来源：http://www.jndclyyxgs.com 发布时间：2021-11-16 15:39:36
1. The installation plate has no side ribs and vertical ribs, and deformation occurs under air pressure and gas expansion
This kind of deformation mostly occurs on the curtain wall aluminum plate set with metal composite plate. At present, many building community owners adopt unreliable manufacturers in order to better save costs. In order to obtain higher profits, the manufacturer does not install side ribs and middle ribs in the production and processing of the plate. Only the aluminum plastic plate is stacked into a box shape, and immediately screw it on the structure with screws. The gap between the plates is coated with glue, and the sealing is even completed. In that way, the compressive strength of the plate of the curtain wall aluminum plate can not meet the requirements, and the plate will cause the fatigue deflection value deformation inward and outward under the effect of positive and negative pressure, so as to improve the surface specification.
The aluminum plate of curtain wall reflecting the very obvious sunrise surface, because the construction technology is to use the way of thermal insulation and warm wall to seal all the plate gaps tightly with glue. The gas in the distance between the surface and the structural wall increases the temperature under the effect of sunlight, and the plate changes to the shape under the effect of gas expansion.
2. The plate and the aluminum plate structure of the curtain wall are fixed, and the internal stress cannot be relaxed, resulting in deformation
Aluminum alloy plate curtain wall aluminum plate has large temperature difference in seasons. In the season of low temperature after early spring and autumn, the solar radiation thermal efficiency is very strong, especially the temperature rise of aluminum alloy plate with deep color is relatively large, and the thermal deformation value of aluminum alloy plate per meter is quite different under different ambient temperatures. The aluminum plate structure of curtain wall is inside, and the solar harm is poor. When the aluminum alloy plate and the structure are large, it can cause a temperature difference above 80 ℃, and a large linear surge difference will occur when the specification of aluminum alloy plate is too large. If the blank holder is selected for the structure of the aluminum plate plate of the curtain wall, and the aluminum alloy plate is fixed on the structure with screws, the internal stress on the surface of the aluminum alloy plate cannot be released, driving the surface to compromise and deform outward under the effect of gas.
3. In situ stress deformation caused by the installation of control panel and side rib
In order to deal with the internal stress and deformation on the surface of aluminum alloy plate, some manufacturers, especially when the metal composite plate is selected for the control panel, add a ring of edge rib frame near the parts plate. From the production process flow, the control panel planes the groove and folds the edge into a box shape according to the plate blank holder specification on the grooving machine.
The other line is to disconnect and assemble the edge rib aluminum profile into an edge rib frame according to the specifications of the plate. Then install the side rib frame into the box control panel and fix the two bodies with pull rivets. During the work, it is often found that there is an error in the groove folding of the control panel, and there is an error in the assembly of the edge rib aluminum profile into the frame. The two bodies often cooperate with each other. It is not the frame that urinates, but the specification of the plate folding is too large. In order to ensure the construction period and cost no materials, the installation is usually forced, resulting in the installation in-situ stress on the surface, which is either the edge rib deformation or the surface stress deformation. This kind of plate causes outward deformation under the action of temperature and gas surge.
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