The utilization of Waste Electrical and Electronic Equipment is a hot spot in environmental protection field presently and
the resource utilization of cable wastes is an important subject. An enormous amount of electrical cable is disposed of as
scrap each year. In order to recycle the valuable copper wires, cable granulator technique is used widely. However, one
of the shortcomings of this technique is it has serious tool wear. In order to better understand the reason for tool wear,
this paper simulates the stress and strain distribution in the cutting tool and copper during the cutting process in cable
granulator by finite element method. The result shows that a tensile stress region, which is the main reason for blade
tipping, appeared in the upper blade. Besides, the tensile stress in the right side of upper blade is higher than that in the
left side. Therefore, in order to extend the life of cutter, we suggest using different materials in different stress zone to
manufacture cutting tool. After the cutter was worn out, the right side of the blade can be renovated using material with
well tensile performance through overlaying welding, as well as the left side of the blade can be renovated by material
with high red hardness, high wear resistance, and high compression strength through overlaying welding. This method
can reduce the consumption of precious metals and raise the utilization rate of materials.
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