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In-situ reconditioning mechanism for fixed abrasive pads based on the wear behavior of loose grains Precis. Eng. (IF 3.6) Pub Date : 2024-04-20 Jiapeng Chen, Yanan Peng, Zhankui Wang, Zhenlin Jiang, Baoxiu Wang, Wenjun Wang, Fan Chen, Tao Sun
C-plane sapphire (α-AlO) is a commonly used substrate material for integrated circuits and Light-emitting diodes (LEDs). Efficient, stable, and low-damage lapping processes are used to ensure surface smoothness and meet application requirements. Fixed abrasive pads (FAPs) are typically used for the lapping of sapphire substrates, but the pads are prone to be glazed or even failed. In this study, loose
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A novel F-shaped linear guiding mechanism based compliant positioning stage with restricted parasitic motion Precis. Eng. (IF 3.6) Pub Date : 2024-04-18 Yitong Li, Tingting Ye, Jie Ling, Xiaohui Xiao, Zhao Feng
Positioning stages are significant in precision technologies under higher demands of operation and manufacturing. The performance of the selected guiding mechanisms is a decisive factor affecting the positioning accuracy of the stage. To restrict the parasitic motions along the degrees of constraint during motion transmission, a piezo-actuated compliant positioning stage with novel F-shaped linear
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Reflection techniques of continuous laser beam deflection — A comprehensive overview Precis. Eng. (IF 3.6) Pub Date : 2024-04-15 Marek Dobosz
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Bowtie design for thermal expansion mimicry and mitigation Precis. Eng. (IF 3.6) Pub Date : 2024-04-13 Jimmie Miller
A geometric bowtie design for the purpose of mimicking (matching) and/or mitigating (reducing) the thermal expansion effects between two laterally opposing structures is investigated. A bowtie design is that of two opposing overlapping triangles with farthest sides parallel. This design embodies thermal centering concepts which utilize the relationships of the trigonometric identity known as the law
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A form-grinding wheel optimization method for helical gears based on a PSO-SVM model Precis. Eng. (IF 3.6) Pub Date : 2024-04-11 Yan Li, Gang Li, Zhonghou Wang, Wenmin Zhu
A gear form-grinding optimization method is proposed to obtain an optimal profile of a form-grinding wheel by solving a transcendental equation of the contact line between a form-grinding wheel and a helical gear workpiece. Since the equation of the contact line is transcendental, the relationship between the installation angle of the form-grinding wheel and the shape of the contact line cannot be
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A method combining active control with passive regulation to enhance the vibration suppression capability of linear motor-driven aerostatic stage Precis. Eng. (IF 3.6) Pub Date : 2024-04-09 Yu Xiao, Deping Yu, Dongsheng Chen, Yufeng Jiang
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Assembly accuracy analysis and phase optimization of aero-engine multistage rotors considering surface morphology and non-uniform contact deformation Precis. Eng. (IF 3.6) Pub Date : 2024-04-05 Song Shi, Jianhua Liu, Hao Gong, Nan Shao, Nabil Anwer
The assembly accuracy of multistage rotors is crucial to guarantee the quality and performance of aero engines. However, traditional assembly accuracy analysis methods usually oversimplify geometric deviations as the degrees of freedom (DOF) variations relative to the ideal position, ignoring real surface morphology and the resulting non-uniform contact deformation. Therefore, this paper proposes an
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Study of integrated milling-grinding of microlens array on binderless tungsten carbide with diamond grains ball-end tool Precis. Eng. (IF 3.6) Pub Date : 2024-04-05 Zhongqi Zhang, Tianfeng Zhou, Bin Zhao, Xiaoqiang Yao, Jiyong Zeng
The hardness and brittleness of binderless tungsten carbide, make it difficult to fabricate microlens array (MLA) on it. In this paper, an integrated milling-grinding machining method was used to fabricate MLA on binderless tungsten carbide. A model for predicting the relationship between surface roughness and undeformed chip thickness during the integrated milling-grinding process was proposed. Microgroove
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Material removal rate model for chemical–mechanical polishing of single-crystal SiC substrates using agglomerated diamond abrasive Precis. Eng. (IF 3.6) Pub Date : 2024-04-03 Pengfei Wu, Ning Liu, Xue Li, Yongwei Zhu
