INVESTIGATION OF A FRACTURED LOWER KNIFE OF A HOT CUTTING SCISSOR

This article analyzes the fracture surface of the lower knife of the hot cutting crank-and-rod scissors. Special attention is paid to the mechanism of crack initiation and propagation, which led to the complete destruction of the working unit. The authors emphasize the need to determine the chemical composition as a guaranteeing factor that ensures the resource and raises the actual resource of operation of this equipment. The paper presents the results of a study of the fracture of equipment with a small service life. It is noted that the operating conditions of heavy-loaded parts affect the overall service life of the equipment.