Theoretical and experimental study on the processing deformation of slender beam structural parts of Ti6Al4V.

Bending deformation is easy to occur under the action of cutting force during machining, due to the weak stiffness of slender beam structural parts of Ti6Al4V. This will lead to the change of the theoretical cutting position relationship between the tool and the workpiece, thus affecting the machining accuracy and quality of the parts. Aiming at the structural characteristics and machining deformation of slender beam parts with weak stiffness of Ti6Al4V, the bending deformation of slender beam structural parts under the action of static force is analyzed by theory of Euler Bernoulli beam and finite element simulation of ABAQUS. The influence of support mode on the overall static stiffness and machining deformation of the beam is discussed. It is concluded that the clamping method of fulcrum assisted support and micro-crystalline wax filling in the machining process of slender beam structural parts of Ti6Al4V cannot only effectively suppress the machining deformation of parts but also solve the problem of machining chatter of parts. The machining accuracy and quality of slender beam structural parts are effectively improved. Slender beam parts with weak stiffness of Ti6Al4V processed according to this clamping concept. The maximum deformation of the part is 0.017 mm, the maximum dimensional deviation is − 0.015 mm, and the surface roughness Ra of the part is less than 0.5 μm. [ABSTRACT FROM AUTHOR]