Abstract
The researches aimed to obtain data to design technologies based on cold plastic deformation in order to achieve profiles on parts through form tapping, as well as to obtain measurement data to validate some models of simulation of the finite elements deformation process. This paper presents a part of these researches, those connected to establishing the forming equation when processing profiles corresponding to the trapezoidal thread. The experiments were conducted on four representative materials, two types of plain steel, OLC15, OLC35, and two alloy steels with Cr and Mn, 18MnCr11, 40Cr10, on profiles corresponding to trapezoidal threads, for different depths of profiles and for different values of the working feed. In order to obtain the measurement data we had to set a few adequate methods and experimental research means. There were determined the equations of the maximum forming forces, equations established represent a useful tool for technology designers.
Keywords: Cold Plastic Deformation, Form Tapping, Forming Force, Trapezoidal Thread