Issue 53

Y. Lu et alii, Frattura ed Integrità Strutturale, 53 (2020) 325-336; DOI: 10.3221/IGF-ESIS.53.25 330 amount. The calculation results are shown in Tab. 3. It can be seen from the table that the wire feed speed has the greatest influence on the CMT welding deformation, the welding speed is second, and the arc correction has the least influence. Factor Level A B C D Wire feed speed (m/min) Welding speed (mm/s) Arc correction (%) Aluminum plate thickness (mm) 1 3.6 0.56 -5 1.0 2 3.9 0.62 0 1.2 3 4.2 0.66 5 1.5 4 4.5 0.70 10 2.0 Table 1: Test level of factor Figure 4: Binocular stereo vision measurement of mark point device Serial number Factor Result A B C D E ΔD Wire feed speed Welding speed Arc correction Aluminum plate thickness Error Deformation (mm) 1 1 1 1 1 1 0.52 2 1 2 2 2 2 0.64 3 1 3 3 3 3 0.48 4 1 4 4 4 4 0.50 5 2 1 2 3 4 0.36 6 2 2 1 4 3 0.40 7 2 3 4 1 2 0.46 8 2 4 3 2 1 0.34 9 3 1 3 4 2 0.50 10 3 2 4 3 1 0.76 11 3 3 1 2 4 0.68 12 3 4 2 1 3 0.58 13 4 1 4 2 3 0.42 14 4 2 3 1 4 0.64 15 4 3 2 4 1 0.52 16 4 4 1 3 2 0.38 Table 2: Orthogonal test results