Analysis of Frequency Characteristics at Spindle CNC Machining Centre

Abstract

Efficient machining using the technology of wire electrical discharge machining (WEDM) is a compromise between cutting speed and surface quality. Typical morphology of WEDM processed surface features plenty of craters caused by electrospark discharges produced during the cutting process. The study deals with the evaluation of S-parameters enabling quantitative evaluation of the surface in all directions which are technically significant. Attention was also paid to surface morphology and its evaluation using 3D colour-filtered and unfiltered images. The experiment included 33 variants of setting machine parameters on samples made of two metallic materials: Al 99.5 and Ti-6Al-4V.

Efficiency of Coupled Experimental–Numerical Predictive Analyses for Inter-Story Floors Under Non-Isolated Machine-Induced Vibrations

“…The validity of an efficient one-bay FE model of the inter-story floor, calibrated to the available experimental feedback, is discussed in this paper. Differing from past literature studies on machine-induced vibrations on rigid foundation systems (i.e., [9][10][11][12]), or focused on the machinery characterization only (i.e., [15][16][17]), the attention of the experimental analysis is in fact focused both on the movable components of the machines and on the corresponding response of the primary structure. Based on a dedicated experimental program, the final result takes the form of a synthetized signal for the CNC machine that can be used for refined numerical analyses of the primary system.…”

Predictivity of CNC Machine-Induced Vibrations on Inter-Story Floors Based on Coupled Experimental-Numerical Investigations

“…Various research studies have been also dedicated to the vibrational characterization of specific machinery tools. Differing from past literature studies that have been focused on machine-induced vibrations on rigid foundation systems (i.e., [9][10][11][12]), or on the machinery characterization only [17][18][19]; however, the attention of the experimental and FE numerical analysis reported in this paper is in fact dedicated to the movable components of the machines and on the corresponding response of the primary structure. The final result takes the form of a synthetized signal for the CNC machine that can be used for refined numerical analyses of the primary system.…”