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Effect of wire diameter compression ratio on drawing deformation of micro copper wire
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作者 Tao HUANG Han-jiang WU +3 位作者 Ke-xing SONG Yan-min ZHANG Yan-jun ZHOU Shao-lin LI 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2024年第8期2605-2618,共14页
A crystal plasticity finite element model was developed for the drawing deformation of pure copper micro wire,based on rate-dependent crystal plasticity theory.The impact of wire diameter compression ratio on the micr... A crystal plasticity finite element model was developed for the drawing deformation of pure copper micro wire,based on rate-dependent crystal plasticity theory.The impact of wire diameter compression ratio on the micro-mechanical deformation behavior during the wire drawing process was investigated.Results indicate that the internal deformation and slip of the drawn wire are unevenly distributed,forming distinct slip and non-slip zones.Additionally,horizontal strain concentration bands develop within the drawn wire.As the wire diameter compression ratio increases,the strength of the slip systems and the extent of slip zones inside the deformation zone also increase.However,the fluctuating stress state,induced by contact pressure and frictional stress,results in a rough and uneven wire surface and diminishes the stability of the drawing process. 展开更多
关键词 micro copper wire drawing deformation crystal plasticity finite element slip mode
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Prediction of mechanical properties for deep drawing steel by deep learning 被引量:2
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作者 Gang Xu Jinshan He +2 位作者 Zhimin Lü Min Li Jinwu Xu 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2023年第1期156-165,共10页
At present,iron and steel enterprises mainly use“after spot test ward”to control final product quality.However,it is impossible to realize on-line quality predetermining for all products by this traditional approach... At present,iron and steel enterprises mainly use“after spot test ward”to control final product quality.However,it is impossible to realize on-line quality predetermining for all products by this traditional approach,hence claims and returns often occur,resulting in major eco-nomic losses of enterprises.In order to realize the on-line quality predetermining for steel products during manufacturing process,the predic-tion models of mechanical properties based on deep learning have been proposed in this work.First,the mechanical properties of deep drawing steels were predicted by using LSTM(long short team memory),GRU(gated recurrent unit)network,and GPR(Gaussian process regression)model,and prediction accuracy and learning efficiency for different models were also discussed.Then,on-line re-learning methods for transfer learning models and model parameters were proposed.The experimental results show that not only the prediction accuracy of optimized trans-fer learning models has been improved,but also predetermining time was shortened to meet real time requirements of on-line property prede-termining.The industrial production data of interstitial-free(IF)steel was used to demonstrate that R2 value of GRU model in training stage reaches more than 0.99,and R2 value in testing stage is more than 0.96. 展开更多
关键词 machine learning recurrent natural network transfer learning on-line prediction deep drawing steel mechanical properties
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Calibration of the DEM sliding friction and rolling friction parameters of a cohesionless bulk material
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作者 Jonatan Marín Pérez Tugrul Comlekci +1 位作者 Yevgen Gorash Donald MacKenzie 《Particuology》 SCIE EI CAS CSCD 2024年第9期126-139,共14页
The discrete element method(DEM)has become a valuable tool for understanding the mechanical behaviour of granular assemblies,however,the accuracy of the DEM simulations depends on several interaction parameters such a... The discrete element method(DEM)has become a valuable tool for understanding the mechanical behaviour of granular assemblies,however,the accuracy of the DEM simulations depends on several interaction parameters such as the sliding friction and rolling friction coefficients.Generally,these parameters are estimated using bulk calibration approach(BCA)where the draw down test has been suggested as an effective way to approach these coefficients.This test provides up to four bulk criteria,the angle of repose,shear angle,mass flow rate and the mass loss which are used to narrow down the possible coefficients.However,there is still more research needed around it to fully understand how this methodology works.An experimental and numerical study was carried out using the draw down test to assess the influence of different mass flow rates and particle shapes on DEM parameters for a cohesionless bulk material.It is concluded that use of multi-sphere particles and three aperture sizes in the draw down test to calibrate the sliding and rolling friction parameters of a cohesionless bulk material can converge to a small feasible region in which a single combination of the friction coefficients can be selected.The calibrated sliding and rolling friction coefficients were validated using multi-sphere particles,where the maximum deviation was 5.9%from the experimental values. 展开更多
