Experimental studies of the cutting force and surface morphology of explosively clad Ti–steel plates

• Thrust force and torque in drilling process of explosively clad Ti–steel plates.
• Signal waveform of thrust forces vs. length of cut for different drilling tools.
• Power Spectral Density for thrust force in machining process of titanium and steel clad.
• Surface morphology of drilled samples.
• Topography parameters of drilled holes.

The present work pertains to the study of clad material such as titanium plated steel in drilling process. The study was conducted for two types of indexable insert drills with different configuration of the tool coatings (TiAlN/AlTiN + TiN and TiAlN/TiN), the same geometry of insert and fixed machining conditions. Drilling process was assessed by the analysis of thrust force, torque and signal fluctuations of PSD function. In this context, surface morphology of the drilled holes and contact area was analysed. It has been observed that the use of the PSD function allows assessment of the drilling process in different layers of clad materials. Also was found that the parameters of the surface morphology are dependent upon the type of layers of the clad and the type of drill. Furthermore the reduction in torque results in obtaining smaller values of surface roughness parameter especially in the area of volume parameters of the bearing area curve.

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