Precision roll bending method, system, and electronic equipment for cylinder with variable curvature section

A precision roll bending method for cylinder with variable curvature section, comprising:

• obtaining process parameters of roll bending of a target cylinder, and establishing a rebound compensation equation based on force analysis of the roll bending;
• the target cylinder comprises multiple are segments;
• carrying out rebound simulation of cylinder roll bending based on the process parameters to obtain a first simulation result, and determining influence factors of rebound compensation error based on distribution of rebound amount in the first simulation result;
• setting multiple sets of different preset influence factor values of the influence factors of rebound compensation error;
• based on the multiple sets of preset influence factor values, combined with the process parameters, carrying out the rebound simulation of roll bending of different arc segments to obtain a second simulation result;
• fitting multiple sets of preset influence factor values and corresponding rebound compensation errors in the second simulation result, and obtaining expression of rebound compensation error;
• modifying the rebound compensation equation according to the expression of rebound compensation error, and carrying out precise control of roll bending of the target cylinder according to the modified rebound compensation equation and the process parameters;
• wherein, fitting multiple sets of preset influence factor values and corresponding rebound compensation errors in the second simulation result, and obtaining expression of rebound compensation error, comprising:
• based on Response Surface Methodology, multiple sets of preset influence factor values and corresponding rebound compensation error amounts in the second simulation result are fitted to obtain an expression for the rebound compensation error amount;
• the expression for the rebound compensation error amount is a polynomial with the rebound compensation error influence factor as independent variable and rebound compensation error amount as dependent variable;
• wherein, the factors affecting the rebound compensation error comprise forming radius and forming arc length of three adjacent arc segments in the target cylinder;
• wherein, the modified rebound compensation equation is:
• r′=f(r+μ)
• where, r′ represents the curvature radius of inner surface of the target cylinder before rebounding, r represents the curvature radius of the inner surface of the target cylinder after rebounding, and r′=f(r) represents the rebound compensation equation before correction, u represents the expression of the rebound compensation error amount.