Laser cutting well-known as a manufacturing process is rapid, repeatable, and reliable method that frequently used for various materials such thermoplastics. Due to their physical chemical properties fatigue resistance, high toughness, re-melting properties, thermoplastics polycarbonate are widely in automotive parts, electronics, etc. In this study, numerical simulation of the laser by finite ...

Background: Wire Electrical discharge machining (WEDM) has higher capability for cutting complex shapes with high precision for very hard materials without using high cost of cutting tools. During the WEDM process, the wire behaves like a metal string, straightened by two axial pulling forces and deformed laterally by a sum of forces from the discharge process. Major forces acting on the wire c...

Ice coring of temperate and polythermal glaciers demonstrates some limitations of most electromechanical (EM) and thermal electric (TE) drills. Most TE drills are heavy, require a heavy power system, work slowly and cannot operate in boreholes going through the cold–temperate ice transition. Antifreeze thermal electric drills (ATED) are capable of operating in polar ice caps, polythermal and te...

Billions of light emitting diodes LEDs are used today in traffic control, automotive headlights, flat panel display technology, mobile devices, back lighting, projection, and general illumination applications. With the dramatic growth in LEDs, manufacturers are looking for technologies to increase production yield and decrease cost. Sapphire wafer singulation into miniature dies is one of the c...

Boundary encroachment or cutting right up to pre-cut sections are examples of unsteadystate operations of the laser cutting process. Cornering and generating small diameter holes also fall into this category. Heat transferis often frustrated here, resulting in bulk heating of the workpiece. This in tum leads to a degradation of the cut quality.' Currently, trial-and-error based experimentation ...

The rising cost of hardwood sawlogs has increased sawmill managers’ interest in considering the installation of thin-kerf sawing machines in their sawmills. Replacement of circular headrigs by band headrigs and/or reducing resaw kerfs are the available options. Equipment replacement or modification to achieve thin-kerf sawing will require an investment. Sawmill managers making such an investmen...

Abstract Waterjet-Guided Laser (WJGL) machining is an advanced technique providing efficiency and precision for wood machining. The present study investigates the practical demonstration analysis of laminated object manufacturing (LOM) WJGL thin A theoretical process laser cutting was established, expressing relations between cut kerf width influencing parameters. WJG Nd: YAG system utilized Ko...

Abrasive waterjet cutting is a well-established non-conventional technique for the processing of difficult-to-cut material and rendering various complex geometries with high accuracy. However, as in every machining process, it also required that efficiency productivity are achieved. For reason, present study, effect performing process by multiple passes investigated, evaluation this approach pe...