Case Studies
TPM Improves Marine Component Performance through Concurrent Engineering
The customer originally fabricated this part by forming stainless steel plates welding multiple pieces together. This was a very time-consuming operation to fabricate a single part, and left sharp edges and corners that were cutting the hoses that the part is designed to keep separate. The fabricated parts were also not as consistent as desired creating uneven winding on the hoses. Working with the customer, TPM added rounded edges
and radii to the part, eliminating the sharp edges that were impacting component functionality, reduced component weight, incorporated integral component markings and provided the customer with lot traceability.
To enhance
corrosion resistance, TPM provided the customer with post- cast electro-polishing, which had the added benefit of making the component aesthetically pleasing.
PART: Hose Spreader Size: 6 x 5 x 4 in., 5 lbs. Alloy: CF8
Notes: Casting conversion from fabrication/weldment
Students Collaborate on Investment Cast Bowie Knife Traditionally a forged product, the Bowie Knife project not
only demonstrates the breadth of the techniques being taught at Pittsburg State University, but it also offers students valuable lessons in project management and industry collaboration. The
success of this project demonstrates capabilities
in casting simulation, mold/die design, CNC machining, wax injection, investment casting, heat treatment, additive manufacturing, finishing, and craftsmanship. This knife was completely 3D modeled by the team. During the design phase, a few prototypes were additively manufactured created and then the students conducted casting simulations to produce gate design.
Considering all proper contraction rates, a die was 3D
modelled. A Mastercam program was written to CNC machine the die, which was put to work on the University’s wax injection press. Students collaborated with ICI Member companies Signicast and the American Foundry Group to shell and cast the knives in CA6NM Stainless steel. After cut off, the knives underwent secondary machining operations and heat treatment. The knives were then hand worked to attach a walnut handle, secured with three brass pins. The aluminum bronze pommel was then attached, and the knife was hand polished.
26 ❘ July 2021 ® Pittsburg State University
PART: Bowie Knife Size: 22 x 5” in.
Alloy: CA6NM Martensitic Stainless Steel Notes: Casting Conversion
TPM, Inc.
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