Experiment and Research on Cutting Mechanical Properties of Little Cabbage

Wei Wang,Xiaolan Lv,Zhongyi Yi,Jinqi Zhang,Shilin Wang

doi:10.3390/app12042060

Abstract

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.

Highlights

The cutting force–displacement curve little cabbage is shown in Figure cuttingcutting process was divided into three stages, namely, the near-linear rising stage (stage process was divided into three stages, namely, the near-linear rising stage, I), the the oscillation fluctuation stage
The optimal combination of of cutting parameters were obtained by the single factor test and response surface method (RSM) test, and the model cutting parameters were obtained by the single factor test and test, and the model for the optimal parameter combination was demonstrated by the validation experiments
The results showed that the single factor test results showed that the maximum cutting stress and specific cutting energy had a trend of a decrease first and increase with the increase in the oblique angle, decreasing with the sliding angle, and decreasing first and increasing with the cutting gap

Summary

Introduction

Little cabbage is rich in nutrients and is one of the most important vegetable species in. The degree of mechanization in the harvesting of little cabbage is low at present, and there are problems such as high labor intensity and low production efficiency in manual harvesting. The cutting device is an important component of little cabbage vegetable harvesters. Reducing power consumption and cutting damage in the cutting operation and improving the service life of the tool are the main factors to be considered in the design of the cutting device. Investigating the physical and mechanical properties of the roots of little cabbage has important guiding significance for the research and development of cutting devices [1,2]

Methods

Results

Discussion

Conclusion