Study on the Dynamic Cutting Mechanism of Green Pepper ( Zanthoxylum armatum ) Branches under Optimal Tool Parameters

Yexin Li, Binjie Li, Yiyao Jiang, Chengrui Xu, Baidong Zhou, Qi Niu and Chengsong Li ()
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Yexin Li: College of Engineering and Technology, Southwest University, Chongqing 400715, China
Binjie Li: College of Engineering and Technology, Southwest University, Chongqing 400715, China
Yiyao Jiang: College of Engineering and Technology, Southwest University, Chongqing 400715, China
Chengrui Xu: College of Engineering and Technology, Southwest University, Chongqing 400715, China
Baidong Zhou: College of Engineering and Technology, Southwest University, Chongqing 400715, China
Qi Niu: College of Engineering and Technology, Southwest University, Chongqing 400715, China
Chengsong Li: College of Engineering and Technology, Southwest University, Chongqing 400715, China

Agriculture, 2022, vol. 12, issue 8, 1-22

Abstract: In order to design a branch-cutting type green pepper harvesting device, we firstly study the whole process of straight knife green pepper cutting to reveal the cutting mechanism and provide theoretical guidance to the design. A finite element model was established for the cutting of pepper branches across the distance, and single-factor and multi-factor finite element simulation tests were conducted on the knife feed angle, tool edge angle, and knife feed speed of the working parts of the pepper cutting and harvesting device. The results of the experiment were analyzed by ANOVA, which showed the different degrees of importance of these factors, and the optimal parameters were obtained by response surface methodology (RSM). With the optimal parameters selected, the predicted maximum cutting force and cutting completion were 803.35 N and 98.58%, respectively, this satisfies the efficiency and economy requirements of agricultural machinery design. In addition, the cutting force of green pepper branches was analyzed and a theoretical mechanical model was developed to help us understand the variation of cutting force numerically. The stress–strain system, high-speed photography system and numerical prediction were innovatively combined to observe and measure the stress and other key state variables in the cutting process in detail, summarize their changing trend, and establish a time-based monitoring and comparison model. The above research results can provide a reference for the design of green pepper branch cutting and harvesting devices, such as direct guidance on the selection of working parameters, materials, etc., and guidance on the operation in actual work.

Keywords: green pepper branches; response surface parameter optimization; monitoring comparison model; mechanism revealing (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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