Method for bonding polytetrafluoroethylene plate on bottom surface of cable saddle

Abstract

The invention discloses a method for bonding a polytetrafluoroethylene plate on the bottom surface of a cable saddle. The method comprises the following steps: 1, cleaning and drying the current area of the bottom surface of a saddle body and the naphthalene sodium surface of the current polytetrafluoroethylene plate; 2, adhesive is evenly smeared on the current area of the bottom face of the saddle body; a polytetrafluoroethylene plate is laid on the bottom surface of the saddle body according to the design; exhausting air in the combination seam; 3, covering a protection pad on the pushing surface of the polytetrafluoroethylene plate; a heat transfer tool is placed on the protection pad; arranging electric heating sheets on the heat transfer tool, and placing a compacting object on the heat transfer tool; 4, an electric heating piece is started, heat output by the electric heating piece acts on the polytetrafluoroethylene plate through a heat transfer tool and a protection pad, and the temperature of the pushing face of the polytetrafluoroethylene plate is higher than the room temperature and lower than the melting point temperature of the polytetrafluoroethylene plate; continuously heating for at least 1 hour; 5, closing the electric heating sheet, and naturally cooling to room temperature; removing the pressing object, the electric heating sheet, the heat transfer tool and the protection pad; and quality inspection. According to the invention, the polytetrafluoroethylene plate can reliably form hot-pressing bonding forming on the bottom surface of the saddle body, and the hot bonding quality of the polytetrafluoroethylene plate on the bottom surface of the saddle body is effectively improved.

Description

technical field [0001] The invention relates to a method for forming a cable saddle of a suspension bridge, in particular to a method for forming a thrust friction pair structure (tetrafluoro plate) of the suspension bridge at the bottom of the cable saddle, and more particularly, a method for directly thermally bonding four parts on the bottom surface of the cable saddle. Fluoroplate method. Background technique [0002] In the construction process of the suspension bridge project, in order to adapt to the change of the main cable's empty cable state and the load state of the completed bridge, the main cable saddle needs to be pre-biased to one side of the side span by a certain distance during installation. With the progress of the bridge project , the main cable saddle is gradually pushed up, so that the forces on both sides of the main tower tend to be balanced. That is to say, the pushing process of the main cable saddle of the suspension bridge is actually by changing...

AI Technical Summary

Problems solved by technology

However, due to the large volume and complex structure of the cable saddle structure, it is impossible for the PTFE plate to be thermally bonded to the bottom surface of the saddle body by heating one side of the saddle body, nor is it possible to heat the PTFE plate directly to the bottom surface of the saddle body. The PTFE plate is thermally bonded to the bottom surface of the saddle body

Therefore, the direct bonding of the PTFE plate on the bottom surface of the saddle body is usually realized by cold bonding. The bonding strength between the PTFE plate and the bottom surface of the saddle body is relatively low, and it cannot reliably carry a large tonnage of jacking force. Can not meet the technical requirements of large saddle body

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