Estudo do fresamento de cabeçotes de motor mistos de alumínio e aço com diferentes ferramentas de corte

Abstract

The milling of heads with antechamber is a process of manufacture of extreme difficulty and importance, because the head is a complex part, with several holes, characterizing a machining with interrupted cut, and needs great finishing to work efficiently. One of the consequences of this type of milling is the high wear of the inserts used, due to the type of cut and the variation of the raw material of the head. The result of this high wear is the poor surface finish on the head, as well as the frequent changing of the cutting tool at each machining pass. The use of the cutting insert which generates a surface with good workmanship and the least possible wear is a recurring problem in the field of engine grinding. The objective of this work was to select inserts that were capable of machining aluminum and steel efficiently, suffering the least possible wear, and generating a surface with a good finish. The wear of the inserts and the finishing of the machined surface of the head were analyzed visually with the variation of the machining advance, being the only parameter that the machine used allowed to be varied. The use of the insert RDMT 1003 MO LT3000, was the most satisfactory for the needs of the company, in relation to the surface finish of the head and wear of the same.