85 documents found, page 1 of 9
CFD and experimental investigation of channel diameter effects in structured in...
Costa, Sharlane; Capela, Paulina; Sousa, Maria; Hassui, Amauri; Ribeiro, J.E.; Pereira, Mário; Soares, DelfimEfficient cooling and lubrication are critical in grinding due to the high specific energy and limited contact area involved. Conventional external methods often fail to penetrate the air barrier formed by the rotating wheel, leading to excessive heat generation and reduced process stability. To overcome this limitation, this study investigates vitrified alumina grinding wheels with internal cooling channels de...
Grinding performance of a structural wheel with internal cooling channels
Costa, Sharlane Maria; Capela, Paulina Araújo; Ribeiro, João; Pereira, Mário; Soares, DelfimGrinding is a high-energy finishing process in which effective cooling is essential to control temperature, forces and surface integrity [1]. In conventional flood cooling, the coolant is applied externally and its action in the contact zone is often limited. Internally cooled grinding wheels with integrated channels provide an alternative approach by delivering the coolant directly to the grinding interface [2...
Tribological characterization of bi-functional abrasive composite
Capela, Paulina Araújo; Costa, Sharlane Maria; Correia, Márcia; Gomes, José; Teixeira, José Carlos; Pereira, Mário; Soares, DelfimAbrasive grinding wheels play a key role in industrial machining operations involving material removal and surface finishing, particularly in applications requiring high precision and strict surface quality. However, heat generation during grinding remains a challenge, as friction and cutting at the wheel–workpiece interface increase local temperatures, degrading workpiece properties and accelerating wheel wear...
Effect of coolant flow rate and depth of cut on grinding temperature using stru...
Costa, S.; Capela, Paulina Araújo; Ribeiro, J.; Pereira, M.; Soares, DelfimEffective control of heat and debris removal during grinding operations are crucial for process optimization. Various approaches are being studied to distribute adequately and efficiently the grinding fluid in the contact zone. This study evaluates an innovative methodology using grinding wheels with an internal network of “cooling channels” designed to deliver the grinding fluid directly from the wheel's core ...
Experimental and CFD simulation analysis of 3D cooling channels to improve the ...
Capela, Paulina Araújo; Costa, S.; Gomes, J. R.; Ribeiro, J.; Pereira, M.; Soares, DelfimEfficient heat and debris removal is essential to optimize the grinding process. A promising approach is the incorporation of three-dimensional channels in the grinding wheel to improve cutting fluid distribution. This study evaluates two types of grooved abrasive discs with spiral and hexagonal geometries, comparing them to a non-structured disc. In addition to experimental tests, Computational Fluid Dynamics ...
Performance of 3D-structured grinding wheels with multi-layer internal cooling ...
Costa, Sharlane; Capela, Paulina; Hassui, Amauri; Ribeiro, J.E.; Pereira, Mário; Soares, DelfimGrinding is a key machining process in industries that demand high precision and surface quality. However, the conventional flood cooling method is often ineffective due to the air barrier formed by the rotating wheel, which restricts fluid access to the contact zone. This causes thermal instability, high coolant use, and environmental impact. To overcome these limitations, this study investigates alumina grind...
CFD analysis of multi-layer cooling channels in three-dimensionally structured ...
Costa, Sharlane; Capela, Paulina; Hassui, Amauri; Ribeiro, J.E.; Pereira, Mário; Soares, DelfimMinimizing heat damage and surface integrity loss in grinding depends on effective cooling. Conventional techniques, however, suffer with low efficiency because of the fast air barrier restricting fluid access. Grinding wheels with internal cooling channels have been suggested to solve this; nonetheless, the impact of channel geometry and multi-layer topologies is yet unknown. This work investigates their effec...
PDMS porous microneedles used as engineered tool in advanced microfluidic devic...
Maia, Renata Patrícia Faria; Sousa, Paulo Jorge Teixeira; Pinto, Vânia Cristina Gonçalves; Soares, Delfim; Lima, Rui Alberto Madeira MacedoThe advancement of organ-on-a-chip (OoC), as end-use preclinical tool, has been slackened with the techno logical and engineering challenges that in-situ real-time monitoring of physicochemical and biological param eters still represent. In this study, the envisioned solution to surpass this challenge is the integration of a microneedle (MN) patch into a microfluidic device to collect cell culture media directl...
Enhancing lubrication efficiency in grinding wheels through internal channels s...
Costa, S.; Capela, Paulina Araújo; Ribeiro, J.; Pereira, M.; Soares, DelfimEffective control of heat and debris removal during grinding operations is critical for process optimization. The distribution of grinding fluids in the contact zone is being studied using different approaches (structured surfaces…). This study proposes an innovative methodology employing grinding wheels with an internal network of cooling channels designed to deliver grinding fluid directly from the wheel's ce...
Design of an experimental grinding machine for testing abrasive wheels with a 3...
Costa, S.; Araújo, P.; Capela, P.; Gomes, J. R.; Ribeiro, J.; Pereira, M.; Soares, DelfimPrecision manufacturing often utilizes grinding as a method to fabricate components with accuracy, enhanced surface quality, and desirable forming tolerances. The working conditions of a grinding machine and the attributes of the abrasive wheel play a crucial role in influencing the grinding process. Main challenges in grinding are related to heat dissipation, resulting in issues such as tool wear, increased fo...