ABOUT THE PLANING CROSS LAMINATED SOLID WOOD

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Analele Universităţii din Oradea, Fascicula Protecţia Mediului Vol. XVII, 2011 ABOUT THE PLANING CROSS LAMINATED SOLID WOOD Galis Ioan *, Lucaci Codruţa, Lustun Liana, Fetea Marius, Derecichei Laura, Cheregi Gabriel ** *University of Oradea, Faculty of Environmental Protection, 26 Gen. Magheru St., 410048, Oradea, Romania **University of Oradea, Faculty of Electrical Engineering and Information Tehnology, 1 University St., 410087, Oradea, Romania Abstract This work paper is about the measurement of cross cutting by milling laminated solid wood witch requires some drilling conditions. The scientific work has treated different aspects of the milling process. This values characterizing the values of the dynamic parameters. The specific cutting work represents a main factor to determining the values of power and cutting forces in milling. Also it characterizes the specific energy consumption for cutting. Key words: Wood Milling, splintering, Cutting Power. INTRODUCTION Milling wood has the highest weight in the whole cutting operation. Further studies and research are extremely numerous. Studies and scientific work have treated different aspects of timber milling and cutting regimes and the construction and milling exploitations. MATERIALS AND METHODS For cutting power measurement using a power meter recorder (FLUKE 1653) mounted in the electrical circuit of the main engine of the milling machine (Figure 1). This wattmeter allows the measurement of cutting power with measurement accuracy of ± 5 %. Each cutting value power represents the arithmetic mean value of five measurements performed on standard pieces in identical milling condition. Fig. 1. Wattmeter recorder (FLUKE 1653) 427

Experiments were performed on a manual milling machine (FELDER PROFIL 40) with main features: Spindle speed n = 3000, 4500, 6000, 9000 rot/min Beating radial spindle mounting area mills br 0, 004 mm Electric motor power 2.8 kw spindle drive Fig. 2. Manual milling machine Fig. 3. Types of Milling We used milling and head milling cutters manufactured and maintained by plant Codlea About ASCO TOOLS SA. The cutters used in experiments with the following characteristics: 240 mm diameter 30 mm bore Blade width b = 10 mm edged carbide teeth with 20 K number of teeth z = 4 angles α = 15, β = 55, γ = 20 sharp and measured at ASCO TOOLS SA 428

radius of rounding of cutting edges ρ 0, 005 mm To be able to study and have used the following: - cross-cutting advances in tooth u z = 0,1 mm; 0,2 mm; 0,4 mm; 0,6 mm; 0,8 mm; 1,0 mm; 1,2 mm; 1,6 mm - h milling and the following heights: 1 mm; 5 mm; 10 mm; 15 mm; 20 mm; 25 mm; 30 mm; 35 mm; 40 mm; 45 mm; 50 mm. RESULTS AND DISCUSSION The first objective was to study experimentally and the dependence of the dynamic parameters of the cutting tool and the milling system of cross-tree wood. Thus the dependence of power consumption and the advance per tooth, depending on the depth of cut for the three types of milling (open, semi, closed) for sharp-edged. Based on the values are determined: Cutting K resistivity; Average cutting force F m ; Average and maximum cutting force per tooth F dm, F dmax ; In table 1 is presented the cutting power P (kw): - milling cross open / semi / closed-fir (F.D.= milling cross open, F.S.D.= milling cross semi, F.I.= milling cross closed-fir) wood with U = 8 10%, - cutter diameter D = 240 mm, - cutter speed n = 4500 rot/min - number of teeth is z = 4, - teeth with sharp-edged of K = 20 (ρ 0.005mm), - milling width b = 10 mm 429

