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

A magnetically actuated microgripper with functionally partitioned multi-material design for cell manipulation 一种用于细胞操作的磁驱动微夹持器，具有功能分区的多材料设计

IF 3.7 2区工程技术 Q2 ENGINEERING, MANUFACTURING

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

Pub Date : 2026-01-20 DOI: 10.1016/j.precisioneng.2026.01.023

Qiqiang Sun , Mingzhu Yin , Shuxin Wang , Jinhua Li , Lizhi Pan

In biomedical applications, microgrippers made from single materials often compromise between precision and gentle interaction with biological specimens. To address this challenge, this paper presents a magnetically actuated microgripper with a functionally partitioned multi-material design, fabricated through a template-assisted assembly strategy. The microgripper comprises an M-shaped actuation unit fabricated from magnetorheological elastomer, a transmission unit produced through additive manufacturing using photosensitive resin, and an interaction unit formed with Ecoflex coating. This functionally partitioned multi-material design enables controlled magnetic actuation, accurate force and motion transmission, and compliant biological contact. To characterize and optimize the actuation performance, we employ the beam constraint model for deformation analysis of the actuation unit, and conduct finite element analysis to refine its dimensional parameters. Magnetic actuation is realized by a miniature coil mounted on the microgripper, allowing effective actuation without external magnetic setups. The template-assisted assembly ensures precise alignment and reliable integration of the functional units. Performance tests show that the microgripper achieves a gripping stroke exceeding 2000

μ

m with a displacement resolution of approximately 1.5

μ

m, and operates reliably over 300 cycles. Furthermore, the zebrafish embryonic cell manipulation experiment achieves a 100% success rate, with no noticeable adverse effects on cell viability or development. The measured gripping force during operation (0.13 mN) remains well below the cellular damage threshold, ensuring non-destructive manipulation. These results demonstrate the applicability of the microgripper for biological manipulation, with promising applications in cell handling, developmental biology, and minimally invasive biomedical procedures.

在生物医学应用中，由单一材料制成的微夹持器通常在精度和与生物标本的温和相互作用之间折衷。为了解决这一挑战，本文提出了一种磁致动微夹持器，该夹持器具有功能分区的多材料设计，通过模板辅助组装策略制造。微夹持器包括一个由磁流变弹性体制成的m形驱动单元，一个通过使用光敏树脂的增材制造制造的传动单元，以及一个由Ecoflex涂层形成的相互作用单元。这种功能分区的多材料设计实现了可控的磁致动，准确的力和运动传输，以及柔性的生物接触。为了表征和优化驱动性能，我们采用梁约束模型对驱动单元进行变形分析，并进行有限元分析以细化其尺寸参数。磁性驱动是通过安装在微夹持器上的微型线圈实现的，无需外部磁性设置即可实现有效的驱动。模板辅助组装确保了功能单元的精确对齐和可靠集成。性能测试表明，该微夹持器夹持行程超过2000 μm，位移分辨率约为1.5 μm，并且在300多个循环中可靠运行。此外，斑马鱼胚胎细胞操作实验达到100%的成功率，对细胞活力和发育没有明显的不利影响。操作过程中测量的握力（0.13 mN）仍远低于细胞损伤阈值，确保非破坏性操作。这些结果证明了微夹持器在生物操作方面的适用性，在细胞处理、发育生物学和微创生物医学程序方面具有广阔的应用前景。

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引用次数: 0

Nonlinear vibration analysis and global sensitivity-driven optimization of large-length-to-diameter ratio grinding spindles under mass eccentricity excitation 质量偏心激励下大长径比磨削主轴非线性振动分析及全局灵敏度优化

