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

{"title":"Adaptive fixturing of non-rigid workpieces for coordinate measurements","authors":"Maciej Byszewski ,&nbsp;Adam Woźniak","doi":"10.1016/j.precisioneng.2025.07.001","DOIUrl":"10.1016/j.precisioneng.2025.07.001","url":null,"abstract":"<div><div>The paper presents a new method of fixturing non-rigid workpieces during their measurements using a coordinate measuring machine. The new fixturing method consists in the use of active supports and an algorithm for optimal location of active supports. In order to experimentally verify the proposed method of fixturing non-rigid elements experimental and simulation studies are presented. The use of the developed adaptive fixturing allowed for an eight-fold reduction of the error associated with gravitational interaction. The adaptive fixturing method is fully scalable and can also be used in the case of large-sized workpieces.</div></div>","PeriodicalId":54589,"journal":{"name":"Precision Engineering-Journal of the International Societies for Precision Engineering and Nanotechnology","volume":"96 ","pages":"Pages 455-463"},"PeriodicalIF":3.5,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144572640","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}

{"title":"Correction for the heel effect in helical μCT scans for accurate densitometry","authors":"Jorden De Bolle ,&nbsp;Louis Verschuren ,&nbsp;Jan Van den Bulcke ,&nbsp;Matthieu N. Boone","doi":"10.1016/j.precisioneng.2025.06.019","DOIUrl":"10.1016/j.precisioneng.2025.06.019","url":null,"abstract":"<div><div>In most conventional X-ray tubes, the anode target is tilted with respect to the optical axis of the measurement system. However, the tilt causes a spatial variation of the X-ray spectrum throughout the generated X-ray beam, a spatio-spectral effect called the (anode) heel effect. Since the sample in a micro computed tomography (<span><math><mi>μ</mi></math></span>CT) scan experiences an asymmetry in the X-ray beam spectrum due to the heel effect, the projection images will contain an asymmetry as well. This influences the resulting reconstructions from the <span><math><mi>μ</mi></math></span>CT scan. As a consequence, the heel effect hinders an accurate determination of local material densities with <span><math><mi>μ</mi></math></span>CT, particularly when using a helical trajectory. In this paper, a method will be demonstrated that is capable of correcting for the heel effect in helical <span><math><mi>μ</mi></math></span>CT scans where the heel effect is oriented perpendicular to the rotation axis. This increases the accuracy of the obtained local mass densities. In addition, the method removes beam hardening effects. The method is based on a lookup table (LUT) that is used to correct pixel values in the normalised projection images of the <span><math><mi>μ</mi></math></span>CT scan in order to eliminate the asymmetry introduced by the heel effect. We demonstrate this correction algorithm on a helical <span><math><mi>μ</mi></math></span>CT scan of wood increment cores, which sufficiently satisfies the method’s requirement of a homogeneous chemical composition. Nonetheless, the method can be used in a wide variety of applications.</div></div>","PeriodicalId":54589,"journal":{"name":"Precision Engineering-Journal of the International Societies for Precision Engineering and Nanotechnology","volume":"96 ","pages":"Pages 476-486"},"PeriodicalIF":3.5,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144587562","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}

{"title":"Modification and optimization of spatial tooth profile for harmonic drive considering machining fillet feature in the hobbing process","authors":"Feifei Yuan,&nbsp;Ke Xiao,&nbsp;Linjun Li,&nbsp;Yanfeng Han,&nbsp;Cheng Wang,&nbsp;Guo Xiang,&nbsp;Xiujie Chen","doi":"10.1016/j.precisioneng.2025.07.003","DOIUrl":"10.1016/j.precisioneng.2025.07.003","url":null,"abstract":"<div><div>This paper studies the modification and optimization of spatial tooth profile for harmonic drive, especially considering machining fillet feature in the hobbing process. The work begins with an analysis of the spatial deformation of the flexspline and its motion trajectory, allowing for the determination of an envelope for the motion trajectory of flexspline teeth. Based on the hobbing process characteristics, we propose a modification calculation method by calculating the vertical distance at engagement points between this envelope and the circular spline teeth profile, the modification values that ensure non-interference engagement is obtained. Besides, the introduction of the machining fillet feature into the tooth profile design is explored, revealing its positive impact on the stress distribution of harmonic drive. A finite element model is utilized to assess the effectiveness of modification and optimization of spatial tooth profile for harmonic drive. Finite element simulation results demonstrate that the modification and optimization considering fillet feature proposed in this paper effectively redistributes contact stress towards the middle section of the teeth and improves stress concentration at the ends. This work provides a theoretical basis for the service life expanding and reliability improvement.</div></div>","PeriodicalId":54589,"journal":{"name":"Precision Engineering-Journal of the International Societies for Precision Engineering and Nanotechnology","volume":"96 ","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144563192","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}

