When a full-hydraulic auto overweight machine is working as a heavy object, a car (?) accident may occur if it is operated in violation of regulations or improperly commanded. Causes the telescopic wall rod to bend (?) The repair arm correction machine is described below. The arm assembly is composed of several arms that are sleeved together, and the gap between the arms is small, generally 2 to 5 mm. The arm should not only have sufficient strength, but also have good resistance to bending and anti-distortion. The deflection should not exceed 3 mm in the full length (about 1×10~4mm). Self-designed NK-200T crane boom correction machine (Fig. 1) consists of base (rectangular structure) 3, gantry (H-shaped structure) 5, long shaft (sleeve) 6, beam (channel) 7 and jack (1 ×10~6N)8 and other components. Working range: the cross-sectional dimensions of various arms are less than 80
