Análise comparativa entre ferramenta da linha standard e ferramenta especial no fresamento de aço inox

Abstract

Due to the increasingly fierce competition in the market for the supply of machining tools, the evolution and constant improvement linked to new manufacturing technologies has become indispensable. Cost-effectiveness and service life are closely controlled by special tool customers, which have a higher added value than simple catalog tools. This work aims to make a comparison between a standard tool and a special tool in rough milling of 420 stainless steel, applying unequal helices between its grooves, unequal division, and some specific geometry changes in the special tool. The method used was corner milling at 90 degrees, in the concordant direction with passing movements through the test body. The tools were tested under three different machining conditions, with stops every 5,55 linear meters of material removed to measure the flank wear mark. The established criterion for end of life was vb máx=0,2 mm. In the condition recommended by the manufacturer's catalog they had the same performance, in a severe machining condition the two models suffered early chipping, however in an intermediate condition the special tool had a significant difference in its useful life in relation to the standard tool. It was concluded that a combination of factors resulted in an increase in the stability of the tool proposed at work, which proved to be effective for the process. [resumo fornecido pelo autor]