关键词 Discrete element method CALIBRATIon draw down Sliding friction Rolling friction Particle shape
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Modeling asymmetric fracture mechanics of Mg alloy wire in drawing process
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作者 Sunghoon Choi Jongwon Shin +1 位作者 Joung Sik Suh Dongchoul Kim 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2024年第5期2057-2069,共13页
In this study,a numerical analysis was conducted on the ductile fracture of a 2-mm diameter Mg-1Zn-0.5Mn-0.5Sr-0.1Ca alloy wire during drawing.The hexagonally close-packed crystal structure of Mg alloys causes asymmet... In this study,a numerical analysis was conducted on the ductile fracture of a 2-mm diameter Mg-1Zn-0.5Mn-0.5Sr-0.1Ca alloy wire during drawing.The hexagonally close-packed crystal structure of Mg alloys causes asymmetric fracture behavior,especially in the compression region.The aim of this study is to develop a comprehensive damage model for Mg alloy wire that accurately predicts ductile fracture,with a focus on the compression region.A novel experimental method was introduced to measure the ductile fracture of Mg alloy wires under different stress states.The wire drawing process was simulated using the Generalized Incremental Stress-State dependent damage(GISSMO)Model and the Semi-Analytical Model for Polymers(SAMP)model.The damage model's prediction and the experimental results were found to be in excellent agreement,especially in determining crack initiation.Computational analysis established a safe zone diagram for die angle and reduction ratio,and experimental validation confirmed the feasibility of this approach.The proposed damage model can provide a practical and reliable analysis for optimizing the drawing process of Mg alloy wire. 展开更多
关键词 Mg alloy Wire drawing Finite element method Damage model Safe zone diagram
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CURDIS:A template for incremental curve discretization algorithms and its application to conics
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作者 Philippe LATOUR Marc VAN DROOGENBROECK 《虚拟现实与智能硬件(中英文)》 EI 2024年第5期358-382,共25页
We introduce CURDIS,a template for algorithms to discretize arcs of regular curves by incrementally producing a list of support pixels covering the arc.In this template,algorithms proceed by finding the tangent quadra... We introduce CURDIS,a template for algorithms to discretize arcs of regular curves by incrementally producing a list of support pixels covering the arc.In this template,algorithms proceed by finding the tangent quadrant at each point of the arc and determining which side the curve exits the pixel according to a tailored criterion.These two elements can be adapted for any type of curve,leading to algorithms dedicated to the shape of specific curves.While the calculation of the tangent quadrant for various curves,such as lines,conics,or cubics,is simple,it is more complex to analyze how pixels are traversed by the curve.In the case of conic arcs,we found a criterion for determining the pixel exit side.This leads us to present a new algorithm,called CURDIS-C,specific to the discretization of conics,for which we provide all the details.Surprisingly,the criterion for conics requires between one and three sign tests and four additions per pixel,making the algorithm efficient for resource-constrained systems and feasible for fixed-point or integer arithmetic implementations.Our algorithm also perfectly handles the pathological cases in which the conic intersects a pixel twice or changes quadrants multiple times within this pixel,achieving this generality at the cost of potentially computing up to two square roots per arc.We illustrate the use of CURDIS for the discretization of different curves,such as ellipses,hyperbolas,and parabolas,even when they degenerate into lines or corners. 展开更多
关键词 Computer graphics Curve discretization ConICS RASTERIZATIon Ellipse drawing Conic spline Conic pencil
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Research on the Reform of the Course“Reading of Concrete Structure Plan and Construction Drawings”Under the Background of“Promoting Teaching and Learning Through Competitions”
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作者 Guixiang Yu Xiaolong Tan 《Journal of Architectural Research and Development》 2023年第4期32-38,共7页
The inherent teaching approach can no longer meet the demands of society.In this paper,current issues within the teaching landscape of architectural engineering technology in higher vocational colleges as well as the ... The inherent teaching approach can no longer meet the demands of society.In this paper,current issues within the teaching landscape of architectural engineering technology in higher vocational colleges as well as the policies and teaching demands that formed the basis of this model were analyzed.The study shows the importance of the implementation of the teaching model“promoting teaching and learning through competitions.”This model puts emphasis on the curriculum and teaching resources,while also integrating the teaching process and evaluation with competition.These efforts aim to drive education reform in order to better align with the objectives of vocational education personnel training,while also acting as a reference for similar courses. 展开更多
