Investigation of experimental research of the effect tool holder modification cause on the surface quality

INVESTIGATION OF EXPERIMENTAL RESEARCH OF THEEFFECT OF TOOL HOLDER MODIFICATIONS HAVING AVIBRATION CAUSE ON THE SURFACE QUALITY(M. Sc. Thesis)Engin Murat BAHARGAZİ UNİVERSTYINSTUTE OF SCIENCE AND TECHNOLOGYSeptember 2006ABSTRACTIn this study; the effect of vibration occured in MTJNR 2525 M16 tool holder,used in lathe workbench, to surface roughness is analysed. For this study threeMTJNR 2525 M16 tool holder which is produced by TAKIMSAŞ company withSAE1040 steel material is used. While one of the tool holder is kept original andthe others, one of them is vertical and the other is horizontal, cut into as ?Z?shape in the wire erosion workbench to absorb the vibration occuring in theirupper surface and an aluminium plate has placed between parts. The surfaceroughness values obtained by doing tests under the same cutting conditions withthese three different tool holders are compared. For tests; cutting speed (Vc)100 m/min, sawdust depth (a) 1 mm, and feeding (s) 0,2 mm/rev is chosen. Testsare effected by removing sawdust from upper surface 100mm part for eachprocess of SAE1040 steel materials, 50mm diameter and 300mm length. Afterthe tests, surface roughness values of parts operated with each tool holder ismeasured as 5,27µm, 5,56µm and 6,39µm. It was seen that the surfaceroughness of sample which was turned by modificated sample is better quality.Also during the test the cutting force that occurs while removing sawdust (Fc),feeding force (Ff) and the passive force (Fp) are measured with KISTLER 9257bpiesoelectronic dynamometer for each cutter. After measurements when theforces of first (original) sample are measured as; Fc= 500N, Ff=281N and Fp=257N, and the forces of the modificated cutter sample 2 number (horizontal cut)is measured Fc= 552N, Ff= 340N and Fp= 303N, 3 number (vertical cut) ismeasured Fc= 502N, Ff= 317N and Fp= 262N.Science code : 708Keywords : Vibration, Cutting force ,Surface roughnessPage Number : 76Adviser : Assist. Prof. Dr. Abdullah DURAN