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An ADRC Parameters Self-Tuning co.trol Strategy of Tension System Based on RBF Neural Network

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Journal of Renewable Materials 2023年第4期11卷 1991-2014页

作者： Shanhui Liu Haodi Ding Ziyu Wang Li’e Ma Zheng Li Faculty of printing Packaging Engineering and Digital Media TechnologyXi’an University of TechnologyXi’an710048China shaanxi beiren printing machinery co. Ltd.Weinan714000China

High precision co.trol of substrate tension is the premise and guarantee for producing high-quality products in roll-to-roll precision co.ting ***,the co.plex relationships in tension system make the problems of deco.pling co.trol difficult to be solved,which has limited the improvement of tension co.trol accuracy for the co.ting ***,an ADRC parameters self-tuning deco.pling strategy based on RBF neural network is proposed to improve the co.trol accuracy of tension system in this ***,a global co.pling nonlinear model of the tension system is established acco.ding to the co.position of the co.ting machine,and the global co.pling model is linearized based on the first-order Taylor ***,acco.ding to the linear model of the tension system,a parameters self-tuning deco.pling algorithm of the tension system is proposed by integrating feedforward co.trol,ADRC and ***,the simulation results show that the proposed tension co.trol strategy has good deco.pling co.trol performance and effectively improves the tension co.trol accuracy for the co.ting machine.

关键词： co.ting machine tension system deco.pling co.trol ADRC RBF

co.or restoration method of printing in machine visual detection

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Chinese Optics Letters 2014年第A1期12卷 98-103页

作者：刘澎赵宁任玲辉徐倩倩 Northwestern PolytechnicM University Xi'an 710072 China co.lege of printing and Packaging Engineering Xi'an University of Technology Xi'an 710048 China Xi'an Aaerospace-huayang printing & Packaging machinery co. ltd Xi'an 710100 China

It is found that application of Retinex co.or co.stancy algorithm in machine vision can weaken light interference on printing chromatic aberration. We propose a new method of fusion of Weighted Least Squares and Multi-Scale Retinex in the L＊a＊b＊ co.or space for the purpose of further enhancing the degree of reco.ery of prints co.ors. The effectiveness of the proposed method is tested against experiments on images of tile same original print acquired in different illuminants. The method exhibits a good application prospect in machine vision in virtue of its great co.or co.sistency capability in maintaining the co.or of the original print.

关键词： 150.1135 Algorithms 150.1708 co.or inspection

In-situ density measurement for plastic injection molding via ultrasonic technology

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Frontiers of Mechanical Engineering 2022年第4期17卷 217-228页

作者： Zhengyang DONG Peng ZHAO Kaipeng JI Yuhong CHEN Shiquan GAO Jianzhong FU State Key Laboratory of Fluid Power and Mechatronic Systems College of Mechanical EngineeringZhejiang UniversityHangzhou 310027China Key Laboratory of 3D printing Process and Equipment of Zhejiang Province College of Mechanical EngineeringZhejiang UniversityHangzhou 310027China Beijing Institute of Aeronautical Materials Beijing 100095China Haitian Plastics machinery Group co. Ltd.Ningbo 315801China

Density variation during the injection molding process directly reflects the state of plastic melt and co.tains valuable information for process monitoring and ***,in-situ density measurement is of great interest and has significant application *** existing methods,such as pressure−volume−temperature(PVT)method,have the shortages of time-delay and high co.t of *** study is the first to propose an in-situ density measurement method using ultrasonic *** analyses of the time-domain and frequency-domain signals are co.bined in the proposed *** ultrasonic velocity is obtained from the time-domain signals,and the aco.stic impedance is co.puted through a full-spectral analysis of the frequency-domain *** with different process co.ditions are co.ducted,including different melt temperature,injection speed,material,and mold *** show that the proposed method has good agreement with the PVT *** proposed method has the advantages of in-situ measurement,non-destructive,high accuracy,low co.t,and is of great application value for the injection molding industry.

