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Analysis of cylindrical grinding of VP50 steel with application of MQL and aluminum oxide wheel

Grant number: 21/08549-8
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): October 01, 2021
Effective date (End): September 30, 2022
Field of knowledge:Engineering - Mechanical Engineering - Manufacturing Processes
Principal researcher:Eduardo Carlos Bianchi
Grantee:Benício Nacif Ávila
Home Institution: Faculdade de Engenharia (FE). Universidade Estadual Paulista (UNESP). Campus de Bauru. Bauru , SP, Brazil

Abstract

Currently, companies are increasingly seeking to improve the efficiency of processes in order to ensure their market competitiveness. In industry, this need for optimization arises from the manufacture of new materials and products, aligned with sustainable and safe techniques. In this perspective, VP50 steel is a material manufactured especially for the production of molds for the injection of thermoplastics. However, the final machining of this steel, especially its grinding, can become difficult and highly costly. Therefore, it is essential to determine the best grinding conditions for this steel. The application of cutting fluids during machining can bring good results to the final surface, however, financial expenses and damage to the environment and health of operators must be taken into account. In this sense, the minimum quantity lubricant (MQL) technique is a good alternative to reduce these disadvantages, as it uses a small amount of cutting fluid associated with a jet of compressed air. Another alternative is to machine the material at low feed rates, which improves surface finish despite the longer manufacturing time. Thus, this research aims to evaluate the performance of grinding steel for VP50 mold under the MQL technique and the conventional lubri-refrigeration method, using the aluminum oxide (Al2O3) grinding wheel and three feed rates: 0.25; 0.50, and 0.75 mm/min. The output variables studied will be surface roughness (Ra), roundness error, diametral wheel wear (G-ratio), microhardness (HV), optical microscopy, tangential cutting force, and acoustic emission. Finally, this work aims to expand knowledge in the field of grinding, especially in the grinding of steel for molds, which is still a scarce topic in the abrasive industry, in addition to promoting the expansion of science and advancement in solving society's problems. (AU)

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