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首页> 外文期刊>Journal of the Institution of Engineers (Inida) >Quantifying Interfacial Friction in Cold Forming using Forward Rod Backward Cup Extrusion Test
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Quantifying Interfacial Friction in Cold Forming using Forward Rod Backward Cup Extrusion Test

机译：使用前杆后退杯挤压测试量化冷成型中的界面摩擦

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摘要

Interfacial friction plays a vital role in cold forming and forging. Since this interfacial friction, if uncontrolled, would lead to many defects and problems, it is essential to measure this entity and to overcome it. Using forward rod backward cup extrusion test, this interfacial friction is quantified. A circular billet made of aluminium alloy 6063 is extruded to form a rod on one side and a cup on the other. The ratio of the height of the cup to the rod depth is a measure of the friction. Simulations have been carried out for various combinations of height/diameter of the billet and for different punch diameter to rod diameter ratios. The cup height to rod depth ratios have been calculated for the above combinations and those ratios were plotted to form calibration curves. Subsequently, the tests have been carried out for different friction conditions applying various lubricants. By plotting the values obtained during the tests on the calibration curves, the friction present during the cold forming process is quantified.
机译：界面摩擦在冷成形和锻造中起着至关重要的作用。由于这种界面摩擦（如果不受控制）会导致许多缺陷和问题，因此必须测量并克服它。使用前进杆后退杯挤压测试，可以量化该界面摩擦。由铝合金6063制成的圆形坯料被挤压以在一侧上形成杆并且在另一侧上形成杯。杯的高度与杆的深度之比是摩擦的量度。对于坯料的高度/直径的各种组合以及对于不同的冲头直径与棒直径的比率，已经进行了模拟。已经计算出上述组合的杯高度与杆深度的比率，并将这些比率作图以形成校准曲线。随后，针对使用各种润滑剂的不同摩擦条件进行了测试。通过将测试过程中获得的值绘制在校准曲线上，可以量化冷成型过程中存在的摩擦。

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