Abstract: The dynamic process of the buffering installation of cold extrusion press at work is analyzed firstly.Following, a mechanics model is proposed and a differential equation of inertia balance of buffering slide is set up and the systematical calculation is carried out and a number of results which have a great meaning are obtained. Then the experimental study has been carried out, the extrusion load and the stress waves and data on die and frame have been measured when the various blank materials were extruded in adopting various buffering parameters. Finally, on this basis the rule of the effect of buffering parameter on the peak-value and curve form of extrusion load and extrusion velocity and dynamic stress in the relative component has been sumed up, and it has been found that the effect of the forward slope of impact load curve on the dynamie response of component is very great.

Key words: cold extrusion press, extruding impact load, buffering installation, buffering parameter, dynamic process