Effects of cutter parameters on shearing stress for lettuce harvesting using a specially developed fixture

Cui, Yongjie; Wang, Wenqi; Wang, Minghui; Ma, Yidong; Fu, Longsheng

doi:10.25165/j.ijabe.20211404.6346

Cited by 5 publications

(5 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, as the oblique angle continued to increase, the cutting cross-sectional area on the root increased rapidly, resulting in an increase in cutting power consumption. This is consistent with the theory of Cui et al [14] and indicates that the cutting mechanical properties of little cabbage root and lettuce stem are similar, to a certain extent. The greater the cutting slip, the smaller the required cutting amount during cutting.…”

Section: Discussionsupporting

confidence: 92%

“…At this time, the cutting force curve decreased rapidly and nearly linearly until the cutting root was 0, forming stage III. The cutting force-displacement curve is a double-peak curve, which is consistent with the research of Cui et al [14], indicating that the change in cutting force on wooden stems is consistent to some extent.…”

Section: Cutting Force Displacement Curvesupporting

confidence: 91%

“…Cutting gap is another important factor that affects cutting force [13]. A study designed a shear fixture for cutting lettuce stems on a universal materials tester, and the results showed that the optimal cutting gap for a cutter design was 1.66 mm [14]. Therefore, according to the relevant literature, the relationship between the cutting mechanical properties of the plant and the physical structure of the stem, the structure, and the working parameters of the cutter can be studied through a texture analyzer or a specific experimental device with a mechanical sensor, and related parameters can be optimized.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experiment and Research on Cutting Mechanical Properties of Little Cabbage

Wang

Zhang

et al. 2022

Applied Sciences

View full text Add to dashboard Cite

To reduce the cutting force and cutting power consumption during harvest, the cutting mechanical properties of the root of little cabbage were studied. The cutting experiment was carried out using a texture analyzer, and the influence of the individual factors, the cutting bevel angle, the sliding angle, and the cutting gap on the maximum cutting stress and specific cutting energy were studied, respectively. On the basis of single factor experiments, multi-factor experiments were carried out using the central composite design scheme of the response surface method (RSM), and finally, the cutting parameters were optimized. The single factor test results showed that the maximum cutting stress and specific cutting energy first decreased and then increased with the increase in the cutting bevel angle, decreased with the increase in the sliding angle, and first dropped and then went up with the increase in the cutting gap. Response surface test results showed that the order of significance of factors affecting the maximum cutting stress of the root were the oblique angle, sliding angle, and cutting gap in sequence, and the order of the significance of factors affecting the specific cutting energy are cutting gap, oblique angle, and sliding angle. The interaction between the sliding angle and the cutting gap had a significant impact on the maximum cutting stress, and the interaction between the oblique angle and the cutting gap had a significant impact on the cutting energy. The optimal parameter combination is as follows: oblique angle of 9.1°, sliding angle of 30°, and cutting gap of 1.3 mm. At this time, the predicted maximum cutting stress was 7.43 × 104 Pa, and the specific cutting energy was 0.28 mJ mm−2. Finally, a verification experiment was carried out, and the errors of the predicted and measured values of cutting under the optimal parameter combination were 6.9% and 10.8%, respectively, showing that the cutting parameter optimization results were reliable. This research can provide data support for the design and improvement in the cutting device of the little cabbage combine harvester.

show abstract

Section: Discussionsupporting

confidence: 92%

Section: Cutting Force Displacement Curvesupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experiment and Research on Cutting Mechanical Properties of Little Cabbage

Wang

Zhang

et al. 2022

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…According to the Box-Behnken central composite design theory, the significance test and response surface analysis of four main parameters affecting the potato conveying speed, potato unearthing rate and damage rate are carried out (Wang et al, 2017a;Fu et al, 2018;Cui et al, 2021). 2, multiple regression fitting is carried out, using the data analysis software Design-Expert.13.…”

