5 million cylinder heads, 4 million cylinder blocks,
1.5 million structural parts, 5 million shells
……
Behind the huge output,
How is quality control carried out?
In the experimental center of Jiading Enterprise Huayu Pierburg Nonferrous Parts (Shanghai) Co., Ltd., each auto parts leaving the factory will undergo a 360-degree "physical examination", blue light scanning, metallographic detection, industrial CT... Every quality detail that cannot be seen or touched is strictly controlled.
Blu-ray scanning, point-to-point comparison
Substandard part sizes can cause welding errors, which can lead to overall dimensional deviations in the body. These deviations accumulate deviations in the vehicle manufacturing process, which will affect the dimensional accuracy of the body and the quality of the vehicle. Therefore, the dimensional accuracy of parts must be strictly controlled, and all welded parts must be inspected before they can be put into use.
"We obtain the surface data of the part through three-dimensional scanning, compare it with the digital module point-to-point, know the size of the error value, and complete the quality inspection." Zhang Minhong, head of the Pierburg Quality Inspection Section, said that as a key part of the production of automobile vehicles, the production of auto parts is similar to the general manufacturing industry, but different, with a more stringent quality assurance system, "the use of blue light scanners for castings for full shape and size inspection and analysis, issuing a complete measurement and inspection report, can improve the quality of castings, optimize the high-pressure casting process." ”
Metallographic detection, focusing on detail "under the microscope"
"Metallographic testing is the same as determining whether a person's body is deficient in calcium and detecting bone density." Zhang Minhong said that the tungsten filament scanning electron microscope in the laboratory can use the electrons in the near surface area of the sample to generate images, and the inspectors can confirm whether the parts are qualified through the analysis of the morphological tissue observation of the material, the real-time micro-region composition of the material, the quantitative and qualitative components of the elements, etc.
Industrial CT, intrinsic quality "clear"
A variety of castings, injection molded parts and welded parts on the car, they are important in function and complex in structure, if there is a large defect, it will cause seal leakage, fracture and other issues, once the parts break and even affect the driving safety.
"In the earliest days, we used the method of 'dissecting' parts to check for internal quality problems." Zhang Minhong introduced that "anatomy" is the most traditional control method, cutting and polishing parts and then cutting cross-section optical observation. "A part that takes at least a week to complete the inspection is not only inefficient, but also damages the part. The industrial CT can complete the inspection of a part in only 6 or 7 hours, and can basically achieve zero defects. ”
Source: Shanghai Jiading