Laser-plasma composite cladding head and composite cladding method
AssigneeOcean University of China
InventorHongzhi Cui
Life of this patent
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Abstract
This application relates to a laser-plasma composite cladding head and a composite cladding method, and belongs to the field of surface processing of metallic materials. In the laser-plasma composite cladding head of this application, a ring laser beam is split into two half-ring laser beams through an upper roof lens to avoid a tungsten electrode. The two half-ring laser beams pass through a left 45° reflective lens to be coaxial with the tungsten electrode and then are integrated into a complete ring laser beam through a lower roof lens, thereby allowing a coaxial output of the ring laser beam and a plasma beam. This application integrates the advantages of laser cladding and plasma cladding and adopts coaxial compounding and synchronous powder-feeding.
Claims10
A laser-plasma composite cladding head, comprising:
- an optical fiber port receives a divergent laser beam transmitted by an optical fiber from a laser,
- a collimating lens collimates the divergent laser beam to produce a collimated laser beam;
- an upper tapered lens,
- a lower tapered lens, the collimated laser beam diverging through the upper tapered lens and the lower tapered lens to produce a ring laser beam;
- an upper roof lens,
- a left 45° reflective lens,
- a tungsten electrode, the ring laser beam first passes through the left 45° reflective lens to make a first optical path change by 90°, and then passes through the upper roof lens such that the ring laser beam is split into two half-ring laser beams to leave a gap for avoiding the tungsten electrode;
- a right 45° reflective lens, the two half-ring laser beams pass through the right 45° reflective lens to make a second optical path change by 90°, such that a direction of the second optical path is coaxial with a direction of the tungsten electrode;
- a lower roof lens configured to contract the two half-ring laser beams to produce a complete ring laser beam;
- a concentrating lens,
- a protective lens,
- a central ionized gas, and
- an anode nozzle having an outlet, where the complete ring laser beam is finally concentrated towards the outlet of the anode nozzle through the concentrating lens and the protective lens,
- wherein the central ionized gas is ionized between the anode nozzle and the tungsten electrode to produce a variable polarity plasma arc, then the variable polarity plasma arc is transferred to a position between the tungsten electrode and a workpiece to produce a plasma arc, and the plasma arc is mechanically compressed through a central hole of the anode nozzle to produce a plasma beam with a high energy density.
Dependencies are inferred from the claim text.