How to Improve 3D Printing Using Cold Spray Metal Deposition

A method for perfecting metal 3D printing by analyzing how spray angles affect material quality and adjusting the printer's path to fix errors.

What it covers

This patent describes a way to make 3D-printed metal parts more precise using cold spray technology. Instead of melting metal, cold spray uses high-speed gas to blast metal powder onto a surface. The inventors created a system that first prints a single test line to see how the spray angle affects the shape and internal defects of the metal. By measuring this test line, the system builds a mathematical model that predicts how the metal will build up. It then automatically adjusts the nozzle's path to ensure the final part matches the desired shape and has fewer structural flaws.

What it doesn't cover

• —Does not cover traditional laser-based additive manufacturing (like SLM or DMLS).
• —Does not cover deposition methods that rely on melting the material.
• —Does not cover systems that lack the step of generating a predictive model from a single-line test pass.
• —Does not cover manual path adjustment without the specific geometric and defect modeling described.

The clever bit

The system treats the spray nozzle's impact angle as a variable in a predictive model, allowing the software to compensate for the uneven 'plume' of particles that naturally occurs during spraying.

Why it matters

Cold spray is increasingly used for repairing expensive aerospace parts or creating high-strength components. Because cold spray is a physical impact process rather than a thermal one, it is hard to predict how layers will stack. This patent provides a systematic way to calibrate these machines, which is essential for industrial adoption where part failure is not an option.

Real-world examples

• 1.Repairing worn-out aircraft engine components
• 2.Additive manufacturing of large-scale structural metal parts
• 3.Applying protective metal coatings to industrial machinery