快速成型和电弧喷涂相结合的快速制模技术研究

对快速成型和电弧喷涂相结合的快速制模技术的关键工序进行了实验研究、分析 ,如快速原型零件的制作、电弧喷涂材料的选择、电弧喷涂工艺参数的确定等 ,同时对这种快速制模方法的优缺点进行了阐述     

快速成型和电弧喷涂相结合的快速制模技术

对快速成型和电弧喷涂相结合的快速制模关键工序进行了实验研究和分析,包括原型零件快速制造、电弧喷涂材料选择、电弧喷涂工艺参数确定等;同时还对这种快速制模方法的优缺点进行了评价。     

金属电弧喷涂快速制模工艺的研究

金属电弧喷涂快速制模工艺,是近几年发展起来的新技术,在制造业中发挥了越来越重要的作用。通过对其制模工艺的研究,得出了最佳的工艺参数,展望了快速模具制造技术的发展前景。     

ASS电弧喷涂快速制模技术

ASS电弧喷涂快速制模技术,可大大缩短制模周期,其制模周期由几个月缩短到几天,提速产品开发,最大限度地适应市场竞争的需要。该技术广泛适用于各类简易快速模具制造,具有十分良好的经济效益。     

电弧喷涂制模技术的研究及应用

将电弧喷涂技术成功地运用到模具制作上,开辟了电弧喷涂技术应用的一个新领域,利用电弧喷涂制作具有周期短、费用低、效益高的显著特点,尤其对一些形状复杂、有各种装饰花纹的型腔模具理 明显的经济效益和实用价值。     

高熔点金属电弧喷涂快速制模工艺研究

综述了电弧喷涂快速制模技术的发展现状,分析了高熔点金属应用于电弧喷涂快速制模中存在的问题。通过实验研究,得出了在母模上铺设随形金属网、辅型喷涂、间隔喷涂和复合喷涂等方法,有效地将高熔点金属用于电弧喷涂快速制模,扩展了电弧喷涂快速模具的应用范围。     

电弧喷涂快速制模工艺及喷涂角度对模具性能的影响

电弧喷涂快速制模技术是基于原型的一种制模周期短、成本低、复制性能好的快速制模技术,是一种很有发展前途的快速制模技术。本文通过实验研究探讨了低温电弧喷涂快速制模工艺流程、母模材料、喷涂材料及各种工艺参数的选择,重点研究了喷涂角度对模具性能的影响。实验结果表明,喷涂角度的减小会导致模具致密度和硬度的下降、金属层的孔隙率增大,60°~90°的喷涂角度对性能影响不大,60°以下时,性能下降幅度明显增大。     

基于电弧喷涂和电刷镀的快速制模技术

提出了1种电弧喷涂和电刷镀一体化的快速制模技术 ,该技术采用电弧喷涂工艺在母模表面快速沉积一层致密的低熔点金属薄壳 ,从而制作出模具的型腔 ,然后采用电刷镀工艺在模具工作表面刷镀强化涂层 ,以显著提高模具表面的硬度和耐磨性。并介绍了电弧喷涂和电刷镀一体化快速模具制造设备 ,所述快速模具制造方法和设备用于汽车新车型开发和样车试制 ,可以显著降低开发成本、缩短试制周期     

电弧喷涂成型的快速制模技术

通过金属电弧喷涂成型快速制模技术在汽车覆盖件模具上的应用,论述了低熔点金属电弧喷涂模具制作的关键技术.     

基于LOM原型的电弧喷涂快速模具制造技术研究

介绍了基于LOM原型电孤喷涂快速模具制造的基本原理和流程，研究了LOM原型制造中的关键工艺，重点讨论了电孤喷涂快速制模的关键技术，为进一步开展此项技术的研究与应用打下了坚定的基础。     

Scientific, technological, and economic aspects of rapid tooling by electric arc spray forming

For the last seven years, Oxford University and Ford Motor Company personnel have been researching jointly the development of the large-scale spray forming of steel tooling capable for use in mass production, particularly for the pressing of sheet metal in automotive applications. These investigations have involved: the comprehensive microstructure and property studies, modeling of shape evolution and heat flow, realtime feedback control of tool temperature to eliminate tool distortion, high-speed imaging and particle image velocimetry of droplet deposition on three-dimensional (3D) shapes, testing of full-scale tools for different applications in the production environment, and detailed studies of the cost and time savings realized for different tooling applications. This paper provides an overview of the scientific and technical progress to date, presents the latest results, and describes the current state-of-the-art. Many of the insights described have relevance and applicability across the family of thermal spray processes and applications. This article was originally published inBuilding on 100 Years of Success, Proceedings of the 2006 International Thermal Spray Conference (Seattle, WA), May 15–18, 2006, B.R. Marple, M.M. Hyland, Y.-Ch. Lau, R.S. Lima, and J. Voyer, Ed., ASM International, Materials Park, OH, 2006.     

