Precautions for the use of aluminum profile test and measurement tools

[China Aluminum Industry Network] Aluminium profile temperature measurement directly measured on the surface of the aluminum profile is not accurate, mainly related to the material and surface structure. To measure the relative accuracy, it is necessary to coat the surface with a layer of material, or to coat the surface with a rough, low-reflectivity material, such as a layer of paper tape. The portable infrared thermometer is not good for measuring aluminum profiles, and the temperature fluctuates greatly. If it is a static aluminum profile, it can be painted on the aluminum profile and then the surface temperature of the paint can be measured. If it is exercise, it cannot be measured. It is recommended to use a fixed infrared thermometer with a temperature range of 200°C to 800°C. Or use a surface thermometer to measure the aluminum profile temperature. Aluminium profile surface treatment color difference measurement method Aluminium and its alloy coloring Anodic oxide film (abbreviated anodized aluminum) The reflection characteristics of the surface and other objects conventional reflection characteristics are different. At present, the evaluation of the color and chromatic aberration of colored anodized aluminum at home and abroad is still based on the “visual observation method”, and then the change of color can be estimated by using the Mengsail grey card ratio. The hardness of aluminum profiles is measured. The Cushion Hardness Tester Webster Type B |webster hardness clamp, Webster type B Vickers hardness tester (claw hardness tester) produced by the United States, is used to measure the hardness of various aluminum alloy materials (including aluminum plates, aluminum tubes and aluminum profiles), the measurement process has no damage to the workpiece, and No sampling is required, especially for rapid inspection of products at the production site, sales site or construction site. The Wechsler hardness tester was introduced into China in the early 1980s along with the aluminum profile production line. This kind of hardness tester has been used in China for more than 20 years, and its measurement results have been widely recognized in various aspects. WebsterB Vickers hardness tester has stable performance, small deviation and low failure rate. In addition to its use as a general quality inspection instrument at the production site, it can also be used as a measurement reference instrument within the factory. If such a hardness tester is prepared at the quality inspection department, it can be stored in a good environment, and it is not used frequently, or it can be stored and used by dedicated personnel, and its measurement accuracy can be maintained for a long time. It can be used to periodically check other hardometers frequently used in the production site to detect inaccuracies in the use of the instruments in the field, ensure the integrity and accuracy of these instruments, and avoid the shipment of unqualified products, thereby improving the quality management of the factory. Level. When it is necessary to exchange test results with customers or other quality inspection units, if such an instrument is available at hand, it can be convenient for the factory's test results to be recognized by the other party and improve the reliability of the factory's product quality and detection methods. Although the Webster type B Vickers hardness tester is high in price, it is an important supplement to domestic instruments. In the production of aluminum profiles, measuring tools are just like weapons in the inspection personnel. If the weapon is in a state of semi-paralysis or damage, the test results will not have any meaning, and there will be no supervisory control over product quality. Therefore, the maintenance and care of measuring tools are very important. The following are the maintenance specifications for several measuring tools (applicable to commonly used testing tools): 1. The storage location of the measuring tool should be kept clean and dry, free of vibration and non-corrosive gases, and away from places where the temperature changes widely or where there is a magnetic field. The gauges stored in the measuring case should be clean and dry, and no other debris should be stored. 2. After using the measuring tool, clean the surface stains and aluminum chips and loosen the fastening device. When it is not used for a long time (more than one month), apply anti-rust oil to the measurement surface. When the gage is not in use, it should be put into a protective box, and it should be used by full-time professionals, and be responsible for the annual audit records that the gage is tested by the authority. 3. Do not use grindstone or emery cloth to grind the surface of the gage, the measuring surface and the engraved line. Non-metering maintenance personnel are strictly prohibited from disassembling, refitting, and unauthorized repair of the gage. 4. When the workpiece surface has burrs, be sure to go to the net burr, and then make measurements, otherwise it will wear gauges, and will also affect the accuracy of the measurement results. 5. Do not touch the measuring surface of the measuring instrument by hand. The sweat and other dirt on the hand will contaminate the measuring surface and cause it to rust. Do not mix the measuring tool with other tools and metal materials to avoid touching the measuring tool. 6. Do not use the tip of the caliper's claw as a stylus, compass or other tool. Do not twist the two jaws or use the gauge as a card.