What are the methods to prevent deformation of steel structures?
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| steel structure |
1. When manufacturing steel components, the processing technology should be determined in combination with the actual supply types of materials, processing technology levels, and equipment conditions to reduce the stress and deformation of components.
1) Reduce the number of steel types as much as possible, and reduce the number of component types to prevent component stress and deformation.
2) The size or aperture size of symmetrical parts should be as uniform as possible to facilitate machining; and it is conducive to interchangeability during assembly.
3) Weld the welds reasonably to prevent the distance between the welds from being too close. When the length of the material is greater than the length of the part, reduce or do not make splicing welds; the layout of the welds should be symmetrical to the components. The center of gravity or axis is symmetrical on both sides to reduce welding stress concentration and welding deformation.
4) When joining parts and components, they should be prevented from joining with unequal cross-section and unequal thickness; when joining, the shape and thickness of the cross-section should be changed in the form of a gentle slope, so that the cross-section or thickness at the joint is equal, and the force transmission is smooth and uniform. The force can prevent excessive stress and deformation after welding.
5) The selection of the end of the welding plane of the component should not show an acute angle shape to prevent the heat in the welding area from being most concentrated and the joint to undergo greater stress and deformation.
6) The distance between the edges of the ends of each member of the steel structure of the construction should not be too close. Generally, the staggered distance should not be less than 20mm to ensure the best welding quality and prevent the heat from concentrating and adding stress during welding, which will increase the amplitude of deformation. .
7) The processing equipment used to manufacture steel components on site shall ensure the construction quality requirements.
2. The selection of electric welding machine should ensure the stability of welding current, voltage and load consumption, and to adapt to the welding requirements of different structures and various positions of the weld.
① The communication welding machine is suitable for welding ordinary steel components.
②DC welding machine is suitable for welding steel components with high requirements.
③ Buried solitary welding is suitable for welding long butt or fillet welds such as beams and columns in steel members.
④ Cq gas shielded welding is suitable for welding of thin steel plates with high requirements.
The stake out channels and assembly channels used in the manufacture of steel components should have a standard horizontal surface. In particular, before the auxiliary channels are installed and used, they must be measured by the cable method or the instrument. It should be controlled within the range of 2 ~ 3mm. This can prevent partial bending when assembling the component; the support stiffness of the channel should ensure that the component does not lose stability and sink under the pressure of its own weight to ensure the level of the assembled component.
1) Reduce the number of steel types as much as possible, and reduce the number of component types to prevent component stress and deformation.
2) The size or aperture size of symmetrical parts should be as uniform as possible to facilitate machining; and it is conducive to interchangeability during assembly.
3) Weld the welds reasonably to prevent the distance between the welds from being too close. When the length of the material is greater than the length of the part, reduce or do not make splicing welds; the layout of the welds should be symmetrical to the components. The center of gravity or axis is symmetrical on both sides to reduce welding stress concentration and welding deformation.
4) When joining parts and components, they should be prevented from joining with unequal cross-section and unequal thickness; when joining, the shape and thickness of the cross-section should be changed in the form of a gentle slope, so that the cross-section or thickness at the joint is equal, and the force transmission is smooth and uniform. The force can prevent excessive stress and deformation after welding.
5) The selection of the end of the welding plane of the component should not show an acute angle shape to prevent the heat in the welding area from being most concentrated and the joint to undergo greater stress and deformation.
6) The distance between the edges of the ends of each member of the steel structure of the construction should not be too close. Generally, the staggered distance should not be less than 20mm to ensure the best welding quality and prevent the heat from concentrating and adding stress during welding, which will increase the amplitude of deformation. .
7) The processing equipment used to manufacture steel components on site shall ensure the construction quality requirements.
2. The selection of electric welding machine should ensure the stability of welding current, voltage and load consumption, and to adapt to the welding requirements of different structures and various positions of the weld.
① The communication welding machine is suitable for welding ordinary steel components.
②DC welding machine is suitable for welding steel components with high requirements.
③ Buried solitary welding is suitable for welding long butt or fillet welds such as beams and columns in steel members.
④ Cq gas shielded welding is suitable for welding of thin steel plates with high requirements.
The stake out channels and assembly channels used in the manufacture of steel components should have a standard horizontal surface. In particular, before the auxiliary channels are installed and used, they must be measured by the cable method or the instrument. It should be controlled within the range of 2 ~ 3mm. This can prevent partial bending when assembling the component; the support stiffness of the channel should ensure that the component does not lose stability and sink under the pressure of its own weight to ensure the level of the assembled component.
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