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The Intangibles
Published in Tim Kuschel, The Live Event Video Technician, 2023
A good multi-tool like a Leatherman or Gerber. You may be thinking old school and go for the traditional Swiss Army knife, but there are probably more things on there that you are never going to use. The multi-tool gives you the four main players: sharp knife, pliers, cross-point (Phillips-head), and flat-head screwdrivers. Be sure to pack it in your checked luggage if flying to and from shows. The TSA will confiscate it since you can’t take in on the plane because of the knife and pliers.
Experimental investigation on machining of multiple micro-square holes
Published in Materials and Manufacturing Processes, 2023
Aruna K, Somashekhar S Hiremath
Sameh et al.[9] machined more than one micro-hole at a time with multiple circular thin electrodes by varying lateral space between the tool to enhance the efficiency of the process and productivity. They studied the lateral space required for machining and investigated output responses like MRR and TWR concerning the number of tools. Singh et al.[10] fabricated a single micro-tool by using the Bulk Electro Discharge Grinding (BEDG) method with initial and final diameters of 500 μm and 55 μm. The same tool is used to machine a 4 × 4 array of micro-holes on a copper sheet, resulting in a diameter of 80 μm. This array of holes is used for micro-tool fabrication using reverse-EDM. Further machining with fabricated tools and parametric analysis is performed. Debanath and Patowari [11] are fabricated micro-pin-fin arrays using a 2-axis wire-EDM of square cross-section on stainless steel and copper. Each pin thickness varies from 145 μm to 170 μm with an intermediate distance of 250 μm and identified the significant parameters as current and Ton. Hiremath et al.[12] investigated on machining of copper plates using NiP-coated hallow copper electrodes using tailor-made µ-EDM. Also analyzed the influencing parameters on responses like MRR, taper angle, diameter over cut, and TWR using different statistical approaches. Thao et al.[13] investigated HAZ and microhardness around the micro-holes machined by μ-EDM. The results from the study show that there is HAZ around the machined hole, and microhardness reduction is observed near the hole. Manivannan and Kumar [14] used the TOPSIS approach to identify optimum process parameters of μ-EDM drilling of AISI 304 stainless steel. It maximizes circularity at entry and exit, MRR, and minimizes the OC, TA, TWR, and SR. Micro-square holes are primarily observed in organic thin-film transistors,[15] micro filters, perforations, and optical transmission and emission devices.[16] Some of the observations from the literature are Most of the literature is available on machining micro-holes on various engineering materials and a parametric study of the μ-EDM process. A few studies on multi-hole machining with μ-EDM are available.To machine multi-holes, the fabrication of multi-tool is a primary challenge. Wire-EDM is one of the technologies available to fabricate micro-tools. Multi-tool machining improves productivity and reduces cost and energy.According to the author’s knowledge, no research articles are found on machining multiple micro-square holes with different pitch distances on copper material using μ-EDM.