Analytic Evaluation of Coaxiality error and Computer lmitation Research;

Study on the Key Technology in Coaxiality Error Evaluation Based on GPS;

The mathematical model to evaluate the coaxiality error by Minimum Area Method and the method and steps to seek fiducial axes by the mesh method are presented.

The virtual measuring instrument combines the technology to measure the form position error with virtual instrument to evaluate the axis straightness error by least square method and minimum zone estimation.

According to the definition of axis straightness error,a mathematical model was developed to evaluate axis straightness error by way of least square method in the rectangular coordinates.

To meet the requirement of 100% on-line inspection of gears in mass production in automotive and motorcycle industry, the two-flank principle is used to check the gear radial errors(thickness, radial composite error, run-out and error burs)and the gear axial errors(mean helix error, helix error and taper error)to realize the quick on-line inspection of gear machining flaws.

This paper, part seven of "Analysis of Errors and Inspection Groups on Hobbing Gear", dis- cusses the reason why the axial error occurs, the mathematical model and the relation between tol- erance group Ⅲ and axial error.

In this paper,the existing best-fit calculation,so as to the existence of axial RMS minimum goal for the design of the match,the current method of calculating the axial error is discussed,pointing out that some places a little unreasonable,a more accurate calculation of the axis to the formula for calculating the error and gives the derivation process.