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Machinability of TI/CFRP Stacks in Trimming and Drilling Using Abrasive Waterjet

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Machinability of TI/CFRP Stacks in Trimming and Drilling Using Abrasive Waterjet

 

CFRP and Ti6Al4V are one of the primary candidates as metal-composite stacks in aerospace industry, often joined by riveting process and require precisely machined holes. Conventional machining of composite-metal stacks is a challenging problem. This study investigates the machinability of Ti6Al4V/CFRP stacks using Abrasive waterjet technology for trimming and drilling (piercing) holes. The machining characteristics are studied as a function of process parameters – traverse feed, and water pressure. The machinability is evaluated in terms of macro-features – kerf wall characteristics such as kerf geometry and hole cylindricity. The influence of inhomogeneity seen by the jet was studied, as reflected in the machining characteristics. The machining forces during piercing were recorded characterized and correlated with the process parameters. The nexus between the process parameters, material, kerf quality and piercing forces was established, to determine a processing window in successful machining of Ti6Al4V/CFRP stacks.

 

Author: Rishi Pahuja

 

Conference: SAMPE Seattle 2017

 

SKU/Code: SE17--0819

Pages: 14

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