新型点磨削砂轮磨削力模型及试验研究

发布时间：2018-12-11 17:02

【摘要】：点磨削砂轮轴线与工件轴线之间存在倾斜角α,磨削过程中磨粒的运动轨迹改变,点磨削力及理论模型也随之变化。以传统磨削力理论为基础,利用点磨削模型的转换,建立点磨削力理论模型,通过试验验证理论模型的正确性。试验结果表明:模型的计算值与试验结果的趋势一致,数值相近。点磨削力模型为实际加工提供一种辅助和验证方法。同时提出一种带有粗磨区倾角θ的新型点磨削砂轮,在点磨削力模型的基础上,做了进一步研究,建立新型砂轮的磨削力分配模型。通过点磨削试验对该模型进行试验验证,用不同θ角的砂轮在一系列磨削参数条件下磨削阶梯轴。试验表明:模型分析结果与试验结果一致,在相同磨削参数下,带有粗磨区倾角θ的新型点磨削砂轮的磨削力要小于θ=0°的传统点磨削砂轮磨削力,磨削力随着θ角的增大而减小。此外,还可以得出磨削参数倾斜角α、磨削深度ap和砂轮速度vs对点磨削力的影响规律。
[Abstract]:There is an angle 伪 between the axis of grinding wheel and the axis of workpiece in point grinding, and the movement track of abrasive particles changes during grinding process, and the force and theoretical model of point grinding also change. Based on the traditional grinding force theory and the transformation of point grinding model, the point grinding force theory model is established, and the correctness of the theoretical model is verified by experiments. The experimental results show that the calculated values of the model are consistent with the experimental results, and the values are similar. The point grinding force model provides an auxiliary and verification method for practical machining. At the same time, a new type of grinding wheel with dip angle 胃 of rough grinding area is proposed. Based on the model of point grinding force, the grinding force distribution model of new type grinding wheel is established. The model is verified by point grinding test. The step shaft is ground with different 胃 angle grinding wheel under a series of grinding parameters. The experimental results show that the model analysis results are consistent with the experimental results. Under the same grinding parameters, the grinding force of the new type of grinding wheel with coarse grinding area inclination 胃 is less than that of the traditional point grinding wheel with 胃 = 0 掳. The grinding force decreases with the increase of 胃 angle. In addition, the effects of grinding parameters such as angle 伪, grinding depth ap and grinding wheel speed vs on point grinding force can be obtained.
【作者单位】：东北大学机械工程与自动化学院;
【基金】：国家自然科学基金资助项目(51075064,51205053)
【分类号】：TG580.6

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