Measuring and testing – Dynamometers – Responsive to torque
Patent
1987-09-14
1989-11-28
Myracle, Jerry W.
Measuring and testing
Dynamometers
Responsive to torque
G01L 310
Patent
active
048829366
ABSTRACT:
A hand tool for applying torque to a fastener includes a portion for engaging the fastener, a handle to which torque is hand-applied and a torque carrying member operatively coupled with the handle and the fastener-engaging portion for transmitting the hand-applied torque to the fastener. The torque carrying member includes a magnetoelastic torque transducer comprising a ferromagnetic, magnetostrictive region affixed to, associated with or forming a part of the surface of the torqued member for altering in magnetic premeability in response to the application of torque to the member. Additionally, the transducer includes a magnetic source for applying a cyclically time varying magnetic field to the ferromagnetic, magnetostrictive region for sensing the change in permeability caused by the applied torque, apparatus/circuitry for converting the sensed change in permeability to an electrical signal indicative of the magnitude of the torque applied to the member and an indicator responsive to the electrical signal for providing an indication that a predetermined torque has been applied to the fastener. The ferromagnetic, magnetostrictive region is advantageously formed of nickel maraging steel, desirably 18% Ni maraging steel. Preferably, the transducer comprises a pair of axially spaced-apart annular bands defined within the ferromagnetic, magnetostrictive region, the bands being endowed with residual stress created, respectively symmetrical right and left hand helically directed magnetic anisotropy of sufficiently large magnitude that the contribution to total magnetic anistropy of any random anisotropy in the member is negligible.
REFERENCES:
patent: 3011340 (1961-12-01), Dahle
patent: 3340729 (1967-09-01), Sooppe
patent: 4236230 (1980-11-01), Thompson
patent: 4364278 (1982-12-01), Horter et al.
patent: 4414855 (1983-11-01), Iwasaki
patent: 4506554 (1985-03-01), Blomkvist et al.
patent: 4598595 (1986-07-01), Vranish et al.
patent: 4608872 (1986-09-01), Mayer et al.
patent: 4665756 (1987-05-01), Snyder
patent: 4703550 (1987-11-01), Hilzinger et al.
patent: 4727757 (1988-03-01), Hilzinger et al.
patent: 4765192 (1988-08-01), Hase et al.
Fleming, Automotive Torque Measurement: A Summary of Seven Different Methods, IEEE Trans on Vehic. Tech., vol. VT-31, No. 3, Aug. 1982.
Nachschlagewertk Stahlschlussel, 6th Edition, Apr. 1962, p. 42.
Beth and Meeks, "Magnetic Measurement of Torque in a Rotating Shaft", The Review of Scientific Instruments, vol. 25, No. 6, Jun., 1954.
Harada et al., "A New Torque Transducer Using Stress Sensitive Amorphous Ribbons", IEEE Trans. on Mag., MAG-18, No. 6, 1767-9, (1982).
Sasada, et al, "Torque Transducers With Stress-Sensitive Amorphous Ribbons of Chevron-Pattern", IEEE Trans. on Mag., MAG-20, No. 5, 951-53 (1984).
Mohri, "Review on Recent Advances in the Field of Amorphous-Metal Sensors and Transducers", IEEE Trans. on Mag., MAG-20, No. 5, 942-47 (1984).
Yamasaki, et al., "Torque Sensors Using Wire Explosion Magnetostrictive Alloy Layers", IEEE Trans. on Mag., MAG-22, No. 5, 403-405 (1986).
Sasada, et al., "Noncontact Torque Sensors Using Magnetic Heads and a Magnetostrictive Layer on the Shaft Surface-Application of Plasma Jet Spraying Process", IEEE Trans. on Mag., MAC-22, No. 5, 406-408 (1986).
Sasada, et al., "Noncontact Torque Sensor", presented 11/19/85 at 11th IEEE Industrial Electronics Society Conference.
Angeid, "Noncontacting Torquemeters Utilizing Magneto-Elastic Properties of Steel Shafts", ASME 69-GT-64 (1968).
Sasada, et al., "A New Method of Assembling a Torque Transducer by the Use of Bilayer-Structure Amorphous Ribbons", IEEE Trans. on Mag., MAG-19, No. 5, 2148-2150 (1983).
Winterhoff, et al., "Non-Contact Torque Measurements Using Eddy Current Sensors", Technisches Messen (Germany), 50, No. 12, 461-466 (1983).
Scoppe, et al., "Practical Application of Magnetostriction to a High Speed Torquemeter", 12 pages, presented Jun. 4-6, 1985, Thirteenth Transducer Workshop,-Vehicular Instrumentation/Transducer Committee, Telemetry Group, Range Commanders Council.
Garshelis, "A Study of the Inverse Wiedemann Effect on Circular Remanence", IEEE Trans. on Mag., MAG-10, No. 2, 344-358 (1974).
Garshelis, "The Wiedemann Effects and Applications", 38 pages, presented Jun. 5-6, 1975 at Applied Magnetics Workshop, IEEE Magnetics Society, Marquette University.
Sasada, et al., "Noncontact Torque Sensor Using Magnetic Heads and a Magnetostrictive Layer on the Shaft Surface", Abstract (1986).
Hall, et al., "The Metallurgy, Behavior, and Application of the 18-Percent Nickel Maraging Steels", NASA SP-5051, pp. 1-3, 5, 12-14, 23-41, 89-108, (1968).
"18%" Nickel Maraging Steels, The International Nickel Company, Inc., pp. 4-30, (1964).
VASCOMAX 200-250-300-350, Application Data for "18% Nickel Maraging Steels", Teleydyne Vasco (1968).
Mag Dev Inc.
Myracle Jerry W.
LandOfFree
Magnetoelastic torque tool does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magnetoelastic torque tool, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetoelastic torque tool will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-575195