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首页> 外文期刊>The International Journal of Advanced Manufacturing Technology >Surface roughness as the function of friction indicator and an important parameters-combination having controlling influence on the roughness: recent results in incremental forming
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Surface roughness as the function of friction indicator and an important parameters-combination having controlling influence on the roughness: recent results in incremental forming

机译：表面粗糙度作为摩擦指示器的功能和重要的参数 - 组合对粗糙度的影响：近期成果的结果

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摘要

Surface roughness affects the performance and service life of the formed components. To this end, efforts have been spent in the innovative incremental sheet forming (ISF) process. However, the researchers yet have not reached any agreement regarding the process effects on roughness. This demands further research to comprehend the knowledge in order to acquire a threshold level of understanding on surface roughening in the process. The present study investigates the processing effects upon the roughness of interior surfaces and on the friction indicator at the tool/sheet interface during forming of an aluminum sheet. Some of the sparsely studied parameters, namely flow stress, sheet thickness, and forming angle, are undertaken besides commonly considered ones (i.e., tool diameter and step size). The analysis of the results reveals that the friction indicator and roughness are analogous in respect of their response to parameter variations. Further, the roughness in general linearly increases with an increase in the friction indicator because the sheet abrasion correspondingly increases as revealed by the SEM-based surface morphology. A combination of parameters, among several attempted ones, namely dsin theta/2pt (where d is the tool diameter, theta is the forming angle, p is the step size, and t is the sheet thickness), is identified to have controlling influence on the roughness of interior surfaces. This combination is validated employing two materials namely Al1060 and Cu/Steel composite. In this combination, the factor d/2p followed by 1/t is found to have the greatest contribution towards the roughening of surfaces. Moreover, the value of this combination is proposed to keep low in order to produce components with good finish, say <= 50mm(-1) for Al10160 and 20mm(-1) for Cu/Steel composite. The present and past roughness studies in ISF are also compared, which reveals that the parameters effects are associated to the type of material.
机译：表面粗糙度影响所形成部件的性能和使用寿命。为此，在创新的增量表格（ISF）过程中已经花费了努力。但是，研究人员尚未达成任何关于粗糙度的过程效果的协议。这需要进一步研究，以了解知识，以便在该过程中获得关于表面粗糙化的理解阈值水平。本研究研究了在形成铝板期间工具/薄片界面处的内表面和摩擦指示器的加工效果。除了常见的情况下，还采用了一些稀疏研究的参数，即流量应力，片材厚度和形成角度，如常见的那样（即工具直径和台尺）。结果的分析表明，在对参数变化的响应方面类似地是类似的摩擦指示器和粗糙度。此外，一般的粗糙度随着摩擦指示器的增加而线性增加，因为纸张磨损相应地增加，如SEM的表面形态所揭示。参数的组合，在几个尝试的那些中，即Dsin Theta / 2pt（其中d是刀具直径，θ是成形角度，p是梯度尺寸，并且t是纸张厚度），被识别出对抗影响内表面的粗糙度。使用两种材料验证该组合即Al1060和Cu /钢复合材料。在这种组合中，发现因子D / 2P之后的1 / T对于表面的粗糙度具有最大的贡献。此外，提出了这种组合的值以保持低，以便为Cu /钢复合材料的Al10160和20mm（-1）表示<= 50mm（-1）。还比较ISF的目前和过去的粗糙度研究，揭示了参数效应与材料类型相关联。

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