Analysis of the integrated working performance of fully pretightened combination frame

In the paper,integrated working performance of fully pretightened combination frame is discussed.Through 3-D FEM,the influences of rigidities of tension rod and upright column and tension rod offset on the working performance of frame are analyzed.The research result shows that the ratio of rigidities between tension rod and upright column,which affects the integration property of frame much obviously,is one of the important parameters for adjusting integration working property of press frame.The rigidities ratio is bigger,the integration property is better.From the ratio angle,the crake and upright column horizontal displacement are obviously affected by the tension rod offset.But to heavy hydraulic-press which has a large work plane,because of the limiters of frame structure,actual tension rod offset is very small and the offset coefficient generally attains several in a thousand.So the effect is very small on integration property.The research results are helpful for the design of heavy hydraulic forging press as well as other press with similar structure.