Spiral steel frame staircase and manufacturing method thereof
A spiral and stair technology, applied in the steel frame spiral staircase and its production field, can solve problems such as difficult operation, low efficiency, and potential safety hazards, and achieve the effects of avoiding potential safety hazards, reducing operational difficulty, and preventing misalignment of steel beams
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[0022] The present invention will be further described in detail below in conjunction with the implementation of the drawings.
[0023] Method 1: Take a steel beam composed of three layers of steel plates as an example, cut off the width of the steel plate 2 according to the design needs, then cut the length and then grind the screw holes for fixing the beam 3 and the two ends of the steel plate 2 according to the designed step , The beam 3 holes in the previous step should be perpendicular to the next step, and then use a three-roller bending machine to bend the steel plate 2 into the required arc, cut the steel pipe into the required size of the beam 3, and cut it for the beam 3 For the plug 8 at the end, make a central hole on the plug 8, weld a nut 9 on the back of the plug 8. When welding the nut 9, plug the center hole with a positioning pin or screw 10 to prevent the nut 9 from being eccentric, and weld it well The plug 8 of the nut 9 and the nut 9 are welded to the two ...
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