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straightening principle of straightening machine
Edit:Foshan FoYe Machinery & Equipment Co., Ltd.   UpDate:2017-04-26

Straightening principle of Straightening machine & nbsp;

When the steel sheet is rolled, Uneven, extended deviation, cooling and transportation and other reasons, inevitably caused by rolling after the steel plate or ridge. In order to ensure that the finished steel plate in line with product standards, rolling steel plate must be straightened. Rolling in the straightening machine through the staggered straightening roller repeatedly repeated bending, so that the original curvature of the non-uniformity gradually reduced, straightening process principle is through the reversible bending between the roller products will be stretched to determine the tensile The degree of the main standard is called "plastic deformation rate", defined to be stretched to the yield strength above the relative thickness of steel. The purpose of the straightening process is to stretch the steel sheet so that all the fibers reach the same length. In the process of straightening, the middle part of the steel plate is the elastic deformation zone, the plastic deformation zone is on both sides, the thickness of the steel plate is T, the thickness of the elastic deformation zone is Te, the plastic deformation ratio of the hot straightening steel plate is: PR = plastic deformation rate = T-Te) / T = 1- [2.σ0 / (Rplate.TE)] hot straightening process commonly used plastic deformation rate range is 60% to 70%. Straightening machine set to make the third roller plastic deformation rate of the largest, and then evenly reduced, so that the residual stress in the straightening machine exports to a minimum level. 2 straightening machine control ideas and implementation process straightening machine automation part is divided into: primary system (L1) and secondary system (L2). The role of L2 is to calculate the straight set value and send it to L1. L1 to set the value, and the actual value of the straightening issued to the L2, the formation of closed-loop control, optimize the straightening parameters, to achieve better straightening effect. The whole straightening process can be divided into four modes: automatic mode, automatic mode, semi-automatic mode, manual mode.

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