【作者】 李国兵；

【导师】 朱小东；

【作者基本信息】 湖南工业大学 ， 机械设计及理论， 2008， 硕士

【摘要】 随着生活质量和欣赏水平的提高,人们对新产品的追求越来越强烈,使得现在市面上的产品更新换代越来越快。为了满足顾客的需求,提升企业的竞争力,企业的产品正在向小批量、多样化、高质量的方向发展。而现代工业品的开发和技术水平的提高在很大程度上取决于模具制造技术的发展,这使得模具的设计与制造必须尽可能的缩短周期,不断降低开发成本。快速成形技术给模具的设计与制造带来了一次飞跃。由于快速成形技术的应用,加上此基础上的快速制模技术的发展,使模具的设计与制造逐步趋向于数字化、快速化,“基于快速原型的电铸成形模具技术”能满足模具制造的新要求。电铸工艺具有极高的复制精度,能精确的复制出金属型腔;分层实体制造(LOM)是国内推广较早、技术较成熟且成本较低的原型制造方法,研究如何更好地把二者结合起来生产金属模具,对模具技术的发展具有深远的影响。本文首先分析影响硫酸铜溶液电铸制造铜模的因素并对主要参数进行正交实验,得到了生产高质量铜模较优的技术参数。试验条件与工厂实际生产条件相同,所研究的成果对企业有更真实的指导价值。由于LOM原型直接电铸需要复杂的前期处理,本课题避开直接用其作为电铸载体,而是经过更适合的材料翻制转换,得到合适的电铸载体,使电铸质量更高。本文还对深孔电铸进行了初步的实验研究,总结了金属在深孔中沉积的规律,提出深孔可电铸径深比的最小极限是24%,探讨了深孔电铸中质量问题的解决方案。本文提出了LOM原型+吸塑壳型+涂覆铜粉再电铸的快速制模的新工艺。为了检验研究成果,该技术成功应用于青岛纸塑制品有限公司太阳能管的内包装模具生产上,并批量生产产品。结果表明该新工艺是完全适合市场需求和企业实际利益的。更多还原

【Abstract】 With the development of life quality and appreciation level, the pursuance for the new products is becoming keener, which causes the products innovation to be more and more quickly in the present. The requirement of customer’s and product competitiveness are leading the modern manufacturing to the development of low volume, multi-types, high quality, low cost and promptly market responding. The development of mould has become more and more important, which makes the design and fabrication period of mould must be shorted and its cost must be cut down.Rapid prototyping is a leap in the design and manufacture mould field and, with its extensive application and the development of rapid tooling, which makes the design and manufacture of mould to the development of digitalization and rapidity. However, electroforming which based on rapid prototyping can satisfy these requirements. Furthermore, electroformed moulds are very precise, and it can copy the exterior accurately. In addition, LOM is one of manufacturing methods and it has put in use for a long time, technical perfection and low coat. The research for combining the two technologies has important significance.The quality of electrochemical deposit layer is influenced by many factors. In this paper, the experimental and technological factors of arc spraying copper were carried through. The main factor and the optimum parameters for archive the best properties of the electroformed layer of cooper were obtained. The research under the condition of product line had also implemented. Therefore, the results are more valuable to corporation. Avoid using the rapid prototype as electroforming carrier due to its insufficiency, and we copy the exterior using the more proper material to keep the precision. Take account for the electroforming of deep hole for finding out the rule and its result shown that the limit electroform aperture ratio of deep hole is 24%, furthermore, the method of resolving the problems in manufacture are obtained.A new technique of consisting of LOM, plastic-absorbing shape process and covering with copper powder has demonstrated. In order to validate the above experimental conclusions, the mould of solar tube’s inner packaging was fabricated by electroforming. Molded pulp products were produced by using this mould. In a word, the new technique is accord with the demand of market and benefits of enterprise.更多还原