Lựa chọn bộ thông số hình học hợp lý của mảnh dao hợp kim cứng chế tạo tại Việt nam theo chỉ tiêu nhám bề mặt và độ chính xác kích thước khi tiện công tua thép không gỉ SUS304

k nh m i dao r, g c sau v cu i c ng l g c nâng . Qua phân tích, th o lu n c h nh d ng h nh h c m nh dao h p kim c ng ph nh m b m t v chính xác k c (-5o), g c sau (12o), b n k nh m i dao r (0,4mm), g c nâng -6o), g c nghiêng ch nh 93o), g c m i dao 35o). T kh a: Th p không g nh m b m t (Ra), T s S/N, Phân t Abstract This paper presents an experimental study for selecting the appropriate geometrical parameters such as of carbide insert, which is made in Viet nam, to ensure best surface roughness and dimensional accuracy contour turning SUS304 stainless steel with convex curved profile on the CNC lathe. Method of experimental design and analysis of variance shuch as Taguchi and ANOVA were used to assess the influence level of the geometric parameters of cutting tools on the two targets. The study results shows that for the surface roughness and the dimensional accuracy, assessed by the deviation of the machining diameter compared with the design diame he the greatest influence level, Followed by, the contribution percentages for the nose radius r, the finds out the optimized parameters to achieve the best surface roughness and dimensional accuracy simultanously -5o o), the nose radius r (0.4 mm),the -6o o), the nos o). Keywords: Stainless steel, Surface roughness (Ra), Signal to Noise (S/N), Analysis of variance (ANOVA). * * Tel: (+84) 904180428 Email: tuyen.buingoc@hust.edu.vn 037-043 o o o o o o 2.1. V t li u, d ng c , thi t b th nghi m V t li u: b min (MPa) c min (MPa) min (%) min (%) (HVmax) 037-043 , (%) max max max , (%) d (g/cm3) u (MPa) (HRA) M u th nghi m: D ng c c t: . Thi t b : M nh m: a y max a 2.2 Nghiên c u, l a ch n c c thông s h nh h c m nh dao h p kim c ng ( tr ng th i t nh). -0,05 o o o o o 037-043 o o o o 2.3. Thi t k th nghi m Taguchi 2 0 1 n j j MSD x x n j 0 i e T A B C A A T B B T C C T e e T o 037-043 TT B ng tr c giao RaTB S/NRa (mm)r 1 0 10 0.2 -6 1.385 -2.8290 0.0510 25.8486 2 0 10 0.2 -6 1.367 -2.7154 0.0505 25.9342 3 0 10 0.2 -6 1.371 -2.7407 0.0513 25.7977 4 0 12 0.4 0 1.227 -1.7769 0.0341 29.3449 5 0 12 0.4 0 1.203 -1.6053 0.0327 29.7090 6 0 12 0.4 0 1.231 -1.8052 0.0312 30.1169 7 0 14 0.6 6 1.113 -0.9299 0.0437 27.1904 8 0 14 0.6 6 1.112 -0.9221 0.0432 27.2903 9 0 14 0.6 6 1.117 -0.9611 0.0414 27.6600 10 -5 10 0.4 6 1.019 -0.1635 0.0350 29.1186 11 -5 10 0.4 6 1.013 -0.1122 0.0311 30.1448 12 -5 10 0.4 6 1.012 -0.1036 0.0330 29.6297 13 -5 12 0.6 -6 0.933 0.6024 0.0213 33.4324 14 -5 12 0.6 -6 0.862 1.2899 0.0242 32.3237 15 -5 12 0.6 -6 0.901 0.9055 0.0211 33.5144 16 -5 14 0.2 0 1.127 -1.0385 0.0411 27.7232 17 -5 14 0.2 0 1.122 -0.9999 0.0392 28.1343 18 -5 14 0.2 0 1.112 -0.9221 0.0363 28.8019 19 -10 10 0.6 0 1.397 -2.9039 0.0513 25.7977 20 -10 10 0.6 0 1.391 -2.8665 0.0524 25.6134 21 -10 10 0.6 0 1.397 -2.9039 0.0532 25.4818 22 -10 12 0.2 6 1.313 -2.3653 0.0573 24.8369 23 -10 12 0.2 6 1.282 -2.1578 0.0533 25.4655 24 -10 12 0.2 6 1.243 -1.8894 0.0521 25.6632 25 -10 14 0.4 -6 