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2022
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10
Yuanhao Pull Bending: Advantages and Disadvantages of the Pull Bending Machine
Author:
Qingdao Yuanhao
Yuanhao bending manufacturer said that the use of bending machine can effectively eliminate the residual stress inside the material, so that the size of the product is good. Due to the cold of the metal material, the material can improve the overall mechanical properties of the material after bending. At present, there are many ways to pull the bending machine. Do you know the advantages and disadvantages of the bending machine? Let's learn about it!
Advantages and disadvantages of the bending machine:
1. First stretch, then bend, then stretch. The axial forward power is applied to the shape of the contour part so that the stress on the cross section reaches the limit of yield. Then apply the bending moment so that the type of material mode is carried out under the condition of constant front force; this value should make the profile small radius of the inner material on the section. The function of the pre-test force is to eliminate the initial distortion and deformation of the supply state, and prevent the edge of the mid-size abdominal plate from stabilizing and wrinkling the mid-size abdominal edge. Adequate total tensile power ensures a significant reduction in the amount of repulsion and reduces or eliminates residual stresses.
Advantages: the amount of rebound is small, which can eliminate the initial distortion; prevent the stability of the web and wrinkles; the residual stress is small or does not exist.
Disadvantages: the influence of external friction. Application scope: all profiles except corners.
2. Apply axial tension to the shape of the contour part, and then apply a bending moment to the mold under the condition of constant tension. The value of the axial tensile force is suitable for reaching small stresses on the internal cross section of the internal profile.
Advantages: the effect of friction without friction can eliminate the initial distortion; prevents the stability of the abdomen and wrinkles.
Disadvantages: large rebound, presence of residual stress and suitable contour, with large corners.
3. The Yuanhao stretch bending manufacturer stated that a bending moment is applied to the contour to make it moldy; then axial tension is applied. The value of the axial tensile force is applied to the small stress inside the contour to reach the tensile and external limits.
Advantages: smaller amount of rebound, little or no residual pressure present.
Disadvantages: The influence of external friction cannot eliminate the initial distortion; the abdomen may lose and wrinkle.
4. The initial bending method still stretches first, then bends and then stretches. The Yuanhao stretch bending manufacturer said that because basically a contour after bending has been formed, there is still a certain amount of rebound, so the secondary bending and deformation during the secondary bending, and the stress difference between the outer layer and the inner material of the part are very small. Uninstall Uninstall. The amount of bombs subsequently bombed was significantly reduced.
Advantages: If the amount of rebound is not considered, the parts can be better.
Cons: Added pull and round handling process.
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