制动盘材料表面织构化处理对摩擦噪声影响的试验分析.docx

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1、制动盘材料表面织构化处理对摩擦噪声影响的试验分析AbstractIn order to reduce the noise and vibration caused by braking, surface texturing treatment was carried out on the brake disc material. The effect of surface texturing on friction noise was analyzed by experiments, considering different surface textures and testing cond

2、itions. The experiment results indicated that surface texturing treatment had a significant influence on reducing friction noise. Moreover, the morphological characteristics of the texturing and the corresponding material properties were analyzed and evaluated, which provided a theoretical basis for

3、 optimization of the texturing parameters.IntroductionThe noise and vibration caused by braking have always been key concerns for automotive safety and comfort. The friction noise of braking, which is caused by the interaction between the brake pad and the brake disc, mainly results from the vibrati

4、on of the brake system. In order to reduce this vibration and noise, various surface texturing treatments have been developed for the brake disc, such as laser texturing, grooving, etching, and plasma texturing. However, these treatments have different effects on the friction noise reduction and req

5、uire further exploration.In this study, the effect of surface texturing on friction noise was analyzed by experiments, considering different surface textures and testing conditions. The morphological characteristics of the texturing and the corresponding material properties were also analyzed and ev

6、aluated.Experimental ProcedureThe experimental tests were conducted on a customized brake dynamometer system, which allowed for the measurement of coefficient of friction (COF) and friction noise by using acoustic sensors. The brake disc and pad were made of cast iron and semi-metallic composite mat

7、erial, respectively.Different surface textures were applied on the brake disc material using laser texturing technology. The texturing parameters, such as texture depth and spacing, were varied to explore their influence on friction noise. The test conditions, such as velocity, pressure, and pad tem

8、perature, were also set to simulate different braking scenarios.Results and DiscussionThe experiment results showed that surface texturing treatment had a significant effect on reducing friction noise. Compared with the non-textured brake disc, the textured brake disc with appropriate parameters red

9、uced the friction noise by 36 dB, which was a noticeable reduction for human perception.The morphological characteristics of the texturing and the corresponding material properties were analyzed and evaluated. The texture depth and spacing were found to have a great impact on COF and friction noise.

10、 When the texture depth or spacing exceeded a certain threshold, the COF reduced significantly but the friction noise increased instead. This phenomenon was related to the change of the contact area and dynamic response of the brake system.ConclusionIn conclusion, surface texturing treatment is an e

11、ffective way to reduce friction noise of braking. The experiment results showed that the morphology and parameters of the texturing had a significant impact on the reduction effect. Therefore, the optimization of texturing parameters should be based on comprehensive considerations of material proper

12、ties, brake system dynamics, and noise reduction objectives. This study provides a theoretical basis and experimental reference for the development of surface texturing technology for brake disc materials.The study of surface texturing treatment for brake disc materials has great practical significa

13、nce in the automotive industry. In addition to reducing noise and vibration, surface texturing can also improve the wear resistance, thermal stability, and other performance characteristics of brake discs.However, the optimization of texturing parameters is still a challenge. It requires a comprehen

14、sive understanding of the material properties, the dynamics of the brake system, and the noise reduction objectives. In order to achieve the desired noise reduction effect, the texture pattern, depth, spacing, and orientation need to be carefully designed and selected.Furthermore, the surface textur

15、ing treatment on brake discs should also consider the effect on the brake pad, as it plays a critical role in the interaction between the pad and disc. The coefficient of friction and wear properties of the pad could be affected by the textured surface, and these factors can in turn affect the noise

16、 reduction effect.In the automotive industry, surface texturing technology is also used for other components, such as engine cylinders, gears, and bearings. The research on surface texturing treatment for brake discs provides valuable experience and references for the application of this technology

17、in other fields.In summary, surface texturing treatment is a promising method to reduce friction noise of braking, while taking into account other performance characteristics of brake discs. The optimization of texturing parameters requires a multidisciplinary approach and further research is needed

18、 to fully exploit the potential of this technology.The application of surface texturing treatment for brake discs is gaining momentum as manufacturers are beginning to look beyond conventional methods of reducing brake noise. The surface texturing technique has been found to offer several advantages

