Correct screw tightening should not be underestimated
The correct tightening of each bolt is now recognized as a key indicator for all walks of life. Although the size of the bolt varies from a screw on a mobile phone to a bridge bolt on a slender arm, it needs a torque wrench to achieve the correct tightening operation. Otherwise, in the event of an accident, a small product will be damaged and a large one will endanger personal safety. The consequences can not be underestimated, which has been echoed by the industry.
Continuity Check of Performance Index of Torque Spanner
However, many enterprises are limited to the view that tightening operation with torque wrench is all right, ignoring the continuity of performance indicators of torque wrench, whether it still meets the factory indicators? For the more frequent use of torque wrenches, this continuation cycle is shorter. This point is also stipulated in the national standards. Therefore, it is necessary to check the torque wrench regularly to ensure that the performance indicators of the torque wrench are still within the prescribed range, which is the real good luck.
Case elaboration and Application
In the automotive industry, a famous automobile manufacturer is very clear about this point of view, and the quality control of torque wrench is also very strict.
According to ISO6789, the recommended check cycle of each wrench is one year or 5000 times. Whichever of these two conditions is satisfied first means that the wrench needs to be inspected immediately, otherwise the accuracy of the wrench will be greatly affected.
The pipeline operation of automobile manufacturer pursues efficient production. The strict control of quality and torque tool quality strictly follows the ISO6789 standard.
However, it is hard for the relevant quality inspectors of torque wrenches. Facing the inspection and verification of a large number of manual torque wrenches on the spot, it seems that they are not able to work hard. Hundreds or even thousands of times a day are loaded by hand frequently. Especially when testing large-sized torque wrenches, the force exerted by hand is greater, and the fatigue level of quality inspectors can be imagined. Often in such a fatiguing situation, but also attract criticism from the leadership, sometimes can not keep up with the pace of the production sector, the efficiency is greatly damaged, and even because of the failure to timely detect and bring a lot of losses to the enterprise.
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