Abstract
A single defect in the bushings of a tank track can cause track breakaway and thus it is important to evaluate the forming accuracy of the bushing during its mass production. In this research, an inline bushing measurement system, comprising of two linear variable differential transformer (LVDT) probes, precision alignment modules, and a stepping motor, was developed for an accurate inner shape prediction and measurement. In addition, an error prediction algorithm was developed for monitoring and controlling the machining quality of the bushing. The inner diameter was calculated by considering the best-fit circle obtained using the LVDT measurement data and the least squares method. The changes in the inner circle diameter were considered to be a machining error due to tool (insert) wear. The measured uncertainty of inner circle diameter was 0.015 mm. The proposed system was verified using the quality decision experimental results of the sample bushing.
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