Technical Article

Introduction to stiffness analysis of hydraulic press prestressed tension rod based on measured data

The forging industry is the foundation of the manufacturing industry, and the forging level is an important indicator to measure the level of the national machinery industry. With the rapid development of China's manufacturing industry, there is an increasing demand for large tonnage fast forging presses. Almost all large fast forging hydraulic presses at home and abroad adopt fully pre tensioned combined frames, which are equipped with multiple sets of pre tensioned tension rods. This structure has good mechanical properties and can effectively reduce the overall quality of the frame. As a key load-bearing component in the frame, the prestressed tension rod bears cyclic alternating loads, and its actual strain state is related to the fatigue life and safe use of the fast forging hydraulic press.

When the prestressed composite frame is in operation, the preload force is the sum of the forging force and the force between the column and the crossbeam, and the force between the column and the crossbeam is negatively correlated with the forging force.

Under the rated preload force of the fast forging hydraulic press, the deformation of the tension rod after loading is relatively small compared to the deformation under no-load, indicating that the tension rod does not elongate during loading.

Under the same operating conditions, the simulation results were compared with the theoretical calculation results when unloaded, and the accuracy reached 99.1%; The simulation results were compared with the test data during loading, and the accuracy reached 96.7%, proving the accuracy of the finite element simulation results.