The size of the installation hole is generally to remove the installation space, because the size of the hole is not necessarily the standard size, but refers to the size after civil painting, and the size of the door and window frame must be smaller than the size of the hole before installation. The contact surface with the hole mainly considers the shock absorption of aluminum alloy door frames, and the reserved space is mainly used to put fillers.

Generally, large and medium-sized projects need to directly install aluminum alloy door frames and holes, and there should be fillers. How much should be reserved depends on the actual construction standards, and 3-5 cm should be reserved for general projects.

The surface of aluminum alloy is bright and shiny after oxidation. The frame is large and can be inlaid with a large area of glass, which makes the indoor light bright enough, enhances the contrast between indoor and outdoor facades, and makes the room more layered. Aluminum alloy itself is easy to be extruded, and the section size of the profile is accurate and the processing accuracy is high, so many owners choose to use aluminum alloy doors and windows in decoration.

Extended data:

In the process of aluminum alloy production, casting defects such as shrinkage cavity, sand hole, air hole and slag inclusion are easy to occur. How to repair defects such as air holes in aluminum alloy castings? If electric welding, argon arc welding and other equipment are used for repair, it is easy to produce side effects such as thermal deformation due to large heat release, which can not meet the requirements of repair welding. The cold welding repair machine uses the principle of high frequency electric spark instantaneous discharge and non-thermal surfacing to repair casting defects.

Because the heat affected zone of cold welding is small, it will not cause annealing deformation, cracks, hard spots and hardening of the base metal. Moreover, the welding strength is high, the auxiliary materials and the matrix are solidified after melting at the same time, and the combination is firm, which can be processed by grinding, milling, filing and the like. , and dense does not fall off. Cold welding repair machine is an ideal method to repair tiny defects such as air holes and sand holes in aluminum alloy.

Baidu encyclopedia-aluminium alloy Chuang

Baidu encyclopedia-aluminum alloy (non-ferrous metal structural material)