Abstract
During the manufacture of a mould, machining is certainly the most important process. The composition required to provide important properties in the steels used, such as hardness, wear and corrosion resistance, results in a low machinability has resulted in a low volume of material removed by the end of life of the cutting tool, due to the strong wear generate. In this study, we investigated the behavior of steel processing VP 100 is used in manufacturing plastic injection molds. To this end, we used two versions of VP100, one with 270 and another with 350 parts per million (ppm) of titanium. The tests comprise six different cutting conditions in end milling operations. We observed the volume of material removed for each tested condition, considering the evolution of flank wear of tools to a maximum of0.5 mm. Steel VP 100 with 350 ppm of Ti showed a higher volume of material removed in five of six tests showing that, in this case, a higher content of titanium improved the machinability of the steel under study.
Highlights
The molding industry plastic injection constitutes a growing sector due to the widespread use of plastic parts in other sectors
This study aims to compare the machinability of steels VP 100 with 270 and 350 ppm of titanium used in the manufacture of plastic injection molds
The machinability in this case is expressed by analyzing the volume of material removed and the flank wear of the cutting tools in end milling operations
Summary
The molding industry plastic injection constitutes a growing sector due to the widespread use of plastic parts in other sectors These molds are manufactured from castings steel bars and laminated whose cavities are generated by machining operations which represent the greatest part of the time of manufacture and the final cost of the mold. The improvement of response variables such as tool life, cutting forces, surface roughness can result in a significant improvement in machining operations costs through the optimization of cutting parameters such as feed, cutting speed and depth of cut. This optimization can lead to a greater volume of material removed during machining, thereby minimizing manufacturing costs of the mold (AMIN et al, 2007)
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