Browsing by Author "Firat, K"

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    Machinability evaluation of multi-directional turning tools
    Pinar, AM; Firat, K
    Multi directional turning tools can perform various operations such as cutting, grooving and profile turning with high performance on their own. Tool change and setting times are reduced considerably with the use of these tools. This study discusses surface roughness and wear behavior for different cutting speeds, chip breaker types and nose radii in the rough turning of AISI 4140 steel with physical vapor deposition coated cemented carbide multi directional turning tool. Experimental results based on Taguchi's L8 orthogonal array are assessed through the analysis of variance, main effects and interaction plots. As a result, optimum roughness and an roughness increase percentage are obtained at 0.803 mu m and 19.92 %, respectively.
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    Optimization of Surface Roughness Performance in The Turning of AISI 4140 Steel With Multi Directional Cutting Tool
    Pinar, AM; Firat, K
    Presented study discusses the turning of AISI 4140 steel with groove cutting tool at the rough machining conditions ( high feed rate and depth of cut). Experiments based on Taguchi's L8 orthogonal array at the different levels of cutting speed, chip breaker type and nose radius conducted. As a result of the analyses carried out at the confidence level of 95%, nose radius has the most significant effect on the roughness followed by chip breaker type and chip breaker type-nose radius interaction, and optimum roughness is obtained as 0,572 mu m. Furthermore, tool wear performances are observed for each experiment condition.