| 摘要 |
<p>A treatment jet or beam (19), e.g. from a high velocity oxygen-liquid fuel (HVOF) spray gun (17), has an axis (18) intersecting the surface of a rotor (4) at a given point (21). The rotor (4) has a profile which progresses helically along it. The point (21) is traversed along the rotor (4) while keeping the point (21) at the same position on the rotor profile. In particular the jet axis (19) is moved parallel to the rotor axis (22) while the rotor (4) is rotated in synchronism.</p> |