{"title":"Corrigendum to “Measurement of sample stage error motions in cone-beam X-ray computed tomography instruments by minimization of reprojection errors” [Precision Eng 67 (2021) 48–57]","authors":"Massimiliano Ferrucci ,&nbsp;Wim Dewulf ,&nbsp;Alkan Dönmez","doi":"10.1016/j.precisioneng.2025.06.007","DOIUrl":"10.1016/j.precisioneng.2025.06.007","url":null,"abstract":"","PeriodicalId":54589,"journal":{"name":"Precision Engineering-Journal of the International Societies for Precision Engineering and Nanotechnology","volume":"96 ","pages":"Pages 1025-1026"},"PeriodicalIF":3.7,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145048307","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}

{"title":"Ductile machining of single-crystal germanium freeform optics via ultra-precision diamond turning for high-performance infrared imaging systems","authors":"Kundan Kumar Prasad ,&nbsp;M.P. Singh ,&nbsp;Vipender Singh Negi ,&nbsp;Vinod Mishra ,&nbsp;Sunil Jha ,&nbsp;Gufran Sayeed Khan","doi":"10.1016/j.precisioneng.2025.06.020","DOIUrl":"10.1016/j.precisioneng.2025.06.020","url":null,"abstract":"<div><div>This study focuses on the precise fabrication of cubic phase freeform optics on single-crystal germanium (sc-Ge) for infrared (IR) imaging systems, addressing thermal-induced defocus challenges. Achieving nanometric surface finish and high form accuracy in sc-Ge via diamond turning machining (DTM) is challenging due to the material's brittleness. To overcome this, a novel groove generation model is developed to optimize DTM parameters and minimize brittle fractures using various cutting approaches. Additionally, the study demonstrates that a hybrid cutting approach, which combines constant angle and arc methods, achieves ductile-based machining and enhances surface quality significantly. Precise workpiece alignment is vital for ensuring high form accuracy in freeform optics; therefore, a fiducial-based method is developed for characterization using a mechanical profilometer, and a long-wavelength interferometry measurement. Final surface evaluation utilized a computer-generated hologram (CGH) in a Fizeau interferometer, achieving a form error of 0.47 μm and surface roughness (Sa) of 2 nm for cubic freeform optics which is acceptable in the infrared imaging system. The developed optics are integrated into an infrared camera within a wavefront coding setup to counteract thermal defocus. This work provides valuable insights into brittle-ductile transitions and nano-surface generation, enhancing machining techniques for IR freeform optics.</div></div>","PeriodicalId":54589,"journal":{"name":"Precision Engineering-Journal of the International Societies for Precision Engineering and Nanotechnology","volume":"96 ","pages":"Pages 380-397"},"PeriodicalIF":3.5,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144534369","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}

{"title":"Near-zero-vibration non-contact transportation by single-body decoupled 2-DOF magnetic levitator for multi-size targets with unknown mass","authors":"Jae Woo Jung,&nbsp;Eun Kyu Kim,&nbsp;Hyeong Min Yoon,&nbsp;Jun Young Yoon","doi":"10.1016/j.precisioneng.2025.06.009","DOIUrl":"10.1016/j.precisioneng.2025.06.009","url":null,"abstract":"<div><div>This paper presents a near-zero-vibration control (NZVC) method to significantly reduce the inertial disturbance for high-throughput non-contact transportation of multi-size levitated targets with unknown mass using a single-body 2-DOF magnetic levitation actuator. The proposed NZVC method is composed of two key components: (1) a parameter estimation algorithm designed to identify the target size with unknown mass and the associated changes in system dynamics, and (2) an adaptive feedforward controller, capable of compensating for inertial disturbances in the levitated targets during high-acceleration transportation. The proposed parameter estimation algorithm, which is based on the comprehensive system model that integrates the magnetic levitation actuator and the fiber optical sensor, enables accurate estimation of the size of the targets with an error of less than 1<span><math><mtext>%</mtext></math></span>. The NZVC method, combined with an adaptive feedforward controller, achieves a maximum of 87.4<span><math><mtext>%</mtext></math></span> and 52.2<span><math><mtext>%</mtext></math></span> reduction in the target vibration and accumulated energy consumption by decreasing the current required to compensate for the undesired vibration from inertial disturbances during high-throughput non-contact transportation.</div></div>","PeriodicalId":54589,"journal":{"name":"Precision Engineering-Journal of the International Societies for Precision Engineering and Nanotechnology","volume":"96 ","pages":"Pages 319-328"},"PeriodicalIF":3.5,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144471024","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}