关键词 Promoting teaching through competitions Promoting learning through competitions Reading of concrete structure plan method construction drawings Course reform
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Application of Midjournal and Stable Diffusion in Environmental Art and Design Courses in Higher Education Institutions
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作者 HAN Bing 《Journal of Landscape Research》 2024年第3期80-82,87,共4页
This study was aimed to explore the feasibility of introducing two mainstream AI drawing applications,Midjournal and Stable Diffusion,into the environmental art and design courses in higher education institutions.On t... This study was aimed to explore the feasibility of introducing two mainstream AI drawing applications,Midjournal and Stable Diffusion,into the environmental art and design courses in higher education institutions.On the basis of introducing the development history of AI drawing technology,the characteristics of Midjournal and Stable Diffusion and their applications in teaching were described in detail.The analysis on its practical application in public space design courses showed that AI drawing technology could significantly improve students’creative efficiency and the possibility of artistic creation,while also enriching the expressive power of design.In spite of the challenges such as technical accuracy,response to complex design requirements,hardware dependencies,and student dependencies,the application of AI drawing technology had an overall positive prospects in the field of education.Finally,the value of AI drawing technology in teaching was emphasized,and the challenges it brought were discussed,as well as how to fully utilize this technology while maintaining teaching objectives and educational principles. 展开更多
关键词 Artificial intelligence AI drawing Environmental art Teaching practice
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ON CHINESE MEDIA
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《China Today》 2024年第2期14-15,共2页
Cinderella National Ballet of China.Date:Febuary 2-4,2024.Venue:National Center for the Performing Arts.Rooted in romance and decorum,Cinderella is a tale of courage,hope,and heart that is suitable for audiences of al... Cinderella National Ballet of China.Date:Febuary 2-4,2024.Venue:National Center for the Performing Arts.Rooted in romance and decorum,Cinderella is a tale of courage,hope,and heart that is suitable for audiences of all ages.Founded in December 1959,the National Ballet of China has top-notch artistic personnel trained at professional art institutes and keeps drawing on the strengths of different art genres with Russian skills as its core.In addition to ushering in a high number of world classics,it has independently produced numerous masterpieces with distinct national characteristics,featureing an amazing fusion of the classical with the modern and the national with the international. 展开更多
关键词 China. PROFESSIonAL drawING
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Influence of drawing process parameters on forming of micro copper tube with straight grooves 被引量:4
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作者 汤勇 欧栋生 +2 位作者 万珍平 陆龙生 练彬 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第10期2264-2269,共6页
Using high-speed oil-filled spinning method,high quality micro copper tube with straight grooves(MCTSG) with an outer diameter of 6 mm was obtained.Then,MCTSG with an outer diameter of 3-6 mm was fabricated successf... Using high-speed oil-filled spinning method,high quality micro copper tube with straight grooves(MCTSG) with an outer diameter of 6 mm was obtained.Then,MCTSG with an outer diameter of 3-6 mm was fabricated successfully by multi-pass drawing processing method.The influence of drawing parameters on the forming of micro straight grooves was investigated based on the forming mechanism.The results show that the values of groove depth and width decrease,while the wall thickness increases as the drawing diameter decreases.At the same time,the groove depth and width increase,while the wall thickness decreases as the die angle increases.The drawing force increases as the reduction increases.Excessive copper tube reduction may results in groove folding and segmental teeth.The drawing force decreases firstly and then increases with the increases in die angle.When the die angle α is 16°,the drawing force is the smallest,indicating 16° is the optimal angle. 展开更多
关键词 micro-groove drawING drawing parameter drawing force heat pipe
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Texture evolution and its simulation of cold drawing copper wires produced by continuous casting 被引量:9
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作者 陈建 严文 +2 位作者 李巍 苗健 范新会 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第1期152-158,共7页
