共查询到18条相似文献,搜索用时 424 毫秒
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《新技术新工艺》2021,(10)
大长径比薄壁零件越来越多地应用于军工行业,人们对此类零件的质量要求也越来越高,此类零件采用传统加工方法易产生弯曲、变形、壁厚不均匀等问题,旋压加工成形的显著优点是能够提高形状复杂零部件及高难度易变形材料的加工质量。通过对战斗部中心管这类大长径比薄壁零件采用旋压加工的实例分析,在研究了传统加工方法的基础上,提出了正旋工艺成形的工艺方案,同时,对旋压加工中的难点采取一系列工艺措施,有效解决了大长径比薄壁零件的加工难题。通过在军工产品实际生产中进行推广应用发现,该类零件采用旋压加工后可有效解决车削加工出现的问题,产品质量稳定、可靠,生产效率及产品合格率得到了提高,为该类型零件加工提供了可借鉴的经验。 相似文献
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三维非轴对称零件旋压成形工艺及设备 总被引:17,自引:0,他引:17
介绍了三维非轴对称零件的旋压成形工艺及设备,利用该设备不但可以加工普通的轴对称零件,还可加工传统旋压成形方法无法加工的三维非轴对称零件。另外,在进行轴对称零件的加工时,既可进行普通旋压,又可以进行强力旋压,还可完成有芯模或无芯模的旋压。 相似文献
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现代旋压技术是一种先进成形工艺,成为小批量、多品种回转型薄壁壳体零件的重要加工方法。随着旋压技术的迅猛发展,旋压可加工的范围不断扩大。将旋压工艺应用于制造薄壁齿轮件成为一种崭新的尝试,其生产的工件和传统的齿轮制造工艺相比,具有高强度、高精度和一次成形等无法比拟的优点。对薄壁内齿轮旋压成形工艺和研究现状进行了介绍,并对齿轮旋压制造技术的研究前景作了展望。 相似文献
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旋压模是分离机零件碟片旋压成型用工装,因此,旋压模零件模具体的硬度直接关系到碟片旋压成型后的质量。本文就设计改选模具体材料,提高硬度要求,原加工工艺无法适用,提出了工艺改进方案,经工艺实施,取得成功。 相似文献
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针对风机行业中轴流风机的关键零件轮毂,从成形方法选择、比较到选用旋压加工方法后的毛坯确定、模板设计、旋压参数选择、旋压机床控制等方面对普旋成形工艺进行讨论;结合旋压成形试验过程,给出了较理想的工艺方法,确认普旋工艺用于风机轮毂零件的成形加工,可得到美观实用的产品,企业又可获得很高的经济效益和很好的社会效益。 相似文献
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从旋压毛坯设计、旋压后零件状态确定、旋压参数选择、旋压芯轴和旋轮的设计等几个方面,讨论某型高压气瓶瓶身强力旋压工艺。结合旋压成形试验过程,制定出合理的工艺方案。通过试验验证该工艺方案完全适应高压气瓶瓶身的加工。 相似文献
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针对喇叭口支撑墩产品零件因变壁厚而导致用常规方法成形加工困难的状况,给出了一种用料省、投入少、产品美观、经济效益好的方法:旋压成形加工.阐述了旋压成形加工的工艺分析、工艺准备和工艺过程.从旋压设备、芯模、仿形板旋轮、毛坯材料、芯模间隙和润滑等方面做了相应讨论和描述.确认用旋压完成喇叭口支撑墩成形加工,企业可获得很高的经济效益,值得推广. 相似文献
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阐述了旋压零件结构、材料及旋压工艺特点,并阐述了旋压工艺参数的选定、旋压设备的选型以及旋压零件质量的保证。 相似文献
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Finite element simulation and experimental investigation on the forming forces of 3D non-axisymmetrical tubes spinning 总被引:4,自引:0,他引:4
3D non-axisymmetrical tube (NAT) spinning is a kind of new spinning technology, which breaks through the restriction that only axisymmetrical hollow parts could be produced by traditional spinning technology. The research on the spinning force aims to optimize the machine design and the processing parameters selection. The neck-spinning process of the 3D NAT is simulated by 3D elastic–plastic finite element software, MARC. The characteristics of the neck-spinning force of 3D NAT are compared with that of the axisymmetrical tube (AT) spinning. The effect of the main forming parameters, such as offset amount, oblique angle, nominal reduction of blank radius, feed rate and path direction, on the spinning forces have been studied theoretically and experimentally. It shows that during 3D NAT spinning, the spinning forces varies periodically with the revolution angle of the roller around the blank; the spinning force during backward path spinning is greater than that of forward path spinning. The simulation results conform well to the experimental ones. 相似文献
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Wei Luo Fei Chen Binbin Xu Zhaojun Yang Yaming Guo Bo Lu Tao Huang 《The International Journal of Advanced Manufacturing Technology》2018,98(5-8):1199-1216
Given their rapid development, aerospace and other high-tech industries are in urgent need of process technology for large complex thin-walled shells represented by large thin-walled parts with ring inner ribs and curvilinear generatrix. To make up for the deficiency in existing forming methods, this paper presents a compound spinning process that integrates counter-roller spinning, multi-neck spinning, and hot spinning. The finite element models for the counter-roller spinning and multi-neck spinning forming of such parts are established, and these models can simulate the influences of different spinning process parameters on workpiece maximum equivalent stress and maximum ovality. The 2A12 aluminum alloy tube blank is used in this paper. The process parameters for obtaining the counter-roller spinning for such parts are as follows: a feed ratio of 1.0 mm/r and a roller nose radius of 8 mm. The process parameters of multi-neck spinning are as follows: a feed ratio of 3.0 mm/r and a roller nose radius of 80 mm; and the forming temperature of hot spinning is 200–250 °C. Verification by a compound spinning test found that the numerical simulation results are consistent with the process test results. The process parameters can be used for guiding the actual production of large thin-walled parts with ring inner ribs and curvilinear generatrix. 相似文献
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Xia QinxiangDepartment of Mechanical Engineering South China University of Technology Guangzhou ChinaSusumu ShimaDepartment of Mechanical Engineering Kyoto University Kyoto - Japan 《机械工程学报(英文版)》2003,16(4)
Flexible spinning is a new type of spinning process where spin-forming is performedwithout using a mandrel. Combining shearing and rolling processes, the calculation formulas of thespinning forces in flexible spinning of cones is presented. The effects of the main processing parame-ters, such as gripping force G applied to the blank by the inner roller, the feed rate of rollers f and theroundness radius of outer roller r_o, on the spinning forces are analyzed experimentally and theoreti-cally. 相似文献