数控机床切削力间接测量研究

Research for Indirect Cutting Force Measurement in the NC Machine

在数控加工中,切削力的大小直接影响着数控机床的加工精度与效率,因此对切削力的准确测量非常重要。传统利用力传感器直接测量切削力的方法存在许多缺陷,为此提出一种新的间接测量切削力的方法,即通过测量进给伺服电机电流来间接检测切削力。在详细分析了进给电机电流与切削力之间关系的基础上,建立了数学模型并进行了实验验证。实验证明该方法切实可行,具有重要的应用价值。

Precision measurement for cutting force plays an important role in the machining accuracy and efficiency of the numerically controlled machine tools. The traditional measurement has many deficiencies, which directly measures the cutting force by using force sensors. A new indirect method of measuring cutting force was proposed in which the current signal of the servo motor was measured instead of cutting force. The relationship was detailed analyzed and the mathematical models were created between the electrical current and the cutting force. Practical experiments have proved that the indirect measurement is reasonable and with an important application value.