{"title":"Piezoelectric damping of position dependent parasitic resonances for improved performance of flexure-based manipulators","authors":"Bram Seinhorst ,&nbsp;Marijn Nijenhuis ,&nbsp;Wouter Hakvoort","doi":"10.1016/j.precisioneng.2025.06.004","DOIUrl":"10.1016/j.precisioneng.2025.06.004","url":null,"abstract":"<div><div>The performance of precision machinery is often limited by parasitic vibration modes of the system. These parasitic resonances typically limit the actuation bandwidth, can lead to long settling times and can degrade the end-effector standstill performance when disturbance forces or floor vibrations are present. As a complicating factor, the parasitic resonance frequencies may vary over the workspace of the system. Conventional design guidelines focuses on stiff and lightweight design, leading to high parasitic resonance frequencies. However, for further improvement in performance, damping of some of the problematic resonances is required. In this work, a flexure-based manipulator is considered that exhibits performance limiting resonances, of which the frequencies vary with the deflection of the manipulator. An active damping approach, based on integrating piezoelectric material in the flexures which actively suppress the parasitic vibration modes is proposed and experimentally validated. Using a scheduled vibration controller, the actuation budget is effectively and efficiently used to suppress targeted parasitic resonances over the entire workspace, leading to a significant increase in the dynamic and steady state performance of the flexure-based manipulator. The resonance peak height of the first four parasitic resonances is reduced by a factor 10 over the majority of the workspace. This results in a modal damping of these resonances in the range <span><math><mrow><mn>2</mn><mtext>–</mtext><mn>7</mn><mtext>%</mtext></mrow></math></span>. Due to the resonance peak suppression, the control bandwidth of the Lorentz actuator for the intended motion of the manipulator can effectively be doubled. Lastly, it is shown that the higher control bandwidth and improved settling behaviour of parasitic resonances lead to better disturbance rejection and faster cycle times for an indexing setpoint task.</div></div>","PeriodicalId":54589,"journal":{"name":"Precision Engineering-Journal of the International Societies for Precision Engineering and Nanotechnology","volume":"96 ","pages":"Pages 368-379"},"PeriodicalIF":3.5,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144523090","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}

{"title":"Advances in surface finishing technology for wind turbine gears: A comprehensive review","authors":"Lijun Cheng ,&nbsp;Wenhui Li ,&nbsp;Xiuhong Li ,&nbsp;Min Zhang ,&nbsp;Xuejie Wen ,&nbsp;Liangchen wang ,&nbsp;Hao Xie ,&nbsp;Jingyi Liu ,&nbsp;Rongxue Wu ,&nbsp;Shengqiang Yang","doi":"10.1016/j.precisioneng.2025.06.015","DOIUrl":"10.1016/j.precisioneng.2025.06.015","url":null,"abstract":"<div><div>The increasing energy scarcity and the threat of environmental pollution are significant obstacles to enhancing global economic growth. In this context, wind energy is a crucial focus due to its clean and sustainable nature. The demands for large-scale wind turbines, lightweight core components, independent key technologies, intelligent industrial development, and flexible production processes have heightened the requirements for the surface integrity of wind turbine gears. The surface integrity of wind turbine gears, which feature numerous teeth, deep grooves, and large modulus, is directly related to wind turbines' operational efficiency and service life. This paper thoroughly overviews the current technical challenges associated with finishing wind turbine gears. It systematically reviews domestic and international research findings and application statuses related to wind turbine gear surface finishing technologies. The paper summarizes and compares various surface finishing methods' technical characteristics and applications, emphasizing their effectiveness in improving gear surface integrity. Ultimately, it presents a concise discussion on adaptive strategies for implementing advanced gear finishing techniques in wind turbine gears and an outlook on future developments. It offers valuable insights and practical recommendations to address the challenges of wind turbine gear finishing.</div></div>","PeriodicalId":54589,"journal":{"name":"Precision Engineering-Journal of the International Societies for Precision Engineering and Nanotechnology","volume":"96 ","pages":"Pages 277-303"},"PeriodicalIF":3.5,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144335960","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}

