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Comparative Study on Shearing Edge Quality Influence of the Change of tool geometry in Fine-Blanking for Non-homogeneous Materials

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厦门大学学报（自然科学版） 2002年第S1期41卷 117-118页

作者： Y C Leung L C Chan T C Lee Department of Industrial and Systems Engineering the Hong Kong Polytechnic UniversityDepartment of Industrial and Systems Engineering the Hong Kong Polytechnic UniversityDepartment of Industrial and Systems Engineering the Hong Kong Polytechnic University Hong Kong ChinaHong Kong ChinaHong Kong China

Excellent quality of shearing edge implies that a s mo oth cutting edge without tearing will be observed on the whole edge surface. Thi s is one of the most significant features of the Fine-blanking process. To achi eve such a superb blanking edge quality in fine-blanking, there actually involv es quite a large number of factors, such as blanking speed, processing material, product shape, lubrication and tool geometry, to be considered simultaneously d uring the operation. Nevertheless, the thorough investigations on different effe cts of those critical factors for different kinds of popular and applicable mate rial are rare and limited. Thus, the objective of this paper is mainly focused o n the study of the quality influence of tool geometry change in fine-blanking f or non-homogeneous materials. However, the most obvious change of the tool geo metry during the operation will be the essential variation of the nose radius of the punch. This is because the nose radius usually seriously deteriorates with the increasing service period in mass production which eventually causes the ent irely lose of the specific features of the fine-blanking process. Therefore, a tailor-made experimental study was carried out to investigate the relationship between the punch nose radius and the shearing edge quality, such as blanked edg e finish, burr height and die-roll height, during fine-blanking for different types of material. Five punches with each specified nose radius (Rp), 0.00 mm, 0.25 mm, 0.50 mm, 0.75 mm and 1.00 mm, and four kinds of blanking material ( Mil d steel SS400, Stainless steel AISI316L, Copper alloy UNSC16200 and Aluminium al loy AA6063 ) were employed throughout the study. Subsequently, features of the s heared edge surfaces and data of each experiment were observed and captured for further analysis in this research. Consequently, findings show that an increase of punch nose radius would produce a higher percentage of fracture of blanked ed ge and increase the

关键词： fine-blanking tool geometry shearing edge qual ity

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The interaction between grain boundary and tool geometry in nanocutting of a bi-crystal copper

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International Journal of Extreme Manufacturing 2019年第4期1卷 12-22页

作者： Zhanfeng Wang Tao Sun Haijun Zhang Guo Li Zengqiang Li Junjie Zhang Yongda Yan Alexander Hartmaier Center for Precision Engineering Harbin Institute of TechnologyHarbin 150001People’s Republic of China Research Center of Laser Fusion China Academy of Engineering PhysicsMianyang 621900People’s Republic of China Interdisciplinary Centre for Advanced Materials Simulation Ruhr-University BochumBochum44780Germany

Anisotropy is one central influencing factor on achievable ultimate machined surface integrity of metallic ***,grain boundary has a strong impact on the deformation behaviour of polycrystalline materials and correlated material removal at the *** the present work,we perform molecular dynamics simulations and experiments to elucidate the underlying grain boundaryassociated mechanisms and their correlations with machining results of a bi-crystal Cu under nanocutting using a Berkovich ***,crystallographic orientations of simulated bi-crystal Cu with a misorientation angle of 44.1°are derived from electron backscatter diffraction characterization of utilized polycrystalline copper *** results reveal that blocking of dislocation motion at grain boundaries,absorption of dislocations by grain boundaries and dislocation nucleation from grain boundaries are operating deformation modes in nanocutting of the bi-crystal ***,heterogeneous grain boundary-associated mechanisms in neighbouring grains lead to strong anisotropic machining behaviour in the vicinity of the grain *** machined surface morphology and machining force evolution in the vicinity of grain boundary qualitatively agree well with experimental *** is also found that the geometry of Berkovich tool has a strong impact on grain boundary-associated mechanisms and resultant ploughing-induced surface pile-up phenomenon.

关键词： nanocutting grain boundary tool geometry surface integrity molecular dynamics

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INVESTIGATION OF TURNING tool SYSTEM WITH ON-LINE tool geometry ADJUSTMENT

INVESTIGATION OF TURNING TOOL SYSTEM WITH ON-LINE TOOL GEOME...

