This paper presents the results of studying the effects of various types of cooling lubricant to the quality of surface grinding of 90CrSi steel by Hai Duong grinding wheel. The experimental results show that the grinding forces and the surface roughness significantly reduced when applying suitable cooling regimes. | Lưu Anh Tùng và Đtg Tạp chí KHOA HỌC & CÔNG NGHỆ 139(09): 37 - 40 EFFECT OF COOLANT TYPES ON GRINDING FORCE AND SURFACE ROUGHNESS IN SURFACE GRINDING 90CrSi STEEL Lưu Anh Tùng1, Vũ Ngọc Pi1*, Nguyễn Thị Thu2, Bành Tiến Long3 1 College of Technology – TNU, 2Viet Duc Industrial College, Thái Nguyen, 3 Ha Noi University of Science and Technology SUMMARY In grinding process, the temperature produced in the grinding zone is high. This is because the process can be described as a cutting operation of a large number of cutting edges with high cutting speeds. For that reason, selection of suitable grinding fluid as well as cooling regimes are the subject of numerous studies on grinding general and in surface grinding. This paper presents the results of studying the effects of various types of cooling lubricant to the quality of surface grinding of 90CrSi steel by Hai Duong grinding wheel. The experimental results show that the grinding forces and the surface roughness significantly reduced when applying suitable cooling regimes. Keywords: surface grinding, coolant, grinding force, surface roughness INTRODUCTION* Grinding process remove workpiece material by abrasion which can generate an extremely high amount of heat. That is the reason of high temperature, thermal damage to the workpiece and the reduction of the grinding accuracy. In grinding, the cooling lubricant can reduce the friction between the abrasive grain and the workpiece and between the bond and the workpiece [1]. Also, it can cool the contact zone and the workpiece surface by absorbing and transporting heat [1]. Therefore, there are many studies have been done on coolant and using it in grinding. T. Nguyen and . Zhang have carried out a study on mechanisms of coolant penetration into the grinding zone associated with both the segmented and conventional grinding wheels [2].The influence of high-pressure coolant jet on chip formation mode, grinding zone temperature and surface roughness in grinding .
