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德国联邦物理技术研究院(PTB)与日本计量院(NMIJ)提出了将闭环技术应用于齿距偏差的测量,用于消除测量过程中的系统误差,达到高精度测量齿距偏差的目的.通过借鉴闭环测量技术,提出了齿距偏差两步测量法用于消除齿距偏差测量中的系统误差.首先将被测齿轮安装于齿距偏差测量仪中,对齿距偏差进行初次测量;测量结束后,将齿轮在测量仪中绕轴线改变一个齿距角的位置,再次对齿距偏差进行测量.根据齿距偏差与测量系统误差的关系及两次测量数据,可以建立数学模型对齿距偏差与系统误差进行求解,达到分离系统误差的目的.分别采用闭环技术与两步法对模数为6,齿数为20与模数为4,齿数为30的两个齿轮齿距偏差进行测量,并对测量结果进行比对,单个齿距偏差值分别相差0.10μm与0.15μm.测量结果说明,两步法可以应用于齿距偏差的高精度测量,同时,其测量过程相对于闭环技术更加简单,更易于广泛应用.
The German Federal Institute of Physics and Technology (PTB) and the Japan Institute of Metrology (NMIJ) put forward the application of closed loop technology to the measurement of tooth pitch deviation to eliminate systematic errors in the measurement process and achieve the purpose of accurately measuring the tooth pitch deviation. In reference to the closed-loop measurement technology, a two-step pitch deviation measurement method is proposed to eliminate the systematic error in the pitch deviation measurement. First, the measured gear is installed in the pitch deviation measuring instrument, and the pitch error is measured for the first time. After the gear in the measuring instrument around the axis to change the position of a pitch angle again measure the pitch deviation.According to the relationship between the pitch error and the measurement system error and the two measurement data can be established mathematical model of pitch deviation And system error to achieve the purpose of separating the system error.The closed loop technology and the two-step method were respectively used to measure the gear tooth pitch deviation of two gears whose modulus is 6, the number of teeth is 20, the module number is 4 and the number of teeth is 30 The results show that the two-step method can be applied to the high-precision measurement of tooth pitch deviation with the difference of 0.10μm and 0.15μm, respectively.At the same time, the measurement phase Closed-loop technology is simpler and easier to apply.