Fig. 1. Morphology of removal function generated by normal fixed-point incidence modes. (a) Vertical incidence; (b) oblique incidence

Fig. 2. Schematic of principle. (a) Rotary sweeping under oblique incidence; (b) material removal

Fig. 3. Spot-taking results at fixed point under different incidence angles. (a) 75°; (b) 60°; (c) 45°

Fig. 4. Schematic of material removal under oblique incidence for intersection point at different positions. (a) Beneath workpiece surface; (b) on workpiece surface; (c) above workpiece surface; (d) above workpiece surface and no overlap of material removal

Fig. 5. Schematic of rotary sweeping method used for calculating material removal profile

Fig. 6. Semi-profiles. (a) Rotational axis at O; (b) rotational axis at O1; (c) rotational axis at O2; (d) rotational axis at O3; (e) rotational axis at O4; (f) rotational axis at O5

Fig. 7. Structural diagram of jet nozzle

Fig. 8. Adjustment for position and angle of jet nozzle

Fig. 9. Results of surface shape measurement of spot-taking workpiece

Fig. 10. Surface shapes and intersection profiles of different spots. (a) No. 1; (b) No. 2; (c) No. 3; (d) No. 4; (e) No. 5; (f) No. 6; (g) No. 7; (h) No. 8; (i) No. 9

Fig. 11. Comparison among intersection profiles of spot No. 6 along different directions. (a) Position diagram; (b) profile

Fig. 12. Straight groove processed based on the corresponding parameters of spot No. 6 (a) Two-dimension; (b) three-dimension

Fig. 13. Comparison among intersection lines at different positions of straight groove. (a) Position diagram; (b) section line