Yazar "Gullu, Abdulkadir" seçeneğine göre listele

Listeleniyor 1 - 3 / 3
  • Küçük Resim Yok
    Öğe
    An Investigation into the Influences of Grain Size and Grinding Parameters on Surface Roughness and Grinding Forces when Grinding
    (Assoc Mechanical Engineers Technicians Slovenia, 2010) Demir, Halil; Gullu, Abdulkadir; Ciftci, Ibrahim; Seker, Ulvi
    This study was carried out to investigate the effects of grain size on workpiece surface roughness and grinding forces when surface grinding AISI 1050 steel. A previously designed and constructed dynamometer was used to measure and record the forces developed during grinding. Grinding tests were carried out using different grinding wheels of different grains. Ground still ace roughness measurements were also carried out. The results showed that grain size significantly affected the grinding forces and surface roughness values. Increasing grain size and depth of cut increased the grinding forces and surface roughness values. For different grain sizes, depth of cuts of 0.01 and 0.02 mm did not result in any significant variations in the grinding forces but further increase in depth of cut led to variations of up to 50% in grinding forces. (C) 2010 Journal of Mechanical Engineering. All rights reserved.
  • Küçük Resim Yok
    Öğe
    AN INVESTIGATION INTO THE INFLUENCES OF GRINDING WHEEL HARDNESS AND GRINDING PARAMETERS ON SURFACE ROUGHNESS AND GRINDING FORCES
    (Gazi Univ, Fac Engineering Architecture, 2008) Demir, Halil; Gullu, Abdulkadir
    This study was carried out in order to examine the influences of grinding wheel hardness on surface roughness and grinding forces during surface grinding. Grinding tests were carried out using Al(2)O(3) grinding wheels with I, M and Q hardness grades at different table speeds and at different depth of cuts. AISI 1050 (50 HRc) and AISI 4140 steels (52 HRc) were used as the workpiece materials. In order to measure the grinding forces generated during grinding, the dynamometer previously designed and manufactured was used. This dynamometer was also connected to a personal computer to save the grinding force data. The roughness of surfaces were also measured. It is seen significant increases on surface roughness by increasing wheel hardness and grinding forces. The grinding operations carried out using grade I grinding wheels produced higher surface roughness and mean grinding force values by 53.5% and 59.8%, respectively, than those obtained by grade Q grinding wheel.
  • Küçük Resim Yok
    Öğe
    AN INVESTIGATION INTO THE INFLUENCES OF GRINDING WHEEL STRUCTURE ON SURFACE ROUGHNESS AND GRINDING FORCES
    (Gazi Univ, Fac Engineering Architecture, 2008) Demir, Halil; Gullu, Abdulkadir
    This study was carried out in order to examine the influences of grinding wheel structure on surface roughness and grinding forces during surface grinding. Grinding tests were carried out using Al(2)O(3) grinding wheels at different table speeds and at different depth of cuts. The structures of the grinding wheels were 3, 5 and 7. AISI 1050 steel (50 HRc) was used as the workpiece material. For measurement of the grinding forces developed during grinding, a previously designed and constructed dynamometer was used. This dynamometer was also connected to a personal computer to save the grinding force data. The ground surface roughness values were also measured. Increasing grinding wheel structure resulted in significant increases in surface roughness values. However, its influence on grinding forces was marginal. The highest cutting force was obtained when grinding using grinding wheel having the lowest structure at the highest depth of cut.