CAD / CAM system for sheet metal working, program and recording medium recording program

摘要

An object is to perform general-purpose automatic tool assignment with high accuracy in a sheet metal CAD / CAM system. A CAD drawing is created (S102), continuous line processing, product peripheral lines, product window blanks, etc. are defined (S103), and tools are assigned (S210 to S286). Automatic tool assignment is completed first for a preferential processing shape such as a simple shape (circle, triangle, etc.) or a shape that can be punched with a special tool (S210). Next, general-purpose automatic tool assignment processing is performed. In this processing, the arc and slant straight line portion of the machining shape unit are divided by a shape to which a horizontal / vertical / orthogonal line is added, and a tool is assigned (S250), the remaining shape is converted to a rectangle, and the tool is assigned to the rectangle. (S280). After creating a non-executable NC program by these tool assignments (S112), the NC program is optimized (S114), and an executable NC program is output (S116).