-
设计总说明：四年的大学生活即将结束了，在这段时间里我们多多少少学到了一些知识，但没有很好的连贯起来，而毕设让我们认识到了这一点。毕业设计是大学本科教学计划中最后一个重要的教学环节，是对自己所学的板带材基础理论知识的综合，也是进行板带材产品设计或科学研究的综合训练，是对四年所学知识的系统的完善，是培养自身综合素质
- 上一篇：铋系光催化材料的制备及其性能研究
- 下一篇：氧化铝陶瓷凝胶注模成型研究+文献综述
和产品生产实践能力的重要阶段，是必不可少的综合训练。
本课题为《锌白铜带的产品工艺设计及其产品缺陷和防止措施》，该设计主要结合国内外的铜板带材的现状、消费量及市场需要，生产一批0.6*200mm,巻重3500kg的锌白铜带。以镍为主要合金元素的铜合金称为白铜,在铜-镍合金中加入第三元素锌即形成锌白铜。锌白铜为银白色，锌白铜带色泽美观，延展性、抗疲劳性、抗腐蚀性均佳，优良的冷热加工性、高弹性及电学性能和力学性能， 因而应用广泛，易切削，可制成线材、棒材和板材，屏蔽等性能，是移动通讯工具(手机、小灵通)及电子器件的优良屏蔽材料。广泛应用于制造在潮湿和腐蚀介质中工作的结构件、弹性元件、精密仪器、通讯工业、液晶体 造成的成品改制、报废、退货数量相当惊人,已成为企业产品质量的制约因素之一。在实际使用过程中,需要严格控制其生产过程。其型号有BZn15-20、BZn18-18、BZn18-26、BZn18-18、BZn15-12（Zn）-1.8（Pb）、BZn15-24（Zn）-1.5（Pb）。结合资料的综合，我选定的是BZn15-20（其含Ni：15%，Zn:20%，Cu：65%）。
在中铝铜业有限公司的基础上，选择合适的生产工艺和主辅设备，首先制定熔炼工艺，根据锌白铜带的成分比和熔炼时的烧损量及旧料的投放，进行配料，算出其主要成分的投放量，接着制定变形制度，其中包括压下制度、速度制度、张力制度及辊型制度（由于冷轧，所以无温度制度）；利用VB程序计算轧制力（由于是冷轧，计算时采用斯通公式）、轧制力矩和电机抽上的总力矩；并针对二辊和四辊轧机进行轧辊强度、四辊轧机机架强度和辅助设备能力的校核；其次对车间主要技术的考核（包括成品率的计算和轧机小时产量）。同时采用CAD画出轧辊图、车间布置图及各轧辊的弯矩图和轧制节奏图。8512
据目前的调查，生产过程中由于产品的一些缺陷（合金化学成分、铸造工艺、化学作用等）而造成成品率的大大降低，因而根据课题我做了相关的缺陷调查，并研究出各缺陷的成因和控制、防止措施，以提高产品的成品率，来满足市场的需求。
关键词： 锌白铜带、产品设计、缺陷、防止措施
General description of the design： Four years of college life coming to an end, and during
this time we have more or less learned some knowledge, but not well coherent and complete set
allows us to recognize this. Graduation is the last undergraduate teaching program is an important teaching is learned on their own plate and strip integrated basic theoretical knowledge, but also for sheet and strip integrated product design or scientific training is four years learning perfect knowledge of the system, is to develop their overall quality and product capacity of an important stage of production practices, comprehensive training is essential
The topic is "zinc-nickel alloy with product process design and product defects and prevention measures", which primarily designed to combine the copper strip situation, consumption and market needs, producing a number of 0.6 * 200mm, weight 3500kg of Volume nickel silver strips. As the main alloying elements nickel copper alloy called nickel alloy, copper - nickel alloy that is added to the third element in the formation of zinc and zinc-nickel alloy. Nickel silver is silver white, zinc-nickel alloy with beautiful color, ductility, fatigue resistance, corrosion resistance are good, excellent cold workability, high elasticity and electrical properties and mechanical properties, which are widely used, easy cutting, it can be into a wire, rod and plate, shielding and other properties, is a mobile communication tools (mobile phones, PHS) and electronic devices excellent shielding materials. Widely used in manufacturing in wet and corrosive media work structure, elastic components, precision instruments, communications industry, liquid crystal caused by the restructuring of the finished product, scrap, returns the number of quite amazing, the quality of products has become one of the constraints. In actual use, the need for strict control over its production process. The models are BZn15-20, BZn18-18, BZn18-26, BZn18-18, BZn15-12 (Zn) -1.8 (Pb), BZn15-24 (Zn) -1.5 (Pb). Integrated with the data, I decided the BZn15-20 (it contains Ni: 15%, Zn: 20%, Cu: 65%).