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Segmented ternary composite control method considering time delay for high-speed and high-precision linear motor Precis. Eng. (IF 3.6) Pub Date : 2024-04-03 Weizhen Wang, Chi Zhang, Na Sang, Bing Zhao, Zhi Tian, Silu Chen, Guilin Yang
The conventional ternary composite control method utilized in linear motor control offers the advantages of high positioning accuracy and high dynamic response. However, its performance is constrained due to time delays in high-speed and high-precision servo systems. To tackle this problem, a segmented ternary composite control method considering time delay is developed in this work. Firstly, a nominal
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Dynamic vibration modeling of the ball screw feed system considering travel deviation Precis. Eng. (IF 3.6) Pub Date : 2024-04-03 Jinglun Xie, Hutian Feng, Changguang Zhou
The vibration problem of the ball screw feed system in working conditions limits its application in precision machinery. However, few studies have developed models to investigate the vibration mechanism of the ball screw feed system in running status. In this paper, a dynamic model considering travel deviation and ball motion is proposed to explain the vibration mechanism of the ball screw feed system
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Digital twin-enabled error and uncertainty mapping for 3D scanning Precis. Eng. (IF 3.6) Pub Date : 2024-03-27 Saeid Sepahi-Boroujeni, Farbod Khameneifar
3D scanners have great potential to boost the efficiency of geometric inspection if their traceability is established by identifying measurement bias and uncertainty. This article introduces a digital twin for a structured-light 3D scanner that provides these two essential measures in a real-time manner. The error quantification starts from iterated scans taken from a CMM-calibrated ball-plate artifact
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Three-dimensional metrology of microturning tool edge radii Precis. Eng. (IF 3.6) Pub Date : 2024-03-18 Mayra Yucely Beb, Yanis Tadjouddine, Alexandre Boucheny, Olivier Lehmann, Jean-Yves Rauch, Sounkalo Dembélé, Nadine Piat, Sébastien Thibaud
The cutting edge radius is a significant parameter of a micromachining tool. When it is not sufficiently sharp, ploughing, which affects the whole machining process and workpiece quality, will occur. It is then essential to be able to estimate the value of the cutting edge radius accurately. In this paper, a three-dimensional strategy that can be used to measure the microturning tool edge radii is
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Decoupling modeling design and high-precision position control of fast steering mirror Precis. Eng. (IF 3.6) Pub Date : 2024-03-15 Lin Wang, Xuelian Liu, Shuning Liang, Chunyang Wang
For a two-axis fast steering mirror (FSM) based on the flexible chain structure support and voice coil motor drive, the two axes are strongly coupled. This strong coupling may decrease the system positioning accuracy. In this study, the electric kinematics model associated with the voice coil motor and the motion and frequency equations associated with the flexible chain structure were analysed. A
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Research on trajectory control of rotor systems supported by a combination of rolling and hydrostatic bearings Precis. Eng. (IF 3.6) Pub Date : 2024-03-06 Yixin Zhang, Wei Pan, Shujiang Chen, Changhou Lu, Yongtao Zhang
This article presents a novel method for controlling spindle trajectory by matching errors between front and rear bearings. The proposed approach is implemented on a spindle equipped with rolling bearings as the rear support and a hydrostatic bearing as the front support. The proposed technique actively adjusts the amplitude and phase of the spindle trajectory at the hydrostatic bearing to match that
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A review on positioning uncertainty in motion control for machine tool feed drives Precis. Eng. (IF 3.6) Pub Date : 2024-03-06 Li Quan, Wanhua Zhao
The feed system is a typical mechatronics system, as well as motion control equipment, that serves as a fundamental component of CNC machine tools. Developing a precise mechatronic integrated model of the motion control of the feed system is a crucial step in achieving the digital twin and virtual machining. The extant literature extensively covers the dynamic modeling and identification of feed systems