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International Technology and Innovation Conference 2006

作者： WU Wenge, LIU Zhanqiang, CHENG Yunping College of Mechanical Engineering and Automatization, North University of China, Taiyuan 030051, China School of Mechanical Engineering, Shandong University, Jinan 250061, China

＜正＞Metal cutting is one of the most important methods of removing unwanted material in the production of mechanical components. The tool geometry such as rake angles and cutting edge inclination angles play significant roles in determining machining performance. Varying these angles directly affects effects of machining parameters such as cutting forces, cutting temperatures, tool wear, tool life, surface integrity, dimensional stability. The necessity and possibility of the on-line geometry adjustment of turning tools are investigated in this paper. A brief design of a device facilitating this on-line geometry variation is described. Based on the ’classical’ oblique cutting operation, analytically simulated prediction of the tangential cutting forces were presented with MATLAB software. A new turning tool mechanism having the function of intelligent in-process controllability in changing the tool inclination angle and tool approach angle.

关键词： tool geometry turning tool cutting tool system simulation

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INVESTIGATION OF TURNING tool SYSTEM WITH ON-LINE tool geometry ADJUSTMENT

INVESTIGATION OF TURNING TOOL SYSTEM WITH ON-LINE TOOL GEOME...

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2006年中国机械工程学会年会暨中国工程院机械与运载工程学部首届年会

作者： WU Wenge*, LIU Zhanqiang , CHENG Yunping* * College of Mechanical Engineering and Automatization, North University of China, Taiyuan 030051, China School of Mechanical Engineering, Shandong University, Jinan 250061, China

Metal cutting is one of the most important methods of removing unwanted material in the production of mechanical components. The tool geometry such as rake angles and cutting edge inclination angles p

关键词： tool geometry turning tool cutting tool system Simulation.

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Point-based tool representations for modeling complex tool shapes and runout for the simulation of process forces and chatter vibrations

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Advances in Manufacturing 2018年第3期6卷 301-307页

作者： P. Wiederkehr T. Siebrecht J. Baumann D. Biermann Institute of Machining Technology TU Dortmund University Dortmund Germany Virtual Machining Department of Computer Science TU Dortmund University Dortmund Germany

Geometric physically-based simulation systemscan be used for analyzing and optimizing complex millingprocesses, for example in the automotive or aerospaceindustry, where the surface quality and process efficiencyare limited due to chatter vibrations. Process simulationsusing tool models based on the constructive solid geometry（CSG） technique allow the analysis of process forces, tooldeflections, and surface location errors resulting from five-axis machining operations. However, modeling complextool shapes and effects like runout is difficult using CSGmodels due to the increasing complexity of the shapedescriptions. Therefore, a point-based method for modelingthe rotating tool considering its deflections is presented inthis paper. With this method, tools with complex shapesand runout can be simulated in an efficient and flexibleway. The new modeling approach is applied to exemplarymilling processes and the simulation results are validatedbased on machining experiments.

关键词： Modeling tool geometry Milling

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Review on friction stir welding of magnesium alloys

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Journal of Magnesium and Alloys 2018年第4期6卷 399-416页

作者： Kulwant Singh Gurbhinder Singh Harmeet Singh I.K.Gujral Punjab Technical University KapurthalaPunjabIndia Guru Kashi University Talwandi SaboPunjabIndia

Friction Stir Welding(FSW)is considered to be the most significant development in metal joining in last two *** has many advantages when welding magnesium or lightweight *** Friction stir welding of magnesium alloy has many potential applications in major industries *** transportation,aerospace,railway,shipbuilding and marine,construction,and many other industrial *** magnesium alloys have been used in industrial equipment of nuclear energy as magnesium alloys have low tendency to absorb neutrons,sufficient resistance to carbon dioxide and excellent thermal ***,the research and development in FSW field and associated technologies have been developing rapidly *** this review article,the basic principle of friction stir welding and several aspects of friction stir welded magnesium alloys have been *** current state of friction stir welding of magnesium alloys is *** spite of this,much remains to be learned about the process and opportunities for further research are identified.

关键词： FSW tool geometry Stir Zone Mg Alloy Texture Microhardness.

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