Cutting operations using blades can arise in a number of industries, for example, food processing industry, in which cheese, fruit\r\nand vegetable, even meat, are involved. Certain questions will rise during these works, such as ââ?¬Å?why pressing-and-slicing cuts use\r\nless force than pressing-only cutsââ?¬Â and ââ?¬Å?how is the influence of the blade cutting-edge on forceââ?¬Â. To answer these questions, this\r\nresearch developed a mathematical expression of the cutting stress tensor. Based on the analysis of the stress tensor on the contact\r\nsurface, the influence of the blade edge-shape and slicing angle on the resultant cutting force were formulated and discussed. These\r\nformulations were further verified using experimental results by robotic cutting of potatoes. Through studying the change of the\r\ncutting force, the optimal slicing angle can be obtained in terms of maximum feeding distance and minimum cutting force. Based\r\non the blade sharpness properties and the specific materials, the required cutting force can be predicted. These formulation and\r\nexperimental results explained the basic theory of blade cutting fracture and further provided the support to optimize the cutting\r\nmechanism design and to develop the force control algorithms for the automation of blade cutting operations.
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