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3D Printing the future of e-mobility tools
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3D Printing the future of e-mobility tools

By October 24, 2019 6:36 pm IST

Kennametal has developed a 3D printed stator bore tool specifically designed to meet growing customer demand for lighter weight tooling solutions used to machine components for hybrid and electric vehicles.

E-mobility components are typically machined on smaller, low horsepower CNC machining centers that require lighter weight tooling solutions. Kennametal’s 3D printed stator bore tool weighs half that of the conventionally manufactured version, while still meeting accuracy, roundness, and surface finish requirements for aluminum motor body boring.“The main bore, that houses the stator of an electric motor measures approximately 250 mm in diameter (9.84″) and approximately 400 mm (15.74″) in length, with a smaller bearing bore at the bottom,” said Harald Bruetting, Manager, Program Engineering. “When manufactured using conventional means, a reamer for this type of application would weigh more than 25 kilograms (55 lb.), far too heavy for the existing machine tool or for an operator working with the tool.”

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Werner Penkert, Manager, Future Solutions. “It is an excellent example of how Kennametal is using advanced manufacturing technology to help meet our customer’s unique challenges.”

Two versions of the tool were built, one with a carbon-fiber tube, the other using a 3D-printed metal tube. The results were impressive. The tool with the 3D printed tube weighed in at 10.7 kg (23.6 lb.) and the carbon fiber version at 9.5 kg (20.9 lb.), less than half of their conventional counterparts.

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