6969

6511

كارشناسي ارشد

ساخت و توليد

اصفهان: دانشگاه صنعتي اصفهان، دانشكده مكانيك

1390

سيزده، 80ص.: مصور، جدول، نمودار

ص.ع. به فارسي و انگليسي

عليرضا فدايي تهراني

احسان ايمانيان، امين ا... محمدي

4/6/91

پيمان مصدق، عباس قائي

1396/09/18

كتابنامه

مكانيك

مهندسي مكانيك

ID6511

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

The Effects of Machining Parameters on Surface Roughness in Machining with new Driven Rotary Milling Tool David Imaniyan D imanian@me iut ac ir 1390 12 14 Department of Mechanical Engineering Isfahan University of Technology Isfahan 84156 83111 IranDegree M Sc language farsiAlireza Fadaei Tehrani mcjaft@cc iut irAbstractThe chip formation process in machining is accompanied by heat generation which influences themechanical and physical properties of both workpiece and cutting tool such as surface roughness and toollife High temperatures tend to accelerate thermal softening of the tool and subsequently lead to tool wear which are not desirable because they negatively impact the accuracy of the machined surface and tool life There are many approaches to minimize the impact of heat generation on tool life in metal cutting The firstapproach is to use a cutting fluid but its effectiveness is limited by its ability to penetrate between the tooland the chip and the use of cutting fluids is now being questioned regarding health terms One novelapproach is to remove the heat generated through a cooling cycle using in interrupted cutting The idea is toeither translate a wide tool to the side as it moves forward relative to the workpiece which allows fordissipation of heat throughout the body of the tool Rotary tool machining is a cutting process in which the cutting edge of a round insert rotates about its axis sothat a continuously indexed cutting edge is fed into the cutting zone Compared to a conventional stationarytool or non rotating circular tool rotary tool allows each portion of the cutting edge to be cooled betweenengagements and makes use of the entire circumference of the edge Insert rotation can be either externallydriven Driven Rotary Tool or generated by a self propelling action induced by chip formation Self Propelled Rotary Tool In this thesis a comprehensive study has been done on the previous works on cuttingtools and rotary tools According to the results of previous researches and our evaluations a new drivenrotary tool with the unique capabilities designed and manufactured as the cutting tool Primary tests weredone on the tool and then the parameters and their levels were determined The parameters are cutting speed feed rate and inclination angle and the effect of the parameters on surface roughness is evaluated For eachparameter three levels were determined Design of experiment was done by use of the full factorial designand the modeling is done by using of neural network and Matlab software The result shows that withincrease in the cutting speed the surface roughness decrease As inclination angle increases the surfaceroughness decrease and with increase in feed rate the surface roughness increase The thesis also presents acomparison of driven rotary tool self propelled rotary tool and fix tool in machining of the St 37 by use ofthree insert Results show that build of edge on fixed tool edge has the highest height and in self propelledrotary tool is higher than driven rotary tool It was also observed that there are some cracks on fixed tool rakeface and there were not any crack on self propelled and driven rotary tool rake face KeywordDriven rotary tool Rotary speed of the insert Inclination angle Cutting speed Surface roughness

عليرضا فدايي تهراني

احسان ايمانيان، امين ا... محمدي

پيمان مصدق، عباس قائي