Multi-Tooth Cutting Method and Bionic Cutter Design for Broccoli Xylem ( Brassica oleracea L. var. Italica Plenck)

Yunlong Cao, Yao Yu, Zhong Tang (), Yunfei Zhao, Xinyang Gu, Sifan Liu and Shuren Chen
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Yunlong Cao: School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Yao Yu: School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Zhong Tang: School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Yunfei Zhao: School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Xinyang Gu: School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Sifan Liu: School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Shuren Chen: School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China

Agriculture, 2023, vol. 13, issue 6, 1-25

Abstract: During the harvesting of cut-stem vegetables, the structural parameters of cutters have an important influence on the harvesting effect. Structural parameters of stalks directly affect the cutting effect of the cutter. The thickness of the stalk xylem has a strong influence on the cutting stability and cutting surface effect of the cutter. In this paper, the effect of the broccoli stalk xylem on conventional toothless cutters was investigated using broccoli stalks as the cutting object. It was found that a thicker xylem leads to shear force fluctuations, which in turn affects the smooth operation of the cutting device. Taking locust mouthparts as the research object, a bionic multi-tooth cutting method is proposed in this paper to obtain the contour curve based on the locust upper jaw cutting tooth lobe. By establishing the regression equation, the contour curve of the cutting teeth is fitted accurately. The cutter edge is designed with the locust’s maxillary incisive lobe as the bionic object. ANSYS software was used to simulate the cutting of a double disc cutter and broccoli stalk. The effect of each factor was analyzed by response-surface regression to determine the optimal cutter speed, machine forward speed, cutting inclination, blade overlap, and optimal cutting position. The cutting test is verified via broccoli stalks and a cutting test bench to further determine the cutting device operating parameters. The optimal operating parameters of the cutting device were 0.239 m/s forward speed, 30.974-degree cutting edge angle, 10.066 mm blade overlap, and 467.511 rpm.

Keywords: broccoli stem; cutting device; bionic method; locust mandibular incisor (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: 2023
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