Work

Preassembly Cryogenic Drilling in Carbon Fiber Sandwich Sheets with Inner Foam Core

Year: 2025

Type: article

Abstract: A study of cryogenic drilling in sandwich composites has been carried out. Materials used have been carbon fiber reinforced polymer sandwich sheets with inner foamed polyvinyl chloride core, composites with aerospace, marine, construction and automotive applications, including protec-tion structure of Polar engineering equipment. Experimental tests have been performed in lam-inates with 12 mm and 6 mm of thickness, drilling with liquid nitrogen as refrigerant to reach temperatures below -120ºC under different cutting conditions, in particular, drill rotation speeds between 2000 rpm and 6000 rpm and feed rates between 200 mm/min and 600 mm/min. Variables as thrust forces and circularity error have been measured, due to the importance of its effect on the hole quality, as an operation prior to a possible assembly. A design of experiments has been allowed determining relationships between variables, identifying the influence of cutting condi-tions on the thrust force and the circularity at inlet and outlet holes.

Source: Applied Sciences

DOI: 10.3390/app15052719

Authors: Rosario Domingo, Marta M. Marín, Néstor Rodríguez-Padial, Roberto Alvarez Fernández

Institutions: Universidad Nacional de Educación a Distancia, Universidad Nebrija

Language: English

Topic: Advanced machining processes and optimization

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,896

Funder: Ministerio de Ciencia e Innovación