基于ADAMS的肘杆式机械压力机传动机构的运动仿真及优化分析

发布时间：2018-03-07 12:55

本文选题：ADAMS　切入点：机械压力机　出处：《延边大学》2017年硕士论文　论文类型：学位论文

【摘要】：机械压力机被广泛应用于汽车、电子、军工、航空航天等重要的工业领域,尤其是近年来随着汽车行业的飞速发展及生产规模化,压力机更是成为汽车生产过程中应用于冲压、拉深、落料等工艺不可缺少的锻压装备。而随着科学技术的发展以及工业技术水平的不断提高,传统的曲柄连杆式压力机由于其较低的冲压精度及加工效率,已经不能很好地满足冲压市场越来越高的生产需求。因此肘杆式机械压力机由于其急回特性好、增力效果明显等特点,已经越来越多的被应用到锻压领域中。所以提高被广泛应用到工业生产锻压领域中的机械压力机的工作性能已经显得至关重要。机械压力机内部的传动机构是压力机的核心部分,机构参数设计不合理等因素都会影响压力机的各项工作性能,进而影响到产品的质量。针对上述问题,本文提出了利用ADAMS软件对肘杆式机械压力机的虚拟样机模型进行运动学参数化仿真分析,并对机构模型进行了多目标的优化设计,最终提升了肘杆式机械压力机传动机构的综合工作性能,从而提高被冲压工件的质量。目前国内外学者大多利用Matlab或ADAMS软件对肘杆式机械压力机进行仿真和优化分析,研究证明了肘杆式压力机的传动机构具有很好的急回特性,且增力效果明显。本文是在国内外学者的研究基础上,首先阐述了机械压力机的分类及运动特性,介绍了目前国内外学者对于相关领域的研究现状,并以肘杆式机械压力机为研究对象,对压力机的传动机构进行了运动学分析及机构基础尺寸的求解分析;然后利用ADAMS软件对机构进行了参数化虚拟样机建模,验证了机构模型参数化坐标的正确性并成功地进行了模型自检,之后通过运动学仿真分析研究了滑块的各项特性曲线对机构性能的影响;为了提高机构运动的平稳性,提升冲压质量及延长模具的使用寿命,通过创建设计变量,建立约束函数和目标函数,提出了以减小机构工作过程中滑块的速度波动量、降低工作过程中的最大压力角和减小滑块的加速度峰值为目标的多目标优化设计,并利用ADAMS/Insight试验优化模块对机构模型进行了优化计算分析,得到了综合工作性能更好的传动机构设计参数。通过对优化前后的机构模型进行最终仿真分析,对比优化前后滑块的各项特性曲线,仿真结果表明机构的综合工作性能明显提升。本文为肘杆式机械压力机传动机构的运动仿真及优化分析提供了一定的理论依据。
[Abstract]:Mechanical presses are widely used in automotive, electronic, military, aerospace and other important industrial fields, especially in recent years, with the rapid development of automobile industry and production scale, press is used in the process of automobile production. Drawing, blanking and other indispensable forging equipment. With the development of science and technology and the continuous improvement of industrial technology, the traditional crank and connecting rod press is due to its low stamping accuracy and processing efficiency. It has not been able to meet the higher and higher production demand of the stamping market. Therefore, the elbow bar mechanical press has the characteristics of good quick return characteristic and obvious force increasing effect, etc. It is very important to improve the working performance of mechanical press which is widely used in the field of industrial production and forging. The internal transmission mechanism of mechanical press is press. The core of the machine, The unreasonable design of the mechanical parameters will affect the performance of the press and then affect the quality of the product. In this paper, the kinematics parameterized simulation analysis of the virtual prototype model of the elbow bar mechanical press is presented by using ADAMS software, and the multi-objective optimization design of the mechanism model is carried out. Finally, the comprehensive working performance of the transmission mechanism of the elbow bar mechanical press is improved, thus improving the quality of the punched workpiece. At present, most scholars at home and abroad use Matlab or ADAMS software to simulate and optimize the elbow bar mechanical press. The research has proved that the transmission mechanism of the elbow press has good quick return characteristic, and the effect of increasing force is obvious. Based on the research of domestic and foreign scholars, the classification and motion characteristics of mechanical press are first expounded in this paper. This paper introduces the current research situation of domestic and foreign scholars on the related fields, and takes the elbow bar mechanical press as the research object, carries on the kinematics analysis and the mechanism basic size solution analysis to the press transmission mechanism; Then the parameterized virtual prototype model of the mechanism is built by using ADAMS software, which verifies the correctness of the parameterized coordinate of the mechanism model and successfully carries out the self-checking of the model. In order to improve the stability of the mechanism, improve the stamping quality and prolong the service life of the die, the design variables are created, and the influence of the characteristic curve of the slider on the performance of the mechanism is studied by kinematics simulation. The constraint function and the objective function are established, and a multi-objective optimization design is proposed, which aims at reducing the velocity fluctuation of the slider, reducing the maximum pressure angle and reducing the peak acceleration of the slider. The optimal calculation and analysis of the mechanism model are carried out by using the ADAMS/Insight test optimization module, and the design parameters of the transmission mechanism with better comprehensive working performance are obtained. Finally, the simulation analysis of the mechanism model before and after the optimization is carried out. Compared with the characteristic curves of the slider before and after optimization, the simulation results show that the comprehensive working performance of the mechanism is obviously improved. This paper provides a certain theoretical basis for the motion simulation and optimization analysis of the transmission mechanism of the mechanical press with elbow bar.
【学位授予单位】：延边大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG315

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