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Experimental inquiry on chip formation in the machiningof ABNT 1045 steel and nodular casting iron

by da Silva, Márcio Aurélio

Abstract (Summary)
The chip formation is influenced by several cut parameters which also affectthe forces, tensions, powers and temperatures generated during the machiningprocess. Although they have been studied for more than 100 years, still today, theinvolved mechanisms of deformation are not totally know, due to the fact that the chipformation involves high temperatures and high levels of deformation. This researchaims at studying the basic process of chip formation, as well as the influence of themain cut parameters such as cutting speed, feed rate, cutting fluid, tool coating andmachined material, besides determining the force of residual cut for ABNT 1045steel. The inquiry was based on the classification of the chips concerning their typeand form, thicknesses values, shear angles, stresses degree and in the monitoring ofthe cutting forces. Micrographs and measurement of the chips microhardness weremade in order to achieve a detailed structural analysis.The results found have shown that the parameters and analyzed conditionsreally influenced the formation of the chips, being the feed rate more significant thanthe cutting speed. The tool coating and the cutting fluid had a great influence on thechip formation as well as on the cutting forces during the machining of ABNT 1045steel and nodular casting iron. The residual cutting force for the ABNT 1045 steelvaried between 45 N and 52N.
This document abstract is also available in Portuguese.
Bibliographical Information:

Advisor:Álisson Rocha Machado; Éder Silva Costa; Márcio Bacci da Silva

School:Universidade Federal de Uberlândia

School Location:Brazil

Source Type:Master's Thesis

Keywords:Turning Machining Residual cutting force

ISBN:

Date of Publication:04/29/2008

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