S-shaped bridge expansion joint positioning and shaping device

Abstract

The invention relates to a welding tool of a bridge expansion joint and particularly relates to an S-shaped bridge expansion joint positioning and shaping device. The device includes not less than three pressing cylinders, shaping cylinders and clamping cylinders, wherein the pressing cylinders are fixed at the bottom of an upper beam and are arranged on the center line of the upper beam, the clamping cylinders are fixed in parallel at one side of the top of a lower beam, the shaping cylinders are fixed in parallel at the other side of the top of the lower beam, the pressing cylinders, the shaping cylinders and the clamping cylinders are equally spaced, the top of half-finished products of S-shaped steels is pressed and shaped by the pressing cylinders, both sides of the S-shaped steels are pressed by the clamping cylinders and the shaping cylinders, and linearity of the half-finished products of the S-shaped steels is adjusted. The device is advantaged in that the device is simple instructure, is convenient to use and has high shaping precision, good shaping effect, good consistency, small shaping deformation, high work efficiency and low production cost.

Description

technical field [0001] The invention relates to a welding tool for bridge expansion joints, in particular to an S-shaped bridge expansion joint positioning and shaping device. Background technique [0002] Bridge expansion joints refer to expansion joints usually set between two girder ends, between girder ends and abutments, or at the hinged position of the bridge in order to meet the deformation requirements of the bridge deck. It is required that the expansion joints can freely expand and contract in two directions parallel to and perpendicular to the bridge axis, and are firm and reliable. The vehicles should run smoothly without sudden jumps and noises; they should be able to prevent rainwater and garbage from infiltrating and blocking; installation, inspection, and maintenance , Elimination of dirt should be simple and convenient. Where expansion joints are set, railings and bridge deck pavement must be disconnected. The function of bridge expansion joints is to adju...

AI Technical Summary

Problems solved by technology

The S-shaped steel semi-finished product will be deformed due to welding and internal stress. The deformation of the S-shaped steel semi-finished product will bring difficulties to the subsequent welding of the vertical plate, stiffener and anchor plate. Scribes and fixtures are often used for positioning welding in production. Adding heavy objects to the semi-finished steel shape for shaping not only reduces production efficiency and difficulty in shaping, but also has low welding accuracy and poor consistency, and the deformation cannot be controlled during the welding process, resulting in difficult welding, large welding deformation, long follow-up shaping time, and high processing costs

Images