高精度接触式测头测量力恒定设计方法研究

当测微仪采用接触式测头测量工件尺寸时,测量力的变化会对测量误差的修正造成一定影响,这种影响在大量程高精度测量中更为严重。为了减小这种影响,提高测量结果的精确度,利用弹簧弹力同磁铁磁力之间的动态力平衡原理设计一种恒力结构,并进行理论计算。对计算结果的分析与研究表明,利用该设计方法实现测量力恒定是可行的。

Study on Design Method of High-precision Contact Probe's Constant Measuring Force

When the micrometer uses the contact probe to measure the work-piece dimension, the changes ot asuring force could influence the measurement error correction. The influence will become more serious in long rant nd high precise measurement. In order to reduce the influence and enhance the precision of the measured results., a constant measuring force structure was designed utilizing the principle of dynamic force balance between the spring fo and the magnetic force, and a theoretical calculation was showed. The analysis and study of the measured results indicated that it was feasible to achieve the constant measuring force by utilizing the design method.