Novel Method of Single-Pass Threading by Cutter

The technological aspects and some results of a new method intended for producing threads and projections of the triangular profile on plastic metals are considered. The method is implemented according to the schemes of traditional machining with a simple tool such as a cutter. The method is intermediate between the threading based on the cutting process with a removal of the workpiece material and the threading based on metal cold flow with a redistribution of the workpiece material and combines both methods. The new principle and high value of the tool rake angle improve metal flow conditions. This leads to a significant reduction in the amount of material removed in the form of chips, reducing the required depth of cut, high surface quality of the thread, possibility of using smaller diametrical dimensions of the workpiece and possibility of using thin-walled tubes for threading. The authors theoretically justified and experimentally confirmed the selection of a manufacturing parameter to obtain a threaded profile of the required geometry.