Bending forming process achieving method of in situ nano enhanced high-toughness steel
A nano-reinforcement and bending forming technology, which is applied in the field of metal forming, can solve the problems affecting the dimensional accuracy and surface quality of structural parts, affecting the assembly process, and plate cracking, so as to improve the forming quality and structural reliability, and improve roll bending forming. effect, the effect of reducing production costs
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Embodiment 1
[0053] A method for realizing the bending forming process of in-situ nano-reinforced high-strength and tough steel of the present invention, the specific process is as follows:
[0054] 1) The plate is a 45mm thick plate, the radius of the upper work roll R1 = 800mm; the radius of the lower work roll R2 = R3 = 500mm; the distance between the centers of R2 and R3 is l = 1600mm, bent into a 1 / 3 arc plate with a radius of 1500mm;
[0055] 2) The number of rolling passes is n=5, the total reduction is 187mm, and the reduction for each pass is the same;
[0056] 3) The coefficient of friction is μ=0.2, and the rotational speed is ω=0.05rad / s;
[0057] 4) The circumferential strain distribution after roll bending is as follows: figure 2 (a), the residual stress distribution after bending is as follows figure 2 (b). figure 2 (a) The strain distribution of the bending section of the sheet metal is uniform and close to a fixed value, indicating that the difference in the radius o...
Embodiment 2
[0059] A method for realizing the bending forming process of in-situ nano-reinforced high-strength and tough steel of the present invention, the specific process is as follows:
[0060] 1) The plate is a 45mm thick plate, the radius of the upper work roll R1 = 800mm; the radius of the lower work roll R2 = R3 = 500mm; the distance between the centers of R2 and R3 is l = 1600mm, bent into a 1 / 3 arc plate with a radius of 1500mm;
[0061] 2) The number of rolling passes n=7, the total reduction is 187mm, and the reduction in each pass is the same;
[0062] 3) The coefficient of friction is μ=0.2, and the rotational speed is ω=0.05rad / s;
[0063] 4) The circumferential strain distribution after bending is as follows: image 3 (a), the residual stress distribution after bending is as follows image 3 (b). image 3 (a) The strain distribution of the bending section of the sheet metal is uniform and close to a fixed value, indicating that the difference in the radius of curvature ...
Embodiment 3
[0065] A method for realizing the bending forming process of in-situ nano-reinforced high-strength and tough steel of the present invention, the specific process is as follows:
[0066] 1) The plate is a 45mm thick plate, the radius of the upper work roll R1 = 800mm; the radius of the lower work roll R2 = R3 = 500mm; the distance between the centers of R2 and R3 is l = 1600mm, bent into a 1 / 3 arc plate with a radius of 1500mm;
[0067] 2) Rolling passes n=5, the total reduction is 187mm, and the reduction in each pass is the same.
[0068] 3) The coefficient of friction is μ=0.15, and the rotational speed is ω=0.05rad / s;
[0069] 4) The circumferential strain distribution after bending is as follows: Figure 4 (a), the residual stress distribution after bending is as follows Figure 4 (b). Figure 4 (a) The strain distribution of the bending section of the sheet metal is uniform and close to a fixed value, indicating that the difference in the radius of curvature is small a...
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