Fig. 1 A precision abrasive waterjet process removing thermal barrier coating from a turbine blade component [ 6 ] (Permission to reprint from Modern Machine Shop © 2022) More

Fig. 2 The side view of the SPH model for the TBC layer removal using the AWJ process. The abrasive particles in the water jet are enlarged to show their existence. The inset shows the three-dimensional (3D) view of the SPH model. More

Fig. 3 Impact pit hole ( a ) model prediction in this work. The inset in ( a ) is the simulated 3D view, ( b ) experimental microstructure [ 8 ]. More

Fig. 4 The cross-sectional profiles of the impact pit holes with different incident angles: 30 deg, 45 deg, 60 deg, and 90 deg. ( a ) Simulated results from this study, ( b ) experiment result from Ref. [ 8 ]. Water jet direction is toward the left. More

Fig. 5 Pit hole depth's dependence on the vertical velocity component ( Vz ). The fitted curve using the second-order polynomial is also shown. More

Fig. 6 Cross-sectional views of impact pit hole profiles with abrasives for both the simulated results in this study and the experiment results in Ref. [ 8 ]. Water jet direction is toward the left. More

Fig. 7 Cross-sectional views of the pit holes at different impacting times: ( a ) simulation results; ( b ) experiment results [ 8 ]. The curved arrows show the deepest points gradually shifting to the right as the AWJ process proceeds, due to 30 deg of incident angle. More

Fig. 8 Simulated erosion rates at different water jet incident angles. The analytical model [ 24 ] is also included for comparison. More

Fig. 1 Gantry-type five-axis CNC machining center equipped with different motorized spindle units (SP1, SP2, and SP3) More

Fig. 2 Experimental setup per ISO 230-3 and implementation in a five-axis CNC machining center More

Fig. 3 Spindle bearing temperatures during 500 rpm tests More

Fig. 4 Spindle motor temperatures and ambient temperatures during 500 rpm tests More

Fig. 5 Thermally induced displacements in the Z -direction of five-axis CNC machining centers equipped with three different spindle units during 500 rpm tests More

Fig. 6 Spindle bearing temperatures during 9000 rpm tests More

Fig. 7 Spindle motor temperatures and ambient temperatures during 9000 rpm tests More