Laser Cladding Nozzle with Vacuum Port for Powder Delivery
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Solution Overview
Problem
Existing laser cladding nozzles are inefficient in delivering powdered metal to the weld zone, as most of the gas flow is deflected away, resulting in significant loss of powdered metal during the process.
Innovation Solution
A laser cladding device with a nozzle design that incorporates a vacuum port adjacent to the delivery port, creating a negative pressure zone to draw powdered metal and inert gas towards the central axis, increasing the amount of material deposited at the weld zone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If a conventional concentric nozzle design is used, then the laser beam can pass through the center, but the majority of gas flow is deflected away from the weld zone causing significant loss of powdered metal
Solution Approach 1:
The nozzle is divided into multiple functional zones: an inner concentric nozzle for laser beam transmission and an outer vacuum nozzle with multiple ports (delivery port, coating port, vacuum port) arranged in specific patterns. This segmentation allows independent optimization of each zone's function to improve overall powder delivery efficiency.
Solution Approach 2:
A vacuum field is introduced as an intermediary force between the coating material and the weld zone. The vacuum port creates negative pressure that actively draws powdered metal through the delivery port and toward the weld zone, replacing passive gas flow with active vacuum-assisted transport.
2Quantity of substance
If gas flow is used to carry powdered metal, then material can be delivered to the weld zone, but most gas flow is deflected away resulting in material escape
Solution Approach 1:
The conventional positive pressure gas flow system is replaced with a vacuum-based system. Instead of relying on gas flow to carry powder (which gets deflected), a vacuum field is used to actively suction powder through the delivery port and guide it toward the weld zone, providing more controlled and efficient material transport.
Solution Approach 2:
Instead of using outward-directed gas flow to deliver powder (conventional approach), the invention uses inward-directed vacuum suction to draw powder through the delivery port and toward the weld zone. This inversion of the flow direction fundamentally changes how material is transported and retained in the weld zone.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design significantly enhances the deposition of powdered metal at the weld zone, reducing waste and improving metallurgical quality by ensuring more material is directed to the intended area, thereby increasing the efficiency and effectiveness of the laser cladding process.
Implementation Method 1
a vacuum port at one end of the vacuum channel, wherein the vacuum port is positioned generally adjacent the delivery port. In operation the vacuum port draws a vacuum, pulling the coating towards the part.
Implementation Method 2
creating a negative pressure zone to draw powdered metal and inert gas towards the central axis
Implementation Method 3
A laser beam travels down a passage to exit out a port in focused alignment with a flow of powdered metal
Implementation Method 4
The laser melts both a thin layer of a surface of a part and the metal powder introduced to the surface
Implementation Method 5
the powdered metal carried by an inert gas
Data Source
AI summary
A laser cladding device for applying a coating to a part comprising a laser which can generate laser light, which is adapted to heat the coating and the part, a main body defining a laser light channel adapted to transmit the laser light to the part, a coating channel adapted to transmit the coating to the part, and a vacuum channel and a nozzle having an exit. The nozzle comprises a delivery port at one end of the laser light channel, a coating port at one end of the coating channel, and a vacuum port at one end of the vacuum channel, wherein the vacuum port is positioned generally adjacent the delivery port In operation the vacuum port draws a vacuum, pulling the coating towards the part.