IF 3.7 2区工程技术 Q2 ENGINEERING, MANUFACTURING

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

Pub Date : 2026-01-20 DOI: 10.1016/j.precisioneng.2026.01.022

Zijun Zhu , Xianglong Zhu , Yindi Cai , Renke Kang , Shuli Wang , Quanbao Sheng

Grinding spindles with a large length-to-diameter (L/D) ratio exhibit low structural stiffness and are susceptible to mass eccentricity, which can lead to dynamic instability. To accurately predict their vibration characteristics, this study establishes a coupled dynamic model of the shell, core shaft, and bearing system, incorporating structural flexibility and nonlinear excitation. The model explicitly accounts for the excitation induced by the mass eccentricity inherent in the coupling structure of the spindle. Using a combined approach of Morris global sensitivity analysis and multiple regression, the influence laws and weight coefficients of bearing stiffness, material properties, and eccentric mass on the dynamic response are investigated both qualitatively and quantitatively. Experimental validation confirms a high consistency between the measured and predicted vibration displacements and dominant frequencies. The results indicate that rotor eccentric mass and rotational speed are the dominant factors affecting radial vibration displacement, with eccentric mass being the most sensitive parameter. Furthermore, mass eccentricity excitation is found to prominently excite vibrations at the 10th harmonic frequency. Based on the sensitivity analysis, an optimal material combination is identified, which achieves a 5.1 % reduction in dynamic vibration amplitude compared to the original configuration. This work provides a validated methodology for optimizing the design of high-precision grinding spindles and predicting their dynamic performance at the design stage, particularly for spindles with large L/D ratios under mass eccentricity excitation.

长径比大的磨削主轴结构刚度低，易受质量偏心的影响，从而导致动力失稳。为了准确预测其振动特性，本研究建立了考虑结构柔性和非线性激励的壳体、芯轴和轴承系统的耦合动力学模型。该模型明确地考虑了主轴耦合结构中固有的质量偏心所引起的激励。采用Morris全局灵敏度分析和多元回归相结合的方法，定性和定量地研究了轴承刚度、材料性能和偏心质量对动力响应的影响规律和权重系数。实验验证证实了测量和预测的振动位移与主导频率之间的高度一致性。结果表明，转子偏心质量和转速是影响径向振动位移的主要因素，其中偏心质量是最敏感的参数。此外，发现质量偏心激励显著地激发了10次谐波频率的振动。基于灵敏度分析，确定了最优的材料组合，与原结构相比，动态振动幅值降低了5.1%。这项工作为高精度磨削主轴的优化设计和在设计阶段预测其动态性能提供了一种有效的方法，特别是对于质量偏心激励下具有大L/D比的主轴。

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引用次数: 0

Frequency-domain compliance design of a vertical flat piezoelectric flexure nanopositioner 垂直扁平压电挠性纳米对位器的频域柔化设计

IF 3.7 2区工程技术 Q2 ENGINEERING, MANUFACTURING

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

Pub Date : 2026-01-19 DOI: 10.1016/j.precisioneng.2026.01.020

Yuheng Gu, Yiteng Zhang, Jie Zhu, Mingxiang Ling

Piezoelectrically actuated nanopositioners based on compliant mechanisms have attracted considerable attention, due to their wide applications in all kinds of precision engineering fields. A vertical piezoelectric nanopositioner featuring a flat architecture and amplified strokes is designed, modeled and experimentally evaluated. The flexure structure is configured by combining a double parallelogram mechanism and a semi-bridge-type compliant amplification mechanism to reduce the vertical height, while retaining a relatively high lateral stiffness. The frequency-domain compliance of the designed flexure nanopositioner is straightforwardly established based on a three-dimensional dynamic compliance matrix method (DCM) to concurrently capture the kinetostatic and dynamic characteristics. The compliance-related indexes, such as the degrees of freedom and constraint, mobility, natural frequencies and harmonic resonance responses, are analyzed in a parametric way. The theoretical results are compared and verified with the finite element simulation and experimental testing, which exhibits a good agreement. The measuring results of a prototype indicate that it delivers a working stroke of 75 μm, output stiffness of 0.06 N/μm, lateral stiffness of 3.22 N/μm and fundamental resonance frequency of 1815 Hz with a compact size of 62 mm × 62 mm × 13 mm.

