Due to the brittleness of silicon, use a diamond wire cut silicon wafers is critical stage in solar cell manufacturing. In order improve production yield cutting process, it necessary have thorough understanding phenomena relating parameters. This research reviews and summarizes technology for precision machining monocrystalline using sawing (DWS). Firstly, mathematical models, molecular dynami...

The monitoring of cutting force components is one the possibilities to control machining processes from point view its stability, machine tool spindle or loading. This paper presents and compares results experimental longitudinal sawing pine wood with 4 saw discs different teeth number (16 24) rake angle (10° 20°) during up (conventional) down (climb) revolutions (4000 min-1, 5000 6000 min-1) f...

Abstract Sawing variation (SV), the degree of deviation from a specified target lumber size, is an unavoidable component sawing process. SV influenced by several factors such as machine, material, set works, feed and cutting parameters. To account for these resulting in deviations desired thickness cut must be increased that only minimal number boards less than thickness. Thus, greater amount S...

A new method for creating microcantilevers in glass allows integration of optical waveguides and Bragg gratings. Devices are fabricated by high precision sawing, followed by direct UV writing of waveguides with Bragg gratings and then chemical etching to release the freestanding glass structures. Optical measurement of the Bragg gratings together with piezo-actuation allows the mechanical reson...

A human skeleton was found in a forest after an aging time (laydays) of nearly three years. Surprisingly a larger number of living maggots crawled out of the medullary cavity of the humerus after sawing it longitudinally. Investigations of other long bones showed remnants of maggots, fly-pupas and maggot-excrements in similar cases. A humerus is found after an estimated aging time of over 100 y...

The planning of how hardwood logs can be sawn to improve recovery of high-value lumber has always been hampered by the limited information provided by external defects, and whatever internal defects are eventually revealed on the cut log faces by the sawing pattern. With expanded markets, lower-quality logs, increased competition from non-wood products, social pressures to manage public lands f...

—A three-dimensional (3D) log sawing optimization system was developed to perform 3D log generation, opening face determination, sawing simulation, and lumber grading. Superfi cial characteristics of logs such as length, large-end and small-end diameters, and external defects were collected from local sawmills. Internal log defect positions and shapes were predicted using a USDA Forest Service ...