Precision Engineering-Journal of the International Societies for Precision Engineering and Nanotechnology最新文献

Stiffness model for pneumatic spring with air-diaphragm coupling effect 具有空气-膜片耦合效应的气动弹簧刚度模型

IF 3.5 2区工程技术 Q2 ENGINEERING, MANUFACTURING

Precision Engineering-Journal of the International Societies for Precision Engineering and Nanotechnology

Pub Date : 2024-11-17 DOI: 10.1016/j.precisioneng.2024.11.008

Yumei Bai , Rongxing Liu , Jiulin Wu , Jixing Che , Mingkai Wu , Rui Zhou , Xuedong Chen , Lizhan Zeng , Wei Jiang

An accurate pneumatic spring stiffness model is essential for achieving subhertz, quasi-zero stiffness vibration isolation in optical experiments, precision measurements, and semiconductor manufacturing involving heavy equipment. Conventional stiffness models for pneumatic springs with diaphragms often neglect the effect of the elastic diaphragm, making it difficult to accurately characterise pneumatic spring stiffness. This paper presents an innovative pneumatic spring stiffness model that incorporates the air-diaphragm coupling effect—a phenomenon in which the air and diaphragm interact synergistically to affect stiffness. The inclusion of this coupling effect alters the effective area and volume of the pneumatic spring, two critical parameters influencing stiffness. Detailed mechanical and geometrical derivations are provided to establish an accurate stiffness model. A modification coefficient is introduced to quantify the air-diaphragm coupling effect on stiffness, and various factors influencing this coefficient, as well as their impact on stiffness, are examined. An experiment was conducted to validate the proposed model, showing a relative error of less than 1.65 % between the experimental and theoretical results. Considering the air-diaphragm coupling effect, the absolute error approximation was reduced by an order of magnitude, and the relative stiffness decreased by 11.05 % and 8.26 % in Experiments 1 and 2, respectively. Owing to its high precision, the proposed model provides theoretical guidance for the engineering design of pneumatic springs and facilitates the accurate matching of quasi-zero stiffness vibration isolation systems for heavy equipment in ultra-precision applications.

准确的气动弹簧刚度模型对于在光学实验、精密测量和涉及重型设备的半导体制造中实现亚赫兹、准零刚度振动隔离至关重要。带膜片的气动弹簧的传统刚度模型通常会忽略弹性膜片的影响，因此难以准确表征气动弹簧的刚度。本文提出了一种创新的气动弹簧刚度模型，其中包含空气-膜片耦合效应--空气和膜片协同作用影响刚度的现象。这种耦合效应改变了气动弹簧的有效面积和体积，而这是影响刚度的两个关键参数。为建立精确的刚度模型，提供了详细的机械和几何推导。引入了一个修正系数来量化空气-膜片耦合效应对刚度的影响，并研究了影响该系数的各种因素及其对刚度的影响。实验验证了所提出的模型，结果表明实验结果与理论结果之间的相对误差小于 1.65%。考虑到空气-隔膜耦合效应，绝对误差近似值降低了一个数量级，实验 1 和实验 2 中的相对刚度分别降低了 11.05 % 和 8.26 %。该模型精度高，为气动弹簧的工程设计提供了理论指导，有助于为超精密应用中的重型设备精确匹配准零刚度隔振系统。

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引用次数: 0

Distance deviation sensitivity on null test of convex hyperboloid mirrors with large relative aperture 具有大相对孔径的凸双曲面反射镜无效测试的距离偏差灵敏度

IF 3.5 2区工程技术 Q2 ENGINEERING, MANUFACTURING

Precision Engineering-Journal of the International Societies for Precision Engineering and Nanotechnology

Pub Date : 2024-11-17 DOI: 10.1016/j.precisioneng.2024.11.006

Shijie Li , Jiani Liu , Bingcai Liu , Ailing Tian , Sibo Niu , Lumin Zhao , Haitao Liu , Chunyan Shi , Jin Zhang , Haifeng Liang , Changlong Cai

In the shape measurement of convex hyperboloid mirrors with large relative apertures, alignment deviations can significantly affect the accuracy of null test results owing to their sensitivity, resulting in inaccurate results. This paper introduces autocollimation and compensation methods. Subsequently, a shape detection experiment of a large relative aperture convex hyperboloid mirror with a diameter of 15 mm was conducted using the aforementioned methods. Further, a detailed simulation analysis was performed to address the inconsistencies between the two test results. The results suggested that the Hindle sphere method was highly sensitive to distance deviation. Furthermore, the distances in the optical path exerted a complementary effect, which easily obscured the true surface shape of the measured part. The computer-generated hologram (CGH) method could accurately determine the true surface shape deviation based on the alignment judgment provided by the aligned CGH part. These studies provide scientific guidance for more accurately obtaining the true surface shape error of the hyperboloid mirror under test, and have significant engineering application value.

