Eventos Anais de eventos
COBEF 2017
Congresso Brasileiro de Engenharia de Fabricação
ESTUDO DA FURAÇÃO EM ALTAS VELOCIDADES DE CORTE EM LIGAS DE Al-Si USANDO FERRAMENTAS DE AÇO RÁPIDO E METAL DURO
Submission Author:
Paulo Sergio Martins , MG
Co-Authors:
Jose Rubens Gonçalves Carneiro, Gilmar Cordeiro da Silva, Paulo Sergio Martins, Soraia Sandra Pires Ferreira, Gustavo Henrique Nazareno Fernandes
Presenter: Paulo Sergio Martins
doi://10.26678/ABCM.COBEF2017.COF2017-1194
Abstract
New cutting tool technologies, geometries, materials and coatings applied on different substrates demonstrate an increased mechanical strength, also an improvement on over the fluidity on tool chip interface, and an increasement in cutting speed during the machining. Advanced characterization techniques are used to analyze tool substrate. In the automotive industry, steels and cast iron have been gradually replaced by materials of lower density, better machinability and better cost-effectiveness. Al-Si alloys have gained space and are used in heads, gearboxes and engine block. Holes are present in almost all automotive mechanical parts with different diameters and depths, making them necessary to be machined in the shortest possible time within narrow tolerance ranges, shape and roughness. This work evaluated the drilling of a die-cast Al-Si alloy using high-speed steel and carbide drill as tool. The cutting speeds were of 340, 360, 380, 430 m/min and feed rate was of 0.36 mm/rev. It was used pre-drilled parts removing 0.7 mm of overmold in diameter. The geometric evolution of the hole surface was evaluated measuring roughness parameters Ra, Rz and Rt for the cutting speeds of 340, 360, 380 and 430 m/min. Behavior of the fast steel drills presented good results in the machining process, at a speed of 430 m/min. Hard carbide drills showed good results at all speeds tested.
Keywords
Broca de Aço Rápido, e Metal Duro, Altas Velocidades de corte, Superfícies tribologias. Carcterização dos Materiais das Ferramentas, Broca de Aço Rápido, e Metal Duro, Altas Velocidades de corte, Superfícies tribologias. Carcterização dos Materiais das Ferramentas, Broca de Aço Rápido, e Metal Duro, Altas Velocidades de corte, Superfícies tribologias. Carcterização dos Materiais das Ferramentas, Broca de Aço Rápido, e Metal Duro, Altas Velocidades de corte, Superfícies tribologias. Carcterização dos Materiais das Ferramentas, Broca de Aço Rápido, e Metal Duro, Altas Velocidades de corte, Superfícies tribologias. Carcterização dos Materiais das Ferramentas, Broca de Aço Rápido, e Metal Duro, Altas Velocidades de corte, Superfícies tribologias. Carcterização dos Materiais das Ferramentas
