Measuring and testing – Frictional resistance – coefficient or characteristics
Patent
1995-05-01
1996-08-06
Raevis, Robert
Measuring and testing
Frictional resistance, coefficient or characteristics
G01N 356
Patent
active
055422810
ABSTRACT:
The present invention relates to a method and an apparatus for testing the surface properties, i.e., abrasion property, friction coefficient, lubrication property, etc., of cylindrical object, e.g., VTR head drums, photocopier or laser printer drums, sewing machine spindles, fishing rod reels, etc. The apparatus of the present invention provides: a mounting means upon which a specimen of cylindrical object and a relative specimen of a flexible material is mounted and which can measure tension; a motor control unit which is connected to said mounting means so as to enable control; an amplifier electrically connected to a tension meter of said mounting means; and a computer, electrically connected to said amplifier and said motor control unit, which has been programmed to record at timed intervals the motor rotation speed and the estimated tension values, and organizes and controls all of the above said parts. Further, said mounting means including a motor where cylindrical specimen is positioned and whose revolution may be accurately controlled; a tension meter wherein each end of said relative specimen is mounted where said relative specimen is wrapped around said specimen so that at least of part of the flexible material is in contact with said specimen; and a tension meter support upon which said tension meter is mounted. According to the present invention, the abrasion and lubrication properties of cylindrical object with respect to the relative material, such as magnetic recording tape, paper, wire, etc., which could not be gauged with previous methods, may be evaluated.
REFERENCES:
patent: 2910863 (1959-11-01), Hornbostel et al.
patent: 3324719 (1967-06-01), Segrave
Division of Ceramics, Korea Institute of Science and Technology, Kwang-Ryeol Lee, et al., "Measurement of Friction Coefficients Between Diamond-Like Carbon Coated VCR Head Drum and VCR Tapes".
Wear, vol. 93, pp. 81-99, 1984, Bharat Bhushan, "Influence of Test Parameters on the Measurement of the Coefficient of Friction of Magnetic Tapes"
Testing of Metallic and Inorganic Coatings, ASTM STP 947, pp. 310-319, 1987, Bharat Bhushan, "Overview of Coating Materials, Surface Treatments, and Screening Techniques for Tribological Applications-Part2: Screening Techniques".
Eun Kwang-Yong
Lee Kwang-Ryeol
Korea Institute of Science and Technology
Raevis Robert
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