The bed is used to support the workpieces of the forging machine. The dynamics of the bed structure directly affects the machining accuracy, precision stability and production efficiency of the forging machine. The design of the bed structure is still a combination of simplified calculation and empirical design of traditional material mechanics. In order to ensure high speed, high efficiency, high precision and high strength of the machine tool design, the bed needs to have sufficient static stiffness and good dynamic characteristics. The finite element method is used to optimize the design of the bed structure to improve its stiffness and anti-vibration ability, reduce the deformation, and reduce the quality of the bed. Static finite element analysis can be used to check the strength and stiffness of the fuselage components, and structural improvement design based on the analysis results, reducing costs and improving efficiency.
The process of finite element analysis is to define the model and its load, and to solve and interpret the results. If the solution results indicate that the design is to be modified, the geometry of the model needs to be changed and then re-executed as described above; when the state of the structure changes, the parameters after the command may also change, and the program must be rewritten.
The first is to choose the appropriate machine bed design, the static and dynamic characteristics of the bed and its structural size, shape and layout of the ribs have a lot to do. Under the premise of not changing the size of the machine bed, in order to ensure the assembly effect of the whole machine, a variety of bed structure design schemes for different rib layouts were designed, and the various schemes were compared to the bed stress. The effect of deformation and natural frequency, from which the best solution is selected.
Secondly, after the preferred procedure, the finite element analysis of the bed structure is carried out. The forging machine is more complicated when forging parts. It is often affected by many factors such as stamping speed, stamping contact area and stamping depth. Static analysis is carried out. Through static analysis, materials that are both economical and environmentally friendly are selected. After the materials are selected, the modal analysis of the bed is carried out. This process can also be analyzed by the finite element model. The structural optimization of the machine bed can improve the shock resistance of the forging machine.
Finally, the optimal design of the machine bed structure is the key step is to select the appropriate optimization target and design variables. The optimization design of the forging machine bed is to optimize the bed quality, by reducing the total mass of the bed. Save material, reduce production costs, optimize the target mainly depends on the quality value, and minimize the expected value. The results are verified after the optimization is complete.