FIELD: machine building.
SUBSTANCE: in the course of method to the screw nut it is applied rotational moment, it is measured current value of moment. Screw nut is turned for specified angle and after achievement by screw nut of specified value of rotational moment. After turning of screw nut for specified angle process of: screwdriving is stopped. Then screw nut is unscrewed for specified angle with measurement of current value of rotational moment and is calculated required value of tightening torque, at which it is provided specified axial pull force and final gripping up to achievement of designed value of moment. It is implemented measurement of differential torque at turning of screw nut for specified angle at primary gripping and screwdriving, herewith at screwdriving differential torque at screw nut turning for specified angle is defined after achievement by unscrewing moment of value of specified gripping moment, and required gripping moment is calculated according to particular formula. Device for gripping of threaded connections contains reversible air wrench and control unit for mentioned wrench for implementation of mentioned method.
EFFECT: control accuracy increasing of axial pull force.
2 cl, 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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RU2579343C1 |
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RU2552870C1 |
| METHOD OF MEASURING THREADED JOINT TIGHTENING FORCE AND TORQUE WRENCH TO THIS END | 2010 |
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| MULTISPINDLE NUT DRIVER | 0 |
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|
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| CONTROL SYSTEM FOR NUT SETTER | 0 |
|
SU1308985A1 |
| MULTISPINDLE POWER NUT DRIVER | 0 |
|
SU1142814A1 |