基于柔性机构的压电驱动纳米位移器由于其在各种精密工程领域的广泛应用而引起了广泛的关注。设计了一种具有平面结构和放大冲程的垂直压电纳米对立器，并对其进行了建模和实验评估。柔性结构采用双平行四边形机构和半桥式柔性放大机构组合配置，降低了垂直高度，同时保持了较高的横向刚度。基于三维动态柔度矩阵法（DCM）直接建立了柔性纳米机器人的频域柔度，同时捕捉了其动、静态特性。对柔性相关指标，如自由度和约束度、迁移率、固有频率和谐振响应进行了参数化分析。将理论计算结果与有限元模拟和实验测试结果进行了比较和验证，结果吻合较好。样机测量结果表明，该系统的工作行程为75 μm，输出刚度为0.06 N/μm，横向刚度为3.22 N/μm，基频为1815 Hz，结构尺寸为62 mm × 62 mm × 13 mm。

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引用次数: 0

Constrained electrolyte selective electrochemical polishing with porous ceramic plates: Mechanism of material removal 多孔陶瓷板约束电解质选择性电化学抛光：材料去除机理

IF 3.7 2区工程技术 Q2 ENGINEERING, MANUFACTURING

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

Pub Date : 2026-01-19 DOI: 10.1016/j.precisioneng.2026.01.019

Kanglin Pei , Jun Yi , Bibing Xiao , Hui Deng , Bing Chen

To address the challenges of non-uniform dissolution, insufficient flattening efficiency, and defect inheritance in conventional electrochemical polishing (ECP), this study proposes a constrained-electrolyte selective electrochemical polishing (CESECP) method employing a porous ceramic plate (PCP). The method utilizes a high-flatness PCP to confine the electrolyte into a uniform liquid film and incorporates a dynamic planetary motion mechanism to achieve efficient surface flattening. The surface-leveling capability and material removal mechanisms during electrochemical polishing under electrolyte-constrained conditions were investigated. Experimental results demonstrate that CESECP effectively mitigates surface defects and reduces workpiece surface irregularities, with the improvement efficiency governed by liquid film thickness. A nonlinear relationship model between liquid film thickness and the average pore size of the PCP was established based on Jurin's law and capillary dynamics, revealing the unimodal functional behavior of liquid film thickness. This model clarifies the influence mechanism of liquid film thickness on surface flattening quality, providing a theoretical foundation for optimizing key process parameters, particularly in balancing liquid film uniformity and material removal rate.

针对传统电化学抛光（ECP）存在的溶解不均匀、压平效率不高、缺陷遗传等问题，提出了一种基于多孔陶瓷板（PCP）的约束电解质选择性电化学抛光（CESECP）方法。该方法利用高平整度PCP将电解质限制在均匀的液膜中，并结合动态行星运动机构来实现有效的表面平整化。研究了电解约束条件下电化学抛光的表面流平性能和材料去除机理。实验结果表明，CESECP能有效地减轻工件表面缺陷，减少工件表面不规则性，提高效率与液膜厚度有关。基于Jurin定律和毛细动力学，建立了液膜厚度与PCP平均孔径的非线性关系模型，揭示了液膜厚度的单峰函数行为。该模型阐明了液膜厚度对表面展平质量的影响机理，为优化关键工艺参数，特别是平衡液膜均匀性和材料去除率提供了理论依据。

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引用次数: 0

Investigation on surface quality improvement of laser powder bed fusion-fabricated internal channels via free abrasive assisted electrochemical polishing 自由磨料辅助电化学抛光改善激光粉末床熔制内通道表面质量的研究

