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Conception of tooling adapted to thixoforging of high solid fraction hot-crack-sensitive aluminium alloys G. VANEETVELD1, A. RASSILI1, J. C. PIERRET1, J. LECOMTE-BECKERS2 1. Thixo Unit, B56...-solid state. Tooling has to be adapted to this particular process to benefit shear thinning and thixotropic behaviour of such semi-solid material. Tooling parameters, such as the forming speed and tool......
Inconel 617 and Stellite 6 alloys for tooling in thixoforming of steels Y. BIROL Materials Institute, Marmara Research Centre, TUBITAK, Gebze, Kocaeli 41470, Turkey Received 13 May 2010... spalling and are claimed to be responsible for the superior wear resistance of these alloys at 750 °C. Key words: steel; thixoforming; tooling; thermal fatigue; wear 1 Introduction Lack of suitable......
Trans. Nonferrous Met. Soc. China 20(2010) s1022-s1028 AlTiN and AlTiON-coated hot work tool steels for tooling in steel thixoforming Y. BIROL1, D. ISLER2 1. Materials Institute.... The improved wear resistance is attributed to the stable, protective surface oxide films. Key words: thixoforming; physical vapor deposition; coating; tooling; steels; thermal fatigue; wear 1 Introduction......
Application of direct laser metal tooling for AISI H13 tool steel Hee-Jin JEONG1, Yoong-Ho JUNG2, Deug-Woo LEE3 1. Gyeongbuk Hybrid Technology Institute, Gyeongbuk, 770-170, Korea; 2. School of Mechanical Engineering, Pusan National University, Busan, 609-735, Korea; 3. Department of Nanosystem and Nanoprocess Engineering, Pusan National University, Busan, 609-735, Korea Received 2 March......
Pfeifer Institute for Polymer Testing and Polymer Science, IKP-University of Stuttgart, Germany) 摘要:Rapid tooling is the process of directly or indirectly employing rapid prototyping technologies in tool and mold fabrication. By combining rapid tooling and temperature induced forming (TIF) a novel near-net shape process for the rapid production of complex-shaped prototypes of advanced ceramics......
基于MSC Nastran的无人机复合材料机翼有限元分析 孙幼红1 (1.南京晓庄学院,南京,211171) 摘要:本文介绍了硅橡胶模具的制作方法,探讨了硫化时间与固化剂用量对硅橡胶硫化程度的影响,解释了硫化程度与硅橡胶模具寿命之间的关系;探讨了硅橡胶在几种不同材质表面的脱模性;探讨了模具制作过程中固化剂和硅油用量对模具质量的影响,并给出了适宜的固化荆用量;探讨了稀释剂用量与种类对硅橡胶模具质量的影响,并指出二甲基硅油是合适的稀释剂;探讨了硅橡胶模具发生膨胀的原因,指出其膨胀的本质是溶剂对硅橡胶的溶胀,并给出了减小溶胀的应对措施. 关键词:快速原形技术; 快速模具; 模具硅橡胶; 不饱和聚酯; rapid prototyping; rapid tooling; molded silicone rubber; unsaturated polyester; [全文内容正在添加中] ......
新型液压伸缩起重机王家骧摘 要:<正> 美国 Iowa Mold Tooling 公司展示了它的最新产品-新型7020液压伸缩起重机.这是为21/2t 或更大的现场服务汽车设计的.7020车装起重机搬运能力从6350kg,0.91m 到1542kg,6.2m.标准起重机的特征包括遥控,450°回转,液压悬臂,起重臂仰角在水平以上80°的关键词:......
电弧喷涂快速成形技术研究现状 陈永雄1,徐滨士1,梁秀兵1,刘燕1 (1.装甲兵工程学院,装备再制造技术国防科技重点实验室,北京,100072) 摘要:电弧喷涂成形是新近发展起来的一项重要金属快速成形技术.对比分析电弧喷涂快速成形技术与近终喷射成形和等离子喷涂成形技术之间的差异与特点,综述电弧喷涂在模具快速制造领域的研究应用现状,并讨论了电弧喷涂成形材料,以及喷涂成形雾化与沉积工艺过程中的传热传质,残余应力和氧化行为等关键性问题.最后,展望了电弧喷涂厚成形技术的重点研究方向与解决途径. 关键词:电弧喷涂成形; 模具; 快速成形; 金属涂层; 内聚结合强度; arc spray forming; tooling; rapid prototyping; metal coating; cohesive strength; [全文内容正在添加中] ......
微弧氧化陶瓷层对铝基快速模具材料性能的影响 张文达1,马薇1,赵建华1 (1.重庆大学,材料科学与工程学院,重庆,400045;2.国家镁合金材料工程技术研究中心,重庆,400045) 摘要:研究了微弧氧化(MAO)技术对铝基快速模具进行表面改性的问题.针对金属型铸造用模的特殊要求,主要对MAO表面改性层的热疲劳性能以及表面改性层对熔体流动性的影响进行了的研究.结果表明,经过MAO处理的模具型腔对提高熔体充型能力有利,且表面改性层厚度越厚,熔体流动性越好.热疲劳性能试验表明MAO表面改性层比一般涂料涂层热疲劳循环寿命延长了许多. 关键词:快速模具; 铝合金; 陶瓷改性层; 微弧氧化; rapid tooling; aluminum alloy; ceramic layer; micro-arc oxidation; [全文内容正在添加中] ......
热压罐工艺的成型压力对框架式模具温度场的影响 梁宪珠1,王永贵1 (1.北京航空制造工程研究所飞机工艺研究室,北京,100024) 摘要:从理论分析入手,结合工程实验研究了在热压罐工艺中成型压力改善框架式模具温度场分布的均匀性和缩短热历程升温阶段时间. 关键词:热压罐工艺; 成型压力; 框架式模具; 温度场; autoclave technics; molding pressure; frame tooling; temperature field; [全文内容正在添加中] ......
