METHOD FOR DESIGNING Ｃ-FRAME TO OPTIMIZE Ｃ-FRAME STRUCTURE OF PRECISION DRILLING AND AUTORIVET MACHINE FOR AIRCRAFT ASSEMBLY

摘要

The present invention has the purpose of designing a novel C-frame by optimizing a C-frame structure of an autoriveter, and improving the economic feasibility and the workability. The method for designing a C-frame used in a processing machine for aircraft assembly for drilling and riveting comprises a step of modeling a processing machine including the C-frame with a finite element model; a step of assigning positions of multiple reinforcement materials arranged within the C-frame; a step of designating the thickness of the upper panel, the thickness of the lower panel, the thickness of the left side panel, and the thickness of the right side panel of the modeled C-frame, and the thickness of the multiple reinforcement materials arranged within the C-frame surrounded by the panels as first design variables; and a step of calculating each thickness value of the first design variables based on the allowable displacement of the upper projection, the allowable displacement of the lower projection and the maximum allowable stress of the C-frame. [Reference numerals] (AA) Start; (BB) End; (S310) Step of modeling with finite element model; (S320) Step of assigning positions of reinforcement materials; (S330) Step of designating first design variables; (S340) Step of calculating each thickness value of first design variables; (S350) Step of selecting reinforcement materials excessive to design minimum value; (S360) Step of designating second design variables; (S370) Step of calculating each thickness value of second design variables