Full text
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| Author(s): |
Carlos Eiji Hirata Ventura
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | Campinas, SP. |
| Institution: | Universidade Estadual de Campinas (UNICAMP). Faculdade de Engenharia Mecânica |
| Defense date: | 2010-10-14 |
| Examining board members: |
Amauri Hassui;
Anselmo Eduardo Diniz
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| Advisor: | Amauri Hassui |
| Abstract | |
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 (AU) | |
| FAPESP's process: | 08/07518-7 - Monitoring of the HSM process applied to the pocket milling of the AISI D2 steel |
| Grantee: | Carlos Eiji Hirata Ventura |
| Support Opportunities: | Scholarships in Brazil - Master |