The texture evolution of cold drawing copper wires produced by continuous casting was measured by X-ray diffractometry and electron back-scatter diffractometry,and was simulated using Taylor model.The results show tha... The texture evolution of cold drawing copper wires produced by continuous casting was measured by X-ray diffractometry and electron back-scatter diffractometry,and was simulated using Taylor model.The results show that in the drawn poly-crystal copper wires produced by traditional continuous casting,111 and 100 duplex fiber texture forms,and with increasing strain,the intensities of 111 and 100 increase.In the drawn single-crystal copper wires produced by Ohno continuous casting,100 rotates to 111,and there is inhomogeneous distribution of fiber texture along radial direction of the wires,which is caused by the distribution of shear deformation.Compared with 100,111 fiber texture is more stable in the drawn copper wires.Comparison of the experimental results with the simulated results shows that the simulation by Taylor model can analyze the texture evolution of drawn copper wires. 展开更多
关键词 cold drawing copper wires TEXTURE Taylor model
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Sensitivity of springback and section deformation to process parameters in rotary draw bending of thin-walled rectangular H96 brass tube 被引量:8
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作者 朱英霞 刘郁丽 杨合 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第9期2233-2240,共8页
In order to study the effects of the process parameters on springback and section deformation, a sensitivity analysis model was established based on the combination use of the multi-parameter sensitivity analysis meth... In order to study the effects of the process parameters on springback and section deformation, a sensitivity analysis model was established based on the combination use of the multi-parameter sensitivity analysis method and the springback/section deformation prediction finite element model, and by using this model the sensitivities of the springback and the section deformation to process parameters were analyzed and compared. The results show that the most sensitive process conditions for springback angle are the boost speed and the pressure of pressure die, and the most sensitive process condition for section deformation is the number of cores. When the clamp force, the boost speed and the pressure of pressure die are utilized to control section deformation, the effect of these process parameters on springback should be considered. When the process parameters are mainly used to control springback, the effect of these process parameters on the section deformation should be always considered. 展开更多
关键词 thin-walled rectangular H96 brass tube rotary draw bending sensitivity analysis SPRINGBACK section deformation
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Effects of stress state on texture and microstructure in cold drawing-bulging of CP-Ti sheet 被引量:3
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作者 李宏伟 张下陆 +1 位作者 陈甲元 李金山 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第1期23-31,共9页
Three different stress states of the combination of tensile(t) stress and compressive(c) stress,t t,t c and t c c,exist in the deformed commercially pure titanium(CP-Ti) sheet during cold drawing-bulging.The tex... Three different stress states of the combination of tensile(t) stress and compressive(c) stress,t t,t c and t c c,exist in the deformed commercially pure titanium(CP-Ti) sheet during cold drawing-bulging.The textures and microstructures in the different stress state regions were investigated by means of XRD and TEM analysis.Similar development of texture and microstructure is achieved with less thickness strain under multiaxial stresses in drawing-bulging than in cold rolling.The results show that texture and microstructure are much sensitive to multiaxial stresses.Twinning is more easily activated under compressive stress than tensile stress.Prism a slip is heavily affected by tensile stress,resulting in a remarkable change of the intensity of(0°,35°,0°) texture,while pyramidal c+a slip,forming(20°,35°,30°) texture,weakens with the increase of thickness strain in spite of stress state. 展开更多
关键词 titanium alloy TEXTURE twinning MICROSTRUCTURE drawING stress state cold rolling drawing-bulging
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Application of ultra-smooth composite diamond film coated WC-Co drawing dies under water-lubricating conditions 被引量:5
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作者 沈彬 孙方宏 +2 位作者 张志明 沈荷生 郭松寿 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第1期161-169,共9页
