VARIASI KECEPATAN PEMOTONGAN PROSES PEMBUBUTAN BAJA AISI 4140 TERHADAP KEAUSAN DAN UMUR MATA PAHAT KARBIDA
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Abstract
In the machining process, increased production can be done by increasing the use of cutting
parameters. However, the use of high cutting parameters has an effect on the wear of the cutting tool
used. The aim of this research is to analyze the wear and tear that occurs on cutting tools and tool life
when cutting AISI 4140 steel by using variations in cutting speed. The machining process uses a CNC
lathe by turning the surface of the AISI 4140 steel workpiece. The wear criteria are determined when the
cutting tool has reached the edge wear limit (VB) of 0.3 mm. Observation and measurement of carbide
cutting tools are carried out every 5 minutes the machining process is carried out. If the cutting tool has
not shown the specified wear value, then the cutting tool then cuts, so that the wear value is obtained.
From the research conducted it was found that at a cutting speed of 160 m / min the cutting tool is
capable of cutting for 39 minutes, 13 seconds. At a cutting speed of 180 m / min the cutting tool is capable
of cutting for 38 minutes, 14 seconds. At a cutting speed of 200 m / min the cutting tool is capable of
cutting for 33 minutes, 8 seconds. At a cutting speed of 240 m / min the cutting tool is capable of cutting
for 26 minutes, 3 seconds. Taylor's advanced tool life for the coated carbide cutting tool in turning AISI
4140 steel material is: Vc. Tl.0.073 = 8203.
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