Research On Generating Precision And Measuring Control System Of Double-disc Involute Measuring Devices

Gears are necessary and ideal parts for machinery industrial. Gear transmission is not only able to pass movement and huge driving force, but also very evenly transfer movement. Although the basic principles of manufacturing gear has not changed. However, in recent years, design, materials, testing and manufacturing process technology has undergone dramatic changes and improvement. Especially the electronics industry, aerospace industry and military weapon systems use many of the precision gear, which made more stringent performance requirements. As a result, increasing the precision of gear measurement has become an important subject for gear manufacturing technology.As an important indicator of gear manufacturing, the tooth profile deviation directly impact on the carrying capacity, noise and the transmission quality of gears. Therefore, reducing tooth profile error can improve lots of the existing problems for gear drive. Reference Level Involute Measuring Apparatus and Involute Master Measuring Apparatus make use of double disc precision machinery to generating theory involute and is compared to the actual measured gear tooth profile to get gear tooth profile deviation. Because of its mechanical components with high-precision machining and assembling, the principle and the whole structure of apparatuses have characteristics of simple structure, little source of error, small error, which are able to satisfy high-precision gear tooth profile measurement.First, measurement and control system of double-disc involute measuring devices have been studied in this paper. According to the gear tooth profile deviation measurement requirements, the system of Involute Master Measuring Apparatus have been designed and built, measuring and control software have been programmed. VC + +6.0 is used to generate friendly interface, mainly in the software control, hardware and software have been combined to achieve the automation of involute master data acquisition and processing, the efficiency and accuracy of involute master measuring have been improved.Base circle discs and rail are important parts for double-disc involute measuring device. The generating precision is one of mainly factor, which impacts on gear tooth profile deviation measurement. In this paper, as two mainly factors of form precision, the method of precision installation of gear and disc in the shaft, as well as interaction between discs and rail have been studied: Based on VC software development tools, using data acquisition cards, according to the least square round principle to achieve roundness error data acquisition and process automatically. Based on analysis and experimental results, the method of precision installation of gear, discs and shaft was achieved, which minimized measuring error caused by eccentricity.For interaction between discs and rail, in this paper, the rolling flexibility creep phenomenon of disk on the marble-rail has been analyzed based on the finite element method, using ANSYS soft. The results are used to evaluate the instrument's measuring uncertainty.