锻造加工中摩擦特性评价方法的研究

New Evaluation Method of Tribo-Pefromance in Forging

介绍了冷锻造中摩擦特性评价的一种新方法。将圆柱工件挤压成有2个突出锥形的平板边缘形状,通 过测量工件的变形来计算硬模和工件之间的摩擦阻力。通过FEM分析,其摩擦阻力可以用摩擦系数定 量表示。在实验中将8种润滑油应用于铝合金工件,结果表明,这种方法对降低摩擦力的评价和对润滑 油防止表面磨损的评价都是有效的。

A new evaluation method of tribo-performance in cold forging has been developed. In this method, a round bar workpiece is extruded into 2 stage tapered flat die, and the frictional resistance between the die and work can be evaluated only by measuring the shape of deformed workpiece. In the test, the height and width of deformed workpiece is measured, and this test doesn't need the measurement of the extrusion pressure, which is also influenced by the flow stress of the material. In comparison with a nomogram obtained from FEM analysis, the frictional resistance can be expressed quantitatively as the friction coefficient. Experimental result about 8 types of lubricants for alijminum alloy workpiece shows that this method is useful for evaluating not only the effect of decreasing frictional resistance but also the galling prevention property of lubricants.