在对具有较大相对孔径的凸面双曲面反射镜进行形状测量时，对准偏差会由于其灵敏度而严重影响无效测试结果的准确性，导致结果不准确。本文介绍了自动对准和补偿方法。随后，利用上述方法对直径为 15 毫米的大相对孔径凸双曲面反射镜进行了形状检测实验。此外，针对两次检测结果不一致的问题，还进行了详细的模拟分析。结果表明，Hindle 球方法对距离偏差非常敏感。此外，光路中的距离会产生互补效应，很容易掩盖被测零件的真实表面形状。计算机生成全息图（CGH）方法可以根据对准的 CGH 零件提供的对准判断准确确定真实的表面形状偏差。这些研究为更准确地获取被测双曲面镜的真实表面形状误差提供了科学指导，具有重要的工程应用价值。

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引用次数: 0

Rapid non-contact measurement of distance between two pins of flexspline in harmonic reducers based on standard/actual parts comparison 基于标准件/实际件对比，非接触式快速测量谐波减速器中挠性花键两针之间的距离

IF 3.5 2区工程技术 Q2 ENGINEERING, MANUFACTURING

Precision Engineering-Journal of the International Societies for Precision Engineering and Nanotechnology

Pub Date : 2024-11-16 DOI: 10.1016/j.precisioneng.2024.11.007

Caitao Liu, YuGuo Cui, Dan Liang, Li Liu, JunQiang Lou

In order to achieve rapid and precise measurement of distance between two pins of flexspline in harmonic reducers, an rapid non-contact measurement strategy based on standard/actual parts comparison is proposed. Firstly, to eliminate the installation eccentricity error of flexspline fixture, a sine-quadrant eccentricity error elimination method is designed. The sinusoidal curve and quadrant of the measured fixture eccentricity error with respect to the fixture rotation angle is used to calculate the eccentric error components along x and y axes, which has the advantages of simplicity and rapidity. Secondly, a Gaussian-Harmonic Wavelet Filtering (GHWF) algorithm is proposed to filter out the noise in the measurement process, which can effectively suppress the Gibbs phenomenon in harmonic wavelet transformation and improve the signal-to-noise ratio. Finally, an experimental platform including baseplate, turntable, flexspline, moving platform and laser sensor is constructed, in order to verify the performances of error elimination, noise filtering and distance measuring. Experimental results show that the measurement error of the proposed strategy is less than 7 μm, which is consistent with the accuracy obtained by the commercial high-precision gear measuring instrument. The average measurement time is about 29.6 s, much less than the 5 min of the commercial instrument, showing great application potential for the efficient distance measurement of gears and flexsplines.

为了实现谐波减速器挠性规两销间距的快速精确测量，提出了一种基于标准件/实际件比对的快速非接触测量策略。首先，为了消除挠性规夹具的安装偏心误差，设计了一种正弦象限偏心误差消除方法。利用测量到的夹具偏心误差与夹具旋转角度的正弦曲线和象限来计算沿 x 轴和 y 轴的偏心误差分量，具有简单、快速的优点。其次，提出了一种高斯-谐波小波滤波（GHWF）算法来滤除测量过程中的噪声，该算法能有效抑制谐波小波变换中的吉布斯现象，提高信噪比。最后，为了验证误差消除、噪声过滤和距离测量的性能，构建了包括基板、转盘、挠性板、移动平台和激光传感器在内的实验平台。实验结果表明，所提策略的测量误差小于 7 μm，与商用高精度齿轮测量仪获得的精度一致。平均测量时间约为 29.6 秒，远少于商用仪器的 5 分钟，显示出在高效测量齿轮和挠性曲线距离方面的巨大应用潜力。

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引用次数: 0

Based on domain adversarial neural network with multiple loss collaborative optimization for milling tool wear state monitoring under different machining conditions 基于域对抗神经网络的多损失协同优化，用于监测不同加工条件下的铣刀磨损状态

IF 3.5 2区工程技术 Q2 ENGINEERING, MANUFACTURING

Precision Engineering-Journal of the International Societies for Precision Engineering and Nanotechnology