IF 3.7 2区工程技术 Q2 ENGINEERING, MANUFACTURING

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

Pub Date : 2026-01-16 DOI: 10.1016/j.precisioneng.2026.01.017

Yanliang Li , Baojie Yu , Weiye Hu , Tao Yang , Xiaoyun Hu , Yongbin Zeng

To improve the surface quality of internal channels in AlMgScZr alloy parts fabricated by laser powder bed fusion (LPBF), this study proposes an innovative hybrid process termed free abrasive assisted electrochemical polishing (FAECP), which synergistically combines electrochemical dissolution with free abrasive erosion. The concentration and velocity distribution of free abrasives within the interelectrode gap were simulated, and the synergistic effects between electrochemical dissolution and abrasive erosion during the FAECP were experimentally investigated. The results demonstrate that abrasive erosion effectively removes passive film and adhered products at surface peaks, thereby enhancing localized dissolution rates and mitigating non-uniform dissolution of the anode material. Concurrently, electrochemical dissolution softens the surface metallic layer, facilitating more efficient direct material removal by abrasive erosion. Compared to conventional electrochemical polishing (ECP), FAECP significantly improves both surface quality and polishing efficiency. Furthermore, the curved channels with an inner diameter of 5 mm were polished using a custom flexible tool electrode, the semi-welded particles and surface texture were completely removed, and the surface roughness Sa was reduced from 7.35-16.72 μm to 1.30–2.03 μm and the thickness loss was 180 μm.

为了提高激光粉末床熔合（LPBF） AlMgScZr合金零件内部通道的表面质量，本研究提出了一种创新的混合工艺，即自由磨料辅助电化学抛光（FAECP），该工艺将电化学溶解与自由磨料侵蚀协同结合。模拟了电极间隙内游离磨料的浓度和速度分布，并对电化学溶解与磨料侵蚀的协同效应进行了实验研究。结果表明，磨料侵蚀可以有效地去除表面峰处的钝化膜和粘附产物，从而提高了阳极材料的局部溶解速率，减轻了阳极材料的不均匀溶解。同时，电化学溶解软化了表面金属层，有利于通过磨料侵蚀更有效地直接去除材料。与传统电化学抛光（ECP）相比，FAECP显著提高了表面质量和抛光效率。利用定制的柔性工具电极对内径为5 mm的弯曲通道进行抛光，完全去除半焊接颗粒和表面织构，表面粗糙度Sa从7.35 ~ 16.72 μm降低到1.30 ~ 2.03 μm，厚度损失为180 μm。

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引用次数: 0

Adaptive neural network fixed-time control of piezoelectric actuator for precision motion tracking 压电驱动器精确运动跟踪的自适应神经网络定时控制

IF 3.7 2区工程技术 Q2 ENGINEERING, MANUFACTURING

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

Pub Date : 2026-01-15 DOI: 10.1016/j.precisioneng.2026.01.015

Yunzhi Zhang , Zhao Feng , Jie Ling , Chenyang Ding

Piezoelectric actuators (PEAs) are critical in precision motion applications due to their high precision and fast response. Existing control methods for PEAs rely heavily on the accurate model integrated in the controllers to realize the precision motion tracking. However, complicated dynamics and inherent hysteresis nonlinearity bring challenges in modeling and identification. The accompanying model uncertainties bring difficulties for the rapid convergence of the tracking error and precision motion tracking of PEAs in the application. To overcome these limitations, this paper proposes an adaptive neural network fixed-time control (ANNFTC) scheme. The ANNFTC integrates the backstepping method and online neural network compensation, both designed according to the practical fixed-time stability. Unlike the fixed-time control (FTC) and related works, ANNFTC requires no prior knowledge of hysteresis while ensuring robustness to external disturbance and model uncertainties, including unmodeled dynamics and hysteresis nonlinearity. Rigorous proof of practical fixed-time convergence for the tracking error is provided, along with comprehensive experimental validation conducted on a PEA. The experimental campaign encompasses reference tracking across frequencies ranging from 1 to 10 Hz and peak-to-peak amplitudes from 1 to 9

μ

m, as well as hybrid-frequency sinusoidal tracking in the presence of input disturbances. Experimental results show that compared to other tested FTCs, ANNFTC achieves better tracking accuracy and more rapid convergence time of tracking error under different initial states, the existence of model uncertainties, and the external disturbance.

