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

Claim 1:
2. The emulsion flow optimization method for suppressing vibration of a cold continuous rolling mill according to claim 1, wherein the step S6 comprises the following steps:
(S6.1) calculating a neutral angle γi of each rolling stand:, γ
    i
   
   =
   
    
     1
     2
    
    ⁢
    
     
      
       
        Δ
        ⁢
        
         h
         i
        
       
       
        R
        i
        ′
       
      
     
     [
     
      1
      +
      
       
        1
        
         2
         ⁢
         
          u
          i
         
        
       
       ⁢
       
        (
        
         
          
           
            Δ
            ⁢
            
             h
             i
            
           
           
            R
            i
            ′
           
          
         
         +
         
          
           
            T
            
             i
             ⁢
             0
            
           
           -
           
            T
            
             i
             ⁢
             1
            
           
          
          
           P
           i
          
         
        
        )
       
      
     
     ]
    
   
  
  ;
 

(S6.2) calculating to obtain, u
   i
   +
  
  =
  
   
    1
    
     2
     ⁢
     
      (
      
       
        2
        ⁢
        
         A
         +
        
       
       -
       1
      
      )
     
    
   
   ⁢
   
    (
    
     
      
       
        Δ
        ⁢
        
         h
         i
        
       
       
        R
        i
        ′
       
      
     
     +
     
      
       
        T
        
         i
         ⁢
         0
        
       
       -
       
        T
        
         i
         ⁢
         1
        
       
      
      
       P
       i
      
     
    
    ), from the step S5 and the step S6.1 assuming that when, γ
     i
    
    
     α
     i
    
   
   =
   
    A
    +
   
  
  ,, a roll gap is just in an over-lubrication state;
(S6.3) calculating an over-lubrication film thickness critical value ξi+ of each rolling stand according to a relation formula between the first friction coefficient ui+ and an oil film thickness wherein ui+=ai+bi·eBi·ξi+ in the formula, ai is a liquid friction influence coefficient, bi is a dry friction influence coefficient, and Bi is a friction coefficient attenuation index, and wherein, ξ
    i
    +
   
   =
   
    
     1
     
      B
      i
     
    
    ⁢
    ln
    ⁢
    
     
      
       u
       i
       +
      
      -
      
       a
       i
      
     
     
      b
      i
     
    
   
  
  ;
 

(S6.4) calculating to obtain, u
   i
   -
  
  =
  
   
    1
    
     2
     ⁢
     
      (
      
       
        2
        ⁢
        
         A
         -
        
       
       -
       1
      
      )
     
    
   
   ⁢
   
    (
    
     
      
       
        Δ
        ⁢
        
         h
         i
        
       
       
        R
        i
        ′
       
      
     
     +
     
      
       
        T
        
         i
         ⁢
         0
        
       
       -
       
        T
        
         i
         ⁢
         1
        
       
      
      
       P
       i
      
     
    
    ), from the step S5 and the step S6.1 assuming that when, γ
     i
    
    
     α
     i
    
   
   =
   
    A
    -
   
  
  ,, a roll gap is just in an under-lubrication state;
(S6.5) calculating an under-lubrication film thickness critical value ξi− of each rolling stand according to a relation formula between the second friction coefficient ui− and an oil film thickness wherein ui−=ai+bi·eBi·ξi−, and wherein, ξ
    i
    -
   
   =
   
    
     1
     
      B
      i
     
    
    ⁢
    ln
    ⁢
    
     
       
      
       
        u
        i
        -
       
       -
       
        a
        i
       
      
     
     
       
      
       b
       i
      
     
    
   
  
  ;, and
(S6.6) calculating a vibration determination index reference value ξ0i, wherein, ξ
   
    0
    ⁢
    i
   
  
  =
  
   
    
     
      ξ
      i
      +
     
     +
     
      ξ
      i
      -
     
    
    2
   
   .