Effect of Cutting Parameters in Machining Force, Surface Texture and Chips Morphology Obtained in Turning of Sintered Self-Lubricating Composites

Felipe Gustavo Ebersbach,José Daniel Biasoli De Mello,Rolf Bertrand Schroeter,Cristiano Binder,Sara Diaz Builes,Aloísio Nelmo Klein,Caroline Francisco Dorneles

doi:10.1590/1980-5373-mr-2020-0120

Felipe Gustavo Ebersbach, José Daniel Biasoli De Mello + Show 5 more

Open Access

https://doi.org/10.1590/1980-5373-mr-2020-0120

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Abstract

Abstract This work presents a study on effect of cutting parameters in force, texture and chips morphology obtained during the turning of a self-lubricating sintered composite. The tests were performed varying the cutting speed (vc = 100 and 200 m/min), feed (f = 0.1 and 0.2 mm), depth of cut (ap = 0.5 and 1 mm), as well as the materials manufacturing route in single pressing (SP) and double pressing (DP). The variation in the cutting parameters influenced the components of the machining force. The cutting, feed and passive force were approximately 10%, 10% e 25% higher, respectively, for DP materials. The turning process generated surfaces with values of maximum height (Sz) between 28.3 to 10.8 μm, Kurtosis (Sku) > 3 and Skewness (Ssk) < 0.3. The chip type obtained was segmented and the chip thickness ratio was influenced by the variation of the cutting parameters and the materials manufacturing route.

Highlights

Constant technological advances and the gradual increase in demands on the performance of materials are increasingly promoting the development of new materials with specific properties, for the most varied applications
The increase in cutting speed resulted in a reduction in the machining force components, regardless of the materials manufacturing route
The opposite behavior was verified with the increase of the feed and the depth of cut, which resulted in the increase of the cutting force, feed force and passive force, both for the single pressing (SP) and double pressing (DP) material

Summary

Introduction

Constant technological advances and the gradual increase in demands on the performance of materials are increasingly promoting the development of new materials with specific properties, for the most varied applications. Even with these advances, according to Binder et al.[1], the performance of mechanical systems is impaired mainly by the deficiency of lubrication, which provides a great waste of mechanical energy. Mechanical systems that use materials with low friction coefficient provide a decrease in energy consumption and at the same time increase the durability of the parts involved in the system, which reduces the rate of disposal

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