Method for manufacturing double-spiral steel staircase without middle standing pillar

Abstract

The invention discloses a method for manufacturing a double-spiral steel staircase without a middle standing pillar. The staircase is formed by welding stairs, stair fixing layers and a staircase platform. The method comprises the following steps: carrying out the three-dimensional lofting by using a computer, so as to decompose the staircase into bent plate components; calculating the length, width, bending radius and planar cutting line position of each bent plate component; feeding and cutting materials by a numerical-control cutting machine; manufacturing the bent plate components; checking the bent plate components; manufacturing a jig; lifting the bent plate components onto the assembly jig, to check and locate the bent plate components, and welding the bent plate components into box-type components; lifting the stair fixing layers onto the assembly jig, so as to locate the stair fixing layers, then, lifting the staircase platform onto the stair fixing layers to mount and fix the staircase platform, and carrying out the integrity acceptance; numbering the stairs, the stair fixing layers and the staircase platform, then lifting the stairs, the stair fixing layers and the staircase platform off the assembly rig, sand-washing and coating; and carrying out the integral installation. By using the method for 'breaking up the whole into parts', the invention increases the accuracy of the single component, ensures the integrity of the double-spiral steel staircase and guarantees the overall quality.

Description

technical field [0001] The invention relates to a manufacturing method of a steel staircase, in particular to a manufacturing method of a double-helix steel staircase without an intermediate column. Background technique [0002] A pair of spiral staircases are set inside the west tower of Zhujiang New Town in Guangzhou. The double helix staircase is a curved and twisted space structure, and the section of the staircase is trapezoidal; the staircase is used for vertical traffic between the 70th and 72nd floors of the West Tower of Guangzhou Zhujiang New Town. The known box-shaped bending member is manufactured using traditional mold technology and traditional pyrotechnic bending technology. However, for the production of thick plate special-shaped large-size box-shaped bending and torsion members, if traditional mold technology and traditional pyrotechnic bending technology are used, there will be weak welding, large deformation, large stress, many errors, high cost, and ene...

AI Technical Summary

Problems solved by technology

However, for the production of thick plate special-shaped large-size box-shaped bending and torsion members, if traditional mold technology and traditional pyrotechnic bending technology are used, there will be weak welding, large deformation, large stress, many errors, high cost, and energy consumption. Technical problems such as large size and low construction efficiency

Images