1. When manufacturing steel components, the processing technology should be determined in combination with the actual supply variety, processing technology level and equipment conditions of the materials to reduce the stress and deformation of the components.

 

1) Minimize the variety of steel products and reduce the number of component types to prevent stress and deformation of components.

 

2) The size or aperture size of the symmetrical parts should be as uniform as possible to facilitate machining; and it is advantageous for interchangeability during assembly.

 

3) Reasonably curse the weld to avoid the distance between the welds being too close. When the length of the material is larger than the length of the part, reduce or eliminate the joint weld; the weld arrangement should be symmetrical to the component. The center of gravity or the axis is symmetrical on both sides to reduce welding stress concentration and weld deformation.

 

4) When connecting parts and components, avoid connecting with unequal section and unequal thickness; when connecting, change the shape and thickness of the section in the form of gentle slope, so that the section or thickness of the butt joint is equal, and the force is smooth and even. Stress can prevent excessive stress and increase deformation after welding.

 

5) The selection of the end of the welding plane of the component should not have an acute angle shape to avoid the most concentrated heat in the weld zone and large stress and deformation at the joint.

 

6) The distance between the end edges of the rods of each node of the building steel structural parts should not be too close. Generally, the staggering distance should not be less than 20mm to ensure the best welding quality, avoid the heat concentration during welding and increase the stress, and increase the deformation amplitude. .

 

7) Processing equipment used for on-site manufacturing of steel components shall ensure construction quality requirements.

 

2. The selection of electric welding machine should ensure the welding current, voltage stability and load usage, and adapt to the welding requirements of welds of different structures and various positions.

 

1 AC welding machine is suitable for welding ordinary steel components.

 

2 DC welding machine is suitable for steel components with high welding requirements.

 

3 Buried orphan automatic welding is suitable for welding long distance butt joints or fillet welds in beams and columns.

 

4Cq gas shielded welding is suitable for weld welding of high-strength steel sheet structures.

 

The lofting platform and assembly platform for the manufacture of steel components shall have a standard horizontal plane. In particular, the assembly platform must be measured by the wire drawing method or instrument before being used and used. If the local unevenness is used, the horn can be used to adjust the leveling and the local unevenness error. Should be controlled within the range of 2~3mm. This can prevent local bending when assembling the component; the support stiffness of the platform should ensure that the component does not lose its stability and sink under the self-weight pressure to ensure the level of the assembled component.