In order to solve the problem of the leakage of the flat tube of the all-aluminum low-temperature water tank in the thermal shock test, this article proposes 3 design adjustments, namely, widening the flat tube, changing the O-type collector tube and adding the spacer plate. Finite element analysis software Abaqus is used on the original design scheme and all-aluminum low-temperature water tank under 3 kinds of adjustment scheme for Finite Element Analysis (FEA) analysis, to get the maximum local stress of the flat tube at the leakage area and the maximum plastic strain and its distribution. Thermal shock bench tests are conducted using thermal shock life and the number and location of flat tube leaks as indicators. The results show that the thermal shock life is inversely proportional to the maximum local stress and plastic strain. The location of the leaking flat pipe of the test piece is consistent with the local stress and plastic strain distribution pattern, and the FEA simulation analysis is in good agreement with the test verification. Therefore, in order to extend the thermal shock life of the all-aluminum low temperature water tank, the program sequence is optimized as follows: use of O-type collector tubes, use of narrow flat tubes and use of double bulkheads.

To address the issue of low efficiency and great subjective influence while the laborer using the oilstone to polish the surface defects of Body-In-White（BIW） parts, this paper proposes a virtual oilstone detection method, and elaborates a data 3D system based on a high-precision 3D scanner data acquisition and automatically analyzes the algorithm and steps of surface defects on automotive panels and BIW. Simulation experiments and online detection experiments of virtual production lines are used to verify the method. The results show that this method can detect BIW surface defects stably and improve the efficiency and accuracy of surface quality detection on the automotive production line.

This paper focuses on the research, development, application, industrial layout and future trends of hot-formed dual-phase steel ring technology in automotive manufacturing. Initially, the paper provides an overview of the current status of key technologies related to hot-formed dual-phase steel rings, covering material selection and development, application of laser welding technology and optimization of stamping processes. The paper subsequently analyzes the industrial layout of hot-formed dual-phase steel rings, and emphasize the importance of core technological systems in the industrialization process. Finally, the future development direction of this technology is prospected, highlighting the advancements in high performance, lightweight, environmentally friendly and intelligent manufacturing.

In order to maximize the efficiency of gear oil and improve the transportation efficiency and economic benefits of users, an on-line monitoring technology of commercial vehicle transmission and drive train oils is developed to monitor the status parameters of gear oil in real time to change oil according to its quality. The test results show that there is a strong linear relationship between dynamic viscosity and kinematic viscosity of gear oil at different temperatures, and dynamic viscosity can replace kinematic viscosity during viscosity calculation. The variation of dielectric constant with temperature, water content, Fe content and acid value content is obvious, which verifies the feasibility of using dielectric constant as a comprehensive evaluation index of gear oil quality, and provides the experimental research basis for multi-parameter online monitoring of gear oil.

In this research, DC56D+ZM steel plate and DC56D+Z steel plate with coating thickness of 0.7 mm are taken as the research objects. The feasibility and mechanism of Zn-Al-Mg coated steel plate to solve stamping cracking are verified by using friction testing machine for sheet metal forming and stretching ribs, sheet comprehensive forming testing machine, scanning electron microscope, and MTS nanoindentation testing machine. The results show that the surface friction coefficient of the Zn-Al-Mg coating is 25% lower than that of the pure zinc coating. The forming limit performance of Zn-Al-Mg coated steel plates is better than that of pure zinc coated steel plates. Due to the finer grain size and higher hardness of the Zn-Al-Mg coating, the coating has a lower and more stable surface friction coefficient, which can significantly improve the forming performance of the steel plate and effectively improve the stamping cracking problem of automobile parts.

In order to improve exterior color quality control and management effect, the management methods of quality control for vehicle exterior color before and after mass production are summarized. Based on the practices, the method combined with color characteristics analysis is proposed. The key characteristic data are analyzed and control standards are established, which aims to improve the recognition efficiency of new vehicle exterior color quality and prevent the occurrence of batch color difference accident.

This study first compared the material properties and costs to determine the use of 45% by mass glass fiber (GF) reinforced nylon (PA). Based on the envelope, electrical performance, and insulation requirements given by the battery system,the structural design scheme of the integrated insulation structure battery housing has been determined. CAE analysis was conducted on this housing with integrated insulation structure. Equal proportion samples of the composite housing were manufactured using LFT-D technology and the insulation structure was integrated. Corresponding CFD analysis and insulation performance testing were carried out; Simulation analysis and sample testing have proven that the mechanical and insulation properties of this housing meet the design specifications, and compared to aluminum alloy housing, the housing also has the advantages of lightweight and low cost.

This paper introduces system composition, basic measurement principle and system control principle of the in-line measurement system used in BBAC body shop flexible production line, and defines the commissioning requirements for system accuracy guarantee to realize the calibration and compensation of dimensional measurement values. The use of the visual management system IQVIS further assists the body shop to quickly and efficiently analyze the dimensional accuracy of the body in white and predict the changing trend. By setting the out-of-tolerance alarm function, the intelligent management and quality control of the three-level tolerance of the body dimension can be realized, which can significantly reduce the impact of defective body on the subsequent processes.

Microstructured materials are increasingly favored due to their excellent performance. This paper introduces the concepts, principles and configurations of microstructured materials, it lists common types of microstructured materials, including porous metals, porous ceramics, foamed plastics, sandwich materials, etc., analyzes their applications in automotive safety, NVH and thermal management, describes and prospects the development concept of material-structure-function integrated product.

Based on the existing wet spray booth scrubber system in the domestic automotive manufacturing industry, this study analyzes the wet eliminator to dry carton system proposal, modifies the exit structure and develops the targeted solutions according to different building height,spray booth width, layout and surroundings. At the same time, simulation software is used to simulate and optimize the field flow, in order to shorten modification cycle, reduce the investment cost and optimize the equipment.