In this study, bulk ultrafine-grained and micro-crystalline cobalt was prepared using a combination of high-energy ball milling and subsequent spark plasma sintering. The average grain sizes of the ultrafine-grained and micro-crystalline materials were 200 nm and 1 μm, respectively. Mechanical properties such as the compressive yield strength, the ultimate compressive strength, the maximum comp...

INTRODUCTION The North American manufacturing industry has seen a growing demand for precision machined components in recent years. Biomedical devices, micro-optical moulds, and automotive parts are examples of precision manufactured components. Traditional milling practices have reached the limit of the machines’ accuracy and cannot achieve high tolerances now demanded in the micro-machining f...

Acoustic emission (AE) signals collected from different locations might provide various sensitivities to tool wear condition. Studies for monitoring using AE sensors on workpieces has been reported in a number of papers. However, it is not feasible implement the production line. To study feasibility obtained spindles monitor micro-milling, spindle housing and workpiece were simultaneously analy...

In this study, a model of micro-milling cutting forces based on elementary experiments is developed. Elementary tests were used to identify the parameters new that includes uncut chip thickness and effect edge radius. This assumes straight rigid tool divided into two terms represent ploughing shearing regimes. The complex shape micro-end-mill decomposed linear edges which force can be applied. ...

The paper describes micro structural observation (LM and SEM), which has been made on quick-stop sectioned samples of the chip formation, either on metals (high-speed steels) and Ti3SiC2 ceramic. All milling tests were carried out using a “quick-stop” method developed by the authors. For micro structural analysis samples were prepared by standard metallographic technique and examined with a lig...

Aiming at the various shortcomings of existing tool setting methods, this paper proposes a coaxial holographic method for tiny tools. Based on research and analysis principle imaging key issues images, set detection device micro milling was built, measurement carried out five-axis machining center using standard experiment. Experimental results show that can efficiently perform micro-milling to...