Table 1 The cutting power in milling cross open / closed-fir wood process Milling height Advance per tooth in mm/ tooth, feed rate u in m/min h 0,1 0,2 0,4 0,6 0,8 1,0 1,2 1,6 1,8 3,6 7,2 10,8 14,4 18 21,6 28,8 1 F.D. 0,03 0,03 0,035 0,038 0,04 0,045 0,047 0,057 F.S.D. 0,03 0,03 0,035 0,038 0,04 0,045 0,047 0,057 F.I. 0,03 0,03 0,035 0,038 0,04 0,045 0,047 0,057 5 F.D. 0,07 0,08 0,095 0,11 0,13 0,15 0,16 0,19 F.S.D. 0,07 0,08 0,1 0,11 0,13 0,16 0,17 0,2 F.I. 0,07 0,08 0,1 0,12 0,13 0,17 0,18 0,21 10 F.D. 0,1 0,11 0,14 0,17 0,21 0,25 0,29 0,34 F.S.D. 0,1 0,11 0,14 0,18 0,22 0,25 0,3 0,36 F.I. 0,1 0,11 0,15 0,2 0,24 0,27 0,32 0,38 15 F.D. 0,13 0,13 0,18 0,22 0,27 0,315 0,37 0,43 F.S.D. 0,13 0,14 0,19 0,23 0,28 0,34 0,4 0,47 F.I. 0,13 0,15 0,2 0,24 0,29 0,36 0,43 0,51 20 F.D. 0,14 0,16 0,2 0,25 0,31 0,36 0,43 0,48 F.S.D. 0,14 0,16 0,2 0,26 0,34 0,39 0,45 0,53 F.I. 0,15 0,17 0,24 0,29 0,36 0,42 0,48 0,59 F.D. 0,17 0,19 0,25 0,29 0,36 0,41 0,49 0,54 25 F.S.D. 0,17 0,2 0,27 0,31 0,39 0,45 0,5 0,6 F.I. 0,18 0,21 0,28 0,34 0,42 0,49 0,58 0,66 F.D. 0,19 0,22 0,29 0,35 0,43 0,5 0,58 0,65 30 F.S.D. 0,19 0,23 0,31 0,38 0,47 0,55 0,64 0,72 F.I. 0,2 0,24 0,32 0,43 0,5 0,6 0,68 0,79 F.D. 0,21 0,23 0,32 0,38 0,46 0,54 0,6 0,67 35 F.S.D. 0,21 0,24 0,34 0,41 0,50 0,58 0,67 0,72 F.I. 0,22 0,25 0,34 0,44 0,55 0,63 0,72 0,84 F.D. 0,23 0,24 0,34 0,43 0,53 0,6 0,68 0,77 40 F.S.D. 0,24 0,25 0,36 0,47 0,57 0,66 0,75 0,86 F.I. 0,24 0,26 0,38 0,5 0,62 0,72 0,85 0,96 F.D. 0,25 0,27 0,35 0,44 0,54 0,61 0,68 0,76 45 F.S.D. 0,26 0,28 0,40 0,49 0,60 0,68 0,78 0,87 F.I. 0,27 0,30 0,42 0,54 0,67 0,78 0,92 1,08 F.D. 0,28 0,30 0,39 0,50 0,60 0,68 0,78 0,88 50 F.S.D. 0,29 0,31 0,42 0,54 0,66 0,75 0,85 0,96 F.I. 0,30 0,33 0,45 0,58 0,72 0,83 0,99 1,2 In table 2 is presented the cutting power P (kw): - Milling cross open / closed-fir wood with U = 8 10%, - cutter diameter D = 240 mm, - cutter speed n = 4500 rot/min, - number of teeth z = 4, - teeth with sharp-edged of K = 20 (ρ 0.005mm), - milling width b = 10 mm, - the amount of material milled (milled length) L1 = 1 m, L2 = 200 m, L3 = 400 m, L4 = 600 m - 430

