Method for measuring accuracy of thread groove and system for th

Details Method for measuring accuracy of thread groove and system for th Method for measuring accuracy of thread groove and system for th

1990-11-09

1993-10-05

Black, Thomas G.

Boots, shoes, and leggings

364560, 33504, 33199R, G01B 520, G01B 728, G06F 1546

Patent

active

052511545

ABSTRACT:
In measuring the accuracy of a thread groove of a ball thread formed in a nut by using an electric micrometer, a displacement of one point on each of a pair of flanks of the thread groove is measured along a longitudinal direction of the thread groove, and a pair of measured data sequences are obtained respectively for the pair of flanks. The data elements of the pair of measured data sequences are grouped into a plurality of groups so that each group includes a pair of data elements which are respectively contained in the pair of measured data sequences and which are corresponding to each other. The accuracy in the depth direction of the thread groove with respect to a reference thread groove is obtained on the basis of a sum of the data elements in each group, and the accuracy in the thread axis direction is obtained on the basis of a difference between the data elements in each pair.

REFERENCES:
patent: 3047960 (1962-08-01), Mittenbergs et al.
patent: 4356556 (1982-10-01), Sterki
patent: 4580348 (1986-04-01), DeBoynton et al.
patent: 4672750 (1987-06-01), Storace et al.
patent: 4706360 (1987-11-01), Callens, Jr. et al.
patent: 4761891 (1988-08-01), Sugimura
patent: 4852402 (1989-08-01), Bertz
Dr.-Ing. E. Bressel, et al., "Messung von Gewinden auf Koordinatenme Bgeraten", Feingeratetechnik, vol. 29, issue 2; 1980; pp. 73-75.

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