共查询到19条相似文献,搜索用时 62 毫秒
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以某汽车铝铸件为例,对该铸件在固定式浇注机上的金属型铸模工艺与模具结构设计以及工艺技术难点和解决办法等方面,进行了详细阐述,为固定式浇注机设计优良的金属型模具,提供了很好的设计思路及方法。 相似文献
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为了可靠提高铝制铸件产品的性能和品质,基于金属型铸造热交换的特点,通过制定金属型铸造工艺规范、调整涂料配方等技术方案,控制金属型的预热及上下型的温差、浇注温度与开模时间等工艺参数,达到了提高金属型使用寿命和铸件品质的目的。 相似文献
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孙和祥 《机械工人(热加工)》2005,(12):69-69
在实际生产中,金属型浇注铝合金铸件经常出现浇不足、缩松、氧化夹渣、气孔和针孔等铸造缺陷。现根据多年的生产实践,针对以上问题总结出以下几点看法,供同行参考。 相似文献
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苏羽平 《机械工人(热加工)》2004,(12):65-65
我公司在汽车动力转向器的先期生产中有几种铝合金铸件需采用金属型重力铸造方法生产。为适应与哈飞集团总公司新车型的同步发展的需要,我们自行设计了手动倾转重力浇注机,以最快的投产速度,保证了新车型生产的需要。 相似文献
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卢功辉 《机械工人(热加工)》2004,(4):71-73
分析了福特电喷进气歧管的结构特点,介绍了电喷进气歧管金属型重力铸造工艺设计的一些实践经验,针对生产中产生的缩孔、缩松、渣孔和气孔缺陷制定了合理的控制措施。 相似文献
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浇注系统对树脂砂铸件质量的影响 总被引:1,自引:0,他引:1
白光现 《机械工人(热加工)》1993,(5):2-4
树脂砂用于薄壁,高强度机床铸件的生产具有显著的技术效果。树脂砂的应用推动了中、小型机床铸件采用薄壁、高强度的结构设计,铸件主要壁厚减为2~15mm,材质提高到HT250以上。生产这类铸件时,常见铸造缺陷有皮下气孔、缩松、轻度变形裂纹、砂眼和夹渣等,其中皮下气孔和缩松是主要铸造 相似文献
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正高硅铝合金材料具有优越的摩擦性能,可作为先进的轻质耐磨材料,在各类交通运输工具动力机械、机床及特殊紧固件中得到了广泛的应用。如何开发这一先进的摩擦材料,一直是世界各国材料科学家奋斗的目标。通过世界各国科学家试验,发现高硅铝合金缸套的摩擦性能优于铸铁缸套,德国、英国、美国、日本等技术强国率先开发了高硅铝合金缸套。但国外大多采用喷射沉积技术制备高硅铝合金材料,然后再通过挤压的方式把高硅铝合金材料挤压成管材,最后通过对管材切割、加工等方式得到高硅铝合金缸套。 相似文献
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Development of a die design system for die casting 总被引:2,自引:0,他引:2
Y. K. Woon K. S. Lee 《The International Journal of Advanced Manufacturing Technology》2004,23(5-6):399-411
This paper presents a research work of a computer-aided die design system for die casting. The proposed system consists of seven distinct modules. Through these modules, the die designers are able to create a die casting die from a product part model. It is a user-friendly system that allows both experienced and novice die designers to easily accomplish the task of die design.The practical goal of this research is twofold: (1) to develop a system that integrates the different stages of die design process and (2) that at the same time facilitates the editing of die casting design during or after the course of the design process. The approach undertaken in this research includes (1) feature-based and constraint-based modelling, (2) parametric design and (3) a geometric and topological information extraction technique from a B-rep model. A prototype system has been developed using this approach and the system is able to aid the automation of the die casting die design process, thus improving the efficiency and quality of, and reducing the cost of die design for die casting. 相似文献
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Guo Zhipeng Xiong Shoumei Cho SangHyun Choi JeongKil 《Frontiers of Mechanical Engineering in China》2007,2(3):283-287
The present work focused on the determination of the interfacial heat transfer coefficient (IHTC) between metal and die during
the high pressure die casting (HPDC) process. Experiments were carried out on an aluminum alloy, ADC12Z, using “step shape”
casting—so-called because of its shape. The IHTC was successfully determined by solving one of the inverse heat problems using
the nonlinear estimation method first used by Beck. The calculation results indicated that the IHTC immediately increased
after liquid metal was brought into the cavity by the plunger and decreased as the solidification process of the liquid metal
proceeded. The liquid metal eventually solidified completely, a condition when the IHTC tended to be stable. Casting thickness
played an important role in affecting the IHTC between the metal and die not only in terms of its value but also in terms
of its change tendency. Also, under the test conditions, different change tendencies of the metal solid fraction were found
between castings with different thicknesses and the die.
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Translated from Acta Metallurgica Sinica, 2007, 43(1): 103–106 [ 译自: 金属学报] 相似文献
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