Journal of Manufacturing Processes ( IF 6.2 ) Pub Date : 2020-09-05 , DOI: 10.1016/j.jmapro.2020.08.017 Prashant S. Jadhav , Chinmaya P. Mohanty , Tapano Kumar Hotta , Manoj Gupta
The present work proposes a combined experimental methodology and optimization strategy of the process parameters for the turning of Nimonic C-263 superalloy with a multilayer CVD coating using TiN-MT-TiCN-Al2O3 grade KCM25 inserts. Taguchi’s L-27 orthogonal array is used for the experimental design. The outcomes of machining parameters viz. cutting speed (vc), cutting feed (f), depth of cut (ap), cryogenic temperature (T) and holding time (t) are explored on the machining characteristics like surface roughness (SR), nose wear (NW), flank wear (NW) and cutting force (F). The results are further compared with the cryogenic environmental studies that have improved the tool life and led to better machinability of the alloy. The multiple responses of the cryogenic machining environment are converted into the equivalent closeness factor (CF) using the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) method. The TOPSIS based results are further improved using a neuro-genetic algorithm (combined ANN-GA). A confirmatory test is further carried out on the optimum machining parameters obtained by the hybrid approach (the combination of TOPSIS and ANN-GA) to validate the proposed work. It is seen that the closeness factor is improved by 6.17 %. The proposed model can be useful to select the ideal process conditions and to enhance the productivity of turning processes.
中文翻译:
在低温辅助车削过程中改善Nimonic C-263高温合金可切削性的最佳方法
本工作提出了使用TiN-MT-TiCN-Al 2 O 3级KCM25刀片对带有多层CVD涂层的C-263高温合金进行车削的综合实验方法和工艺参数的优化策略。Taguchi的L-27正交阵列用于实验设计。加工参数的结果即。切削速度(v c),切削进给量(f),切削深度(a p),研究了低温(T)和保持时间(t)的加工特性,例如表面粗糙度(SR),机头磨损(NW),后刀面磨损(NW)和切削力(F)。将该结果与低温环境研究进行了进一步比较,该研究改善了工具的寿命并导致合金具有更好的切削性。低温加工环境的多重响应使用“与理想解决方案相似的顺序偏好技术”(TOPSIS)方法转换为等效紧密度因子(CF)。使用神经遗传算法(组合ANN-GA)可进一步改善基于TOPSIS的结果。对通过混合方法(TOPSIS和ANN-GA的组合)获得的最佳加工参数进一步进行了验证性测试,以验证所提出的工作。可以看出,紧密度系数提高了6.17%。所提出的模型对于选择理想的工艺条件并提高车削工艺的生产率可能是有用的。