First, the quality control of aluminum doors and windows production process
1. The quality control of raw and auxiliary materials The suppliers of raw and auxiliary materials used in the production of aluminum doors and windows have achieved ISO international quality certification and have a complete quality system. However, the actual situation in China shows that there are still unqualified supplies for Customer phenomenon. Therefore, in the production of aluminum doors and windows, all purchased raw materials must undergo strict quality inspection and control before entering the warehouse.
(1) The main quality control content of aluminum alloy profiles
1 has a product quality guarantee;
2 The thickness of the aluminum profile, the thickness of the oxide film or coating composite film, and the hardness, etc., shall conform to the national standard GB/T5237.1-2000, or meet the design and production requirements of aluminum doors and windows products;
3 aluminum appearance surface quality, color should be consistent with the model.
(2) Main quality control of hardware accessories and auxiliary materials 1 Stainless steel sliding bearing quality control Inspection of product certification; testing material quality, testing the magnetic properties of stainless steel with a magnet; measuring its key triangular positioning size and hole affecting installation quality with vernier caliper From the size, as well as the thickness, width, etc. of the material, the rest is to be controlled according to GB 9300-88.
2 The linkage handler shall compare the model provided in advance, check the certificate of conformity and warranty, and test the rest in accordance with GB9298-88.
3 Quality control of aluminum alloy door and window locks and ball locks Sampling inspection Appearance and structural quality should be consistent with the model, open and close should be flexible, and other test and control according to GB9302/9303-88 and GB8388-87 standards.
4 The quality of the floor springs, door and window pulleys and self-tapping screws should be consistent with the samples, and the inspection certificate, warranty book and the rest should comply with GB9296-88, GB9304-88, and GB845/846-85 standards, respectively.
5 Quality control of core-pulling nails and silicone building sealants Quality control of these two materials must be tested in real-life tests. The common quality problem of core-pulling nails is that the outer cladding material is soft and does not meet the expected fastening effect. In particular, the unqualified part is often concealed, and it is easy to cause serious quality accidents. Therefore, the quality of this material should be strict. Control, often check supervision. For the quality control of the sealant, whether it is glass glue or external wall glue, the purpose of the physical test is to observe its fluidity, prevent over-leanness, adherence, surface dryness, and overall curing speed. The poor quality of the sealant generally manifests itself in poor leanness, high fluidity, poor adsorption performance and long overall cure time, often resulting in poor quality aluminum door and window products.
6 Quality control of accessories such as sealant strips and horizontal and vertical tops The quality control of these attachments is mainly to compare with the pre-provided templates or conduct physical tests to check whether the quality meets the design requirements of aluminum doors and windows.
2. Cutting and machining process quality control
(1) The quality control of aluminum sawing blanking is mainly to strictly control the accuracy of length dimension and angle. The length dimension of door and window frame material is usually controlled to be positive value <0.5-0.0mm: the length of door and window fan material is usually controlled to a negative value of -0.5-0.0mm. The angular opening of the door and window frame and the fan material must ensure that the angle of the aluminum profile to be opened is accurate, and the physical docking test is conducted to meet the design requirements.
(2) The quality control of the aluminum, window, door, window, boring, milling, drilling, punching and shearing of these machining processes is mainly based on the dimensions and relevant quality requirements determined by the design drawings and technical and technical cards for aluminum doors and windows. In order to reduce errors and unnecessary losses, it is necessary to accurately debug the knives, dies, drills, etc. of the relevant mechanical equipment before work, and after the size debugging is confirmed to be correct, it can be put into large-scale operation and production. At the same time pay attention to remove a small amount of unqualified aluminum profiles to prevent inflows to the next process. In addition, during operation, a certain period of time is required to detect the size of the processed objects to prevent deviations caused by mechanical failures, and then to control the cleanliness of the machining operation platform and the surface of the clamps, and to remove aluminum dust and foreign materials. Damage to the finish. When necessary, aluminum profiles are wrapped in protective tape before opening to ensure product quality.
3. Assembly packaging
(1) Quality control in the assembly process The assembly has a greater impact on the quality of aluminum doors and windows. It is a key process for quality supervision and inspection by quality control departments and quality control personnel. The assembly of aluminum doors and windows is based on design drawings and technology cards. Specific quality control includes:
1 Notch width control <2000mm is ±1.0mm;
2 The difference between the size of the notch on the side of the door and window is less than 2000mm is ±1.0mm;
<3500mm,>2000mm is ±1.5mm;
3 The difference between the diagonal size of the door and window notch is less than 2000mm is ±1.0mm;
<3500mm,>2000mm is ±1.5mm;
4 The same plane height difference control <0.5mm;
5 assembly clearance control <0.3mm;
6 opening and closing, to be flexible without blocking, opening and closing force ≤ 50N;
7 height deviation control <3500mm,> 2000mm is ± 1.5mm;
>3500mm is ±2.0mm;
8 accessories are accurate;
9 The components are firmly connected, such as locks, wheels, hinges, handles, screws, etc.
10 Door and window finishes are of good quality without damage, dents, deformation, etc.
(2) Package Quality Control
The quality control of aluminum doors and windows packaging process is mainly to clean the oil stains and surface attachments and dust. For the protective adhesive tape on the decorated bread, the surface of the walled profile is coated with uniform asphalt protection, the product is affixed with a certificate of conformity and the corresponding number is accurately written.