Research and development of a method for repairing of the turntable circle parts for building tower cranes by automatic deposition of the gradient structure layers

Abstract

The estimation of the main cause of failures of tower cranes and characteristic defects in the details of the support-rotating wheel (SRW) is given. The analysis results of the existing methods for the performance extending of the SRW elements are adduced.

A technology for a high-performance method of repairing the SRW by automatic surfacing with the deposition of layers with a gradient structure is proposed and metallographic studies of the deposited metal were carried out.

Keywords:

• Support-rotating wheel
• bearing race defects
• automatic deposition
• gradient structure