METHOD TO RESTORE WORN-OUT FOUR-WING KNIFE Russian patent published in 2014 - IPC B23P6/00 B23P15/28 

FIELD: machine building.

SUBSTANCE: method implies deposit welding of the knife blade surface carried out sequentially from two sides in radial direction from the blade tips in fracture cones by the value equal to 1/3 of the knife blade length along the worn-out cutting edges by zigzag rollers. Electrode is imparted with transverse vibrations with the amplitude whose value is in direct proportion to the magnitude of wear.

EFFECT: invention allows improvement of restored four-wing knife quality due to deposit welding of additional metal compensating the wear onto nonworking surfaces of knives with maximal possible approaching to the fracture cones.

2 dwg