Kesici Takım Dinamiğinin Modellenmesi ve Analizi


KORKUT İ. (Executive), BAYRAM B. S.

Project Supported by Higher Education Institutions, 2021 - 2022

  • Project Type: Project Supported by Higher Education Institutions
  • Begin Date: September 2021
  • End Date: August 2022

Project Abstract

Milling operations are an important manufacturing method that is frequently used in many areas of production such as defense, automobile and medical industries. The milling method is a process in which the final part is given its final shape by cutting from a whole part and removing chips. The performance of this method and the quality of the produced part are directly related to the stability of the cutting process. It is important to understand the dynamics of milling to improve the stability of the cutting process. A mechanical model has been developed to predict the cutting forces that affect the stability of the milling process within the scope of this project. The specific shear coefficients used in the estimation model were calculated based on the optimized shear force data and based on the average shear force concept. Fourier approximation method was used to optimize the force data in sinusoidal form. Three repetitive milling experiments were carried out with different predetermined feed rate parameters, constant cutting speed and axial depth for each feed value in order to calculate the cutting coefficients. AISI 4140 tempered steel with an average hardness of 304 HB was chosen as the workpiece for the milling experiments. As the cutting tool, end mill with 38° helix angle and 9.5 mm diameter made of AlCrN coated tungsten carbide (WC) alloy was used. The force estimates made with the model presented in the study were compared with the experimental measurements, and it was seen that the estimates were in agreement with the experimental measurements in the 80-90% accuracy range.