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Towards understanding the influence of structured indenters geometry on material deformation behavior of indentation process Precis. Eng. (IF 3.6) Pub Date : 2024-03-05 Zaizhen Lou, Xiaogang Zheng, Yongda Yan, Han Wang, Aoxiang Zhang, Donghua Zhao, Yanting Yang, Hailong Cui, Yanquan Geng
Nanoindentation has emerged as a pioneering technique for fabricating array structures at the nanoscale. This research incorporates molecular dynamics simulations to investigate the deformation mechanisms of materials influenced by structured indenters exhibiting diverse geometries. The primary objective of this study is to mitigate interference during the continuous indentation applied by the indenters
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A deep-learning based high-accuracy camera calibration method for large-scale scene Precis. Eng. (IF 3.6) Pub Date : 2024-03-05 Qiongqiong Duan, Zhao Wang, Junhui Huang, Chao Xing, Zijun Li, Miaowei Qi, Jianmin Gao, Song Ai
Accurate three-dimensional (3D) measurement for large field of view (FOV) is currently a significant research field. Accordingly, system calibration is crucial to ensure accuracy. However typical calibration methods often involve the use of large calibration objects, which is not only expensive but also difficult to achieve sufficient accuracy. A novel method based on a dual-brand deep neural network
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Effect of laser welding strategy for reducing intermetallic compound formation and residual stress Precis. Eng. (IF 3.6) Pub Date : 2024-03-03 Liwei Chen, Ryo Okawara, Kazuya Matsuda, Masayuki Nakao, Keisuke Nagato
Reductions in automobile weight and carbon dioxide emission are critical for the further development of the automobile industry. Aluminum is a lightweight material that can replace copper in automobile electronic equipment; therefore, laser welding of aluminum and copper is a subject of extensive research. This study investigates the influence of the laser strategy on the laser welding of aluminum
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Machine learning based sinogram interpolation for X-ray computed tomography validated on experimental data Precis. Eng. (IF 3.6) Pub Date : 2024-02-29 Simon Bellens, Patricio Guerrero, Michel Janssens, Patrick Vandewalle, Wim Dewulf
The data driven industry 4.0 and increasing mass-customization of additive manufacturing products require a flexible and high-throughput integration of a 100% quality inspection. While XCT has shown to be a viable non-destructive testing and measurement technique, the long acquisition times remain a stumbling block for a cost-efficient integration in production environments. To mitigate the reduced
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Ensemble learning with support vector machines algorithm for surface roughness prediction in longitudinal vibratory ultrasound-assisted grinding Precis. Eng. (IF 3.6) Pub Date : 2024-02-27 Mingli Zhao, Boxi Xue, Bohan Li, Junming Zhu, Wenbin Song
It is critical to have an accurate prediction of surface roughness () in order to improve grinding productivity, reduce costs, and minimize the period of time required for trials and testing. Although many prediction methods have been developed, fewer studies have been conducted on the prediction of surface roughness in longitudinal ultrasonic vibration-assisted grinding (LUVAG). In this paper, a surface
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Design and testing of a high precision parallel manipulator with hyperbolic–elliptic flexure hinges Precis. Eng. (IF 3.6) Pub Date : 2024-02-26 Yang Zhao, Hasiaoqier Han, Junwei Lin, Yang Zhang, Dawei Li, Tai Liu, Zhenbang Xu
A novel six-degree-of-freedom (6-DOF) parallel manipulator (PM) with a 6-SS configuration is designed as a piston error compensation mechanism in an optical system. To meet the high-precision adjustment requirement, the prismatic hinges are driven by nanometer resolution piezoelectric motors, and hyperbolic–elliptic (H-E) flexure hinges are used as spherical hinges because of their zero clearance and
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A novel vision-based multi-functional sensor for normality and position measurements in precise robotic manufacturing Precis. Eng. (IF 3.6) Pub Date : 2024-02-26 Mohamad Halwani, Abdulla Ayyad, Laith AbuAssi, Yusra Abdulrahman, Fahad Almaskari, Hany Hassanin, Abdulqader Abusafieh, Yahya Zweiri
