共查询到19条相似文献,搜索用时 62 毫秒
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三轮车车圈成形辊的孔形设计长沙摩托车厂肖名瑜薄壁冷弯型钢在型材方面如角钢、槽钢、波纹板、乃至自行车、摩托车上的车圈、泥板,都是典型的例子。一般只需增加一些辅助设备,就可形成流水线生产,生产效率高,其综合经济效益优于其他型材,故在工业及建筑行业得到了越... 相似文献
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叙述了板料滚压成形技术的原理,通过实例介绍了滚压成形辊轮的设计过程和设计要点,为汽车门窗密封条钢带滚压成形辊轮设计提供一定的参考。 相似文献
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钢铁材料半固态流变成形工艺参数设计原则 总被引:2,自引:1,他引:2
钢铁材料半固态成形的主要困难是工艺温度高、浆料制备及成形设备缺乏和工艺控制严格.其半固态流变成形比触变成形更加实用.通过分析半固态流变成形的工艺过程,给出了充型压力、补缩压力、加压时间、收缩率、锁模力、压头行程等工艺参数的设计计算公式和原则.对有色金属半固态成形也有一定的指导意义. 相似文献
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复杂成形件排样的合理与否,对模具制造的成败及稳定性致关重要,一副合理的排样图既可以提高生产效率,又可以降低模具的制造成本。文中介绍采用计算机中的专业设计软件对A36制件排样图设计的步骤进行了一一的解说,对类似的制件在排样设计时具有一定的参考价值。 相似文献
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开发中的冷弯成形新技术 总被引:1,自引:0,他引:1
冷弯成形具有成本低、可加工复杂截面的型材等优点,所成形的冷弯件在汽车、家具和建筑等领域的应用逐年增长。近年来,随着汽车行业对工件轻量化和安全性要求的不断提高,具有独特的高生产效率、高成材率优点的改进冷弯成形新工艺应运而生。本文主要介绍了最新研究的5种冷弯成形工艺,包括三维成形技术、非等厚辊弯成形技术、分枝辊弯成形技术、局部加热成形技术、热辊弯成形技术。前3种新冷弯成形工艺充分利用冷弯成形中逐道次成形的工艺特点,丰富了冷弯件的截面形状,打破了冷弯件的等截面、等厚度的固有概念。剩下两种新冷弯成形工艺直接改变了冷弯成形工艺在常温下成形的传统概念,使高强钢材料在冷弯成形工艺中应用范围扩大。 相似文献
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Longitudinal and shear strain development in cold roll forming 总被引:3,自引:0,他引:3
S. M. Panton J. L. Duncan S. D. Zhu 《Journal of Materials Processing Technology》1996,60(1-4):219-224
In this paper we examine strain development during the roll forming process and particularly the relationship between longitudinal and shear strain. It can be shown that theoretically it is possible for there to be no longitudinal strain during roll forming (in which case there would be shear strain) or no shear strain (in which case there would be longitudinal strain). In actual practice the strain will lie between these two extremes and will comprise both shear and longitudinal strain. This is seen to be consistent with experimental results. 相似文献
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在汽车覆盖件成形过程中通常会涉及到不同的成形工艺,许多典型汽车覆盖件的成形工艺方案是各种成形工艺的应用集成。该文主要介绍了汽车覆盖件成形工艺方案的拟定,在对典型汽车覆盖件成形工艺进行了具体分析的基础上,对汽车覆盖件成形工艺方案进行应用性研究,通过典型汽车覆盖件成形工艺得出不同的优化设计方案,实现了汽车覆盖件成形工艺的优化设计过程。 相似文献
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《Journal of Materials Processing Technology》2014,214(2):190-199
Cage roll forming is an advanced process for producing electric resistance welded (ERW) pipes. It is designed to improve the strip deformation and to increase the flexibility of production lines compared with the conventional roll forming of ERW pipes. One of the most important parameters of this process is the initial strip width. Accurate prediction of the initial strip width is vital for producing sound pipes with desired dimensional and geometrical tolerances. In this paper, cage roll forming process is simulated with the explicit elastic–plastic finite element method in the MSC Marc Mentat software. Simulation results show that by increasing the initial strip width, more circumferential length reduction is induced to the deformed strip in the fin-pass stands. This effect increases the difference of longitudinal strains at the edge and center of the deformed strip and consequently leads to a high longitudinal compression at the strip edge. Therefore, edge buckling will be unavoidable if the initial width is selected bigger than a specific limit. In order to predict the maximum initial width in cage forming process, an edge buckling criterion was introduced. The circumferential length and the horizontal distance between two deformed strip edges were obtained from the simulation and were compared with the experimental data from a production line. The comparison showed a good agreement and confirmed the finite element simulations. 相似文献