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首页> 美国政府科技报告 >Development of an Automated Gear Tooth Contour Measuring Device.
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Development of an Automated Gear Tooth Contour Measuring Device.

机译：自动齿轮齿廓测量装置的研制。

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Phase I is a manually operated machine designed to demonstrate feasibility of measurement to an absolute accuracy of + or minus 10 to + or minus 30 microinches using a noncontacting optical probe. The Phase I testing demonstrated state-of-the-art performance as an environmentally compensated coordinate measuring machine wherein precision and absolute accuracy was shown to be better than the desired tolerance of + or minus 10 microinches. The noncontacting optic probe, also a state-of-the-art development, showed the sensitivity needed to meet the program goals. For the x-y coordinate measuring machine, errors associated with scale accuracy, vibration, structural rigidity, geometry and thermal effects were first defined analytically, and then correlated with the test data. Thermal stability tests were performed to show effects of machine warm-up from a cold start, effects of ambient temperature and atmospheric pressure changes, effects of human body heat, stabilized and transient operating conditions and the benefits of fluid filling the machine structure. Repeatibility tests were done for simple mechanical positioning precision and for part mensuration in the environmentally compensated mode. To evaluate absolute accuracy performance as an environmentally compensated system, gauge blocks were measured in an uncontrolled room at varying temperature around 12 degrees F higher than the meteorological standard.

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