Cobots play an essential role in the fourth industrial revolution and the automation of complex manufacturing processes. However, cobots still face challenges in achieving high precision, which obstructs their usage in precise applications such as the aerospace industry. Nonetheless, advances in perception systems unlock new cobot manufacturing capabilities. This paper presents a novel multi-functional
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Grinding surface and subsurface stress load of nickel-based single crystal superalloy DD5 Precis. Eng. (IF 3.6) Pub Date : 2024-02-26 Qiang Gong, Ming Cai, Yadong Gong, Minghui Chen, Tao Zhu, Qianqian Liu
Nickel-based single crystal superalloys have broad application prospects in the aerospace field. Their excellent physical properties enable the workpiece to serve in complex environments for a long time, and are often used in the most complex stress and the worst working conditions. However, the damage caused by mechanical material removal deteriorates the wafer surface flatness and die strength, while
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Surface defects formation mechanism of Mg2Si/Al composites by micro cutting Precis. Eng. (IF 3.6) Pub Date : 2024-02-24 Peixing Ning, Ji Zhao, Shijun Ji, Jingjin Li, Handa Dai
MgSi/Al composites have wide application prospects in aerospace and automotive industries. However, many defects often remain on the machined surface after micro cutting. In this paper, the formation mechanism of surface defects of MgSi/Al composites by micro cutting was studied by finite element (FE) simulations and machining experiments. Considering the real microstructure characteristics of MgSi
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Block processing time-based programming for high-speed, high-precision 5-axis machining Precis. Eng. (IF 3.6) Pub Date : 2024-02-23 Toshiaki Otsuki, Hiroyuki Sasahara
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A three-degree-of-freedom piezoelectric actuator with sandwich structure: Design, modeling, and experiment Precis. Eng. (IF 3.6) Pub Date : 2024-02-23 Chao Ning, Longhao Di, Jichun Xing, Ian Howard
With the increased motion requirements of precision drive devices, multi-degree-of-freedom piezoelectric actuators have become key technologies for realizing multi-axis motion control. To expand upon the three-degree-of-freedom piezoelectric stick-slip driving method, a sandwich-type three-degree-of-freedom rotating inertial stick-slip piezoelectric actuator is proposed in this paper. Firstly, the
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Review of ductile machining and ductile-brittle transition characterization mechanisms in precision/ultraprecision turning, milling and grinding of brittle materials Precis. Eng. (IF 3.6) Pub Date : 2024-02-19 Abdur-Rasheed Alao
Brittle materials are applied in optical, semi-conductor, electronic and medical industries. To meet the industrial requirements, excellent surface quality is desired, requiring ductile mode machining (DMM). DMM enables small-scale machining of these materials in a ductile manner having nano-/sub-nanometric surface finish with little/no subsurface damage, minimizing the necessity for the intermediate
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Post-process updating of model parameters to approximate thermal errors of machine tools operating in different configurations Precis. Eng. (IF 3.6) Pub Date : 2024-02-17 Daniel Divíšek, Martin Mareš, Otakar Horejš
Machine tool (MT) thermal errors induced by external and internal heat sources (e.g. changing environment, friction and power losses in MT components) are an important element in machined workpiece inaccuracies. In the past few decades, indirect software compensation techniques have been used to address thermal errors on account of their economic and ecological aspects. Many slightly different approaches
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Line-edge-roughness characterization of photomask patterns and lithography-printed patterns Precis. Eng. (IF 3.6) Pub Date : 2024-02-17 Zhikun Wang, Pengfei Lin, Phuc Nguyen, Jingyan Wang, ChaBum Lee
This paper presents the line-edge-roughness (LER) characterization of the photomask patterns and the lithography-printed patterns by enhanced knife edge interferometry (EKEI) that measures the interferometric fringe patterns occurring when the light is incident on the patterned edge. The LER is defined as a geometric deviation of a feature edge from an ideal sharp edge. The Fresnel number-based computational
