Production of
large diameter spiral tubes during production has many influencing factors. In production practice, steel pipes are often degraded by drying and the wrong side. Therefore, it is necessary to analyze the causes and preventive measures of the wrong side of the large diameter spiral pipe. Many manufacturers produce large diameter spiral tubes. Although they can be produced, there are quality differences, so each manufacturer's sales are different and are heavily influenced by quality. The quality of large diameter spiral tubes is an important factor in determining their use. If quality is not guaranteed, how many people will continue to use it?
Large diameter spiral tubes have a wide range of applications. It is trusted by many industries and its quality is also a big advantage. Now, the products are worth the quality of the products, the same price will choose the quality. If the price is different, then many people would rather spend more money to choose the product. Product quality is guaranteed. If the calculation is based on the latter, the price will be higher.
At present, the large-diameter spiral tube demagnetization is usually selected as the DC demagnetization coil, and the demagnetization coil is added to the magnetic particle flaw detector in the future, but the customer does not satisfy the demagnetization effect. The problem is that the DC demagnetization field has only a reverse half cycle magnetic field and can only form large diameters. How the spiral steel pipe is demagnetized, how the internal residual magnetism is reversed, and the residual magnetic properties of the external performance are kept within the required range, so the effect is very unstable. It is usually qualified on site. After the transfer and hit, the magnetic field is overrun. The reason is that the large-diameter spiral tube demagnetizes the internal magnetic domain by "magnetic motion" without being in a very unstable state.
The bending of the steel belt is an important factor leading to the wrong side of the steel pipe. In the formation of large-diameter spiral tubes, the drilling of the steel strip will continuously change the forming angle, resulting in a change in the weld, resulting in a cut, a wrong side or even a circle, which seriously affects the quality of the steel pipe, so observe the steel after unwinding the steel coil The bending of the rolls, and by controlling the vertical rolls, the disc shear can cut off some of the holes and continuously control and correct the forming angle in order to reduce the steel belt boring during production.
Due to the poor shape and dimensional accuracy of the uncut steel strip, it is easy to bend the large-diameter spiral steel strip and cause misalignment. When the residual height of the butt weld of the steel strip is large, if it is handled improperly during the overmolding process, it may cause a large misalignment. Poor edge conditions on the strip are another important cause of errors.
