How to Solve Wrinkles in Spinning Products In the spinning process, especially in the thin material spinning process, the spinning process or spinning tools, speed, etc. cannot be well controlled, and the product is prone to wrinkling. Spinning wrinkling can be divided into edge wrinkling during conventional spinning, corner wrinkling during basic forming of deep barrel spinning, middle wrinkling, edge wrinkling during shear spinning, conical wrinkling during shear spinning, and wrinkling caused by low temperature. The work hardening caused by material spinning mainly explains several precautions for edge wrinkling during conventional spinning . 1.Like stretching, the thinner the sheet, the more prone it is to wrinkling, and the trend of wrinkling is inversely proportional to the square of the thickness of the sheet. Therefore, under the premise of completing the same product, thicker materials should be selected first, which also needs to consider cost. 2.Under the condition of a certain material thickness, in order to prevent wrinkling, an appropriate R value for the roller should be used. During spinning, to prevent wrinkling, a spinning ring should be formed at the contact between the roller and the material, which moves along the surface of the material. Keep this spinning ring until the edge of the material, so that the material at the edge will also be relatively stable and not wrinkled. Rollers with lower R values are more likely to form spinning rings, while rollers with higher R values are less likely to form spinning rings, which can easily cause material wrinkling. In fact, this is the same principle as the rounded corner R value of the steel ring. However, if the R angle is selected too small, it will cause the spinning ring to exert too much tension on the material during spinning, which can easily cause the material to crack due to thinning. Therefore, the selection of R angle is very important. Similarly, if the R angle is chosen too large, it will cause the material to become thinner and reduce, resulting in a smoother product surface. However, the material is prone to wrinkling and the product does not fit well with the mold, leading to an increase in product diameter. Increasing the rotational speed can also make it easier to form a spinning ring at the same R angle and feed rate of the roller. 3.Use the pressure between the reverse device or hold plate and the roller to flatten the material that has already been slightly wrinkled. This is also similar to the principle of stretching like edge banding. The reverse device is powered by hydraulic pressure, which can effectively adjust the stroke pressure between the roller and the reverse device. The pressure can be adjusted according to the thickness of the plate and the material, effectively flattening the material during the spinning process. However, for relatively soft aluminum materials, the use of reverse device can cause varying degrees of damage to the inner surface of the material. 4.To ensure that the material edges do not wrinkle, a certain amount of straight edges can be reserved between the roller and the material edges when planning the pass, to ensure the stability of the material edges. 5.To prevent wrinkling, a certain amount and angle of edge folding can also be applied to the circular plate in advance, which can effectively solve this problem.