关键词： ultrasonic measurement melt density in-situ measurement injection molding

Single-electromagnet levitation for density measurement and defect detection

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Frontiers of Mechanical Engineering 2021年第1期16卷 186-195页

作者： Yuhan JIA Peng ZHAO Jun XIE Xuechun ZHANG Hongwei ZHOU Jianzhong FU The State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310027China Key Laboratory of 3D printing Process and Equipment of Zhejiang Province Zhejiang UniversityHangzhou 310027China Jiangsu Jianghuai Magnetic Industry co. Ltd.Huaian 211700China Tederic machinery co. Ltd.Hangzhou 311224China

This paper presents a single-electromagnet levitation device to measure the densities and detect the internal defects of antimagnetic *** experimental device has an electromagnet in its lower part and a pure iron co.e in the upper *** the electromagnet is activated,samples can be levitated stably in a paramagnetic *** with traditional magnetic levitation devices,the single-electromagnet levitation device is *** currents,electromagnet shapes,and distances between the electromagnet and iron co.e are used in the experiment depending on the type of *** magnetic field formed by the electromagnet is *** the co.centration of the MnCl aqueous solution is 3 mol/L,the measuring range of the single-electromagnet levitation device ranges from 1.301 to 2.308 g/***,with the same co.centration of MnCl aqueous solution(3 mol/L),the measuring range of a magnetic levitation device built with permanent magnets is only from 1.15 to 1.50 g/*** single-electromagnet levitation device has a large measuring range and can realize accurate density measurement and defect detection of high-density materials,such as glass and aluminum alloy.

关键词： single-electromagnet electromagnetic levitation density measurement defect detection

Cutting Experiment of Fraxinus mandshurica UsingWaterjet-Assisted co.(2)Laser

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Journal of Renewable Materials 2023年第9期11卷 3583-3593页

作者： Yueqiang Yu Minzheng Jiang Sheng Gao Ting Jiang Bakary S.Doumbia Bo Yan Tingang Ma Kexin Ren Yinsong Liu co.lege of Mechanical Science and Engineering Northeast Petroleum UniversityDaqing163318China Forestry and Woodworking machinery Engineering Technology Center Northeast Forestry UniversityHarbin150040China Research and Development Center of 3D printing Material and Technology Northeast Forestry UniversityHarbin150040China

High-quality wood products and valuable wood crafts receive everyone’s favor with the rapid development of the *** order to improve the cutting surface quality of wood forming parts,the cutting experiment of renewable Fraxinus mandshurica was co.ducted by waterjet-assisted co.(2)laser(WACL)technology.A quadratic mathematical model for describing the relationship between surface roughness changes and cutting parameters was *** effects of cutting speed,flow pressure and laser power on the kerf surface roughness of Fraxinus mandshurica when cutting transversally were discussed by response surface *** experimental results showed that kerf surface roughness decreased under a lower laser power,higher cutting speed and higher flow *** the cutting speed was 30 mm/s,flow pressure was 1.58 MPa and laser power was 45 W,the actual surface roughness of the optimized Fraxinus mandshurica was 2.41μm,and it was in acco.d with the theoretically predicted surface roughness value of 2.54μm,so the model fitted the actual situation *** the analysis of 3D profile morphology and micromorphology,it was co.cluded that the optimized kerf surface of Fraxinus mandshurica was smoother,the cell wall was not destroyed and the tracheid was *** provides the theoretical basis for wood micromachining.

关键词： Green processing waterjet-assisted co.(2)laser machining transverse cutting response surface method surface roughness

Additive manufacturing and foundry innovation

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China Foundry 2021年第4期18卷 286-295页

作者： Yu-sheng Shi Jin-liang Zhang Shi-feng Wen Bo Song Chun-ze Yan Qing-song Wei Jia-min Wu Ya-jun Yin Jian-xin Zhou Rui Chen Wei Zhou He-ping Jia Huan-qing Yang Hai Nan State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Engineering Research Center of Ceramic Materials for Additive Manufacturing Ministty of EducationWuhan 430074China Shenyang Research Institute of Foundry co. Ltd.Shenyang 110011China Liaoning Senyuan Additive Manufacturing Technology Co.Ltd.Anshan 114000LiaoningChina Jiangsu Jiuyu machinery co. LtdSuzhou 215300China Xi'an Space Engine co.pany co. Ltd.Xi'an 710100China Beijing Institute of Aeronautical Materials Beijing 100095China

Additive manufacturing is expected to transform and upgrade the traditional foundry industry to realize the integrated manufacturing and rapid and low-co.t development of high-performance co.ponents with co.plex *** additive manufacturing technology co.monly applied in casting mold preparation(fusible molds,sand molds/co.es and ceramic co.es)mainly includes selective laser sintering(SLS)and binder injection three-dimensional printing(3DP).In this work,the research status of SLS/3DP-casting processes on material preparation,equipment development,process optimization,simulation and application cases in aerospace,automotive and other fields were ***,the developing trends of the additive manufacturing technology in the future of foundry field are introduced,including multi-material sand molds(metal co.e included),ceramic co.e-shell integration and die-casting dies with co.formal co.ling runners.

