摘要
为解决目前应变式切削测力仪设计中普遍存在的刚度和灵敏度之间的矛盾,本文在对已有应变式切削测力仪特性进行分析的基础上,提出了切削测力仪的杠杆—附加弹性元件设计方法的原理,并讨论了应用该方法设计时有关的若干问题和该方法在解决切削测力仪刚度与灵敏度之间矛盾方面所可能的贡献。理论分析的结果表明,该方法能有效地解决测力仪的刚度和灵敏度的矛盾,为大幅度提高切削测力仪的综合精度指标开创了新的途径。最后,介绍了笔者采用杠杆附加弹性元件方法研制的新型切削测力仪。实测结果表明,该测力仪同时具有高刚度和高灵敏度,其刚度与灵敏度乘积指标较现有同类测力仪提高了近一个数量级。
On the basis of analysing the structural featutes of existing cutting dynamometers, a parasitic elastic element method is proposed to moderate the contradiction between sensitivity and rigidity of strain gage type dynamometers. Several relevant problems and the potential contribution of the method in the field of the contradiction moderation are discussed. Lastly, a practical example of using this method is given. It is shown that the product of the dynamometer's sensitivity and rigidity may be increased 10 times by the use of the method.
基金
航空科学青年基金
关键词
切削
测力仪
刚度
灵敏度
strain, rigidity, sensitivity, cutting dynamometer, structure optimization
