Measuring and testing – Surface and cutting edge testing – Roughness
Patent
1989-01-17
1990-08-28
Williams, Hezron E.
Measuring and testing
Surface and cutting edge testing
Roughness
G01B 528
Patent
active
049514970
ABSTRACT:
This invention relates to a process for measuring the roughness of a surface of a piece in which there is applied on the rough surface of the piece a first surface of a deformable flat element and there is exerted on a second surface of the deformable flat element, parallel and opposite the first surface, a constant pressure in the direction of the piece, so that the first surface of the deformable element closely follows the profile of the rough surface, penetrating between the peaks of this rough surface, wherein the deformable flat element is made of a material having a high degree of reversible elastic deformability so that the first surface of the element penetrates elastically and reversibly between the peaks of the rough surface, and the deformation (Poisson's contraction or dilatation) or the resultant displacement of the second surface of the deformable element is measured in situ, i.e. while the deformable flat element is being pressed against the rough surface. The invention also relates to an apparatus for carrying out this process.
REFERENCES:
patent: 3777558 (1973-12-01), Bain
patent: 3800598 (1974-04-01), Michel
patent: 4198362 (1980-04-01), Ticker et al.
A.R.M.I.N.E.S.
Roskos Joseph W.
Williams Hezron E.
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