Caracteristicas do processo de torneamento de materiais endurecidos

AUTOR(ES)
DATA DE PUBLICAÇÃO

2001

RESUMO

This work studies the texture and surface integrity of termical by treated workpieces. In surface texture, it had been analyzed the surface finishing, considering the main parameters of surface roughness and the alse cylindricity and circularity. Concerning the study of the surface integrity, this if withheld in analyzing the microstructural hashing and the leveI of residual stress generated by the process, as much in the surface how much in subsurface layers of the machined workpiece. The work was carried through in a manufacturing company and had as workpieces, gears used in automotive s gear Box of ABNT 8620 steel. The machine tool used in the workpieces machining was a vertical turning center specialy projected for hard materials process turning. It was used as tool, CBN s inserts. The obtained results shows that the process is able to produce parts that take care of the requirements of design of the gears, that the average roughness Ra in 0.4 mm limits; the error of form is remained in the levei of that one gotten with the grinding process; the heat generated in the surface of the machined workpiece part is able to produce a microstructural alteration in the layers superficial and subsurface of the machined part and generated residual stresses of traction and compression in both of them

ASSUNTO(S)

acabamento processos de fabricação metalurgia de transformação

ACESSO AO ARTIGO

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