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Theoretical predictions and experimental measurements of novel aerostatic bearing with multi-inclined-orifice restrictors for the improvement of stability Precis. Eng. (IF 3.6) Pub Date : 2024-02-14 Puliang Yu, Liang Huang, Shize Li, Liangbin Guo, Min Zhong, Liping Zhang
This paper introduces a novel design featuring a multiple-inclined-orifice restrictor (MIOR) to address the challenge of turbulent vortices and the reduction of nano-vibrations in aerostatic bearings. This design optimizes the angle configuration to alter the dynamic airflow patterns within the chamber, suppress turbulent vortices, and mitigate nano-vibrations. Three-dimensional transient vortical
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Comparing repeatability and reproducibility of topographic measurement types directly using linear regression analyses of measured heights Precis. Eng. (IF 3.6) Pub Date : 2024-02-13 Katarzyna Peta, George Love, Christopher A. Brown
This paper describes and illustrates a convenient, new method for checking repeatability and reproducibility by direct comparisons of measured heights. Focus variation, confocal, and interferometric optical areal profiling have been integrated as modes on the Sensofar S neox and are used here. Repeated, sequential measurements are made with these different types of measurement without repositioning
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Advanced pneumatic microgripper for versatile biomedical micromanipulation Precis. Eng. (IF 3.6) Pub Date : 2024-02-13 Yue Zhao, Hao Wu, Lulu Zheng, Yangjun Wang, Yichen Zhu, Liguo Chen
Microgrippers offer better operational flexibility in biological micromanipulation. However, they face challenges in size miniaturization and environmental adaptability (especially in biological liquid environments). To overcome these challenges, a novel pneumatic microgripper is proposed with a thin-walled multi-airbag structure that directly drives the clamping jaws in motion, with a simple and compact
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Comparative study on micro-milling machinability of titanium alloys prepared by different processes: Forging process, additive manufacturing process and heat-treatment process Precis. Eng. (IF 3.6) Pub Date : 2024-02-13 Zhongwei Chen, Xian Wu, Linjiang He, Feng Jiang, Jianyun Shen, Laifa Zhu
The application of additive manufactured titanium alloy is extensive in aerospace, biomedical, and various important industrial fields. To meet the precision requirements, post-treatment processes such as micro-milling become imperative for additive manufactured parts. In this work, the forged TC4 material and additive manufactured TC4 materials before and after heat-treatment were used as samples
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Dynamic solid-liquid mixing mechanical model of contact surfaces and experiment of M50 aviation bearing steel by using ultrasonic-assisted electrolytic in-process dressing grinding Precis. Eng. (IF 3.6) Pub Date : 2024-02-12 Jianxing Wu, Huaichao Wu, Lv Yang, Fang Lu, Bin Ji, Limei Zhao
The mechanical contact properties of M50 aviation bearing steel surfaces by using ultrasonic-assisted electrolytic in-process dressing (UA-ELID) grinding greatly influence the machined surface's quality. However, in wet grinding conditions, there are three contact forms on the grinding surface: the micro-cutting contact between the diamond abrasive particles of the grinding wheel and the workpiece
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Notch-filter-based repetitive control of fast tool servos for high-performance tracking of periodic trajectories Precis. Eng. (IF 3.6) Pub Date : 2024-02-07 Wei-Wei Huang, Linlin Li, Zhiwei Zhu, Chuxiong Hu, Li-Min Zhu
The achievable performance of conventional repetitive control (CRC) is constrained by the error amplification at the non-harmonic frequencies, the intrinsic sensitivity to the signal period shift and the limited tracking frequency range under fixed sampling rate. To remedy these undesirable behaviors, a notch-filter-based repetitive control (NF-RC) is proposed based on the spectrum-selection filtering
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Velocity plane-based analytical modeling for reconstructing temperature field at tool-chip/work interface Precis. Eng. (IF 3.6) Pub Date : 2024-02-05 Chao Wang, Toru Kizaki, Keisuke Nagato, Zongwei Ren, Naohiko Sugita
