Abstract
We propose a determination method to cut and disassemble a product into parts or units in consideration of the connection among inside parts and units. Firstly a surface expansion diagram is made to show the structure of all parts and units from the assembly drawing of 3-D CAD. This diagram shows the fixed position, condition between a surface and parts, and information of the material, size, dangerous substance and so on of the parts to classify for recycling. Secondly a surface connection diagram is made to show the connection between the surfaces and the parts that join two surfaces together. This diagram is used for judging a subset of surfaces that are joined by inside parts that are impossible to cut through the surface. Thirdly the criteria for cutting order are determined from the surface expansion diagram and the surface connection diagram in consideration of the sort of material and the joint parts.
