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Door hinge assembly and tightening

Time:2023-11-10

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· Customer needs:

M8x22 outer hexagon flange screw, the interference surface height of the product is 85mm;


· Working condition analysis:

1.Considering the height of the interference surface, select a screw driver with a telescopic head to meet the telescopic stroke within 50mm;


2. For the external hexagonal bolt, it is necessary to pay attention to the reverse rotation of the identification cap at the initial stage of tightening, and a multi-step tightening procedure can be set, first reverse and then pre-tighten (fast), stop the 0.1 S (release torque attenuation), and then final tighten (speed reduction), which can ensure the rhythm of 4S;


3. The effective and stable verification of this tightening strategy was put into use in the production line after 2 years.


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