气缸端盖压铸模设计精要.doc

气缸端盖压铸模设计 学 生：xx 指导老师：xxx 三峡大学机械与材料学院 摘 要：低压铸造具有铸件尺寸精度较高充型平稳易获得优质铸件以及后续加工量少节能降耗等许多优点,已成为生产汽车铝合金铸件的重要工艺,是缸盖铸造生产的发展趋势低压铸造生产铝合金缸盖在中国刚刚起步,目前还没有非常成熟的低压铸造生产铝合金缸盖的理论和技术,因而对铝合金气缸盖低压铸造技术进行研究具有重要的工程应用价值,对中国的工业的快速发展也具有重要的意义首先,结合低压铸造及缸盖本身的结构特点质量要求,对缸盖进行模具结构设计及工艺系统设计进行研究,包括:模具整体结构的确定模具分型面的确定以及模具外形尺寸的确定原则模具壁厚与金属型的热平衡之间的关系铸件的浇注系统的设定内浇口截面积的计算冷却系统的设置各种排气方法的应运砂芯的定位以及砂芯射口的确定等内容 本文介绍了铝合金带轮低压铸造的实际试生产过程:制芯、熔化、浇注、清理及后处理等以及各环节中需要注意的问题。并提出缸盖低压铸造中主要的质量控制点,如:缩孔与缩松的形成原因与解决措施、氧化夹杂的成因与解决措施等。解决了生产中的实际难题,积累了经验和数据,缩短了产品的开发周期,使得该产品顺利投入量产。 关键词：低压铸造；铝合金 ；气缸盖；模具设计 ABSTRACT: Low pressure die casting is an important process of aluminum alloy die casting for manufacturing industry with the advantage of high precision, smooth filling, easy to make high quality casting and small machining allowance, saving energy etc. which has been the development trend for Cylinder Head casting industry. In China, as Low Pressure Die Casting for Aluminum Alloy cylinder head is still in the initial step now, and the theory and technology for Low Pressure Die Casting Aluminum Alloy cylinder head is not very maturity. So there will be important value for engineering application to perform the study on aluminum alloy cylinder head low pressure die casting process and technology, and also for our country industry rapid development. This article introduces Al-alloy cylinder head low pressure die casting actual production processes, such as sand core making, melting, pouring, cleaning and post-treatment, as well as the main problems in each process.Raise the key quality control points for Al-alloy cylinder head low pressure die casting, such as: the reasons for shrinkage holes and porosity and its solutions,as well as oxide inclusion. This article solves the difficult problem during the production and provides the data and experience for later other die casting product developing to shorten the development lead time, which make thisproduct enter into the mass production smoothly. Key words: low pressure die casti