Roll-type Straightening Machines Pulling is called cold rolling.After annealing, the sheet often produces a bad shape.For example, when the edge extension of the strip is larger than the middle extension, it will form a wave. In order to meet the requirements of subsequent processing, the...
Pulling is called cold rolling.After annealing, the sheet often produces a bad shape.For example, when the edge extension of the strip is larger than the middle extension, it will form a wave.
In order to meet the requirements of subsequent processing, the factory USES a variety of straightening methods, the more widely used equipment is the multi-roll straightening machine, the sheet through this straightening machine, itself does not produce an extension, but the big waves into small waves, so that the surface of the plate is almost flat.However, for plates with a thickness of less than 0.8mm, it is difficult to straighten them with this method.And the stretching and bending straightener can make the sheet produce longitudinal and transverse deformation at the same time, so as to fully improve the flatness and material properties of the sheet, and greatly improve the sheet straightening technology.In addition, because the bending stress is produced through bending, the tension is greatly reduced. According to experience, when using the stretching bending straightening machine, only 1/3~1/5 of the tension required by pure stretching straightening is needed to achieve the same straightening effect, and its straightening effect is by far the best.Stretching bending straightening is:
1. Good plate shape can be obtained.After stretching and bending straightening, it can completely eliminate the wave edge, wave shape, gourd and slight sickle bending of the board surface, thus greatly improving the flatness of the sheet.
2. It is beneficial to improve the anisotropy of materials.Anisotropy often exists in the yield limits of deep medium thin plates of low carbon steel in longitudinal and transverse directions.So in the sheet for deep punching add hours.Due to the extension of the different parts of the parts of the thickness of the parts will produce uneven, which will make the parts of the skirt lace defects, thus resulting in increased waste rate.After straightening by stretching and bending, the situation will be greatly improved.
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