Analysis of the cutting fluid influence on the deep grinding process with a CBN grinding wheel

Ronaldo Yoshinobu Fusse,Eduardo Carlos Bianchi,Thiago Valle França,Rodrigo Eduardo Catai,Leonardo Roberto Da Silva,Paulo Roberto De Aguiar

doi:10.1590/s1516-14392004000300013

Ronaldo Yoshinobu Fusse, Eduardo Carlos Bianchi + Show 4 more

Open Access

https://doi.org/10.1590/s1516-14392004000300013

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Abstract

The application of cutting fluid in a deep grinding process is becoming more and more important, mainly where the cutting fluids are used as an "external" agent to the grinding conditions. The role of the fluid in grinding operations is in refrigeration of the workpiece, removal of the shavings, lubrication of the grinding zone, and refrigeration and cleaning of the wheel. The efficiency of a cutting fluid will depend mainly of the type of fluid that will be used. In this work, the influences of the type of cutting fluid used in a deep grinding process of the steel VC131 using CBN grinding wheel are analyzed. Three different types of cutting fluids were used: a vegetable emulsion, a synthetic solution and a integral oil. The variables analyzed during and after the grinding process were the grinding force, the superficial roughness, the acoustic emission (EA), the temperature of the piece and the G ratio (relationship between the volume of material removed from the piece and the volume worn off the grinding wheel). The integral oil showed the best performance relative to the following output variables: EA, cutting force and G ratio. The vegetal emulsion was the fluid that best dissipated heat from the cutting region.

Highlights

Grinding is a machining process employed for the attainment of tight tolerance and reduced roughness values (Ra from 0.2 to 1.6 μm)[2]
For each of the tested fluids, results were obtained for the following output variables: roughness, cutting tangential force, acoustic emission, temperature and G ratio
Analyzing the vegetal emulsion and synthetic solution, one observes that both have similar behavior with relation to the acoustic emission, without significant differences

Summary

Introduction

Grinding is a machining process employed for the attainment of tight tolerance (two-dimension tolerance between IT4 e IT6 and compatible geometric tolerance) and reduced roughness values (Ra from 0.2 to 1.6 μm)[2]. Due to the great number of variables involved, grinding is one of the most complex machining processes. The search for increased productivity and quality in recent years has led to great advancements in machining processes. Such advancements occur at the conventional operations as well as at the simplification of a component manufacturing sequence with the exchange from intermediate operations to finishing operations. The grinding wheel with outer diameter ds (mm), has cutting velocity vs, and penetrates into the workpiece with depth (a), (schematically) shown by Fig. 1

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