Metal working – Method of mechanical manufacture – With testing or indicating
Patent
1976-12-29
1978-08-08
Ruehl, Charles A.
Metal working
Method of mechanical manufacture
With testing or indicating
73 88F, 173 12, B25B 2314
Patent
active
041047796
ABSTRACT:
A preferred embodiment of the invention disclosed herein relates to a method of and tightening system for tightening a joint assembly including a fastener system to a yield point of one of the members in the assembly. According to the method, torque is applied and rotation is imparted to a fastener member, and the torque and rotational displacement of the fastener are determined at predetermined increments of rotation for use in determining the area between successive increments of rotation under the Torque-Rotation curve which could be plotted. The incremental areas are compared to determine when some member in the joint assembly has been tightened to its yield point or some similarly significant point. The tightening system includes a wrench and a control system associated with the wrench including measuring systems for developing a first signal representative of the torque applied to the fastener and a second signal representative of the rotation of the fastener. Both the first and second signals are fed to an incremental area calculating system included in the control system, which calculates and develops a signal representative of the area under the Torque-Rotation curve which could be plotted for the fastener being tightened, between successive predetermined increments of rotation. The control system further includes decision making means responsive to the incremental area signals for developing a control signal when some member in the joint assembly has been tightened to its yield point or some similarly significant point.
REFERENCES:
patent: 3982419 (1976-09-01), Boys
patent: 4023406 (1977-05-01), Benz, Jr.
patent: 4027530 (1977-06-01), Tambini et al.
Nerenberg Aaron
Ruehl Charles A.
SPS Technologies, Inc.
LandOfFree
Tightening method and system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Tightening method and system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tightening method and system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-911319