Measurement and evaluation of three intersecting axes of precision equipment |
|---|
| T. S. R. Murthy |
- Abstract:
- In many precision machines and equipment, there are 2 or 3 axes intersecting at a point as per the drawing theoretically. One example is gyro spin axes construction. The other examples are N/C Machine tools with spindle and table and space equipment. In all of the above examples the axes are meeting at a common point. Presently each axis is measured separately for its straightness or perpendicularity with some surface. Though the axes can be measured separately, one cannot say to what extent they are meeting at a common point. And there are no standards to specify this error. As there are no methods so far to consider all the three axes simultaneously, satisfying condition, that they meet at a common point, a measurement and evaluation technique has been attempted in this paper. As the axis measurement data can be obtained on a CMM, different evaluation methods are explained in this paper. The algorithm takes into account the condition of passing through a point. This technique helps in managing the knowledge about each axis and the knowledge about all three axes. This knowledge and method of evaluation helps in managing such situations. The article also suggests different ways of specifying the accuracy in combination. A method to evaluate the axes when all the three axes are mutually perpendicular and later when any three axes are closely approaching is established by the author and now the method is established for any 3 axes meeting at a point.
- Keywords:
- GD & T; Evaluation of Intersecting axes
- Download:
- IMEKO-TC14-2007-54.pdf
- DOI:
- -
- Event details
- IMEKO TC:
- TC14
- Event name:
- TC14 ISMQC 2007
- Title:
9th Symposium on Measurement and Quality Control in Manufacturing
- Place:
- Chennai/Madras, INDIA
- Time:
- 21 November 2007 - 24 November 2007