We propose a taper thread compensation algorithm that considers the taper thread tilt state and tooth distortion to address the problem of low accuracy of taper thread inspection by machine vision. The analysis of the taper thread inspection process reveals the reason for the low accuracy of taper thread inspection, and the mathematical modeling of the taper thread is established according to the spatial geometric relationship. The experiment shows that the compensation rate of the algorithm is 80% of the base median, 70% of the thread half-angle, and 85% of the bottom width of the thread compared with that before the compensation, and it has less influence on the large diameter and pitch.

中文翻译：

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大螺距斜梯形锥螺纹畸变补偿算法

针对机器视觉锥螺纹检测精度低的问题，提出一种考虑锥螺纹倾斜状态和齿形畸变的锥螺纹补偿算法。通过对锥螺纹检验过程的分析，揭示了锥螺纹检验精度低的原因，并根据空间几何关系建立了锥螺纹的数学模型。实验表明，与补偿前相比，该算法的补偿率为底中值的80%、螺纹半角的70%、螺纹底宽的85%，对螺纹的影响较小。大直径和节距。