Pub Date : 2024-11-14 DOI: 10.1016/j.precisioneng.2024.11.005

Qiang Liu , Jiaqi Liu , Xianli Liu , Jing Ma , Bowen Zhang

In machining, it is crucial to monitor the tool wear status in real time to guarantee the quality of the workpiece being machined. Tool wear monitoring technology mainly reflects the tool state through the physical signals generated during the machining. At present, the technology faces many challenges in practical applications. When facing different machining scenarios, the model is difficult to adapt to new machining scenarios. Therefore, this study proposes a method to monitoring the tool wear state under different machining conditions based on Domain Adversarial Neural Network with multiple loss collaborative optimization (MLCODANN). This method takes the domain adversarial neural network as the framework and uses a multiple loss collaborative optimization method to adjust the optimization direction of the loss. It avoids the problem of conflict between the domain alignment and the classification loss, improves the convergence of model loss. In addition, this study used ResNet18 as a feature extraction network to extract features of the cutting signal. Meanwhile, the horizontal and vertical convolutional kernels

1 \times k

and

k \times 1

are used instead of the convolutional kernel

k \times k

, which reduces model parameters and training time the and improves the model performance. Finally, through comparative experiments, it is proved that MLCODANN model has high accuracy in recognizing tool wear state under different machining conditions.

在机械加工中，实时监控刀具磨损状态对保证加工工件的质量至关重要。刀具磨损监测技术主要通过加工过程中产生的物理信号来反映刀具状态。目前，该技术在实际应用中面临诸多挑战。面对不同的加工场景，该模型很难适应新的加工场景。因此，本研究提出了一种基于域对抗神经网络与多重损失协同优化（MLCODANN）的方法来监测不同加工条件下的刀具磨损状态。该方法以领域对抗神经网络为框架，采用多重损失协同优化方法调整损失的优化方向。它避免了领域排列与分类损失之间的冲突问题，提高了模型损失的收敛性。此外，本研究使用 ResNet18 作为特征提取网络，提取切割信号的特征。同时，采用水平卷积核 1×k 和垂直卷积核 k×1 代替卷积核 k×k，减少了模型参数和训练时间，提高了模型性能。最后，通过对比实验证明，MLCODANN 模型对不同加工条件下刀具磨损状态的识别具有较高的精度。

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引用次数: 0

Fabrication of angle-gradient echelle grating on metallic glass using shaped vibration cutting with time-varying trajectory 利用具有时变轨迹的异形振动切割在金属玻璃上制作角梯度梯度光栅

IF 3.5 2区工程技术 Q2 ENGINEERING, MANUFACTURING

Precision Engineering-Journal of the International Societies for Precision Engineering and Nanotechnology

Pub Date : 2024-11-12 DOI: 10.1016/j.precisioneng.2024.11.002

Wei Dai , Pingfa Feng , Zhimeng Chen , Feng Feng , Mengying Luan , Jianjian Wang

In order to solve the problem of narrow band coverage of traditional infrared gratings, a new type of diffraction grating is invented and named as angle-gradient echelle grating. The blaze angle of the grating gradually changes along the direction of the grating grooves, which can be regarded as etching countless sub-gratings with different blaze angles on a grating, breaking the limitation of the number of blaze angles of traditional gratings. In addition, in order to solve the processing problem of angle-gradient echelle grating, a new processing method, shaped vibration cutting (SVC) with a time-varying trajectory is developed. By exploring the influence of different processing parameters on the grating processing results, a suitable processing plan was proposed. Eventually, angle-gradient echelle grating with blaze angles varying from 30° to 55° and surface roughness of as low as 20 nm was fabricated on metallic glass, a material that is difficult to machine.

为了解决传统红外光栅覆盖波段窄的问题，人们发明了一种新型衍射光栅，并将其命名为角梯度埃歇尔光栅。这种光栅的焰角沿着光栅槽的方向逐渐变化，可以说是在一个光栅上刻蚀了无数个不同焰角的子光栅，打破了传统光栅焰角数量的限制。此外，为了解决角梯度榭层光栅的加工问题，还开发了一种新的加工方法--具有时变轨迹的异形振动切割（SVC）。通过探讨不同加工参数对光栅加工结果的影响，提出了合适的加工方案。最终，在金属玻璃这种难以加工的材料上制造出了炽热角从 30°到 55°不等、表面粗糙度低至 20 nm 的角梯度埃歇尔光栅。

