ANALYSIS HARDNESS CHANGES OF TUBULAR WORKPIECES MADE OF AL 99.5% FORWARD COLD FLOW FORMING PROCESS
<p style="text-align: justify;">Final product of the cold forming process gain many advantages that are mostly produced by strengthening of the material in the process. Those advantages are primarily explained as improving mechanical characteristic of the work material. Because of the effects of strengthening and as one of the specific methods of forming rotationally symmetrical parts in demanding industries increasingly applied forward cold flow forming (FCFF). In this paper is shown an example of forward cold flow forming application process in production of 99,5% Al workpieces with focus on analysis of a strengthening effect of the processed material by the change in its hardness like HB.</p>