A Shape Control Method for Hot Continuous Rolling with Altered Crown Distribution
A technology of shape control and hot continuous rolling, applied in the direction of profile control, etc., can solve the problems such as the inability to exert the function of the mechanical adjustment mechanism, the shape of the finished hot rolled coil, and the difference in the proportion of the crown of the strip product.
Active Publication Date: 2017-07-18
SHOUGANG CORPORATION +1
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Problems solved by technology
[0003] The present invention provides a method for controlling the profile of the hot continuous rolling strips by changing the crown distribution, which solves or partially solves the problems in the prior art that do not consider that each steel type has its own rolling process characteristics, its own attributes, dimensions, etc., resulting in Strip products with different hardness and different width-to-thickness ratios have great differences in proportional crown distribution, which cannot play the role of upstream and downstream mechanical adjustment mechanisms, and cannot adjust the proportional crown distribution of each stand, resulting in technical problems in the shape of the finished hot-rolled coil
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[0013] see figure 1 , a hot strip shape control method for changing crown distribution provided by an embodiment of the present invention, comprising the following steps:
[0014] Obtain the target convexity and target flatness according to the properties of the incoming steel;
[0015] For the parameters of the last pass, calculate the unloaded roll gap crown, loaded roll gap crown, mechanical adjustment mechanism distribution calculation, strip lateral flow calculation and critical warping calculation;
[0016] When the calculation of the critical warpage does not satisfy the wave shape criterion, the target crown is adjusted, and the parameters of the last pass are calculated for the unloaded roll gap crown, the loaded roll gap crown, and the distribution of the mechanical adjustment mechanism Calculation, strip lateral flow calculation and critical warpage calculation, until the critical warpage calculation meets the wave shape criterion;
[0017] When the calculation re...
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The invention discloses a hot continuous rolling plate shape control method for changing convexity distribution, and belongs to the technical field of hot rolling processes. The hot continuous rolling plate shape control method for changing convexity distribution includes the following steps that the target convexity and target flatness are obtained according to the attribute of the type of incoming material steel; no-load roller seam convexity calculation, loaded roller seam convexity calculation, mechanical regulation mechanism distribution calculation, strip steel transverse flow calculation and critical warping calculation are conducted on parameters of the last pass; and when the critical warping calculation result meets the wave shape criterion, proportional convexity distribution calculation is conducted, and calculation is conducted on upstream passes pass by pass. By means of the hot continuous rolling plate shape control method for changing convexity distribution, the distribution situations of all machine frame proportion convexities can be flexibly regulated for strip steel of different specifications and types according to product requirements and the finish rolling outlet target convexity, the functions of mechanical regulation mechanisms can be reasonably brought into play upstream and downstream, and the rolled strip steel plate shape quality can be ensured.
Description
technical field [0001] The invention relates to the technical field of hot rolling technology, in particular to a hot continuous rolling strip shape control method for changing crown distribution. Background technique [0002] High-precision thin strip shape quality control has always been the goal of hot rolling process control, and shape is an important product process index of hot-rolled thin plate. An important technology of control. At present, most of the plate shape secondary process systems adopt the same proportional crown distribution mode between racks for all steel types, without considering that each steel type has its own rolling process characteristics and its own attributes, dimensions and other requirements, which will lead to different The strip products with different hardness and width-to-thickness ratio have great differences in proportional crown distribution, which makes the proportional crown distribution ratio of F1 / F4 of some steel types reach more...
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IPC IPC(8): B21B37/30
CPCB21B37/30
Inventor 郭薇赵阳王凤琴王秋娜赵强李彬张长利李飞刘子英张喜榜李沛环
Owner SHOUGANG CORPORATION