Publication | Structural and Multidisciplinary Optimization 2020

A subtractive manufacturing constraint for level set topology optimization

This research shows our commitment to providing our customers with practical tools that will enable efficient structural designs that importantly can be manufactured with traditional manufacturing methods such as CNC milling.

Download publication

Abstract

A subtractive manufacturing constraint for level set topology optimization

Nigel Morris, Adrian Butscher, Francesco Iorio

Structural and Multidisciplinary Optimization 2020

We present a method for enforcing manufacturability constraints in generated parts such that they will be automatically ready for fabrication using a subtractive approach. We primarily target multi-axis CNC milling approaches but the method should generalize to other subtractive methods as well. To this end we take as user input: the radius of curvature of the tool bit, a coarse model of the tool head and optionally a set of milling directions. This allows us to enforce the following manufacturability conditions: (1) surface smoothness such that the radius of curvature of the part does not exceed the milling bit radius, (2) orientation such that every part of the surface to be milled is visible from at least one milling direction, (3) accessibility such that every surface patch can be reached by the tool bit without interference with the tool or head mount. We will show how to efficiently enforce the constraint during level set–based topology optimization modifying the advection velocity such that at each iteration the topology optimization maintains a descent optimization direction and does not violate any of the manufacturability conditions. This approach models the actual subtractive process by carving away material accessible to the machine at each iteration until a local optimum is achieved.

Related Resources

Publication

2021

Optimal Design of Continuum Robots with Reachability Constraints

While multi-joint continuum robots are highly dexterous and flexible,…

Publication

2009

Mathematical modeling and synthetic biology

Synthetic biology is an engineering discipline that builds on our…

Publication

2021

UVStyle-Net: Unsupervised Few-shot Learning of 3D Style Similarity Measure for B-Reps

Boundary Representations (B-Reps) are the industry standard in 3D…

Publication

2016

Faster Command Selection on Touchscreen Watches

Small touchscreens worn on the wrist are becoming increasingly common,…

Get in touch

Something pique your interest? Get in touch if you’d like to learn more about Autodesk Research, our projects, people, and potential collaboration opportunities.

Contact us