Investigation of defects in the support rollers of the sheet-transmitting system of the printing machine

A printing press is a complex technical system that includes a large number of rotating parts (shafts, gears, etc.), including bearings and support rollers. The appearance of defects in bearing assemblies can lead to serious consequences, such as equipment failure and jamming of shafts, which will lead to a halt in production or the appearance of defective printed products. The purpose of the work was to study defects in the support roller of the gripper shaft, which is responsible for transferring the sheet inside the printing section. The defects of the outer ring of the support roller are considered in the article. With the help of a control and measuring machine, the changes that occur in its geometry are studied. The research was carried out on the new roller, as well as on the rollers that came out of operation, the changes that occur during operation were revealed. Also, with a tenfold increase, defects that occur on the surface of the ring that appeared during operation, such as abrasive wear, traces of fatigue, were studied.