Analytical thermal modeling is expected to be an efficient method for a rational heat dissipation strategy and quality assurance of products in oblique cutting processes. In contrast, conventional metal-cutting models are mainly limited to applications for lack of comprehensive analysis and unsustainable experimental validation. In this study, an improved analytical approach based on the velocity plane
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Evaluation of a telescopic simultaneous ballbar in a 3-axis machine tool using a reference equipment Precis. Eng. (IF 3.6) Pub Date : 2024-02-02 Raquel Acero, Francisco Javier Brosed, Marcos Pueo, Sergio Aguado, Juan José Aguilar, Jesús Velazquez
This paper outlines the evaluation methodology for a Telescopic Simultaneous Ballbar (TSB) developed for distance measurement using an interferometer as a reference equipment. The procedure is executed in a 3-axis machine tool, one of the final applications of the TSB that is machine tool volumetric verification. Two distinct evaluation techniques are devised, with the new virtual line approach enabling
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Ultrasonic vibration assisted milling of titanium alloy microchannel Precis. Eng. (IF 3.6) Pub Date : 2024-02-02 Yinwu Zhang, Quanli Zhang, Jing Zhao, Yandan Zhu, Xingyu Fu, Changyong Yang, Yan Chen
For the light weight and chemical stability, Ti–6Al–4V titanium alloy microchannel is an ideal element for fluids controlling, transporting, manipulating, which has been widely used in the aerospace field. However, the poor surface quality of machined microchannels and tool wear pose challenges to performance improvement. In this study, ultrasonic vibration-assisted milling (UVAM) of titanium alloy
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Prediction of profile error in aspheric grinding of spherical fused silica by ensemble learning regression methods Precis. Eng. (IF 3.6) Pub Date : 2024-02-02 Gholamali Nasr, Behnam Davoodi
Given the low thermal expansion coefficient and excellent optical properties of fused silica in UV regions, it is widely used in lenses and other optical components. A precision grinding machine equipped with a cup grinding wheel has been employed for the aspheric grinding of spherical fused silica elements. This study aims to achieve two main objectives: firstly, to identify the contributions of feed
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Thermal error measurement and compensation with torque limit skip in Swiss-type lathe manufacturing Precis. Eng. (IF 3.6) Pub Date : 2024-01-31 Petr Kaftan, Florian Porquez, Josef Mayr, Kévin Pomodoro, Max Keel, David Trombert, Konrad Wegener
This paper presents a new methodology for the measurement of thermal errors of Swiss-type lathes. The basis of the proposed method is the torque limit skip function integrated in the lathe’s control which stops the motion of a linear axis if the torque on the corresponding axis servo is exceeded. The skip signal is triggered via a slow contact between a bar in the lathe’s spindle and an artefact in
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Challenges and opportunities in nano finishing of titanium alloys for biomedical applications: A review Precis. Eng. (IF 3.6) Pub Date : 2024-01-31 Fadia Ahmed Abdullah Naji, Qasim Murtaza, M.S. Niranjan
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Modeling surface roughness profiles generated by the belt finishing process of a 27MnCr5 carburized steel Precis. Eng. (IF 3.6) Pub Date : 2024-01-30 O. Cherguy, F. Cabanettes, S. Han, J. Rech
Belt finishing is a superfinishing process that enables to reach fine surface roughness. This paper proposes a numerical model, predicting belt finishing roughness profiles of a 27MnCr5 carburized steel. It utilizes belt topographies that are then numerically deformed thanks to a specific morphological filter. A method for determining the morphological filter parameters is proposed and depends on the
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Precise lateral measurements of step height standards using Hamming area model Precis. Eng. (IF 3.6) Pub Date : 2024-01-28 Dahi Ghareab Abdelsalam Ibrahim
Since the ISO 5436 profile analysis presents the axial measurements of the step height/depth standards and does not present a direct method for the lateral measurements, a new method based on the Hamming area model for the lateral measurements of step height/depth standards is presented. The basic idea of the method is to mimic the experimental profile of the step height/depth by a combination of the
