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镁合金的塑性加工技术 总被引:36,自引:1,他引:36
分析了镁合金的塑性变形特点及应用前景,阐述了镁合金塑性加工研究现状及在材料,性能和加工制造方面的发展方向,分析了镁合金挤压,锻造,冲压,胀形等变形特点及工艺关键。讨论了镁合金的各种加工性能和环境影响,总结了镁合金塑性加工技术的最新进展。 相似文献
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镁合金作为21世纪绿色工程金属结构材料,必将成为汽车、摩托车等交通工具、计算机、通讯、仪器仪表、家电、轻工、军事等行业的重要选材.镁合金板料冲压加工技术已成为有关领域研究的热点,设计镁合金板料热成形成套装置很有意义.本文对镁合金板料加热系统原理和结构以及热冲压模具的加热系统进行了研究,设计了镁合金板料热成形用的整套试验装置,并利用该装置进行了镁合金板料成形的有关试验,得出了一些初步结论.成套装备的开发为镁合金板料热冲压成形的深入研究奠定了基础. 相似文献
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毛坯设计在汽车板料冲压成形工艺设计中起重要作用,它直接影响工件的成形性.一步法将板料成形过程简化为一个简单加载的变形过程,并采用全量理论分析初始状态和变形终了构形.结合塑性变形理论和有限元技术,直接由工件反算出毛坯.并以某汽车的前门窗框加强板冲压成形为例,通过一步法获得初始毛坯的形状及尺寸,验证了一步法的快速性与准确性. 相似文献
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冲压弯曲成形是金属材料件加工的常用方法。它是靠冲压设备和模具对金属毛坯件进行弯曲,冲压弯曲成形实质上也就是在不加温的条件下,对毛坯施加外力,不改变产品的材料性能,使之发生塑性变形或者分离,从而获得一定尺寸、形状和性能的工件的加工方法。 相似文献
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提出基于固体颗粒介质成形(SGMF)工艺的镁合金板材差温拉深工艺,并展开试验研究。通过对AZ31B镁合金薄板进行差温拉深成形试验,研究了成形温度、拉深速度、压边力、压边间隙、凹模圆角和润滑条件对拉深性能的影响,确定AZ31B镁合金板料最佳成形工艺参数。结果表明:该工艺可显著提高镁合金板材的成形性能,成形温度及拉深速度对板料拉深性能影响较大,板料最佳成形温度区间为290~310℃,颗粒介质与板料理想温差为110~150℃;压边力和压边间隙对拉深性能产生联合影响;此外,凹模圆角和润滑条件也对拉深性能有一定的影响。当上述工艺参数达到最佳值时成功拉深出极限拉深比(LDR)为2.41的工件。 相似文献
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有色金属板材若干温热加工成形技术的发展 总被引:1,自引:0,他引:1
介绍了有色金属材料加工先进新技术国内外发展和应用概况,包括近年来关于镁合金、钛合金、铝合金等典型有色金属材料领域出现的先进塑性成形技术,尤其温热加工成形技术。在镁合金板材冲压成形领域,介绍了镁合金板材温热冲压成形、差温冲压成形、温热液压成形和热冲锻成形以及镁合金型材温热拉弯成形等新工艺技术,为镁合金板材在汽车、电子、机车车辆等领域的应用奠定了技术基础。钛合金板材零件的热应力成形、热胀形成形、激光弯曲成形、高温蠕变成形技术都得到了发展和应用。随着铝合金的进一步应用和发展,一些低塑性难成形高强铝合金的用量在增加,应用领域在扩展。因此铝合金的温热液压成形、冲锻成形都有所发展。 相似文献
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A review of spinning, shear forming and flow forming processes 总被引:7,自引:0,他引:7
C. C. Wong T. A. Dean J. Lin 《International Journal of Machine Tools and Manufacture》2003,43(14):2891
In the last two decades or so, spinning and flow forming have gradually matured as metal forming processes for the production of engineering components in small to medium batch quantities. Combined spinning and flow forming techniques are being utilised increasingly due to the great flexibility provided for producing complicated parts nearer to net shape, enabling customers to optimise designs and reduce weight and cost, all of which are vital, especially in automotive industries.In this paper, process details of spinning and flow forming are introduced. The state of the art is described and developments in terms of research and industrial applications are reviewed. Also, the direction of research and development for future industrial applications are indicated. 相似文献
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Steven Woodward Christian Weddeling Glenn DaehnVerena Psyk Bill CarsonA. Erman Tekkaya 《Journal of Materials Processing Technology》2011,211(5):886-895
Electromagnetic forming is commonly used to produce high strain rates to improve the formability of sheet metal. The objective of this paper is to discuss the feasibility of the use of disposable actuators during electromagnetic forming of two aluminum components: a very simple part with a one-dimensional curve, and a realistic part whose main feature is a convex flange with two joggles. The main forming complications after the parts were formed using conventional methods were the presence of wrinkles and excessive springback. The goal of this work is to use large controlled electromagnetic impulses to minimize the springback of these components from a rough-formed shape. The optimum test protocols for electromagnetic calibration of the components were determined by optimizing parameters such as actuator design, tool material, press force, and capacitor discharge energy. The use of disposable actuators for electromagnetic calibration of the parts showed significant reductions in springback compared to the parts which were only preformed using conventional techniques (hydroforming and rubber pad forming). Springback was decreased in the curved component by up to 87%. The wrinkles were eliminated on the flanged component, the joggles were formed properly, and the average bending angle of the part was improved from 95.3° to 90.3°, very near the target bending angle of 90°. This study demonstrates that these techniques can be used to improve current sheet metal production processes. 相似文献
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Rapid manufacturing of metal components by laser forming 总被引:11,自引:0,他引:11
Edson Costa Santos Masanari Shiomi Kozo Osakada Tahar Laoui 《International Journal of Machine Tools and Manufacture》2006,46(12-13):1459-1468
This overview will focus on the direct fabrication of metal components by using laser-forming techniques in a layer-by-layer fashion. The main driving force of rapid prototyping (RP) or layer manufacturing techniques changed from fabrication of prototypes to rapid tooling (RT) and rapid manufacturing (RM). Nowadays, the direct fabrication of functional or structural end-use products made by layer manufacturing methods, i.e. RM, is the main trend. The present paper reports on the various research efforts deployed in the past decade or so towards the manufacture of metal components by different laser processing methods (e.g. selective laser sintering, selective laser melting and 3-D laser cladding) and different commercial machines (e.g. Sinterstation, EOSINT, TrumaForm, MCP, LUMEX 25, Lasform). The materials and applications suitable to RM of metal parts by these techniques are also discussed. 相似文献
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分析了四侧壁料厚相互重叠的门锁扣加强板的成形工艺 ,提出了差动成形原理及顺序弯曲成形方法。介绍了成形模具的设计技巧、成形模结构特点及设计关键要求。 相似文献
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