Patent ID: 11872614
Assignee: BAOSHAN IRON & STEEL CO., LTD.
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 3:
4. The emulsion flow optimization method for suppressing vibration of a cold continuous rolling mill according to claim 3, wherein the step S9 comprises the following steps:
(S9.1) calculating a dynamic viscosity η0i of an emulsion between a roll gap of each of the plurality of rolling stands, wherein η0i=b·exp(−a·Ti), and in the formula, a,b are dynamic viscosity parameters of lubricating oil under an atmospheric pressure;
(S9.2) calculating an oil film thickness ξi between the roll gap of each of the plurality of rolling stands, wherein the calculation formula is as follows:, ξ
   i
  
  =
  
   
    
     
      
       h
       
        0
        ⁢
        i
       
      
      +
      
       h
       
        1
        ⁢
        i
       
      
     
     
      2
      ⁢
      
       h
       
        0
        ⁢
        i
       
      
     
    
    ·
    
     k
     c
    
    ·
    
     
      3
      ⁢
      θ
      ⁢
      
       
        η
        
         0
         ⁢
         i
        
       
       (
       
        
         v
         ri
        
        +
        
         v
         
          0
          ⁢
          i
         
        
       
       )
      
     
     
      
       α
       i
      
      [
      
       1
       -
       
        e
        
         -
         
          θ
          ⁡
          (
          
           K
           ⁢
           
            
             T
             
              0
              ⁢
              i
             
            
            
             
              h
              
               0
               ⁢
               i
              
             
             ·
             B
            
           
          
          )
         
        
       
      
      ]
     
    
   
   -
   
    
     k
     
      r
      ⁢
      g
     
    
    ·
    
     (
     
      1
      +
      
       K
       
        r
        ⁢
        s
       
      
     
     )
    
    ·
    
     Ra
     
      ir
      ⁢
      0
     
    
    ·
    
     e
     
      
       -
       
        B
        L
       
      
      ·
      
       L
       i
      
     
    
   
  
 

in the formula, krg represents a coefficient of the strength of entrainment of lubricant by a longitudinal surface roughness of a work roll and a strip steel and is in a range of 0.09-0.15, Krs represents an impression rate, wherein a ratio of transferring a surface roughness of the working roll to the strip; and
(S9.3) calculating an emulsion flow rate comprehensive optimization objective function,, {
  
   
    
     
      
       F
       ⁡
       (
       X
       )
      
      =
      
       
        
         λ
         n
        
        ⁢
        
         
          ∑
          
           i
           =
           1
          
          n
         
         
          
           
            (
            
             
              ξ
              i
             
             -
             
              ξ
              
               0
               ⁢
               i
              
             
            
            )
           
           2
          
         
        
       
       +
       
        
         (
         
          1
          -
          λ
         
         )
        
        ⁢
        max
        ⁢
        
         
          ❘
          "\[LeftBracketingBar]"
         
         
          
           ξ
           i
          
          -
          
           ξ
           
            0
            ⁢
            i
           
          
         
         
          ❘
          "\[RightBracketingBar]"
         
        
       
      
     
    
   
   
    
     
      
       ξ
       i
       -
      
      <
      
       ξ
       i
      
      <
      
       ξ
       i
       +
      
     
    
   
  
 

in the formula, X={wi} is an optimization variable, and λ is a distribution coefficient.