Accession Number : ADA121970
Title : Development of an Automated Gear Tooth Contour Measuring Device.
Descriptive Note : Final rept. on Phase 1,
Corporate Author : AERODYNE RESEARCH INC BILLERICA MA
Personal Author(s) : Ouellette,Alfred R
Report Date : 12 Apr 1982
Pagination or Media Count : 112
Abstract : 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.
Descriptors : *AUTOMATION , *CONTOURS , *GEAR TEETH , THERMAL PROPERTIES , OPTICS , PROBES , MECHANICAL PROPERTIES , VIBRATION , EXPERIMENTAL DATA , STATE OF THE ART , ACCURACY , SCALE , FLUIDS , HEAT , RIGIDITY , FILLING
Subject Categories : Mfg & Industrial Eng & Control of Product Sys
Machinery and Tools
Distribution Statement : APPROVED FOR PUBLIC RELEASE