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引用次数: 0

Kinematics modeling and trajectory optimization for precision grinding of variable-parameter helical grooves 可变参数螺旋槽精密磨削的运动学建模和轨迹优化

IF 3.5 2区工程技术 Q2 ENGINEERING, MANUFACTURING

Precision Engineering-Journal of the International Societies for Precision Engineering and Nanotechnology

Pub Date : 2024-11-10 DOI: 10.1016/j.precisioneng.2024.10.015

Yong Li , Guofu Ding , Zhihui Yang , Changjiu Xia , Zhe Liu , Lei Jiang

End mills with variable helix angles in a certain range can suppress the cutting vibration, and the change of the core radius can improve the cutting rigidity and realize the best match between the rigidity and the chip removal performance. However, the existing process cannot accurately realize the continuous variable helix angle along the cutting edge. Moreover, the change in helix angle and core radius increases the difficulty of calculating the grinding trajectory and makes it difficult to control the rake angle accurately, and that results in the performance of this end mill cannot be accurately guaranteed. Therefore, this paper proposed a kinematics modeling and trajectory optimization method for the precision grinding of variable-parameter helical grooves. Firstly, a general grinding kinematics model is established by geometric analysis. Secondly, with the rake angle, helix angle, and core radius as constraints, models are constructed to solve the location and direction parameters of the grinding wheel. Then, the calculation and optimization method of the grinding trajectory for variable-parameter helical grooves is developed. Finally, the experimental verification is carried out and the results show that the maximum rake angle error is 0.09°, the maximum helix angle error is 0.08°, and the maximum core radius error is 0.053 mm. It indicates the grinding kinematics model and the trajectory optimization are correct. This process can also be used to grind complex helical grooves on custom cutting tools such as drills and screw taps.

在一定范围内可变螺旋角的立铣刀可抑制切削振动，改变刀芯半径可提高切削刚性，实现刚性与排屑性能的最佳匹配。然而，现有工艺无法精确实现沿切削刃连续可变的螺旋角。而且，螺旋角和刀芯半径的变化增加了磨削轨迹的计算难度，使前角难以精确控制，导致该立铣刀的性能无法得到准确保证。因此，本文提出了变参数螺旋槽精密磨削的运动学建模和轨迹优化方法。首先，通过几何分析建立了一般磨削运动学模型。其次，以前角、螺旋角和铁芯半径为约束条件，建立模型求解砂轮的位置和方向参数。然后，建立了变参数螺旋槽磨削轨迹的计算和优化方法。最后，进行了实验验证，结果表明最大前角误差为 0.09°，最大螺旋角误差为 0.08°，最大砂芯半径误差为 0.053 mm。这表明磨削运动学模型和轨迹优化是正确的。该工艺还可用于磨削钻头和丝锥等定制刀具上的复杂螺旋槽。

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引用次数: 0

Review of ultrasonic vibration-assisted milling technology 超声波振动辅助铣削技术回顾

IF 3.5 2区工程技术 Q2 ENGINEERING, MANUFACTURING

Precision Engineering-Journal of the International Societies for Precision Engineering and Nanotechnology

Pub Date : 2024-11-09 DOI: 10.1016/j.precisioneng.2024.10.021

Ang Li , Xuewei Zhang , Jianbo Chen , Ting Shi , Lu Wen , Tianbiao Yu

Compared with the conventional milling technology, the ultrasonic vibration-assisted milling technology has better machining performance for hard-to-machine materials. With the progress of ultrasonic generators and ultrasonic transducers, the research of the ultrasonic-assisted milling technology has been developed rapidly. Correspondingly, new design requirements and theoretical concepts are proposed to meet the high-performance requirements of manufacturing complex structures with hard-to-machine materials. There are few comprehensive reviews about the ultrasonic vibration-assisted milling technology. Therefore, we present the first comprehensive review of the advantages, the basic principles, the historical research progress, the cutting tools, the workpiece material properties and the cutting characteristics of the ultrasonic vibration-assisted milling technology to lay a foundation for the related research. In addition, the shortcomings of the existing theories and the outlook for future research directions are also discussed.