压电驱动器因其高精度和快速响应而在精密运动应用中发挥着至关重要的作用。现有的机器人控制方法严重依赖于控制器中集成的精确模型来实现精确的运动跟踪。然而，复杂的动力学和固有的滞后非线性给建模和识别带来了挑战。伴随的模型不确定性给应用中跟踪误差的快速收敛和精确运动跟踪带来了困难。为了克服这些限制，本文提出了一种自适应神经网络固定时间控制（ANNFTC）方案。该方法结合了逆推法和在线神经网络补偿，两者都是根据实际定时稳定性设计的。与固定时间控制（FTC）及相关工作不同，ANNFTC不需要预先了解迟滞，同时确保对外部干扰和模型不确定性（包括未建模的动力学和迟滞非线性）的鲁棒性。给出了跟踪误差实际固定时间收敛性的严格证明，并在PEA上进行了全面的实验验证。实验活动包括参考跟踪，频率范围从1到10 Hz，峰值幅度从1到9 μm，以及存在输入干扰的混合频率正弦跟踪。实验结果表明，在不同初始状态、存在模型不确定性和外部干扰的情况下，ANNFTC与其他已测试的ftc相比，具有更好的跟踪精度和更快的跟踪误差收敛时间。

{"title":"Adaptive neural network fixed-time control of piezoelectric actuator for precision motion tracking","authors":"Yunzhi Zhang , Zhao Feng , Jie Ling , Chenyang Ding","doi":"10.1016/j.precisioneng.2026.01.015","DOIUrl":"10.1016/j.precisioneng.2026.01.015","url":null,"abstract":"<div><div>Piezoelectric actuators (PEAs) are critical in precision motion applications due to their high precision and fast response. Existing control methods for PEAs rely heavily on the accurate model integrated in the controllers to realize the precision motion tracking. However, complicated dynamics and inherent hysteresis nonlinearity bring challenges in modeling and identification. The accompanying model uncertainties bring difficulties for the rapid convergence of the tracking error and precision motion tracking of PEAs in the application. To overcome these limitations, this paper proposes an adaptive neural network fixed-time control (ANNFTC) scheme. The ANNFTC integrates the backstepping method and online neural network compensation, both designed according to the practical fixed-time stability. Unlike the fixed-time control (FTC) and related works, ANNFTC requires no prior knowledge of hysteresis while ensuring robustness to external disturbance and model uncertainties, including unmodeled dynamics and hysteresis nonlinearity. Rigorous proof of practical fixed-time convergence for the tracking error is provided, along with comprehensive experimental validation conducted on a PEA. The experimental campaign encompasses reference tracking across frequencies ranging from 1 to 10 Hz and peak-to-peak amplitudes from 1 to 9 <span><math><mi>μ</mi></math></span>m, as well as hybrid-frequency sinusoidal tracking in the presence of input disturbances. Experimental results show that compared to other tested FTCs, ANNFTC achieves better tracking accuracy and more rapid convergence time of tracking error under different initial states, the existence of model uncertainties, and the external disturbance.</div></div>","PeriodicalId":54589,"journal":{"name":"Precision Engineering-Journal of the International Societies for Precision Engineering and Nanotechnology","volume":"99 ","pages":"Pages 246-257"},"PeriodicalIF":3.7,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145978558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Precision pulse dynamics wire electrochemical machining with structured electrodes 结构电极精密脉冲动态线材电化学加工

IF 3.7 2区工程技术 Q2 ENGINEERING, MANUFACTURING

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

Pub Date : 2026-01-13 DOI: 10.1016/j.precisioneng.2026.01.016

Zhao Han , Xu Han , Xiaolong Fang

Wire electrochemical machining (WECM) offers a promising solution for processing high-strength, high-hardness materials for aeroengine components. However, scattered corrosion and nonconcentrated electric fields hamper the process. In mitigation, pulse dynamic WECM (PD-WECM) has been proposed to optimize electric field distribution during cutting, significantly reducing slit width while achieving superior surface quality. This method involves categorizing the surface of the rotating electrode into active (work) and inactive (non-work) areas from a circumferential perspective. A chopping system is employed to synchronize power with work-area alignment, thereby concentrating the electric field and enhancing the mass transfer using wedged electrodes with insulating coatings. The chopping system reduces surface roughness to 0.59 μm, a 43 % decrease, and the wedged electrodes minimize slit width by 401 μm (17 %) compared to the result machined by circular electrode without the chopping system, thus enhancing mass transfer efficiency. Compared with continuous-electric-field WECM, our chopping technique is superior. Under conditions involving a 180° power-on angle using wedged electrodes with insulating coatings, we stabilized the slit sidewall roughness at ∼0.254 μm and maintained a slit width of ∼1.3 mm.