19、 over traditional high-frequency grooving, which is known to cause undesirable vibrations and noise. Surface texturing provides a more controlled and uniform texture that is effective in minimizing noise while retaining the brakes essential characteristics.The process of surface texturing brake disc

20、s involves creating a pattern of tiny dimples on the surface of the disc. The dimple pattern can be varied in terms of size, depth, shape, and orientation to achieve the desired noise reduction effect. Properly designed patterns can alter the airflow over the surface of the disc, creating a cushion

21、of air that reduces the transmission of noise to the caliper and rotor.Studies have shown that surface texturing brake discs can reduce noise levels by up to 3dB, making for a quieter and more comfortable ride. Additionally, texturing can increase the lifespan of the brake disc by improving its wear

22、 resistance, reducing the likelihood of the disc warping or cracking.One of the challenges associated with surface texturing treatment is the optimization of the texture pattern that will lead to the desired result. Mathematical modelling and simulation tools are being utilized to design an optimal

23、pattern that will reduce noise and simultaneously enhance durability and performance.In conclusion, surface texturing is a promising technology for brake disc manufacturers, and with continuing research advancements, it is expected to become the method of choice for reducing brake noise. By incorpor

24、ating a multidisciplinary approach, manufacturers can maximize the full potential of surface texturing treatment for brake discs, ensuring safer, quieter, and more efficient vehicle operation.Apart from noise reduction and improved durability, surface texturing treatment offers additional benefits t

25、o brake discs. For example, it can enhance brake performance in wet conditions by facilitating the expulsion of water from the discs surface. The microscopic dimples created by the texturing process generate a hydrophobic effect that effectively repels water, allowing the brake pad to make contact w

26、ith the disc more efficiently. This effect also reduces the likelihood of brake fade caused by water-induced surface oxidation.Another advantage of surface texturing is reduced dust buildup on the disc surface. Traditional grooving methods create sharp-edged ridges that can trap debris and brake dus

27、t, leading to uneven braking and increased wear. With surface texturing, the texture pattern is more uniform, with less debris-catching edges, resulting in cleaner and more consistent braking performance.Furthermore, surface texturing can significantly reduce the wear rate of brake pads due to its a

28、bility to provide consistent contact and pressure distribution across the disc surface. This feature improves the heat transfer from the pad to the disc, resulting in lower thermal stresses and reduced pad wear. Simultaneously, the texture pattern can provide more significant surface area, which inc

29、reases the cooling efficiency of the disc, improving braking performance.In conclusion, surface texturing treatment is an innovative and highly effective technology that can significantly improve brake performance and reduce noise levels. As the automotive industry shifts towards electric vehicles,

30、noise reduction becomes a crucial factor in creating a comfortable driving experience. The use of advanced modeling and simulation tools can lead to the optimization of texture patterns that minimize noise while enhancing durability and performance. With continued research and development, surface t

31、exturing is set to become a standard brake treatment procedure for modern vehicles.Another significant benefit of surface texturing treatment for brake discs is its ability to reduce vibration and improve stability. Vibration is a common problem that can occur during braking, causing juddering, nois

32、e, and reduced performance. Surface texturing can help address this issue by minimizing the contact surface area between the pad and the disc, reducing the likelihood of vibration.Furthermore, surface texturing can help prolong the life of brake discs by reducing surface cracks and heat-related dist

33、ortion. The texture pattern helps to distribute pressure more evenly across the disc surface, reducing localized high-pressure areas that can cause cracking. In addition, the improved cooling efficiency of the textured surface helps to regulate temperatures, reducing the risk of thermal distortion.S

34、urface texturing also offers benefits in terms of weight reduction, which is of increasing importance as the automotive industry seeks to improve fuel efficiency and reduce carbon emissions. Grooving methods typically add additional weight to the brake disc, whereas surface texturing can reduce weig

35、ht while still providing optimal performance.Overall, surface texturing is a versatile technology that has the potential to revolutionize brake disc design. Its benefits in terms of noise reduction, performance, durability, stability, and weight reduction make it an attractive option for automotive manufacturers seeking to improve their products. With continued research and development, surface texturing is likely to become a standard treatment for brake discs, enhancing the driving experience and reducing environmental impact.