Roll profile curve design method for dual-frame four-roll leveling unit
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A curved design, double-stand technology, applied in the direction of rolls, metal processing equipment, metal rolling, etc., can solve the problems of color difference, large roll consumption, etc.
Active Publication Date: 2014-01-01
SHANGHAI MEISHAN IRON & STEEL CO LTD
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[0004] This invention provides a roll profile curve of a double-frame four-roll skin pass unit for the defects of strip steel shape, excessive roll consumption, and color difference in the prior art design method
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Embodiment 1
[0099] Embodiment 1: see image 3 , 4 ,
[0100] First, in step 1, collect the equipment characteristic parameters of the double-frame skin pass unit, mainly including: the first frame, the second frame working roll and support roll diameter D 1w =D 2w =500mm, D 1b =D 2b =1100mm, length L of working roll and backup roll w1 = L w2 = L b1 = L b2 =1250mm, working roll bending cylinder distance l 1 =l 2 =2300mm, press the screw central moment L 1 = L 2 =2300mm, maximum positive bending force S + 1max =S + 2max =1134kN, maximum negative bending force S - 1max =S - 2max =-1134kN, the maximum amount of positive inclination roll , the maximum amount of negative tilt roll , the maximum rolling force , maximum rolling speed , Work roll surface actual hardness K w =1200, the actual hardness of the support roller surface K b =1200;
[0101] Subsequently, in step 2, collect the typical specification product parameters of each variety specification range of str...
Embodiment 2
[0133] Example 2 : see Figure 5 — Figure 8 .
[0134] First, in step 1, collect the equipment characteristic parameters of the double-frame skin pass unit, mainly including: the first frame, the second frame working roll and support roll diameter D 1w =D 2w =450mm, D 1b =D 2b =1100mm, length L of working roll and backup roll w1 = L w2 = L b1 = L b2 =1450mm, working roll bending cylinder distance l 1 =l 2 =2400mm, press the screw central moment L 1 = L 2 =2400mm, maximum positive bending force S + 1max =S + 2max =800kN, maximum negative bending force S - 1max =S - 2max =-800kN, the maximum amount of forward tilting roll , the maximum amount of negative tilt roll , the maximum rolling force , maximum rolling speed , Work roll surface actual hardness K w =1100, the actual hardness of the support roller surface K b =1200;
[0135] Subsequently, in step 2, collect the typical specification product parameters of each variety specification range of s...
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Abstract
The invention relates to a roll profile curve design method for a dual-frame four-roll leveling unit. The method is characterized by comprising the following steps: (a) collecting equipment characteristic parameters of the dual-frame leveling unit; (b) collecting incoming material parameters of typical specification products in various specification ranges of strip steel; (c) setting the roll bending force and roll inclination of a first frame and a second frame in basic states; (d) setting roll profile curves of a working roll and a support roll by using roll profile curve parameters and an optimization variable; (e) optimally calculating roll profile curve parameters; (f) substituting an optimal roll profile curve parameter to obtain an optimal roll profile curve equation of the working roll and the support roll. According to the technical scheme, aberration is controlled under the consideration of a strip shape and the roll consumption, the obtained roll profile curves of the working roll and the support roll are optimized, the rolling pressure and pressure between the rolls can be distributed uniformly to the maximum extent, the probability of aberration is reduced; meanwhile, the requirements of strip shape and roll consumption are met, and greater economic benefit is brought to enterprises.
Description
technical field [0001] The invention relates to the field of roll profile curve design, in particular to a roll profile curve design method of a skin pass unit, in particular to a roll profile curve design method of a two-stand four-roll skin pass line. Background technique [0002] In the temper rolling process, the contact width between the strip and the work roll is generally smaller than the length of the work roll body. Under the action of rolling force, the contact area between the work roll and the back-up roll outside the width of the strip is a harmful contact. part, it causes additional deformation of the work roll, causing a large deflection of the work roll, which in turn causes uneven distribution of rolling pressure and inter-roll pressure, (such as figure 1 Shown) Finally, there will be defects such as strip shape, excessive roll consumption, and color difference. For this technical problem, the commonly used solution is to optimize the design of the roll sha...
Claims
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