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A review of spinning, shear forming and flow forming processes 总被引:7,自引:0,他引:7
C. C. Wong T. A. Dean J. Lin 《International Journal of Machine Tools and Manufacture》2003,43(14):2891
In the last two decades or so, spinning and flow forming have gradually matured as metal forming processes for the production of engineering components in small to medium batch quantities. Combined spinning and flow forming techniques are being utilised increasingly due to the great flexibility provided for producing complicated parts nearer to net shape, enabling customers to optimise designs and reduce weight and cost, all of which are vital, especially in automotive industries.In this paper, process details of spinning and flow forming are introduced. The state of the art is described and developments in terms of research and industrial applications are reviewed. Also, the direction of research and development for future industrial applications are indicated. 相似文献
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D.Y. Yang M. Bambach J. Cao J.R. Duflou P. Groche T. Kuboki A. Sterzing A.E. Tekkaya C.W. Lee 《CIRP Annals》2018,67(2):743-765
Flexibility in metal forming is needed more than ever before due to rapidly changing customer demands. It paves the way for a better control of uncertainties in development and application of metal forming processes. Although flexibility has been pursued from various viewpoints in terms of machines, material, process, working environment and properties, etc., a thorough study of the concept was undertaken in order to with problems of manufacturing competiveness and tackle new challenges of manufacturing surroundings. Therefore, in this paper, flexibility in forming is reviewed from the viewpoints of process, material, manufacturing environment, new process combinations and machine–system–software interactions. 相似文献
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Spinning of sheet metals into cylindrical cups is an important sheet metal forming process for its advantages of flexible tooling and very small forming loads. The most challenging aspect in this process is its low formability due to wrinkling formation in the free flange. In this work, a new deep spinning process with roller set aided with blank-holder of constant clearance is proposed aiming to suppress the wrinkling formation in the deformation zone. Experimental work on annealed and hard aluminum sheet metals is carried out to assess the new process. The proposed spinning process has shown rapid increase in the formability of the sheet metals as the roller feed increases. On the other hand, significant increase in the roller feed worsens the formability of sheet metals in conventional spinning. The Limiting Spinning Ratios, LSRs; or the blank to mandrel diameters ratios, have increased from 1.75 using the conventional spinning to 2.40 using the deep spinning with annealed aluminum sheets in one pass. Also, the LSRs have increased from 1.67 using the conventional spinning to 2.24 using the deep spinning with hard aluminum sheets in one pass. New failure modes of flange jamming and wall fracture have been presented and discussed. In addition, the formability limitations, thickness strains, and spun cup form features at different process parameters are experimentally investigated and discussed. Further, a finite element model for the new process is presented and verified showing the limitation of the available shell elements offered by ANSYS Mechanical APDL in modeling the new process. 相似文献
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聚能射孔是石油开采过程中的重要环节,根据井下地质条件的不同选用不同种类的射孔弹是提高油气井开采的重要措施。药型罩作为聚能装药的核心部件,在爆轰产物的推动下,形成射流,最终对目标进行侵彻,药型罩的质量直接决定了爆破战斗部的侵彻和破甲性能。球形铜粉制造的药型罩主要采用旋压技术,通过射孔弹药型罩旋压成形液压机实现旋压加工。 相似文献
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成形工艺参数对杯形件单道次拉深旋压力的影响 总被引:2,自引:0,他引:2
分析了成形工艺参数对杯形件单道次拉深旋压力的影响,试验中所采取的成形工艺参数为:芯模转速n,材料性质、旋轮进给比f、名义拉深系数m以及旋轮与芯模之间的相对间隙C等。研究结果表明,除芯模转速外,其它成形工艺参数都不同程度地对旋压变形力产生影响,而且工件在成形过程中是否产生缩颈,将会影响到旋压力的变化特征。 相似文献
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一种铝合金轮毂铸旋成形工艺 总被引:1,自引:0,他引:1
常海平 《锻压装备与制造技术》2012,(4):67-69
介绍了铝合金轮毂铸旋成形工艺技术,铸旋工艺能够满足铝轮毂的高强度、轻量化要求,是未来铝合金轮毂工艺发展的主要方向之一。从铸旋生产背景、流程、铸旋工艺原理方面进行了介绍,并着重对影响旋压工艺的多种因素、参数设置及工艺优化进行了重点分析和说明,为铸旋成形工艺的研究提供了参考方向。 相似文献
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Flexible Automation for the Assembly in Motion 总被引:2,自引:0,他引:2
Automation in flow assembly lines is hindered by the need for clocked lines when using automated systems. Geometrical inaccuracies and vibrations of the conveyor systems complicate the use of automation as well. The assembly in motion, meaning a robot system which is synchronized in all degrees of freedom to the moving conveyor belt, is a promising attempt to solve these difficulties. Main advantages of synchronized assembly are the avoidance of buffers and the reduction of the throughput time.The automated assembly in motion is realized by using mechatronic components and innovative feedback algorithms which are currently under development. 相似文献
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现代旋压技术是广泛应用于航空、航天、军工等金属精密加工技术领域的一种先进塑性成形工艺。强力旋压是旋压技术的一个重要组成部分,对强力旋压的受力状态进行深入研究将有助于了解旋压工艺的特点和可能出现的缺陷。本文用弹塑性有限元法对强力旋压过程进行了模拟,获得了强力旋压稳定状态下应力应变的分布规律,解释了强力旋压的变形机理和隆起等缺陷产生的原因。 相似文献
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Influence of ultrasonic vibrations on tube spinning process 总被引:1,自引:0,他引:1
The main objective of this paper is to study the influence of longitudinal ultrasonic vibrations on the tube spinning process. A robust experimental tube spinning system was designed and manufactured, in which the preform and mandrel can be excited by ultrasonic vibrations. Tube spinning experiments under ultrasonic vibrations were carried out on annealed AA-6061 preforms. A modal analysis was used to study the vibrational behavior of the system. The forming forces acting on the non-vibrating roller were measured in radial, axial, and tangential directions. Experimental results showed that low power longitudinal ultrasonic vibrations can improve the inner surface quality of annealed 6061 aluminum samples. In addition, high power ultrasonic vibrations can affect forming forces and material escape. Analysis of forming forces variations under ultrasonic vibration revealed that these changes are mostly because of contact effects of ultrasonic vibrations. 相似文献
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介绍了五菱荣光四种车型柔性车身焊装生产线的开发过程,阐述设计过程中技术疑难问题攻关的方式方法.经生产实践表明,这种同平台多种车型柔性焊装生产线完全可行,显现了五菱"实现低成本,短周期.柔性化、高效率"的制造特色.对公司实现产销双过百万辆的目标作出了突出贡献. 相似文献
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应用信息分配法进行了柔轮旋压加工进给比与始旋角关系的模糊识别研究,并将计算得出的预测结果应用于生产,得到满足质量要求的柔轮毛坯。生产实践结果证明该方法是可行的,具有良好的识别效果。 相似文献
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采用数值模拟方法对大直径圆筒旋压成形进行分析。建立了D406A钢圆筒三维弹塑性有限元模型,分析了旋轮成形角、进给比和减薄率三个工艺参数对圆筒强力旋压成形壁厚均匀度的影响规律,为进一步研究大直径旋压圆筒变形规律提供一定的理论参考。 相似文献
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介绍了针对闭模挤压工艺开发的闭模挤压专用液压机。该研究工作对于进一步开发本体结构精密、控制高度柔性的闭模挤压专用设备、发展NNSF和NSF具有参考价值。 相似文献