{"title":"Precision deflection control of thin-walled plates in pressure-assisted milling: Synergistic thresholds and multi-objective optimization","authors":"Xuezhi Wang ,&nbsp;Kelin Chen ,&nbsp;Shengtong Su ,&nbsp;Yanli Lin ,&nbsp;Wei Du ,&nbsp;Zhubin He","doi":"10.1016/j.precisioneng.2025.06.018","DOIUrl":"10.1016/j.precisioneng.2025.06.018","url":null,"abstract":"<div><div>This study proposes an optimization method based on synergistic threshold adjustment to address the deflection control challenges in the pressure-assisted milling process of Al7075-T6 thin-walled plates. A synergistic threshold system was established, integrating critical deflection (<span><math><mrow><msub><mi>D</mi><mtext>cr</mtext></msub></mrow></math></span> = 0.25–0.4 mm) and critical pressure (<span><math><mrow><msub><mi>P</mi><mtext>cr</mtext></msub></mrow></math></span> = 0.25–0.3 MPa), to simultaneously suppress elastoplastic instability and enhance machining efficiency. The strategy was further optimized using the Non-dominated Sorting Genetic Algorithm (NSGA-II) for multi-objective parameter selection. Experimental results demonstrate that the pressure-assisted (<em>P</em>) significantly improves structural rigidity, reducing the thin-walled plates maximum deflection by 80 % (from &gt;1.0 mm to 0.2 mm). The <span><math><mrow><msub><mi>D</mi><mtext>cr</mtext></msub></mrow></math></span> threshold effectively prevents plastic deflection by confining equivalent strain below the material yield limit, ensuring machining integrity. The <span><math><mrow><msub><mi>P</mi><mtext>cr</mtext></msub></mrow></math></span> threshold optimizes contact stress distribution, achieving dynamic equilibrium between instability suppression and energy consumption control; exceeding this range diminishes deflection inhibition efficiency. Under particularly aggressive machining parameters (axial depth of cut <em>a</em>_p &gt; 0.5 mm, feed per tooth <span><math><mrow><msub><mi>f</mi><mi>z</mi></msub></mrow></math></span> &gt;0.25 mm/tooth), the material removal rate (MRR) achieved a 100 % increase when pressure-assisted was applied (<em>P</em> = 0.2 MPa) compared to conventional machining without pressure assistance (<em>P</em> = 0 MPa). Pareto-optimal parameter sets derived from NSGA-II achieved simultaneous deflection reduction and MRR improvement, surpassing the limitations of conventional processes in both machining accuracy and efficiency. This deflection control method, enabled by parameter synergy, provides theoretical and practical guidance for high-efficiency precision machining of thin-walled plates.</div></div>","PeriodicalId":54589,"journal":{"name":"Precision Engineering-Journal of the International Societies for Precision Engineering and Nanotechnology","volume":"96 ","pages":"Pages 329-345"},"PeriodicalIF":3.5,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144491612","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}

{"title":"An optimization method of honing wheel parameters for lower-noise honed tooth surface texture","authors":"Xu Zhang ,&nbsp;Congbo Li ,&nbsp;You Zhang ,&nbsp;Chenghui Zhang ,&nbsp;Linman Wu","doi":"10.1016/j.precisioneng.2025.06.016","DOIUrl":"10.1016/j.precisioneng.2025.06.016","url":null,"abstract":"<div><div>In practical applications, some surface textures of honed gear almost coincide with the transmission contact lines, resulting in irregular vibration noise. This study presents an optimization method of honing wheel parameters for lower-noise honed tooth surface texture. Firstly, the influence of process parameters, honed gear parameters, and honing wheel parameters on the honed tooth surface texture distribution is analysed. Then, based on the kinematics models of the honing process and honed gear transmission, the distribution model of the honed tooth surface texture on the transmission contact line is established. Furthermore, a finite element simulation is utilized to analyze the influence of the different position relationships between honed tooth surface textures and transmission contact lines (the angles) on the friction-induced vibration and noise. Based on the results of finite element analysis, a multi-objective optimization strategy of honing wheel parameters for lower-noise honed tooth surface texture distribution is established. Finally, <strong>Noise Vibration and Harshness (</strong>NVH<strong>)</strong> contrast and verification tests are carried out on a new energy vehicle. The result shows that the optimized distribution of honed tooth surface texture can suppress the occurrence of irregular vibration and reduce the maximum transmission noise by 3.5 dB (about 13.7 %).</div></div>","PeriodicalId":54589,"journal":{"name":"Precision Engineering-Journal of the International Societies for Precision Engineering and Nanotechnology","volume":"96 ","pages":"Pages 304-318"},"PeriodicalIF":3.5,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144364678","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}