| Summary: | 碩士 === 國立勤益科技大學 === 機械工程系 === 105 === In recent years, CNC rigid tapping has become very common in computer, electronics, and aerospace industries. Accurately and consistently in Rigid tapping results in shorter machining time, better part quality, and better tap life and tool life. But high efficiency will be at the expense of precision. This article is to explore the factors of what affects the tapping time and synchronization error when rigid tapping. By the use the high speed drilling and tapping machining center, with Japan's FANUC 0I-MD controller, spindle motor with βiI3/10000i, Z-axis motor with β8/3000is. Using linear regression analysis way to find the optimal setting of parameters and to build linear regression function by statistical analysis software. Let not only the synchronization error within the standard tolerances but also the cutting time shortest. In addition, adjust bandwidth、damping and filter parameters of the Z axis frequency response to eliminate resonance frequency. To improve the position gain after upgrading velocity gain, let frequency response become the best condition. Researching the influence of various parameter factors on rigid tapping, by using implementation of statistical analysis software, and linear regression analysis to figure the significant factors for the position gain and constant acceleration and deceleration time to establish Linear regression equation to trace the optimal parameter settings. After cutting verification. Its synchronization error is reduced by 621pulse (92%), Tapping time reduced by 2 seconds (7.7%), D0-D1 of the longitude by 0.216mm (26%), proving that the method of this adjustment is effective.
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