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Repair of slewing support shaft of construction machinery tower crane: deformation control of Daokedao laser cladding vs traditional surfacing
Date:2025-11-06 13:54     Source:daokedao     Browse:28

The slewing bearing shaft of the construction machinery tower crane bears a huge radial load. Traditional welding repair requires a large amount of heat input, resulting in shaft deformation exceeding 0.3mm, causing rotation jamming, and the welding layer is prone to cracking, with a repair success rate of less than 60%.

The Daokedao laser cladding equipment adopts low stress cladding technology, with a heat input of only 1/7 of the weld deposit, and the deformation of the rotary bearing shaft is controlled within 0.05mm, without the need for subsequent calibration. Using high hardness wear-resistant alloy powder, the hardness of the cladding layer reaches HRC62-65, and the wear resistance is improved by 4 times.

The service life of the repaired slewing bearing shaft has been extended to 2-3 years, and the slewing stability of the tower crane has been improved by 40%. After adopting this technology, a construction company has reduced equipment downtime losses by more than 600000 yuan per year, ensuring construction efficiency.


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