Improvement of machinability of steel during turning operation by magnetic cutting

Mahmood, Mohammad  Nauzef

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dc.contributor.author	Mahmood, Mohammad Nauzef
dc.date.accessioned	2018-10-04T05:30:22Z
dc.date.available	2018-10-04T05:30:22Z
dc.date.issued	2012-11-15
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dc.identifier.uri	http://hdl.handle.net/123456789/277
dc.description.abstract	This study presents the results of an investigation of machinability improvement in turning of mild steel (0.25% C) by magnetic cutting. Turning experiments were done by using a precision lathe both without application of magnetic field and with the application of magnetic field. The external magnetic field was implemented using two different magnetic setups: one created by permanent magnet another by electro magnet. Poor machinability results in surface defects and dimensional inaccuracy of the work piece as well as reduction of useful tool life and damage to machine. A recent and promising way to improve the machinability of steel is to reduce the vibration effect of machine-tool-work system by applying external damping effect using magnetic cutting technique. In this investigation the effect of external magnetic field (both permanent magnet and electromagnet) was evaluated on machinability parameters such as tool life, surface roughness, cutting temperature and cutting force. The characteristics of chip produced during turning were also observed to further study the magnetic effect on cutting mechanism. Improvements in tool life, reduction in average surface roughness, increase in cutting temperature and decrease in cutting force were observed during the experimentation by magnetic cutting. Certain changes of chip formation characteristics were also observed when the mild steel was being cut. It has been observed that the chip serration nature has been changed significantly in magnetic cutting. Experiments were carried out by changing cutting speed and depth of cut to determine the optimal magnetic field to be applied which would translate into greatest amount of benefits. Due to the limitation of feed variation within the existing facilities of lathe, the feed value was kept constant at 0.095 mm/rev. The observations of effect of magnetic field on machinability parameters, lead to the conclusion that magnetic cutting improves the machinability factors of mild steel significantly and further enhance the possibility of using magnetic effects to reduce machining costs.	en_US
dc.language.iso	en	en_US
dc.publisher	Department of Electrical and Electronic Engineering, Islamic University of Technology	en_US
dc.title	Improvement of machinability of steel during turning operation by magnetic cutting	en_US
dc.type	Thesis	en_US