线电解加工（WECM）为航空发动机部件的高强度、高硬度材料的加工提供了一种很有前途的解决方案。然而，分散的腐蚀和不集中的电场阻碍了这一过程。在减缓方面，脉冲动态WECM （PD-WECM）被提出用于优化切割过程中的电场分布，显著减小狭缝宽度，同时获得优异的表面质量。这种方法包括从周向角度将旋转电极的表面分为活动（工作）和非活动（非工作）区域。采用斩波系统将功率与工作区域对准同步，从而集中电场，并利用带有绝缘涂层的楔形电极增强传质。切割系统将表面粗糙度降低到0.59 μm，降低了43%，楔形电极的狭缝宽度比没有切割系统的圆形电极的狭缝宽度减少了401 μm(17%)，从而提高了传质效率。与连续电场WECM相比，我们的斩波技术具有优势。在180°上电角的条件下，使用带有绝缘涂层的楔形电极，我们将狭缝侧壁粗糙度稳定在0.254 μm，并保持狭缝宽度为1.3 mm。

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引用次数: 0

A novel exploration of low damage elliptical ultrasonic vibration assisted cutting method for high-power fiber laser beam shapers 高功率光纤激光束成形器低损伤椭圆超声振动辅助切割方法的新探索

IF 3.7 2区工程技术 Q2 ENGINEERING, MANUFACTURING

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

Pub Date : 2026-01-13 DOI: 10.1016/j.precisioneng.2026.01.013

Ganyu Chen , Yupeng Xiong , Cheng Huang , Yang Ou , Jiafu Zhou , Yifan Dai

High-power fiber lasers are crucial for defense and industrial applications owing to their superior energy-conversion efficiency and beam quality. However, a fiber laser usually exhibits a Gaussian distribution of the optical intensity mode. This decreases the beam energy utilization efficiency and increases the laser damage probability for the optics in high-power laser systems. Therefore, this study presents the design and fabrication of a novel integrated dual-aspheric beam shaper for transforming the Gaussian beam of high-power fiber lasers into a collimated flat-top profile while preserving the phase distribution with a high fill factor. Addressing the manufacturing challenges of the small-aperture, steeply curved of the shaper and the hard-to-machine characteristics of fused silica, this research employs elliptical ultrasonic vibration cutting (EUVC) technology as a low-damage processing method for fused silica beam shapers manufacturing. Kinematic analysis confirms that the periodic tool-workpiece separation in EUVC reduces cutting forces. Subsurface damage (SSD) detection experiments demonstrate a 60 % reduction in SSD compared to conventional ultraprecision cutting. Analysis indicates that discontinuous tool-workpiece contact suppresses micro-crack propagation. Laser shaping experiments validate that the EUVC fabricated shaper achieved controlling the intensity distribution of the fiber laser into flat profiles and realized a far-field energy concentration of 50.19 %, a near-field uniformity of 83.44 % and a laser-induced damage threshold (LIDT) of 10 kW/cm², confirming its significant potential for high-power fiber laser shaping.

高功率光纤激光器由于其优越的能量转换效率和光束质量，在国防和工业应用中至关重要。然而，光纤激光器的光强模式通常呈高斯分布。这降低了光束能量的利用效率，增加了高功率激光系统中光学器件的激光损伤概率。因此，本研究提出了一种新型集成双非球面光束整形器的设计和制造，用于将高功率光纤激光器的高斯光束转换成准直平顶轮廓，同时保持高填充系数的相位分布。针对熔融二氧化硅成形器孔径小、弯曲度大、加工难度大的特点，采用椭圆超声振动切割（EUVC）技术制造熔融二氧化硅光束成形器，实现了低损伤加工。运动学分析证实了EUVC中刀具与工件的周期性分离减小了切削力。亚表面损伤（SSD）检测实验表明，与传统的超精密切割相比，SSD减少了60%。分析表明，刀具与工件的不连续接触抑制了微裂纹的扩展。激光整形实验验证了EUVC制造的整形器实现了将光纤激光器的强度分布控制为平坦型，远场能量浓度达到50.19%，近场均匀性达到83.44%，激光诱导损伤阈值（LIDT）达到10 kW/cm2，证明了其在高功率光纤激光整形领域的巨大潜力。

