Z-map based cutting force prediction for elliptical ultrasonic vibration-assisted milling process

Abstract

Elliptical ultrasonic vibration-assisted milling (EUVAM) adds high-frequency vibration to conventional milling (CM) to realize high-frequency intermittent milling. It has broad application prospects in the processing of difficultto-cut materials such as titanium alloys, superalloys and hard and brittle materials. To reveal the mechanism of the highly intermittent cutting nature in EUVAM, according to the motion relationship between cutting edge and workpiece and the Z-map model of the workpiece, a method and its algorithm for calculating undeformed cutting thickness and thus the cutting force in EUVAM are proposed. The simulation results show that EUVAM can improve the actual cutting speed when compared with CM, and the proportion of idle cutting time will directly determine the intermittent degree of the milling process. The experiment of EUVAM is performed to verify the correctness of the proposed cutting force model, and the impact of spindle speed on the cutting force in EUVAM is also analyzed.

Response time optimization for vulnerability management system by combining the benchmarking and scenario planning models

“…The results of benchmarking tests can be used to compare these three scanning techniques and confirm what happened in the experiment with what was written in the literature [5]. Furthermore, even if not run with high specification computer and bandwidth for large-scale Internet scanning, the Zmap and Masscan applications are consistently fast scanning [25], [26]. According to de Santis [12] research, network scanning applications have high accuracy.…”

“…In Zmap and Masscan, unable to perform multi-port scanning on only one IP address. In addition, Zmap and Masscan do not provide a command line that can detect port vulnerabilities by identifying services, versions, and operating systems or firewalls [25], [26].…”

Theoretical and experimental study of cutting forces under tool flank interference in ultra-precision diamond milling

“…For the milling bevel, the milling bevel of the ball-end milling cutter can also be converted into a milling plane by coordinate transformation, and based on the micro-element discrete method, three conditions are proposed to judge whether any point on the cutting edge meshes with the workpiece, it can greatly improve the solution efficiency [18]. Z-map is a typical discrete method for micro-elements, which describes an object is approximated as a set of z-axis aligned vectors, called Z-map vectors, passing through the grid points on the xy-plane, this representation can be effectively used for the surface that is always visible from above in the direction parallel to the z-axes [19]. The Z-map method can be used to analyze the interference situation of the ball-end milling cutter under different milling attitudes, and the interference area can be obtained by comparing the Z-map data of the tool and the workpiece [20,21].…”