锻压技术

锻造操作机液压缓冲装置的性能研究

英文标题：Study on performance of hydraulic buffer device for forging manipulator

分类号：TG315

出版年,卷(期):页码：2023,48(9):142-148

摘要：

介绍了锻造操作机常用的液压缓冲装置的结构特点和缓冲原理。根据流量连续性方程和伯努利方程，结合双向缓冲缸与蓄能器的受力变化，得到了双向缓冲缸在任意时刻所受外部载荷的关系式，将液压缓冲装置简化为刚度-阻尼系统，并通过微分求导获得了缓冲装置的动态刚度、动态阻尼的数学模型，再通过Matlab对蓄能器初始充气压力和初始充气容积、缓冲缸行程对缓冲装置刚度的影响，以及缓冲缸油腔环形横截面面积、阻尼孔横截面面积对阻尼的影响进行分析。最后，基于遗传算法对缓冲装置中蓄能器的初始充气容积和初始充气压力进行优化，得到一组Pareto非劣解集，并基于理想解排序方法对Pareto非劣解集进行优化处理，得到最佳的缓冲装置中蓄能器的初始充气压力及初始充气容积的匹配方案。

The structural characteristics and buffering principle of hydraulic buffer device commonly used in forging manipulator were introduced, and according to the flow continuity equation and Bernoulli equation, combined with the force changes of two-way buffer cylinder and accumulator, the relationship for the external loads of the two-way buffer cylinder at any time was obtained. Then, the hydraulic buffer device was simplified into a stiffness-damping system, and the mathematical model of dynamic stiffness and dynamic damping for buffer device was obtained through differential derivation. Furthermore, the influences of initial inflated pressure and initial inflated volume of accumulator and stroke of buffer cylinder on the stiffness of buffer device, and the influence of oil chamber ring-shaped cross-sectional area of buffer cylinder and cross-sectional area of damping hole on the damping were analyzed by Matlab. Finally, based on genetic algorithm (GA), the initial inflated volume and the initial inflated pressure of accumulator in the buffer device were optimized to obtain a group of Pareto non-inferior solution set, and the Pareto non-inferior solution set was optimized based on the ideal solution sorting method to obtain the best matching scheme of the initial inflated pressure and the initial inflated volume of accumulator for the buffer device.

基金项目：

高性能复杂制造国家重点实验室资助项目（Kfkt2002-02)

作者简介：陈柯杰（1997-），男，硕士研究生 E-mail：2622043178@qq.com 通信作者：刘艳妍（1964-），女，学士，教授，硕士研究生导师 E-mail：liuyy@mail.lzjtu.cn

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