Bosch Rexroth Nexo, Руководство пользователя

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3 608 870 A47
Tightening Technology |
Bosch Rexroth AG 261
/279
Nexo cordless Wi-Fi nutrunner
| 3 608 870 A47/2019-10
Torque monitoring (T–, T+)
1)
is used for error recognition. Their advantages include recognition of:
• Lot jumps in bolts and components
• defective bolts and components.
In this process, the bolt is stretched beyond its yield point until it plastically deforms. Re-usability of the
bolt is limited due to lasting cross-section constriction. This is why special bolts with sufficient deforma-
tion characteristics (e.g. stretch-shank bolts) should be used in this process.
As the result value for all data outputs, the maximum angle that occurred after the switch-off is output via
the target function.
1) Limit values (T–, T+) should be defined via statistical evaluation ( 50 tightening operations). Too
small tolerance limits result in a high number of NOK tightening cases; too large tolerance limits impair
error recognition.