Table 2 The cutting power in milling cross open / closed-fir wood process in the amount of material Milling Advance per tooth in mm, feed rate u in m/min height h 0,1 0,2 0,4 0,8 1,2 Milled length l 1,8 3,6 7,2 14,4 21,6 L1 = 200 0,024/0,024 0,0375/0,037 0,04/0,04 0,05/0,05 0,055/0,055 1 L2 = 400 0,027/0,027 0,04/0,04 0,046/0,046 0,055/0,055 0,06/0,06 L3 = 600 0,029/0,029 0,043/0,043 0,05/0,05 0,06/0,06 0,065/0,065 L1 = 200 0,125/0,125 0,14/0,15 0,17/0,18 0,26/0,26 0,30/0,32 10 L2 = 400 0,135/0,135 0,15/0,16 0,18/0,2 0,29/0,31 0,33/0,35 L3 = 600 0,145/0,145 0,16/0,17 0,2/0,21 0,31/0,34 0,35/0,38 L1 = 200 0,175/0,19 0,2/0,21 0,26/0,29 0,37/0,43 0,54/0,6 20 L2 = 400 0,19/0,21 0,22/0,23 0,29/0,31 0,4/0,47 0,57/0,63 L3 = 600 0,21/0,22 0,23/0,25 0,31/0,33 0,44/0,5 0,61/0,65 L1 = 200 0,24/0,25 0,275/0,3 0,35/0,38 0,51/0,60 0,65/0,78 30 L2 = 400 0,26/0,27 0,3/0,32 0,38/0,42 0,56/0,65 0,70/0,85 L3 = 600 0,28/0,29 0,32/0,34 0,41/0,45 0,6/0,7 0,77/0,91 L1 = 200 0,29/0,3 0,3/0,32 0,41/0,46 0,64/0,74 0,74/0,96 40 L2 = 400 0,31/0,32 0,32/0,35 0,44/0,49 0,69/0,81 0,81/1,05 L3 = 600 0,33/0,35 0,35/0,38 0,48/0,53 0,74/0,87 0,87/1,12 L1 = 200 0,35/0,375 0,35/0,41 0,47/0,54 0,72/0,87 0,87/1,2 50 L2 = 400 0,365/0,4 0,41/0,45 0,51/0,59 0,78/0,94 0,94/1,29 L3 = 600 0,42/0,435 0,43/0,48 0,55/0,63 0,84/1,01 1,01/1,38 The knowing power cut resulting from the above tables we calculate the specific mechanical work cutting formula is denoted by K: Where: h = Milling height b = Milling width K 4 6 10 P = b h u In table 3 is presented the work of cutting specific K, in N*m/cm³ (specific cutting resistance K, in N/mm²): - Milling cross open / semi / closed-fir (F.D.= milling cross open, F.S.D.= milling cross semi, F.I.= milling cross closed-fir) wood with u = 8 10 % - teeth with sharp-edged of K = 20 - cutter diameter D = 240 mm - number of teeth z = 4 - cutter speed n = 4500 rot/min 431

