METHOD FOR OBTAINING A KEY CONNECTION ON SHAFTS BY SPOT ELECTROMECHANICAL PROCESSING Russian patent published in 2022 - IPC F16B3/00 B23P11/00 

FIELD: mechanical engineering.

SUBSTANCE: invention relates to the production of a key connection on shafts. The key is installed in the key slot with a gap. Heating and plastic deformation of the key slot of the shaft is carried out point-by-point with an electrode tool for electromechanical processing, which is installed from above at an angle of 15…55° to the vertical plane and at a distance of 1…2.5 mm from the edge of the shaft to ensure precipitation and distribution of shaft metal towards the slot. The distribution of the shaft metal is limited to the key. Treatment is carried out intermittently with points (sections) of a rounded shape with an area of 3…80 mm². The first point is processed in the middle of the key slot, the second point is processed at the beginning of the key slot, after which the following points are processed in reverse order towards the end of the key slot with a certain step providing a distance between the points of 0…10 mm.

EFFECT: simplification of the method and an increase in the efficiency of obtaining a tight key connection on the shafts with simultaneous hardening of the side surface of the keyway.

1 cl, 3 dwg