Section: Test Setup and Methodsmentioning

confidence: 99%

Test of the Screening and Parameter Optimization of Swing Separation Sieve in Field Operation

et al. 2022

View full text Add to dashboard Cite

The need for clarity regarding the sieving characteristics of the potato-soil mixture, as provided by the swing separating sieve of a potato digger, as well as the derived problems of low potato transportation efficiency, a high potato damage rate and low potato unearthing rate, are the main reasons for this study. Dynamic tracking technology is proposed to collect the motion state of potatoes, during the process of potato and soil separation. Considering the potato conveying speed, potato unearthing rate and potato damage rate as indicators, while the sieving parameters (crank rotational speed, sieve inclination, crank radius and swing direction angle) are the influencing factors, an orthogonal regression test is carried out, where the response surface is used to analyze each factor, its influence on the screening index, and to optimize it accordingly. The test results show that there is a linear relationship between the screening parameters and indexes, with each parameter showing different contribution rates to the screening indexes. The best parameter combination is the crank rotational speed of 190 r/min, sieve inclination of 9.7°, crank radius of 40 mm and swing direction angle of 18.8°. The corresponding potato conveying speed, unearthing rate and damage rate is 0.713 m/s, 98.7% and 3.224%, respectively. After optimization, the potato conveying speed is 1.43 times higher, the unearthing rate is increased by 2.5% and the damage rate is reduced by 60%. The research results can provide theoretical support to the structural design of potato diggers.

show abstract

“…Several attempts have been made to enhance implement and increase the efficiency of crop harvesting equipment and its cutting tools (Bochat et al., 2021; Cui et al., 2021; Dixit et al., 2012; D. Du & Wang, 2016; El Didamony & El Shal, 2020; Glaus et al., 1972; Hosseinpour‐Zarnaq et al., 2022; Huang et al., 2020; Lesani et al., 2018; Lima et al., 2021; Navas et al., 2020; Patel et al., 2018; Pellenc & Pellenc, 2014; Popa & Popa, 2020; Schmid, 1965; Shearer et al., 1991; Song et al., 2022; Taghinezhadet al., 2012; Tang et al., 2021; Vu, Ngo, et al., 2020b; W. Wang et al., 2022; Xie, Jin, et al., 2022; Xie, Wang, et al., 2022). One of the key factors in crop harvesting is cutting force (Ma et al., 2014; Preethi et al., 2021; Zein El‐den et al., 2020).…”

Section: Introductionmentioning

confidence: 99%

On‐farm cropping sensor‐based smart device for cutting energy measurement of cereal crops

et al. 2023

View full text Add to dashboard Cite

A device was developed for on‐field cutting energy measurement of cereal crops. Physical, engineering, and anatomical properties of prominent rice (Oryza sativa L.) cultivars of India were studied at different stem positions using a factorial CRD design. The effects of changes in different operational parameters, including blade bevel angle (15°, 20°, and 25°), cutting angle (25°, 30°, and 35°) and cutting velocity (2.9, 3.44, and 4.1 m s−1) on cutting force and cutting energy of rice stalk were also studied. Cutting angle indicated the angle of inclination of cutting edge to the horizontal at blade‐crop interface. The assessment of these properties and parameters in relation to crop cutting energy, led to the development of a smart device for energy measurement up to a size of three skills. This device consisted of a compression system, crop holding unit, cutting unit, and sensors to measure the force, speed, and cutting height. The device's measurement abilities were evaluated with wheat (Triticum aestivum L.) stalks at different cutting speeds (0.83, 1.16, and 1.5 m s−1 and stem heights (10, 20, and 30 cm from ground). Values for cutting force and energy ranged from 1.85 to 1.45 N and 10.81 to 8.48 N mm–1, respectively. At all stem heights, the cutting force and cutting energy ranged from 1.79 to 1.44 N and 11.92 to 6.74 N mm–1, respectively. The ultrasonic sensor provided real time cutting height data with an accuracy of 97.5%, while the gyroscope sensor had an accuracy of 94.29% for on‐field cutting angle measurement.

show abstract

Effects of cutter parameters on shearing stress for lettuce harvesting using a specially developed fixture

Cited by 5 publications

References 18 publications

Experiment and Research on Cutting Mechanical Properties of Little Cabbage

Experiment and Research on Cutting Mechanical Properties of Little Cabbage

Test of the Screening and Parameter Optimization of Swing Separation Sieve in Field Operation

On‐farm cropping sensor‐based smart device for cutting energy measurement of cereal crops

Contact Info

Product

Resources

About