自适应橡胶树干外形抱紧装置模型构建与拓扑优化

doi:DOI: 10.13733/j.jcam.issn.2095-5553.2024.05.005

摘要/Abstract

摘要： 针对天然橡胶全自动采胶装备的运动作业形式，设计一种可实现橡胶树干自适应包络夹持的抱紧装置，对该装置的工作原理、组成结构、抓取模式和自适应包络抓取特性等方面进行阐述与分析，为优化抱紧装置的设计提供依据。采用ANSYS workbench软件进行有限元分析，结果显示：实际工况下抱紧装置的最大总形变量为0.01 m，其发生在柔性导轨前端，各形变量均较小且与抱紧装置实际受力情况相符；所受最大应力为0.45 MPa，应力集中在柔性导轨与支撑板连接处。但其存在较大的材料冗余，对抱紧装置进行拓扑优化，按照30%、40%、50%、70%的材料去除率分别计算，结构优化后的质量由0.53 kg降至0.39 kg，结果表明，在保障强度与刚度的要求下，降低抱紧装置材料冗余量，可满足作业需求。并对抱紧装置的样机开展定性和定量测试试验，通过反馈数据进行分析，得出抓取模式的受力情况，夹持效果较好。

关键词: 橡胶树干, 包络夹持, 抱紧装置, 拓扑优化

Abstract: Aiming at the moving operation form of automatic rubber extraction equipment of natural rubber, a kind of holding device which can realize the adaptive envelope holding of rubber trunk was designed. The working principle, composition structure, grasping mode and adaptive envelope grabbing characteristics of the device were described and analyzed, providing basis for optimizing the design of holding device. ANSYS Workbench software was used for finite element analysis, and the results showed that the maximum total shape variable of the holding device was 0.01 m in the actual working condition, which occurred at the front end of the flexible guide rail, and all the shape variables were small and consistent with the actual force of the holding device. The maximum stress was 0.45 MPa, and the stress was concentrated at the connection between the flexible guide rail and the support plate. However, it had a large material redundancy. The topological optimization of the holding device was carried out, and the mass of the optimized structure was reduced from 0.53 kg to 0.39 kg according to the material removal rates of 30%, 40%, 50% and 70%, respectively. The results showed that the reduction of material redundancy of the holding device could meet the operation requirements under the requirements of ensuring the strength and stiffness. Qualitative and quantitative tests were carried out on the prototype of the holding device, and through the analysis of feedback data, the force situation of the grasping mode was obtained, and the clamping effect was good.

Key words: rubber trunk, envelope clamping, holding device, topology optimization

中图分类号:

S794.1

肖苏伟, 曹建华, 陈娃容, 贾倩, 吴思浩, 邓祥丰, . 自适应橡胶树干外形抱紧装置模型构建与拓扑优化[J]. 中国农机化学报, 2024, 45(5): 29-35.

Xiao Suwei, , Cao Jianhua, , Chen Warong, , Jia Qian, , Wu Sihao, , Deng Xiangfeng, . Model construction and topology optimization of adaptive rubber trunk contour holding device[J]. Journal of Chinese Agricultural Mechanization, 2024, 45(5): 29-35.

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