与传统铣削技术相比，超声波振动辅助铣削技术对难加工材料具有更好的加工性能。随着超声波发生器和超声波换能器的进步，超声波辅助铣削技术的研究得到了快速发展。相应地，也提出了新的设计要求和理论概念，以满足难加工材料复杂结构的高性能加工要求。有关超声振动辅助铣削技术的全面综述很少。因此，我们首次对超声波振动辅助铣削技术的优点、基本原理、历史研究进展、切削工具、工件材料特性和切削特性进行了全面综述，为相关研究奠定基础。此外，还讨论了现有理论的不足之处以及对未来研究方向的展望。

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引用次数: 0

An integrated hot embossing and thermal reflow method for precision manufacture of plano-convex glass microlens arrays 用于精密制造平凸玻璃微透镜阵列的集成热压印和热回流方法

IF 3.5 2区工程技术 Q2 ENGINEERING, MANUFACTURING

Precision Engineering-Journal of the International Societies for Precision Engineering and Nanotechnology

Pub Date : 2024-11-04 DOI: 10.1016/j.precisioneng.2024.11.001

Gao Yang , Kang Yang , Jianzhi Li , Chi Fai Cheung , Feng Gong

Plano-convex glass microlens arrays (MLAs) have broad applications in imaging, sensing, illumination, and communication systems. This paper proposed a three-step method to precision manufacture of plano-convex glass MLAs, which involves fabrication of SiC microhole arrays (MHAs), hot embossing of glass micropillar arrays (MPAs) and thermal reflow of glass MLAs. The effects of embossing temperature, force, and time on the replication accuracy of glass MPAs are evaluated. Subsequently, the glass MPAs with decent replication accuracy were subjected to thermal reflow experiments for studying the effects of reflowing temperature and reflowing time on the geometric features of formed glass MLAs. It is found that the height and tip curvature of reflowed glass microlenses can be controlled by adjusting the reflowing temperature and time. The warpage amplitudes and mean birefringence of most reflowed glass substrates are less than 5 μm and 27 nm/cm, respectively. Furthermore, the reflowed glass microlens arrays shows a decent uniformity in an area with a diameter of ∼4 mm. Finally, the feasibility of the integrated hot embossing and thermal reflow method in producing glass nano-lens arrays is also demonstrated. As a result, the hybrid forming technology that combines hot embossing with thermal reflow not only avoids the difficulties of fabrication of MLA and NLA mold inserts, but also possesses the advantages of high efficiency and low cost, which is expected to be a promising mass production technology for glass micro/nano-lens arrays.

平凸玻璃微透镜阵列（MLA）在成像、传感、照明和通信系统中有着广泛的应用。本文提出了一种分三步精密制造平凸玻璃微透镜阵列的方法，包括制造碳化硅微孔阵列（MHA）、热压印玻璃微柱阵列（MPA）和热回流玻璃微透镜阵列。评估了压花温度、力度和时间对玻璃 MPA 复制精度的影响。随后，对复制精度良好的玻璃 MPA 进行了热回流实验，以研究回流温度和回流时间对成型玻璃 MLA 几何特征的影响。实验发现，回流玻璃微透镜的高度和尖端曲率可通过调节回流温度和时间来控制。大多数回流玻璃基板的翘曲幅度和平均双折射分别小于 5 μm 和 27 nm/cm。此外，回流玻璃微透镜阵列在直径为 4 毫米的区域内显示出良好的均匀性。最后，还证明了热压印和热回流焊集成方法在生产玻璃纳米透镜阵列方面的可行性。因此，热压凸与热回流相结合的混合成型技术不仅避免了 MLA 和 NLA 模具镶件制造的困难，而且具有高效率和低成本的优点，有望成为一种有前途的玻璃微/纳米透镜阵列批量生产技术。

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引用次数: 0

Design and testing of a two-axis surface encoder with a single Littrow configuration of a first-order diffraction beam 使用一阶衍射光束的单利特罗配置设计和测试双轴表面编码器

IF 3.5 2区工程技术 Q2 ENGINEERING, MANUFACTURING

Precision Engineering-Journal of the International Societies for Precision Engineering and Nanotechnology

Pub Date : 2024-10-31 DOI: 10.1016/j.precisioneng.2024.10.019

Yifan Hong, Ryo Sato, Hiraku Matsukuma, Wei Gao

A simple but effective optical design is proposed to expand the measurement range of a surface encoder in the out-of-plane Z-direction, which had been much shorter than that in the in-plane X-direction. A zeroth-order and a first-order diffraction beams generated at a transparent grating are projected onto a parallelly aligned scale grating. The reflected zeroth-order beam from the scale grating interferes with a beam from a reference plane mirror for the Z-directional measurement over an expanded range of 13 mm. A single Littrow configuration is established for the first-order diffraction beam to travel to and from the scale grating on the same path so that it can interfere with the reflected zeroth-order beam for the X-directional measurement regardless of the Z-position of the scale grating. A prototype sensor is constructed for demonstrating the effectiveness of the proposed optical design for expansion of Z-range. Uncertainty analysis on the measurement results is also conducted.