1.112 -0.9221 0.0432 27.2903 26 -10 14 0.4 -6 1.113 -0.9299 0.0423 27.4732 27 -10 14 0.4 -6 1.125 -1.0231 0.0441 27.1112 T ng -34.789 756.448 a 037-043 a a a mm. 2 3 2 1 2 2 2 1 2 2 1 2 o 3 o o 2 o 2 o 2 o 2 1 o mm) -0,05 (mm) (o) (o) (o) (o) (o) 037-043 2 o 2 o 2 1 o [1] . [2] GS.TSKH B nh Ti n Long, PGS. TS B i Ng c Tuyên (2013), L thuy t t o h nh b m t v ng d ng trong k thu , NXB GDVN, H N i. [3] [4] Nguy c L c T n, Tr n Xuân Vi t (2007), S tay công ngh ch t o m y, NXB KHKT, H N i. [5] Nguy n Th n Th L c, Lê Thanh ng d n thi t k d ng c c t kim lo i, NXB GDVN. [6] Nguy n Vi t Ti p (1997), Nghiên c u t nh gia công c a v t li u ch t o m y v ng d i h c B ch khoa H N i. [7] ng (1997), V t li u h c, NXB KHKT, H N i. [8] Ya. L. GUREVITS, M. V. GOROKHOV, V. L. ZAKHAROV, N. L. ZEMINA (H ng Nguyên biên d ch) (1981), S ch tra c u ch c t c c v t li u kh gia công, NXB KHKT, H N i. [9] . . , . . go (2006), , MOCKBA MA HOCTPOEH E. [10] Sandvik Coromant (2010), Technical guide Metal cutting tochnology. [11] David A. Stephenson,John S. Agapiou, Metal Cutting Theory and Practice, Taylor & Francis Group, 2006. [12] ng (2007), Nghiên c nh ch c t t t tr ngoài trên máy ti n CNC, Lu n n ti n s - N i. [13] a quá trình c t g t khi ti ng ch y dao l n, Lu n n ti n s - N i. [14] Nguy n Th Qu c Dung (2012), Nghiên c u qu tr nh ti n th p h p kim qua tôi b ng dao PCBN, Lu n n ti n s - N i. [15] Nguy n Ng c Kiên (2013), ng d p tr tu nhân t o v phân t x nh ch c t t y phay CNC, Lu n n ti n s - N i. [16] M. Kaladhar *, K. Venkata Subbaiah, Ch. Srinivasa Rao (2012), Determination of Optimum Process Parameters during turning of AISI 304 Austenitic Stainless Steels using Taguchi method and ANOVA, International Journal of Lean Thinking Volume 3, Issue 1 (June 2012). [17] Rahul davis1, Vivek john2, Vivek kumar lomga3 & Raja paul horo4 optimization method in wet turning operation of en 19 steel, International Journal of Mechanical and Production Engineering Research and Development (IJMPERD) ISSN 2249-6890, 3(2), (2013), 193-198. [18] L. B. Abhang* and M. Hameedullah (2010), Power Prediction Model for Turning EN-31 Steel Using Response Surface Methodology, Journal of Engineering Science and Technology Review 3 (1) (2010) 116-122. [19] method for determining optimum surface roughness in turning of medical stainess steel. International scientific conference, 21 22 november 2014, Gabrovo. [20] Lungu, N; Croitoru, S. M; BoRaan, M (2013), Optimization of cutting tool geometrical parameters using taguchi method, Academic journal of manufacturing engineering, vol. 11, issue 4/2013. [21] T. Tamizharasan, N. Senthilkumar (2014), Numerical simulation of effects of machining parameters and tool geometry using DEFORM-3D: Optimization and experimental validation,World Journal of Modelling and Simulation, ISSN 1 746-7233, England, UK, Vol. 10 (2014) No. 1, pp. 49-59. [22] Genechi Taguchi (1990), A primer on the taguchi method - Joyce cary, TS156.R69 (1990) 89-14736 [23] Nguy , Nguy nh (2011), Quy ho ch th c nghi m trong k thu t, NXB KHKT, H N i. [24] Nguy n Do n (2009), X l s li u th c nghi m trong k thu t, NXB KHKT, H N i.