THE INFLUENCE OF CUTTING MILLING PARAMETERS ON SURFACE ROUGHNESS FOR PRETREATED MOLD STEELS

Cristian - Eusebiu POPESCU, Adrian BUT

Abstract


The main objective of this paper is to experimentally analysis the influence of the 3d milling cutting parameters on the surface roughness for the new pretreated material 1.2714HH used in the execution of the active parts (injection cavities) for the injection molds. The main advantage of the 1.2714 HH steel is the increased hardness (39-45 HRC) by approximately 10 HRC units compared to 1.2312 (29-34 HRC). The experimental analysis has as its starting point the pretreated steel 1.2312, a steel widely used and analyzed in the execution of the active parts of plastic injection molds. Based on the resulting experimental data, at identical milling parameters, the difference in hardness of the 2 materials (10 HRC units) did not drastically influence the surface roughness. The stepover (width of cut) ae[mm] have an important influence on the surface roughness also for the same material, but also for the both types of pretreated steels.

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