Vol. A (9 3 Slip resistance and fatigue strength of friction type of high strength bolted connections with laser cutting holes Eiji Iwasaki, Tatsuya Yamano, Takeshi Mori ( 94-2188 163-1 ( 649-111 137-1 ( 184-884 3-7-2 Advantages of laser cutting over drill are the lack of physical contact and the reduction of operations in manufacture. However, loss of material at end-point of cutting line and heataffected zone are happened. In order to evaluation the slip resistance and fatigue strength of friction type of high strength bolted connections with laser cutting holes, slip and fatigue tests are performed. The test results indicate that the slip resistance and fatigue strength of friction type high strength bolted connection with laser cutting holes are the same as that with drilling holes. Key Words : laser cutting hole, friction type of high strength bolted connection, slip resistance, fatigue strength :,,, 1. 3 17.3.1 16mm 2 1-992-
1 ( φ24.mm 1 (mm L12-12 SMB L19-19 SMB 3 L- SMB L12-49 12 SM49YB B L19-49 19 SM49YB L-49 SM49YB 1 L12-7 12 SM7TMC L19-7 19 SM7TMC L-7 SM7TMC D19-19 SMB D19-49 19 SM49YB D19-7 19 SM7TMC 2. 1(a 1(b 4 SN SM 6 7 8 2(a (b 2.1-993-
(a ( (b ( 1 (a (b 2 ( 19mm 1 3 3 19mm 3 2kW 6kW 6kW 28mm 2 1 1mm 38mm M22 φ24.mm 1 3 2 ( 1mm 1 1mm 3 2 3 6kW CO 2 (LMXIII3-TF6B: TANAKA 2.2 17.3.1 +.mm 1 2% +1.mm 1 1-994-
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2.3 7 8 Hv SMB SM49YB SM7TMC 3Hv 9 SM7TMC 3Hv SMB SM49YB 6 (R a (W CM 3Hv.mm mm SM49YB 1mm 3Hv 1mm 1mm (a A B 3. (b 3 6 Ra 2 SMB W CM SM49YB SM7TMC F1T M22 9.4.9 2(a.6 1 1 (SIS Sa2. ( 9 1 2 2 1mm 1.1 1mm 12 18.1mm 2mm 1mm.mm 1mm -996-
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2 ( 3 (β L SMB.913 L49 SM49YB.876 L7 SM7TMC.879 D SMB.913 D49 SM49YB.876 D7 SM7TMC.879 (a L(D 3 L-1 468.4 444.4.71.42 L-2 46.6 444.4.62.42.4 L-3 477.8 382.7.83.467 D-1 432.2 464..27.66 D-2 426.8 438.6.2.3.39 D-3 4.8 437.6..34 L49-1 476.3 484.1.81.9 L49-2 47.7 3.7.8.614.87 L49-3.7 48.8.617.6 D49-1 429.2 396.9.23.484 D49-2 444.9 461.1.43.62.47 D49-3 486.6 47.4.93.74 L7-1 731.6 7.2.9.9 L7-2 7.2 77..9.616.88 L7-3 683.1 716.9..83 D7-1 699.2 67.1.68.34 D7-2 732.6 689.9.96.61.62 D7-3 66.1 711..33.78 (b L49(D49 (c L7(D7 9 3 3 4. kn 2kN 1 SM7TMC 7.2kN SM49YB kn φ24.mm 11 1.3mm 731.6kN 1 3 6, 9 SM7TMC ±kn.2% kn 8,, 14N/mm 2 8, N/mm 2 1Hz 14N/mm 2 7Hz 2-998-
8 7.2kN 731.6kN 8 731.6kN 7.2kN 6 2 4 6 8 (a 6! 6 8 µ (b 1 (L7-1 σ 14 8 "!$#&% '(*+-,/.1 2.1 3.1 4.1 1 1 6 13 11 4 3 2 1! " 1 6 1 1 4 L9--1 L9--2 L6--1 L6--2 L3--1 L3--2 L--1 L--2 D--1 D--2 "! 2 4 6 8 14 N/mm 2 12 1/2 3, 9 2mm (9 6 12.2mm 2.mm 2mm 7mm 13 14-999-
4 ( (N/mm 2 ( (N/mm 2 (mm ( LI--1 737,711 L6-14-1 6 14.73.16 96,76 LI--2 17,16* L6-14-2 6 14 1..37 62,47 LI--1 3,8,138 L6--1 6.6.114 36,43 LI--2 9,149,9 L6--2 6 1.4.341 217,991 LR--1 628,7 L6-8-1 6 8 1.8.46 442,87 LR--2 84,67 L6-8-2 6 8..147 4,231,286 LR--1 1,, L9-14-1 9 14.3.167 7,84 LR--2 9,611,438 L9-14-2 9 14.3. 67,129 LI9--1 9 139,361 L9--1 9 1.93.371 137,896 LI9--2 9 9,7* L9--2 9 1.6.427 129,84 LI9--1 9 36,384 L9-8-1 9 8.9.3 267,89 LI9--2 9 ( L9-8-2 9 8.22.63 727,348 4 3 2 1 687:9:;=<?>:9:;=< 687:9:;=<?9:9:;=< 687:9:;=@?9:;BA 687:9:;=<?>:9:;BA 687:9:;=<?9:9:;BA 687:9:;=@?9:;=< "! #%$'&(*,+-%."/132 4 2 4 6 8 1 6 LR9--1 9 144,6* LR9--2 9 11,66* LR9--3 9 16,666* LR9--4 9 11,892* LR9--1 9 483,3 LR9--2 9 4,73 D--1 D--2 D--1 D--2 476,679 61,2 1,933,917 2,6, *. N/mm 2 14 SM49YB 3 6 16 3 9 9 ±kn 4 6 9 1kN( 6.7N/mm 2 (= / N/mm 2 N/mm 2 Hz 8Hz 1 6 6 N/mm 2 9 2 ( 2 --
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(8 9 18, C-1, Vol.2, pp.97-98, 2. 6,, :, 6, I-18, pp.367-368,.9. 1, : 7, :,, 6,, 41 /I-12, pp.34-3, 1989.1. I-184, pp.36-366,.9. 2 : 8, :, JSSC, No.2,, 33 1987.1., I-, (CD-ROM, 6.3. 3 :, 2.3. 9, :,,.2. 4, :, 1 : 46, I-18, pp.48-49, 1991.9. (, 1,,,, :, 6.12., -4-