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Purpose: In this study, it is aimed to solve the problems which are work hardening, BUE, high cutting forces, low surface quality, and high tool wear, etc. encountered in machining owing to such properties of AISI 316L austenitic stainless steel such as high mechanical strength, ductility, and low thermal conductivity, using wave form end mills with variable rake and helix angle. Theory and Methods: First of all, cutting forces and surface roughness values were obtained with independent factor which are different processing parameters and different cutting tools. Secondly, these experimental findings were compared with variance and regression analyzes. Then, the optimum processing parameters for tool wear experiments were determined. Finally, the wear performance of the cutting tools was evaluated. Results: It is observed that higher cutting forces and lower surface quality compared to standard tools in wave form tools. The reason behind that could be the higher effects of disadvantages of the negative rake angle regions over the advantages of positive rake angle regions. In terms of tool wears, 6-550 (-4°, +12°) and 4-450 (-6°, +22°) tools with large positive and negative rake angles were shown higher tool wear behavior compared to the standard tool. However, 8-250 (-2°, +4°) and 8-650 (-3°, +4°) tools with smaller positive and negative rake angles were exhibited better wear behavior compared to the standard tool. Conclusion: As a result, in terms of the solution of high tool wear problem of AISI 316L stainless steel; it has been understood that it is suitable for rough machining especially since the 8-250 tool shows a lower wear rate of 17.2% compared to the standard tool. Also, this case will put the 8-250 tool in an advantages position in terms of cost/performance. Therefore, it has been determined that it is more appropriate to use standard tools in finishing (Table A). © 2021 Gazi Universitesi Muhendislik-Mimarlik. All rights reserved. |
