郑兆启,李树君,马季威,王冰,李超,崔亮.果蔬包装机凸轮连杆式切断机构运动分析与优化[J].农业机械学报,2016,47(s1):374-379.
Zheng Zhaoqi,Li Shujun,Ma Jiwei,Wang Bing,Li Chao,Cui Liang.Motion Analysis and Optimization on Cam-link Cutting Mechanism of Fruit-vegetable Packaging Machine[J].Transactions of the Chinese Society for Agricultural Machinery,2016,47(s1):374-379.
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果蔬包装机凸轮连杆式切断机构运动分析与优化   [下载全文]
Motion Analysis and Optimization on Cam-link Cutting Mechanism of Fruit-vegetable Packaging Machine   [Download Pdf][in English]
投稿时间:2016-07-20  
DOI:10.6041/j.issn.1000-1298.2016.S0.057
中文关键词:  果蔬包装机  凸轮连杆  切断机构  运动分析  优化
基金项目:“十二五”国家科技支撑计划项目(2014BAD04B02)和北京市科技计划项目(Z151100001015010)
作者单位
郑兆启 中国农业大学 
李树君 中国机械工业集团有限公司 
马季威 中国农业机械化科学研究院 
王冰 中国农业机械化科学研究院
中国包装和食品机械有限公司 
李超 中国农业大学 
崔亮 中国农业机械化科学研究院 
中文摘要:针对目前果蔬包装机中存在切刀刮膜和切口不正等问题,提出了一种基于连杆机构和凸轮机构的果蔬包装机切断机构。建立了切断机构的运动数学模型,并以此为依据建立了切断机构基于ADAMS的参数化模型,得到该机构主要参数变化对机构运动的影响规律。通过二次规划算法优化分析计算,得出一组最优参数组合。利用此参数组合的运动学仿真分析表明,下切刀的加速度最大值为7.971mm/s2,切割距离为20.4mm。根据优化结果加工组装试验样机,以PVC膜切断率为主要检测指标对该试验样机进行试验,结果表明,对11、12、13μm 3种厚度的PVC保鲜膜切断率都在98%以上,切断机构满足果蔬包装机作业要求。
Zheng Zhaoqi  Li Shujun  Ma Jiwei  Wang Bing  Li Chao  Cui Liang
China Agricultural University,China National Machinery Industry Corporation,Chinese Academy of Agricultural Mechanization Sciences,Chinese Academy of Agricultural Mechanization Sciences;China National Packaging and Food Machinery Corporation,China Agricultural University and Chinese Academy of Agricultural Mechanization Sciences
Key Words:fruit vegetable packaging machine  cam link  cutting mechanism  motion analysis  optimization
Abstract:Nowadays, aiming at the problems of packaging film scraping and incision deviation caused by the cutting mechanism in the fruit vegetable packaging machine, a cutting mechanism of fruit vegetable packaging machine based on the linkages and the cam mechanism was proposed. Firstly, the motion mathematical model of the cutting mechanism was established. Then, by using the virtual prototype of ADAMS, 〖JP3〗the parametric model of movement characteristics of cutting mechanism was completed according to these mathematic equations. And the influence of the main parameters of the mechanism on the movement of the mechanism were analyzed, including the link length of l1, l2, l3 and rise rotation angle β of the cam. Meanwhile, depending on the analysis method of sequential quadratic programming (SQP) algorithm, the optimal aggregative index could be obtained under the condition that l1 was 247mm, l2 was 154mm, and l4 was 1395mm. In this situation, the kinematic simulation analysis showed that the maximum value of acceleration of the lower cutter was 7.971mm/s2, and the cutting distance was 20.4mm. Finally, based on the above simulation and analysis, the prototype was processed with the optimized parameters. And the prototype test using the PVC film cutting rate as the main indexes was carried out. The results showed that the cutting rate was above 98% for the PVC film with thickness of 11μm, 12μm, 13μm, which indicated that the cutting mechanism could satisfy operation demand of the fruit vegetable packaging machine.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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