Electromechanical hardening of the working surfaces of flange coupling splines of 150.41.275-1 PTO shaft drive.

Movable straight-sided splined joints are widely used in designs of modern tractors, automobiles and agricultural ma-chines for transmission of the rotational moment, whereas their wear can reach significant values during operation. Electromechanical hardening of the working surfaces of the splines can be considered a rational way to increase wear resistance and durability of spline couplings and joints as a whole. The paper considers results of practical implementation of the method of electromechanical hardening of the working surfaces of the flange coupling splines of 150.41.275-1 PTO drive. As a result of the research, it was revealed that hardness of the working surfaces of the couplings splines increased significantly after electromechan-ical hardening. Based on the obtained results and taking into account the above technology of electromechanical hardening, a scheme was proposed with three production options of spline couplings. A comparative effectiveness analysis of the existing methods and the proposed method of production of PTO drive flange couplings was carried out. Couplings with a hardened working surface of the splines are installed on the machinery and are currently being tested in real operating conditions at the enterprises of Ulyanovsk region. [ABSTRACT FROM AUTHOR]