1 5 10 15 20 25 30 35 40 45 50 Milling height The specific cutting resistance in cross open / semi / closed-fir case Advance per tooth in mm/ tooth, feed rate u in m/min 0,2 0,4 0,6 0,8 1,2 Table 3 0,1 1,0 1,6 1,8 3,6 7,2 10,8 14,4 18 21,6 28,8 F.D. 100,00 50,00 29,17 21,11 16,67 15,00 13,06 11,87 F.S.D. 100,00 50,00 29,17 21,11 16,67 15,00 13,06 11,87 F.I. 100,00 50,00 29,17 21,11 16,67 15,00 13,06 11,87 F.D. 46,67 26,67 15,83 12,22 10,83 10,00 8,89 7,90 F.S.D. 46,67 26,67 16,67 12,22 10,83 10,67 10,00 8,3 F.I. 46,67 26,67 16,67 13,33 10,83 10,67 9,44 8,75 F.D. 33,33 18,33 11,67 10,00 9,17 8,00 6,94 7,09 F.S.D. 33,33 18,33 11,67 11,11 9,58 8,33 7,22 7,50 F.I. 33,33 20,00 12,50 11,11 10,00 9,00 8,06 7,91 F.D. 28,89 16,67 10,00 8,15 7,50 6,89 6,48 5,97 F.S.D. 28,89 16,67 10,56 8,52 7,76 7,56 7,04 6,52 F.I. 28,89 15,56 11,11 8,89 8,06 8,00 7,41 7,08 F.D. 23,33 13,33 9,17 6,94 6,46 6,00 5,97 5,00 F.S.D. 23,33 13,33 9,58 7,32 7,08 6,50 6,53 5,52 F.I. 25,00 14,17 10,00 8,06 7,50 7,00 7,08 6,14 F.D. 22,67 12,67 8,33 6,22 6,00 5,47 5,00 4,50 F.S.D. 22,67 13,33 9,00 6,89 6,50 6,00 5,56 5,00 F.I. 24,00 14,00 9,33 7,56 7,00 6,53 6,00 5,50 F.D. 21,11 12,22 8,06 6,48 5,97 5,56 5,00 4,51 F.S.D. 21,11 12,78 8,61 7,04 6,53 6,11 5,46 5,00 F.I. 22,22 13,33 8,89 7,96 6,94 6,67 6,02 5,48 F.D. 20,00 10,95 7,62 6,03 5,48 4,76 4,52 3,99 F.S.D. 20,00 11,43 8,10 6,51 5,95 5,52 4,84 4,28 F.I. 20,95 11,90 8,57 5,58 6,55 6,00 5,16 5,10 F.D. 19,17 10,00 7,08 5,97 5,52 5,00 4,31 4,01 F.S.D. 20,00 10,42 7,50 6,53 5,94 5,50 4,72 4,48 F.I. 20,00 10,83 7,92 6,94 6,46 6,00 5,56 4,98 F.D. 18,52 10,00 7,04 5,43 5,00 4,52 4,01 3,51 F.S.D. 19,26 10,83 7,41 6,05 5,56 5,04 4,51 4,03 F.I. 20,00 11,11 8,33 7,04 6,03 5,56 5,00 5,30 F.D. 18,67 10,00 6,50 5,56 5,00 4,53 4,00 3,66 F.S.D. 19,33 10,33 7,00 6,00 5,50 5,00 4,53 4,00 F.I. 20,00 11,00 7,50 7,00 6,00 5,53 5,50 5,00 In table 4 is presented the work of cutting specific K, in N*m/cm³ (specific cutting resistance K, in N/mm²): - Milling cross open / semi / closed-fir (F.D.= milling cross open, F.S.D.= milling cross semi, F.I.= milling cross closed-fir) wood with u = 8 10 % - teeth with sharp-edged of K = 20 - cutter diameter D = 240 mm - number of teeth z = 4 - cutter speed n = 4500 rot/min - the amount of material milled L1 = 200m, L2 = 400 m, L3 = 600m 432

Table 4 The specific cutting resistance in the amount of material milled case Advance per tooth in mm, feed rate u in m/min Milling height h 0,1 0,2 0,4 0,8 1,2 1,8 3,6 7,2 14,4 21,6 L1 = 200 80-80 62,5-62,5 33,3-33,3 20,8-20,8 15,3-15,3 1 L2 = 400 90-90 66,6-66,6 38,3-38,3 22,9-22,9 16,6-16,6 L3 = 600 96,6-96,6 71,6-71,6 41,6-41,6 25-25 18,1-18,1 L1 = 200 41,6-41,6 23,3-25 14,2-15 10,8-10,8 8,3-8,9 10 L2 = 400 45-45 25-26,6 15-16,6 12,1-12,9 9,2-9,7 L3 = 600 48,3-48,3 26,6-28,3 16,6-17,5 12,9-14,2 9,7-10,5 L1 = 200 29,2-31,6 16,6-17,5 10,8-12,1 7,7-8,9 7,5-8,3 20 L2 = 400 31,6-33,3 18,3-19,2 12,1-12,9 8,3-9,8 7,9-8,8 L3 = 600 35-36,6 19,2-20,8 12,9-13,8 9,2-10,4 8,5-9 L1 = 200 26,6-27,8 15,3-16,6 9,7-10,6 7,1-8,3 6-7,2 30 L2 = 400 28,9-30 16,6-17,8 10,6-11,6 7,8-9 6,5-7,9 L3 = 600 31,3-32,2 17,8-18,9 11,4-12,5 8,3-9,7 7,1-8,4 L1 = 200 24,2-25 12,5-13,3 8,5-9,6 6,7-7,7 5,1-6,6 40 L2 = 400 25,8-26,8 13,3-14,6 9,2-10,2 7,2-8,4 5,6-7,3 L3 = 600 27,5-29,2 14,6-15,8 10-10,4 7,7-9,1 6-7,8 L1 = 200 23,2-25 11,6-13,7 7,8-9 6-7,3 4,8-6,7 50 L2 = 400 24,3-26,6 13,7-15 8,5-9,8 6,5-7,8 5,2-7,2 L3 = 600 26.5-27.5 14,3-16 9,2-10,5 7-8,4 5,6-7,6 50 40 h = 1 mm Fd, Fsd, Fi h = 5 mm Fd h = 5 mm Fsd h = 5 mm Fi h = 10 mm Fd h = 10 mm Fsd 30 20 10 h = 10 mm Fi h = 20 mm Fd h = 20 mm Fsd h = 20 mm Fi h = 50 mm Fd h = 50 mm Fsd h = 50 mm Fi 0 0,1 0,2 0,4 0,6 0,8 1 1,2 1,6 Fig. 4. The graphic of specific cutting advance depending on the tooth 100 90 80 70 60 50 40 30 20 10 0 1 10 20 30 40 50 Uz = 0,1 mm/dinte (Fd) Uz = 0,1 mm/dinte (Fi) Uz = 0,2 mm/dinte (Fd) Uz = 0,2 mm/dinte (Fi) Uz = 0,4 mm/dinte (Fd) Uz = 0,4 mm/dinte (Fi) Uz = 0,8 mm/dinte (Fd) Uz = 0,8 mm/dinte (Fi) Uz = 1,2 mm/dinte (Fd) Uz = 1,2 mm/dinte (Fi) Fig. 5. The graphic of specific cutting depths is depending on the milling length (200 m) 433

