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Articles by Nukman Yusoff
Total Records ( 2 ) for Nukman Yusoff
  Nukman Yusoff , Saiful Rizal Ismail , Azuddin Mamat and Aznijar Ahmad-Yazid
  Laser has been used to cut most non-metallic materials very efficiently and successfully because these materials are highly absorptive by the CO2 laser wavelength of 10.6μm. Laser cutting process has been found to be reliable in loads of applications, with several advantages over other mechanical means in producing successful cut of even thermally sensitive materials such as wood. Various works which have been conducted to resolve the interaction between laser and wood but an ultimate guideline to produce the best cutting results are still undecided. This latest experiment was performed on Malaysian light hardwood namely, Nyatoh (Palaquium spp.), Kembang Semangkok (Scaphium spp.), Meranti (Shorea spp.) and normal Plywood using low power carbon dioxide laser machine with 500 Watt maximum output. The low power laser machine (Zech Laser model ZL 1010), equipped with a slow flow CO2 laser producing maximum output power of 500 watt on beam mode of TEM01 is employed. The processing variables taken into investigation were laser power, nozzle-standoff distance (SOD) or focal point position, nozzle size, assist gas pressure, types of assist gas, cutting speed and delay time. The wood properties observed were thickness, density and moisture content of the wood. The analyses considered were of the geometric and dimensional accuracy (straight sideline length, diameter of circle, kerf width, and percent over cut), material removal rate, and severity of burns of the matters upon machining with compressed air or any assist gases. The relationship between processing parameters and types of wood with different properties were outlined in terms of optimum cutting conditions, the minimum burnt-effect achievable and the best cut quality obtained with minimal surface deterioration and acceptable in accuracy. From this present study a guideline for cutting a wide range of Malaysian wood has been outlined.
  M.A. Wazed , Shamsuddin Ahmed and Nukman Yusoff
  The main objectives of this research are to study the commonality indices in manufacturing resource planning reported in literatures since 1980 and some useful insights including advantages and disadvantages of using commonality in manufacturing/production environment. It is observed that in designing a new family of products/processes or analyzing an existing family, commonality indices can often be used as a starting point. Systematic understanding and effective use of commonality and commonality indices can help managing inventory levels, uncertainties and cost dimensions.
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