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Kinematic accuracy analysis for cam mechanism considering dynamic behavior and form deviations Precis. Eng. (IF 3.6) Pub Date : 2024-01-28 Jiangxin Yang, Chengjin Wu, Nan Shao, Fan Liu, Yanlong Cao, Yanpeng Cao, Nabil Anwer
Previous research on tolerance analysis has primarily overlooked the influence of mechanical vibration on the accuracy of motion, neglecting its significance in systems with moving components. To bridge this research gap, we propose an innovative tolerance analysis framework that combines the theories of skin model shapes and system dynamics. The skin model shapes are employed to represent the form
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On-line posture measurement for automatic positioning of foldable-wing with priority-based multi-constraints Precis. Eng. (IF 3.6) Pub Date : 2024-01-24 Jie Huang, Yunfei Fan, Yulei Ji, Nuodi Huang, Yilian Zhang, Yuhan Wang
The digital assembly system is widely used in the automatic positioning of large aircraft components. Accurate posture measurement of the components remains challenging for high-precision assembly of the components with various engineering constraints. Existing methods often require repeated measurements of key features and are susceptible to the pronounced coupled effect, where various constraints
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Positioning accuracy prediction of precision cycloid reducer based on a BDDTE model and use in design optimization Precis. Eng. (IF 3.6) Pub Date : 2024-01-23 Xincheng Wang, Luyang Li, Linbo Hao, Huaming Wang
As users' expectations for precision cycloid reducer positioning accuracy rise, accurate positioning accuracy prediction of products before assembly and design solutions to improve product qualification rates are very important. Considering the actual manufacturing conditions of components, a new multi-source error (MSE) equivalence modeling assumption and pin gear's MSE measurement method are proposed
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A novel macro-fiber-composite stick-slip actuator with large single-step displacements Precis. Eng. (IF 3.6) Pub Date : 2024-01-26 Gaohua Wu, Yiling Yang, Yuguo Cui, Guoping Li, Yanding Wei
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Generation mechanism of the surface morphology on tilted ultrasonic elliptical vibration cutting TC4 titanium alloy Precis. Eng. (IF 3.6) Pub Date : 2024-01-24 Zhen Yin, Jingcai Cheng, Chenwei Dai, Qing miao, Hailong Xu, Qixuan Sun, Hua Li, Zhiqiang Liang, Zhanjie Li
TC4 titanium alloy is utilized in aerospace and a wide range of other applications due to its high strength and corrosion resistance, but its poor thermal conductivity and high ductility introduce challenges in machining. In this paper, firstly, a mathematical model of workpiece surface morphology under tilted ultrasonic elliptical vibration cutting (TUEVC) was established based on the tip trajectory
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Simplifying the monoscopic deflectometric measurement by extra-facility-free workpiece positioning Precis. Eng. (IF 3.6) Pub Date : 2024-01-23 Yunuo Chen, Xiangchao Zhang, Wei Lang, Ting Chen, Zhifei Hu, Xiangqian Jiang
Monoscopic deflectometry is a powerful and flexible measuring method for optical surfaces. Precise workpiece positioning is of significance because it directly determines the reliability of the measurement results. But unfortunately, the need for additional facilities severely limits the application of the monoscopic deflectometry. In this paper, a self-positioning method is proposed by combining the
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An assembly accuracy analysis approach of mechanical assembly involving parallel and serial connections considering form defects and local surface deformations Precis. Eng. (IF 3.6) Pub Date : 2024-01-23 Tuan-Hui Shen, Cong Lu
Tolerance analysis including tolerance model representation and assembly deviation propagation, is a key approach for predicting and controlling the assembly accuracy of mechanical product. In the current researches, the Non-Gaussian skin model shapes (NSMS) is a valid approach to represent tolerance model of parts considering form defects. However, there is a lack of valid methods to analyze the deviation
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Investigation on evaluation and prediction of surface roughness and terahertz reflectivity analysis of the SiCp/Al composites component by diamond turning Precis. Eng. (IF 3.6) Pub Date : 2024-01-22 Menghui Lan, Bing Li, Xiang Wei, Xiuyuan Wu, Zijie Sun