表面编码器在平面外 Z 方向的测量范围比在平面内 X 方向的测量范围短得多，本文提出了一种简单而有效的光学设计，以扩大表面编码器在平面外 Z 方向的测量范围。在透明光栅上产生的零阶和一阶衍射光束被投射到平行排列的刻度光栅上。来自刻度光栅的零阶反射光束与来自参考平面镜的光束发生干涉，从而在 13 毫米的扩大范围内进行 Z 方向测量。一阶衍射光束在同一路径上往返于刻度光栅之间，因此无论刻度光栅的 Z 位置如何，一阶衍射光束都能与用于 X 方向测量的反射零阶光束发生干涉。我们制作了一个传感器原型，以展示拟议光学设计在扩大 Z 范围方面的有效性。此外，还对测量结果进行了不确定性分析。

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引用次数: 0

An in-depth analysis of MWCNTs and graphene nanofluids-based EDM: Investigating surface integrity in Inconel 825 superalloy 深入分析基于 MWCNT 和石墨烯纳米流体的放电加工：调查 Inconel 825 超合金的表面完整性

IF 3.5 2区工程技术 Q2 ENGINEERING, MANUFACTURING

Precision Engineering-Journal of the International Societies for Precision Engineering and Nanotechnology

Pub Date : 2024-10-30 DOI: 10.1016/j.precisioneng.2024.10.018

Pankaj Sharma , Vishal Singh , Manoj Kumar Sinha

The current study systematically explores the potential of nanofluids (NFs) as dielectric media in EDM to enhance the surface integrity of Inconel 825. To achieve this objective, applying nanofluids involves ensuring uniform dispersion of nanoparticles, specifically emphasising efficient heat dissipation, thereby aligning EDM processes. This investigation focuses on utilising MWCNTs NFs, graphene NFs, and hybrid NFs (maintaining a 1:1 ratio of nanoparticles) with a hydrocarbon-based EDM oil as the base fluid. This study marks a pioneering attempt to implement these NFs in the EDM process for Inconel 825. Comprehensive characterizations of NFs have been conducted before their application in the EDM process. These have included assessments of hydrodynamic diameter, zeta potential, dynamic viscosity, thermal conductivity, and breakdown voltage. A comparative analysis has been performed between the outcomes of NFs-based EDM and conventional EDM (using EDM oil). The results show that using graphene NFs, followed by MWCNTs NFs and hybrid NFs, improves thermal conductivity and stability during the EDM process. This results in an enhanced material removal rate and better surface roughness. In-depth examinations of surface irregularities, surface microcracks, recast layer thickness, and grain orientation are carried out using scanning electron microscopy and electron backscattered diffraction. Moreover, residual stress and microhardness are systematically determined to gain further insights into surface integrity. The results indicate that the comparatively higher dispersion of graphene within base dielectric fluid provided better surface integrity for ED-machined parts.

本研究系统地探讨了纳米流体（NFs）作为电火花成形加工中的介电介质的潜力，以提高 Inconel 825 的表面完整性。为了实现这一目标，应用纳米流体需要确保纳米颗粒的均匀分散，特别强调高效散热，从而调整放电加工过程。这项研究的重点是利用 MWCNTs NFs、石墨烯 NFs 和混合 NFs（保持 1:1 的纳米粒子比例），并以碳氢化合物为基础的 EDM 油作为基础油。这项研究标志着在 Inconel 825 的放电加工过程中使用这些 NFs 的开创性尝试。在将 NFs 应用于放电加工工艺之前，已经对其进行了全面的表征。其中包括流体力学直径、Zeta 电位、动态粘度、热导率和击穿电压的评估。对基于 NFs 的放电加工和传统放电加工（使用放电加工油）的结果进行了比较分析。结果表明，使用石墨烯 NFs（其次是 MWCNTs NFs 和混合 NFs）可提高放电加工过程中的导热性和稳定性。从而提高了材料去除率和表面粗糙度。利用扫描电子显微镜和电子反向散射衍射对表面不规则性、表面微裂纹、再铸层厚度和晶粒取向进行了深入研究。此外，还系统地测定了残余应力和显微硬度，以进一步了解表面完整性。结果表明，石墨烯在基底电介质流体中的分散度相对较高，为电解加工零件提供了更好的表面完整性。

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引用次数: 0