The manufacture of large-sized thin-walled parts is a complex, time-consuming and high-tech process, as practice shows. The result of production does not always meet the requirements of the design documentation, which leads to the exclusion of parts from further production and the loss of time spent by a team of specialists and workers. The paper analyses the occurrence of defects leading to faults. It identifies the direct and indirect causes of their occurrence, suggests ways to eliminate them using the control parameters of the technological system: tool path in the control program, cutting conditions, cutting tool geometry. The proposed recommendations, tested in the production process, have significantly improved product quality and reduced production preparation time.
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