【作者】 哈津；

【导师】 易树平；

【作者基本信息】 重庆大学 ， 机械制造及其自动化， 2002， 硕士

【摘要】 现代科学技术的飞速发展带动了各种新的制造技术和制造模式的出现。快速原型与制造技术（RP/M）正是其中之一。经过近二十年迅猛发展，RP/M的研究应用领域扩大到汽车、机械行业，要求以制造具有实际功能的最终用途机械零件为目标。目前，利用各种金属作造型材料的研究与开发已经成为国内外RP/M研究新的热点。本文提出薄金属板作造型材料分层快速制造金属功能零件，并做了相关的课题研究。在课题先期研究基础上，本文提出以1mm厚金属板材作为造型材料，用LOM的方法制造金属功能零件，并指出金属分层板的连接技术仍是需迫切解决问题之一。本文提出了用真空固态热扩散焊接工艺连接金属分层板的方法。通过两个主要的实验研究测定了试样在堆积成形方向上的尺寸变化、试样结合面的显微结构、显微硬度以及剪切强度，研究探讨了用热扩散焊接方法连接金属分层板的可行性。实验结果表明真空固态热扩散焊接是一种比较理想的金属分层板连接方法。本文应用热扩散焊接研究成果和新LOM方法制作了样模。宏观观测表明，其各个曲面外观光滑，分层板之间过渡均匀，没有明显的台阶效应。通过误差评定可知，在本论文的手工制作、未采取特别措施提高加工精度的条件下，样模的最大加工误差为0.485mm，而绝大多数分层板的误差都小于0.3mm。样模制作的结果证实了新LOM方法对降低造型误差的有效性及扩散焊接用于实际金属零件制造的可行性。本文还针对减小样模制造误差而分析了产生误差的原因，为课题的后续研究--提高样模加工精度提供了思路。更多还原

【Abstract】 The modern science and technology change with each passing day, and the traditional manufacturing is facing new challenge and new chance. And this brings along some new sorts of manufacturing technologies, for example Rapid Prototype and manufacturing (RP/M for short). RP/M is a revolutionary breakthrough using modern science and technology into the manufacturing field.After more than 20 years’ rapid developing, RP/M is now used in the manufacturing of automobile and machine manufacturing. It is required to target the final function metal part instead of the model part or nonmetal part. By now, the research of RP/M has been the focus of the research that used the metal as modeling materials. In this paper, the metal powder and foil, which used in some of researches, hasn’t been used. On the contrary, the low-cost and common thin sheet metal as modeling materials is presented.In this paper, based on the previous study on this project, a thought, which used 1mm thick metal sheet as modeling materials to fabricate the final function metal part according to the New LOM process, is advanced. And also a question, the joining process of metal sheet, is indicated.A process connecting metallic slice sheet by diffusion welding is also put forwarded in this dissertation. And two experiments are executed in order to prove the feasibility this process. The change of size in the stack direction, the micro hardness and shearing intension are measured. The microstructure of specimens welded by diffusion binding is also observed. All these indicate that diffusion binding technique is available approach for connecting the metallic slice sheet.An experimental sample made by new LOM process and diffusion welding process is presented. The surface of the sample parts is smooth, and no obvious stair-step can be observed. The measurement of sample shows that maximum manufacturing error is 0.485mm and the most error value is less than 0.3mm in the conditions that no any specific processes are used when by handwork manufacturing. The results above show that the New LOM methods are effective both theoretically and practically.更多还原