关键词： additive manufacturing foundry selective laser sintering 3D printing multiple materials die-casting dies

Binder jetting 3D printing process optimization for rapid casting of green parts with high tensile strength

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China Foundry 2021年第4期18卷 335-343页

作者： Zhao-fa Zhang Li Wang Lin-tao Zhang Peng-fei Ma Bing-heng Lu Chen-wei Du Micro and Nano Technology Research Center State Key Laboratory for Manufacturing Systems EngineeringXi’an Jiaotong UniversityXi’an 710049China National Innovation Institute of Additive Manufacturing Xi’an 710065China Beijing Hangxing machinery Manufacturing co. Ltd.Beijing 100013China

Binder jetting 3D printing is a rapid,co.t effective,and efficient moulding/co.e making process,which can be applied to a large variety of ***,it exhibits a relatively low green-part *** may cause the co.lapse of the printed parts during de-caking and the pick-up procedure,especially in the case of small-scale structures,such as thin walls,tips,and *** this work,polyvinyl alco.ol(PVA)was used as the additive in co.ted sand *** exploiting the binding effect between the two co.posites(thermoplastic phenolic resin and PVA)triggered by the binder,bonding necks firmly form among the sand particles,improving the green-part strength of the co.ted sand printed *** based on the Taguchi method were used to investigate the relationship between the process parameters and the green-part tensile *** following set of optimal process parameters was identified:50wt.%alco.olicity of the binder,75%binder saturation,0.36 mm layer thickness and 4.5wt.%PVA ***,the effect of such parameters on the green-part tensile strength was determined via statistical *** green part of an engine cylinder head sand pattern with co.plex cavity structures was printed,and the green-part tensile strength reached 2.31 ***,the ZL301 aluminum alloy impeller shape casting was prepared using sand molds printed with the optimal process *** results co.firm that the proposed binder jetting 3D printing process can guarantee the integrity of the printed green parts and of small-size structures during de-caking and the pick-up ***,the casting made from the printed sand molds exhibits a relatively high quality.

关键词： binder jetting green-part strength co.ted sand polyvinyl alco.ol rapid casting

co.ling co.trol for castings by adopting skeletal sand mold design

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China Foundry 2021年第1期18卷 18-28页

作者： Jin-wu Kang Hao-long Shangguan Fan Peng Jing-ying Xu Cheng-yang Deng Yong-yi Hu Ji-hao Yi Tao Huang Long-jiang Zhang Wei-min Mao School of Materials Science and Engineering Key Laboratory for Advanced Materials Processing TechnologyTsinghua UniversityBeijing100084China Kocel machinery Limited Ningxia750021China School of Materials Science and Engineering University of Science and Technology BeijingBeijing100083China Beijing DRUCK Technology Development co.Ltd. Beijing100084China

The co.ling co.trol of the melt during the casting process is of great significance. A co.prehensive closed-loop co.ling co.trol of castings by adopting a skeletal sand mold design was proposed. The skeletal sand mold co.sisting of an adaptive shell, functional cavities and a support was designed and created based on the finite difference meshes of a casting. It was applied to a round wall test casting. Two kinds of skeletal sand molds, one with lattice support and the other with enforcing ribs for this casting were designed and printed out by the 3 D printing(3 DP) method. Aluminum alloy A356 was cast by using these two sand molds. The first mold was co.led by natural co.vection, the other one by water spray co.ling. Two sound castings were obtained. The sand mold temperature, co.ling curves, microstructures, mechanical properties, residual stress and deformation were measured, co.pared and discussed. Water spray co.ling hastened the co.ling rate by 62%, increased the co.tent of Mg and Cu in the α-Al matrix, improved the mechanical properties, and altered the surface residual stress state.

关键词： skeletal sand mold 3D printing(3DP) casting solidification co.ling