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Experimental investigation of surface quality in ultrasonic machining of WC-Co composites through Taguchi method

1 Department of Mechanical Engineering, National Institute of Technology, Kurukshetra, Haryana, India
2 Department of Mechanical Engineering, NITTTR, Chandigarh, India

Topical Section: Advanced composites

In manufacturing industries, the demand of WC-Co composite is flourishing because of the distinctive characteristics it offers such as: toughness (with hardness), good dimensional stability, higher mechanical strength etc. However, the difficulties in its machining restrict the application and competitiveness of this material. The current article has been targeted at evaluation of the effect of process conditions (varying power rating, cobalt content, tool material, part thickness, tool geometry, and size of abrasive particle) on surface roughness in ultrasonic drilling of WC-Co composite. Results showed that abrasive grit size is most influential factor. From the microstructure analysis, the mode of material deformation has been observed and the parameters, i.e. work material properties, grit size, and power rating was revealed as the most crucial for the deformation mode.
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