Cutting Mechanical Properties of Pumpkin Grafted Seedling Investigated by Finite Element Simulation and Experiment

Abstract

The cutting device in the seedling grafting process was studied, which provided a reference for optimizing the structural parameters and working parameters of important shearing components in the seedling grafting line, thereby improving the performance of the cutting device. The dynamic cutting process of the cutting device was numerically simulated. The effects of four factors, the average cutting speed (X1), the sliding angle (X2), the cutting edge angle (X3), and the cutter clearance (X4) on the cutting force, were studied. The optimal combination of structural parameters and working parameters of the cutting device was determined. The simulation results showed that the sliding angle (X2) and the cutting edge angle (X3) affect the ultimate cutting stress. The average cutting speed (X1) and the cutter clearance (X4) affect the ultimate cutting force. When X1, X2, X3, and X4 are 579 mm/s, 39°, 25°, and 1.4 mm, respectively, it is the better combination parameter, and the ultimate cutting equivalent stress of the cutting device is 0.32 Mpa. A high-speed cutting device for grafted seedlings was built, and the cutting experiment was carried out. The experiment results showed that the simulated values fit well with the experimental data. Under the optimal combination of cutting parameters, the cutting stress of the cutting device was smaller. The finite element simulation of the seedling grafting cutting device reduces the experiment cost and provides a reference for developing the seedling grafting line.

Design and Experiment of Automatic Transport System for Planting Plate in Plant Factory

“…We applied a gravitational force of 2.79 N under each planting cup and 6.71 N in the center of the cultivation plate. To ensure the accuracy of the simulation's calculations, this study used the Sweep function to partition the mesh and set the free form surface mesh type to Quad/Tri [36]. The mesh size at the handle was set to 1 mm and From the analysis of Figure 17, it can be seen that the maximum height changes of the center of mass were 0.04 mm, 0.65 mm, 1.80 mm, and 3.05 mm when the propulsion speed was increased from 0.2 m•s −1 to 0.5 m•s −1 .…”

“…We applied a gravitational force of 2.79 N under each planting cup and 6.71 N in the center of the cultivation plate. To ensure the accuracy of the simulation's calculations, this study used the Sweep function to partition the mesh and set the free form surface mesh type to Quad/Tri [36]. The mesh size at the handle was set to 1 mm and the other parts were set to 3 mm, with a total of 395,322 nodes and 203,811 meshes.…”

Reaper Blade System for Harvesting Sunflowers

“…Daipeng Lu, Wei Wang, et al, 2022, in the course of multifactorial orthogonal experiment and mathematical modeling established the factors that affect the cutting stress: sliding angle, cutting edge angle, cutting speed. It was found that the factor of greatest importance is the sliding angle.…”

Melon Robotic Grafting: A Study on the Precision Cutting Mechanism and Experimental Validation

“…Tian et al selected the range of rootstock and scion cutting angles based on their experience, designed a rotary cutting mechanism, and obtained the optimal parameter combination of cutting radius, cutting speed, and cutting angle [14]. Lu et al investigated the effects of the sliding cutting angle, cutting edge angle, and average cutting speed on cutting energy consumption and determined the order in which each factor affects the significance of cutting stress [15]. Jiang et al performed parameter optimization of the rotary cutting mechanism to change the cutting angle by adjusting the spatial position of the center of rotation of the cutter.…”