SiCp/Al composites are suitable for satisfying the lightweight requirements of terahertz wave-reflecting components. In this paper, diamond-turned surfaces of 60 % high volume fraction SiCp/Al composites are characterized in terms of surface roughness and terahertz reflectivity. The finished surfaces of SiCp/Al composites are obtained using single-point diamond turning with different process parameters
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Geometric error suppression of six-axis machine tool for blisk full-shape surface grinding via constrained error sensitivity analysis Precis. Eng. (IF 3.6) Pub Date : 2024-01-23 Shuai Chen, Tingyue Bai, Yun Zhang, Zhenglong Fang, Zhitong Chen
A six-axis machining configuration is proposed to improve the surface quality and finishing efficiency of an aeroengine blisk. It flexibly enlarges the accessible interference-free space of the tool for finishing the full-shape surface, including the blade body, root, and hub surfaces. An error model for tool contact posture with respect to the kinematic axis errors is established, revealing the relationship
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Telecentric phase imaging at extended depth of focus using digital holographic microscopy Precis. Eng. (IF 3.6) Pub Date : 2024-01-23 Vineeta Kumari, Neelam Barak, Ajay K. Sharma, Arun Anand, Gyanendra Sheoran
Digital holographic microscopy (DHM) is a well-known technique utilized by researchers to precisely examine the 3D topography of microscopic objects. Until now, DHM systems have offered researchers a trade-off between either achieving telecentricity or maintaining a limited depth of focus, presenting a challenge for comprehensive 3D imaging. Here, we propose a very stable DHM system that utilizes a
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On the actuation nonlinearity of normal-stressed electromagnetic nanopositioning stages Precis. Eng. (IF 3.6) Pub Date : 2024-01-17 Li Chen, Qiang Liu, LiMin Zhu, Zhiwei Zhu
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Tool condition monitoring in micro milling of brittle materials Precis. Eng. (IF 3.6) Pub Date : 2024-01-19 Zheng Gong, Dehong Huo
This paper introduces a novel indirect tool condition monitoring (TCM) system for micro-milling brittle materials (glass and silicon) based on acoustic emission (AE) and cutting force signals. The milling experiments are also applied to a ductile material (steel) for comparison. Tool wear calibration is conducted to determine the three tool wear stages. The collected signals are processed in time,
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Novel concept of self-adaptive clamping for precision injection molding Precis. Eng. (IF 3.6) Pub Date : 2024-01-18 Qing-wen Yuan, Yan-gen Lai, Xin-liang Zou, Jin-ping Qu
Clamping precision as a key factor of precision injection molding of high-quality plastic parts is restricted by low-precision clamping systems. Herein, a novel clamping method capable of sensing mold misalignment and self-adjusting mold position and attitude through floating structures is proposed to eliminate the restriction of clamping system, thereby achieving high clamping precision. The innovative
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CNN-based method for chromatic confocal microscopy Precis. Eng. (IF 3.6) Pub Date : 2024-01-10 Juanjuan Wu, Ye Yuan, Tao Liu, Jiaqi Hu, Delong Xiao, Xiang Wei, Hanming Guo, Shuming Yang
In view of the inevitable error problems caused by peak extraction, calibration curve fitting and other essential operations in the traditional data processing of chromatic confocal microscopy (CCM), a regression model based on convolutional neural network (CNN) is proposed so that the above necessary operations are no longer required. This CNN-based regression model draws on the core concepts of the
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Thermal error compensation in length inspection of large-scale aircraft spars in nonuniform temperature environments Precis. Eng. (IF 3.6) Pub Date : 2024-01-10 Junqing Li, Wei Liu, Yang Zhang, Yongkang Lu, Yipin Su, Yan Zheng, Mengde Zhou
As the primary load-bearing structures, large-scale aircraft spars are subject to the influence of nonuniform temperatures in field conditions, resulting in thermal errors during on-site length inspections. These errors require accurate compensation. Conventional linear scaling methods, based on the assumption of uniform temperatures and a retrieved coefficient of thermal expansion (CTE), suffer from