THEORETICAL MODEL FOR CALCULATING THE ELASTIC AND CONTACT DEFORMATIONS OF THE POSITIONING ELEMENTS OF A 3-2-1 FIXTURE SYSTEM

Aurel TULCAN, Felicia Veronica BANCIU, Liliana TULCAN, Ion GROZAV

Abstract


Regardless the machining, assembly and inspection domain, the fixture design is crucial its main purpose being to locate accurately and hold the workpiece, preserve these during manufacturing process, without displacements, rotations or deformation of the workpiece. During various operations the clamping forces and cutting forces act on workpiece. The paper presents a theoretical model for calculate the elastic and contact deformations of the positioning elements and the movement of the part under their action in the case of a 3-2-1 fixture system having elastic locators around a rigid rectangular workpiece. The analysis and calculations are performed by means of a software program made in the Python programming language. They help to estimate the various errors that may occur during the manufacturing process, to estimate the reactions on the positioning elements and to estimate the fixing and processing errors.


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References


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