At present, the angles of the aluminum alloy doors and windows in China are extruded by the angler to make the bottom surface of the aluminum profile combined with the corner code. The working principle of the group angle method is unscientific. When the angle cutter of the angle cutter is placed on the surface of the aluminum profile, the resistance of the aluminum profiles encountered by the two angle cutters during the jacking process is different. The progress of jacking can not be consistent, and the damage stress of the aluminum profile can not be restrained, which causes the shape of the aluminum profile to be partially distorted and affect the angular quality of the group.
In the European aluminum alloy doors and windows, the group angle adopts the group angle method of the active corner code, and its advantages are as follows:
1. The corner joints (active corner code) are connected by high-strength connecting bolts. Compared with the angle of the angled unit, the movable corner code does not damage the chamber of the aluminum profile (the outer dimensions are not distorted). The problem of shifting. Workers can be framed at 15 to 25 per hour per person.
2. The corner joint (active corner code) is subjected to the "L" shape single-angle stress test (up to 35000 Newtons), which is 20 times larger than the angled corner code (about 1800-2000 Newtons). Because the connection structure is unreasonable, when the external pressure is applied to the test angle during the angular strength test, the extrusion of the aluminum alloy profile is affected by the external force, and the final corner code is gradually flattened; and the active corner code is reasonable. The connection structure, the pressure is directly transmitted to the active corner code itself during the test, until the active corner code completely destroys the test corner will be damaged).
3. The biggest advantage is that when the group angle is misplaced, it can be loosened and re-tightened. This is unmatched by the ordinary angled corner code!
4. The active corner code can realize the on-site assembly of doors and windows. The aluminum door and window factory in Europe can do the door and window project in Asia. It is guaranteed by the feature of the active corner code. After the factory receives the order, the aluminum alloy profile is cut and punched. The installation hole of the activity corner code is directly packed, and the movable corner code, door and window hardware, etc. are directly shipped to the site for assembly.
5. Comprehensive cost performance: Although the price of the active corner code is slightly higher than the angle of the angled angle, the ergonomics is 5 to 8 times the angle of the angled unit (5樘/hour/per person); the angle of the angle is The weight of the rice is about 2.0 to 3.2 kg/m, but the unreasonable corner strength due to the group angle cannot be proportional to the weight of the angled corner code.
6. Profile cost: Due to the advanced principle of the active corner code connection, the corner strength is realized by the structure, the amount of aluminum is small, the profile chamber requirement is small (thickness 14 mm) compared with the traditional angle-angled corner code (thickness about For 20 mm), the standard window consumption of the active corner code can save 10% to 15% of the aluminum used in the profile. 
Editor in charge: Wang Zhen
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