The author’s variant of preparing for machining the ends of the knuckled branch for welding is proposed. The authors build their research based on the normative document requirements regulating the geometric and technical characteristics of the product. The authors propose their own option, substantiated in the work, for measuring the knuckled branches with further machining according to the developed algorithm. This algorithm allows performing a comparative assessment of the real geometrical parameters of the workpiece resulting from the measurement with the normative data in the state standards. The findings presented in the paper can be useful not only for researchers performing similar work, but also for production engineers involved in automating control and diagnostic processes, as well as maintaining and repairing equipment.