(1) Material Cutting. Material cutting, also known as "cutting," is the first and crucial step in the manufacturing of aluminum alloy doors and windows. Cutting is primarily done using cutting equipment. The material length should be determined based on design requirements and the detailed construction drawings of the doors and windows. Accurate cutting is essential; otherwise, the squareness of the doors and windows cannot be guaranteed. The dimensional error of the cut material should be controlled within 2mm. Generally, right-angle cutting is preferred for sliding doors and windows; 45° angle cutting is preferred for casement doors and windows; other types should select the cutting method based on the assembly method.
(2) Drilling. The frame and sash assembly of aluminum alloy doors and windows generally uses screw connections. Therefore, whether assembling horizontal and vertical members or fixing accessories, holes need to be drilled at the corresponding positions. Small bench drills or pistol drills can be used for drilling profiles. The former, with its workbench, effectively ensures the accuracy of the drilling position; while the latter is more convenient to operate. Before drilling, the profile should be marked with lines according to the assembly requirements. The drilling position must be accurate and the hole diameter appropriate. Repeated drilling on the profile surface is not allowed, as holes are difficult to repair once formed.
(3) Assembly. Assemble the profiles using screws and connectors according to the construction details. There are three assembly methods for aluminum alloy doors and windows: 45° angle butt joint, right angle butt joint, and vertical butt joint. For horizontal and vertical bars, special connectors or aluminum angle brackets are generally used, followed by screws, bolts, or aluminum rivets for fixing. The assembly quality of aluminum alloy doors and windows should meet the following requirements: ① The decorative surface of doors and windows should not have obvious damage. Local scratches and abrasions on each door and window should not exceed the requirements in Table 1. ② There should be no obvious color difference between the colored surfaces of adjacent components on doors and windows. ③ The surface of doors and windows should be free of aluminum shavings, burrs, oil stains, or other dirt. There should be no excess adhesive at the assembly joints. ④ The dimensional deviations of the door and window frames should meet the requirements. ⑤ Assembly gaps between adjacent components of door and window frames and sashes, and height differences on the same plane.
