What is the difference between the lateral thickness of the stainless steel sheet and the plate shape

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During the rolling process of the stainless steel tank, the roll type (roll gap) will also change due to various reasons (such as the bending of the roll and the uneven temperature distribution along the length of the roll), resulting in a change in the thickness difference , Or because the plate in the roll roll side and the middle of the uneven deformation of the waves.
The thickness deviation of the strip in the width direction (ie, the difference between the thickness of the strip and the thickness of the strip) is called the transverse thickness difference (or the difference of the same plate or three points). It determines the shape of the cross section of the sheet .
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Rectangular cross-section of the transverse thickness difference is zero, is the ideal situation. The transverse thickness difference of the wedge-shaped cross section is caused by improper adjustment of the left and right reduction devices. The transverse thickness difference of the symmetrical convex or concave cross section is caused by the actual roll gap shape during rolling, which depends on the design and adjustment of the roll type and the factors such as the blank. In the product standard, the lateral thickness difference is done.
Reducing the lateral thickness difference of the strip is first to help ensure the uniformity of the thickness of the product, and also to increase the finished product rate, especially when delivered in strip length, which can bring some economic benefits.
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The shape of the stainless steel tank is the abbreviation of the flatness of the strip. Plate shape is good or bad refers to the plate, strip the horizontal parts of whether the waves or wrinkles, it depends on the strip along the width of the extension is equal. As shown in Fig. 2, if the roll gap is not good at the time of rolling, the extension of both sides is greater than the middle, resulting in symmetrical bilateral waves; conversely, if the central extension is greater than the edge extension, an intermediate wave (bucket) is produced. If both sides of the pressure properly, so that one side of the extension is greater than the other side, then produce a single wave or sickle bend.
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