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  • Küçük Resim
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    Effect of cutting strategy on machining of thin walled polymer
    (UTIS Organizing Committee, 2017-11-02) Keklik, Burak Taha; Kuzu, Ali Taner; Başçı, Ümit Gencay; Karagüzel, Umut; Kayıhan, Mete; Bakkal, Mustafa
    This paper presents the effect of tool path on machining of thin walled thermoplastic polymer, ABS. The effects of cutting speed, feed rate and tool path are studied to evaluate surface quality on thin walled parts. Four different cutting pattern (“zig”, “zig-zag”, “follow periphery” and “trochoidal”) with uncoated WC tool were investigated in the cutting tests. The quality of grooves was examined by their surface roughness, dimensional accuracy and burr structure. Experiments show that the down-milling and “follow periphery” creates dimensionally more accurate grooves. Average 4 μm surface roughness and discontinuous chip formation is obtained in up-milling process. According to the study, the better surface quality and dimensional accuracy can be achieved by down milling in “zig-zag” pattern in terms of surface roughness.
  • Küçük Resim
    Yayın
    Experimental analysis and optimization of cutting strategies and parameters of thin-walled ABS thermoplastics
    (Taylor and Francis Ltd., 2026-04-15) Keklik, Burak Taha; Kayıhan, Mete; Kuzu, Ali Taner; Bakkal, Mustafa
    This study investigates the influence of tool path and milling parameters on the surface quality and dimensional accuracy of thin-walled structured thermoplastic polymer acrylonitrile butadiene styrene (ABS). Tests examined the effects of up-milling and down-milling on channels of two depths (10 and 20 mm) using three tool path strategies (zig-single direction, zigzag-double direction and follow periphery-peripheral cutting), five cutting speeds (25 to 125 m/min) and three feed rates (0.05, 0.1 and 0.2 mm/rev). The milling operation was carried out with an uncoated tungsten carbide end mill. Performance was evaluated through cutting forces (full and half immersion), surface roughness (base and side walls) and dimensional accuracy (channel width and 1 mm thin-wall deviations). A multi-objective optimization based on the chip removal rate (CRR), width deviation, wall deviations (left and right) and corresponding surface roughness values was conducted in order to determine the optimum cutting parameters. The results demonstrate that the Zig-Zag tool path combined with a cutting speed of 125 m/min yielded the optimal performance. Moreover, the optimization analysis revealed that the ideal feed rates for these conditions fall within the range of 0.05–0.09 mm/rev.