Number 3 Volume 17 June 2011 Journal of Engineering TECHNOLOGICAL ANALYSIS OF FLAT SURFACE CONDITIONS BY MAGNETIC ABRASIVE FINISHING METHOD (MAF) Dr. Ali H. Kadhum – Baghdad University – Al-Khawarizmi College of Engineering, Manufacturing Operations Department- Al-Jadriia, Baghdad (
[email protected]). Yahya M. Hamad - Baghdad University – Al-Khawarizmi College of Engineering, Manufacturing Operations Department- Al-Jadriia, Baghdad (
[email protected]) Nazar K. Mohammad - Baghdad University – Al-Khawarizmi College of Engineering, Manufacturing Operations Department- Al-Jadriia, Baghdad ABSTRACT This study introduced the effect of using magnetic abrasive finishing method (MAF) for finishing flat surfaces. The results of experiment allow considering the MAF method as a perspective for finishing flat surfaces, forming optimum physical mechanical properties of surfaces layer, removing the defective layers and decreasing the height of micro irregularities. Study the characteristics which permit judgment parameters of surface quality after MAF method then comparative with grinding. : ﺍﻟﺨﻼﺼﺔ ( ﻋﻠﻰ ﺍﻟﺴﻁﻭﺡ ﺍﻟﻤﺴﺘﻭﻴﺔ ﺤﻴﺙ ﺍﺴﺘﺨﺩﻤﺕ ﺜﻼﺜﺔ ﻤﺘﻐﻴﺭﺍﺕ MAF) ﺘﻡ ﺩﺭﺍﺴﺔ ﺘﺄﺜﻴﺭ ﺍﺴﺘﺨﺩﺍﻡ ﻁﺭﻴﻘﺔ ﺍﻟﺘﺸﻁﻴﺏ ﺒﺎﻟﻨﺤﺕ ﺍﻟﻤﻐﻨﺎﻁﻴﺴﻲ ﺃﺴﺎﺴﻴﺔ ﻫﻲ ﺍﻟﺤﺙ ﺍﻟﻤﻐﻨﺎﻁﻴﺴﻲ ﻭﺴﺭﻋﺔ ﺍﻟﻘﻁﻊ ﻭﺍﻟﺨﻠﻭﺹ ﻭﺫﻟﻙ ﻟﻜﻭﻥ ﻫﺫﻩ ﺍﻟﻌﻭﺍﻤل ﻟﻬﺎ ﺘﺄﺜﻴﺭ ﻜﺒﻴﺭ ﻋﻠﻰ ﺘﻜﻭﻴﻥ ﺸﻜل ﺍﻟﻔﺭﺸﺔ ﺘﻡ ﺇﺠﺭﺍﺀ ﺘﺠﺎﺭﺏ ﻋﻤﻠﻴﺔ ﺒﻭﺍﺴﻁﺔ ﺁﻟﺔ ﻤﺨﺘﺒﺭﻴﺔ ﺘﻌﻤل ﺒﻤﺒﺩﺃ ﺍﻟﺤﺙ . ﺍﻟﻤﻐﻨﺎﻁﻴﺴﻴﺔ ﻭﺘﻜﻭﻴﻥ ﺍﻟﻀﻐﻁ ﻋﻠﻰ ﺴﻁﺢ ﺍﻟﻤﻌﺩﻥ ﺍﻟﻤﺸﻐل ﺍﻟﻤﻐﻨﺎﻁﻴﺴﻲ ﻭﺒﺎﺴﺘﺨﺩﺍﻡ ﺍﻟﻁﺭﻕ ﺍﻹﺤﺼﺎﺌﻴﺔ ﺘﻡ ﺍﻟﻭﻗﻭﻑ ﻋﻠﻰ ﺍﻟﺤﺎﻟﺔ ﺍﻟﻤﺜﺎﻟﻴﺔ ﻟﻘﻴﻡ ﺍﻟﻤﺘﻐﻴﺭﺍﺕ ﺍﻟﺜﻼﺜﺔ ﻭﺘﺄﺜﻴﺭﺍﺘﻬﺎ ﻋﻠﻰ ﺤﺎﻟﺔ ﺍﻟﺴﻁﺢ . ﻭﻤﻘﺎﺭﻨﺔ ﺍﻟﻨﺘﺎﺌﺞ ﻤﻊ ﻁﺭﻴﻘﺔ ﺍﻟﺘﺠﻠﻴﺦ ﺍﻟﺘﻘﻠﻴﺩﻴﺔ ﻭﺍﺜﺒﺎﺕ ﺃﻓﻀﻠﻴﺔ ﻫﺫﻩ ﺍﻟﻁﺭﻴﻘﺔ ﺒﺎﻟﻤﻘﺎﺭﻨﺔ ﻤﻊ ﻁﺭﻴﻘﺔ ﺍﻟﺘﺠﻠﻴﺦ Keywords: Magnetic abrasive finishing (MAF), characteristic of roughness, flat surface, coefficients of parabola, ferromagnetic abrasive powder, magnetic induction, running clearance, cutting speed, support curve. electromagnetic poles. Working motion is imported to the powder; the powder is pressed by magnetic field forces against working surfaces to finish it. The most important feature of this method is that the abrasive instrument has no bond; its function is performed by a magnetic flux in a working zone. These lead to arrange the cutting forces and also controlling the degree of elasticity by change of field strength [1-8] , via varying magnitude of the magnetic field in the machining zone, running clearance and the speed of rotation poles ( cutting speed) . INTRODUCTION At the present time, the magnetic –abrasive finishing method (MAF) is used in cleaning, grinding and polishing of flat surfaces in manufacturing engineering. The diagram of magnetic abrasive finishing of flat surface is represented in (Fig. 1). The MAF method based on the principle tha