Daniel Massimino

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Hello! I’m Daniel, a PhD student at MIT in Mechanical Engineering. I am currently working in the Fabrication Integrated Design Lab (FIDL). I am investigating using glass additive manufacturing as a building material in partnership with Evenline Inc.

I am broadly interested in the development of new construction materials. This interest stems from the combination of my BS in Civil Engineering from Columbia University, five years as a Boeing manufacturing engineer at NASA’s Michoud Assembly Facility, and my current studies as a mechanical engineer.

Rotary table bearing constraint redesign

2024 • Class Project

As part of Professor Alex Slocum’s 2.70 class (FUNdaMENTALS of Machine Design), I investigated a stiffness issue in Evenline’s Glass 3D Printer III (G3DP3). The column affixed to the build plate had experienced significant degradation in stiffness, primarily due to a failure in the rotary stage. As part of the work, I disassembled the stage and identified the culprit: the outer races of the bearings were constrained by screws. I designed a new constraint, machined the existing rotary table platen, shimmed all components, and reassembled the system.

Redesigned bearing constraint shown with 8-bolt hole pattern.

Assembled rotary stage after installing new rotary bearing constraints.

The culprit of the problems! These screws were directly pressing on the outer races of the bearings and were bent over time.

Milling a slot into the existing rotary table top to add clearance for the new constraint.

FEA of the new rotary bearing constraint system. Checking to see if there will be any local failure with the high torques on the center shaft.

Contributions:
Design, microscopy, Structural FEA, machining, overall analysis

Advisors:
Kaitlyn Becker, Alex Slocum

Final presentation: link
Final report: link

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