Error-proofing mode for smart electric screwdrivers
2023-05-24
Smart electric screwdriver It can simultaneously record both the tightening torque and the angle of rotation. Although in most cases we use torque as the target value to control the tightening outcome, this feature of the electric screwdriver can also be leveraged to monitor the angle through which the bolt has rotated once the target torque is reached. In mass production, fasteners and connected parts are highly consistent; therefore, the monitored angle for tightening parts exhibiting abnormal conditions may deviate significantly from the data obtained for normal parts. Today, let’s take a look at the error-proofing mode of the smart electric screwdriver.
(1) Prevent repeated tightening
At workstations where multiple bolts need to be tightened, it sometimes happens that bolts already tightened are mistakenly re-tightened. Angle monitoring can prevent this type of error from occurring. When a bolt that has already been tightened is re-tightened, since the bolt has already reached its target torque, applying additional torque for a second tightening will result in an angle reading that is even significantly lower than the normal monitoring angle limit.
(2) Prevent incorrect bolt installation.
The angle-monitoring method can also detect errors caused by incorrect bolt installation. To address bolt-misinstallation detected via angle monitoring, it is necessary to analyze the differences in thread lengths and thereby determine the corresponding differences in tightening angles required. By keeping these angular differences beyond the limits of the monitored angle range, we can prevent the mixed installation of different bolts. Under the same conditions of achieving the target tightening torque, if an incorrect bolt is used, its monitored tightening angle will fall outside the normal monitoring range for the correct bolt. In such cases, the tightening gun will issue an alarm.
(3) Tighten the curve error-proofing method
For fasteners equipped with sealing rings or soft gaskets, we can employ the tightening curve-based error-proofing method to prevent operators from forgetting to install these seals. This method leverages the tightening curve of the fastener to detect whether the sealing ring or gasket has been omitted. Throughout the entire tightening process—from zero torque up to the target torque—the torque applied to the fastener gradually increases. By monitoring and recording the tightening procedure across the entire process, we can obtain a torque-versus-time curve that reflects the torque changes during tightening.
As smart electric screwdrivers become increasingly widespread in actual production, the role of error-proofing features in electric tightening tools is becoming ever more important. During product assembly, appropriate error-proofing methods can be selected based on the specific situation, thereby minimizing the likelihood of operators making mistakes and delivering substandard products to customers, and ensuring the quality of assembly.
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Relevant Information
Introduction to Smart Electric Screwdrivers
2023-08-19
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