100 90 80 70 60 50 40 30 20 10 0 1 10 20 30 40 50 Uz = 0,1 mm/dinte (Fd) Uz = 0,1 mm/dinte (Fi) Uz = 0,2 mm/dinte (Fd) Uz = 0,2 mm/dinte (Fi) Uz = 0,4 mm/dinte (Fd) Uz = 0,4 mm/dinte (Fi) Uz = 0,8 mm/dinte (Fd) Uz = 0,8 mm/dinte (Fi) Uz = 1,2 mm/dinte (Fd) Uz = 1,2 mm/dinte (Fi) Fig. 6. The graphic of specific cutting depths is depending on the milling length (400 m) CONCLUSIONS The specific resistance values of specific cutting work are deducted from cutting power consumption. The specific cutting work values characterizes the cross cutting of the pine wood. This values characterizing the values of the dynamic parameters. The specific cutting work represents a main factor to determining the values of power and cutting forces in milling. Also it characterizes the specific energy consumption for cutting. REFERENCES 1. Cismaru I, 1989, Studiu privind influenţa modului de frezare a sculelor asupra calităţii suprafeţelor la prelucrarea prin frezare revista Industria lemnului nr. 1. 2. Dogaru V, M Câmpean,2004, Wood cutting and Tools, Universitatea Transilvania Braşov, pp 25 31. 3. Dogaru V., 1989, Contribuţii la studiul dinamicii procesului de frezare a lemnului, Universitatea din Braşov, seria BII, vol XXXI. 4. Dogaru V., 1985, Bazele tăierii lemnului şi a materialelor lemnoase, Editura tehnică, Bucureşti 5. Dogaru V., Rusu D, 1986, Frezarea reală a lemnului, Revista Industria lemnului nr. 1 6. Duţu G, Dogaru V., 2007, Frezarea materialelor pe bază de lemn cu scule cu tăişuri diamantate, Editura Universităţii Transilvania Braşov 7. Ispas M.,Ţăran N., 1997, Contribuţii asupra calităţii suprafeţelor opţinute prin frezare revista industra lemnului nr. 3-4 pp.21 25 8. Man V.,Man I, 1987, Superfrezarea lemnului Bucureşti revista industria lemnului nr.1 9. Râmbu I, Florescu I, Dogaru V, Iliescu V., 1980, Tehnologia prelucrării lemnului, tratat vol.i and II, Bucureşti 10. Ţăran N.,1983, Scule şi maşini moderne pentru frezarea lemnului, Editura Tehnică, Bucureşti 434

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