Comparison of aluminum coatings deposited by flame spray and by electric arc spray

Aluminum coatings are widely used as a protection against corrosion on steels substrates. Among the various deposition processes, thermal spray has proved to be a process that is easy to use and offers a long-lasting alternative in maintenance operations. Recent studies [Rodriguez, R.M.H.P. Formação de óxidos nos revestimentos de alumínio depositados por aspersão térmica. Curitiba-PR: ST, UFPR, 2003. Tese (Doutorado) -- Programa Interdisciplinar de Pós -- Graduação em Engenharia -- PIPE, Universidade Federal do Paraná, 2003. 118p; Paredes, R.S.C. Estudo de revestimentos de alumínio depositados por três processos de aspersão térmica para a proteção do aço contra a corrosão marinha. Florianópolis-SC:ST, UFSC, 1998. Tese (Doutorado) - Departameto de Engenharia Mecânica, Universidade Federal de Santa Catarina, 1998. 245p] demonstrated that the source and the gas used for aluminum spraying generate dissimilar corrosion protection behaviors. This paper purports to contribute toward a better understanding of the differences between the flame spray (FS) and electric arc (EA) processes. Initially, the coatings were analyzed by XPS (X-ray Photoelectron Spectroscopy), which revealed differences resulting from the deposition processes. To deepen the investigation into the differences relating to the heat source utilized, the coatings were subjected to a 4000-hour saline mist assay. The corrosion products formed on the surface of the coatings were evaluated based on photographic records, SEM, and X-ray diffraction. The XPS analysis of the aluminum coatings revealed that the aluminum oxide/hydroxide layer persisted at a greater depth in the coating deposited by EA than in that deposited by FS. This difference may also indicate the formation of different aluminum compounds. An analysis of the coatings subjected to the saline mist assay revealed clear differences in the corrosion products formed, which were strongly adherent in the FS coating and only slight adherent in the EA coating, leading to loss in thickness. X-ray diffraction revealed that the principal phase was bayerite in the FS process and boehmite in the coating deposited by EA. It should be noted that the heat source and the deposition material are determining factors in the protection process. In the period during which the coatings of this study were subjected to saline mist, both the FS and EA deposition methods provided satisfactory barrier protection.     

电弧喷涂复合电刷镀实验研究

研究了电弧喷涂复合电刷镀涂层、镀层表面形貌以及断面金相组织和镀层耐磨性,得出影响复合镀覆层质量的主要因素。针对脉冲频率以及电压等参数变化对镀层表面结合性能及耐磨性的影响进行了研究和分析。结果表明:经电弧喷涂后的低熔点金属模具可以提高使用寿命。     

机器人弧焊成形系统中离线自动编程

目前的机器人离线编程系统大多采用图形示教方式建立机器人运动路径,然而这种编程方式对于复杂路径来说工作量仍是相当大的,而且对于路径规划直接计算得出的机器人位置数据及弧焊操作指令无法方便地形成机器人程序(relative job,JOB).文中以弧焊机器人为对象进行了离线自动编程的研究.利用MOTOMAN机器人的相对JOB数据交换格式,实现了MOTOMAN机器人相对JOB的离线自动编程,自动生成机器人程序.离线自动编程模块通过ODBC接口从弧焊成形系统中相应的规划数据库取得指令代码及数据,充分发挥数据库的优势,有利于离线编程系统的扩展.结果表明,研究的离线编程运行稳定,机器人动作连贯,焊接路径与设计吻合.     

电弧喷涂枪的研究与设计

研究了喷涂电弧特点、喷嘴理论以及目前国内外最常用电弧喷涂枪的结构及其特点，提出了2种改进设计方案，最后介绍了电弧喷涂喷枪的最新发展状况。     

水下药芯焊丝焊接的工艺特点与研究进展

对国内外水下药芯焊丝焊接（ＦＣＡＷ）的研究成果进行了综述,介绍了水下药芯焊丝焊接的优点,工艺特点和研究现状,讨论了目前该焊接方法在实际应用中存在的困难及需要解决的问题,半提出了发展水下药焊丝焊接技术的几点建议,对未来药芯焊丝在水下焊接中的应用前景进行了展望。     

基于RP的电铸成形机的开发与应用

提出了基于RP技术的电铸EDM电极的工艺路线，详细介绍了电铸过程中的电化学原理及电铸制造EDM电极的工艺过程，针对电铸工艺特点。开发了DZ-400电铸成形机，重点解决了电铸工艺中的几项关键技术。     

金属电弧喷涂成型快速制模关键技术与应用

金属电弧喷涂成型制模技术是一种基于"复制"的制模工艺,与传统制模工艺相比,具有制模速度快、周期短、成本低等特点。金属喷涂模具由金属型壳、背衬强化层以及模框等构成,是一种具有梯度材料结构的复合材料模具。关键制模工艺包括:母模制备、金属型壳制造、模框制作、背衬强化层制作、脱模以及后处理等。金属喷涂制模技术可用于制造注塑模具、热成型模具和板料冲压模具等。该文以大型汽车覆盖件模具的快速制造为例进行了详细介绍。     

基于机器人CO2气体保护焊的直接堆焊成形研究

基于机器人CO2气体保护焊的堆焊成形技术,研究了焊接热输入对平板堆焊成形焊缝的熔宽及余高的影响规律,探讨了采用直接堆焊方法形成零件的可能性和影响因素,并对堆焊零件的残余应力进行了测试与分析,讨论了基于机器人CO2气体保护焊直接堆焊成形需要注意和改进的问题.