Estudo dos esforços de corte no processo HSM aplicado à abertura de cavidades / Study of the cutting forces in HSM process applied to pocket milling
AUTOR(ES)
Carlos Eiji Hirata Ventura
DATA DE PUBLICAÇÃO
2010
RESUMO
The manufacturing of a great number of components in the industry depends on molds and dies used in processes like forging, powder metallurgy, deep drawing, casting and plastic injection. One of the main operations for manufacturing of these parts corresponds to the opening of the initial pocket, from which more complex geometries are machined in order to obtain the negative face of the final product. As this is a rough operation, it is characteristic of the process high cutting forces and a significant tool wear. Aiming to reduce such variables and to improve the finishing (decreasing the time for semi- and end finishing), many entry- and internal cutting strategies have been proposed. In this context, the work will evaluate three different strategies for pocket milling by HSM method in AISI D2 steel, which are characterized by the used tool (I: high-feed mill, II: torus mill and III: plunge mill), cutting parameters, entry strategy (I: ramp, II: helical and III: plunge) and internal cutting strategy (I: spiral, II: zigzag and III: no cutting). In each of the mentioned strategies not just the tool life, but also the cutting forces in each interval of the pocket will be analyzed statically and dynamically. Moreover, it is also proposed a cutting force model for the different entry strategies, taking into account their peculiarities. It was noted that the main wear mechanism associated with all strategies corresponds to adhesion, which is closely related to the vibration in the process, excited mainly in the intervals where the tool touch the less rigid walls of the pocket. Considering the model, its usefulness in the evaluation of the average cutting forces was proved
ASSUNTO(S)
fresamento usinagem metais - corte milling machining metal
ACESSO AO ARTIGO
http://libdigi.unicamp.br/document/?code=000776080Documentos Relacionados
- Study of cutting forces in the edge milling process of sheets used on welded pipes manufacturing.
- Estudo teórico-experimental das forças de corte no processo de torneamento
- Avaliação do processo de usinagem com corte interrompido utilizando a análise de esforços e frequências.
- Influence of HSM milling cutting parameters on tribological performance of hardened AISI H13 steel.
- Evaluation of cutting forces and prediction of chatter vibrations in milling