MQL with water in cylindrical plunge grinding of hardened steels using CBN wheels, with and without wheel cleaning by compressed air

Autor(es)

Ruzzi, Rodrigo de Souza ; Belentani, Rafael de Mello ; de Mello, Hamilton Jose ; Canarim, Rubens Chinali ; D'Addona, Doriana M. ; Diniz, Anselmo Eduardo ; de Aguiar, Paulo Roberto ; Bianchi, Eduardo Carlos

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY; v. 90, n. 1-4, p. 329-338, APR 2017.
• Citações Web of Science: 11

Resumo

Minimum quantity of lubricant (MQL) in grinding is an alternative for reducing abundant fluid flow and both environmental and health hazards when compared with conventional fluid application. In spite of the fact that MQL is considered an innovative cost-effective and environmentally friendly technique, when used in grinding its inadequate application can increase cutting temperature and wheel clogging, worsening surface roughness, and increasing geometric and dimensional errors. The present study aims to evaluate improvements in MQL in grinding using MQL + water (1:1, 1:3, and 1:5 parts of oil per parts of water), when compared to MQL without water and conventional cooling-lubrication technique. Wheel cleaning by compressed air was also tested, aimed for unclogging of the wheel pores. The tests were performed in a plunge cylindrical grinder with CBN wheel and workpieces of AISI 4340 for different feed rates. The ground workpieces were analyzed with respect to the surface roughness, roundness errors, microhardness, and microscopic changes. In addition, tangential cutting force and diametric wheel wear were investigated. The results observed for the MQL plus water in the proportion of 1:5, with wheel cleaning system (at 30A degrees inclination angle of the air nozzle) were the best, when compared to MQL without water, and close to the conventional flood coolant, implying that this technique is a potential alternative for cooling-lubrication when applied properly. (AU)

• Processo FAPESP: 09/50965-7 - Utilização da mínima quantidade de lubrificante (MQL) com água no processo de retificação cilíndrica externa de mergulho em aços endurecidos com rebolos de CBN
• Beneficiário: Eduardo Carlos Bianchi
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 09/50964-0 - Utilizacao da minima quantidade de lubrificante (mql) com agua no processo de retificacao cilindrica externa de mergulho em acos endurecidos com rebolos de cbn
• Beneficiário: Rafael de Mello Belentani
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica