

Lightweight on heavy-duty electric CNC screw press body based on polynomial fitting algorithm

螺旋压力机的结构与刚度的关系一直是锻压装备设计时的重要参考,通常采用计算许用应力得到的机械结构,其刚度足够但设备笨重。针对此问题,建立EP-10000的参数化模型并进行尺寸改动,并利用ANSYS对模型进行受力分析,得到不同尺寸的压力机在100 MN工作状态下的刚度及变形数值。运用多项式拟合优化算法,建立变形和整机长度与宽度、立柱宽度之间的数学模型。得到在100 MN工作状态下,最小变形量为0.89873 mm,此时对应的整机尺寸为6700 mm×4126 mm×11385 mm,立柱宽度为3400 mm,整机减重约7.9%,并且在此尺寸下强度为75 MPa,满足需求。结果表明,该方法可以得到高刚度、轻量化的压力机机身。

The relationship between structure and stiffness of screw press has always been an important reference in the design of forging equipment.Generally,the mechanical structure obtained by calculating the allowable stress was used,which has sufficient stiffness but bulky equipment.To solve this problem,a parameterized model of EP-10000 was established and its dimensions were changed.The force analysis of the model was carried out by ANSYS,and the stiffness and deformation values of presses with different sizes were obtained under the working condition of 100 MN.Polynomial fitting optimization algorithm was used to establish the mathematical models between the deformation and the length and width of the whole machine and the column width,and under the working condition of 100 MN,the minimum deformation was 0.89873 mm.At this time,the corresponding size of the whole machine was 6700 mm×4126 mm×11385 mm,the column width was 3400 mm,the weight of the whole machine was reduced by about 7.9%,and the strength under this size was 75 MPa,which met the demand.The results show that the high stiffness and lightweight press body can be obtained by this method.