Directing at the hard machinability of high volume fraction 70% SiCp/Al composites, a longitudinal and torsional ultrasonic-assisted milling (LTUAM) method is proposed to improve edge quality machining efficiency. By observing metallographic structure material, three-dimensional (3D) finite element model random distribution spherical, elliptical polygonal SiC particles established analyzed by A...

The condition of the surface through which a sound beam enters a material is an important factor in ultrasonic non-destructive testing(1). Detection of discontinuities such as cracks, voids and porosities in castings is greatly affected by the extent of roughness. Increased roughness reduces the transmitted energy of the sound beam and this, in turn, reduces the amplitude of the received signal...

In order to study the influence of spindle speed and amplitude on surface integrity, TC18 titanium alloy samples were milled by process conventional milling longitudinal ultrasonic vibration assisted milling. The experimental data obtained dynamometer, thermometer, scanning electron microscope, X-ray diffractometer, three-dimensional topography instrument for observation analysis. results show ...

An SiCf/SiC composite has the following excellent properties: high strength, low specific gravity, and temperature resistance, which great prospects in combustion chamber of rockets or aero engines. Hole-making parts is an important processing method. Generally, water-based oil-based coolants are avoided, so dry drilling primary hole-making approach for SiCf/SiC. However, abrasion resistance ha...

It is a very challenging task to develop effective process control methodologies for multi-operational manufacturing processes. Although Statistical Process Control (SPC) has been widely used as the primary method in the control of quality, it mainly serves as a change detection tool rather than a method to identify root causes of process changes. This paper proposes a systematic approach to ov...

Abstract The polishing efficiency of the soft abrasive flow (SAF) method is low, which not in line with concept carbon emission reduction industrial production. To address above issue, a two-phase fluid multi-physics modeling for ultrasonic-assisted SAF processing proposed. acoustics-fluid coupling mechanic model based on realizable k - ε and Helmholtz equation built to analyze cavitation effec...