焊接加热及冷却过程中接头静态曲折变形的测量与剖析(国外英文资料).docVIP

焊接加热及冷却过程中接头动态弯曲变形的测量与分析(国外英文资料) The measurement and analysis of the dynamic bending deformation of the joints in the process of welding heating and cooling One, the purpose of the experiment (1) to verify the formation process and influence factors of the longitudinal and lateral deformation of welding, to understand and grasp the measurement method of welding deformation and the use of instrument equipment; (2) to understand the dynamic process of welding longitudinal bending deformation while applying welding on the longitudinal edge of the slab, and further The change rule of instantaneous bending deflection during welding process; The influence of the structural factors and the energy of welding wire on the bending deflection of welding. Experimental and experimental materials (a) dc or ac arc welding machine 1 units (2) strip clamping device (homemade) l (3) the test bench (homemade) 1 set (4) the dial indicator 1 (5) clip-on ammeter 1 (0 ~ 250 a) (6) voltmeter (0 ~ 75 v) 1 only (7) low carbon steel plate (by 500-600 ℃, insulation 4 ~ 6 h) high temperature tempering 400 * 60 * 10 mm 2 pieces 400 x 80 x 10 mm 2 pieces 400 x 100 x 10 mm 2 pieces (eight) electrode of phi 4 mm 30 422 Third, the experimental principle Will strip rigid fixed at one end, and along the upper edge of the apply welding longitudinal weld, are in the process of the whole welding heating and cooling, will produce longitudinal bending strip, and the size of the bending deflection and symbols and will continue to change (figure 1). In the strip length Figure 1 strip bending deformation when applied to the edge of the plate The effect of the bar width h on bending deformation When the L remains the same, the width h of the panel has a significant effect on the variation of the bending deflection f in the welding heating and cooling process (figure 2). Width h increases, the slats of the longitudinal bending moment of inertia J or EJ also increases, thus make the strip in the process of heati