PSI - Issue 59

Kozulin S. et al. / Procedia Structural Integrity 59 (2024) 391–398 S. Kozulin et al. / Structural Integrity Procedia 00 (2019) 000 – 000

7

397

a

b

Fig. 6. Dependence of the productivity of the repair of through cracks in the casings of rotary furnaces (a), and the specific time spent on welding cracks (b) on the welding methods used in the installation conditions: 1- automatic welding under flux in a narrow gap; 2 - manual welding with covered electrodes; 3 - mechanized welding with powder wire; 4 - automatic welding under flux; 5 - automatic two-arc welding under flux; 6 - MESW CN with a melting mouthpiece for cutting with a volume of 38.3 dm³; 7 - the sam e cutting with a volume of 99.8 dm³.

60

0 20 40 60

ремонтных работ , сут .

18

6

Время

1 3 Способы ремонта сквозных трещин 2

Repair work time, days

Ways to repair through cracks

Fig. 7. Repair time: 1 – replacing the defective tire with a new one; 2 – repair of a through crack using two-arc automatic welding under flux; 3 – the same with the use of a new method of MESW CN. 4. Conclusions 1. Based on the conducted research, the principles of technology for repairing through cracks in large-scale equipment components using the proposed MESW CN method have been developed. This includes decision-making algorithms, repair work organization schemes, specialized technological equipment, and fixtures. 2. The developed technology for correcting through cracks in kiln tires in their operating environment has been implemented at six cement plants. 3. The application of the developed technology has allowed for a significant reduction in the overall time for repair work by 1.5…3 times compared to dual -arc automatic welding with flux. Compared to electrode arc welding methods, the use of MESHW for repairing through cracks in rotary kiln tires eliminates the formation of defects such as incomplete fusion and slag inclusions, which is confirmed by the high operational properties of the restored