Dissertations/Theses - Department of Industrial and Production Engineering
Browse
1 results
Search Results
Item Effects of high pressure coolant on machinability of steels(Department of Industrial and Production Engineering, BUET, 2009-12) Kamruzzaman, Md.; Dhar, Dr. Nikhil RanjanI-ligh production machining aLhigil culling speed and iCed rate generates lurge heat and high culling lemperature. which shortens the tool life and deteriorate, tile job qllality. Thi" problem becomes more aelile wh~n thcjob; nrc difficllh to macbin~ and arc to be lIsed under Jynamic loadillg. The conventional culling fluids nrc not that effcctive in ,uch high production machining parlicularly in continuous cultlng of mutcrials Iikc stcels. Further lhe convcntional culling fluids ure nol ~nvironll1entally friendly. The di,po~al of lhc culling tluid; oli.cn lead; LOlocal water pollution and soil contaminution. Recycling and rcu,e of convcntional cutting l1uids also lcad to otbcr problem,. M~cbining of sof\. ,t,cky ~lld dllctil~ l1l~lC";"I,yidd, long conllllUOUScbips and rapid tool wear due 10 inctrLcLcnl action of lh~ CUllingl1uisure coolant ;ystem increa,ed tool life by 30% to 75% whcn turning C-60 steel by SNMG in;CI't and 80% to 140% when machining by SNMM insert, Tile suri'ace qU"lity of the machined ,urfa~e imprQvcd po"ibly duc to 1e1o,crdumage of the C11(!ingtool no,e. In ordcr to implemcnt the high-pressure cQo[ant machining technology, an analyticalmodd for cutting temperature has been developed. It is fmmd that ac~orJing to the ,elccted cutting condilions in the model-bascd comparisons, the prcdicted cutting tcmperalllrc under high pressure coolant conditions is rcduccd as higb as about 18% eomp~red with tho"~ in dJ)' culling.