A specific revised HFCVD apparatus and a novel process combining HFCVD and polishing technique were presented to deposit the micro-and nano-crystalline multilayered ultra-smooth diamond(USCD) film on the interior-ho... A specific revised HFCVD apparatus and a novel process combining HFCVD and polishing technique were presented to deposit the micro-and nano-crystalline multilayered ultra-smooth diamond(USCD) film on the interior-hole surface of WC-Co drawing dies with aperture ranging from d1.0 mm to 60 mm.Characterization results indicate that the surface roughness values(Ra) in the entry zone,drawing zone and bearing zone of as-fabricated USCD coated drawing die were measured as low as 25.7,23.3 and 25.5 nm,respectively.Furthermore,the friction properties of USCD films were examined in both dry sliding and water-lubricating conditions,and the results show that the USCD film presents much superior friction properties.Its friction coefficients against ball-bearing steel,copper and silicon nitride balls(d4 mm),is always lower than that of microcrystalline diamond(MCD) or WC-Co sample,regardless of the lubricating condition.Meanwhile,it still presents competitive wear resistance with the MCD films.Finally,the working lifetime and performance of as-fabricated USCD coated drawing dies were examined under producing low-carbon steel pipes in dry-sliding and water-lubricating conditions.Under the water-lubricating drawing condition,its production significantly increases by about 20 times compared with the conventional WC-Co drawing dies. 展开更多
关键词 CVD diamond coated drawing die ultra-smooth composite diamond(USCD) film friction properties water-lubricating drawing dry sliding water lubrication
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Flexible die drawing of magnesium alloy sheet by superimposing ultrasonic vibration 被引量:2
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作者 曹秒艳 李建超 +1 位作者 苑亚宁 赵长财 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2017年第1期163-171,共9页
Combining solid granule medium forming technology with ultrasonic vibration plastic forming technology, ultrasonic vibration granule medium forming (UGMF) technology was proposed. To reveal the effect of ultrasonic ... Combining solid granule medium forming technology with ultrasonic vibration plastic forming technology, ultrasonic vibration granule medium forming (UGMF) technology was proposed. To reveal the effect of ultrasonic vibration on flexible-die deep drawing, an ultrasonic vibration with a frequency of 20 kHz and a maximum output of 1.5 kW was on the solid granule medium deep drawing of AZ31B magnesium alloy sheet. The results revealed that ultrasonic vibration promotes the pressure transmission performance of the granule medium and the formability of the sheet. The forming load declines with the ultrasonic amplitude during the drawing process as a result of the combined influence of the "surface effect" and the "softening" of the "volume effect". 展开更多
关键词 ultrasonic vibration magnesium alloy sheet deep drawing solid granules
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Effects of tribological behavior of DLC film on micro-deep drawing processes 被引量:1
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作者 王春举 王传杰 +1 位作者 郭斌 单德彬 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第9期2877-2882,共6页
To decrease the size effects of friction in microforming, three kinds of surface coatings, such as diamond-like carbon(DLC), TiN and MoS2, were deposited on surfaces of dies with plasma based ion implantation and de... To decrease the size effects of friction in microforming, three kinds of surface coatings, such as diamond-like carbon(DLC), TiN and MoS2, were deposited on surfaces of dies with plasma based ion implantation and deposition(PBII D) method and magnetron sputtering technique, respectively. The tribological behavior of surface coatings was analyzed considering plastic deformation of specimen at contact interface. The analyses indicate that there is a lower coefficient of friction(COF) and a high wear resistance under the condition of large strain/stress when using the DLC film. The graphitization of DLC film occurs after 100 times of tests. The mechanism of graphitization was analyzed considering energy induced by friction work. The effects of DLC film properties on qualities of micro-deep drawn parts were investigated by analyzing the reduction of wall thickness, etc. The results indicate that DLC film is very helpful for improving the qualities of the micro-parts. 展开更多
关键词 micro-deep drawing diamond-like carbon film tribological behavior micro-cups GRAPHITIZATIon
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A Mapping Technique to Draw Resistivity Isocontours for Slice-of-Silicon Monocrystal 被引量:1
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作者 孙以材 潘国峰 +2 位作者 杨茂峰 叶威 张鹏 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2008年第7期1281-1285,共5页
A resistivity distribution with a space of 3mm between test points was measured on a slice-of-silicon monocrystal (diameter 75mm) using an inclined four-point probe. This paper has determined the number of resistivi... A resistivity distribution with a space of 3mm between test points was measured on a slice-of-silicon monocrystal (diameter 75mm) using an inclined four-point probe. This paper has determined the number of resistivity divisions and their separations by statistical methods and introduced fuzzy mathematics to place the data into different fuzzy sets, after choosing the exponent function as a membership function for fuzzy sets and suitable values of thresholds. One fuzzy set corresponds to one resistivity isocontour. Then,the resistivity isocontours can be drawn with a definite separation and fi- nally shown in a map with MATLAB. The deviation of resistivity data on an isocontour is small and there are few residual test points without connections. So, the connection of the isocontours are high-quality and useful in application for instructing practical production. 展开更多
