固定式三向铣削测力仪的研究
Research on Fixed Three-Component Milling Force Sensor

由于铣刀在铣削过程中切削位置不同，固定型铣削测力仪将产生输出误差。为降低铣削位置变化对传感器输出的影响，研制了一种四竖直敏感梁结构的应变型固定式三维铣削测力仪。研究表明, 当铣削位置范围限定时，该测力仪可以将输出信号误差维持在可用范围，并分别进行了静态力测量和动态铣削实验。在静态力测量实验中，在70 mm×70 mm×15 mm工件上，传感器解耦偏差不大于5.58%；在动态切削实验中，使用相同加工参数在不同位置处铣削，传感器测得的铣削力峰峰值最大相差3.73%。对该铣削测力仪的研究为解决竖直方向高刚度的应变型固定式铣削力传感器的解耦问题提供了新的思路和参考。
Due to tool cutting position changing during milling process, output error is brought to fixed milling dynamometer. A fixed three components dynamometer with stain gauges bounded on four vertical sensitive beams is proposed to reduce the influence of milling position variation. Within the milling rang limit, the output error of the developed sensor is kept in an acceptable range. Static force applied test and dynamic milling experiment are both implemented. In a static force test with force applied on the 70mm×70mm×15mm workpiece,the maximum decoupling deviation is 5.58%. In milling experiment with identical machining parameters but different milling positions, the differences of peak to peak force values derived from sensor output are not more than 3.73%. The research on the dynamometer provides a new thought and reference to decoupling issues for strain based fixed milling force sensor with high stiffness in vertical direction.