Abrasive flow polishing plays an important part in modern ultra-precision machining. Ultrafine particles suspended in the medium of abrasive flow removes the material in nanoscale. In this paper, three-dimensional molecular dynamics (MD) simulations are performed to investigate the effect of impacting direction on abrasive cutting process during abrasive flow polishing. The molecular dynamics s...

Abstract Needled quartz fiber reinforced phenolic aerogel composite (NQF/PA) is a kind of lightweight thermal protection material commonly used in the aerospace field. With continuous development science and technology, design various spacecraft becoming more complex. Due to limitation preparation process, components are difficult be directly prepared formed. It often necessary carry out second...

SUMMARY The use of composite laminates in complex structures has increased significantly. However, there are still some issues when considering their use, mainly related with machining, leading to some difficulties and lack of acceptance. In this work, a methodology to evaluate drill geometry and feed rate based on thrust force and delamination extension is presented. INTRODUCTION For the past ...

Cutting force is vital in machining nickel-based superalloys due to their excellent mechanical properties, thus creating difficulty cutting. In the current scenario of metal machining, milling processes require high spindle speed and low chip load, which result a cutting force. However, load not only but also material removal rate (MRR). It contrary ultimate high-speed (HSM) goal, improve produ...

In the present study, an attempt has been made to investigate the influence of the forging parameters on cutting forces for different cutting speed, depth of cut, and feed rate during machining of Al 7075 alloy and Al 7075 alloy with short basalt fiber reinforced metal matrix composites. The experiments were conducted by using a lathe machine with tool dynamometer setup. KeywordForging effect, ...

Difficult machining characteristics of titanium alloy materials and low rigidity thin-walled component make Titanium Alloy Thin-Walled Component (TATWC) prone to chatter during machining, resulting in poor surface quality other defects, which restricts the expansion application TATWC special industrial field. The appearance Ultrasonic Vibration Assisted (UVA) milling method provides a new techn...

In complex robot applications, such as human−robot interaction and machining, robots should interact with an unknown environment. To learn the interactive skill, a model-based actor−critic learning algorithm safety-learning strategy are proposed in this article to find optimal impedance control, which process is safe fully automatic does not know system parameter. algorithm, critic defined quad...

This paper is an endeavour to critically appraise the existing methods used for real-time simulation of machine tool dynamics with the emphasis on modelling and simulation of the dynamic behaviour of CNC machine tool feed drives and mechatronic systems for machine tools. The actual approaches for linking the feed drive models with structural models for CNC machine tools are examined. Also the f...

A virtual machine tool (VMT) is presented in this two-part paper. In Part 1, the analytical foundation for a virtual machining system is developed, which is envisioned as the foundation for a comprehensive simulation environment capable of predicting the outcome of cutting processes. The VMT system undergoes “pseudo-real machining”, before actual cutting with a CNC machine tool takes place, to ...

In order to further improve the dimensional accuracy of micromilled thin walls with high aspect ratios, machining process should be actively controlled. A device for active cutting force measurement and parameter compensation is developed realize real-time radial forces parameters in wall process. Firstly, a mathematical model established calculate deformation based on cantilever beam theory. T...