With the development of the times and technology, most of the current mainstream new energy vehicle models have made great efforts in intelligent technologies, such as large-screen human-computer interaction systems, holographic 3D technologies, and ADAS (Advanced Driver Assistance Systems). As competition in the automotive industry becomes increasingly fierce, enterprises need to pay more attention to how to use new technical means to improve product precision and quality in production, inspection and other links to enhance product competitiveness. The traditional inspection method is to use coordinate measuring machines, which involve complex programming processes and slow measuring speeds, consuming a lot of inspection time. The adoption of 3D laser scanning technology can quickly obtain comprehensive 3D data of auto parts, making the product development and quality control processes of auto parts more accurate and efficient. 1. Current Situation of Measurement and Inspection in the Automotive Industry Due to the need for new cars to be quickly launched into the market, the design and manufacturing links are under tremendous pressure. In the automotive design link, it is difficult to break through the traditional design ideas to make major changes in the streamline or ergonomic adaptability of the exterior and interior. Some good design ideas and elements cannot be quickly integrated with the original models. In the inspection and measurement links of production and manufacturing, in links such as mold manufacturing, parts stamping, vehicle welding, and painting, traditional contact measurement methods are difficult to comprehensively measure sheet metal parts with special-shaped curved surfaces and complex contours. They are inefficient and cannot realize full-size inspection, thus failing to carry out effective inspection and evaluation, which ultimately affects the quality of the whole vehicle and the market brand reputation. 2. 3D Optical Measurement Solutions Compared with traditional measurement methods, 3D inspection has the following advantages: Non-contact measurement: The XTOM 3D scanner adopts non-contact measurement, which can accurately and quickly obtain 3D data of the surface of the sheet metal part. Compared with contact measurement, it is more flexible, can collect data from multiple angles, and obtain complete data of complex sheet metal parts. Full-field scanning collection: Compared with the coordinate measuring machine's point-by-point measurement, optical scanning can collect full-size point cloud data of sheet metal parts, which can better measure the dimensional deviation of curved sheet metal parts. Portability and flexibility: It can be moved flexibly, is easy to operate, can change angles and distances at any time to scan the measured object, and is convenient to carry for on-site measurement. 3. Dimensional Deviation Inspection of Sheet Metal Parts Sheet metal parts have structures such as grooves, curved surfaces, and thin walls. After scanning, the data is used for full-size deviation inspection to verify whether the sheet metal parts are qualified and whether there is dimensional deformation. Using the Xintuo 3D XTOM 3D scanner, the scanning speed is fast and the precision is high. Complete data can be obtained by scanning from multiple angles. The scanner is equipped with post-processing software, which saves a lot of time for data processing. It can export files in Stl format, and the scanned data can be compared with the CAD digital model to output a deviation color map, realizing full-size inspection of sheet metal parts. The Xintuo 3D XTOM 3D scanner can perform full-size color map analysis of sheet metal parts, inspect distance, aperture, position degree, parallelism, flatness, etc., and overall control the deformation and deviation of sheet metal parts. At the same time, the scanning results can be fed back to the mold to facilitate the adjustment of the mold, so as to find the optimal processing method that saves the most raw materials and time, and reduce raw material and time costs. 4. Dimensional Inspection of Automobile Seat Sheet Metal Parts A high-tech auto parts manufacturer, in the new seat design and introduction stage, conducts dimensional measurement of sheet metal parts, scans the sheet metal parts and their thickness, and later uses the scanned data for reverse engineering and full-size deviation inspection to find the causes of precision defects and formulate countermeasures, so as to adjust the process in time and meet the mass production quality requirements. The XTOM 3D scanner is used to perform 3D scanning of sheet metal parts with fast speed and high precision. Before scanning, engineers simply place markers on the customer's sheet metal parts and then start scanning. Real-time visible scanning data enables quick and comprehensive scanning of sheet metal parts. Moreover, the scanner is equipped with post-processing software, which saves a lot of time for later data processing. It can export files in stl format, which can be opened in multiple 3D software. Import the scanned 3D data into reverse design software, and convert the point cloud data of automobile sheet metal parts into triangular mesh surface data. Import the scanned data into design software, align the scanned data with the CAD digital model, calculate the deviation between the scanned data and the CAD digital model through the 3D comparison function, and generate an inspection report. If some parts have excessive errors, the processing process can be adjusted in time according to the deviation values. Automobile sheet metal parts have very high requirements on the precision of details such as hole positions and the entire outer contour. Only parts that have undergone strict measurement and meet the given tolerances can be put into mass production, and then directly delivered to customers or arranged for further processing and assembly. Based on the characteristics of non-contact, high precision, full size, intuition and comprehensiveness, 3D scanners have gradually become the mainstream inspection tools for automobile sheet metal parts. The Xintuo 3D XTOM 3D scanner is suitable for dimensional deviation inspection of various automobile sheet metal parts, and displays the numerical deviation results in the form of color maps, helping users optimize the processing process and improve the production quality of sheet metal parts. Source: Xintuo 3D, Nuosidun Measurement Technology