Why do hot die forging hydraulic presses pay special attention to the stiffness of the fuselage?

Why do hot die forging hydraulic presses pay special attention to the stiffness of the fuselage?

The working precision of the hot die forging hydraulic press during press processing has a direct impact on the forming process of the workpiece and the quality of the forming precision. Since the working accuracy cannot be effectively measured and analyzed in the actual work of the hydraulic press, the measurement of the stiffness of the hydraulic press in the loading project can be effectively realized. Therefore, the above problems that cannot be actually measured can be solved by analyzing the relationship between the stiffness of the hot die forging hydraulic press and the working accuracy .

The finite element analysis and classical force calculation of the hot die forging hydraulic press are carried out. The hydraulic press-mold coupling model is established, and the stiffness and strength of the hydraulic press are obtained by numerical analysis methods; the stress and deformation of the upper and lower beams and pillars are checked by the method of material mechanics. On the basis of stiffness detection, compared with the above two analysis results, the accuracy of the design model and simulation analysis results is verified, and reliable stiffness data can be provided for the research on the relationship between hydraulic press stiffness and working accuracy.

Optimize the design of the main engine of the hot die forging hydraulic press. Through stiffness sensitivity analysis and mass sensitivity analysis, seven optimization variables affecting stiffness and mass are determined, and a parametric finite element model is established. According to the results of the orthogonal test, a response surface model was established for the stiffness and mass of the hydraulic press, and multi-objective optimization was carried out. After optimization, the stiffness of the upper and lower beams increased by more than 10%, and the mass decreased by about 5%.

Based on the accuracy of the finite element simulation of the stiffness of the hot die forging hydraulic press, the finite element simulation of the hydraulic machine-die coupling model is carried out with the load boundary conditions provided by the formed parts, and the accuracy-upper and lower beam stiffness response surface model is established through the analysis results. Predict the working accuracy of hydraulic presses.

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