Processes of partial bulk metal-forming—aspects of technology and FEM simulation

Numerical Analysis of the Cross-Wedge Rolling Process by Means of Three Tools of Stepped Shafts From Aluminum Alloy 7075

“…Main CWR methods [1] Due to this fact in the present paper the authors focused on calculations of lighweight hollow part from aluminium alloy 7075 forming by three tools method. More research in this field is described with details in works [5][6][7][8].The CWR method with three tools assures more stable rolling conditions due to three zones contact between workpiece and tools. Hence, the stability of this process can be disturbed by the different phenomena as: triangulation connected with slipping phenomenon presence or internal wall thickness disturbances in billet sections [2,6].…”

Forming of Semi - Finished Drill Parts by Means of Rolling - Extrusion

“…The implementation of the rolling extrusion technology is not connected, in the assumption, limiting of the product length and allows for any setting of the forming cycle, within the scope of matching of rolls rotational movement and the linear movement of pusher displacing the formed material. This solution connects in itself advantages of the cross -wedge rolling by means of three working tools [3][4][5] with additional possibilities guaranteed by the application of the pusher inserting the billet into the workspace. In that way, the length of the product obtained in this method is limited by a stroke of the pusher and rigidity of the rotating billet, which can undergo buckling.…”

Experimental investigation of three different tube equal channel angular pressing techniques

“…It is noted that the rotating movements of forming mandrel and rollers result from the frictional effect. The hollow shaped, and even internally profiled specimens are produced via flowing off axially opposite to the feed direction by these two implements [14,15]. Another process to fabricate UFG tube is the high pressure tube twisting technique.…”