Effect of Different Geometric Texture Shapes on Wettability and Machining Performance Evaluation Under Dry and MQL Environments
The present study deals with application of tool and lubricant-based strategies for titanium machining. Laser surface texturing is used to generate patterns of different shapes over the rake face of tungsten carbide cutting tools. Contact angle (CA) at the plain and textured tools is measured with DI water, oil, and MQL fluid in 1:10 oil-to-water ratio. The contact angle values for textured surfaces increase compared to plain surface, and cutting fluid droplets do not spread over the textured surfaces. Further machining experiments are conducted at constant cutting conditions, and maximum 10% reduction in cutting force is obtained for chevron-shaped textures. The textured surfaces under MQL environment offer the combined action of convective heat transfer and fluid retention and release upon requirement. This helps in reducing cutting force, thrust force, and abrasive wear zone over the secondary zone owing to improved lubrication mechanism due to textures.
KeywordsTextured tools MQL Wettability Contact angle Cutting forces Ti6al4v machining
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