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引用次数: 0

On-machine measurement error modeling and compensation in three-axis machine tools based on measurement error transformation matrices 基于测量误差变换矩阵的三轴机床测量误差建模与补偿

IF 3.7 2区工程技术 Q2 ENGINEERING, MANUFACTURING

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

Pub Date : 2026-01-12 DOI: 10.1016/j.precisioneng.2026.01.014

Zelong Li , Yifan Dai , Chao liang Guan , Tao Lai , Hao Hu

On-machine measurement technologies can improve manufacturing efficiency and precision with broad applicability. For three-axis machine tools, measuring and compensating for 21 geometric errors is essential to improve measurement accuracy. Multibody models are widely used to establish volumetric error models, but the coordinate systems lack a clear definition. There is a large Abbe error when the actual measurement point and the ideal measurement point are not aligned. Therefore, this paper proposes a novel on-machine measurement spatial-error modeling and compensation approach by establishing measurement error transformation matrices. This method can eliminate Abbe error during measurement and improve the accuracy of spatial error compensation in on-machine measurement. Through experimental verification, measurement accuracy was improved by 86.4 % after spatial error compensation.

机内测量技术可以提高制造效率和精度，具有广泛的适用性。对于三轴机床，21个几何误差的测量和补偿是提高测量精度的关键。多体模型被广泛用于建立体积误差模型，但坐标系缺乏明确的定义。当实际测量点与理想测量点不对齐时，存在较大的阿贝误差。为此，本文通过建立测量误差变换矩阵，提出了一种新的机上测量空间误差建模与补偿方法。该方法可以消除测量过程中的阿贝误差，提高在机测量中空间误差补偿的精度。经实验验证，经空间误差补偿后，测量精度提高了86.4%。

引用次数: 0

Advances on the mechanical robustness of superhydrophobic surfaces: Strategies, fabrication, and test 超疏水表面机械稳健性的研究进展：策略、制造和测试

IF 3.7 2区工程技术 Q2 ENGINEERING, MANUFACTURING

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

Pub Date : 2026-01-10 DOI: 10.1016/j.precisioneng.2026.01.006

Douwei Liu, Wenbin Zhong, Wenhan Zeng, Xiangqian Jiang

Since the discovery of the self-cleaning property of lotus leaves, superhydrophobic surfaces have attracted significant attention due to their great potential in various engineering applications, including self-cleaning, enhanced heat transfer, antifouling, antibacterial, anti-icing, and droplet manipulation. However, their structural fragility continues to limit practical implementation. In recent years, remarkable progress has been made in developing mechanically robust superhydrophobic surfaces, covering aspects such as wetting theory, structured surface design, and advanced fabrication techniques. Nevertheless, a systematic review of these recent achievements is still lacking, which is crucial for providing new insights and guiding future research. Therefore, this paper comprehensively reviews recent advances in four key areas—wetting theory, robust superhydrophobic surface design strategies, advanced fabrication techniques, and testing methodologies—aiming to identify potential future research directions and offer new perspectives for the development of superhydrophobic surfaces.

自发现荷叶的自清洁特性以来，超疏水表面因其在自清洁、强化传热、防污、抗菌、防冰、液滴操纵等各种工程应用方面的巨大潜力而备受关注。然而，它们的结构脆弱性继续限制着实际实施。近年来，在开发机械坚固的超疏水表面方面取得了显著进展，包括润湿理论、结构表面设计和先进的制造技术。然而，对这些最新成果的系统回顾仍然缺乏，这对于提供新的见解和指导未来的研究至关重要。因此，本文从润湿理论、稳健的超疏水表面设计策略、先进的制备技术和测试方法四个关键领域综述了近年来的研究进展，旨在确定潜在的未来研究方向，为超疏水表面的发展提供新的视角。

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引用次数: 0