基于类等势场法和模型的锻件预制坯设计

发布时间：2018-04-03 09:14

  本文选题：齿轮锻件　切入点：等势场　出处：《中南大学学报(自然科学版)》2015年03期

【摘要】：利用塑性变形过程中金属的流动规律与静电场等势线分布类似这一特性,提出一种预制坯设计的新方法—类等势场法,并采用此方法对某齿轮锻件进行预成形设计。利用ANSYS软件得出预制坯形状,以此形状为局部变量,以压机速度、摩擦因数、温度为全局变量,以成形载荷、填充率、晶粒尺寸为优化目标,利用有限元软件DEFORM-3D进行数值模拟,并采用Matlab软件中的MBC(model-based calibration)工具箱对其进行数学建模及优化,最后在预锻工艺参数不变的条件下,得到终锻的最佳工艺参数组合是等势线ξ为0.205 V时的预制坯形状及压机速度为56 mm/s、摩擦因数为0.2、温度为1 000℃。生产实践表明:该方法设计的齿轮与传统方法相比,终锻成形载荷下降40%,材料利用率提高56.7%,而且组织得到细化。
[Abstract]:Taking advantage of the fact that the flow law of metal during plastic deformation is similar to the distribution of electrostatic field isopotential line, a new method of preform billet design is put forward, which is used to preform a gear forging.The shape of preform billet is obtained by using ANSYS software. The shape is taken as local variable, the speed, friction coefficient and temperature of press are taken as global variables, the forming load, filling rate and grain size are taken as the optimization objective, and the finite element software DEFORM-3D is used to simulate the preform shape.MBC(model-based calibration toolbox in Matlab software is used to model and optimize it. Finally, under the condition of constant pre-forging process parameters,The optimum process parameters of final forging are obtained as follows: the shape of preform and press speed is 56 mm / s, friction coefficient is 0.2, temperature is 1 000 鈩，

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