Tool driving or impacting – Automatic control of power operated means – Drive means responsive to torque or speed condition
Patent
1993-08-27
1994-11-22
Smith, Scott A.
Tool driving or impacting
Automatic control of power operated means
Drive means responsive to torque or speed condition
173181, 81467, 29407, 73761, 7386223, B25B 2314, B23P 1906
Patent
active
053660269
ABSTRACT:
In an impact type clamping apparatus including a motor unit for generating a pulsatory driving torque, a main spindle driven by said pulsatory driving torque to rotate a fastening member, a detecting unit for detecting a pulsatory torque applied to the main spindle, a calculating circuit for calculating a clamping force in accordance with a peak value of the pulsatory torque, and a control unit for stopping the operation of said motor unit when the calculated clamping force exceeds a desired clamping force, said clamping force is calculated not only from the peak value of the pulsatory torque but also from an increasing coefficient which represents a relationship between the peak value of the pulsatory torque and an increment of the clamping force. The increasing coefficient is gradually decreased in accordance with the increase in the clamping force, so that the clamping force can be calculated very accurately and the fastening member can be clamped with an actual clamping force which is very close to the desired clamping force.
REFERENCES:
patent: 4142591 (1979-03-01), Himmelstein
patent: 4244245 (1981-01-01), Wallace et al.
patent: 4274188 (1981-06-01), Eshghy
patent: 4361945 (1982-12-01), Eshghy
patent: 4418765 (1983-12-01), Mori et al.
patent: 4620450 (1986-11-01), Yamaguchi
patent: 4864903 (1989-09-01), Bickford et al.
patent: 4987669 (1991-01-01), Makimae et al.
patent: 5105519 (1992-04-01), Doniwa
patent: 5154242 (1992-10-01), Soshin et al.
patent: 5181575 (1993-01-01), Maruyama et al.
Fukumura Teruo
Maruyama Jun-ichi
Takeuchi Toru
Nissan Motor Company Ltd.
Smith Scott A.
LandOfFree
Impact type clamping apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Impact type clamping apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Impact type clamping apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1985405