关键词 mapping technique silicon monocrystal draw the resistivity isocontours
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基于Visio Drawing Control控件的图形化潮流计算软件开发 被引量:7
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作者 张鸿博 蔡晓峰 《华北水利水电学院学报》 2009年第1期70-72,共3页
针对VC,Delphi等工具开发电力系统分析计算软件图形可视化的缺陷,提出并研究了一种基于VisioDrawing Control图形控件,利用VC进行二次开发的图形化电力系统潮流计算软件开发的技术,研究了基于该控件的图形化建模方法及电网拓扑结构的自... 针对VC,Delphi等工具开发电力系统分析计算软件图形可视化的缺陷,提出并研究了一种基于VisioDrawing Control图形控件,利用VC进行二次开发的图形化电力系统潮流计算软件开发的技术,研究了基于该控件的图形化建模方法及电网拓扑结构的自动识别,开发了实用的电力系统图形化潮流计算软件.实践表明,基于Visio Drawing Control的二次开发技术为图形化电力系统潮流计算软件的开发提供了新的有效的途径. 展开更多
关键词 VISIO drawING Control 二次开发 图形化 潮流计算
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Effect of electropulsing on deformation behavior of Ti-6Al-4V alloy during cold drawing 被引量:10
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作者 周岩 陈国清 +1 位作者 付雪松 周文龙 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第4期1012-1021,共10页
Electron backscattered diffraction (EBSD) and transmission electron microscopy (TEM) were used to investigate effect of electropulsing on microstructure and texture evolution of Ti-6Al-4V during cold drawing. Rese... Electron backscattered diffraction (EBSD) and transmission electron microscopy (TEM) were used to investigate effect of electropulsing on microstructure and texture evolution of Ti-6Al-4V during cold drawing. Research results demonstrate that the electropulsing treatment (EPT) can enhance the deformability of the grains with unfavorable orientations, which makes the compatibility of deformation among grains much better. A comparison in texture evolution between conventional cold drawing and EPT cold drawing indicates that the EPT promotes prismatic 〈a〉 slip moving, restricts pyramidal 〈c+a〉 slip occurring and accommodates the deformation with c-component by grain boundary sliding. The fraction decrease of low-angle grain boundaries for samples deformed with EPT reveals that the application of electropulsing restricts the formation of the incidental dislocation boundaries and the geometrically necessary boundaries. 展开更多
关键词 Ti-6Al-4V alloy ELECTROPULSING cold drawing texture evolution
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Effect of friction coefficient in deep drawing of AA6111 sheet at elevated temperatures 被引量:7
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作者 马闻宇 王宝雨 +2 位作者 傅垒 周靖 黄鸣东 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第7期2342-2351,共10页
The effect of friction coefficient on the deep drawing of aluminum alloy AA6111 at elevated temperatures was analyzed based on the three conditions using the finite element analysis and the experimental approach.Resul... The effect of friction coefficient on the deep drawing of aluminum alloy AA6111 at elevated temperatures was analyzed based on the three conditions using the finite element analysis and the experimental approach.Results indicate that the friction coefficient and lubrication position significantly influence the minimum thickness,the thickness deviation and the failure mode of the formed parts.During the hot forming process,the failure modes are draw mode,stretch mode and equi-biaxial stretch mode induced by different lubrication conditions.In terms of formability,the optimal value of friction coefficient determined in this work is 0.15.At the same time,the good agreement is performed between the experimental and simulated results.Fracture often occurs at the center of cup bottom or near the cup corner in a ductile mode or ductile-brittle mixed mode,respectively. 展开更多
关键词 aluminum alloy deep drawing friction coefficient FORMABILITY fracture surface
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Influence of blank holder type on drawability of 5182-O aluminum sheet at room temperature 被引量:2
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作者 王游根 黄光胜 +4 位作者 刘定凯 陈琳 韩廷状 彭建 潘复生 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2016年第5期1251-1258,共8页
To study the influence of blank holder type on the drawability of 5182-O aluminum sheet at room temperature, the flat blank holder and curved blank holder were employed during the deep drawing process. The microstruct... To study the influence of blank holder type on the drawability of 5182-O aluminum sheet at room temperature, the flat blank holder and curved blank holder were employed during the deep drawing process. The microstructures were characterized by optical microscopy (OM). The results reveal that the limiting drawing ratio (LDR) of 5182-O aluminum alloy sheet is 1.7 using the flat blank holder. The drawn cup have severe earring. Compared with using flat blank holder, the LDR of 5182-O aluminum alloy sheet is enhanced to 2.0 using curved blank holder. In addition, the earring ratio also reduces and flange wrinkling is prevented when the curved blank holder is used. These are due to a more uniform sheet flow in different directions with curved blank holder. 展开更多
关键词 5182-O aluminum alloy deep drawing blank holder earring WRINKLING
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