In order to optimize the off-line running, performance of line modification and transfer efficiency of Semi-knocked Down(SKD) vehicle bodies, this paper introduces the off-line, transshipment and assembly scheme of a domestic SKD vehicle for export. Taking a certain model as an example, the paper discusses the scheme and implementation method of how to use the fork transplanting machine and Radio Frequency Identification(RFID) identification with Manufacturing Execution System(MES) system to transfer the body of SKD export vehicle from domestic OEM production line to another Knocked Down(KD) workshop for assembly, and proposes corresponding solutions for the beat issue and empty skid reflux.

To improve the rationality of automotive spray design, spraying simulation technology is introduced to dynamically analyze the commissioning process of spraying robots on the basis of traditional spraying technology, and the paint film thickness effect is evaluated visually for the spraying path and spraying parameters. The results show that the matching rate between simulation calculation of painting film thickness and painting workshop reaches 84%, the homogeneity of painting film thickness is improved by 15%. In addition, the wastage of paint is reduced, paint cost is reduced by 5%, and varnish cost is reduced by 11%.

To address the issues of long construction cycles and outdated, complicated solutions in traditional ANDON information display systems, this paper proposes a design approach that emphasizes lightweightness, low-code development, ease of operation, and rapid deployment. Starting from these principles, this paper outlines the functional requirements and presents a design scheme for information display, covering both hardware and software components.Based on this scheme, an integrated information display system based on Android industrial hosts is designed. This system incorporates features such as remote management and control of information boards, real-time data collection and display, design and management of board display modes, data resource management, notification delivery, and broadcast control. These features are achieved through pre-installed apps on the hosts, drag-and-drop interface development, encapsulation of dedicated functions, low-code design, and remote deployment monitoring.

With the aluminum bracket of a new energy vehicle power battery as the research object, the level set method is employed to perform topological optimization on the power battery bracket. During the optimization process, factors such as structural stiffness, strength, fatigue, and dynamic safety are comprehensively considered. The optimization results are interpreted and the structure is reshaped to obtain a new structure that meets the requirements. The reshaped structure undergoes sensitivity analysis to identify sections requiring optimization. Through topology optimization, a reasonable cross-sectional shape is obtained, and the optimized structure is verified to ensure performance enhancement. Upon comparison, the optimized power battery bracket exhibits a 5.9 Hz increase in first-order modal compared to the original structure, with an overall stiffness improvement of 18.2%. The results for stiffness, strength, and random vibration are superior to the original structure. Fatigue analysis indicates that the damage to the new structure is less than 1, indicating its superiority over the original structure. Additionally, the weight of the optimized battery bracket is reduced from 209 kg to 180 kg, representing a weight reduction ratio of 13.8%.

The inner-dash sound insulation pad is an important part of the automobile firewall assembly. This paper studies the influence of different sound insulation pad materials, coverage rate, thickness distribution of soft layer and installation process characteristics of accessories on the sound insulation performance of the firewall assembly. The sound insulation performance of the firewall assembly of a vehicle model is optimized and improved through selecting appropriate material composition and soft layer thickness, improving the coverage rate of the sound insulation pad, and reducing the leakage amount.

Through-type tail lamp of a vehicle type cracks and fails during road test and it is confirmed by analysis of the cracking position that the failure is a kind of interface fatigue cracking. To address this issue, the paper confirms that mismatch between thermal expansion coefficient of Heterotropic material and mechanical properties is the cause of failure cracking. Stress distribution of lampshade is calculated by CAE software combined with sun exposure test, which shows that the stress distribution location is consistent with physical lampshade cracking. In combination of the evaluation of stress result by means of S-N curve, it rationally explains the seasonal pattern of cracking. This method is used to evaluate through-type tail lamp with different materials, colors and structures, the results shows that the highest risk of cracking appears in through-type tail lamp made from black styrene, ASA and transparent Polymethyl Methacrylate (PMMA), which is consistent with the law of after-sales statistics data.

Based on the experience of commissioning automated assembly technology for multiple models in a front-wheel drive vehicle project, the paper summarizes the general commissioning processes and methods related to Best-fit technology, its input-output advantages, and quality status evaluation. This paper also emphatically introduces the practical application of this technology in the production of new vehicle models, providing forward-thinking insights and standardized approaches for BIW panel parts of new projects to ensure assembly dimensions.

In the lithium-ion battery ternary anode materials, trace elements affect the battery performance directly, in this study, an analytical method for simultaneous determination of 19 trace elements including Nb, B, Zr, Sr, Ta, Ti, Y, La, Ga, Cu, Fe, K, Mg, P, Na, Al, Cr, Mo and Zn in ternary anode materials of lithium ion batteries is established by inductively coupled plasma emission spectrometry. The influence of different solvents on the determination of trace elements in ternary anode materials is investigated, and the best sample solvent is determined. The results show that the method is simple, rapid, and has good repeatability and reliability. The relative standard deviation of each element is 0.58%~3.56%, and the recovery is 91.81%~104.91%, which can fully meet the needs of trace element content analysis of ternary cathode materials.

The method of laser offset is used to simulate the deviation of edge trimming precision of aluminum alloy door parts. Taking the laser focus on the lap joint edge as a reference, the effect of the different offset distance, namely trimming deviation of parts on weld forming and properties is investigated. The results show that the weld seam surface forming and cross section morphology change with different trimming deviations. In term of weld seam forming, when the trimming deviation of the part gradually increases from -1.0 mm to +1.0 mm (the direction in which the trimming of the part is away from the laser spot and exposes the lower plate of the lap joint to the laser is defined as negative, and the opposite direction is defined as positive), the surface of the weld seam gradually becomes full. In term of weld seam mechanical properties, when the trimming deviation of the part is within the range of -0.5 mm to +1.0 mm, the change of the trimming deviation has little effect on the mechanical properties of the weld seam, and when the trimming deviation is -1.0 mm, the tensile strength of the weld joint is significantly reduced. Therefore, in order to ensure the forming and mechanical properties of the welding seam on the aluminum alloy door, the trimming deviation of parts should be ensured in the range of -0.5 mm to +1.0 mm during the trial production process.

Aiming to three cases of premature failure of steel wheels during bending fatigue and radial fatigue tests, this paper analyzes the influence of materials processing technology on wheel fatigue performance using fracture scanning, energy spectrum surface scanning, microstructure, and low magnification experiments. The shows that the aggregation of small-sized inclusions in materials, improper parameters in the synthesis welding of wheel rims and spokes, and incorrect parameters for flash welding of wheel rims all lead to the weakening of wheel fatigue performance.