Improving precision characteristics of the form-building equipment using the composite frameworks obtained with application of the contactless measurement system

Aviation industry presents the increased demand to geometric accuracy of a product. Component production from the polymer composite materials is based on obtaining final geometric characteristics of a product, as a result of machining on the precision molding equipment. Experience in manufacture of forming equipment from the polymer composite materials demonstrated that a shell reinforced with walls was most effective both structurally and technologically; and it could be considered as the main design scheme for the forming equipment. One of the critical factors influencing the equipment shape accuracy is connection between the frame and the form-building shell. To increase accuracy in manufacturing the form-building equipment, a method is proposed that involves scanning the backside of the form-building shell and subsequent machining of the composite support frame on a CNC machine based on the scanning results, which allows reducing maximum deviations from the shell theoretical contour. Analyzing results of testing this method showed an increase in the frame contact area with the form-building shell and, as a consequence, the adhesive connection area, which made it possible to increase the equipment service life.

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