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60 Cătălin Fetecău et al. Table 1 The plan of the experiments PROCESS PARAMETERS TOOL feed, f, speed, v, depth, t, PARAMETERS mm/rev rev/min mm Clearance angle, α, º 7 0.083 Side rake angle, γ, º -5 0.208 Lead angle, χ, º 45 0.416 Nose radius, r, mm 0.4 0.5 78.54 157.08 314.16 The mechanical properties and chemical composition of work-piece material, AISI 1060, are show in Table 2. Table 2 The chemical composition and mechanical properties of AISI 1060 Chemical composition, % Yield Ultimate Tensile Hardness Material Cu Mn P S strenght, MPa Strenght MPa Bhn AISI 1060 0.605 0.75 0.04 0.05 370 625 179 For meshing were used triangular elements with 3 nodes, both for piece and for the tool. AdvantEdge TM program automatically generates the finite element network after that specified a maximum length of finite element, mean that the smallest and most finite element of edge length [5]. Fig. 4 – The finite element network for the whole piece-tool-chip. The Druker-Prager model was used to simulate the process of chip breaking. 1
Bul. Inst. Polit. Iaşi, t. LVI (LX), f. 2, 2010 61 Fig. 5 – The finite element network for the whole piece-tool-chip with continuous chips of plastic strain for AISI 1060, f=0.208 mm/rev; v=157.08 m/min. Fig. 6 – Von Mises Stress f=0.208 mm/rev; v=157.08 m/min. 3. The results of numerical simulations In according with the plan of experiments, it was made numerical simulation for each cutting regime. For different values of the feed rate and the cutting speed the average values of tangential force Fx in according with AdvantEdge TM are presented in Table 3. Table 3 The average values of tangential force, Fx, N Feed, f, Cutting speed, v, m/min mm/rev 314,16 157,08 78,54 0.083 306.177 308.298 315.186 0.208 544.703 557.041 544.703 0.416 880.12 950.191 1073.24 0.5 1015.5 1135.32 1205.5
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BULETINUL INSTITUTULUI POLITEHNIC D
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Papers presented at THE INTERNATION
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SILVIU BERBINSCHI, VIRGIL TEODOR, N
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CONSTANTIN CHIRIȚĂ, ADRIAN HANGAN
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(6) ⎧ ⎪ ⎨ ⎪ ⎩⎪ FR 1 FR
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Rate of recycling, [%] Bul. Inst. P
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Stachie Marius 221 Storm Kjærside
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